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gtk3/gtk/gtktextview.c
Matthias Clasen bef8f3e46c Reset the virtual cursor position. (#326003, Evert Verhellen) 
2006-01-12  Matthias Clasen  <mclasen@redhat.com>

	* gtk/gtktextview.c (gtk_text_view_commit_text)
	(gtk_text_view_delete_from_cursor, gtk_text_view_backspace):
	Reset the virtual cursor position.  (#326003, Evert Verhellen)
2006-01-12 21:14:30 +00:00

8487 lines
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/* GTK - The GIMP Toolkit
* gtktextview.c Copyright (C) 2000 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <config.h>
#include <string.h>
#define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
#include "gtkbindings.h"
#include "gtkdnd.h"
#include "gtkimagemenuitem.h"
#include "gtkintl.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkmenu.h"
#include "gtkmenuitem.h"
#include "gtkseparatormenuitem.h"
#include "gtksettings.h"
#include "gtkstock.h"
#include "gtktextdisplay.h"
#include "gtktextview.h"
#include "gtkimmulticontext.h"
#include "gdk/gdkkeysyms.h"
#include "gtkprivate.h"
#include "gtksizegroup.h" /* FIXME http://bugzilla.gnome.org/show_bug.cgi?id=72258 */
#include "gtktextutil.h"
#include "gtkwindow.h"
#include "gtkalias.h"
/* How scrolling, validation, exposes, etc. work.
*
* The expose_event handler has the invariant that the onscreen lines
* have been validated.
*
* There are two ways that onscreen lines can become invalid. The first
* is to change which lines are onscreen. This happens when the value
* of a scroll adjustment changes. So the code path begins in
* gtk_text_view_value_changed() and goes like this:
* - gdk_window_scroll() to reflect the new adjustment value
* - validate the lines that were moved onscreen
* - gdk_window_process_updates() to handle the exposes immediately
*
* The second way is that you get the "invalidated" signal from the layout,
* indicating that lines have become invalid. This code path begins in
* invalidated_handler() and goes like this:
* - install high-priority idle which does the rest of the steps
* - if a scroll is pending from scroll_to_mark(), do the scroll,
* jumping to the gtk_text_view_value_changed() code path
* - otherwise, validate the onscreen lines
* - DO NOT process updates
*
* In both cases, validating the onscreen lines can trigger a scroll
* due to maintaining the first_para on the top of the screen.
* If validation triggers a scroll, we jump to the top of the code path
* for value_changed, and bail out of the current code path.
*
* Also, in size_allocate, if we invalidate some lines from changing
* the layout width, we need to go ahead and run the high-priority idle,
* because GTK sends exposes right after doing the size allocates without
* returning to the main loop. This is also why the high-priority idle
* is at a higher priority than resizing.
*
*/
#if 0
#define DEBUG_VALIDATION_AND_SCROLLING
#endif
#ifdef DEBUG_VALIDATION_AND_SCROLLING
#define DV(x) (x)
#else
#define DV(x)
#endif
#define SCREEN_WIDTH(widget) text_window_get_width (GTK_TEXT_VIEW (widget)->text_window)
#define SCREEN_HEIGHT(widget) text_window_get_height (GTK_TEXT_VIEW (widget)->text_window)
#define SPACE_FOR_CURSOR 1
struct _GtkTextPendingScroll
{
GtkTextMark *mark;
gdouble within_margin;
gboolean use_align;
gdouble xalign;
gdouble yalign;
};
enum
{
SET_SCROLL_ADJUSTMENTS,
POPULATE_POPUP,
MOVE_CURSOR,
PAGE_HORIZONTALLY,
SET_ANCHOR,
INSERT_AT_CURSOR,
DELETE_FROM_CURSOR,
BACKSPACE,
CUT_CLIPBOARD,
COPY_CLIPBOARD,
PASTE_CLIPBOARD,
TOGGLE_OVERWRITE,
MOVE_FOCUS,
MOVE_VIEWPORT,
SELECT_ALL,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_PIXELS_ABOVE_LINES,
PROP_PIXELS_BELOW_LINES,
PROP_PIXELS_INSIDE_WRAP,
PROP_EDITABLE,
PROP_WRAP_MODE,
PROP_JUSTIFICATION,
PROP_LEFT_MARGIN,
PROP_RIGHT_MARGIN,
PROP_INDENT,
PROP_TABS,
PROP_CURSOR_VISIBLE,
PROP_BUFFER,
PROP_OVERWRITE,
PROP_ACCEPTS_TAB,
LAST_PROP
};
static void gtk_text_view_init (GtkTextView *text_view);
static void gtk_text_view_class_init (GtkTextViewClass *klass);
static void gtk_text_view_destroy (GtkObject *object);
static void gtk_text_view_finalize (GObject *object);
static void gtk_text_view_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_text_view_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_text_view_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_text_view_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_text_view_realize (GtkWidget *widget);
static void gtk_text_view_unrealize (GtkWidget *widget);
static void gtk_text_view_style_set (GtkWidget *widget,
GtkStyle *previous_style);
static void gtk_text_view_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction);
static void gtk_text_view_grab_notify (GtkWidget *widget,
gboolean was_grabbed);
static void gtk_text_view_state_changed (GtkWidget *widget,
GtkStateType previous_state);
static gint gtk_text_view_event (GtkWidget *widget,
GdkEvent *event);
static gint gtk_text_view_key_press_event (GtkWidget *widget,
GdkEventKey *event);
static gint gtk_text_view_key_release_event (GtkWidget *widget,
GdkEventKey *event);
static gint gtk_text_view_button_press_event (GtkWidget *widget,
GdkEventButton *event);
static gint gtk_text_view_button_release_event (GtkWidget *widget,
GdkEventButton *event);
static gint gtk_text_view_focus_in_event (GtkWidget *widget,
GdkEventFocus *event);
static gint gtk_text_view_focus_out_event (GtkWidget *widget,
GdkEventFocus *event);
static gint gtk_text_view_motion_event (GtkWidget *widget,
GdkEventMotion *event);
static gint gtk_text_view_expose_event (GtkWidget *widget,
GdkEventExpose *expose);
static void gtk_text_view_draw_focus (GtkWidget *widget);
static gboolean gtk_text_view_focus (GtkWidget *widget,
GtkDirectionType direction);
static void gtk_text_view_select_all (GtkWidget *widget,
gboolean select);
/* Source side drag signals */
static void gtk_text_view_drag_begin (GtkWidget *widget,
GdkDragContext *context);
static void gtk_text_view_drag_end (GtkWidget *widget,
GdkDragContext *context);
static void gtk_text_view_drag_data_get (GtkWidget *widget,
GdkDragContext *context,
GtkSelectionData *selection_data,
guint info,
guint time);
static void gtk_text_view_drag_data_delete (GtkWidget *widget,
GdkDragContext *context);
/* Target side drag signals */
static void gtk_text_view_drag_leave (GtkWidget *widget,
GdkDragContext *context,
guint time);
static gboolean gtk_text_view_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static gboolean gtk_text_view_drag_drop (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static void gtk_text_view_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection_data,
guint info,
guint time);
static void gtk_text_view_set_scroll_adjustments (GtkTextView *text_view,
GtkAdjustment *hadj,
GtkAdjustment *vadj);
static gboolean gtk_text_view_popup_menu (GtkWidget *widget);
static void gtk_text_view_move_cursor (GtkTextView *text_view,
GtkMovementStep step,
gint count,
gboolean extend_selection);
static void gtk_text_view_page_horizontally (GtkTextView *text_view,
gint count,
gboolean extend_selection);
static void gtk_text_view_move_viewport (GtkTextView *text_view,
GtkScrollStep step,
gint count);
static void gtk_text_view_set_anchor (GtkTextView *text_view);
static void gtk_text_view_scroll_pages (GtkTextView *text_view,
gint count,
gboolean extend_selection);
static void gtk_text_view_scroll_hpages (GtkTextView *text_view,
gint count,
gboolean extend_selection);
static void gtk_text_view_insert_at_cursor (GtkTextView *text_view,
const gchar *str);
static void gtk_text_view_delete_from_cursor (GtkTextView *text_view,
GtkDeleteType type,
gint count);
static void gtk_text_view_backspace (GtkTextView *text_view);
static void gtk_text_view_cut_clipboard (GtkTextView *text_view);
static void gtk_text_view_copy_clipboard (GtkTextView *text_view);
static void gtk_text_view_paste_clipboard (GtkTextView *text_view);
static void gtk_text_view_toggle_overwrite (GtkTextView *text_view);
static void gtk_text_view_move_focus (GtkTextView *text_view,
GtkDirectionType direction_type);
static void gtk_text_view_unselect (GtkTextView *text_view);
static void gtk_text_view_validate_onscreen (GtkTextView *text_view);
static void gtk_text_view_get_first_para_iter (GtkTextView *text_view,
GtkTextIter *iter);
static void gtk_text_view_update_layout_width (GtkTextView *text_view);
static void gtk_text_view_set_attributes_from_style (GtkTextView *text_view,
GtkTextAttributes *values,
GtkStyle *style);
static void gtk_text_view_ensure_layout (GtkTextView *text_view);
static void gtk_text_view_destroy_layout (GtkTextView *text_view);
static void gtk_text_view_check_keymap_direction (GtkTextView *text_view);
static void gtk_text_view_reset_im_context (GtkTextView *text_view);
static void gtk_text_view_start_selection_drag (GtkTextView *text_view,
const GtkTextIter *iter,
GdkEventButton *event);
static gboolean gtk_text_view_end_selection_drag (GtkTextView *text_view,
GdkEventButton *event);
static void gtk_text_view_start_selection_dnd (GtkTextView *text_view,
const GtkTextIter *iter,
GdkEventMotion *event);
static void gtk_text_view_check_cursor_blink (GtkTextView *text_view);
static void gtk_text_view_pend_cursor_blink (GtkTextView *text_view);
static void gtk_text_view_stop_cursor_blink (GtkTextView *text_view);
static void gtk_text_view_value_changed (GtkAdjustment *adj,
GtkTextView *view);
static void gtk_text_view_commit_handler (GtkIMContext *context,
const gchar *str,
GtkTextView *text_view);
static void gtk_text_view_commit_text (GtkTextView *text_view,
const gchar *text);
static void gtk_text_view_preedit_changed_handler (GtkIMContext *context,
GtkTextView *text_view);
static gboolean gtk_text_view_retrieve_surrounding_handler (GtkIMContext *context,
GtkTextView *text_view);
static gboolean gtk_text_view_delete_surrounding_handler (GtkIMContext *context,
gint offset,
gint n_chars,
GtkTextView *text_view);
static void gtk_text_view_mark_set_handler (GtkTextBuffer *buffer,
const GtkTextIter *location,
GtkTextMark *mark,
gpointer data);
static void gtk_text_view_get_cursor_location (GtkTextView *text_view,
GdkRectangle *pos);
static void gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
gint *x,
gint *y);
static void gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
gint x,
gint y);
static GtkAdjustment* get_hadjustment (GtkTextView *text_view);
static GtkAdjustment* get_vadjustment (GtkTextView *text_view);
static void gtk_text_view_do_popup (GtkTextView *text_view,
GdkEventButton *event);
static void gtk_text_view_queue_scroll (GtkTextView *text_view,
GtkTextMark *mark,
gdouble within_margin,
gboolean use_align,
gdouble xalign,
gdouble yalign);
static gboolean gtk_text_view_flush_scroll (GtkTextView *text_view);
static void gtk_text_view_update_adjustments (GtkTextView *text_view);
static void gtk_text_view_invalidate (GtkTextView *text_view);
static void gtk_text_view_flush_first_validate (GtkTextView *text_view);
static void gtk_text_view_update_im_spot_location (GtkTextView *text_view);
/* Container methods */
static void gtk_text_view_add (GtkContainer *container,
GtkWidget *child);
static void gtk_text_view_remove (GtkContainer *container,
GtkWidget *child);
static void gtk_text_view_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data);
/* FIXME probably need the focus methods. */
typedef struct _GtkTextViewChild GtkTextViewChild;
struct _GtkTextViewChild
{
GtkWidget *widget;
GtkTextChildAnchor *anchor;
gint from_top_of_line;
gint from_left_of_buffer;
/* These are ignored if anchor != NULL */
GtkTextWindowType type;
gint x;
gint y;
};
static GtkTextViewChild* text_view_child_new_anchored (GtkWidget *child,
GtkTextChildAnchor *anchor,
GtkTextLayout *layout);
static GtkTextViewChild* text_view_child_new_window (GtkWidget *child,
GtkTextWindowType type,
gint x,
gint y);
static void text_view_child_free (GtkTextViewChild *child);
static void text_view_child_set_parent_window (GtkTextView *text_view,
GtkTextViewChild *child);
struct _GtkTextWindow
{
GtkTextWindowType type;
GtkWidget *widget;
GdkWindow *window;
GdkWindow *bin_window;
GtkRequisition requisition;
GdkRectangle allocation;
};
static GtkTextWindow *text_window_new (GtkTextWindowType type,
GtkWidget *widget,
gint width_request,
gint height_request);
static void text_window_free (GtkTextWindow *win);
static void text_window_realize (GtkTextWindow *win,
GdkWindow *parent);
static void text_window_unrealize (GtkTextWindow *win);
static void text_window_size_allocate (GtkTextWindow *win,
GdkRectangle *rect);
static void text_window_scroll (GtkTextWindow *win,
gint dx,
gint dy);
static void text_window_invalidate_rect (GtkTextWindow *win,
GdkRectangle *rect);
static void text_window_invalidate_cursors (GtkTextWindow *win);
static gint text_window_get_width (GtkTextWindow *win);
static gint text_window_get_height (GtkTextWindow *win);
static const GtkTargetEntry target_table[] = {
{ "GTK_TEXT_BUFFER_CONTENTS", GTK_TARGET_SAME_APP, 0 },
};
static GtkContainerClass *parent_class = NULL;
static guint signals[LAST_SIGNAL] = { 0 };
GType
gtk_text_view_get_type (void)
{
static GType our_type = 0;
if (our_type == 0)
{
static const GTypeInfo our_info =
{
sizeof (GtkTextViewClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_text_view_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkTextView),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_text_view_init,
};
our_type = g_type_register_static (GTK_TYPE_CONTAINER, I_("GtkTextView"),
&our_info, 0);
}
return our_type;
}
static void
add_move_binding (GtkBindingSet *binding_set,
guint keyval,
guint modmask,
GtkMovementStep step,
gint count)
{
g_assert ((modmask & GDK_SHIFT_MASK) == 0);
gtk_binding_entry_add_signal (binding_set, keyval, modmask,
"move_cursor", 3,
G_TYPE_ENUM, step,
G_TYPE_INT, count,
G_TYPE_BOOLEAN, FALSE);
/* Selection-extending version */
gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
"move_cursor", 3,
G_TYPE_ENUM, step,
G_TYPE_INT, count,
G_TYPE_BOOLEAN, TRUE);
}
static void
gtk_text_view_class_init (GtkTextViewClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
GtkBindingSet *binding_set;
parent_class = g_type_class_peek_parent (klass);
/* Default handlers and virtual methods
*/
gobject_class->set_property = gtk_text_view_set_property;
gobject_class->get_property = gtk_text_view_get_property;
object_class->destroy = gtk_text_view_destroy;
gobject_class->finalize = gtk_text_view_finalize;
widget_class->realize = gtk_text_view_realize;
widget_class->unrealize = gtk_text_view_unrealize;
widget_class->style_set = gtk_text_view_style_set;
widget_class->direction_changed = gtk_text_view_direction_changed;
widget_class->grab_notify = gtk_text_view_grab_notify;
widget_class->state_changed = gtk_text_view_state_changed;
widget_class->size_request = gtk_text_view_size_request;
widget_class->size_allocate = gtk_text_view_size_allocate;
widget_class->event = gtk_text_view_event;
widget_class->key_press_event = gtk_text_view_key_press_event;
widget_class->key_release_event = gtk_text_view_key_release_event;
widget_class->button_press_event = gtk_text_view_button_press_event;
widget_class->button_release_event = gtk_text_view_button_release_event;
widget_class->focus_in_event = gtk_text_view_focus_in_event;
widget_class->focus_out_event = gtk_text_view_focus_out_event;
widget_class->motion_notify_event = gtk_text_view_motion_event;
widget_class->expose_event = gtk_text_view_expose_event;
widget_class->focus = gtk_text_view_focus;
widget_class->drag_begin = gtk_text_view_drag_begin;
widget_class->drag_end = gtk_text_view_drag_end;
widget_class->drag_data_get = gtk_text_view_drag_data_get;
widget_class->drag_data_delete = gtk_text_view_drag_data_delete;
widget_class->drag_leave = gtk_text_view_drag_leave;
widget_class->drag_motion = gtk_text_view_drag_motion;
widget_class->drag_drop = gtk_text_view_drag_drop;
widget_class->drag_data_received = gtk_text_view_drag_data_received;
widget_class->popup_menu = gtk_text_view_popup_menu;
container_class->add = gtk_text_view_add;
container_class->remove = gtk_text_view_remove;
container_class->forall = gtk_text_view_forall;
klass->move_cursor = gtk_text_view_move_cursor;
klass->page_horizontally = gtk_text_view_page_horizontally;
klass->set_anchor = gtk_text_view_set_anchor;
klass->insert_at_cursor = gtk_text_view_insert_at_cursor;
klass->delete_from_cursor = gtk_text_view_delete_from_cursor;
klass->backspace = gtk_text_view_backspace;
klass->cut_clipboard = gtk_text_view_cut_clipboard;
klass->copy_clipboard = gtk_text_view_copy_clipboard;
klass->paste_clipboard = gtk_text_view_paste_clipboard;
klass->toggle_overwrite = gtk_text_view_toggle_overwrite;
klass->move_focus = gtk_text_view_move_focus;
klass->set_scroll_adjustments = gtk_text_view_set_scroll_adjustments;
/*
* Properties
*/
g_object_class_install_property (gobject_class,
PROP_PIXELS_ABOVE_LINES,
g_param_spec_int ("pixels-above-lines",
P_("Pixels Above Lines"),
P_("Pixels of blank space above paragraphs"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_PIXELS_BELOW_LINES,
g_param_spec_int ("pixels-below-lines",
P_("Pixels Below Lines"),
P_("Pixels of blank space below paragraphs"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_PIXELS_INSIDE_WRAP,
g_param_spec_int ("pixels-inside-wrap",
P_("Pixels Inside Wrap"),
P_("Pixels of blank space between wrapped lines in a paragraph"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_EDITABLE,
g_param_spec_boolean ("editable",
P_("Editable"),
P_("Whether the text can be modified by the user"),
TRUE,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_WRAP_MODE,
g_param_spec_enum ("wrap-mode",
P_("Wrap Mode"),
P_("Whether to wrap lines never, at word boundaries, or at character boundaries"),
GTK_TYPE_WRAP_MODE,
GTK_WRAP_NONE,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_JUSTIFICATION,
g_param_spec_enum ("justification",
P_("Justification"),
P_("Left, right, or center justification"),
GTK_TYPE_JUSTIFICATION,
GTK_JUSTIFY_LEFT,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_LEFT_MARGIN,
g_param_spec_int ("left-margin",
P_("Left Margin"),
P_("Width of the left margin in pixels"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_RIGHT_MARGIN,
g_param_spec_int ("right-margin",
P_("Right Margin"),
P_("Width of the right margin in pixels"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_INDENT,
g_param_spec_int ("indent",
P_("Indent"),
P_("Amount to indent the paragraph, in pixels"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_TABS,
g_param_spec_boxed ("tabs",
P_("Tabs"),
P_("Custom tabs for this text"),
PANGO_TYPE_TAB_ARRAY,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_CURSOR_VISIBLE,
g_param_spec_boolean ("cursor-visible",
P_("Cursor Visible"),
P_("If the insertion cursor is shown"),
TRUE,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_BUFFER,
g_param_spec_object ("buffer",
P_("Buffer"),
P_("The buffer which is displayed"),
GTK_TYPE_TEXT_BUFFER,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_OVERWRITE,
g_param_spec_boolean ("overwrite",
P_("Overwrite mode"),
P_("Whether entered text overwrites existing contents"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_ACCEPTS_TAB,
g_param_spec_boolean ("accepts-tab",
P_("Accepts tab"),
P_("Whether Tab will result in a tab character being entered"),
TRUE,
GTK_PARAM_READWRITE));
/*
* Style properties
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_boxed ("error-underline-color",
P_("Error underline color"),
P_("Color with which to draw error-indication underlines"),
GDK_TYPE_COLOR,
GTK_PARAM_READABLE));
/*
* Signals
*/
/**
* GtkTextView::move-cursor:
* @widget: the object which received the signal
* @step: the granularity of the move, as a #GtkMovementStep
* @count: the number of @step units to move
* @extend_selection: %TRUE if the move should extend the selection
*
* The ::move-cursor signal is a keybinding signal which gets emitted
* when the user initiates a cursor movement.
*
* Applications should not connect to it, but may emit it with
* g_signal_emit_by_name() if they need to control scrolling
* programmatically.
*
*/
signals[MOVE_CURSOR] =
g_signal_new (I_("move_cursor"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, move_cursor),
NULL, NULL,
_gtk_marshal_VOID__ENUM_INT_BOOLEAN,
G_TYPE_NONE, 3,
GTK_TYPE_MOVEMENT_STEP,
G_TYPE_INT,
G_TYPE_BOOLEAN);
signals[PAGE_HORIZONTALLY] =
g_signal_new (I_("page_horizontally"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, page_horizontally),
NULL, NULL,
_gtk_marshal_VOID__INT_BOOLEAN,
G_TYPE_NONE, 2,
G_TYPE_INT,
G_TYPE_BOOLEAN);
signals[MOVE_VIEWPORT] =
_gtk_binding_signal_new (I_("move_viewport"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gtk_text_view_move_viewport),
NULL, NULL,
_gtk_marshal_VOID__ENUM_INT,
G_TYPE_NONE, 2,
GTK_TYPE_SCROLL_STEP,
G_TYPE_INT);
signals[SET_ANCHOR] =
g_signal_new (I_("set_anchor"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, set_anchor),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[INSERT_AT_CURSOR] =
g_signal_new (I_("insert_at_cursor"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, insert_at_cursor),
NULL, NULL,
_gtk_marshal_VOID__STRING,
G_TYPE_NONE, 1,
G_TYPE_STRING);
signals[DELETE_FROM_CURSOR] =
g_signal_new (I_("delete_from_cursor"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, delete_from_cursor),
NULL, NULL,
_gtk_marshal_VOID__ENUM_INT,
G_TYPE_NONE, 2,
GTK_TYPE_DELETE_TYPE,
G_TYPE_INT);
signals[BACKSPACE] =
g_signal_new (I_("backspace"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, backspace),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[CUT_CLIPBOARD] =
g_signal_new (I_("cut_clipboard"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, cut_clipboard),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[COPY_CLIPBOARD] =
g_signal_new (I_("copy_clipboard"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, copy_clipboard),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[PASTE_CLIPBOARD] =
g_signal_new (I_("paste_clipboard"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, paste_clipboard),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[TOGGLE_OVERWRITE] =
g_signal_new (I_("toggle_overwrite"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, toggle_overwrite),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[MOVE_FOCUS] =
g_signal_new (I_("move_focus"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, move_focus),
NULL, NULL,
_gtk_marshal_VOID__ENUM,
G_TYPE_NONE, 1,
GTK_TYPE_DIRECTION_TYPE);
signals[SET_SCROLL_ADJUSTMENTS] =
g_signal_new (I_("set_scroll_adjustments"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkTextViewClass, set_scroll_adjustments),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_OBJECT,
G_TYPE_NONE, 2,
GTK_TYPE_ADJUSTMENT,
GTK_TYPE_ADJUSTMENT);
widget_class->set_scroll_adjustments_signal = signals[SET_SCROLL_ADJUSTMENTS];
signals[POPULATE_POPUP] =
g_signal_new (I_("populate_popup"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextViewClass, populate_popup),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GTK_TYPE_MENU);
signals[SELECT_ALL] =
_gtk_binding_signal_new (I_("select_all"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gtk_text_view_select_all),
NULL, NULL,
_gtk_marshal_VOID__BOOLEAN,
G_TYPE_NONE, 1,
G_TYPE_BOOLEAN, TRUE);
/*
* Key bindings
*/
binding_set = gtk_binding_set_by_class (klass);
/* Moving the insertion point */
add_move_binding (binding_set, GDK_Right, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, 1);
add_move_binding (binding_set, GDK_KP_Right, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, 1);
add_move_binding (binding_set, GDK_Left, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, -1);
add_move_binding (binding_set, GDK_KP_Left, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, -1);
add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, 1);
add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, 1);
add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, -1);
add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, 1);
add_move_binding (binding_set, GDK_Up, 0,
GTK_MOVEMENT_DISPLAY_LINES, -1);
add_move_binding (binding_set, GDK_KP_Up, 0,
GTK_MOVEMENT_DISPLAY_LINES, -1);
add_move_binding (binding_set, GDK_Down, 0,
GTK_MOVEMENT_DISPLAY_LINES, 1);
add_move_binding (binding_set, GDK_KP_Down, 0,
GTK_MOVEMENT_DISPLAY_LINES, 1);
add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK,
GTK_MOVEMENT_PARAGRAPHS, -1);
add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK,
GTK_MOVEMENT_PARAGRAPHS, -1);
add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK,
GTK_MOVEMENT_PARAGRAPHS, 1);
add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK,
GTK_MOVEMENT_PARAGRAPHS, 1);
add_move_binding (binding_set, GDK_Home, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
add_move_binding (binding_set, GDK_KP_Home, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
add_move_binding (binding_set, GDK_End, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
add_move_binding (binding_set, GDK_KP_End, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
add_move_binding (binding_set, GDK_Home, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, -1);
add_move_binding (binding_set, GDK_KP_Home, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, -1);
add_move_binding (binding_set, GDK_End, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, 1);
add_move_binding (binding_set, GDK_KP_End, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, 1);
add_move_binding (binding_set, GDK_Page_Up, 0,
GTK_MOVEMENT_PAGES, -1);
add_move_binding (binding_set, GDK_KP_Page_Up, 0,
GTK_MOVEMENT_PAGES, -1);
add_move_binding (binding_set, GDK_Page_Down, 0,
GTK_MOVEMENT_PAGES, 1);
add_move_binding (binding_set, GDK_KP_Page_Down, 0,
GTK_MOVEMENT_PAGES, 1);
add_move_binding (binding_set, GDK_Page_Up, GDK_CONTROL_MASK,
GTK_MOVEMENT_HORIZONTAL_PAGES, -1);
add_move_binding (binding_set, GDK_KP_Page_Up, GDK_CONTROL_MASK,
GTK_MOVEMENT_HORIZONTAL_PAGES, -1);
add_move_binding (binding_set, GDK_Page_Down, GDK_CONTROL_MASK,
GTK_MOVEMENT_HORIZONTAL_PAGES, 1);
add_move_binding (binding_set, GDK_KP_Page_Down, GDK_CONTROL_MASK,
GTK_MOVEMENT_HORIZONTAL_PAGES, 1);
/* Select all */
gtk_binding_entry_add_signal (binding_set, GDK_a, GDK_CONTROL_MASK,
"select_all", 1,
G_TYPE_BOOLEAN, TRUE);
gtk_binding_entry_add_signal (binding_set, GDK_slash, GDK_CONTROL_MASK,
"select_all", 1,
G_TYPE_BOOLEAN, TRUE);
/* Unselect all */
gtk_binding_entry_add_signal (binding_set, GDK_backslash, GDK_CONTROL_MASK,
"select_all", 1,
G_TYPE_BOOLEAN, FALSE);
gtk_binding_entry_add_signal (binding_set, GDK_a, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
"select_all", 1,
G_TYPE_BOOLEAN, FALSE);
/* Deleting text */
gtk_binding_entry_add_signal (binding_set, GDK_Delete, 0,
"delete_from_cursor", 2,
G_TYPE_ENUM, GTK_DELETE_CHARS,
G_TYPE_INT, 1);
gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, 0,
"delete_from_cursor", 2,
G_TYPE_ENUM, GTK_DELETE_CHARS,
G_TYPE_INT, 1);
gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, 0,
"backspace", 0);
/* Make this do the same as Backspace, to help with mis-typing */
gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, GDK_SHIFT_MASK,
"backspace", 0);
gtk_binding_entry_add_signal (binding_set, GDK_Delete, GDK_CONTROL_MASK,
"delete_from_cursor", 2,
G_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
G_TYPE_INT, 1);
gtk_binding_entry_add_signal (binding_set, GDK_KP_Delete, GDK_CONTROL_MASK,
"delete_from_cursor", 2,
G_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
G_TYPE_INT, 1);
gtk_binding_entry_add_signal (binding_set, GDK_BackSpace, GDK_CONTROL_MASK,
"delete_from_cursor", 2,
G_TYPE_ENUM, GTK_DELETE_WORD_ENDS,
G_TYPE_INT, -1);
/* Cut/copy/paste */
gtk_binding_entry_add_signal (binding_set, GDK_x, GDK_CONTROL_MASK,
"cut_clipboard", 0);
gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK,
"copy_clipboard", 0);
gtk_binding_entry_add_signal (binding_set, GDK_v, GDK_CONTROL_MASK,
"paste_clipboard", 0);
gtk_binding_entry_add_signal (binding_set, GDK_Delete, GDK_SHIFT_MASK,
"cut_clipboard", 0);
gtk_binding_entry_add_signal (binding_set, GDK_Insert, GDK_CONTROL_MASK,
"copy_clipboard", 0);
gtk_binding_entry_add_signal (binding_set, GDK_Insert, GDK_SHIFT_MASK,
"paste_clipboard", 0);
/* Overwrite */
gtk_binding_entry_add_signal (binding_set, GDK_Insert, 0,
"toggle_overwrite", 0);
gtk_binding_entry_add_signal (binding_set, GDK_KP_Insert, 0,
"toggle_overwrite", 0);
/* Control-tab focus motion */
gtk_binding_entry_add_signal (binding_set, GDK_Tab, GDK_CONTROL_MASK,
"move_focus", 1,
GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_FORWARD);
gtk_binding_entry_add_signal (binding_set, GDK_KP_Tab, GDK_CONTROL_MASK,
"move_focus", 1,
GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_FORWARD);
gtk_binding_entry_add_signal (binding_set, GDK_Tab, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
"move_focus", 1,
GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_BACKWARD);
gtk_binding_entry_add_signal (binding_set, GDK_KP_Tab, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
"move_focus", 1,
GTK_TYPE_DIRECTION_TYPE, GTK_DIR_TAB_BACKWARD);
}
static void
gtk_text_view_init (GtkTextView *text_view)
{
GtkWidget *widget;
widget = GTK_WIDGET (text_view);
GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
/* Set up default style */
text_view->wrap_mode = GTK_WRAP_NONE;
text_view->pixels_above_lines = 0;
text_view->pixels_below_lines = 0;
text_view->pixels_inside_wrap = 0;
text_view->justify = GTK_JUSTIFY_LEFT;
text_view->left_margin = 0;
text_view->right_margin = 0;
text_view->indent = 0;
text_view->tabs = NULL;
text_view->editable = TRUE;
gtk_drag_dest_set (widget,
0,
target_table, G_N_ELEMENTS (target_table),
GDK_ACTION_COPY | GDK_ACTION_MOVE);
gtk_drag_dest_add_text_targets (widget);
text_view->virtual_cursor_x = -1;
text_view->virtual_cursor_y = -1;
/* This object is completely private. No external entity can gain a reference
* to it; so we create it here and destroy it in finalize ().
*/
text_view->im_context = gtk_im_multicontext_new ();
g_signal_connect (text_view->im_context, "commit",
G_CALLBACK (gtk_text_view_commit_handler), text_view);
g_signal_connect (text_view->im_context, "preedit_changed",
G_CALLBACK (gtk_text_view_preedit_changed_handler), text_view);
g_signal_connect (text_view->im_context, "retrieve_surrounding",
G_CALLBACK (gtk_text_view_retrieve_surrounding_handler), text_view);
g_signal_connect (text_view->im_context, "delete_surrounding",
G_CALLBACK (gtk_text_view_delete_surrounding_handler), text_view);
text_view->cursor_visible = TRUE;
text_view->accepts_tab = TRUE;
text_view->text_window = text_window_new (GTK_TEXT_WINDOW_TEXT,
widget, 200, 200);
text_view->drag_start_x = -1;
text_view->drag_start_y = -1;
text_view->pending_place_cursor_button = 0;
/* We handle all our own redrawing */
gtk_widget_set_redraw_on_allocate (widget, FALSE);
}
/**
* gtk_text_view_new:
*
* Creates a new #GtkTextView. If you don't call gtk_text_view_set_buffer()
* before using the text view, an empty default buffer will be created
* for you. Get the buffer with gtk_text_view_get_buffer(). If you want
* to specify your own buffer, consider gtk_text_view_new_with_buffer().
*
* Return value: a new #GtkTextView
**/
GtkWidget*
gtk_text_view_new (void)
{
return g_object_new (GTK_TYPE_TEXT_VIEW, NULL);
}
/**
* gtk_text_view_new_with_buffer:
* @buffer: a #GtkTextBuffer
*
* Creates a new #GtkTextView widget displaying the buffer
* @buffer. One buffer can be shared among many widgets.
* @buffer may be NULL to create a default buffer, in which case
* this function is equivalent to gtk_text_view_new(). The
* text view adds its own reference count to the buffer; it does not
* take over an existing reference.
*
* Return value: a new #GtkTextView.
**/
GtkWidget*
gtk_text_view_new_with_buffer (GtkTextBuffer *buffer)
{
GtkTextView *text_view;
text_view = (GtkTextView*)gtk_text_view_new ();
gtk_text_view_set_buffer (text_view, buffer);
return GTK_WIDGET (text_view);
}
/**
* gtk_text_view_set_buffer:
* @text_view: a #GtkTextView
* @buffer: a #GtkTextBuffer
*
* Sets @buffer as the buffer being displayed by @text_view. The previous
* buffer displayed by the text view is unreferenced, and a reference is
* added to @buffer. If you owned a reference to @buffer before passing it
* to this function, you must remove that reference yourself; #GtkTextView
* will not "adopt" it.
*
**/
void
gtk_text_view_set_buffer (GtkTextView *text_view,
GtkTextBuffer *buffer)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
if (text_view->buffer == buffer)
return;
if (text_view->buffer != NULL)
{
/* Destroy all anchored children */
GSList *tmp_list;
GSList *copy;
copy = g_slist_copy (text_view->children);
tmp_list = copy;
while (tmp_list != NULL)
{
GtkTextViewChild *vc = tmp_list->data;
if (vc->anchor)
{
gtk_widget_destroy (vc->widget);
/* vc may now be invalid! */
}
tmp_list = g_slist_next (tmp_list);
}
g_slist_free (copy);
g_signal_handlers_disconnect_by_func (text_view->buffer,
gtk_text_view_mark_set_handler,
text_view);
g_object_unref (text_view->buffer);
text_view->dnd_mark = NULL;
if (GTK_WIDGET_REALIZED (text_view))
{
GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
GDK_SELECTION_PRIMARY);
gtk_text_buffer_remove_selection_clipboard (text_view->buffer, clipboard);
}
}
text_view->buffer = buffer;
if (buffer != NULL)
{
GtkTextIter start;
g_object_ref (buffer);
if (text_view->layout)
gtk_text_layout_set_buffer (text_view->layout, buffer);
gtk_text_buffer_get_iter_at_offset (text_view->buffer, &start, 0);
text_view->dnd_mark = gtk_text_buffer_create_mark (text_view->buffer,
"gtk_drag_target",
&start, FALSE);
text_view->first_para_mark = gtk_text_buffer_create_mark (text_view->buffer,
NULL,
&start, TRUE);
text_view->first_para_pixels = 0;
g_signal_connect (text_view->buffer, "mark_set",
G_CALLBACK (gtk_text_view_mark_set_handler), text_view);
if (GTK_WIDGET_REALIZED (text_view))
{
GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
GDK_SELECTION_PRIMARY);
gtk_text_buffer_add_selection_clipboard (text_view->buffer, clipboard);
}
}
g_object_notify (G_OBJECT (text_view), "buffer");
if (GTK_WIDGET_VISIBLE (text_view))
gtk_widget_queue_draw (GTK_WIDGET (text_view));
DV(g_print ("Invalidating due to set_buffer\n"));
gtk_text_view_invalidate (text_view);
}
static GtkTextBuffer*
get_buffer (GtkTextView *text_view)
{
if (text_view->buffer == NULL)
{
GtkTextBuffer *b;
b = gtk_text_buffer_new (NULL);
gtk_text_view_set_buffer (text_view, b);
g_object_unref (b);
}
return text_view->buffer;
}
/**
* gtk_text_view_get_buffer:
* @text_view: a #GtkTextView
*
* Returns the #GtkTextBuffer being displayed by this text view.
* The reference count on the buffer is not incremented; the caller
* of this function won't own a new reference.
*
* Return value: a #GtkTextBuffer
**/
GtkTextBuffer*
gtk_text_view_get_buffer (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
return get_buffer (text_view);
}
/**
* gtk_text_view_get_iter_at_location:
* @text_view: a #GtkTextView
* @iter: a #GtkTextIter
* @x: x position, in buffer coordinates
* @y: y position, in buffer coordinates
*
* Retrieves the iterator at buffer coordinates @x and @y. Buffer
* coordinates are coordinates for the entire buffer, not just the
* currently-displayed portion. If you have coordinates from an
* event, you have to convert those to buffer coordinates with
* gtk_text_view_window_to_buffer_coords().
*
**/
void
gtk_text_view_get_iter_at_location (GtkTextView *text_view,
GtkTextIter *iter,
gint x,
gint y)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
g_return_if_fail (iter != NULL);
gtk_text_view_ensure_layout (text_view);
gtk_text_layout_get_iter_at_pixel (text_view->layout,
iter, x, y);
}
/**
* gtk_text_view_get_iter_at_position:
* @text_view: a #GtkTextView
* @iter: a #GtkTextIter
* @trailing: location to store an integer indicating where
* in the grapheme the user clicked. It will either be
* zero, or the number of characters in the grapheme.
* 0 represents the trailing edge of the grapheme.
* @x: x position, in buffer coordinates
* @y: y position, in buffer coordinates
*
* Retrieves the iterator pointing to the character at buffer
* coordinates @x and @y. Buffer coordinates are coordinates for
* the entire buffer, not just the currently-displayed portion.
* If you have coordinates from an event, you have to convert
* those to buffer coordinates with
* gtk_text_view_window_to_buffer_coords().
*
* Note that this is different from gtk_text_view_get_iter_at_location(),
* which returns cursor locations, i.e. positions <emphasis>between</emphasis>
* characters.
*
* Since: 2.6
**/
void
gtk_text_view_get_iter_at_position (GtkTextView *text_view,
GtkTextIter *iter,
gint *trailing,
gint x,
gint y)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
g_return_if_fail (iter != NULL);
gtk_text_view_ensure_layout (text_view);
gtk_text_layout_get_iter_at_position (text_view->layout,
iter, trailing, x, y);
}
/**
* gtk_text_view_get_iter_location:
* @text_view: a #GtkTextView
* @iter: a #GtkTextIter
* @location: bounds of the character at @iter
*
* Gets a rectangle which roughly contains the character at @iter.
* The rectangle position is in buffer coordinates; use
* gtk_text_view_buffer_to_window_coords() to convert these
* coordinates to coordinates for one of the windows in the text view.
*
**/
void
gtk_text_view_get_iter_location (GtkTextView *text_view,
const GtkTextIter *iter,
GdkRectangle *location)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
gtk_text_view_ensure_layout (text_view);
gtk_text_layout_get_iter_location (text_view->layout, iter, location);
}
/**
* gtk_text_view_get_line_yrange:
* @text_view: a #GtkTextView
* @iter: a #GtkTextIter
* @y: return location for a y coordinate
* @height: return location for a height
*
* Gets the y coordinate of the top of the line containing @iter,
* and the height of the line. The coordinate is a buffer coordinate;
* convert to window coordinates with gtk_text_view_buffer_to_window_coords().
*
**/
void
gtk_text_view_get_line_yrange (GtkTextView *text_view,
const GtkTextIter *iter,
gint *y,
gint *height)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
g_return_if_fail (gtk_text_iter_get_buffer (iter) == get_buffer (text_view));
gtk_text_view_ensure_layout (text_view);
gtk_text_layout_get_line_yrange (text_view->layout,
iter,
y,
height);
}
/**
* gtk_text_view_get_line_at_y:
* @text_view: a #GtkTextView
* @target_iter: a #GtkTextIter
* @y: a y coordinate
* @line_top: return location for top coordinate of the line
*
* Gets the #GtkTextIter at the start of the line containing
* the coordinate @y. @y is in buffer coordinates, convert from
* window coordinates with gtk_text_view_window_to_buffer_coords().
* If non-%NULL, @line_top will be filled with the coordinate of the top
* edge of the line.
**/
void
gtk_text_view_get_line_at_y (GtkTextView *text_view,
GtkTextIter *target_iter,
gint y,
gint *line_top)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
gtk_text_view_ensure_layout (text_view);
gtk_text_layout_get_line_at_y (text_view->layout,
target_iter,
y,
line_top);
}
static gboolean
set_adjustment_clamped (GtkAdjustment *adj, gdouble val)
{
DV (g_print (" Setting adj to raw value %g\n", val));
/* We don't really want to clamp to upper; we want to clamp to
upper - page_size which is the highest value the scrollbar
will let us reach. */
if (val > (adj->upper - adj->page_size))
val = adj->upper - adj->page_size;
if (val < adj->lower)
val = adj->lower;
if (val != adj->value)
{
DV (g_print (" Setting adj to clamped value %g\n", val));
gtk_adjustment_set_value (adj, val);
return TRUE;
}
else
return FALSE;
}
/**
* gtk_text_view_scroll_to_iter:
* @text_view: a #GtkTextView
* @iter: a #GtkTextIter
* @within_margin: margin as a [0.0,0.5) fraction of screen size
* @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
* @xalign: horizontal alignment of mark within visible area.
* @yalign: vertical alignment of mark within visible area
*
* Scrolls @text_view so that @iter is on the screen in the position
* indicated by @xalign and @yalign. An alignment of 0.0 indicates
* left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
* is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
* possibly not scrolling at all. The effective screen for purposes
* of this function is reduced by a margin of size @within_margin.
* NOTE: This function uses the currently-computed height of the
* lines in the text buffer. Note that line heights are computed
* in an idle handler; so this function may not have the desired effect
* if it's called before the height computations. To avoid oddness,
* consider using gtk_text_view_scroll_to_mark() which saves a point
* to be scrolled to after line validation.
*
* Return value: %TRUE if scrolling occurred
**/
gboolean
gtk_text_view_scroll_to_iter (GtkTextView *text_view,
GtkTextIter *iter,
gdouble within_margin,
gboolean use_align,
gdouble xalign,
gdouble yalign)
{
GdkRectangle rect;
GdkRectangle screen;
gint screen_bottom;
gint screen_right;
gint scroll_dest;
GtkWidget *widget;
gboolean retval = FALSE;
gint scroll_inc;
gint screen_xoffset, screen_yoffset;
gint current_x_scroll, current_y_scroll;
/* FIXME why don't we do the validate-at-scroll-destination thing
* from flush_scroll in this function? I think it wasn't done before
* because changed_handler was screwed up, but I could be wrong.
*/
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
g_return_val_if_fail (within_margin >= 0.0 && within_margin < 0.5, FALSE);
g_return_val_if_fail (xalign >= 0.0 && xalign <= 1.0, FALSE);
g_return_val_if_fail (yalign >= 0.0 && yalign <= 1.0, FALSE);
widget = GTK_WIDGET (text_view);
DV(g_print(G_STRLOC"\n"));
gtk_text_layout_get_iter_location (text_view->layout,
iter,
&rect);
DV (g_print (" target rect %d,%d %d x %d\n", rect.x, rect.y, rect.width, rect.height));
current_x_scroll = text_view->xoffset;
current_y_scroll = text_view->yoffset;
screen.x = current_x_scroll;
screen.y = current_y_scroll;
screen.width = SCREEN_WIDTH (widget);
screen.height = SCREEN_HEIGHT (widget);
screen_xoffset = screen.width * within_margin;
screen_yoffset = screen.height * within_margin;
screen.x += screen_xoffset;
screen.y += screen_yoffset;
screen.width -= screen_xoffset * 2;
screen.height -= screen_yoffset * 2;
/* paranoia check */
if (screen.width < 1)
screen.width = 1;
if (screen.height < 1)
screen.height = 1;
/* The -1 here ensures that we leave enough space to draw the cursor
* when this function is used for horizontal scrolling.
*/
screen_right = screen.x + screen.width - 1;
screen_bottom = screen.y + screen.height;
/* The alignment affects the point in the target character that we
* choose to align. If we're doing right/bottom alignment, we align
* the right/bottom edge of the character the mark is at; if we're
* doing left/top we align the left/top edge of the character; if
* we're doing center alignment we align the center of the
* character.
*/
/* Vertical scroll */
scroll_inc = 0;
scroll_dest = current_y_scroll;
if (use_align)
{
scroll_dest = rect.y + (rect.height * yalign) - (screen.height * yalign);
/* if scroll_dest < screen.y, we move a negative increment (up),
* else a positive increment (down)
*/
scroll_inc = scroll_dest - screen.y + screen_yoffset;
}
else
{
/* move minimum to get onscreen */
if (rect.y < screen.y)
{
scroll_dest = rect.y;
scroll_inc = scroll_dest - screen.y - screen_yoffset;
}
else if ((rect.y + rect.height) > screen_bottom)
{
scroll_dest = rect.y + rect.height;
scroll_inc = scroll_dest - screen_bottom + screen_yoffset;
}
}
if (scroll_inc != 0)
{
retval = set_adjustment_clamped (get_vadjustment (text_view),
current_y_scroll + scroll_inc);
DV (g_print (" vert increment %d\n", scroll_inc));
}
/* Horizontal scroll */
scroll_inc = 0;
scroll_dest = current_x_scroll;
if (use_align)
{
scroll_dest = rect.x + (rect.width * xalign) - (screen.width * xalign);
/* if scroll_dest < screen.y, we move a negative increment (left),
* else a positive increment (right)
*/
scroll_inc = scroll_dest - screen.x + screen_xoffset;
}
else
{
/* move minimum to get onscreen */
if (rect.x < screen.x)
{
scroll_dest = rect.x;
scroll_inc = scroll_dest - screen.x - screen_xoffset;
}
else if ((rect.x + rect.width) > screen_right)
{
scroll_dest = rect.x + rect.width;
scroll_inc = scroll_dest - screen_right + screen_xoffset;
}
}
if (scroll_inc != 0)
{
retval = set_adjustment_clamped (get_hadjustment (text_view),
current_x_scroll + scroll_inc);
DV (g_print (" horiz increment %d\n", scroll_inc));
}
if (retval)
DV(g_print (">Actually scrolled ("G_STRLOC")\n"));
else
DV(g_print (">Didn't end up scrolling ("G_STRLOC")\n"));
return retval;
}
static void
free_pending_scroll (GtkTextPendingScroll *scroll)
{
if (!gtk_text_mark_get_deleted (scroll->mark))
gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (scroll->mark),
scroll->mark);
g_object_unref (scroll->mark);
g_free (scroll);
}
static void
cancel_pending_scroll (GtkTextView *text_view)
{
if (text_view->pending_scroll)
{
free_pending_scroll (text_view->pending_scroll);
text_view->pending_scroll = NULL;
}
}
static void
gtk_text_view_queue_scroll (GtkTextView *text_view,
GtkTextMark *mark,
gdouble within_margin,
gboolean use_align,
gdouble xalign,
gdouble yalign)
{
GtkTextIter iter;
GtkTextPendingScroll *scroll;
DV(g_print(G_STRLOC"\n"));
scroll = g_new (GtkTextPendingScroll, 1);
scroll->within_margin = within_margin;
scroll->use_align = use_align;
scroll->xalign = xalign;
scroll->yalign = yalign;
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
scroll->mark = gtk_text_buffer_create_mark (get_buffer (text_view),
NULL,
&iter,
gtk_text_mark_get_left_gravity (mark));
g_object_ref (scroll->mark);
cancel_pending_scroll (text_view);
text_view->pending_scroll = scroll;
}
static gboolean
gtk_text_view_flush_scroll (GtkTextView *text_view)
{
GtkTextIter iter;
GtkTextPendingScroll *scroll;
gboolean retval;
GtkWidget *widget;
widget = GTK_WIDGET (text_view);
DV(g_print(G_STRLOC"\n"));
if (text_view->pending_scroll == NULL)
{
DV (g_print ("in flush scroll, no pending scroll\n"));
return FALSE;
}
scroll = text_view->pending_scroll;
/* avoid recursion */
text_view->pending_scroll = NULL;
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, scroll->mark);
/* Validate area around the scroll destination, so the adjustment
* can meaningfully point into that area. We must validate
* enough area to be sure that after we scroll, everything onscreen
* is valid; otherwise, validation will maintain the first para
* in one place, but may push the target iter off the bottom of
* the screen.
*/
DV(g_print (">Validating scroll destination ("G_STRLOC")\n"));
gtk_text_layout_validate_yrange (text_view->layout, &iter,
- (widget->allocation.height * 2),
widget->allocation.height * 2);
DV(g_print (">Done validating scroll destination ("G_STRLOC")\n"));
/* Ensure we have updated width/height */
gtk_text_view_update_adjustments (text_view);
retval = gtk_text_view_scroll_to_iter (text_view,
&iter,
scroll->within_margin,
scroll->use_align,
scroll->xalign,
scroll->yalign);
free_pending_scroll (scroll);
return retval;
}
static void
gtk_text_view_set_adjustment_upper (GtkAdjustment *adj, gdouble upper)
{
if (upper != adj->upper)
{
gdouble min = MAX (0.0, upper - adj->page_size);
gboolean value_changed = FALSE;
adj->upper = upper;
if (adj->value > min)
{
adj->value = min;
value_changed = TRUE;
}
gtk_adjustment_changed (adj);
DV(g_print(">Changed adj upper to %g ("G_STRLOC")\n", upper));
if (value_changed)
{
DV(g_print(">Changed adj value because upper decreased ("G_STRLOC")\n"));
gtk_adjustment_value_changed (adj);
}
}
}
static void
gtk_text_view_update_adjustments (GtkTextView *text_view)
{
gint width = 0, height = 0;
DV(g_print(">Updating adjustments ("G_STRLOC")\n"));
if (text_view->layout)
gtk_text_layout_get_size (text_view->layout, &width, &height);
/* Make room for the cursor after the last character in the widest line */
width += SPACE_FOR_CURSOR;
if (text_view->width != width || text_view->height != height)
{
if (text_view->width != width)
text_view->width_changed = TRUE;
text_view->width = width;
text_view->height = height;
gtk_text_view_set_adjustment_upper (get_hadjustment (text_view),
MAX (SCREEN_WIDTH (text_view), width));
gtk_text_view_set_adjustment_upper (get_vadjustment (text_view),
MAX (SCREEN_HEIGHT (text_view), height));
/* hadj/vadj exist since we called get_hadjustment/get_vadjustment above */
/* Set up the step sizes; we'll say that a page is
our allocation minus one step, and a step is
1/10 of our allocation. */
text_view->hadjustment->step_increment =
SCREEN_WIDTH (text_view) / 10.0;
text_view->hadjustment->page_increment =
SCREEN_WIDTH (text_view) * 0.9;
text_view->vadjustment->step_increment =
SCREEN_HEIGHT (text_view) / 10.0;
text_view->vadjustment->page_increment =
SCREEN_HEIGHT (text_view) * 0.9;
gtk_adjustment_changed (get_hadjustment (text_view));
gtk_adjustment_changed (get_vadjustment (text_view));
}
}
static void
gtk_text_view_update_layout_width (GtkTextView *text_view)
{
DV(g_print(">Updating layout width ("G_STRLOC")\n"));
gtk_text_view_ensure_layout (text_view);
gtk_text_layout_set_screen_width (text_view->layout,
MAX (1, SCREEN_WIDTH (text_view) - SPACE_FOR_CURSOR));
}
static void
gtk_text_view_update_im_spot_location (GtkTextView *text_view)
{
GdkRectangle area;
if (text_view->layout == NULL)
return;
gtk_text_view_get_cursor_location (text_view, &area);
area.x -= text_view->xoffset;
area.y -= text_view->yoffset;
/* Width returned by Pango indicates direction of cursor,
* by it's sign more than the size of cursor.
*/
area.width = 0;
gtk_im_context_set_cursor_location (text_view->im_context, &area);
}
/**
* gtk_text_view_scroll_to_mark:
* @text_view: a #GtkTextView
* @mark: a #GtkTextMark
* @within_margin: margin as a [0.0,0.5) fraction of screen size
* @use_align: whether to use alignment arguments (if %FALSE, just get the mark onscreen)
* @xalign: horizontal alignment of mark within visible area.
* @yalign: vertical alignment of mark within visible area
*
* Scrolls @text_view so that @mark is on the screen in the position
* indicated by @xalign and @yalign. An alignment of 0.0 indicates
* left or top, 1.0 indicates right or bottom, 0.5 means center. If @use_align
* is %FALSE, the text scrolls the minimal distance to get the mark onscreen,
* possibly not scrolling at all. The effective screen for purposes
* of this function is reduced by a margin of size @within_margin.
*
**/
void
gtk_text_view_scroll_to_mark (GtkTextView *text_view,
GtkTextMark *mark,
gdouble within_margin,
gboolean use_align,
gdouble xalign,
gdouble yalign)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
g_return_if_fail (GTK_IS_TEXT_MARK (mark));
g_return_if_fail (within_margin >= 0.0 && within_margin < 0.5);
g_return_if_fail (xalign >= 0.0 && xalign <= 1.0);
g_return_if_fail (yalign >= 0.0 && yalign <= 1.0);
gtk_text_view_queue_scroll (text_view, mark,
within_margin,
use_align,
xalign,
yalign);
/* If no validation is pending, we need to go ahead and force an
* immediate scroll.
*/
if (text_view->layout &&
gtk_text_layout_is_valid (text_view->layout))
gtk_text_view_flush_scroll (text_view);
}
/**
* gtk_text_view_scroll_mark_onscreen:
* @text_view: a #GtkTextView
* @mark: a mark in the buffer for @text_view
*
* Scrolls @text_view the minimum distance such that @mark is contained
* within the visible area of the widget.
*
**/
void
gtk_text_view_scroll_mark_onscreen (GtkTextView *text_view,
GtkTextMark *mark)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
g_return_if_fail (GTK_IS_TEXT_MARK (mark));
gtk_text_view_scroll_to_mark (text_view, mark, 0.0, FALSE, 0.0, 0.0);
}
static gboolean
clamp_iter_onscreen (GtkTextView *text_view, GtkTextIter *iter)
{
GdkRectangle visible_rect;
gtk_text_view_get_visible_rect (text_view, &visible_rect);
return gtk_text_layout_clamp_iter_to_vrange (text_view->layout, iter,
visible_rect.y,
visible_rect.y + visible_rect.height);
}
/**
* gtk_text_view_move_mark_onscreen:
* @text_view: a #GtkTextView
* @mark: a #GtkTextMark
*
* Moves a mark within the buffer so that it's
* located within the currently-visible text area.
*
* Return value: %TRUE if the mark moved (wasn't already onscreen)
**/
gboolean
gtk_text_view_move_mark_onscreen (GtkTextView *text_view,
GtkTextMark *mark)
{
GtkTextIter iter;
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
g_return_val_if_fail (mark != NULL, FALSE);
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, mark);
if (clamp_iter_onscreen (text_view, &iter))
{
gtk_text_buffer_move_mark (get_buffer (text_view), mark, &iter);
return TRUE;
}
else
return FALSE;
}
/**
* gtk_text_view_get_visible_rect:
* @text_view: a #GtkTextView
* @visible_rect: rectangle to fill
*
* Fills @visible_rect with the currently-visible
* region of the buffer, in buffer coordinates. Convert to window coordinates
* with gtk_text_view_buffer_to_window_coords().
**/
void
gtk_text_view_get_visible_rect (GtkTextView *text_view,
GdkRectangle *visible_rect)
{
GtkWidget *widget;
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
widget = GTK_WIDGET (text_view);
if (visible_rect)
{
visible_rect->x = text_view->xoffset;
visible_rect->y = text_view->yoffset;
visible_rect->width = SCREEN_WIDTH (widget);
visible_rect->height = SCREEN_HEIGHT (widget);
DV(g_print(" visible rect: %d,%d %d x %d\n",
visible_rect->x,
visible_rect->y,
visible_rect->width,
visible_rect->height));
}
}
/**
* gtk_text_view_set_wrap_mode:
* @text_view: a #GtkTextView
* @wrap_mode: a #GtkWrapMode
*
* Sets the line wrapping for the view.
**/
void
gtk_text_view_set_wrap_mode (GtkTextView *text_view,
GtkWrapMode wrap_mode)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
if (text_view->wrap_mode != wrap_mode)
{
text_view->wrap_mode = wrap_mode;
if (text_view->layout)
{
text_view->layout->default_style->wrap_mode = wrap_mode;
gtk_text_layout_default_style_changed (text_view->layout);
}
}
g_object_notify (G_OBJECT (text_view), "wrap-mode");
}
/**
* gtk_text_view_get_wrap_mode:
* @text_view: a #GtkTextView
*
* Gets the line wrapping for the view.
*
* Return value: the line wrap setting
**/
GtkWrapMode
gtk_text_view_get_wrap_mode (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_WRAP_NONE);
return text_view->wrap_mode;
}
/**
* gtk_text_view_set_editable:
* @text_view: a #GtkTextView
* @setting: whether it's editable
*
* Sets the default editability of the #GtkTextView. You can override
* this default setting with tags in the buffer, using the "editable"
* attribute of tags.
**/
void
gtk_text_view_set_editable (GtkTextView *text_view,
gboolean setting)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
setting = setting != FALSE;
if (text_view->editable != setting)
{
text_view->editable = setting;
if (text_view->layout)
{
text_view->layout->default_style->editable = text_view->editable;
gtk_text_layout_default_style_changed (text_view->layout);
}
g_object_notify (G_OBJECT (text_view), "editable");
}
}
/**
* gtk_text_view_get_editable:
* @text_view: a #GtkTextView
*
* Returns the default editability of the #GtkTextView. Tags in the
* buffer may override this setting for some ranges of text.
*
* Return value: whether text is editable by default
**/
gboolean
gtk_text_view_get_editable (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
return text_view->editable;
}
/**
* gtk_text_view_set_pixels_above_lines:
* @text_view: a #GtkTextView
* @pixels_above_lines: pixels above paragraphs
*
* Sets the default number of blank pixels above paragraphs in @text_view.
* Tags in the buffer for @text_view may override the defaults.
*
**/
void
gtk_text_view_set_pixels_above_lines (GtkTextView *text_view,
gint pixels_above_lines)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
if (text_view->pixels_above_lines != pixels_above_lines)
{
text_view->pixels_above_lines = pixels_above_lines;
if (text_view->layout)
{
text_view->layout->default_style->pixels_above_lines = pixels_above_lines;
gtk_text_layout_default_style_changed (text_view->layout);
}
g_object_notify (G_OBJECT (text_view), "pixels-above-lines");
}
}
/**
* gtk_text_view_get_pixels_above_lines:
* @text_view: a #GtkTextView
*
* Gets the default number of pixels to put above paragraphs.
*
* Return value: default number of pixels above paragraphs
**/
gint
gtk_text_view_get_pixels_above_lines (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
return text_view->pixels_above_lines;
}
/**
* gtk_text_view_set_pixels_below_lines:
* @text_view: a #GtkTextView
* @pixels_below_lines: pixels below paragraphs
*
* Sets the default number of pixels of blank space
* to put below paragraphs in @text_view. May be overridden
* by tags applied to @text_view's buffer.
*
**/
void
gtk_text_view_set_pixels_below_lines (GtkTextView *text_view,
gint pixels_below_lines)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
if (text_view->pixels_below_lines != pixels_below_lines)
{
text_view->pixels_below_lines = pixels_below_lines;
if (text_view->layout)
{
text_view->layout->default_style->pixels_below_lines = pixels_below_lines;
gtk_text_layout_default_style_changed (text_view->layout);
}
g_object_notify (G_OBJECT (text_view), "pixels-below-lines");
}
}
/**
* gtk_text_view_get_pixels_below_lines:
* @text_view: a #GtkTextView
*
* Gets the value set by gtk_text_view_set_pixels_below_lines().
*
* Return value: default number of blank pixels below paragraphs
**/
gint
gtk_text_view_get_pixels_below_lines (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
return text_view->pixels_below_lines;
}
/**
* gtk_text_view_set_pixels_inside_wrap:
* @text_view: a #GtkTextView
* @pixels_inside_wrap: default number of pixels between wrapped lines
*
* Sets the default number of pixels of blank space to leave between
* display/wrapped lines within a paragraph. May be overridden by
* tags in @text_view's buffer.
*
**/
void
gtk_text_view_set_pixels_inside_wrap (GtkTextView *text_view,
gint pixels_inside_wrap)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
if (text_view->pixels_inside_wrap != pixels_inside_wrap)
{
text_view->pixels_inside_wrap = pixels_inside_wrap;
if (text_view->layout)
{
text_view->layout->default_style->pixels_inside_wrap = pixels_inside_wrap;
gtk_text_layout_default_style_changed (text_view->layout);
}
g_object_notify (G_OBJECT (text_view), "pixels-inside-wrap");
}
}
/**
* gtk_text_view_get_pixels_inside_wrap:
* @text_view: a #GtkTextView
*
* Gets the value set by gtk_text_view_set_pixels_inside_wrap().
*
* Return value: default number of pixels of blank space between wrapped lines
**/
gint
gtk_text_view_get_pixels_inside_wrap (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
return text_view->pixels_inside_wrap;
}
/**
* gtk_text_view_set_justification:
* @text_view: a #GtkTextView
* @justification: justification
*
* Sets the default justification of text in @text_view.
* Tags in the view's buffer may override the default.
*
**/
void
gtk_text_view_set_justification (GtkTextView *text_view,
GtkJustification justification)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
if (text_view->justify != justification)
{
text_view->justify = justification;
if (text_view->layout)
{
text_view->layout->default_style->justification = justification;
gtk_text_layout_default_style_changed (text_view->layout);
}
g_object_notify (G_OBJECT (text_view), "justification");
}
}
/**
* gtk_text_view_get_justification:
* @text_view: a #GtkTextView
*
* Gets the default justification of paragraphs in @text_view.
* Tags in the buffer may override the default.
*
* Return value: default justification
**/
GtkJustification
gtk_text_view_get_justification (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), GTK_JUSTIFY_LEFT);
return text_view->justify;
}
/**
* gtk_text_view_set_left_margin:
* @text_view: a #GtkTextView
* @left_margin: left margin in pixels
*
* Sets the default left margin for text in @text_view.
* Tags in the buffer may override the default.
*
**/
void
gtk_text_view_set_left_margin (GtkTextView *text_view,
gint left_margin)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
if (text_view->left_margin != left_margin)
{
text_view->left_margin = left_margin;
if (text_view->layout)
{
text_view->layout->default_style->left_margin = left_margin;
gtk_text_layout_default_style_changed (text_view->layout);
}
g_object_notify (G_OBJECT (text_view), "left-margin");
}
}
/**
* gtk_text_view_get_left_margin:
* @text_view: a #GtkTextView
*
* Gets the default left margin size of paragraphs in the @text_view.
* Tags in the buffer may override the default.
*
* Return value: left margin in pixels
**/
gint
gtk_text_view_get_left_margin (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
return text_view->left_margin;
}
/**
* gtk_text_view_set_right_margin:
* @text_view: a #GtkTextView
* @right_margin: right margin in pixels
*
* Sets the default right margin for text in the text view.
* Tags in the buffer may override the default.
*
**/
void
gtk_text_view_set_right_margin (GtkTextView *text_view,
gint right_margin)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
if (text_view->right_margin != right_margin)
{
text_view->right_margin = right_margin;
if (text_view->layout)
{
text_view->layout->default_style->right_margin = right_margin;
gtk_text_layout_default_style_changed (text_view->layout);
}
g_object_notify (G_OBJECT (text_view), "right-margin");
}
}
/**
* gtk_text_view_get_right_margin:
* @text_view: a #GtkTextView
*
* Gets the default right margin for text in @text_view. Tags
* in the buffer may override the default.
*
* Return value: right margin in pixels
**/
gint
gtk_text_view_get_right_margin (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
return text_view->right_margin;
}
/**
* gtk_text_view_set_indent:
* @text_view: a #GtkTextView
* @indent: indentation in pixels
*
* Sets the default indentation for paragraphs in @text_view.
* Tags in the buffer may override the default.
*
**/
void
gtk_text_view_set_indent (GtkTextView *text_view,
gint indent)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
if (text_view->indent != indent)
{
text_view->indent = indent;
if (text_view->layout)
{
text_view->layout->default_style->indent = indent;
gtk_text_layout_default_style_changed (text_view->layout);
}
g_object_notify (G_OBJECT (text_view), "indent");
}
}
/**
* gtk_text_view_get_indent:
* @text_view: a #GtkTextView
*
* Gets the default indentation of paragraphs in @text_view.
* Tags in the view's buffer may override the default.
* The indentation may be negative.
*
* Return value: number of pixels of indentation
**/
gint
gtk_text_view_get_indent (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
return text_view->indent;
}
/**
* gtk_text_view_set_tabs:
* @text_view: a #GtkTextView
* @tabs: tabs as a #PangoTabArray
*
* Sets the default tab stops for paragraphs in @text_view.
* Tags in the buffer may override the default.
*
**/
void
gtk_text_view_set_tabs (GtkTextView *text_view,
PangoTabArray *tabs)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
if (text_view->tabs)
pango_tab_array_free (text_view->tabs);
text_view->tabs = tabs ? pango_tab_array_copy (tabs) : NULL;
if (text_view->layout)
{
/* some unkosher futzing in internal struct details... */
if (text_view->layout->default_style->tabs)
pango_tab_array_free (text_view->layout->default_style->tabs);
text_view->layout->default_style->tabs =
text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
gtk_text_layout_default_style_changed (text_view->layout);
}
g_object_notify (G_OBJECT (text_view), "tabs");
}
/**
* gtk_text_view_get_tabs:
* @text_view: a #GtkTextView
*
* Gets the default tabs for @text_view. Tags in the buffer may
* override the defaults. The returned array will be %NULL if
* "standard" (8-space) tabs are used. Free the return value
* with pango_tab_array_free().
*
* Return value: copy of default tab array, or %NULL if "standard" tabs are used; must be freed with pango_tab_array_free().
**/
PangoTabArray*
gtk_text_view_get_tabs (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
return text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
}
/**
* gtk_text_view_set_cursor_visible:
* @text_view: a #GtkTextView
* @setting: whether to show the insertion cursor
*
* Toggles whether the insertion point is displayed. A buffer with no editable
* text probably shouldn't have a visible cursor, so you may want to turn
* the cursor off.
**/
void
gtk_text_view_set_cursor_visible (GtkTextView *text_view,
gboolean setting)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
setting = (setting != FALSE);
if (text_view->cursor_visible != setting)
{
text_view->cursor_visible = setting;
if (GTK_WIDGET_HAS_FOCUS (text_view))
{
if (text_view->layout)
{
gtk_text_layout_set_cursor_visible (text_view->layout, setting);
gtk_text_view_check_cursor_blink (text_view);
}
}
g_object_notify (G_OBJECT (text_view), "cursor-visible");
}
}
/**
* gtk_text_view_get_cursor_visible:
* @text_view: a #GtkTextView
*
* Find out whether the cursor is being displayed.
*
* Return value: whether the insertion mark is visible
**/
gboolean
gtk_text_view_get_cursor_visible (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
return text_view->cursor_visible;
}
/**
* gtk_text_view_place_cursor_onscreen:
* @text_view: a #GtkTextView
*
* Moves the cursor to the currently visible region of the
* buffer, it it isn't there already.
*
* Return value: TRUE if the cursor had to be moved.
**/
gboolean
gtk_text_view_place_cursor_onscreen (GtkTextView *text_view)
{
GtkTextIter insert;
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
if (clamp_iter_onscreen (text_view, &insert))
{
gtk_text_buffer_place_cursor (get_buffer (text_view), &insert);
return TRUE;
}
else
return FALSE;
}
static void
gtk_text_view_remove_validate_idles (GtkTextView *text_view)
{
if (text_view->first_validate_idle != 0)
{
DV (g_print ("Removing first validate idle: %s\n", G_STRLOC));
g_source_remove (text_view->first_validate_idle);
text_view->first_validate_idle = 0;
}
if (text_view->incremental_validate_idle != 0)
{
g_source_remove (text_view->incremental_validate_idle);
text_view->incremental_validate_idle = 0;
}
}
static void
gtk_text_view_destroy (GtkObject *object)
{
GtkTextView *text_view;
text_view = GTK_TEXT_VIEW (object);
gtk_text_view_remove_validate_idles (text_view);
gtk_text_view_set_buffer (text_view, NULL);
gtk_text_view_destroy_layout (text_view);
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void
gtk_text_view_finalize (GObject *object)
{
GtkTextView *text_view;
text_view = GTK_TEXT_VIEW (object);
g_assert (text_view->buffer == NULL);
gtk_text_view_destroy_layout (text_view);
gtk_text_view_set_buffer (text_view, NULL);
cancel_pending_scroll (text_view);
if (text_view->tabs)
pango_tab_array_free (text_view->tabs);
if (text_view->hadjustment)
g_object_unref (text_view->hadjustment);
if (text_view->vadjustment)
g_object_unref (text_view->vadjustment);
text_window_free (text_view->text_window);
if (text_view->left_window)
text_window_free (text_view->left_window);
if (text_view->top_window)
text_window_free (text_view->top_window);
if (text_view->right_window)
text_window_free (text_view->right_window);
if (text_view->bottom_window)
text_window_free (text_view->bottom_window);
g_object_unref (text_view->im_context);
(* G_OBJECT_CLASS (parent_class)->finalize) (object);
}
static void
gtk_text_view_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkTextView *text_view;
text_view = GTK_TEXT_VIEW (object);
switch (prop_id)
{
case PROP_PIXELS_ABOVE_LINES:
gtk_text_view_set_pixels_above_lines (text_view, g_value_get_int (value));
break;
case PROP_PIXELS_BELOW_LINES:
gtk_text_view_set_pixels_below_lines (text_view, g_value_get_int (value));
break;
case PROP_PIXELS_INSIDE_WRAP:
gtk_text_view_set_pixels_inside_wrap (text_view, g_value_get_int (value));
break;
case PROP_EDITABLE:
gtk_text_view_set_editable (text_view, g_value_get_boolean (value));
break;
case PROP_WRAP_MODE:
gtk_text_view_set_wrap_mode (text_view, g_value_get_enum (value));
break;
case PROP_JUSTIFICATION:
gtk_text_view_set_justification (text_view, g_value_get_enum (value));
break;
case PROP_LEFT_MARGIN:
gtk_text_view_set_left_margin (text_view, g_value_get_int (value));
break;
case PROP_RIGHT_MARGIN:
gtk_text_view_set_right_margin (text_view, g_value_get_int (value));
break;
case PROP_INDENT:
gtk_text_view_set_indent (text_view, g_value_get_int (value));
break;
case PROP_TABS:
gtk_text_view_set_tabs (text_view, g_value_get_boxed (value));
break;
case PROP_CURSOR_VISIBLE:
gtk_text_view_set_cursor_visible (text_view, g_value_get_boolean (value));
break;
case PROP_OVERWRITE:
gtk_text_view_set_overwrite (text_view, g_value_get_boolean (value));
break;
case PROP_BUFFER:
gtk_text_view_set_buffer (text_view, GTK_TEXT_BUFFER (g_value_get_object (value)));
break;
case PROP_ACCEPTS_TAB:
gtk_text_view_set_accepts_tab (text_view, g_value_get_boolean (value));
break;
default:
g_assert_not_reached ();
break;
}
}
static void
gtk_text_view_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkTextView *text_view;
text_view = GTK_TEXT_VIEW (object);
switch (prop_id)
{
case PROP_PIXELS_ABOVE_LINES:
g_value_set_int (value, text_view->pixels_above_lines);
break;
case PROP_PIXELS_BELOW_LINES:
g_value_set_int (value, text_view->pixels_below_lines);
break;
case PROP_PIXELS_INSIDE_WRAP:
g_value_set_int (value, text_view->pixels_inside_wrap);
break;
case PROP_EDITABLE:
g_value_set_boolean (value, text_view->editable);
break;
case PROP_WRAP_MODE:
g_value_set_enum (value, text_view->wrap_mode);
break;
case PROP_JUSTIFICATION:
g_value_set_enum (value, text_view->justify);
break;
case PROP_LEFT_MARGIN:
g_value_set_int (value, text_view->left_margin);
break;
case PROP_RIGHT_MARGIN:
g_value_set_int (value, text_view->right_margin);
break;
case PROP_INDENT:
g_value_set_int (value, text_view->indent);
break;
case PROP_TABS:
g_value_set_boxed (value, text_view->tabs);
break;
case PROP_CURSOR_VISIBLE:
g_value_set_boolean (value, text_view->cursor_visible);
break;
case PROP_BUFFER:
g_value_set_object (value, get_buffer (text_view));
break;
case PROP_OVERWRITE:
g_value_set_boolean (value, text_view->overwrite_mode);
break;
case PROP_ACCEPTS_TAB:
g_value_set_boolean (value, text_view->accepts_tab);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_text_view_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkTextView *text_view;
GSList *tmp_list;
gint focus_edge_width;
gint focus_width;
gboolean interior_focus;
text_view = GTK_TEXT_VIEW (widget);
gtk_widget_style_get (widget,
"interior-focus", &interior_focus,
"focus-line-width", &focus_width,
NULL);
if (interior_focus)
focus_edge_width = 0;
else
focus_edge_width = focus_width;
if (text_view->layout)
{
text_view->text_window->requisition.width = text_view->layout->width;
text_view->text_window->requisition.height = text_view->layout->height;
}
else
{
text_view->text_window->requisition.width = 0;
text_view->text_window->requisition.height = 0;
}
requisition->width = text_view->text_window->requisition.width + focus_edge_width * 2;
requisition->height = text_view->text_window->requisition.height + focus_edge_width * 2;
if (text_view->left_window)
requisition->width += text_view->left_window->requisition.width;
if (text_view->right_window)
requisition->width += text_view->right_window->requisition.width;
if (text_view->top_window)
requisition->height += text_view->top_window->requisition.height;
if (text_view->bottom_window)
requisition->height += text_view->bottom_window->requisition.height;
requisition->width += GTK_CONTAINER (text_view)->border_width * 2;
requisition->height += GTK_CONTAINER (text_view)->border_width * 2;
tmp_list = text_view->children;
while (tmp_list != NULL)
{
GtkTextViewChild *child = tmp_list->data;
if (child->anchor)
{
GtkRequisition child_req;
GtkRequisition old_req;
gtk_widget_get_child_requisition (child->widget, &old_req);
gtk_widget_size_request (child->widget, &child_req);
gtk_widget_get_child_requisition (child->widget, &child_req);
/* Invalidate layout lines if required */
if (text_view->layout &&
(old_req.width != child_req.width ||
old_req.height != child_req.height))
gtk_text_child_anchor_queue_resize (child->anchor,
text_view->layout);
}
else
{
GtkRequisition child_req;
gtk_widget_size_request (child->widget, &child_req);
}
tmp_list = g_slist_next (tmp_list);
}
}
static void
gtk_text_view_compute_child_allocation (GtkTextView *text_view,
GtkTextViewChild *vc,
GtkAllocation *allocation)
{
gint buffer_y;
GtkTextIter iter;
GtkRequisition req;
gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
&iter,
vc->anchor);
gtk_text_layout_get_line_yrange (text_view->layout, &iter,
&buffer_y, NULL);
buffer_y += vc->from_top_of_line;
allocation->x = vc->from_left_of_buffer - text_view->xoffset;
allocation->y = buffer_y - text_view->yoffset;
gtk_widget_get_child_requisition (vc->widget, &req);
allocation->width = req.width;
allocation->height = req.height;
}
static void
gtk_text_view_update_child_allocation (GtkTextView *text_view,
GtkTextViewChild *vc)
{
GtkAllocation allocation;
gtk_text_view_compute_child_allocation (text_view, vc, &allocation);
gtk_widget_size_allocate (vc->widget, &allocation);
#if 0
g_print ("allocation for %p allocated to %d,%d yoffset = %d\n",
vc->widget,
vc->widget->allocation.x,
vc->widget->allocation.y,
text_view->yoffset);
#endif
}
static void
gtk_text_view_child_allocated (GtkTextLayout *layout,
GtkWidget *child,
gint x,
gint y,
gpointer data)
{
GtkTextViewChild *vc = NULL;
GtkTextView *text_view = data;
/* x,y is the position of the child from the top of the line, and
* from the left of the buffer. We have to translate that into text
* window coordinates, then size_allocate the child.
*/
vc = g_object_get_data (G_OBJECT (child),
"gtk-text-view-child");
g_assert (vc != NULL);
DV (g_print ("child allocated at %d,%d\n", x, y));
vc->from_left_of_buffer = x;
vc->from_top_of_line = y;
gtk_text_view_update_child_allocation (text_view, vc);
}
static void
gtk_text_view_allocate_children (GtkTextView *text_view)
{
GSList *tmp_list;
DV(g_print(G_STRLOC"\n"));
tmp_list = text_view->children;
while (tmp_list != NULL)
{
GtkTextViewChild *child = tmp_list->data;
if (child->anchor)
{
/* We need to force-validate the regions containing
* children.
*/
GtkTextIter child_loc;
gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
&child_loc,
child->anchor);
/* Since anchored children are only ever allocated from
* gtk_text_layout_get_line_display() we have to make sure
* that the display line caching in the layout doesn't
* get in the way. Invalidating the layout around the anchor
* achieves this.
*/
if (GTK_WIDGET_ALLOC_NEEDED (child->widget))
{
GtkTextIter end = child_loc;
gtk_text_iter_forward_char (&end);
gtk_text_layout_invalidate (text_view->layout, &child_loc, &end);
}
gtk_text_layout_validate_yrange (text_view->layout,
&child_loc,
0, 1);
}
else
{
GtkAllocation allocation;
GtkRequisition child_req;
g_assert (child != NULL);
allocation.x = child->x;
allocation.y = child->y;
gtk_widget_get_child_requisition (child->widget, &child_req);
allocation.width = child_req.width;
allocation.height = child_req.height;
gtk_widget_size_allocate (child->widget, &allocation);
}
tmp_list = g_slist_next (tmp_list);
}
}
static void
gtk_text_view_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkTextView *text_view;
GtkTextIter first_para;
gint y;
gint width, height;
GdkRectangle text_rect;
GdkRectangle left_rect;
GdkRectangle right_rect;
GdkRectangle top_rect;
GdkRectangle bottom_rect;
gint focus_edge_width;
gint focus_width;
gboolean interior_focus;
gboolean size_changed;
text_view = GTK_TEXT_VIEW (widget);
DV(g_print(G_STRLOC"\n"));
size_changed =
widget->allocation.width != allocation->width ||
widget->allocation.height != allocation->height;
widget->allocation = *allocation;
if (GTK_WIDGET_REALIZED (widget))
{
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height);
}
/* distribute width/height among child windows. Ensure all
* windows get at least a 1x1 allocation.
*/
gtk_widget_style_get (widget,
"interior-focus", &interior_focus,
"focus-line-width", &focus_width,
NULL);
if (interior_focus)
focus_edge_width = 0;
else
focus_edge_width = focus_width;
width = allocation->width - focus_edge_width * 2 - GTK_CONTAINER (text_view)->border_width * 2;
if (text_view->left_window)
left_rect.width = text_view->left_window->requisition.width;
else
left_rect.width = 0;
width -= left_rect.width;
if (text_view->right_window)
right_rect.width = text_view->right_window->requisition.width;
else
right_rect.width = 0;
width -= right_rect.width;
text_rect.width = MAX (1, width);
top_rect.width = text_rect.width;
bottom_rect.width = text_rect.width;
height = allocation->height - focus_edge_width * 2 - GTK_CONTAINER (text_view)->border_width * 2;
if (text_view->top_window)
top_rect.height = text_view->top_window->requisition.height;
else
top_rect.height = 0;
height -= top_rect.height;
if (text_view->bottom_window)
bottom_rect.height = text_view->bottom_window->requisition.height;
else
bottom_rect.height = 0;
height -= bottom_rect.height;
text_rect.height = MAX (1, height);
left_rect.height = text_rect.height;
right_rect.height = text_rect.height;
/* Origins */
left_rect.x = focus_edge_width + GTK_CONTAINER (text_view)->border_width;
top_rect.y = focus_edge_width + GTK_CONTAINER (text_view)->border_width;
text_rect.x = left_rect.x + left_rect.width;
text_rect.y = top_rect.y + top_rect.height;
left_rect.y = text_rect.y;
right_rect.y = text_rect.y;
top_rect.x = text_rect.x;
bottom_rect.x = text_rect.x;
right_rect.x = text_rect.x + text_rect.width;
bottom_rect.y = text_rect.y + text_rect.height;
text_window_size_allocate (text_view->text_window,
&text_rect);
if (text_view->left_window)
text_window_size_allocate (text_view->left_window,
&left_rect);
if (text_view->right_window)
text_window_size_allocate (text_view->right_window,
&right_rect);
if (text_view->top_window)
text_window_size_allocate (text_view->top_window,
&top_rect);
if (text_view->bottom_window)
text_window_size_allocate (text_view->bottom_window,
&bottom_rect);
gtk_text_view_update_layout_width (text_view);
/* Note that this will do some layout validation */
gtk_text_view_allocate_children (text_view);
/* Ensure h/v adj exist */
get_hadjustment (text_view);
get_vadjustment (text_view);
text_view->hadjustment->page_size = SCREEN_WIDTH (text_view);
text_view->hadjustment->page_increment = SCREEN_WIDTH (text_view) * 0.9;
text_view->hadjustment->step_increment = SCREEN_WIDTH (text_view) * 0.1;
text_view->hadjustment->lower = 0;
text_view->hadjustment->upper = MAX (SCREEN_WIDTH (text_view),
text_view->width);
if (text_view->hadjustment->value > text_view->hadjustment->upper - text_view->hadjustment->page_size)
gtk_adjustment_set_value (text_view->hadjustment, MAX (0, text_view->hadjustment->upper - text_view->hadjustment->page_size));
gtk_adjustment_changed (text_view->hadjustment);
text_view->vadjustment->page_size = SCREEN_HEIGHT (text_view);
text_view->vadjustment->page_increment = SCREEN_HEIGHT (text_view) * 0.9;
text_view->vadjustment->step_increment = SCREEN_HEIGHT (text_view) * 0.1;
text_view->vadjustment->lower = 0;
text_view->vadjustment->upper = MAX (SCREEN_HEIGHT (text_view),
text_view->height);
/* Now adjust the value of the adjustment to keep the cursor at the
* same place in the buffer
*/
gtk_text_view_get_first_para_iter (text_view, &first_para);
gtk_text_layout_get_line_yrange (text_view->layout, &first_para, &y, NULL);
y += text_view->first_para_pixels;
if (y > text_view->vadjustment->upper - text_view->vadjustment->page_size)
y = MAX (0, text_view->vadjustment->upper - text_view->vadjustment->page_size);
if (y != text_view->yoffset)
gtk_adjustment_set_value (text_view->vadjustment, y);
gtk_adjustment_changed (text_view->vadjustment);
/* The GTK resize loop processes all the pending exposes right
* after doing the resize stuff, so the idle sizer won't have a
* chance to run. So we do the work here.
*/
gtk_text_view_flush_first_validate (text_view);
/* widget->window doesn't get auto-redrawn as the layout is computed, so has to
* be invalidated
*/
if (size_changed && GTK_WIDGET_REALIZED (widget))
gdk_window_invalidate_rect (widget->window, NULL, FALSE);
}
static void
gtk_text_view_get_first_para_iter (GtkTextView *text_view,
GtkTextIter *iter)
{
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), iter,
text_view->first_para_mark);
}
static void
gtk_text_view_validate_onscreen (GtkTextView *text_view)
{
GtkWidget *widget = GTK_WIDGET (text_view);
DV(g_print(">Validating onscreen ("G_STRLOC")\n"));
if (SCREEN_HEIGHT (widget) > 0)
{
GtkTextIter first_para;
/* Be sure we've validated the stuff onscreen; if we
* scrolled, these calls won't have any effect, because
* they were called in the recursive validate_onscreen
*/
gtk_text_view_get_first_para_iter (text_view, &first_para);
gtk_text_layout_validate_yrange (text_view->layout,
&first_para,
0,
text_view->first_para_pixels +
SCREEN_HEIGHT (widget));
}
text_view->onscreen_validated = TRUE;
DV(g_print(">Done validating onscreen, onscreen_validated = TRUE ("G_STRLOC")\n"));
/* This can have the odd side effect of triggering a scroll, which should
* flip "onscreen_validated" back to FALSE, but should also get us
* back into this function to turn it on again.
*/
gtk_text_view_update_adjustments (text_view);
g_assert (text_view->onscreen_validated);
}
static void
gtk_text_view_flush_first_validate (GtkTextView *text_view)
{
if (text_view->first_validate_idle == 0)
return;
/* Do this first, which means that if an "invalidate"
* occurs during any of this process, a new first_validate_callback
* will be installed, and we'll start again.
*/
DV (g_print ("removing first validate in %s\n", G_STRLOC));
g_source_remove (text_view->first_validate_idle);
text_view->first_validate_idle = 0;
/* be sure we have up-to-date screen size set on the
* layout.
*/
gtk_text_view_update_layout_width (text_view);
/* Bail out if we invalidated stuff; scrolling right away will just
* confuse the issue.
*/
if (text_view->first_validate_idle != 0)
{
DV(g_print(">Width change forced requeue ("G_STRLOC")\n"));
}
else
{
/* scroll to any marks, if that's pending. This can jump us to
* the validation codepath used for scrolling onscreen, if so we
* bail out. It won't jump if already in that codepath since
* value_changed is not recursive, so also validate if
* necessary.
*/
if (!gtk_text_view_flush_scroll (text_view) ||
!text_view->onscreen_validated)
gtk_text_view_validate_onscreen (text_view);
DV(g_print(">Leaving first validate idle ("G_STRLOC")\n"));
g_assert (text_view->onscreen_validated);
}
}
static gboolean
first_validate_callback (gpointer data)
{
GtkTextView *text_view = data;
GDK_THREADS_ENTER ();
/* Note that some of this code is duplicated at the end of size_allocate,
* keep in sync with that.
*/
DV(g_print(G_STRLOC"\n"));
gtk_text_view_flush_first_validate (text_view);
GDK_THREADS_LEAVE ();
return FALSE;
}
static gboolean
incremental_validate_callback (gpointer data)
{
GtkTextView *text_view = data;
gboolean result = TRUE;
GDK_THREADS_ENTER ();
DV(g_print(G_STRLOC"\n"));
gtk_text_layout_validate (text_view->layout, 2000);
gtk_text_view_update_adjustments (text_view);
if (gtk_text_layout_is_valid (text_view->layout))
{
text_view->incremental_validate_idle = 0;
result = FALSE;
}
GDK_THREADS_LEAVE ();
return result;
}
static void
gtk_text_view_invalidate (GtkTextView *text_view)
{
DV (g_print (">Invalidate, onscreen_validated = %d now FALSE ("G_STRLOC")\n",
text_view->onscreen_validated));
text_view->onscreen_validated = FALSE;
/* We'll invalidate when the layout is created */
if (text_view->layout == NULL)
return;
if (!text_view->first_validate_idle)
{
text_view->first_validate_idle = g_idle_add_full (GTK_PRIORITY_RESIZE - 2, first_validate_callback, text_view, NULL);
DV (g_print (G_STRLOC": adding first validate idle %d\n",
text_view->first_validate_idle));
}
if (!text_view->incremental_validate_idle)
{
text_view->incremental_validate_idle = g_idle_add_full (GTK_TEXT_VIEW_PRIORITY_VALIDATE, incremental_validate_callback, text_view, NULL);
DV (g_print (G_STRLOC": adding incremental validate idle %d\n",
text_view->incremental_validate_idle));
}
}
static void
invalidated_handler (GtkTextLayout *layout,
gpointer data)
{
GtkTextView *text_view;
text_view = GTK_TEXT_VIEW (data);
DV (g_print ("Invalidating due to layout invalidate signal\n"));
gtk_text_view_invalidate (text_view);
}
static void
changed_handler (GtkTextLayout *layout,
gint start_y,
gint old_height,
gint new_height,
gpointer data)
{
GtkTextView *text_view;
GtkWidget *widget;
GdkRectangle visible_rect;
GdkRectangle redraw_rect;
text_view = GTK_TEXT_VIEW (data);
widget = GTK_WIDGET (data);
DV(g_print(">Lines Validated ("G_STRLOC")\n"));
if (GTK_WIDGET_REALIZED (text_view))
{
gtk_text_view_get_visible_rect (text_view, &visible_rect);
redraw_rect.x = visible_rect.x;
redraw_rect.width = visible_rect.width;
redraw_rect.y = start_y;
if (old_height == new_height)
redraw_rect.height = old_height;
else if (start_y + old_height > visible_rect.y)
redraw_rect.height = MAX (0, visible_rect.y + visible_rect.height - start_y);
else
redraw_rect.height = 0;
if (gdk_rectangle_intersect (&redraw_rect, &visible_rect, &redraw_rect))
{
/* text_window_invalidate_rect() takes buffer coordinates */
text_window_invalidate_rect (text_view->text_window,
&redraw_rect);
DV(g_print(" invalidated rect: %d,%d %d x %d\n",
redraw_rect.x,
redraw_rect.y,
redraw_rect.width,
redraw_rect.height));
if (text_view->left_window)
text_window_invalidate_rect (text_view->left_window,
&redraw_rect);
if (text_view->right_window)
text_window_invalidate_rect (text_view->right_window,
&redraw_rect);
if (text_view->top_window)
text_window_invalidate_rect (text_view->top_window,
&redraw_rect);
if (text_view->bottom_window)
text_window_invalidate_rect (text_view->bottom_window,
&redraw_rect);
gtk_text_view_update_im_spot_location (text_view);
}
}
if (old_height != new_height)
{
gboolean yoffset_changed = FALSE;
GSList *tmp_list;
int new_first_para_top;
int old_first_para_top;
GtkTextIter first;
/* If the bottom of the old area was above the top of the
* screen, we need to scroll to keep the current top of the
* screen in place. Remember that first_para_pixels is the
* position of the top of the screen in coordinates relative to
* the first paragraph onscreen.
*
* In short we are adding the height delta of the portion of the
* changed region above first_para_mark to text_view->yoffset.
*/
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &first,
text_view->first_para_mark);
gtk_text_layout_get_line_yrange (layout, &first, &new_first_para_top, NULL);
old_first_para_top = text_view->yoffset - text_view->first_para_pixels;
if (new_first_para_top != old_first_para_top)
{
text_view->yoffset += new_first_para_top - old_first_para_top;
get_vadjustment (text_view)->value = text_view->yoffset;
yoffset_changed = TRUE;
}
if (yoffset_changed)
{
DV(g_print ("Changing scroll position (%s)\n", G_STRLOC));
gtk_adjustment_value_changed (get_vadjustment (text_view));
}
/* FIXME be smarter about which anchored widgets we update */
tmp_list = text_view->children;
while (tmp_list != NULL)
{
GtkTextViewChild *child = tmp_list->data;
if (child->anchor)
gtk_text_view_update_child_allocation (text_view, child);
tmp_list = g_slist_next (tmp_list);
}
}
{
GtkRequisition old_req;
GtkRequisition new_req;
old_req = widget->requisition;
/* Use this instead of gtk_widget_size_request wrapper
* to avoid the optimization which just returns widget->requisition
* if a resize hasn't been queued.
*/
GTK_WIDGET_GET_CLASS (widget)->size_request (widget, &new_req);
if (old_req.width != new_req.width ||
old_req.height != new_req.height)
{
gtk_widget_queue_resize_no_redraw (widget);
}
}
}
static void
gtk_text_view_realize (GtkWidget *widget)
{
GtkTextView *text_view;
GdkWindowAttr attributes;
gint attributes_mask;
GSList *tmp_list;
text_view = GTK_TEXT_VIEW (widget);
GTK_WIDGET_SET_FLAGS (text_view, GTK_REALIZED);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (widget->window, widget);
/* must come before text_window_realize calls */
widget->style = gtk_style_attach (widget->style, widget->window);
gdk_window_set_background (widget->window,
&widget->style->bg[GTK_WIDGET_STATE (widget)]);
text_window_realize (text_view->text_window, widget->window);
if (text_view->left_window)
text_window_realize (text_view->left_window,
widget->window);
if (text_view->top_window)
text_window_realize (text_view->top_window,
widget->window);
if (text_view->right_window)
text_window_realize (text_view->right_window,
widget->window);
if (text_view->bottom_window)
text_window_realize (text_view->bottom_window,
widget->window);
gtk_text_view_ensure_layout (text_view);
if (text_view->buffer)
{
GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
GDK_SELECTION_PRIMARY);
gtk_text_buffer_add_selection_clipboard (text_view->buffer, clipboard);
}
tmp_list = text_view->children;
while (tmp_list != NULL)
{
GtkTextViewChild *vc = tmp_list->data;
text_view_child_set_parent_window (text_view, vc);
tmp_list = tmp_list->next;
}
}
static void
gtk_text_view_unrealize (GtkWidget *widget)
{
GtkTextView *text_view;
text_view = GTK_TEXT_VIEW (widget);
if (text_view->buffer)
{
GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
GDK_SELECTION_PRIMARY);
gtk_text_buffer_remove_selection_clipboard (text_view->buffer, clipboard);
}
gtk_text_view_remove_validate_idles (text_view);
if (text_view->popup_menu)
{
gtk_widget_destroy (text_view->popup_menu);
text_view->popup_menu = NULL;
}
text_window_unrealize (text_view->text_window);
if (text_view->left_window)
text_window_unrealize (text_view->left_window);
if (text_view->top_window)
text_window_unrealize (text_view->top_window);
if (text_view->right_window)
text_window_unrealize (text_view->right_window);
if (text_view->bottom_window)
text_window_unrealize (text_view->bottom_window);
gtk_text_view_destroy_layout (text_view);
(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}
static void
gtk_text_view_set_background (GtkTextView *text_view)
{
GtkWidget *widget = GTK_WIDGET (text_view);
gdk_window_set_background (widget->window,
&widget->style->bg[GTK_WIDGET_STATE (widget)]);
gdk_window_set_background (text_view->text_window->bin_window,
&widget->style->base[GTK_WIDGET_STATE (widget)]);
if (text_view->left_window)
gdk_window_set_background (text_view->left_window->bin_window,
&widget->style->bg[GTK_WIDGET_STATE (widget)]);
if (text_view->right_window)
gdk_window_set_background (text_view->right_window->bin_window,
&widget->style->bg[GTK_WIDGET_STATE (widget)]);
if (text_view->top_window)
gdk_window_set_background (text_view->top_window->bin_window,
&widget->style->bg[GTK_WIDGET_STATE (widget)]);
if (text_view->bottom_window)
gdk_window_set_background (text_view->bottom_window->bin_window,
&widget->style->bg[GTK_WIDGET_STATE (widget)]);
}
static void
gtk_text_view_style_set (GtkWidget *widget,
GtkStyle *previous_style)
{
GtkTextView *text_view = GTK_TEXT_VIEW (widget);
if (GTK_WIDGET_REALIZED (widget))
{
gtk_text_view_set_background (text_view);
}
if (text_view->layout && previous_style)
{
gtk_text_view_set_attributes_from_style (text_view,
text_view->layout->default_style,
widget->style);
gtk_text_layout_default_style_changed (text_view->layout);
}
}
static void
gtk_text_view_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction)
{
GtkTextView *text_view = GTK_TEXT_VIEW (widget);
if (text_view->layout)
{
text_view->layout->default_style->direction = gtk_widget_get_direction (widget);
gtk_text_layout_default_style_changed (text_view->layout);
}
}
static void
gtk_text_view_state_changed (GtkWidget *widget,
GtkStateType previous_state)
{
GtkTextView *text_view = GTK_TEXT_VIEW (widget);
if (GTK_WIDGET_REALIZED (widget))
{
gtk_text_view_set_background (text_view);
}
if (!GTK_WIDGET_IS_SENSITIVE (widget))
{
/* Clear any selection */
gtk_text_view_unselect (text_view);
}
gtk_widget_queue_draw (widget);
}
static void
set_invisible_cursor (GdkWindow *window)
{
GdkBitmap *empty_bitmap;
GdkCursor *cursor;
GdkColor useless;
char invisible_cursor_bits[] = { 0x0 };
useless.red = useless.green = useless.blue = 0;
useless.pixel = 0;
empty_bitmap = gdk_bitmap_create_from_data (window,
invisible_cursor_bits,
1, 1);
cursor = gdk_cursor_new_from_pixmap (empty_bitmap,
empty_bitmap,
&useless,
&useless, 0, 0);
gdk_window_set_cursor (window, cursor);
gdk_cursor_unref (cursor);
g_object_unref (empty_bitmap);
}
static void
gtk_text_view_obscure_mouse_cursor (GtkTextView *text_view)
{
if (text_view->mouse_cursor_obscured)
return;
set_invisible_cursor (text_view->text_window->bin_window);
text_view->mouse_cursor_obscured = TRUE;
}
static void
gtk_text_view_unobscure_mouse_cursor (GtkTextView *text_view)
{
if (text_view->mouse_cursor_obscured)
{
GdkCursor *cursor;
cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (text_view)),
GDK_XTERM);
gdk_window_set_cursor (text_view->text_window->bin_window, cursor);
gdk_cursor_unref (cursor);
text_view->mouse_cursor_obscured = FALSE;
}
}
static void
gtk_text_view_grab_notify (GtkWidget *widget,
gboolean was_grabbed)
{
if (!was_grabbed)
gtk_text_view_unobscure_mouse_cursor (GTK_TEXT_VIEW (widget));
}
/*
* Events
*/
static gboolean
get_event_coordinates (GdkEvent *event, gint *x, gint *y)
{
if (event)
switch (event->type)
{
case GDK_MOTION_NOTIFY:
*x = event->motion.x;
*y = event->motion.y;
return TRUE;
break;
case GDK_BUTTON_PRESS:
case GDK_2BUTTON_PRESS:
case GDK_3BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
*x = event->button.x;
*y = event->button.y;
return TRUE;
break;
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
case GDK_PROPERTY_NOTIFY:
case GDK_SELECTION_CLEAR:
case GDK_SELECTION_REQUEST:
case GDK_SELECTION_NOTIFY:
case GDK_PROXIMITY_IN:
case GDK_PROXIMITY_OUT:
case GDK_DRAG_ENTER:
case GDK_DRAG_LEAVE:
case GDK_DRAG_MOTION:
case GDK_DRAG_STATUS:
case GDK_DROP_START:
case GDK_DROP_FINISHED:
default:
return FALSE;
break;
}
return FALSE;
}
static gint
emit_event_on_tags (GtkWidget *widget,
GdkEvent *event,
GtkTextIter *iter)
{
GSList *tags;
GSList *tmp;
gboolean retval = FALSE;
tags = gtk_text_iter_get_tags (iter);
tmp = tags;
while (tmp != NULL)
{
GtkTextTag *tag = tmp->data;
if (gtk_text_tag_event (tag, G_OBJECT (widget), event, iter))
{
retval = TRUE;
break;
}
tmp = g_slist_next (tmp);
}
g_slist_free (tags);
return retval;
}
static gint
gtk_text_view_event (GtkWidget *widget, GdkEvent *event)
{
GtkTextView *text_view;
gint x = 0, y = 0;
text_view = GTK_TEXT_VIEW (widget);
if (text_view->layout == NULL ||
get_buffer (text_view) == NULL)
return FALSE;
if (event->any.window != text_view->text_window->bin_window)
return FALSE;
if (get_event_coordinates (event, &x, &y))
{
GtkTextIter iter;
x += text_view->xoffset;
y += text_view->yoffset;
/* FIXME this is slow and we do it twice per event.
* My favorite solution is to have GtkTextLayout cache
* the last couple lookups.
*/
gtk_text_layout_get_iter_at_pixel (text_view->layout,
&iter,
x, y);
return emit_event_on_tags (widget, event, &iter);
}
else if (event->type == GDK_KEY_PRESS ||
event->type == GDK_KEY_RELEASE)
{
GtkTextMark *insert;
GtkTextIter iter;
insert = gtk_text_buffer_get_mark (get_buffer (text_view),
"insert");
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
return emit_event_on_tags (widget, event, &iter);
}
else
return FALSE;
}
static gint
gtk_text_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
{
gboolean retval = FALSE;
gboolean obscure = FALSE;
GtkTextView *text_view = GTK_TEXT_VIEW (widget);
GtkTextMark *insert;
GtkTextIter iter;
gboolean can_insert;
if (text_view->layout == NULL ||
get_buffer (text_view) == NULL)
return FALSE;
insert = gtk_text_buffer_get_insert (get_buffer (text_view));
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
can_insert = gtk_text_iter_can_insert (&iter, text_view->editable);
if (can_insert &&
gtk_im_context_filter_keypress (text_view->im_context, event))
{
text_view->need_im_reset = TRUE;
obscure = TRUE;
retval = TRUE;
}
/* Binding set */
else if (GTK_WIDGET_CLASS (parent_class)->key_press_event &&
GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
retval = TRUE;
/* use overall editability not can_insert, more predictable for users */
else if (text_view->editable &&
(event->keyval == GDK_Return ||
event->keyval == GDK_KP_Enter))
{
/* this won't actually insert the newline if the cursor isn't
* editable
*/
gtk_text_view_reset_im_context (text_view);
gtk_text_view_commit_text (text_view, "\n");
obscure = TRUE;
retval = TRUE;
}
/* Pass through Tab as literal tab, unless Control is held down */
else if ((event->keyval == GDK_Tab ||
event->keyval == GDK_KP_Tab) &&
!(event->state & GDK_CONTROL_MASK))
{
/* If the text widget isn't editable overall, or if the application
* has turned off "accepts_tab", move the focus instead
*/
if (text_view->accepts_tab && text_view->editable)
{
gtk_text_view_reset_im_context (text_view);
gtk_text_view_commit_text (text_view, "\t");
obscure = TRUE;
}
else
gtk_text_view_move_focus (text_view,
(event->state & GDK_SHIFT_MASK) ?
GTK_DIR_TAB_BACKWARD: GTK_DIR_TAB_FORWARD);
retval = TRUE;
}
else
retval = FALSE;
if (obscure)
gtk_text_view_obscure_mouse_cursor (text_view);
gtk_text_view_pend_cursor_blink (text_view);
return retval;
}
static gint
gtk_text_view_key_release_event (GtkWidget *widget, GdkEventKey *event)
{
GtkTextView *text_view = GTK_TEXT_VIEW (widget);
GtkTextMark *insert;
GtkTextIter iter;
if (text_view->layout == NULL || get_buffer (text_view) == NULL)
return FALSE;
insert = gtk_text_buffer_get_insert (get_buffer (text_view));
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
if (gtk_text_iter_can_insert (&iter, text_view->editable) &&
gtk_im_context_filter_keypress (text_view->im_context, event))
{
text_view->need_im_reset = TRUE;
return TRUE;
}
else
return GTK_WIDGET_CLASS (parent_class)->key_release_event (widget, event);
}
static gint
gtk_text_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
{
GtkTextView *text_view;
text_view = GTK_TEXT_VIEW (widget);
gtk_widget_grab_focus (widget);
if (event->window != text_view->text_window->bin_window)
{
/* Remove selection if any. */
gtk_text_view_unselect (text_view);
return FALSE;
}
#if 0
/* debug hack */
if (event->button == 3 && (event->state & GDK_CONTROL_MASK) != 0)
_gtk_text_buffer_spew (GTK_TEXT_VIEW (widget)->buffer);
else if (event->button == 3)
gtk_text_layout_spew (GTK_TEXT_VIEW (widget)->layout);
#endif
if (event->type == GDK_BUTTON_PRESS)
{
gtk_text_view_reset_im_context (text_view);
if (event->button == 1)
{
/* If we're in the selection, start a drag copy/move of the
* selection; otherwise, start creating a new selection.
*/
GtkTextIter iter;
GtkTextIter start, end;
gtk_text_layout_get_iter_at_pixel (text_view->layout,
&iter,
event->x + text_view->xoffset,
event->y + text_view->yoffset);
if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
&start, &end) &&
gtk_text_iter_in_range (&iter, &start, &end))
{
text_view->drag_start_x = event->x;
text_view->drag_start_y = event->y;
text_view->pending_place_cursor_button = event->button;
}
else
{
gtk_text_view_start_selection_drag (text_view, &iter, event);
}
return TRUE;
}
else if (event->button == 2)
{
GtkTextIter iter;
gtk_text_layout_get_iter_at_pixel (text_view->layout,
&iter,
event->x + text_view->xoffset,
event->y + text_view->yoffset);
gtk_text_buffer_paste_clipboard (get_buffer (text_view),
gtk_widget_get_clipboard (widget, GDK_SELECTION_PRIMARY),
&iter,
text_view->editable);
return TRUE;
}
else if (event->button == 3)
{
gtk_text_view_do_popup (text_view, event);
return TRUE;
}
}
else if ((event->type == GDK_2BUTTON_PRESS ||
event->type == GDK_3BUTTON_PRESS) &&
event->button == 1)
{
GtkTextIter iter;
gtk_text_view_end_selection_drag (text_view, event);
gtk_text_layout_get_iter_at_pixel (text_view->layout,
&iter,
event->x + text_view->xoffset,
event->y + text_view->yoffset);
gtk_text_view_start_selection_drag (text_view, &iter, event);
return TRUE;
}
return FALSE;
}
static gint
gtk_text_view_button_release_event (GtkWidget *widget, GdkEventButton *event)
{
GtkTextView *text_view;
text_view = GTK_TEXT_VIEW (widget);
if (event->window != text_view->text_window->bin_window)
return FALSE;
if (event->button == 1)
{
if (text_view->drag_start_x >= 0)
{
text_view->drag_start_x = -1;
text_view->drag_start_y = -1;
}
if (gtk_text_view_end_selection_drag (GTK_TEXT_VIEW (widget), event))
return TRUE;
else if (text_view->pending_place_cursor_button == event->button)
{
GtkTextIter iter;
/* Unselect everything; we clicked inside selection, but
* didn't move by the drag threshold, so just clear selection
* and place cursor.
*/
gtk_text_layout_get_iter_at_pixel (text_view->layout,
&iter,
event->x + text_view->xoffset,
event->y + text_view->yoffset);
gtk_text_buffer_place_cursor (get_buffer (text_view), &iter);
gtk_text_view_check_cursor_blink (text_view);
text_view->pending_place_cursor_button = 0;
return FALSE;
}
}
return FALSE;
}
static void
keymap_direction_changed (GdkKeymap *keymap,
GtkTextView *text_view)
{
gtk_text_view_check_keymap_direction (text_view);
}
static gint
gtk_text_view_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
{
GtkTextView *text_view = GTK_TEXT_VIEW (widget);
gtk_widget_queue_draw (widget);
DV(g_print (G_STRLOC": focus_in_event\n"));
if (text_view->cursor_visible && text_view->layout)
{
gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
gtk_text_view_check_cursor_blink (text_view);
}
g_signal_connect (gdk_keymap_get_for_display (gtk_widget_get_display (widget)),
"direction_changed",
G_CALLBACK (keymap_direction_changed), text_view);
gtk_text_view_check_keymap_direction (text_view);
text_view->need_im_reset = TRUE;
gtk_im_context_focus_in (GTK_TEXT_VIEW (widget)->im_context);
return FALSE;
}
static gint
gtk_text_view_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
{
GtkTextView *text_view = GTK_TEXT_VIEW (widget);
gtk_widget_queue_draw (widget);
DV(g_print (G_STRLOC": focus_out_event\n"));
if (text_view->cursor_visible && text_view->layout)
{
gtk_text_view_check_cursor_blink (text_view);
gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
}
g_signal_handlers_disconnect_by_func (gdk_keymap_get_for_display (gtk_widget_get_display (widget)),
keymap_direction_changed,
text_view);
text_view->need_im_reset = TRUE;
gtk_im_context_focus_out (GTK_TEXT_VIEW (widget)->im_context);
return FALSE;
}
static gint
gtk_text_view_motion_event (GtkWidget *widget, GdkEventMotion *event)
{
GtkTextView *text_view = GTK_TEXT_VIEW (widget);
gtk_text_view_unobscure_mouse_cursor (text_view);
if (event->window == text_view->text_window->bin_window &&
text_view->drag_start_x >= 0)
{
gint x, y;
gdk_window_get_pointer (text_view->text_window->bin_window,
&x, &y, NULL);
if (gtk_drag_check_threshold (widget,
text_view->drag_start_x,
text_view->drag_start_y,
x, y))
{
GtkTextIter iter;
gint buffer_x, buffer_y;
gtk_text_view_window_to_buffer_coords (text_view,
GTK_TEXT_WINDOW_TEXT,
text_view->drag_start_x,
text_view->drag_start_y,
&buffer_x,
&buffer_y);
gtk_text_layout_get_iter_at_pixel (text_view->layout,
&iter,
buffer_x, buffer_y);
gtk_text_view_start_selection_dnd (text_view, &iter, event);
return TRUE;
}
}
return FALSE;
}
static void
gtk_text_view_paint (GtkWidget *widget,
GdkRectangle *area,
GdkEventExpose *event)
{
GtkTextView *text_view;
GList *child_exposes;
GList *tmp_list;
GdkRegion *updates;
text_view = GTK_TEXT_VIEW (widget);
g_return_if_fail (text_view->layout != NULL);
g_return_if_fail (text_view->xoffset >= 0);
g_return_if_fail (text_view->yoffset >= 0);
while (text_view->first_validate_idle != 0)
{
DV (g_print (G_STRLOC": first_validate_idle: %d\n",
text_view->first_validate_idle));
gtk_text_view_flush_first_validate (text_view);
}
/* More regions could have become invalid in the above loop */
updates = gdk_window_get_update_area (text_view->text_window->bin_window);
if (updates)
{
GdkRectangle rect;
gdk_region_get_clipbox (updates, &rect);
gdk_rectangle_union (area, &rect, area);
gdk_region_destroy (updates);
}
if (!text_view->onscreen_validated)
{
g_warning (G_STRLOC ": somehow some text lines were modified or scrolling occurred since the last validation of lines on the screen - may be a text widget bug.");
g_assert_not_reached ();
}
#if 0
printf ("painting %d,%d %d x %d\n",
area->x, area->y,
area->width, area->height);
#endif
child_exposes = NULL;
gtk_text_layout_draw (text_view->layout,
widget,
text_view->text_window->bin_window,
NULL,
text_view->xoffset,
text_view->yoffset,
area->x, area->y,
area->width, area->height,
&child_exposes);
tmp_list = child_exposes;
while (tmp_list != NULL)
{
GtkWidget *child = tmp_list->data;
gtk_container_propagate_expose (GTK_CONTAINER (text_view),
child,
event);
g_object_unref (child);
tmp_list = tmp_list->next;
}
g_list_free (child_exposes);
}
static gint
gtk_text_view_expose_event (GtkWidget *widget, GdkEventExpose *event)
{
GSList *tmp_list;
if (event->window == gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
GTK_TEXT_WINDOW_TEXT))
{
DV(g_print (">Exposed ("G_STRLOC")\n"));
gtk_text_view_paint (widget, &event->area, event);
}
if (event->window == widget->window)
gtk_text_view_draw_focus (widget);
/* Propagate exposes to all unanchored children.
* Anchored children are handled in gtk_text_view_paint().
*/
tmp_list = GTK_TEXT_VIEW (widget)->children;
while (tmp_list != NULL)
{
GtkTextViewChild *vc = tmp_list->data;
/* propagate_expose checks that event->window matches
* child->window
*/
if (!vc->anchor)
gtk_container_propagate_expose (GTK_CONTAINER (widget),
vc->widget,
event);
tmp_list = tmp_list->next;
}
return FALSE;
}
static void
gtk_text_view_draw_focus (GtkWidget *widget)
{
gboolean interior_focus;
/* We clear the focus if we are in interior focus mode. */
gtk_widget_style_get (widget,
"interior-focus", &interior_focus,
NULL);
if (GTK_WIDGET_DRAWABLE (widget))
{
if (GTK_WIDGET_HAS_FOCUS (widget) && !interior_focus)
{
gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget),
NULL, widget, "textview",
0, 0,
widget->allocation.width,
widget->allocation.height);
}
else
{
gdk_window_clear (widget->window);
}
}
}
static gboolean
gtk_text_view_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GtkContainer *container;
gboolean result;
container = GTK_CONTAINER (widget);
if (!gtk_widget_is_focus (widget) &&
container->focus_child == NULL)
{
gtk_widget_grab_focus (widget);
return TRUE;
}
else
{
/*
* Unset CAN_FOCUS flag so that gtk_container_focus() allows
* children to get the focus
*/
GTK_WIDGET_UNSET_FLAGS (widget, GTK_CAN_FOCUS);
result = GTK_WIDGET_CLASS (parent_class)->focus (widget, direction);
GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
return result;
}
}
/*
* Container
*/
static void
gtk_text_view_add (GtkContainer *container,
GtkWidget *child)
{
/* This is pretty random. */
gtk_text_view_add_child_in_window (GTK_TEXT_VIEW (container),
child,
GTK_TEXT_WINDOW_WIDGET,
0, 0);
}
static void
gtk_text_view_remove (GtkContainer *container,
GtkWidget *child)
{
GSList *iter;
GtkTextView *text_view;
GtkTextViewChild *vc;
text_view = GTK_TEXT_VIEW (container);
vc = NULL;
iter = text_view->children;
while (iter != NULL)
{
vc = iter->data;
if (vc->widget == child)
break;
iter = g_slist_next (iter);
}
g_assert (iter != NULL); /* be sure we had the child in the list */
text_view->children = g_slist_remove (text_view->children, vc);
gtk_widget_unparent (vc->widget);
text_view_child_free (vc);
}
static void
gtk_text_view_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GSList *iter;
GtkTextView *text_view;
GSList *copy;
g_return_if_fail (GTK_IS_TEXT_VIEW (container));
g_return_if_fail (callback != NULL);
text_view = GTK_TEXT_VIEW (container);
copy = g_slist_copy (text_view->children);
iter = copy;
while (iter != NULL)
{
GtkTextViewChild *vc = iter->data;
(* callback) (vc->widget, callback_data);
iter = g_slist_next (iter);
}
g_slist_free (copy);
}
#define CURSOR_ON_MULTIPLIER 0.66
#define CURSOR_OFF_MULTIPLIER 0.34
#define CURSOR_PEND_MULTIPLIER 1.0
static gboolean
cursor_blinks (GtkTextView *text_view)
{
GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
gboolean blink;
#ifdef DEBUG_VALIDATION_AND_SCROLLING
return FALSE;
#endif
if (gtk_debug_flags & GTK_DEBUG_UPDATES)
return FALSE;
g_object_get (settings, "gtk-cursor-blink", &blink, NULL);
if (!blink)
return FALSE;
if (text_view->editable)
{
GtkTextMark *insert;
GtkTextIter iter;
insert = gtk_text_buffer_get_insert (get_buffer (text_view));
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
if (gtk_text_iter_editable (&iter, text_view->editable))
return blink;
}
return FALSE;
}
static gint
get_cursor_time (GtkTextView *text_view)
{
GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
gint time;
g_object_get (settings, "gtk-cursor-blink-time", &time, NULL);
return time;
}
/*
* Blink!
*/
static gint
blink_cb (gpointer data)
{
GtkTextView *text_view;
gboolean visible;
GDK_THREADS_ENTER ();
text_view = GTK_TEXT_VIEW (data);
if (!GTK_WIDGET_HAS_FOCUS (text_view))
{
g_warning ("GtkTextView - did not receive focus-out-event. If you\n"
"connect a handler to this signal, it must return\n"
"FALSE so the entry gets the event as well");
}
g_assert (text_view->layout);
g_assert (GTK_WIDGET_HAS_FOCUS (text_view));
g_assert (text_view->cursor_visible);
visible = gtk_text_layout_get_cursor_visible (text_view->layout);
if (visible)
text_view->blink_timeout = g_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
blink_cb,
text_view);
else
text_view->blink_timeout = g_timeout_add (get_cursor_time (text_view) * CURSOR_ON_MULTIPLIER,
blink_cb,
text_view);
/* Block changed_handler while changing the layout's cursor visibility
* because it would expose the whole paragraph. Instead, we expose
* the cursor's area(s) manually below.
*/
g_signal_handlers_block_by_func (text_view->layout,
changed_handler,
text_view);
gtk_text_layout_set_cursor_visible (text_view->layout, !visible);
g_signal_handlers_unblock_by_func (text_view->layout,
changed_handler,
text_view);
text_window_invalidate_cursors (text_view->text_window);
GDK_THREADS_LEAVE ();
/* Remove ourselves */
return FALSE;
}
static void
gtk_text_view_stop_cursor_blink (GtkTextView *text_view)
{
if (text_view->blink_timeout)
{
g_source_remove (text_view->blink_timeout);
text_view->blink_timeout = 0;
}
}
static void
gtk_text_view_check_cursor_blink (GtkTextView *text_view)
{
if (text_view->layout != NULL &&
text_view->cursor_visible &&
GTK_WIDGET_HAS_FOCUS (text_view))
{
if (cursor_blinks (text_view))
{
if (text_view->blink_timeout == 0)
{
gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
text_view->blink_timeout = g_timeout_add (get_cursor_time (text_view) * CURSOR_OFF_MULTIPLIER,
blink_cb,
text_view);
}
}
else
{
gtk_text_view_stop_cursor_blink (text_view);
gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
}
}
else
{
gtk_text_view_stop_cursor_blink (text_view);
gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
}
}
static void
gtk_text_view_pend_cursor_blink (GtkTextView *text_view)
{
if (text_view->layout != NULL &&
text_view->cursor_visible &&
GTK_WIDGET_HAS_FOCUS (text_view) &&
cursor_blinks (text_view))
{
gtk_text_view_stop_cursor_blink (text_view);
gtk_text_layout_set_cursor_visible (text_view->layout, TRUE);
text_view->blink_timeout = g_timeout_add (get_cursor_time (text_view) * CURSOR_PEND_MULTIPLIER,
blink_cb,
text_view);
}
}
/*
* Key binding handlers
*/
static gboolean
gtk_text_view_move_iter_by_lines (GtkTextView *text_view,
GtkTextIter *newplace,
gint count)
{
gboolean ret = TRUE;
while (count < 0)
{
ret = gtk_text_layout_move_iter_to_previous_line (text_view->layout, newplace);
count++;
}
while (count > 0)
{
ret = gtk_text_layout_move_iter_to_next_line (text_view->layout, newplace);
count--;
}
return ret;
}
static void
move_cursor (GtkTextView *text_view,
const GtkTextIter *new_location,
gboolean extend_selection)
{
if (extend_selection)
gtk_text_buffer_move_mark_by_name (get_buffer (text_view),
"insert",
new_location);
else
gtk_text_buffer_place_cursor (get_buffer (text_view),
new_location);
gtk_text_view_check_cursor_blink (text_view);
}
static void
gtk_text_view_move_cursor_internal (GtkTextView *text_view,
GtkMovementStep step,
gint count,
gboolean extend_selection)
{
GtkTextIter insert;
GtkTextIter newplace;
gint cursor_x_pos = 0;
if (!text_view->cursor_visible)
{
GtkScrollStep scroll_step;
switch (step)
{
case GTK_MOVEMENT_LOGICAL_POSITIONS:
case GTK_MOVEMENT_VISUAL_POSITIONS:
case GTK_MOVEMENT_WORDS:
scroll_step = GTK_SCROLL_HORIZONTAL_STEPS;
break;
case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
scroll_step = GTK_SCROLL_HORIZONTAL_ENDS;
break;
case GTK_MOVEMENT_DISPLAY_LINES:
case GTK_MOVEMENT_PARAGRAPHS:
case GTK_MOVEMENT_PARAGRAPH_ENDS:
scroll_step = GTK_SCROLL_STEPS;
break;
case GTK_MOVEMENT_PAGES:
scroll_step = GTK_SCROLL_PAGES;
break;
case GTK_MOVEMENT_HORIZONTAL_PAGES:
scroll_step = GTK_SCROLL_HORIZONTAL_PAGES;
break;
case GTK_MOVEMENT_BUFFER_ENDS:
scroll_step = GTK_SCROLL_ENDS;
break;
default:
scroll_step = GTK_SCROLL_PAGES;
break;
}
gtk_text_view_move_viewport (text_view, scroll_step, count);
return;
}
gtk_text_view_reset_im_context (text_view);
if (step == GTK_MOVEMENT_PAGES)
{
gtk_text_view_scroll_pages (text_view, count, extend_selection);
gtk_text_view_check_cursor_blink (text_view);
gtk_text_view_pend_cursor_blink (text_view);
return;
}
else if (step == GTK_MOVEMENT_HORIZONTAL_PAGES)
{
gtk_text_view_scroll_hpages (text_view, count, extend_selection);
gtk_text_view_check_cursor_blink (text_view);
gtk_text_view_pend_cursor_blink (text_view);
return;
}
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
newplace = insert;
if (step == GTK_MOVEMENT_DISPLAY_LINES)
gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, NULL);
switch (step)
{
case GTK_MOVEMENT_LOGICAL_POSITIONS:
gtk_text_iter_forward_visible_cursor_positions (&newplace, count);
break;
case GTK_MOVEMENT_VISUAL_POSITIONS:
gtk_text_layout_move_iter_visually (text_view->layout,
&newplace, count);
break;
case GTK_MOVEMENT_WORDS:
if (count < 0)
gtk_text_iter_backward_visible_word_starts (&newplace, -count);
else if (count > 0)
{
if (!gtk_text_iter_forward_visible_word_ends (&newplace, count))
gtk_text_iter_forward_to_line_end (&newplace);
}
break;
case GTK_MOVEMENT_DISPLAY_LINES:
if (count < 0)
{
if (gtk_text_view_move_iter_by_lines (text_view, &newplace, count))
gtk_text_layout_move_iter_to_x (text_view->layout, &newplace, cursor_x_pos);
else
gtk_text_iter_set_line_offset (&newplace, 0);
}
if (count > 0)
{
if (gtk_text_view_move_iter_by_lines (text_view, &newplace, count))
gtk_text_layout_move_iter_to_x (text_view->layout, &newplace, cursor_x_pos);
else
gtk_text_iter_forward_to_line_end (&newplace);
}
break;
case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
if (count > 1)
gtk_text_view_move_iter_by_lines (text_view, &newplace, --count);
else if (count < -1)
gtk_text_view_move_iter_by_lines (text_view, &newplace, ++count);
if (count != 0)
gtk_text_layout_move_iter_to_line_end (text_view->layout, &newplace, count);
break;
case GTK_MOVEMENT_PARAGRAPHS:
if (count > 0)
{
if (!gtk_text_iter_ends_line (&newplace))
{
gtk_text_iter_forward_to_line_end (&newplace);
--count;
}
gtk_text_iter_forward_visible_lines (&newplace, count);
gtk_text_iter_forward_to_line_end (&newplace);
}
else if (count < 0)
{
if (gtk_text_iter_get_line_offset (&newplace) > 0)
gtk_text_iter_set_line_offset (&newplace, 0);
gtk_text_iter_forward_visible_lines (&newplace, count);
gtk_text_iter_set_line_offset (&newplace, 0);
}
break;
case GTK_MOVEMENT_PARAGRAPH_ENDS:
if (count > 0)
{
if (!gtk_text_iter_ends_line (&newplace))
gtk_text_iter_forward_to_line_end (&newplace);
}
else if (count < 0)
{
gtk_text_iter_set_line_offset (&newplace, 0);
}
break;
case GTK_MOVEMENT_BUFFER_ENDS:
if (count > 0)
gtk_text_buffer_get_end_iter (get_buffer (text_view), &newplace);
else if (count < 0)
gtk_text_buffer_get_iter_at_offset (get_buffer (text_view), &newplace, 0);
break;
default:
break;
}
/* call move_cursor() even if the cursor hasn't moved, since it
cancels the selection
*/
move_cursor (text_view, &newplace, extend_selection);
if (!gtk_text_iter_equal (&insert, &newplace))
{
DV(g_print (G_STRLOC": scrolling onscreen\n"));
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
if (step == GTK_MOVEMENT_DISPLAY_LINES)
gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, -1);
}
gtk_text_view_check_cursor_blink (text_view);
gtk_text_view_pend_cursor_blink (text_view);
}
static void
gtk_text_view_move_cursor (GtkTextView *text_view,
GtkMovementStep step,
gint count,
gboolean extend_selection)
{
gtk_text_view_move_cursor_internal (text_view, step, count, extend_selection);
}
static void
gtk_text_view_page_horizontally (GtkTextView *text_view,
gint count,
gboolean extend_selection)
{
gtk_text_view_move_cursor_internal (text_view, GTK_MOVEMENT_HORIZONTAL_PAGES,
count, extend_selection);
}
static void
gtk_text_view_move_viewport (GtkTextView *text_view,
GtkScrollStep step,
gint count)
{
GtkAdjustment *adjustment;
gdouble increment;
switch (step)
{
case GTK_SCROLL_STEPS:
case GTK_SCROLL_PAGES:
case GTK_SCROLL_ENDS:
adjustment = get_vadjustment (text_view);
break;
case GTK_SCROLL_HORIZONTAL_STEPS:
case GTK_SCROLL_HORIZONTAL_PAGES:
case GTK_SCROLL_HORIZONTAL_ENDS:
adjustment = get_hadjustment (text_view);
break;
default:
adjustment = get_vadjustment (text_view);
break;
}
switch (step)
{
case GTK_SCROLL_STEPS:
case GTK_SCROLL_HORIZONTAL_STEPS:
increment = adjustment->step_increment;
break;
case GTK_SCROLL_PAGES:
case GTK_SCROLL_HORIZONTAL_PAGES:
increment = adjustment->page_increment;
break;
case GTK_SCROLL_ENDS:
case GTK_SCROLL_HORIZONTAL_ENDS:
increment = adjustment->upper - adjustment->lower;
break;
default:
increment = 0.0;
break;
}
set_adjustment_clamped (adjustment, adjustment->value + count * increment);
}
static void
gtk_text_view_set_anchor (GtkTextView *text_view)
{
GtkTextIter insert;
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
gtk_text_buffer_create_mark (get_buffer (text_view), "anchor", &insert, TRUE);
}
static void
gtk_text_view_scroll_pages (GtkTextView *text_view,
gint count,
gboolean extend_selection)
{
gdouble newval;
gdouble oldval;
GtkAdjustment *adj;
gint cursor_x_pos, cursor_y_pos;
GtkTextIter new_insert;
GtkTextIter anchor;
gint y0, y1;
g_return_if_fail (text_view->vadjustment != NULL);
adj = text_view->vadjustment;
/* Make sure we start from the current cursor position, even
* if it was offscreen, but don't queue more scrolls if we're
* already behind.
*/
if (text_view->pending_scroll)
cancel_pending_scroll (text_view);
else
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
/* Validate the region that will be brought into view by the cursor motion
*/
if (count < 0)
{
gtk_text_view_get_first_para_iter (text_view, &anchor);
y0 = adj->page_size;
y1 = adj->page_size + count * adj->page_increment;
}
else
{
gtk_text_view_get_first_para_iter (text_view, &anchor);
y0 = count * adj->page_increment + adj->page_size;
y1 = 0;
}
gtk_text_layout_validate_yrange (text_view->layout, &anchor, y0, y1);
/* FIXME do we need to update the adjustment ranges here? */
if (count < 0 && adj->value <= (adj->lower + 1e-12))
{
/* already at top, just be sure we are at offset 0 */
gtk_text_buffer_get_start_iter (get_buffer (text_view), &new_insert);
move_cursor (text_view, &new_insert, extend_selection);
}
else if (count > 0 && adj->value >= (adj->upper - adj->page_size - 1e-12))
{
/* already at bottom, just be sure we are at the end */
gtk_text_buffer_get_end_iter (get_buffer (text_view), &new_insert);
move_cursor (text_view, &new_insert, extend_selection);
}
else
{
gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
newval = adj->value;
oldval = adj->value;
newval += count * adj->page_increment;
set_adjustment_clamped (adj, newval);
cursor_y_pos += adj->value - oldval;
gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
clamp_iter_onscreen (text_view, &new_insert);
move_cursor (text_view, &new_insert, extend_selection);
gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
}
/* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
* only guarantees 1 pixel onscreen.
*/
DV(g_print (G_STRLOC": scrolling onscreen\n"));
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
}
static void
gtk_text_view_scroll_hpages (GtkTextView *text_view,
gint count,
gboolean extend_selection)
{
gdouble newval;
gdouble oldval;
GtkAdjustment *adj;
gint cursor_x_pos, cursor_y_pos;
GtkTextIter new_insert;
gint y, height;
g_return_if_fail (text_view->hadjustment != NULL);
adj = text_view->hadjustment;
/* Make sure we start from the current cursor position, even
* if it was offscreen, but don't queue more scrolls if we're
* already behind.
*/
if (text_view->pending_scroll)
cancel_pending_scroll (text_view);
else
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
/* Validate the line that we're moving within.
*/
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
&new_insert,
gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
gtk_text_layout_get_line_yrange (text_view->layout, &new_insert, &y, &height);
gtk_text_layout_validate_yrange (text_view->layout, &new_insert, y, y + height);
/* FIXME do we need to update the adjustment ranges here? */
if (count < 0 && adj->value <= (adj->lower + 1e-12))
{
/* already at far left, just be sure we are at offset 0 */
gtk_text_iter_set_line_offset (&new_insert, 0);
move_cursor (text_view, &new_insert, extend_selection);
}
else if (count > 0 && adj->value >= (adj->upper - adj->page_size - 1e-12))
{
/* already at far right, just be sure we are at the end */
if (!gtk_text_iter_ends_line (&new_insert))
gtk_text_iter_forward_to_line_end (&new_insert);
move_cursor (text_view, &new_insert, extend_selection);
}
else
{
gtk_text_view_get_virtual_cursor_pos (text_view, &cursor_x_pos, &cursor_y_pos);
newval = adj->value;
oldval = adj->value;
newval += count * adj->page_increment;
set_adjustment_clamped (adj, newval);
cursor_x_pos += adj->value - oldval;
gtk_text_layout_get_iter_at_pixel (text_view->layout, &new_insert, cursor_x_pos, cursor_y_pos);
clamp_iter_onscreen (text_view, &new_insert);
move_cursor (text_view, &new_insert, extend_selection);
gtk_text_view_set_virtual_cursor_pos (text_view, cursor_x_pos, cursor_y_pos);
}
/* FIXME for lines shorter than the overall widget width, this results in a
* "bounce" effect as we scroll to the right of the widget, then scroll
* back to get the end of the line onscreen.
* http://bugzilla.gnome.org/show_bug.cgi?id=68963
*/
/* Adjust to have the cursor _entirely_ onscreen, move_mark_onscreen
* only guarantees 1 pixel onscreen.
*/
DV(g_print (G_STRLOC": scrolling onscreen\n"));
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
}
static gboolean
whitespace (gunichar ch, gpointer user_data)
{
return (ch == ' ' || ch == '\t');
}
static gboolean
not_whitespace (gunichar ch, gpointer user_data)
{
return !whitespace (ch, user_data);
}
static gboolean
find_whitepace_region (const GtkTextIter *center,
GtkTextIter *start, GtkTextIter *end)
{
*start = *center;
*end = *center;
if (gtk_text_iter_backward_find_char (start, not_whitespace, NULL, NULL))
gtk_text_iter_forward_char (start); /* we want the first whitespace... */
if (whitespace (gtk_text_iter_get_char (end), NULL))
gtk_text_iter_forward_find_char (end, not_whitespace, NULL, NULL);
return !gtk_text_iter_equal (start, end);
}
static void
gtk_text_view_insert_at_cursor (GtkTextView *text_view,
const gchar *str)
{
gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
text_view->editable);
}
static void
gtk_text_view_delete_from_cursor (GtkTextView *text_view,
GtkDeleteType type,
gint count)
{
GtkTextIter insert;
GtkTextIter start;
GtkTextIter end;
gboolean leave_one = FALSE;
gtk_text_view_reset_im_context (text_view);
if (type == GTK_DELETE_CHARS)
{
/* Char delete deletes the selection, if one exists */
if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
text_view->editable))
return;
}
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
&insert,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
start = insert;
end = insert;
switch (type)
{
case GTK_DELETE_CHARS:
gtk_text_iter_forward_cursor_positions (&end, count);
break;
case GTK_DELETE_WORD_ENDS:
if (count > 0)
gtk_text_iter_forward_word_ends (&end, count);
else if (count < 0)
gtk_text_iter_backward_word_starts (&start, 0 - count);
break;
case GTK_DELETE_WORDS:
break;
case GTK_DELETE_DISPLAY_LINE_ENDS:
break;
case GTK_DELETE_DISPLAY_LINES:
break;
case GTK_DELETE_PARAGRAPH_ENDS:
/* If we're already at a newline, we need to
* simply delete that newline, instead of
* moving to the next one.
*/
if (gtk_text_iter_ends_line (&end))
{
gtk_text_iter_forward_line (&end);
--count;
}
while (count > 0)
{
if (!gtk_text_iter_forward_to_line_end (&end))
break;
--count;
}
/* FIXME figure out what a negative count means
and support that */
break;
case GTK_DELETE_PARAGRAPHS:
if (count > 0)
{
gtk_text_iter_set_line_offset (&start, 0);
gtk_text_iter_forward_to_line_end (&end);
/* Do the lines beyond the first. */
while (count > 1)
{
gtk_text_iter_forward_to_line_end (&end);
--count;
}
}
/* FIXME negative count? */
break;
case GTK_DELETE_WHITESPACE:
{
find_whitepace_region (&insert, &start, &end);
}
break;
default:
break;
}
if (!gtk_text_iter_equal (&start, &end))
{
gtk_text_buffer_begin_user_action (get_buffer (text_view));
if (gtk_text_buffer_delete_interactive (get_buffer (text_view), &start, &end,
text_view->editable))
{
if (leave_one)
gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view),
" ", 1,
text_view->editable);
}
gtk_text_buffer_end_user_action (get_buffer (text_view));
gtk_text_view_set_virtual_cursor_pos (text_view, -1, -1);
DV(g_print (G_STRLOC": scrolling onscreen\n"));
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
}
}
static void
gtk_text_view_backspace (GtkTextView *text_view)
{
GtkTextIter insert;
gtk_text_view_reset_im_context (text_view);
/* Backspace deletes the selection, if one exists */
if (gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
text_view->editable))
return;
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
&insert,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
if (gtk_text_buffer_backspace (get_buffer (text_view), &insert,
TRUE, text_view->editable))
{
gtk_text_view_set_virtual_cursor_pos (text_view, -1, -1);
DV(g_print (G_STRLOC": scrolling onscreen\n"));
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view), "insert"));
}
}
static void
gtk_text_view_cut_clipboard (GtkTextView *text_view)
{
GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
GDK_SELECTION_CLIPBOARD);
gtk_text_buffer_cut_clipboard (get_buffer (text_view),
clipboard,
text_view->editable);
DV(g_print (G_STRLOC": scrolling onscreen\n"));
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
}
static void
gtk_text_view_copy_clipboard (GtkTextView *text_view)
{
GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
GDK_SELECTION_CLIPBOARD);
gtk_text_buffer_copy_clipboard (get_buffer (text_view),
clipboard);
DV(g_print (G_STRLOC": scrolling onscreen\n"));
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
}
static void
gtk_text_view_paste_clipboard (GtkTextView *text_view)
{
GtkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (text_view),
GDK_SELECTION_CLIPBOARD);
gtk_text_buffer_paste_clipboard (get_buffer (text_view),
clipboard,
NULL,
text_view->editable);
DV(g_print (G_STRLOC": scrolling onscreen\n"));
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
}
static void
gtk_text_view_toggle_overwrite (GtkTextView *text_view)
{
text_view->overwrite_mode = !text_view->overwrite_mode;
g_object_notify (G_OBJECT (text_view), "overwrite");
}
/**
* gtk_text_view_get_overwrite:
* @text_view: a #GtkTextView
*
* Returns whether the #GtkTextView is in overwrite mode or not.
*
* Return value: whether @text_view is in overwrite mode or not.
*
* Since: 2.4
**/
gboolean
gtk_text_view_get_overwrite (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
return text_view->overwrite_mode;
}
/**
* gtk_text_view_set_overwrite:
* @text_view: a #GtkTextView
* @overwrite: %TRUE to turn on overwrite mode, %FALSE to turn it off
*
* Changes the #GtkTextView overwrite mode.
*
* Since: 2.4
**/
void
gtk_text_view_set_overwrite (GtkTextView *text_view,
gboolean overwrite)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
overwrite = overwrite != FALSE;
if (text_view->overwrite_mode != overwrite)
{
text_view->overwrite_mode = overwrite;
g_object_notify (G_OBJECT (text_view), "overwrite");
}
}
/**
* gtk_text_view_set_accepts_tab:
* @text_view: A #GtkTextView
* @accepts_tab: %TRUE if pressing the Tab key should insert a tab character, %FALSE, if pressing the Tab key should move the keyboard focus.
*
* Sets the behavior of the text widget when the Tab key is pressed. If @accepts_tab
* is %TRUE a tab character is inserted. If @accepts_tab is %FALSE the keyboard focus
* is moved to the next widget in the focus chain.
*
* Since: 2.4
**/
void
gtk_text_view_set_accepts_tab (GtkTextView *text_view,
gboolean accepts_tab)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
accepts_tab = accepts_tab != FALSE;
if (text_view->accepts_tab != accepts_tab)
{
text_view->accepts_tab = accepts_tab;
g_object_notify (G_OBJECT (text_view), "accepts-tab");
}
}
/**
* gtk_text_view_get_accepts_tab:
* @text_view: A #GtkTextView
*
* Returns whether pressing the Tab key inserts a tab characters.
* gtk_text_view_set_accepts_tab().
*
* Return value: %TRUE if pressing the Tab key inserts a tab character, %FALSE if pressing the Tab key moves the keyboard focus.
*
* Since: 2.4
**/
gboolean
gtk_text_view_get_accepts_tab (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
return text_view->accepts_tab;
}
static void
gtk_text_view_move_focus (GtkTextView *text_view,
GtkDirectionType direction_type)
{
GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (text_view));
if (!GTK_WIDGET_TOPLEVEL (toplevel))
return;
/* Propagate to toplevel */
g_signal_emit_by_name (toplevel, "move_focus", direction_type);
}
/*
* Selections
*/
static void
gtk_text_view_unselect (GtkTextView *text_view)
{
GtkTextIter insert;
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
&insert,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
gtk_text_buffer_move_mark (get_buffer (text_view),
gtk_text_buffer_get_mark (get_buffer (text_view),
"selection_bound"),
&insert);
}
static void
move_mark_to_pointer_and_scroll (GtkTextView *text_view,
const gchar *mark_name)
{
gint x, y;
GdkModifierType state;
GtkTextIter newplace;
/* DV(g_print (G_STRLOC": begin\n")); */
gdk_window_get_pointer (text_view->text_window->bin_window,
&x, &y, &state);
/* DV(g_print (G_STRLOC": get iter at pixel\n"); */
gtk_text_layout_get_iter_at_pixel (text_view->layout,
&newplace,
x + text_view->xoffset,
y + text_view->yoffset);
{
GtkTextMark *mark =
gtk_text_buffer_get_mark (get_buffer (text_view), mark_name);
/* This may invalidate the layout */
DV(g_print (G_STRLOC": move mark\n"));
gtk_text_buffer_move_mark (get_buffer (text_view),
mark,
&newplace);
DV(g_print (G_STRLOC": scrolling onscreen\n"));
gtk_text_view_scroll_mark_onscreen (text_view, mark);
}
DV (g_print ("first validate idle leaving %s is %d\n",
G_STRLOC, text_view->first_validate_idle));
}
static gint
selection_scan_timeout (gpointer data)
{
GtkTextView *text_view;
GDK_THREADS_ENTER ();
text_view = GTK_TEXT_VIEW (data);
DV(g_print (G_STRLOC": calling move_mark_to_pointer_and_scroll\n"));
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
GDK_THREADS_LEAVE ();
return TRUE; /* remain installed. */
}
#define DND_SCROLL_MARGIN 0.20
static gint
drag_scan_timeout (gpointer data)
{
GtkTextView *text_view;
gint x, y;
GdkModifierType state;
GtkTextIter newplace;
GDK_THREADS_ENTER ();
text_view = GTK_TEXT_VIEW (data);
gdk_window_get_pointer (text_view->text_window->bin_window,
&x, &y, &state);
gtk_text_layout_get_iter_at_pixel (text_view->layout,
&newplace,
x + text_view->xoffset,
y + text_view->yoffset);
gtk_text_buffer_move_mark (get_buffer (text_view),
text_view->dnd_mark,
&newplace);
DV(g_print (G_STRLOC": scrolling onscreen\n"));
gtk_text_view_scroll_to_mark (text_view,
text_view->dnd_mark,
DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
GDK_THREADS_LEAVE ();
return TRUE;
}
typedef enum
{
SELECT_CHARACTERS,
SELECT_WORDS,
SELECT_LINES
} SelectionGranularity;
/*
* Move @start and @end to the boundaries of the selection unit (indicated by
* @granularity) which contained @start initially.
* If the selction unit is SELECT_WORDS and @start is not contained in a word
* the selection is extended to all the white spaces between the end of the
* word preceding @start and the start of the one following.
*/
static void
extend_selection (GtkTextView *text_view,
SelectionGranularity granularity,
GtkTextIter *start,
GtkTextIter *end)
{
*end = *start;
if (granularity == SELECT_WORDS)
{
if (gtk_text_iter_inside_word (start))
{
if (!gtk_text_iter_starts_word (start))
gtk_text_iter_backward_visible_word_start (start);
if (!gtk_text_iter_ends_word (end))
{
if (!gtk_text_iter_forward_visible_word_end (end))
gtk_text_iter_forward_to_end (end);
}
}
else
{
GtkTextIter tmp;
tmp = *start;
if (gtk_text_iter_backward_visible_word_start (&tmp))
gtk_text_iter_forward_visible_word_end (&tmp);
if (gtk_text_iter_get_line (&tmp) == gtk_text_iter_get_line (start))
*start = tmp;
else
gtk_text_iter_set_line_offset (start, 0);
tmp = *end;
if (!gtk_text_iter_forward_visible_word_end (&tmp))
gtk_text_iter_forward_to_end (&tmp);
if (gtk_text_iter_ends_word (&tmp))
gtk_text_iter_backward_visible_word_start (&tmp);
if (gtk_text_iter_get_line (&tmp) == gtk_text_iter_get_line (end))
*end = tmp;
else
gtk_text_iter_forward_to_line_end (end);
}
}
else if (granularity == SELECT_LINES)
{
if (gtk_text_view_starts_display_line (text_view, start))
{
/* If on a display line boundary, we assume the user
* clicked off the end of a line and we therefore select
* the line before the boundary.
*/
gtk_text_view_backward_display_line_start (text_view, start);
}
else
{
/* start isn't on the start of a line, so we move it to the
* start, and move end to the end unless it's already there.
*/
gtk_text_view_backward_display_line_start (text_view, start);
if (!gtk_text_view_starts_display_line (text_view, end))
gtk_text_view_forward_display_line_end (text_view, end);
}
}
}
typedef struct
{
SelectionGranularity granularity;
GtkTextMark *orig_start;
GtkTextMark *orig_end;
} SelectionData;
static void
selection_data_free (SelectionData *data)
{
if (data->orig_start != NULL)
gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (data->orig_start),
data->orig_start);
if (data->orig_end != NULL)
gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (data->orig_end),
data->orig_end);
g_free (data);
}
static gint
selection_motion_event_handler (GtkTextView *text_view,
GdkEventMotion *event,
SelectionData *data)
{
if (data->granularity == SELECT_CHARACTERS)
{
move_mark_to_pointer_and_scroll (text_view, "insert");
}
else
{
gint x, y;
GdkModifierType state;
GtkTextIter start, end;
GtkTextIter ins, bound;
GtkTextBuffer *buffer;
gboolean extend;
buffer = get_buffer (text_view);
gtk_text_buffer_get_iter_at_mark (buffer, &ins, data->orig_start);
gtk_text_buffer_get_iter_at_mark (buffer, &bound, data->orig_end);
gdk_window_get_pointer (text_view->text_window->bin_window,
&x, &y, &state);
gtk_text_layout_get_iter_at_pixel (text_view->layout,
&start,
event->x + text_view->xoffset,
event->y + text_view->yoffset);
extend = !gtk_text_iter_in_range (&start, &ins, &bound);
extend_selection (text_view, data->granularity, &start, &end);
if (extend)
{
/* Extend selection */
gtk_text_iter_order (&ins, &start);
gtk_text_iter_order (&end, &bound);
gtk_text_buffer_select_range (buffer, &ins, &bound);
}
else
{
/* Shrink selection */
gtk_text_iter_order (&ins, &start);
gtk_text_iter_order (&end, &bound);
gtk_text_buffer_select_range (buffer, &ins, &end);
}
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_insert (buffer));
}
/* If we had to scroll offscreen, insert a timeout to do so
* again. Note that in the timeout, even if the mouse doesn't
* move, due to this scroll xoffset/yoffset will have changed
* and we'll need to scroll again.
*/
if (text_view->scroll_timeout != 0) /* reset on every motion event */
g_source_remove (text_view->scroll_timeout);
text_view->scroll_timeout =
g_timeout_add (50, selection_scan_timeout, text_view);
return TRUE;
}
static void
gtk_text_view_start_selection_drag (GtkTextView *text_view,
const GtkTextIter *iter,
GdkEventButton *button)
{
GtkTextIter start, end;
GtkTextBuffer *buffer;
SelectionData *data;
g_assert (text_view->selection_drag_handler == 0);
data = g_new0 (SelectionData, 1);
if (button->type == GDK_2BUTTON_PRESS)
data->granularity = SELECT_WORDS;
else if (button->type == GDK_3BUTTON_PRESS)
data->granularity = SELECT_LINES;
else
data->granularity = SELECT_CHARACTERS;
gtk_grab_add (GTK_WIDGET (text_view));
buffer = get_buffer (text_view);
start = *iter;
extend_selection (text_view, data->granularity, &start, &end);
if (button->state & GDK_SHIFT_MASK)
{
/* Extend selection */
GtkTextIter old_start, old_end;
gtk_text_buffer_get_selection_bounds (buffer, &old_start, &old_end);
gtk_text_iter_order (&start, &old_start);
gtk_text_iter_order (&old_end, &end);
/* Now start is the first of the starts, and end is the
* last of the ends
*/
}
gtk_text_buffer_select_range (buffer, &end, &start);
data->orig_start = gtk_text_buffer_create_mark (buffer, NULL,
&start, TRUE);
data->orig_end = gtk_text_buffer_create_mark (buffer, NULL,
&end, TRUE);
gtk_text_view_check_cursor_blink (text_view);
text_view->selection_drag_handler = g_signal_connect_data (text_view,
"motion_notify_event",
G_CALLBACK (selection_motion_event_handler),
data,
(GClosureNotify) selection_data_free, 0);
}
/* returns whether we were really dragging */
static gboolean
gtk_text_view_end_selection_drag (GtkTextView *text_view,
GdkEventButton *event)
{
if (text_view->selection_drag_handler == 0)
return FALSE;
g_signal_handler_disconnect (text_view, text_view->selection_drag_handler);
text_view->selection_drag_handler = 0;
if (text_view->scroll_timeout != 0)
{
g_source_remove (text_view->scroll_timeout);
text_view->scroll_timeout = 0;
}
gtk_grab_remove (GTK_WIDGET (text_view));
return TRUE;
}
/*
* Layout utils
*/
static void
gtk_text_view_set_attributes_from_style (GtkTextView *text_view,
GtkTextAttributes *values,
GtkStyle *style)
{
values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
values->appearance.fg_color = style->text[GTK_STATE_NORMAL];
if (values->font)
pango_font_description_free (values->font);
values->font = pango_font_description_copy (style->font_desc);
}
static void
gtk_text_view_check_keymap_direction (GtkTextView *text_view)
{
if (text_view->layout)
{
GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (text_view));
GdkKeymap *keymap = gdk_keymap_get_for_display (gtk_widget_get_display (GTK_WIDGET (text_view)));
GtkTextDirection new_cursor_dir;
GtkTextDirection new_keyboard_dir;
gboolean split_cursor;
g_object_get (settings,
"gtk-split-cursor", &split_cursor,
NULL);
if (gdk_keymap_get_direction (keymap) == PANGO_DIRECTION_RTL)
new_keyboard_dir = GTK_TEXT_DIR_RTL;
else
new_keyboard_dir = GTK_TEXT_DIR_LTR;
if (split_cursor)
new_cursor_dir = GTK_TEXT_DIR_NONE;
else
new_cursor_dir = new_keyboard_dir;
gtk_text_layout_set_cursor_direction (text_view->layout, new_cursor_dir);
gtk_text_layout_set_keyboard_direction (text_view->layout, new_keyboard_dir);
}
}
static void
gtk_text_view_ensure_layout (GtkTextView *text_view)
{
GtkWidget *widget;
widget = GTK_WIDGET (text_view);
if (text_view->layout == NULL)
{
GtkTextAttributes *style;
PangoContext *ltr_context, *rtl_context;
GSList *tmp_list;
DV(g_print(G_STRLOC"\n"));
text_view->layout = gtk_text_layout_new ();
g_signal_connect (text_view->layout,
"invalidated",
G_CALLBACK (invalidated_handler),
text_view);
g_signal_connect (text_view->layout,
"changed",
G_CALLBACK (changed_handler),
text_view);
g_signal_connect (text_view->layout,
"allocate_child",
G_CALLBACK (gtk_text_view_child_allocated),
text_view);
if (get_buffer (text_view))
gtk_text_layout_set_buffer (text_view->layout, get_buffer (text_view));
if ((GTK_WIDGET_HAS_FOCUS (text_view) && text_view->cursor_visible))
gtk_text_view_pend_cursor_blink (text_view);
else
gtk_text_layout_set_cursor_visible (text_view->layout, FALSE);
ltr_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
rtl_context = gtk_widget_create_pango_context (GTK_WIDGET (text_view));
pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
gtk_text_layout_set_contexts (text_view->layout, ltr_context, rtl_context);
g_object_unref (ltr_context);
g_object_unref (rtl_context);
gtk_text_view_check_keymap_direction (text_view);
style = gtk_text_attributes_new ();
gtk_widget_ensure_style (widget);
gtk_text_view_set_attributes_from_style (text_view,
style, widget->style);
style->pixels_above_lines = text_view->pixels_above_lines;
style->pixels_below_lines = text_view->pixels_below_lines;
style->pixels_inside_wrap = text_view->pixels_inside_wrap;
style->left_margin = text_view->left_margin;
style->right_margin = text_view->right_margin;
style->indent = text_view->indent;
style->tabs = text_view->tabs ? pango_tab_array_copy (text_view->tabs) : NULL;
style->wrap_mode = text_view->wrap_mode;
style->justification = text_view->justify;
style->direction = gtk_widget_get_direction (GTK_WIDGET (text_view));
gtk_text_layout_set_default_style (text_view->layout, style);
gtk_text_attributes_unref (style);
/* Set layout for all anchored children */
tmp_list = text_view->children;
while (tmp_list != NULL)
{
GtkTextViewChild *vc = tmp_list->data;
if (vc->anchor)
{
gtk_text_anchored_child_set_layout (vc->widget,
text_view->layout);
/* vc may now be invalid! */
}
tmp_list = g_slist_next (tmp_list);
}
gtk_text_view_invalidate (text_view);
}
}
/**
* gtk_text_view_get_default_attributes:
* @text_view: a #GtkTextView
*
* Obtains a copy of the default text attributes. These are the
* attributes used for text unless a tag overrides them.
* You'd typically pass the default attributes in to
* gtk_text_iter_get_attributes() in order to get the
* attributes in effect at a given text position.
*
* The return value is a copy owned by the caller of this function,
* and should be freed.
*
* Return value: a new #GtkTextAttributes
**/
GtkTextAttributes*
gtk_text_view_get_default_attributes (GtkTextView *text_view)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
gtk_text_view_ensure_layout (text_view);
return gtk_text_attributes_copy (text_view->layout->default_style);
}
static void
gtk_text_view_destroy_layout (GtkTextView *text_view)
{
if (text_view->layout)
{
GSList *tmp_list;
gtk_text_view_remove_validate_idles (text_view);
g_signal_handlers_disconnect_by_func (text_view->layout,
invalidated_handler,
text_view);
g_signal_handlers_disconnect_by_func (text_view->layout,
changed_handler,
text_view);
/* Remove layout from all anchored children */
tmp_list = text_view->children;
while (tmp_list != NULL)
{
GtkTextViewChild *vc = tmp_list->data;
if (vc->anchor)
{
gtk_text_anchored_child_set_layout (vc->widget, NULL);
/* vc may now be invalid! */
}
tmp_list = g_slist_next (tmp_list);
}
gtk_text_view_stop_cursor_blink (text_view);
gtk_text_view_end_selection_drag (text_view, NULL);
g_object_unref (text_view->layout);
text_view->layout = NULL;
}
}
static void
gtk_text_view_reset_im_context (GtkTextView *text_view)
{
if (text_view->need_im_reset)
{
text_view->need_im_reset = FALSE;
gtk_im_context_reset (text_view->im_context);
}
}
static gchar*
_gtk_text_view_get_selected_text (GtkTextView *text_view)
{
GtkTextBuffer *buffer;
GtkTextIter start, end;
gchar *text = NULL;
buffer = gtk_text_view_get_buffer (text_view);
if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
text = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
return text;
}
/*
* DND feature
*/
static void
drag_begin_cb (GtkWidget *widget,
GdkDragContext *context,
gpointer data)
{
GtkTextView *text_view;
gchar *text;
GdkPixmap *pixmap = NULL;
g_signal_handlers_disconnect_by_func (widget, drag_begin_cb, NULL);
text_view = GTK_TEXT_VIEW (widget);
text = _gtk_text_view_get_selected_text (text_view);
pixmap = _gtk_text_util_create_drag_icon (widget, text, -1);
if (pixmap)
gtk_drag_set_icon_pixmap (context,
gdk_drawable_get_colormap (pixmap),
pixmap,
NULL,
-2, -2);
else
gtk_drag_set_icon_default (context);
if (pixmap)
g_object_unref (pixmap);
g_free (text);
}
static void
gtk_text_view_start_selection_dnd (GtkTextView *text_view,
const GtkTextIter *iter,
GdkEventMotion *event)
{
GtkTargetList *target_list;
text_view->drag_start_x = -1;
text_view->drag_start_y = -1;
text_view->pending_place_cursor_button = 0;
target_list = gtk_target_list_new (target_table,
G_N_ELEMENTS (target_table));
gtk_target_list_add_text_targets (target_list, 0);
g_signal_connect (text_view, "drag-begin",
G_CALLBACK (drag_begin_cb), NULL);
gtk_drag_begin (GTK_WIDGET (text_view), target_list,
GDK_ACTION_COPY | GDK_ACTION_MOVE,
1, (GdkEvent*)event);
gtk_target_list_unref (target_list);
}
static void
gtk_text_view_drag_begin (GtkWidget *widget,
GdkDragContext *context)
{
/* do nothing */
}
static void
gtk_text_view_drag_end (GtkWidget *widget,
GdkDragContext *context)
{
}
static void
gtk_text_view_drag_data_get (GtkWidget *widget,
GdkDragContext *context,
GtkSelectionData *selection_data,
guint info,
guint time)
{
GtkTextView *text_view;
text_view = GTK_TEXT_VIEW (widget);
if (selection_data->target == gdk_atom_intern_static_string ("GTK_TEXT_BUFFER_CONTENTS"))
{
GtkTextBuffer *buffer = gtk_text_view_get_buffer (text_view);
gtk_selection_data_set (selection_data,
gdk_atom_intern_static_string ("GTK_TEXT_BUFFER_CONTENTS"),
8, /* bytes */
(void*)&buffer,
sizeof (buffer));
}
else
{
gchar *str;
GtkTextIter start;
GtkTextIter end;
str = NULL;
if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
&start, &end))
{
/* Extract the selected text */
str = gtk_text_iter_get_visible_text (&start, &end);
}
if (str)
{
gtk_selection_data_set_text (selection_data, str, -1);
g_free (str);
}
}
}
static void
gtk_text_view_drag_data_delete (GtkWidget *widget,
GdkDragContext *context)
{
gtk_text_buffer_delete_selection (GTK_TEXT_VIEW (widget)->buffer,
TRUE, GTK_TEXT_VIEW (widget)->editable);
}
static void
gtk_text_view_drag_leave (GtkWidget *widget,
GdkDragContext *context,
guint time)
{
GtkTextView *text_view;
text_view = GTK_TEXT_VIEW (widget);
gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
if (text_view->scroll_timeout != 0)
g_source_remove (text_view->scroll_timeout);
text_view->scroll_timeout = 0;
}
static gboolean
gtk_text_view_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
GtkTextIter newplace;
GtkTextView *text_view;
GtkTextIter start;
GtkTextIter end;
GdkRectangle target_rect;
gint bx, by;
GdkDragAction suggested_action = 0;
text_view = GTK_TEXT_VIEW (widget);
target_rect = text_view->text_window->allocation;
if (x < target_rect.x ||
y < target_rect.y ||
x > (target_rect.x + target_rect.width) ||
y > (target_rect.y + target_rect.height))
return FALSE; /* outside the text window, allow parent widgets to handle event */
gtk_text_view_window_to_buffer_coords (text_view,
GTK_TEXT_WINDOW_WIDGET,
x, y,
&bx, &by);
gtk_text_layout_get_iter_at_pixel (text_view->layout,
&newplace,
bx, by);
if (gtk_drag_dest_find_target (widget, context,
gtk_drag_dest_get_target_list (widget)) == GDK_NONE)
{
/* can't accept any of the offered targets */
}
else if (gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
&start, &end) &&
gtk_text_iter_compare (&newplace, &start) >= 0 &&
gtk_text_iter_compare (&newplace, &end) <= 0)
{
/* We're inside the selection. */
}
else
{
if (gtk_text_iter_can_insert (&newplace, text_view->editable))
{
GtkWidget *source_widget;
suggested_action = context->suggested_action;
source_widget = gtk_drag_get_source_widget (context);
if (source_widget == widget)
{
/* Default to MOVE, unless the user has
* pressed ctrl or alt to affect available actions
*/
if ((context->actions & GDK_ACTION_MOVE) != 0)
suggested_action = GDK_ACTION_MOVE;
}
}
else
{
/* Can't drop here. */
}
}
if (suggested_action != 0)
{
gtk_text_mark_set_visible (text_view->dnd_mark,
text_view->cursor_visible);
gdk_drag_status (context, suggested_action, time);
}
else
{
gdk_drag_status (context, 0, time);
gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
}
gtk_text_buffer_move_mark (get_buffer (text_view),
text_view->dnd_mark,
&newplace);
DV(g_print (G_STRLOC": scrolling to mark\n"));
gtk_text_view_scroll_to_mark (text_view,
text_view->dnd_mark,
DND_SCROLL_MARGIN, FALSE, 0.0, 0.0);
if (text_view->scroll_timeout != 0) /* reset on every motion event */
g_source_remove (text_view->scroll_timeout);
text_view->scroll_timeout =
g_timeout_add (50, drag_scan_timeout, text_view);
/* TRUE return means don't propagate the drag motion to parent
* widgets that may also be drop sites.
*/
return TRUE;
}
static gboolean
gtk_text_view_drag_drop (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
GtkTextView *text_view;
GtkTextIter drop_point;
GdkAtom target = GDK_NONE;
text_view = GTK_TEXT_VIEW (widget);
if (text_view->scroll_timeout != 0)
g_source_remove (text_view->scroll_timeout);
text_view->scroll_timeout = 0;
gtk_text_mark_set_visible (text_view->dnd_mark, FALSE);
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
&drop_point,
text_view->dnd_mark);
if (gtk_text_iter_can_insert (&drop_point, text_view->editable))
target = gtk_drag_dest_find_target (widget, context, NULL);
if (target != GDK_NONE)
gtk_drag_get_data (widget, context, target, time);
else
gtk_drag_finish (context, FALSE, FALSE, time);
return TRUE;
}
static void
insert_text_data (GtkTextView *text_view,
GtkTextIter *drop_point,
GtkSelectionData *selection_data)
{
gchar *str;
str = gtk_selection_data_get_text (selection_data);
if (str)
{
gtk_text_buffer_insert_interactive (get_buffer (text_view),
drop_point, str, -1,
text_view->editable);
g_free (str);
}
}
static void
gtk_text_view_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection_data,
guint info,
guint time)
{
GtkTextIter drop_point;
GtkTextView *text_view;
gboolean success = FALSE;
GtkTextBuffer *buffer = NULL;
text_view = GTK_TEXT_VIEW (widget);
if (!text_view->dnd_mark)
goto done;
buffer = get_buffer (text_view);
gtk_text_buffer_get_iter_at_mark (buffer,
&drop_point,
text_view->dnd_mark);
if (!gtk_text_iter_can_insert (&drop_point, text_view->editable))
goto done;
success = TRUE;
gtk_text_buffer_begin_user_action (buffer);
if (selection_data->target == gdk_atom_intern_static_string ("GTK_TEXT_BUFFER_CONTENTS"))
{
GtkTextBuffer *src_buffer = NULL;
GtkTextIter start, end;
gboolean copy_tags = TRUE;
if (selection_data->length != sizeof (src_buffer))
return;
memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
if (src_buffer == NULL)
return;
g_return_if_fail (GTK_IS_TEXT_BUFFER (src_buffer));
if (gtk_text_buffer_get_tag_table (src_buffer) !=
gtk_text_buffer_get_tag_table (buffer))
copy_tags = FALSE;
if (gtk_text_buffer_get_selection_bounds (src_buffer,
&start,
&end))
{
if (copy_tags)
gtk_text_buffer_insert_range_interactive (buffer,
&drop_point,
&start,
&end,
text_view->editable);
else
{
gchar *str;
str = gtk_text_iter_get_visible_text (&start, &end);
gtk_text_buffer_insert_interactive (buffer,
&drop_point, str, -1,
text_view->editable);
g_free (str);
}
}
}
else
insert_text_data (text_view, &drop_point, selection_data);
done:
gtk_drag_finish (context, success,
success && context->action == GDK_ACTION_MOVE,
time);
if (success)
{
gtk_text_buffer_get_iter_at_mark (buffer,
&drop_point,
text_view->dnd_mark);
gtk_text_buffer_place_cursor (buffer, &drop_point);
gtk_text_buffer_end_user_action (buffer);
}
}
static GtkAdjustment*
get_hadjustment (GtkTextView *text_view)
{
if (text_view->hadjustment == NULL)
gtk_text_view_set_scroll_adjustments (text_view,
NULL, /* forces creation */
text_view->vadjustment);
return text_view->hadjustment;
}
static GtkAdjustment*
get_vadjustment (GtkTextView *text_view)
{
if (text_view->vadjustment == NULL)
gtk_text_view_set_scroll_adjustments (text_view,
text_view->hadjustment,
NULL); /* forces creation */
return text_view->vadjustment;
}
static void
gtk_text_view_set_scroll_adjustments (GtkTextView *text_view,
GtkAdjustment *hadj,
GtkAdjustment *vadj)
{
gboolean need_adjust = FALSE;
if (hadj)
g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
else
hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
if (vadj)
g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
else
vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
if (text_view->hadjustment && (text_view->hadjustment != hadj))
{
g_signal_handlers_disconnect_by_func (text_view->hadjustment,
gtk_text_view_value_changed,
text_view);
g_object_unref (text_view->hadjustment);
}
if (text_view->vadjustment && (text_view->vadjustment != vadj))
{
g_signal_handlers_disconnect_by_func (text_view->vadjustment,
gtk_text_view_value_changed,
text_view);
g_object_unref (text_view->vadjustment);
}
if (text_view->hadjustment != hadj)
{
text_view->hadjustment = hadj;
g_object_ref_sink (text_view->hadjustment);
g_signal_connect (text_view->hadjustment, "value_changed",
G_CALLBACK (gtk_text_view_value_changed),
text_view);
need_adjust = TRUE;
}
if (text_view->vadjustment != vadj)
{
text_view->vadjustment = vadj;
g_object_ref_sink (text_view->vadjustment);
g_signal_connect (text_view->vadjustment, "value_changed",
G_CALLBACK (gtk_text_view_value_changed),
text_view);
need_adjust = TRUE;
}
if (need_adjust)
gtk_text_view_value_changed (NULL, text_view);
}
/* FIXME this adjust_allocation is a big cut-and-paste from
* GtkCList, needs to be some "official" way to do this
* factored out.
*/
typedef struct
{
GdkWindow *window;
int dx;
int dy;
} ScrollData;
/* The window to which widget->window is relative */
#define ALLOCATION_WINDOW(widget) \
(GTK_WIDGET_NO_WINDOW (widget) ? \
(widget)->window : \
gdk_window_get_parent ((widget)->window))
static void
adjust_allocation_recurse (GtkWidget *widget,
gpointer data)
{
ScrollData *scroll_data = data;
/* Need to really size allocate instead of just poking
* into widget->allocation if the widget is not realized.
* FIXME someone figure out why this was.
*/
if (!GTK_WIDGET_REALIZED (widget))
{
if (GTK_WIDGET_VISIBLE (widget))
{
GdkRectangle tmp_rectangle = widget->allocation;
tmp_rectangle.x += scroll_data->dx;
tmp_rectangle.y += scroll_data->dy;
gtk_widget_size_allocate (widget, &tmp_rectangle);
}
}
else
{
if (ALLOCATION_WINDOW (widget) == scroll_data->window)
{
widget->allocation.x += scroll_data->dx;
widget->allocation.y += scroll_data->dy;
if (GTK_IS_CONTAINER (widget))
gtk_container_forall (GTK_CONTAINER (widget),
adjust_allocation_recurse,
data);
}
}
}
static void
adjust_allocation (GtkWidget *widget,
int dx,
int dy)
{
ScrollData scroll_data;
if (GTK_WIDGET_REALIZED (widget))
scroll_data.window = ALLOCATION_WINDOW (widget);
else
scroll_data.window = NULL;
scroll_data.dx = dx;
scroll_data.dy = dy;
adjust_allocation_recurse (widget, &scroll_data);
}
static void
gtk_text_view_value_changed (GtkAdjustment *adj,
GtkTextView *text_view)
{
GtkTextIter iter;
gint line_top;
gint dx = 0;
gint dy = 0;
/* Note that we oddly call this function with adj == NULL
* sometimes
*/
text_view->onscreen_validated = FALSE;
DV(g_print(">Scroll offset changed %s/%g, onscreen_validated = FALSE ("G_STRLOC")\n",
adj == text_view->hadjustment ? "hadj" : adj == text_view->vadjustment ? "vadj" : "none",
adj ? adj->value : 0.0));
if (adj == text_view->hadjustment)
{
dx = text_view->xoffset - (gint)adj->value;
text_view->xoffset = adj->value;
/* If the change is due to a size change we need
* to invalidate the entire text window because there might be
* right-aligned or centered text
*/
if (text_view->width_changed)
{
gdk_window_invalidate_rect (text_view->text_window->bin_window, NULL, FALSE);
text_view->width_changed = FALSE;
}
}
else if (adj == text_view->vadjustment)
{
dy = text_view->yoffset - (gint)adj->value;
text_view->yoffset = adj->value;
if (text_view->layout)
{
gtk_text_layout_get_line_at_y (text_view->layout, &iter, adj->value, &line_top);
gtk_text_buffer_move_mark (get_buffer (text_view), text_view->first_para_mark, &iter);
text_view->first_para_pixels = adj->value - line_top;
}
}
if (dx != 0 || dy != 0)
{
GSList *tmp_list;
if (GTK_WIDGET_REALIZED (text_view))
{
if (dy != 0)
{
if (text_view->left_window)
text_window_scroll (text_view->left_window, 0, dy);
if (text_view->right_window)
text_window_scroll (text_view->right_window, 0, dy);
}
if (dx != 0)
{
if (text_view->top_window)
text_window_scroll (text_view->top_window, dx, 0);
if (text_view->bottom_window)
text_window_scroll (text_view->bottom_window, dx, 0);
}
/* It looks nicer to scroll the main area last, because
* it takes a while, and making the side areas update
* afterward emphasizes the slowness of scrolling the
* main area.
*/
text_window_scroll (text_view->text_window, dx, dy);
}
/* Children are now "moved" in the text window, poke
* into widget->allocation for each child
*/
tmp_list = text_view->children;
while (tmp_list != NULL)
{
GtkTextViewChild *child = tmp_list->data;
if (child->anchor)
adjust_allocation (child->widget, dx, dy);
tmp_list = g_slist_next (tmp_list);
}
}
/* This could result in invalidation, which would install the
* first_validate_idle, which would validate onscreen;
* but we're going to go ahead and validate here, so
* first_validate_idle shouldn't have anything to do.
*/
gtk_text_view_update_layout_width (text_view);
/* note that validation of onscreen could invoke this function
* recursively, by scrolling to maintain first_para, or in response
* to updating the layout width, however there is no problem with
* that, or shouldn't be.
*/
gtk_text_view_validate_onscreen (text_view);
/* process exposes */
if (GTK_WIDGET_REALIZED (text_view))
{
DV (g_print ("Processing updates (%s)\n", G_STRLOC));
if (text_view->left_window)
gdk_window_process_updates (text_view->left_window->bin_window, TRUE);
if (text_view->right_window)
gdk_window_process_updates (text_view->right_window->bin_window, TRUE);
if (text_view->top_window)
gdk_window_process_updates (text_view->top_window->bin_window, TRUE);
if (text_view->bottom_window)
gdk_window_process_updates (text_view->bottom_window->bin_window, TRUE);
gdk_window_process_updates (text_view->text_window->bin_window, TRUE);
}
/* If this got installed, get rid of it, it's just a waste of time. */
if (text_view->first_validate_idle != 0)
{
g_source_remove (text_view->first_validate_idle);
text_view->first_validate_idle = 0;
}
gtk_text_view_update_im_spot_location (text_view);
DV(g_print(">End scroll offset changed handler ("G_STRLOC")\n"));
}
static void
gtk_text_view_commit_handler (GtkIMContext *context,
const gchar *str,
GtkTextView *text_view)
{
gtk_text_view_commit_text (text_view, str);
}
static void
gtk_text_view_commit_text (GtkTextView *text_view,
const gchar *str)
{
gboolean had_selection;
gtk_text_buffer_begin_user_action (get_buffer (text_view));
had_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
NULL, NULL);
gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
text_view->editable);
if (!strcmp (str, "\n"))
{
gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), "\n", 1,
text_view->editable);
}
else
{
if (!had_selection && text_view->overwrite_mode)
{
GtkTextIter insert;
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
&insert,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
if (!gtk_text_iter_ends_line (&insert))
gtk_text_view_delete_from_cursor (text_view, GTK_DELETE_CHARS, 1);
}
gtk_text_buffer_insert_interactive_at_cursor (get_buffer (text_view), str, -1,
text_view->editable);
}
gtk_text_buffer_end_user_action (get_buffer (text_view));
gtk_text_view_set_virtual_cursor_pos (text_view, -1, -1);
DV(g_print (G_STRLOC": scrolling onscreen\n"));
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
}
static void
gtk_text_view_preedit_changed_handler (GtkIMContext *context,
GtkTextView *text_view)
{
gchar *str;
PangoAttrList *attrs;
gint cursor_pos;
gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
gtk_text_layout_set_preedit_string (text_view->layout, str, attrs, cursor_pos);
pango_attr_list_unref (attrs);
g_free (str);
if (GTK_WIDGET_HAS_FOCUS (text_view))
gtk_text_view_scroll_mark_onscreen (text_view,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
}
static gboolean
gtk_text_view_retrieve_surrounding_handler (GtkIMContext *context,
GtkTextView *text_view)
{
GtkTextIter start;
GtkTextIter end;
gint pos;
gchar *text;
gtk_text_buffer_get_iter_at_mark (text_view->buffer, &start,
gtk_text_buffer_get_insert (text_view->buffer));
end = start;
pos = gtk_text_iter_get_line_index (&start);
gtk_text_iter_set_line_offset (&start, 0);
gtk_text_iter_forward_to_line_end (&end);
text = gtk_text_iter_get_slice (&start, &end);
gtk_im_context_set_surrounding (context, text, -1, pos);
g_free (text);
return TRUE;
}
static gboolean
gtk_text_view_delete_surrounding_handler (GtkIMContext *context,
gint offset,
gint n_chars,
GtkTextView *text_view)
{
GtkTextIter start;
GtkTextIter end;
gtk_text_buffer_get_iter_at_mark (text_view->buffer, &start,
gtk_text_buffer_get_insert (text_view->buffer));
end = start;
gtk_text_iter_forward_chars (&start, offset);
gtk_text_iter_forward_chars (&end, offset + n_chars);
gtk_text_buffer_delete_interactive (text_view->buffer, &start, &end,
text_view->editable);
return TRUE;
}
static void
gtk_text_view_mark_set_handler (GtkTextBuffer *buffer,
const GtkTextIter *location,
GtkTextMark *mark,
gpointer data)
{
GtkTextView *text_view = GTK_TEXT_VIEW (data);
gboolean need_reset = FALSE;
if (mark == gtk_text_buffer_get_insert (buffer))
{
text_view->virtual_cursor_x = -1;
text_view->virtual_cursor_y = -1;
gtk_text_view_update_im_spot_location (text_view);
need_reset = TRUE;
}
else if (mark == gtk_text_buffer_get_selection_bound (buffer))
{
need_reset = TRUE;
}
if (need_reset)
gtk_text_view_reset_im_context (text_view);
}
static void
gtk_text_view_get_cursor_location (GtkTextView *text_view,
GdkRectangle *pos)
{
GtkTextIter insert;
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &insert,
gtk_text_buffer_get_mark (get_buffer (text_view),
"insert"));
gtk_text_layout_get_cursor_locations (text_view->layout, &insert, pos, NULL);
}
static void
gtk_text_view_get_virtual_cursor_pos (GtkTextView *text_view,
gint *x,
gint *y)
{
GdkRectangle pos;
if ((x && text_view->virtual_cursor_x == -1) ||
(y && text_view->virtual_cursor_y == -1))
gtk_text_view_get_cursor_location (text_view, &pos);
if (x)
{
if (text_view->virtual_cursor_x != -1)
*x = text_view->virtual_cursor_x;
else
*x = pos.x;
}
if (y)
{
if (text_view->virtual_cursor_x != -1)
*y = text_view->virtual_cursor_y;
else
*y = pos.y + pos.height / 2;
}
}
static void
gtk_text_view_set_virtual_cursor_pos (GtkTextView *text_view,
gint x,
gint y)
{
GdkRectangle pos;
if (x == -1 || y == -1)
gtk_text_view_get_cursor_location (text_view, &pos);
text_view->virtual_cursor_x = (x == -1) ? pos.x : x;
text_view->virtual_cursor_y = (y == -1) ? pos.y + pos.height / 2 : y;
}
/* Quick hack of a popup menu
*/
static void
activate_cb (GtkWidget *menuitem,
GtkTextView *text_view)
{
const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal");
g_signal_emit_by_name (text_view, signal);
}
static void
append_action_signal (GtkTextView *text_view,
GtkWidget *menu,
const gchar *stock_id,
const gchar *signal,
gboolean sensitive)
{
GtkWidget *menuitem = gtk_image_menu_item_new_from_stock (stock_id, NULL);
g_object_set_data (G_OBJECT (menuitem), I_("gtk-signal"), (char *)signal);
g_signal_connect (menuitem, "activate",
G_CALLBACK (activate_cb), text_view);
gtk_widget_set_sensitive (menuitem, sensitive);
gtk_widget_show (menuitem);
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
}
static void
gtk_text_view_select_all (GtkWidget *widget,
gboolean select)
{
GtkTextView *text_view = GTK_TEXT_VIEW (widget);
GtkTextBuffer *buffer;
GtkTextIter start_iter, end_iter, insert;
buffer = text_view->buffer;
if (select)
{
gtk_text_buffer_get_bounds (buffer, &start_iter, &end_iter);
gtk_text_buffer_select_range (buffer, &start_iter, &end_iter);
}
else
{
gtk_text_buffer_get_iter_at_mark (buffer, &insert,
gtk_text_buffer_get_insert (buffer));
gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &insert);
}
}
static void
select_all_cb (GtkWidget *menuitem,
GtkTextView *text_view)
{
gtk_text_view_select_all (GTK_WIDGET (text_view), TRUE);
}
static void
delete_cb (GtkTextView *text_view)
{
gtk_text_buffer_delete_selection (get_buffer (text_view), TRUE,
text_view->editable);
}
static void
popup_menu_detach (GtkWidget *attach_widget,
GtkMenu *menu)
{
GTK_TEXT_VIEW (attach_widget)->popup_menu = NULL;
}
static void
popup_position_func (GtkMenu *menu,
gint *x,
gint *y,
gboolean *push_in,
gpointer user_data)
{
GtkTextView *text_view;
GtkWidget *widget;
GdkRectangle cursor_rect;
GdkRectangle onscreen_rect;
gint root_x, root_y;
GtkTextIter iter;
GtkRequisition req;
GdkScreen *screen;
gint monitor_num;
GdkRectangle monitor;
text_view = GTK_TEXT_VIEW (user_data);
widget = GTK_WIDGET (text_view);
g_return_if_fail (GTK_WIDGET_REALIZED (text_view));
screen = gtk_widget_get_screen (widget);
gdk_window_get_origin (widget->window, &root_x, &root_y);
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
&iter,
gtk_text_buffer_get_insert (get_buffer (text_view)));
gtk_text_view_get_iter_location (text_view,
&iter,
&cursor_rect);
gtk_text_view_get_visible_rect (text_view, &onscreen_rect);
gtk_widget_size_request (text_view->popup_menu, &req);
/* can't use rectangle_intersect since cursor rect can have 0 width */
if (cursor_rect.x >= onscreen_rect.x &&
cursor_rect.x < onscreen_rect.x + onscreen_rect.width &&
cursor_rect.y >= onscreen_rect.y &&
cursor_rect.y < onscreen_rect.y + onscreen_rect.height)
{
gtk_text_view_buffer_to_window_coords (text_view,
GTK_TEXT_WINDOW_WIDGET,
cursor_rect.x, cursor_rect.y,
&cursor_rect.x, &cursor_rect.y);
*x = root_x + cursor_rect.x + cursor_rect.width;
*y = root_y + cursor_rect.y + cursor_rect.height;
}
else
{
/* Just center the menu, since cursor is offscreen. */
*x = root_x + (widget->allocation.width / 2 - req.width / 2);
*y = root_y + (widget->allocation.height / 2 - req.height / 2);
}
/* Ensure sanity */
*x = CLAMP (*x, root_x, (root_x + widget->allocation.width));
*y = CLAMP (*y, root_y, (root_y + widget->allocation.height));
monitor_num = gdk_screen_get_monitor_at_point (screen, *x, *y);
gtk_menu_set_monitor (menu, monitor_num);
gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);
*x = CLAMP (*x, monitor.x, monitor.x + MAX (0, monitor.width - req.width));
*y = CLAMP (*y, monitor.y, monitor.y + MAX (0, monitor.height - req.height));
*push_in = FALSE;
}
typedef struct
{
GtkTextView *text_view;
gint button;
guint time;
} PopupInfo;
static gboolean
range_contains_editable_text (const GtkTextIter *start,
const GtkTextIter *end,
gboolean default_editability)
{
GtkTextIter iter = *start;
while (gtk_text_iter_compare (&iter, end) < 0)
{
if (gtk_text_iter_editable (&iter, default_editability))
return TRUE;
gtk_text_iter_forward_to_tag_toggle (&iter, NULL);
}
return FALSE;
}
static void
unichar_chosen_func (const char *text,
gpointer data)
{
GtkTextView *text_view = GTK_TEXT_VIEW (data);
gtk_text_view_commit_text (text_view, text);
}
static void
popup_targets_received (GtkClipboard *clipboard,
GtkSelectionData *data,
gpointer user_data)
{
PopupInfo *info = user_data;
GtkTextView *text_view = info->text_view;
if (GTK_WIDGET_REALIZED (text_view))
{
/* We implicitely rely here on the fact that if we are pasting ourself, we'll
* have text targets as well as the private GTK_TEXT_BUFFER_CONTENTS target.
*/
gboolean clipboard_contains_text;
GtkWidget *menuitem;
GtkWidget *submenu;
gboolean have_selection;
gboolean can_insert;
GtkTextIter iter;
GtkTextIter sel_start, sel_end;
gboolean show_input_method_menu;
gboolean show_unicode_menu;
clipboard_contains_text = gtk_selection_data_targets_include_text (data);
if (text_view->popup_menu)
gtk_widget_destroy (text_view->popup_menu);
text_view->popup_menu = gtk_menu_new ();
gtk_menu_attach_to_widget (GTK_MENU (text_view->popup_menu),
GTK_WIDGET (text_view),
popup_menu_detach);
have_selection = gtk_text_buffer_get_selection_bounds (get_buffer (text_view),
&sel_start, &sel_end);
gtk_text_buffer_get_iter_at_mark (get_buffer (text_view),
&iter,
gtk_text_buffer_get_insert (get_buffer (text_view)));
can_insert = gtk_text_iter_can_insert (&iter, text_view->editable);
append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_CUT, "cut_clipboard",
have_selection &&
range_contains_editable_text (&sel_start, &sel_end,
text_view->editable));
append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_COPY, "copy_clipboard",
have_selection);
append_action_signal (text_view, text_view->popup_menu, GTK_STOCK_PASTE, "paste_clipboard",
can_insert && clipboard_contains_text);
menuitem = gtk_image_menu_item_new_from_stock (GTK_STOCK_DELETE, NULL);
gtk_widget_set_sensitive (menuitem,
have_selection &&
range_contains_editable_text (&sel_start, &sel_end,
text_view->editable));
g_signal_connect_swapped (menuitem, "activate",
G_CALLBACK (delete_cb), text_view);
gtk_widget_show (menuitem);
gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
menuitem = gtk_separator_menu_item_new ();
gtk_widget_show (menuitem);
gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
menuitem = gtk_image_menu_item_new_from_stock (GTK_STOCK_SELECT_ALL, NULL);
g_signal_connect (menuitem, "activate",
G_CALLBACK (select_all_cb), text_view);
gtk_widget_show (menuitem);
gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
g_object_get (gtk_widget_get_settings (GTK_WIDGET (text_view)),
"gtk-show-input-method-menu", &show_input_method_menu,
"gtk-show-unicode-menu", &show_unicode_menu,
NULL);
if (show_input_method_menu || show_unicode_menu)
{
menuitem = gtk_separator_menu_item_new ();
gtk_widget_show (menuitem);
gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
}
if (show_input_method_menu)
{
menuitem = gtk_menu_item_new_with_mnemonic (_("Input _Methods"));
gtk_widget_show (menuitem);
gtk_widget_set_sensitive (menuitem, can_insert);
submenu = gtk_menu_new ();
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
gtk_im_multicontext_append_menuitems (GTK_IM_MULTICONTEXT (text_view->im_context),
GTK_MENU_SHELL (submenu));
}
if (show_unicode_menu)
{
menuitem = gtk_menu_item_new_with_mnemonic (_("_Insert Unicode Control Character"));
gtk_widget_show (menuitem);
gtk_widget_set_sensitive (menuitem, can_insert);
submenu = gtk_menu_new ();
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
gtk_menu_shell_append (GTK_MENU_SHELL (text_view->popup_menu), menuitem);
_gtk_text_util_append_special_char_menuitems (GTK_MENU_SHELL (submenu),
unichar_chosen_func,
text_view);
}
g_signal_emit (text_view,
signals[POPULATE_POPUP],
0,
text_view->popup_menu);
if (info->button)
gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
NULL, NULL,
info->button, info->time);
else
{
gtk_menu_popup (GTK_MENU (text_view->popup_menu), NULL, NULL,
popup_position_func, text_view,
0, gtk_get_current_event_time ());
gtk_menu_shell_select_first (GTK_MENU_SHELL (text_view->popup_menu), FALSE);
}
}
g_object_unref (text_view);
g_free (info);
}
static void
gtk_text_view_do_popup (GtkTextView *text_view,
GdkEventButton *event)
{
PopupInfo *info = g_new (PopupInfo, 1);
/* should not need this, see http://bugzilla.gnome.org/show_bug.cgi?id=74620 */
gtk_text_view_end_selection_drag (text_view, event);
/* In order to know what entries we should make sensitive, we
* ask for the current targets of the clipboard, and when
* we get them, then we actually pop up the menu.
*/
info->text_view = g_object_ref (text_view);
if (event)
{
info->button = event->button;
info->time = event->time;
}
else
{
info->button = 0;
info->time = gtk_get_current_event_time ();
}
gtk_clipboard_request_contents (gtk_widget_get_clipboard (GTK_WIDGET (text_view),
GDK_SELECTION_CLIPBOARD),
gdk_atom_intern_static_string ("TARGETS"),
popup_targets_received,
info);
}
static gboolean
gtk_text_view_popup_menu (GtkWidget *widget)
{
gtk_text_view_do_popup (GTK_TEXT_VIEW (widget), NULL);
return TRUE;
}
/* Child GdkWindows */
static GtkTextWindow*
text_window_new (GtkTextWindowType type,
GtkWidget *widget,
gint width_request,
gint height_request)
{
GtkTextWindow *win;
win = g_new (GtkTextWindow, 1);
win->type = type;
win->widget = widget;
win->window = NULL;
win->bin_window = NULL;
win->requisition.width = width_request;
win->requisition.height = height_request;
win->allocation.width = width_request;
win->allocation.height = height_request;
win->allocation.x = 0;
win->allocation.y = 0;
return win;
}
static void
text_window_free (GtkTextWindow *win)
{
if (win->window)
text_window_unrealize (win);
g_free (win);
}
static void
text_window_realize (GtkTextWindow *win,
GdkWindow *parent)
{
GdkWindowAttr attributes;
gint attributes_mask;
GdkCursor *cursor;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = win->allocation.x;
attributes.y = win->allocation.y;
attributes.width = win->allocation.width;
attributes.height = win->allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (win->widget);
attributes.colormap = gtk_widget_get_colormap (win->widget);
attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
win->window = gdk_window_new (parent,
&attributes,
attributes_mask);
gdk_window_set_back_pixmap (win->window, NULL, FALSE);
gdk_window_show (win->window);
gdk_window_set_user_data (win->window, win->widget);
attributes.x = 0;
attributes.y = 0;
attributes.width = win->allocation.width;
attributes.height = win->allocation.height;
attributes.event_mask = (GDK_EXPOSURE_MASK |
GDK_SCROLL_MASK |
GDK_KEY_PRESS_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_POINTER_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK |
gtk_widget_get_events (win->widget));
win->bin_window = gdk_window_new (win->window,
&attributes,
attributes_mask);
gdk_window_show (win->bin_window);
gdk_window_set_user_data (win->bin_window, win->widget);
if (win->type == GTK_TEXT_WINDOW_TEXT)
{
/* I-beam cursor */
cursor = gdk_cursor_new_for_display (gdk_drawable_get_display (parent),
GDK_XTERM);
gdk_window_set_cursor (win->bin_window, cursor);
gdk_cursor_unref (cursor);
gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
win->window);
gdk_window_set_background (win->bin_window,
&win->widget->style->base[GTK_WIDGET_STATE (win->widget)]);
}
else
{
gdk_window_set_background (win->bin_window,
&win->widget->style->bg[GTK_WIDGET_STATE (win->widget)]);
}
g_object_set_qdata (G_OBJECT (win->window),
g_quark_from_static_string ("gtk-text-view-text-window"),
win);
g_object_set_qdata (G_OBJECT (win->bin_window),
g_quark_from_static_string ("gtk-text-view-text-window"),
win);
}
static void
text_window_unrealize (GtkTextWindow *win)
{
if (win->type == GTK_TEXT_WINDOW_TEXT)
{
gtk_im_context_set_client_window (GTK_TEXT_VIEW (win->widget)->im_context,
NULL);
}
gdk_window_set_user_data (win->window, NULL);
gdk_window_set_user_data (win->bin_window, NULL);
gdk_window_destroy (win->bin_window);
gdk_window_destroy (win->window);
win->window = NULL;
win->bin_window = NULL;
}
static void
text_window_size_allocate (GtkTextWindow *win,
GdkRectangle *rect)
{
win->allocation = *rect;
if (win->window)
{
gdk_window_move_resize (win->window,
rect->x, rect->y,
rect->width, rect->height);
gdk_window_resize (win->bin_window,
rect->width, rect->height);
}
}
static void
text_window_scroll (GtkTextWindow *win,
gint dx,
gint dy)
{
if (dx != 0 || dy != 0)
{
gdk_window_scroll (win->bin_window, dx, dy);
}
}
static void
text_window_invalidate_rect (GtkTextWindow *win,
GdkRectangle *rect)
{
GdkRectangle window_rect;
gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (win->widget),
win->type,
rect->x,
rect->y,
&window_rect.x,
&window_rect.y);
window_rect.width = rect->width;
window_rect.height = rect->height;
/* Adjust the rect as appropriate */
switch (win->type)
{
case GTK_TEXT_WINDOW_TEXT:
break;
case GTK_TEXT_WINDOW_LEFT:
case GTK_TEXT_WINDOW_RIGHT:
window_rect.x = 0;
window_rect.width = win->allocation.width;
break;
case GTK_TEXT_WINDOW_TOP:
case GTK_TEXT_WINDOW_BOTTOM:
window_rect.y = 0;
window_rect.height = win->allocation.height;
break;
default:
g_warning ("%s: bug!", G_STRLOC);
return;
break;
}
gdk_window_invalidate_rect (win->bin_window, &window_rect, FALSE);
#if 0
{
cairo_t *cr = gdk_cairo_create (win->bin_window);
gdk_cairo_rectangle (cr, &window_rect);
cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); /* red */
cairo_fill (cr);
cairo_destroy (cr);
}
#endif
}
static void
text_window_invalidate_cursors (GtkTextWindow *win)
{
GtkTextView *text_view = GTK_TEXT_VIEW (win->widget);
GtkTextIter iter;
GdkRectangle strong;
GdkRectangle weak;
gboolean draw_arrow;
gfloat cursor_aspect_ratio;
gint stem_width;
gint arrow_width;
gtk_text_buffer_get_iter_at_mark (text_view->buffer, &iter,
gtk_text_buffer_get_insert (text_view->buffer));
gtk_text_layout_get_cursor_locations (text_view->layout, &iter,
&strong, &weak);
/* cursor width calculation as in gtkstyle.c:draw_insertion_cursor(),
* ignoring the text direction be exposing both sides of the cursor
*/
draw_arrow = (strong.x != weak.x || strong.y != weak.y);
gtk_widget_style_get (win->widget,
"cursor-aspect-ratio", &cursor_aspect_ratio,
NULL);
stem_width = strong.height * cursor_aspect_ratio + 1;
arrow_width = stem_width + 1;
/* round up to the next even number */
if (stem_width & 1)
stem_width++;
strong.x -= stem_width / 2;
strong.width += stem_width;
if (draw_arrow)
{
strong.x -= arrow_width;
strong.width += arrow_width * 2;
}
text_window_invalidate_rect (win, &strong);
if (draw_arrow) /* == have weak */
{
stem_width = weak.height * cursor_aspect_ratio + 1;
arrow_width = stem_width + 1;
/* round up to the next even number */
if (stem_width & 1)
stem_width++;
weak.x -= stem_width / 2;
weak.width += stem_width;
weak.x -= arrow_width;
weak.width += arrow_width * 2;
text_window_invalidate_rect (win, &weak);
}
}
static gint
text_window_get_width (GtkTextWindow *win)
{
return win->allocation.width;
}
static gint
text_window_get_height (GtkTextWindow *win)
{
return win->allocation.height;
}
/* Windows */
/**
* gtk_text_view_get_window:
* @text_view: a #GtkTextView
* @win: window to get
*
* Retrieves the #GdkWindow corresponding to an area of the text view;
* possible windows include the overall widget window, child windows
* on the left, right, top, bottom, and the window that displays the
* text buffer. Windows are %NULL and nonexistent if their width or
* height is 0, and are nonexistent before the widget has been
* realized.
*
* Return value: a #GdkWindow, or %NULL
**/
GdkWindow*
gtk_text_view_get_window (GtkTextView *text_view,
GtkTextWindowType win)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
switch (win)
{
case GTK_TEXT_WINDOW_WIDGET:
return GTK_WIDGET (text_view)->window;
break;
case GTK_TEXT_WINDOW_TEXT:
return text_view->text_window->bin_window;
break;
case GTK_TEXT_WINDOW_LEFT:
if (text_view->left_window)
return text_view->left_window->bin_window;
else
return NULL;
break;
case GTK_TEXT_WINDOW_RIGHT:
if (text_view->right_window)
return text_view->right_window->bin_window;
else
return NULL;
break;
case GTK_TEXT_WINDOW_TOP:
if (text_view->top_window)
return text_view->top_window->bin_window;
else
return NULL;
break;
case GTK_TEXT_WINDOW_BOTTOM:
if (text_view->bottom_window)
return text_view->bottom_window->bin_window;
else
return NULL;
break;
case GTK_TEXT_WINDOW_PRIVATE:
g_warning ("%s: You can't get GTK_TEXT_WINDOW_PRIVATE, it has \"PRIVATE\" in the name because it is private.", G_GNUC_FUNCTION);
return NULL;
break;
}
g_warning ("%s: Unknown GtkTextWindowType", G_GNUC_FUNCTION);
return NULL;
}
/**
* gtk_text_view_get_window_type:
* @text_view: a #GtkTextView
* @window: a window type
*
* Usually used to find out which window an event corresponds to.
* If you connect to an event signal on @text_view, this function
* should be called on <literal>event-&gt;window</literal> to
* see which window it was.
*
* Return value: the window type.
**/
GtkTextWindowType
gtk_text_view_get_window_type (GtkTextView *text_view,
GdkWindow *window)
{
GtkTextWindow *win;
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
if (window == GTK_WIDGET (text_view)->window)
return GTK_TEXT_WINDOW_WIDGET;
win = g_object_get_qdata (G_OBJECT (window),
g_quark_try_string ("gtk-text-view-text-window"));
if (win)
return win->type;
else
{
return GTK_TEXT_WINDOW_PRIVATE;
}
}
static void
buffer_to_widget (GtkTextView *text_view,
gint buffer_x,
gint buffer_y,
gint *window_x,
gint *window_y)
{
if (window_x)
{
*window_x = buffer_x - text_view->xoffset;
*window_x += text_view->text_window->allocation.x;
}
if (window_y)
{
*window_y = buffer_y - text_view->yoffset;
*window_y += text_view->text_window->allocation.y;
}
}
static void
widget_to_text_window (GtkTextWindow *win,
gint widget_x,
gint widget_y,
gint *window_x,
gint *window_y)
{
if (window_x)
*window_x = widget_x - win->allocation.x;
if (window_y)
*window_y = widget_y - win->allocation.y;
}
static void
buffer_to_text_window (GtkTextView *text_view,
GtkTextWindow *win,
gint buffer_x,
gint buffer_y,
gint *window_x,
gint *window_y)
{
if (win == NULL)
{
g_warning ("Attempt to convert text buffer coordinates to coordinates "
"for a nonexistent or private child window of GtkTextView");
return;
}
buffer_to_widget (text_view,
buffer_x, buffer_y,
window_x, window_y);
widget_to_text_window (win,
window_x ? *window_x : 0,
window_y ? *window_y : 0,
window_x,
window_y);
}
/**
* gtk_text_view_buffer_to_window_coords:
* @text_view: a #GtkTextView
* @win: a #GtkTextWindowType except #GTK_TEXT_WINDOW_PRIVATE
* @buffer_x: buffer x coordinate
* @buffer_y: buffer y coordinate
* @window_x: window x coordinate return location
* @window_y: window y coordinate return location
*
* Converts coordinate (@buffer_x, @buffer_y) to coordinates for the window
* @win, and stores the result in (@window_x, @window_y).
*
* Note that you can't convert coordinates for a nonexisting window (see
* gtk_text_view_set_border_window_size()).
**/
void
gtk_text_view_buffer_to_window_coords (GtkTextView *text_view,
GtkTextWindowType win,
gint buffer_x,
gint buffer_y,
gint *window_x,
gint *window_y)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
switch (win)
{
case GTK_TEXT_WINDOW_WIDGET:
buffer_to_widget (text_view,
buffer_x, buffer_y,
window_x, window_y);
break;
case GTK_TEXT_WINDOW_TEXT:
if (window_x)
*window_x = buffer_x - text_view->xoffset;
if (window_y)
*window_y = buffer_y - text_view->yoffset;
break;
case GTK_TEXT_WINDOW_LEFT:
buffer_to_text_window (text_view,
text_view->left_window,
buffer_x, buffer_y,
window_x, window_y);
break;
case GTK_TEXT_WINDOW_RIGHT:
buffer_to_text_window (text_view,
text_view->right_window,
buffer_x, buffer_y,
window_x, window_y);
break;
case GTK_TEXT_WINDOW_TOP:
buffer_to_text_window (text_view,
text_view->top_window,
buffer_x, buffer_y,
window_x, window_y);
break;
case GTK_TEXT_WINDOW_BOTTOM:
buffer_to_text_window (text_view,
text_view->bottom_window,
buffer_x, buffer_y,
window_x, window_y);
break;
case GTK_TEXT_WINDOW_PRIVATE:
g_warning ("%s: can't get coords for private windows", G_STRLOC);
break;
default:
g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
break;
}
}
static void
widget_to_buffer (GtkTextView *text_view,
gint widget_x,
gint widget_y,
gint *buffer_x,
gint *buffer_y)
{
if (buffer_x)
{
*buffer_x = widget_x + text_view->xoffset;
*buffer_x -= text_view->text_window->allocation.x;
}
if (buffer_y)
{
*buffer_y = widget_y + text_view->yoffset;
*buffer_y -= text_view->text_window->allocation.y;
}
}
static void
text_window_to_widget (GtkTextWindow *win,
gint window_x,
gint window_y,
gint *widget_x,
gint *widget_y)
{
if (widget_x)
*widget_x = window_x + win->allocation.x;
if (widget_y)
*widget_y = window_y + win->allocation.y;
}
static void
text_window_to_buffer (GtkTextView *text_view,
GtkTextWindow *win,
gint window_x,
gint window_y,
gint *buffer_x,
gint *buffer_y)
{
if (win == NULL)
{
g_warning ("Attempt to convert GtkTextView buffer coordinates into "
"coordinates for a nonexistent child window.");
return;
}
text_window_to_widget (win,
window_x,
window_y,
buffer_x,
buffer_y);
widget_to_buffer (text_view,
buffer_x ? *buffer_x : 0,
buffer_y ? *buffer_y : 0,
buffer_x,
buffer_y);
}
/**
* gtk_text_view_window_to_buffer_coords:
* @text_view: a #GtkTextView
* @win: a #GtkTextWindowType except #GTK_TEXT_WINDOW_PRIVATE
* @window_x: window x coordinate
* @window_y: window y coordinate
* @buffer_x: buffer x coordinate return location
* @buffer_y: buffer y coordinate return location
*
* Converts coordinates on the window identified by @win to buffer
* coordinates, storing the result in (@buffer_x,@buffer_y).
*
* Note that you can't convert coordinates for a nonexisting window (see
* gtk_text_view_set_border_window_size()).
**/
void
gtk_text_view_window_to_buffer_coords (GtkTextView *text_view,
GtkTextWindowType win,
gint window_x,
gint window_y,
gint *buffer_x,
gint *buffer_y)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
switch (win)
{
case GTK_TEXT_WINDOW_WIDGET:
widget_to_buffer (text_view,
window_x, window_y,
buffer_x, buffer_y);
break;
case GTK_TEXT_WINDOW_TEXT:
if (buffer_x)
*buffer_x = window_x + text_view->xoffset;
if (buffer_y)
*buffer_y = window_y + text_view->yoffset;
break;
case GTK_TEXT_WINDOW_LEFT:
text_window_to_buffer (text_view,
text_view->left_window,
window_x, window_y,
buffer_x, buffer_y);
break;
case GTK_TEXT_WINDOW_RIGHT:
text_window_to_buffer (text_view,
text_view->right_window,
window_x, window_y,
buffer_x, buffer_y);
break;
case GTK_TEXT_WINDOW_TOP:
text_window_to_buffer (text_view,
text_view->top_window,
window_x, window_y,
buffer_x, buffer_y);
break;
case GTK_TEXT_WINDOW_BOTTOM:
text_window_to_buffer (text_view,
text_view->bottom_window,
window_x, window_y,
buffer_x, buffer_y);
break;
case GTK_TEXT_WINDOW_PRIVATE:
g_warning ("%s: can't get coords for private windows", G_STRLOC);
break;
default:
g_warning ("%s: Unknown GtkTextWindowType", G_STRLOC);
break;
}
}
static void
set_window_width (GtkTextView *text_view,
gint width,
GtkTextWindowType type,
GtkTextWindow **winp)
{
if (width == 0)
{
if (*winp)
{
text_window_free (*winp);
*winp = NULL;
gtk_widget_queue_resize (GTK_WIDGET (text_view));
}
}
else
{
if (*winp == NULL)
{
*winp = text_window_new (type,
GTK_WIDGET (text_view),
width, 0);
/* if the widget is already realized we need to realize the child manually */
if (GTK_WIDGET_REALIZED (text_view))
text_window_realize (*winp, GTK_WIDGET (text_view)->window);
}
else
{
if ((*winp)->requisition.width == width)
return;
(*winp)->requisition.width = width;
}
gtk_widget_queue_resize (GTK_WIDGET (text_view));
}
}
static void
set_window_height (GtkTextView *text_view,
gint height,
GtkTextWindowType type,
GtkTextWindow **winp)
{
if (height == 0)
{
if (*winp)
{
text_window_free (*winp);
*winp = NULL;
gtk_widget_queue_resize (GTK_WIDGET (text_view));
}
}
else
{
if (*winp == NULL)
{
*winp = text_window_new (type,
GTK_WIDGET (text_view),
0, height);
/* if the widget is already realized we need to realize the child manually */
if (GTK_WIDGET_REALIZED (text_view))
text_window_realize (*winp, GTK_WIDGET (text_view)->window);
}
else
{
if ((*winp)->requisition.height == height)
return;
(*winp)->requisition.height = height;
}
gtk_widget_queue_resize (GTK_WIDGET (text_view));
}
}
/**
* gtk_text_view_set_border_window_size:
* @text_view: a #GtkTextView
* @type: window to affect
* @size: width or height of the window
*
* Sets the width of %GTK_TEXT_WINDOW_LEFT or %GTK_TEXT_WINDOW_RIGHT,
* or the height of %GTK_TEXT_WINDOW_TOP or %GTK_TEXT_WINDOW_BOTTOM.
* Automatically destroys the corresponding window if the size is set
* to 0, and creates the window if the size is set to non-zero. This
* function can only be used for the "border windows," it doesn't work
* with #GTK_TEXT_WINDOW_WIDGET, #GTK_TEXT_WINDOW_TEXT, or
* #GTK_TEXT_WINDOW_PRIVATE.
**/
void
gtk_text_view_set_border_window_size (GtkTextView *text_view,
GtkTextWindowType type,
gint size)
{
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
g_return_if_fail (size >= 0);
switch (type)
{
case GTK_TEXT_WINDOW_LEFT:
set_window_width (text_view, size, GTK_TEXT_WINDOW_LEFT,
&text_view->left_window);
break;
case GTK_TEXT_WINDOW_RIGHT:
set_window_width (text_view, size, GTK_TEXT_WINDOW_RIGHT,
&text_view->right_window);
break;
case GTK_TEXT_WINDOW_TOP:
set_window_height (text_view, size, GTK_TEXT_WINDOW_TOP,
&text_view->top_window);
break;
case GTK_TEXT_WINDOW_BOTTOM:
set_window_height (text_view, size, GTK_TEXT_WINDOW_BOTTOM,
&text_view->bottom_window);
break;
default:
g_warning ("Can only set size of left/right/top/bottom border windows with gtk_text_view_set_border_window_size()");
break;
}
}
/**
* gtk_text_view_get_border_window_size:
* @text_view: a #GtkTextView
* @type: window to return size from
*
* Gets the width of the specified border window. See
* gtk_text_view_set_border_window_size().
*
* Return value: width of window
**/
gint
gtk_text_view_get_border_window_size (GtkTextView *text_view,
GtkTextWindowType type)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), 0);
switch (type)
{
case GTK_TEXT_WINDOW_LEFT:
if (text_view->left_window)
return text_view->left_window->requisition.width;
break;
case GTK_TEXT_WINDOW_RIGHT:
if (text_view->right_window)
return text_view->right_window->requisition.width;
break;
case GTK_TEXT_WINDOW_TOP:
if (text_view->top_window)
return text_view->top_window->requisition.height;
break;
case GTK_TEXT_WINDOW_BOTTOM:
if (text_view->bottom_window)
return text_view->bottom_window->requisition.height;
break;
default:
g_warning ("Can only get size of left/right/top/bottom border windows with gtk_text_view_get_border_window_size()");
break;
}
return 0;
}
/*
* Child widgets
*/
static GtkTextViewChild*
text_view_child_new_anchored (GtkWidget *child,
GtkTextChildAnchor *anchor,
GtkTextLayout *layout)
{
GtkTextViewChild *vc;
vc = g_new (GtkTextViewChild, 1);
vc->type = GTK_TEXT_WINDOW_PRIVATE;
vc->widget = child;
vc->anchor = anchor;
vc->from_top_of_line = 0;
vc->from_left_of_buffer = 0;
g_object_ref (vc->widget);
g_object_ref (vc->anchor);
g_object_set_data (G_OBJECT (child),
I_("gtk-text-view-child"),
vc);
gtk_text_child_anchor_register_child (anchor, child, layout);
return vc;
}
static GtkTextViewChild*
text_view_child_new_window (GtkWidget *child,
GtkTextWindowType type,
gint x,
gint y)
{
GtkTextViewChild *vc;
vc = g_new (GtkTextViewChild, 1);
vc->widget = child;
vc->anchor = NULL;
vc->from_top_of_line = 0;
vc->from_left_of_buffer = 0;
g_object_ref (vc->widget);
vc->type = type;
vc->x = x;
vc->y = y;
g_object_set_data (G_OBJECT (child),
I_("gtk-text-view-child"),
vc);
return vc;
}
static void
text_view_child_free (GtkTextViewChild *child)
{
g_object_set_data (G_OBJECT (child->widget),
I_("gtk-text-view-child"), NULL);
if (child->anchor)
{
gtk_text_child_anchor_unregister_child (child->anchor,
child->widget);
g_object_unref (child->anchor);
}
g_object_unref (child->widget);
g_free (child);
}
static void
text_view_child_set_parent_window (GtkTextView *text_view,
GtkTextViewChild *vc)
{
if (vc->anchor)
gtk_widget_set_parent_window (vc->widget,
text_view->text_window->bin_window);
else
{
GdkWindow *window;
window = gtk_text_view_get_window (text_view,
vc->type);
gtk_widget_set_parent_window (vc->widget, window);
}
}
static void
add_child (GtkTextView *text_view,
GtkTextViewChild *vc)
{
text_view->children = g_slist_prepend (text_view->children,
vc);
if (GTK_WIDGET_REALIZED (text_view))
text_view_child_set_parent_window (text_view, vc);
gtk_widget_set_parent (vc->widget, GTK_WIDGET (text_view));
}
/**
* gtk_text_view_add_child_at_anchor:
* @text_view: a #GtkTextView
* @child: a #GtkWidget
* @anchor: a #GtkTextChildAnchor in the #GtkTextBuffer for @text_view
*
* Adds a child widget in the text buffer, at the given @anchor.
*
**/
void
gtk_text_view_add_child_at_anchor (GtkTextView *text_view,
GtkWidget *child,
GtkTextChildAnchor *anchor)
{
GtkTextViewChild *vc;
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
g_return_if_fail (child->parent == NULL);
gtk_text_view_ensure_layout (text_view);
vc = text_view_child_new_anchored (child, anchor,
text_view->layout);
add_child (text_view, vc);
g_assert (vc->widget == child);
g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (text_view));
}
/**
* gtk_text_view_add_child_in_window:
* @text_view: a #GtkTextView
* @child: a #GtkWidget
* @which_window: which window the child should appear in
* @xpos: X position of child in window coordinates
* @ypos: Y position of child in window coordinates
*
* Adds a child at fixed coordinates in one of the text widget's
* windows. The window must have nonzero size (see
* gtk_text_view_set_border_window_size()). Note that the child
* coordinates are given relative to the #GdkWindow in question, and
* that these coordinates have no sane relationship to scrolling. When
* placing a child in #GTK_TEXT_WINDOW_WIDGET, scrolling is
* irrelevant, the child floats above all scrollable areas. But when
* placing a child in one of the scrollable windows (border windows or
* text window), you'll need to compute the child's correct position
* in buffer coordinates any time scrolling occurs or buffer changes
* occur, and then call gtk_text_view_move_child() to update the
* child's position. Unfortunately there's no good way to detect that
* scrolling has occurred, using the current API; a possible hack
* would be to update all child positions when the scroll adjustments
* change or the text buffer changes. See bug 64518 on
* bugzilla.gnome.org for status of fixing this issue.
*
**/
void
gtk_text_view_add_child_in_window (GtkTextView *text_view,
GtkWidget *child,
GtkTextWindowType which_window,
gint xpos,
gint ypos)
{
GtkTextViewChild *vc;
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent == NULL);
vc = text_view_child_new_window (child, which_window,
xpos, ypos);
add_child (text_view, vc);
g_assert (vc->widget == child);
g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (text_view));
}
/**
* gtk_text_view_move_child:
* @text_view: a #GtkTextView
* @child: child widget already added to the text view
* @xpos: new X position in window coordinates
* @ypos: new Y position in window coordinates
*
* Updates the position of a child, as for gtk_text_view_add_child_in_window().
*
**/
void
gtk_text_view_move_child (GtkTextView *text_view,
GtkWidget *child,
gint xpos,
gint ypos)
{
GtkTextViewChild *vc;
g_return_if_fail (GTK_IS_TEXT_VIEW (text_view));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent == (GtkWidget*) text_view);
vc = g_object_get_data (G_OBJECT (child),
"gtk-text-view-child");
g_assert (vc != NULL);
if (vc->x == xpos &&
vc->y == ypos)
return;
vc->x = xpos;
vc->y = ypos;
if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (text_view))
gtk_widget_queue_resize (child);
}
/* Iterator operations */
/**
* gtk_text_view_forward_display_line:
* @text_view: a #GtkTextView
* @iter: a #GtkTextIter
*
* Moves the given @iter forward by one display (wrapped) line. A
* display line is different from a paragraph. Paragraphs are
* separated by newlines or other paragraph separator characters.
* Display lines are created by line-wrapping a paragraph. If
* wrapping is turned off, display lines and paragraphs will be the
* same. Display lines are divided differently for each view, since
* they depend on the view's width; paragraphs are the same in all
* views, since they depend on the contents of the #GtkTextBuffer.
*
* Return value: %TRUE if @iter was moved and is not on the end iterator
**/
gboolean
gtk_text_view_forward_display_line (GtkTextView *text_view,
GtkTextIter *iter)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
gtk_text_view_ensure_layout (text_view);
return gtk_text_layout_move_iter_to_next_line (text_view->layout, iter);
}
/**
* gtk_text_view_backward_display_line:
* @text_view: a #GtkTextView
* @iter: a #GtkTextIter
*
* Moves the given @iter backward by one display (wrapped) line. A
* display line is different from a paragraph. Paragraphs are
* separated by newlines or other paragraph separator characters.
* Display lines are created by line-wrapping a paragraph. If
* wrapping is turned off, display lines and paragraphs will be the
* same. Display lines are divided differently for each view, since
* they depend on the view's width; paragraphs are the same in all
* views, since they depend on the contents of the #GtkTextBuffer.
*
* Return value: %TRUE if @iter was moved and is not on the end iterator
**/
gboolean
gtk_text_view_backward_display_line (GtkTextView *text_view,
GtkTextIter *iter)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
gtk_text_view_ensure_layout (text_view);
return gtk_text_layout_move_iter_to_previous_line (text_view->layout, iter);
}
/**
* gtk_text_view_forward_display_line_end:
* @text_view: a #GtkTextView
* @iter: a #GtkTextIter
*
* Moves the given @iter forward to the next display line end. A
* display line is different from a paragraph. Paragraphs are
* separated by newlines or other paragraph separator characters.
* Display lines are created by line-wrapping a paragraph. If
* wrapping is turned off, display lines and paragraphs will be the
* same. Display lines are divided differently for each view, since
* they depend on the view's width; paragraphs are the same in all
* views, since they depend on the contents of the #GtkTextBuffer.
*
* Return value: %TRUE if @iter was moved and is not on the end iterator
**/
gboolean
gtk_text_view_forward_display_line_end (GtkTextView *text_view,
GtkTextIter *iter)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
gtk_text_view_ensure_layout (text_view);
return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, 1);
}
/**
* gtk_text_view_backward_display_line_start:
* @text_view: a #GtkTextView
* @iter: a #GtkTextIter
*
* Moves the given @iter backward to the next display line start. A
* display line is different from a paragraph. Paragraphs are
* separated by newlines or other paragraph separator characters.
* Display lines are created by line-wrapping a paragraph. If
* wrapping is turned off, display lines and paragraphs will be the
* same. Display lines are divided differently for each view, since
* they depend on the view's width; paragraphs are the same in all
* views, since they depend on the contents of the #GtkTextBuffer.
*
* Return value: %TRUE if @iter was moved and is not on the end iterator
**/
gboolean
gtk_text_view_backward_display_line_start (GtkTextView *text_view,
GtkTextIter *iter)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
gtk_text_view_ensure_layout (text_view);
return gtk_text_layout_move_iter_to_line_end (text_view->layout, iter, -1);
}
/**
* gtk_text_view_starts_display_line:
* @text_view: a #GtkTextView
* @iter: a #GtkTextIter
*
* Determines whether @iter is at the start of a display line.
* See gtk_text_view_forward_display_line() for an explanation of
* display lines vs. paragraphs.
*
* Return value: %TRUE if @iter begins a wrapped line
**/
gboolean
gtk_text_view_starts_display_line (GtkTextView *text_view,
const GtkTextIter *iter)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
gtk_text_view_ensure_layout (text_view);
return gtk_text_layout_iter_starts_line (text_view->layout, iter);
}
/**
* gtk_text_view_move_visually:
* @text_view: a #GtkTextView
* @iter: a #GtkTextIter
* @count: number of characters to move (negative moves left, positive moves right)
*
* Move the iterator a given number of characters visually, treating
* it as the strong cursor position. If @count is positive, then the
* new strong cursor position will be @count positions to the right of
* the old cursor position. If @count is negative then the new strong
* cursor position will be @count positions to the left of the old
* cursor position.
*
* In the presence of bidirection text, the correspondence
* between logical and visual order will depend on the direction
* of the current run, and there may be jumps when the cursor
* is moved off of the end of a run.
*
* Return value: %TRUE if @iter moved and is not on the end iterator
**/
gboolean
gtk_text_view_move_visually (GtkTextView *text_view,
GtkTextIter *iter,
gint count)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
gtk_text_view_ensure_layout (text_view);
return gtk_text_layout_move_iter_visually (text_view->layout, iter, count);
}
#define __GTK_TEXT_VIEW_C__
#include "gtkaliasdef.c"
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