3696 lines
109 KiB
C
3696 lines
109 KiB
C
/* GTK - The GIMP Toolkit
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* gtktextlayout.c - calculate the layout of the text
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*
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* Copyright (c) 1992-1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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* Copyright (c) 2000 Red Hat, Inc.
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* Tk->Gtk port by Havoc Pennington
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* Pango support by Owen Taylor
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*
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* This file can be used under your choice of two licenses, the LGPL
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* and the original Tk license.
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*
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* LGPL:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Original Tk license:
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*
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* This software is copyrighted by the Regents of the University of
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* California, Sun Microsystems, Inc., and other parties. The
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* following terms apply to all files associated with the software
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* unless explicitly disclaimed in individual files.
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*
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* The authors hereby grant permission to use, copy, modify,
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* distribute, and license this software and its documentation for any
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* purpose, provided that existing copyright notices are retained in
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* all copies and that this notice is included verbatim in any
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* distributions. No written agreement, license, or royalty fee is
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* required for any of the authorized uses. Modifications to this
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* software may be copyrighted by their authors and need not follow
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* the licensing terms described here, provided that the new terms are
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* clearly indicated on the first page of each file where they apply.
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*
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* IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
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* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
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* DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
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* OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
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* NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
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* AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
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* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* GOVERNMENT USE: If you are acquiring this software on behalf of the
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* U.S. government, the Government shall have only "Restricted Rights"
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* in the software and related documentation as defined in the Federal
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* Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
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* are acquiring the software on behalf of the Department of Defense,
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* the software shall be classified as "Commercial Computer Software"
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* and the Government shall have only "Restricted Rights" as defined
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* in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
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* foregoing, the authors grant the U.S. Government and others acting
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* in its behalf permission to use and distribute the software in
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* accordance with the terms specified in this license.
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*
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
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#include "config.h"
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#include "gtkmarshalers.h"
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#include "gtktextlayout.h"
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#include "gtktextbtree.h"
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#include "gtktextiterprivate.h"
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#include "gtktextutil.h"
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#include "gtkintl.h"
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#include "gtkalias.h"
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#include <stdlib.h>
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#include <string.h>
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#define GTK_TEXT_LAYOUT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_TEXT_LAYOUT, GtkTextLayoutPrivate))
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typedef struct _GtkTextLayoutPrivate GtkTextLayoutPrivate;
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struct _GtkTextLayoutPrivate
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{
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/* Cache the line that the cursor is positioned on, as the keyboard
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direction only influences the direction of the cursor line.
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*/
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GtkTextLine *cursor_line;
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};
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static GtkTextLineData *gtk_text_layout_real_wrap (GtkTextLayout *layout,
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GtkTextLine *line,
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/* may be NULL */
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GtkTextLineData *line_data);
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static void gtk_text_layout_invalidated (GtkTextLayout *layout);
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static void gtk_text_layout_real_invalidate (GtkTextLayout *layout,
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const GtkTextIter *start,
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const GtkTextIter *end);
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static void gtk_text_layout_real_invalidate_cursors(GtkTextLayout *layout,
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const GtkTextIter *start,
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const GtkTextIter *end);
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static void gtk_text_layout_invalidate_cache (GtkTextLayout *layout,
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GtkTextLine *line,
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gboolean cursors_only);
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static void gtk_text_layout_invalidate_cursor_line (GtkTextLayout *layout,
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gboolean cursors_only);
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static void gtk_text_layout_real_free_line_data (GtkTextLayout *layout,
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GtkTextLine *line,
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GtkTextLineData *line_data);
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static void gtk_text_layout_emit_changed (GtkTextLayout *layout,
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gint y,
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gint old_height,
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gint new_height);
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static void gtk_text_layout_invalidate_all (GtkTextLayout *layout);
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static PangoAttribute *gtk_text_attr_appearance_new (const GtkTextAppearance *appearance);
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static void gtk_text_layout_mark_set_handler (GtkTextBuffer *buffer,
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const GtkTextIter *location,
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GtkTextMark *mark,
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gpointer data);
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static void gtk_text_layout_buffer_insert_text (GtkTextBuffer *textbuffer,
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GtkTextIter *iter,
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gchar *str,
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gint len,
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gpointer data);
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static void gtk_text_layout_buffer_delete_range (GtkTextBuffer *textbuffer,
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GtkTextIter *start,
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GtkTextIter *end,
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gpointer data);
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static void gtk_text_layout_update_cursor_line (GtkTextLayout *layout);
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enum {
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INVALIDATED,
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CHANGED,
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ALLOCATE_CHILD,
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LAST_SIGNAL
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};
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enum {
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ARG_0,
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LAST_ARG
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};
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#define PIXEL_BOUND(d) (((d) + PANGO_SCALE - 1) / PANGO_SCALE)
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static void gtk_text_layout_finalize (GObject *object);
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static guint signals[LAST_SIGNAL] = { 0 };
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PangoAttrType gtk_text_attr_appearance_type = 0;
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G_DEFINE_TYPE (GtkTextLayout, gtk_text_layout, G_TYPE_OBJECT)
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static void
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gtk_text_layout_class_init (GtkTextLayoutClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = gtk_text_layout_finalize;
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klass->wrap = gtk_text_layout_real_wrap;
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klass->invalidate = gtk_text_layout_real_invalidate;
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klass->invalidate_cursors = gtk_text_layout_real_invalidate_cursors;
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klass->free_line_data = gtk_text_layout_real_free_line_data;
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signals[INVALIDATED] =
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g_signal_new (I_("invalidated"),
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G_OBJECT_CLASS_TYPE (object_class),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkTextLayoutClass, invalidated),
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NULL, NULL,
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_gtk_marshal_VOID__VOID,
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G_TYPE_NONE,
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0);
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signals[CHANGED] =
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g_signal_new (I_("changed"),
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G_OBJECT_CLASS_TYPE (object_class),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkTextLayoutClass, changed),
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NULL, NULL,
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_gtk_marshal_VOID__INT_INT_INT,
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G_TYPE_NONE,
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3,
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G_TYPE_INT,
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G_TYPE_INT,
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G_TYPE_INT);
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signals[ALLOCATE_CHILD] =
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g_signal_new (I_("allocate_child"),
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G_OBJECT_CLASS_TYPE (object_class),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkTextLayoutClass, allocate_child),
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NULL, NULL,
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_gtk_marshal_VOID__OBJECT_INT_INT,
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G_TYPE_NONE,
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3,
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GTK_TYPE_OBJECT,
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G_TYPE_INT,
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G_TYPE_INT);
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g_type_class_add_private (object_class, sizeof (GtkTextLayoutPrivate));
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}
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static void
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gtk_text_layout_init (GtkTextLayout *text_layout)
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{
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text_layout->cursor_visible = TRUE;
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}
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GtkTextLayout*
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gtk_text_layout_new (void)
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{
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return g_object_new (GTK_TYPE_TEXT_LAYOUT, NULL);
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}
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static void
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free_style_cache (GtkTextLayout *text_layout)
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{
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if (text_layout->one_style_cache)
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{
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gtk_text_attributes_unref (text_layout->one_style_cache);
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text_layout->one_style_cache = NULL;
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}
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}
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static void
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gtk_text_layout_finalize (GObject *object)
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{
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GtkTextLayout *layout;
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layout = GTK_TEXT_LAYOUT (object);
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gtk_text_layout_set_buffer (layout, NULL);
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if (layout->default_style)
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gtk_text_attributes_unref (layout->default_style);
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layout->default_style = NULL;
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if (layout->ltr_context)
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{
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g_object_unref (layout->ltr_context);
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layout->ltr_context = NULL;
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}
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if (layout->rtl_context)
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{
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g_object_unref (layout->rtl_context);
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layout->rtl_context = NULL;
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}
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if (layout->one_display_cache)
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{
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GtkTextLineDisplay *tmp_display = layout->one_display_cache;
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layout->one_display_cache = NULL;
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gtk_text_layout_free_line_display (layout, tmp_display);
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}
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if (layout->preedit_string)
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{
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g_free (layout->preedit_string);
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layout->preedit_string = NULL;
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}
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if (layout->preedit_attrs)
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{
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pango_attr_list_unref (layout->preedit_attrs);
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layout->preedit_attrs = NULL;
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}
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(* G_OBJECT_CLASS (gtk_text_layout_parent_class)->finalize) (object);
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}
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void
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gtk_text_layout_set_buffer (GtkTextLayout *layout,
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GtkTextBuffer *buffer)
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{
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
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if (layout->buffer == buffer)
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return;
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free_style_cache (layout);
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if (layout->buffer)
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{
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_gtk_text_btree_remove_view (_gtk_text_buffer_get_btree (layout->buffer),
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layout);
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g_signal_handlers_disconnect_by_func (layout->buffer,
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G_CALLBACK (gtk_text_layout_mark_set_handler),
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layout);
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g_signal_handlers_disconnect_by_func (layout->buffer,
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G_CALLBACK (gtk_text_layout_buffer_insert_text),
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layout);
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g_signal_handlers_disconnect_by_func (layout->buffer,
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G_CALLBACK (gtk_text_layout_buffer_delete_range),
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layout);
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g_object_unref (layout->buffer);
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layout->buffer = NULL;
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}
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if (buffer)
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{
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layout->buffer = buffer;
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g_object_ref (buffer);
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_gtk_text_btree_add_view (_gtk_text_buffer_get_btree (buffer), layout);
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/* Bind to all signals that move the insert mark. */
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g_signal_connect_after (layout->buffer, "mark_set",
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G_CALLBACK (gtk_text_layout_mark_set_handler), layout);
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g_signal_connect_after (layout->buffer, "insert_text",
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G_CALLBACK (gtk_text_layout_buffer_insert_text), layout);
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g_signal_connect_after (layout->buffer, "delete_range",
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G_CALLBACK (gtk_text_layout_buffer_delete_range), layout);
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gtk_text_layout_update_cursor_line (layout);
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}
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}
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void
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gtk_text_layout_default_style_changed (GtkTextLayout *layout)
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{
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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DV (g_print ("invalidating all due to default style change (%s)\n", G_STRLOC));
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gtk_text_layout_invalidate_all (layout);
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}
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void
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gtk_text_layout_set_default_style (GtkTextLayout *layout,
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GtkTextAttributes *values)
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{
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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g_return_if_fail (values != NULL);
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if (values == layout->default_style)
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return;
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gtk_text_attributes_ref (values);
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if (layout->default_style)
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gtk_text_attributes_unref (layout->default_style);
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layout->default_style = values;
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gtk_text_layout_default_style_changed (layout);
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}
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void
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gtk_text_layout_set_contexts (GtkTextLayout *layout,
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PangoContext *ltr_context,
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PangoContext *rtl_context)
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{
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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if (layout->ltr_context != ltr_context)
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{
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if (layout->ltr_context)
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g_object_unref (layout->ltr_context);
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layout->ltr_context = ltr_context;
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g_object_ref (layout->ltr_context);
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}
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if (layout->rtl_context != rtl_context)
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{
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if (layout->rtl_context)
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g_object_unref (layout->rtl_context);
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layout->rtl_context = rtl_context;
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g_object_ref (layout->rtl_context);
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}
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DV (g_print ("invalidating all due to new pango contexts (%s)\n", G_STRLOC));
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gtk_text_layout_invalidate_all (layout);
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}
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/**
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* gtk_text_layout_set_overwrite_mode:
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* @layout: a #GtkTextLayout
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* @overwrite: overwrite mode
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*
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* Sets overwrite mode
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**/
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void
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gtk_text_layout_set_overwrite_mode (GtkTextLayout *layout,
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gboolean overwrite)
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{
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overwrite = overwrite != 0;
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if (overwrite != layout->overwrite_mode)
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{
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layout->overwrite_mode = overwrite;
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gtk_text_layout_invalidate_cursor_line (layout, TRUE);
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}
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}
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/**
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* gtk_text_layout_set_cursor_direction:
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* @direction: the new direction(s) for which to draw cursors.
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* %GTK_TEXT_DIR_NONE means draw cursors for both
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* left-to-right insertion and right-to-left insertion.
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* (The two cursors will be visually distinguished.)
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*
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* Sets which text directions (left-to-right and/or right-to-left) for
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* which cursors will be drawn for the insertion point. The visual
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* point at which new text is inserted depends on whether the new
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* text is right-to-left or left-to-right, so it may be desired to
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* make the drawn position of the cursor depend on the keyboard state.
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**/
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void
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gtk_text_layout_set_cursor_direction (GtkTextLayout *layout,
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GtkTextDirection direction)
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{
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if (direction != layout->cursor_direction)
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{
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layout->cursor_direction = direction;
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gtk_text_layout_invalidate_cursor_line (layout, TRUE);
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}
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}
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|
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/**
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* gtk_text_layout_set_keyboard_direction:
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* @keyboard_dir: the current direction of the keyboard.
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*
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* Sets the keyboard direction; this is used as for the bidirectional
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* base direction for the line with the cursor if the line contains
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* only neutral characters.
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**/
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void
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gtk_text_layout_set_keyboard_direction (GtkTextLayout *layout,
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GtkTextDirection keyboard_dir)
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{
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if (keyboard_dir != layout->keyboard_direction)
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{
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layout->keyboard_direction = keyboard_dir;
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gtk_text_layout_invalidate_cursor_line (layout, TRUE);
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}
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}
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|
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/**
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|
* gtk_text_layout_get_buffer:
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* @layout: a #GtkTextLayout
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*
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* Gets the text buffer used by the layout. See
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* gtk_text_layout_set_buffer().
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*
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* Return value: the text buffer used by the layout.
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**/
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GtkTextBuffer *
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gtk_text_layout_get_buffer (GtkTextLayout *layout)
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{
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g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
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return layout->buffer;
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}
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void
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gtk_text_layout_set_screen_width (GtkTextLayout *layout, gint width)
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{
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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g_return_if_fail (width >= 0);
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g_return_if_fail (layout->wrap_loop_count == 0);
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if (layout->screen_width == width)
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return;
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layout->screen_width = width;
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DV (g_print ("invalidating all due to new screen width (%s)\n", G_STRLOC));
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gtk_text_layout_invalidate_all (layout);
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}
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/**
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* gtk_text_layout_set_cursor_visible:
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* @layout: a #GtkTextLayout
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* @cursor_visible: If %FALSE, then the insertion cursor will not
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* be shown, even if the text is editable.
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|
*
|
|
* Sets whether the insertion cursor should be shown. Generally,
|
|
* widgets using #GtkTextLayout will hide the cursor when the
|
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* widget does not have the input focus.
|
|
**/
|
|
void
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gtk_text_layout_set_cursor_visible (GtkTextLayout *layout,
|
|
gboolean cursor_visible)
|
|
{
|
|
cursor_visible = (cursor_visible != FALSE);
|
|
|
|
if (layout->cursor_visible != cursor_visible)
|
|
{
|
|
GtkTextIter iter;
|
|
gint y, height;
|
|
|
|
layout->cursor_visible = cursor_visible;
|
|
|
|
/* Now queue a redraw on the paragraph containing the cursor
|
|
*/
|
|
gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
|
|
gtk_text_buffer_get_insert (layout->buffer));
|
|
|
|
gtk_text_layout_get_line_yrange (layout, &iter, &y, &height);
|
|
gtk_text_layout_emit_changed (layout, y, height, height);
|
|
|
|
gtk_text_layout_invalidate_cache (layout, _gtk_text_iter_get_text_line (&iter), TRUE);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_get_cursor_visible:
|
|
* @layout: a #GtkTextLayout
|
|
*
|
|
* Returns whether the insertion cursor will be shown.
|
|
*
|
|
* Return value: if %FALSE, the insertion cursor will not be
|
|
shown, even if the text is editable.
|
|
**/
|
|
gboolean
|
|
gtk_text_layout_get_cursor_visible (GtkTextLayout *layout)
|
|
{
|
|
return layout->cursor_visible;
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_set_preedit_string:
|
|
* @layout: a #PangoLayout
|
|
* @preedit_string: a string to display at the insertion point
|
|
* @preedit_attrs: a #PangoAttrList of attributes that apply to @preedit_string
|
|
* @cursor_pos: position of cursor within preedit string in chars
|
|
*
|
|
* Set the preedit string and attributes. The preedit string is a
|
|
* string showing text that is currently being edited and not
|
|
* yet committed into the buffer.
|
|
**/
|
|
void
|
|
gtk_text_layout_set_preedit_string (GtkTextLayout *layout,
|
|
const gchar *preedit_string,
|
|
PangoAttrList *preedit_attrs,
|
|
gint cursor_pos)
|
|
{
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (preedit_attrs != NULL || preedit_string == NULL);
|
|
|
|
g_free (layout->preedit_string);
|
|
|
|
if (layout->preedit_attrs)
|
|
pango_attr_list_unref (layout->preedit_attrs);
|
|
|
|
if (preedit_string)
|
|
{
|
|
layout->preedit_string = g_strdup (preedit_string);
|
|
layout->preedit_len = strlen (layout->preedit_string);
|
|
pango_attr_list_ref (preedit_attrs);
|
|
layout->preedit_attrs = preedit_attrs;
|
|
|
|
cursor_pos = CLAMP (cursor_pos, 0, g_utf8_strlen (layout->preedit_string, -1));
|
|
layout->preedit_cursor = g_utf8_offset_to_pointer (layout->preedit_string, cursor_pos) - layout->preedit_string;
|
|
}
|
|
else
|
|
{
|
|
layout->preedit_string = NULL;
|
|
layout->preedit_len = 0;
|
|
layout->preedit_attrs = NULL;
|
|
layout->preedit_cursor = 0;
|
|
}
|
|
|
|
gtk_text_layout_invalidate_cursor_line (layout, FALSE);
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_get_size (GtkTextLayout *layout,
|
|
gint *width,
|
|
gint *height)
|
|
{
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
|
|
if (width)
|
|
*width = layout->width;
|
|
|
|
if (height)
|
|
*height = layout->height;
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_invalidated (GtkTextLayout *layout)
|
|
{
|
|
g_signal_emit (layout, signals[INVALIDATED], 0);
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_emit_changed (GtkTextLayout *layout,
|
|
gint y,
|
|
gint old_height,
|
|
gint new_height)
|
|
{
|
|
g_signal_emit (layout, signals[CHANGED], 0, y, old_height, new_height);
|
|
}
|
|
|
|
static void
|
|
text_layout_changed (GtkTextLayout *layout,
|
|
gint y,
|
|
gint old_height,
|
|
gint new_height,
|
|
gboolean cursors_only)
|
|
{
|
|
/* Check if the range intersects our cached line display,
|
|
* and invalidate the cached line if so.
|
|
*/
|
|
if (layout->one_display_cache)
|
|
{
|
|
GtkTextLine *line = layout->one_display_cache->line;
|
|
gint cache_y = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
gint cache_height = layout->one_display_cache->height;
|
|
|
|
if (cache_y + cache_height > y && cache_y < y + old_height)
|
|
gtk_text_layout_invalidate_cache (layout, line, cursors_only);
|
|
}
|
|
|
|
gtk_text_layout_emit_changed (layout, y, old_height, new_height);
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_changed (GtkTextLayout *layout,
|
|
gint y,
|
|
gint old_height,
|
|
gint new_height)
|
|
{
|
|
text_layout_changed (layout, y, old_height, new_height, FALSE);
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_cursors_changed (GtkTextLayout *layout,
|
|
gint y,
|
|
gint old_height,
|
|
gint new_height)
|
|
{
|
|
text_layout_changed (layout, y, old_height, new_height, TRUE);
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_free_line_data (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
GtkTextLineData *line_data)
|
|
{
|
|
(* GTK_TEXT_LAYOUT_GET_CLASS (layout)->free_line_data)
|
|
(layout, line, line_data);
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_invalidate (GtkTextLayout *layout,
|
|
const GtkTextIter *start_index,
|
|
const GtkTextIter *end_index)
|
|
{
|
|
(* GTK_TEXT_LAYOUT_GET_CLASS (layout)->invalidate)
|
|
(layout, start_index, end_index);
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_invalidate_cursors (GtkTextLayout *layout,
|
|
const GtkTextIter *start_index,
|
|
const GtkTextIter *end_index)
|
|
{
|
|
(* GTK_TEXT_LAYOUT_GET_CLASS (layout)->invalidate_cursors)
|
|
(layout, start_index, end_index);
|
|
}
|
|
|
|
GtkTextLineData*
|
|
gtk_text_layout_wrap (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
/* may be NULL */
|
|
GtkTextLineData *line_data)
|
|
{
|
|
return (* GTK_TEXT_LAYOUT_GET_CLASS (layout)->wrap) (layout, line, line_data);
|
|
}
|
|
|
|
GSList*
|
|
gtk_text_layout_get_lines (GtkTextLayout *layout,
|
|
/* [top_y, bottom_y) */
|
|
gint top_y,
|
|
gint bottom_y,
|
|
gint *first_line_y)
|
|
{
|
|
GtkTextLine *first_btree_line;
|
|
GtkTextLine *last_btree_line;
|
|
GtkTextLine *line;
|
|
GSList *retval;
|
|
|
|
g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
|
|
g_return_val_if_fail (bottom_y > top_y, NULL);
|
|
|
|
retval = NULL;
|
|
|
|
first_btree_line =
|
|
_gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout, top_y, first_line_y);
|
|
if (first_btree_line == NULL)
|
|
{
|
|
/* off the bottom */
|
|
return NULL;
|
|
}
|
|
|
|
/* -1 since bottom_y is one past */
|
|
last_btree_line =
|
|
_gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout, bottom_y - 1, NULL);
|
|
|
|
if (!last_btree_line)
|
|
last_btree_line =
|
|
_gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
|
|
|
|
g_assert (last_btree_line != NULL);
|
|
|
|
line = first_btree_line;
|
|
while (TRUE)
|
|
{
|
|
retval = g_slist_prepend (retval, line);
|
|
|
|
if (line == last_btree_line)
|
|
break;
|
|
|
|
line = _gtk_text_line_next_excluding_last (line);
|
|
}
|
|
|
|
retval = g_slist_reverse (retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void
|
|
invalidate_cached_style (GtkTextLayout *layout)
|
|
{
|
|
free_style_cache (layout);
|
|
}
|
|
|
|
/* These should be called around a loop which wraps a CONTIGUOUS bunch
|
|
* of display lines. If the lines aren't contiguous you can't call
|
|
* these.
|
|
*/
|
|
void
|
|
gtk_text_layout_wrap_loop_start (GtkTextLayout *layout)
|
|
{
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (layout->one_style_cache == NULL);
|
|
|
|
layout->wrap_loop_count += 1;
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_wrap_loop_end (GtkTextLayout *layout)
|
|
{
|
|
g_return_if_fail (layout->wrap_loop_count > 0);
|
|
|
|
layout->wrap_loop_count -= 1;
|
|
|
|
if (layout->wrap_loop_count == 0)
|
|
{
|
|
/* We cache a some stuff if we're iterating over some lines wrapping
|
|
* them. This cleans it up.
|
|
*/
|
|
/* Nuke our cached style */
|
|
invalidate_cached_style (layout);
|
|
g_assert (layout->one_style_cache == NULL);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_invalidate_all (GtkTextLayout *layout)
|
|
{
|
|
GtkTextIter start;
|
|
GtkTextIter end;
|
|
|
|
if (layout->buffer == NULL)
|
|
return;
|
|
|
|
gtk_text_buffer_get_bounds (layout->buffer, &start, &end);
|
|
|
|
gtk_text_layout_invalidate (layout, &start, &end);
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_invalidate_cache (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
gboolean cursors_only)
|
|
{
|
|
if (layout->one_display_cache && line == layout->one_display_cache->line)
|
|
{
|
|
GtkTextLineDisplay *display = layout->one_display_cache;
|
|
|
|
if (cursors_only)
|
|
{
|
|
g_slist_foreach (display->cursors, (GFunc)g_free, NULL);
|
|
g_slist_free (display->cursors);
|
|
display->cursors = NULL;
|
|
display->cursors_invalid = TRUE;
|
|
display->has_block_cursor = FALSE;
|
|
}
|
|
else
|
|
{
|
|
layout->one_display_cache = NULL;
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now invalidate the paragraph containing the cursor
|
|
*/
|
|
static void
|
|
gtk_text_layout_invalidate_cursor_line (GtkTextLayout *layout,
|
|
gboolean cursors_only)
|
|
{
|
|
GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout);
|
|
GtkTextLineData *line_data;
|
|
|
|
if (priv->cursor_line == NULL)
|
|
return;
|
|
|
|
line_data = _gtk_text_line_get_data (priv->cursor_line, layout);
|
|
if (line_data)
|
|
{
|
|
if (cursors_only)
|
|
gtk_text_layout_invalidate_cache (layout, priv->cursor_line, TRUE);
|
|
else
|
|
{
|
|
gtk_text_layout_invalidate_cache (layout, priv->cursor_line, FALSE);
|
|
_gtk_text_line_invalidate_wrap (priv->cursor_line, line_data);
|
|
}
|
|
|
|
gtk_text_layout_invalidated (layout);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_update_cursor_line(GtkTextLayout *layout)
|
|
{
|
|
GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout);
|
|
GtkTextIter iter;
|
|
|
|
gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
|
|
gtk_text_buffer_get_insert (layout->buffer));
|
|
|
|
priv->cursor_line = _gtk_text_iter_get_text_line (&iter);
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_real_invalidate (GtkTextLayout *layout,
|
|
const GtkTextIter *start,
|
|
const GtkTextIter *end)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLine *last_line;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (layout->wrap_loop_count == 0);
|
|
|
|
/* Because we may be invalidating a mark, it's entirely possible
|
|
* that gtk_text_iter_equal (start, end) in which case we
|
|
* should still invalidate the line they are both on. i.e.
|
|
* we always invalidate the line with "start" even
|
|
* if there's an empty range.
|
|
*/
|
|
|
|
#if 0
|
|
gtk_text_view_index_spew (start_index, "invalidate start");
|
|
gtk_text_view_index_spew (end_index, "invalidate end");
|
|
#endif
|
|
|
|
last_line = _gtk_text_iter_get_text_line (end);
|
|
line = _gtk_text_iter_get_text_line (start);
|
|
|
|
while (TRUE)
|
|
{
|
|
GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
|
|
|
|
gtk_text_layout_invalidate_cache (layout, line, FALSE);
|
|
|
|
if (line_data)
|
|
_gtk_text_line_invalidate_wrap (line, line_data);
|
|
|
|
if (line == last_line)
|
|
break;
|
|
|
|
line = _gtk_text_line_next_excluding_last (line);
|
|
}
|
|
|
|
gtk_text_layout_invalidated (layout);
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_real_invalidate_cursors (GtkTextLayout *layout,
|
|
const GtkTextIter *start,
|
|
const GtkTextIter *end)
|
|
{
|
|
/* Check if the range intersects our cached line display,
|
|
* and invalidate the cached line if so.
|
|
*/
|
|
if (layout->one_display_cache)
|
|
{
|
|
GtkTextIter line_start, line_end;
|
|
GtkTextLine *line = layout->one_display_cache->line;
|
|
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
&line_start, line, 0);
|
|
line_end = line_start;
|
|
if (!gtk_text_iter_ends_line (&line_end))
|
|
gtk_text_iter_forward_to_line_end (&line_end);
|
|
|
|
if (gtk_text_iter_compare (start, end) > 0)
|
|
{
|
|
const GtkTextIter *tmp = start;
|
|
start = end;
|
|
end = tmp;
|
|
}
|
|
|
|
if (gtk_text_iter_compare (&line_start, end) <= 0 &&
|
|
gtk_text_iter_compare (start, &line_end) <= 0)
|
|
{
|
|
gtk_text_layout_invalidate_cache (layout, line, TRUE);
|
|
}
|
|
}
|
|
|
|
gtk_text_layout_invalidated (layout);
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_real_free_line_data (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
GtkTextLineData *line_data)
|
|
{
|
|
gtk_text_layout_invalidate_cache (layout, line, FALSE);
|
|
|
|
g_free (line_data);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_is_valid:
|
|
* @layout: a #GtkTextLayout
|
|
*
|
|
* Check if there are any invalid regions in a #GtkTextLayout's buffer
|
|
*
|
|
* Return value: %TRUE if any invalid regions were found
|
|
**/
|
|
gboolean
|
|
gtk_text_layout_is_valid (GtkTextLayout *layout)
|
|
{
|
|
g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
|
|
|
|
return _gtk_text_btree_is_valid (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout);
|
|
}
|
|
|
|
static void
|
|
update_layout_size (GtkTextLayout *layout)
|
|
{
|
|
_gtk_text_btree_get_view_size (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout,
|
|
&layout->width, &layout->height);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_validate_yrange:
|
|
* @layout: a #GtkTextLayout
|
|
* @anchor: iter pointing into a line that will be used as the
|
|
* coordinate origin
|
|
* @y0_: offset from the top of the line pointed to by @anchor at
|
|
* which to begin validation. (The offset here is in pixels
|
|
* after validation.)
|
|
* @y1_: offset from the top of the line pointed to by @anchor at
|
|
* which to end validation. (The offset here is in pixels
|
|
* after validation.)
|
|
*
|
|
* Ensure that a region of a #GtkTextLayout is valid. The ::changed
|
|
* signal will be emitted if any lines are validated.
|
|
**/
|
|
void
|
|
gtk_text_layout_validate_yrange (GtkTextLayout *layout,
|
|
GtkTextIter *anchor,
|
|
gint y0,
|
|
gint y1)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLine *first_line = NULL;
|
|
GtkTextLine *last_line = NULL;
|
|
gint seen;
|
|
gint delta_height = 0;
|
|
gint first_line_y = 0; /* Quiet GCC */
|
|
gint last_line_y = 0; /* Quiet GCC */
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
|
|
if (y0 > 0)
|
|
y0 = 0;
|
|
if (y1 < 0)
|
|
y1 = 0;
|
|
|
|
/* Validate backwards from the anchor line to y0
|
|
*/
|
|
line = _gtk_text_iter_get_text_line (anchor);
|
|
line = _gtk_text_line_previous (line);
|
|
seen = 0;
|
|
while (line && seen < -y0)
|
|
{
|
|
GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
|
|
if (!line_data || !line_data->valid)
|
|
{
|
|
gint old_height, new_height;
|
|
|
|
old_height = line_data ? line_data->height : 0;
|
|
|
|
_gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
line_data = _gtk_text_line_get_data (line, layout);
|
|
|
|
new_height = line_data ? line_data->height : 0;
|
|
|
|
delta_height += new_height - old_height;
|
|
|
|
first_line = line;
|
|
first_line_y = -seen - new_height;
|
|
if (!last_line)
|
|
{
|
|
last_line = line;
|
|
last_line_y = -seen;
|
|
}
|
|
}
|
|
|
|
seen += line_data ? line_data->height : 0;
|
|
line = _gtk_text_line_previous (line);
|
|
}
|
|
|
|
/* Validate forwards to y1 */
|
|
line = _gtk_text_iter_get_text_line (anchor);
|
|
seen = 0;
|
|
while (line && seen < y1)
|
|
{
|
|
GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
|
|
if (!line_data || !line_data->valid)
|
|
{
|
|
gint old_height, new_height;
|
|
|
|
old_height = line_data ? line_data->height : 0;
|
|
|
|
_gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
line_data = _gtk_text_line_get_data (line, layout);
|
|
new_height = line_data ? line_data->height : 0;
|
|
|
|
delta_height += new_height - old_height;
|
|
|
|
if (!first_line)
|
|
{
|
|
first_line = line;
|
|
first_line_y = seen;
|
|
}
|
|
last_line = line;
|
|
last_line_y = seen + new_height;
|
|
}
|
|
|
|
seen += line_data ? line_data->height : 0;
|
|
line = _gtk_text_line_next_excluding_last (line);
|
|
}
|
|
|
|
/* If we found and validated any invalid lines, update size and
|
|
* emit the changed signal
|
|
*/
|
|
if (first_line)
|
|
{
|
|
gint line_top;
|
|
|
|
update_layout_size (layout);
|
|
|
|
line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
first_line, layout);
|
|
|
|
gtk_text_layout_emit_changed (layout,
|
|
line_top,
|
|
last_line_y - first_line_y - delta_height,
|
|
last_line_y - first_line_y);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_validate:
|
|
* @tree: a #GtkTextLayout
|
|
* @max_pixels: the maximum number of pixels to validate. (No more
|
|
* than one paragraph beyond this limit will be validated)
|
|
*
|
|
* Validate regions of a #GtkTextLayout. The ::changed signal will
|
|
* be emitted for each region validated.
|
|
**/
|
|
void
|
|
gtk_text_layout_validate (GtkTextLayout *layout,
|
|
gint max_pixels)
|
|
{
|
|
gint y, old_height, new_height;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
|
|
while (max_pixels > 0 &&
|
|
_gtk_text_btree_validate (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout, max_pixels,
|
|
&y, &old_height, &new_height))
|
|
{
|
|
max_pixels -= new_height;
|
|
|
|
update_layout_size (layout);
|
|
gtk_text_layout_emit_changed (layout, y, old_height, new_height);
|
|
}
|
|
}
|
|
|
|
static GtkTextLineData*
|
|
gtk_text_layout_real_wrap (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
/* may be NULL */
|
|
GtkTextLineData *line_data)
|
|
{
|
|
GtkTextLineDisplay *display;
|
|
|
|
g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
|
|
g_return_val_if_fail (line != NULL, NULL);
|
|
|
|
if (line_data == NULL)
|
|
{
|
|
line_data = _gtk_text_line_data_new (layout, line);
|
|
_gtk_text_line_add_data (line, line_data);
|
|
}
|
|
|
|
display = gtk_text_layout_get_line_display (layout, line, TRUE);
|
|
line_data->width = display->width;
|
|
line_data->height = display->height;
|
|
line_data->valid = TRUE;
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
return line_data;
|
|
}
|
|
|
|
/*
|
|
* Layout utility functions
|
|
*/
|
|
|
|
/* If you get the style with get_style () you need to call
|
|
release_style () to free it. */
|
|
static GtkTextAttributes*
|
|
get_style (GtkTextLayout *layout,
|
|
GPtrArray *tags)
|
|
{
|
|
GtkTextAttributes *style;
|
|
|
|
/* If we have the one-style cache, then it means
|
|
that we haven't seen a toggle since we filled in the
|
|
one-style cache.
|
|
*/
|
|
if (layout->one_style_cache != NULL)
|
|
{
|
|
gtk_text_attributes_ref (layout->one_style_cache);
|
|
return layout->one_style_cache;
|
|
}
|
|
|
|
g_assert (layout->one_style_cache == NULL);
|
|
|
|
/* No tags, use default style */
|
|
if (tags == NULL || tags->len == 0)
|
|
{
|
|
/* One ref for the return value, one ref for the
|
|
layout->one_style_cache reference */
|
|
gtk_text_attributes_ref (layout->default_style);
|
|
gtk_text_attributes_ref (layout->default_style);
|
|
layout->one_style_cache = layout->default_style;
|
|
|
|
return layout->default_style;
|
|
}
|
|
|
|
style = gtk_text_attributes_new ();
|
|
|
|
gtk_text_attributes_copy_values (layout->default_style,
|
|
style);
|
|
|
|
_gtk_text_attributes_fill_from_tags (style,
|
|
(GtkTextTag**) tags->pdata,
|
|
tags->len);
|
|
|
|
g_assert (style->refcount == 1);
|
|
|
|
/* Leave this style as the last one seen */
|
|
g_assert (layout->one_style_cache == NULL);
|
|
gtk_text_attributes_ref (style); /* ref held by layout->one_style_cache */
|
|
layout->one_style_cache = style;
|
|
|
|
/* Returning yet another refcount */
|
|
return style;
|
|
}
|
|
|
|
static void
|
|
release_style (GtkTextLayout *layout,
|
|
GtkTextAttributes *style)
|
|
{
|
|
g_return_if_fail (style != NULL);
|
|
g_return_if_fail (style->refcount > 0);
|
|
|
|
gtk_text_attributes_unref (style);
|
|
}
|
|
|
|
/*
|
|
* Lines
|
|
*/
|
|
|
|
/* This function tries to optimize the case where a line
|
|
is completely invisible */
|
|
static gboolean
|
|
totally_invisible_line (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
GtkTextIter *iter)
|
|
{
|
|
GtkTextLineSegment *seg;
|
|
int bytes = 0;
|
|
|
|
/* Check if the first char is visible, if so we are partially visible.
|
|
* Note that we have to check this since we don't know the current
|
|
* invisible/noninvisible toggle state; this function can use the whole btree
|
|
* to get it right.
|
|
*/
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
iter, line, 0);
|
|
|
|
if (!_gtk_text_btree_char_is_invisible (iter))
|
|
return FALSE;
|
|
|
|
bytes = 0;
|
|
seg = line->segments;
|
|
|
|
while (seg != NULL)
|
|
{
|
|
if (seg->byte_count > 0)
|
|
bytes += seg->byte_count;
|
|
|
|
/* Note that these two tests can cause us to bail out
|
|
* when we shouldn't, because a higher-priority tag
|
|
* may override these settings. However the important
|
|
* thing is to only invisible really-invisible lines, rather
|
|
* than to invisible all really-invisible lines.
|
|
*/
|
|
|
|
else if (seg->type == >k_text_toggle_on_type)
|
|
{
|
|
invalidate_cached_style (layout);
|
|
|
|
/* Bail out if an elision-unsetting tag begins */
|
|
if (seg->body.toggle.info->tag->invisible_set &&
|
|
!seg->body.toggle.info->tag->values->invisible)
|
|
break;
|
|
}
|
|
else if (seg->type == >k_text_toggle_off_type)
|
|
{
|
|
invalidate_cached_style (layout);
|
|
|
|
/* Bail out if an elision-setting tag ends */
|
|
if (seg->body.toggle.info->tag->invisible_set &&
|
|
seg->body.toggle.info->tag->values->invisible)
|
|
break;
|
|
}
|
|
|
|
seg = seg->next;
|
|
}
|
|
|
|
if (seg != NULL) /* didn't reach line end */
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
set_para_values (GtkTextLayout *layout,
|
|
PangoDirection base_dir,
|
|
GtkTextAttributes *style,
|
|
GtkTextLineDisplay *display)
|
|
{
|
|
PangoAlignment pango_align = PANGO_ALIGN_LEFT;
|
|
PangoWrapMode pango_wrap = PANGO_WRAP_WORD;
|
|
|
|
switch (base_dir)
|
|
{
|
|
/* If no base direction was found, then use the style direction */
|
|
case PANGO_DIRECTION_NEUTRAL :
|
|
display->direction = style->direction;
|
|
|
|
/* Override the base direction */
|
|
if (display->direction == GTK_TEXT_DIR_RTL)
|
|
base_dir = PANGO_DIRECTION_RTL;
|
|
else
|
|
base_dir = PANGO_DIRECTION_LTR;
|
|
|
|
break;
|
|
case PANGO_DIRECTION_RTL :
|
|
display->direction = GTK_TEXT_DIR_RTL;
|
|
break;
|
|
default:
|
|
display->direction = GTK_TEXT_DIR_LTR;
|
|
break;
|
|
}
|
|
|
|
if (display->direction == GTK_TEXT_DIR_RTL)
|
|
display->layout = pango_layout_new (layout->rtl_context);
|
|
else
|
|
display->layout = pango_layout_new (layout->ltr_context);
|
|
|
|
switch (style->justification)
|
|
{
|
|
case GTK_JUSTIFY_LEFT:
|
|
pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
|
|
break;
|
|
case GTK_JUSTIFY_RIGHT:
|
|
pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT;
|
|
break;
|
|
case GTK_JUSTIFY_CENTER:
|
|
pango_align = PANGO_ALIGN_CENTER;
|
|
break;
|
|
case GTK_JUSTIFY_FILL:
|
|
pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
|
|
pango_layout_set_justify (display->layout, TRUE);
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
|
|
pango_layout_set_alignment (display->layout, pango_align);
|
|
pango_layout_set_spacing (display->layout,
|
|
style->pixels_inside_wrap * PANGO_SCALE);
|
|
|
|
if (style->tabs)
|
|
pango_layout_set_tabs (display->layout, style->tabs);
|
|
|
|
display->top_margin = style->pixels_above_lines;
|
|
display->height = style->pixels_above_lines + style->pixels_below_lines;
|
|
display->bottom_margin = style->pixels_below_lines;
|
|
display->left_margin = style->left_margin;
|
|
display->right_margin = style->right_margin;
|
|
|
|
display->x_offset = display->left_margin;
|
|
|
|
pango_layout_set_indent (display->layout,
|
|
style->indent * PANGO_SCALE);
|
|
|
|
switch (style->wrap_mode)
|
|
{
|
|
case GTK_WRAP_CHAR:
|
|
pango_wrap = PANGO_WRAP_CHAR;
|
|
break;
|
|
case GTK_WRAP_WORD:
|
|
pango_wrap = PANGO_WRAP_WORD;
|
|
break;
|
|
|
|
case GTK_WRAP_WORD_CHAR:
|
|
pango_wrap = PANGO_WRAP_WORD_CHAR;
|
|
break;
|
|
|
|
case GTK_WRAP_NONE:
|
|
break;
|
|
}
|
|
|
|
if (style->wrap_mode != GTK_WRAP_NONE)
|
|
{
|
|
int layout_width = (layout->screen_width - display->left_margin - display->right_margin);
|
|
pango_layout_set_width (display->layout, layout_width * PANGO_SCALE);
|
|
pango_layout_set_wrap (display->layout, pango_wrap);
|
|
}
|
|
|
|
display->total_width = MAX (layout->screen_width, layout->width) - display->left_margin - display->right_margin;
|
|
|
|
if (style->pg_bg_color)
|
|
display->pg_bg_color = gdk_color_copy (style->pg_bg_color);
|
|
else
|
|
display->pg_bg_color = NULL;
|
|
}
|
|
|
|
static PangoAttribute *
|
|
gtk_text_attr_appearance_copy (const PangoAttribute *attr)
|
|
{
|
|
const GtkTextAttrAppearance *appearance_attr = (const GtkTextAttrAppearance *)attr;
|
|
|
|
return gtk_text_attr_appearance_new (&appearance_attr->appearance);
|
|
}
|
|
|
|
static void
|
|
gtk_text_attr_appearance_destroy (PangoAttribute *attr)
|
|
{
|
|
GtkTextAttrAppearance *appearance_attr = (GtkTextAttrAppearance *)attr;
|
|
|
|
if (appearance_attr->appearance.bg_stipple)
|
|
g_object_unref (appearance_attr->appearance.bg_stipple);
|
|
if (appearance_attr->appearance.fg_stipple)
|
|
g_object_unref (appearance_attr->appearance.fg_stipple);
|
|
|
|
g_slice_free (GtkTextAttrAppearance, appearance_attr);
|
|
}
|
|
|
|
static gboolean
|
|
gtk_text_attr_appearance_compare (const PangoAttribute *attr1,
|
|
const PangoAttribute *attr2)
|
|
{
|
|
const GtkTextAppearance *appearance1 = &((const GtkTextAttrAppearance *)attr1)->appearance;
|
|
const GtkTextAppearance *appearance2 = &((const GtkTextAttrAppearance *)attr2)->appearance;
|
|
|
|
return (gdk_color_equal (&appearance1->fg_color, &appearance2->fg_color) &&
|
|
gdk_color_equal (&appearance1->bg_color, &appearance2->bg_color) &&
|
|
appearance1->fg_stipple == appearance2->fg_stipple &&
|
|
appearance1->bg_stipple == appearance2->bg_stipple &&
|
|
appearance1->underline == appearance2->underline &&
|
|
appearance1->strikethrough == appearance2->strikethrough &&
|
|
appearance1->draw_bg == appearance2->draw_bg);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_attr_appearance_new:
|
|
* @desc:
|
|
*
|
|
* Create a new font description attribute. (This attribute
|
|
* allows setting family, style, weight, variant, stretch,
|
|
* and size simultaneously.)
|
|
*
|
|
* Return value:
|
|
**/
|
|
static PangoAttribute *
|
|
gtk_text_attr_appearance_new (const GtkTextAppearance *appearance)
|
|
{
|
|
static PangoAttrClass klass = {
|
|
0,
|
|
gtk_text_attr_appearance_copy,
|
|
gtk_text_attr_appearance_destroy,
|
|
gtk_text_attr_appearance_compare
|
|
};
|
|
|
|
GtkTextAttrAppearance *result;
|
|
|
|
if (!klass.type)
|
|
klass.type = gtk_text_attr_appearance_type =
|
|
pango_attr_type_register ("GtkTextAttrAppearance");
|
|
|
|
result = g_slice_new (GtkTextAttrAppearance);
|
|
result->attr.klass = &klass;
|
|
|
|
result->appearance = *appearance;
|
|
|
|
if (appearance->bg_stipple)
|
|
g_object_ref (appearance->bg_stipple);
|
|
if (appearance->fg_stipple)
|
|
g_object_ref (appearance->fg_stipple);
|
|
|
|
return (PangoAttribute *)result;
|
|
}
|
|
|
|
static void
|
|
add_generic_attrs (GtkTextLayout *layout,
|
|
GtkTextAppearance *appearance,
|
|
gint byte_count,
|
|
PangoAttrList *attrs,
|
|
gint start,
|
|
gboolean size_only,
|
|
gboolean is_text)
|
|
{
|
|
PangoAttribute *attr;
|
|
|
|
if (appearance->underline != PANGO_UNDERLINE_NONE)
|
|
{
|
|
attr = pango_attr_underline_new (appearance->underline);
|
|
|
|
attr->start_index = start;
|
|
attr->end_index = start + byte_count;
|
|
|
|
pango_attr_list_insert (attrs, attr);
|
|
}
|
|
|
|
if (appearance->strikethrough)
|
|
{
|
|
attr = pango_attr_strikethrough_new (appearance->strikethrough);
|
|
|
|
attr->start_index = start;
|
|
attr->end_index = start + byte_count;
|
|
|
|
pango_attr_list_insert (attrs, attr);
|
|
}
|
|
|
|
if (appearance->rise != 0)
|
|
{
|
|
attr = pango_attr_rise_new (appearance->rise);
|
|
|
|
attr->start_index = start;
|
|
attr->end_index = start + byte_count;
|
|
|
|
pango_attr_list_insert (attrs, attr);
|
|
}
|
|
|
|
if (!size_only)
|
|
{
|
|
attr = gtk_text_attr_appearance_new (appearance);
|
|
|
|
attr->start_index = start;
|
|
attr->end_index = start + byte_count;
|
|
|
|
((GtkTextAttrAppearance *)attr)->appearance.is_text = is_text;
|
|
|
|
pango_attr_list_insert (attrs, attr);
|
|
}
|
|
}
|
|
|
|
static void
|
|
add_text_attrs (GtkTextLayout *layout,
|
|
GtkTextAttributes *style,
|
|
gint byte_count,
|
|
PangoAttrList *attrs,
|
|
gint start,
|
|
gboolean size_only)
|
|
{
|
|
PangoAttribute *attr;
|
|
|
|
attr = pango_attr_font_desc_new (style->font);
|
|
attr->start_index = start;
|
|
attr->end_index = start + byte_count;
|
|
|
|
pango_attr_list_insert (attrs, attr);
|
|
|
|
if (style->font_scale != 1.0)
|
|
{
|
|
attr = pango_attr_scale_new (style->font_scale);
|
|
|
|
attr->start_index = start;
|
|
attr->end_index = start + byte_count;
|
|
|
|
pango_attr_list_insert (attrs, attr);
|
|
}
|
|
}
|
|
|
|
static void
|
|
add_pixbuf_attrs (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display,
|
|
GtkTextAttributes *style,
|
|
GtkTextLineSegment *seg,
|
|
PangoAttrList *attrs,
|
|
gint start)
|
|
{
|
|
PangoAttribute *attr;
|
|
PangoRectangle logical_rect;
|
|
GtkTextPixbuf *pixbuf = &seg->body.pixbuf;
|
|
gint width, height;
|
|
|
|
width = gdk_pixbuf_get_width (pixbuf->pixbuf);
|
|
height = gdk_pixbuf_get_height (pixbuf->pixbuf);
|
|
|
|
logical_rect.x = 0;
|
|
logical_rect.y = -height * PANGO_SCALE;
|
|
logical_rect.width = width * PANGO_SCALE;
|
|
logical_rect.height = height * PANGO_SCALE;
|
|
|
|
attr = pango_attr_shape_new_with_data (&logical_rect, &logical_rect,
|
|
pixbuf->pixbuf, NULL, NULL);
|
|
attr->start_index = start;
|
|
attr->end_index = start + seg->byte_count;
|
|
pango_attr_list_insert (attrs, attr);
|
|
|
|
display->shaped_objects =
|
|
g_slist_append (display->shaped_objects, pixbuf->pixbuf);
|
|
}
|
|
|
|
static void
|
|
add_child_attrs (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display,
|
|
GtkTextAttributes *style,
|
|
GtkTextLineSegment *seg,
|
|
PangoAttrList *attrs,
|
|
gint start)
|
|
{
|
|
PangoAttribute *attr;
|
|
PangoRectangle logical_rect;
|
|
gint width, height;
|
|
GSList *tmp_list;
|
|
GtkWidget *widget;
|
|
|
|
width = 1;
|
|
height = 1;
|
|
|
|
tmp_list = seg->body.child.widgets;
|
|
while (tmp_list != NULL)
|
|
{
|
|
GtkWidget *child = tmp_list->data;
|
|
|
|
if (_gtk_anchored_child_get_layout (child) == layout)
|
|
{
|
|
/* Found it */
|
|
GtkRequisition req;
|
|
|
|
gtk_widget_get_child_requisition (child, &req);
|
|
|
|
width = req.width;
|
|
height = req.height;
|
|
|
|
widget = child;
|
|
|
|
break;
|
|
}
|
|
|
|
tmp_list = g_slist_next (tmp_list);
|
|
}
|
|
|
|
if (tmp_list == NULL)
|
|
{
|
|
/* If tmp_list == NULL then there is no widget at this anchor in
|
|
* this display; not an error. We make up an arbitrary size
|
|
* to use, just so the programmer can see the blank spot.
|
|
* We also put a NULL in the shaped objects list, to keep
|
|
* the correspondence between the list and the shaped chars in
|
|
* the layout. A bad hack, yes.
|
|
*/
|
|
|
|
width = 30;
|
|
height = 20;
|
|
|
|
widget = NULL;
|
|
}
|
|
|
|
display->shaped_objects = g_slist_append (display->shaped_objects, widget);
|
|
|
|
logical_rect.x = 0;
|
|
logical_rect.y = -height * PANGO_SCALE;
|
|
logical_rect.width = width * PANGO_SCALE;
|
|
logical_rect.height = height * PANGO_SCALE;
|
|
|
|
attr = pango_attr_shape_new_with_data (&logical_rect, &logical_rect,
|
|
widget, NULL, NULL);
|
|
attr->start_index = start;
|
|
attr->end_index = start + seg->byte_count;
|
|
pango_attr_list_insert (attrs, attr);
|
|
}
|
|
|
|
/**
|
|
* get_block_cursor:
|
|
* @layout: a #GtkTextLayout
|
|
* @display: a #GtkTextLineDisplay
|
|
* @insert_iter: iter pointing to the cursor location
|
|
* @insert_index: cursor offset in the @display's layout, it may
|
|
* be different from @insert_iter's offset in case when preedit
|
|
* string is present.
|
|
* @pos: location to store cursor position
|
|
* @cursor_at_line_end: whether cursor is at the end of line
|
|
*
|
|
* Checks whether layout should display block cursor at given position.
|
|
* For this layout must be in overwrite mode and text at @insert_iter
|
|
* must be editable.
|
|
**/
|
|
static gboolean
|
|
get_block_cursor (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display,
|
|
const GtkTextIter *insert_iter,
|
|
gint insert_index,
|
|
GdkRectangle *pos,
|
|
gboolean *cursor_at_line_end)
|
|
{
|
|
PangoRectangle pango_pos;
|
|
|
|
if (layout->overwrite_mode &&
|
|
gtk_text_iter_editable (insert_iter, TRUE) &&
|
|
_gtk_text_util_get_block_cursor_location (display->layout,
|
|
insert_index,
|
|
&pango_pos,
|
|
cursor_at_line_end))
|
|
{
|
|
if (pos)
|
|
{
|
|
pos->x = PANGO_PIXELS (pango_pos.x);
|
|
pos->y = PANGO_PIXELS (pango_pos.y);
|
|
pos->width = PANGO_PIXELS (pango_pos.width);
|
|
pos->height = PANGO_PIXELS (pango_pos.height);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
else
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
add_cursor (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display,
|
|
GtkTextLineSegment *seg,
|
|
gint start)
|
|
{
|
|
PangoRectangle strong_pos, weak_pos;
|
|
GtkTextCursorDisplay *cursor = NULL; /* Quiet GCC */
|
|
gboolean add_weak = FALSE;
|
|
gboolean add_strong = FALSE;
|
|
|
|
/* Hide insertion cursor when we have a selection or the layout
|
|
* user has hidden the cursor.
|
|
*/
|
|
if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
|
|
seg->body.mark.obj) &&
|
|
(!layout->cursor_visible ||
|
|
gtk_text_buffer_get_selection_bounds (layout->buffer, NULL, NULL)))
|
|
return;
|
|
|
|
if (layout->overwrite_mode &&
|
|
_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
|
|
seg->body.mark.obj))
|
|
{
|
|
GtkTextIter iter;
|
|
gboolean cursor_at_line_end;
|
|
|
|
_gtk_text_btree_get_iter_at_mark (_gtk_text_buffer_get_btree (layout->buffer),
|
|
&iter, seg->body.mark.obj);
|
|
|
|
if (get_block_cursor (layout, display, &iter, start,
|
|
&display->block_cursor,
|
|
&cursor_at_line_end))
|
|
{
|
|
display->has_block_cursor = TRUE;
|
|
display->cursor_at_line_end = cursor_at_line_end;
|
|
return;
|
|
}
|
|
}
|
|
|
|
pango_layout_get_cursor_pos (display->layout, start, &strong_pos, &weak_pos);
|
|
|
|
if (layout->cursor_direction == GTK_TEXT_DIR_NONE)
|
|
{
|
|
add_strong = TRUE;
|
|
add_weak = TRUE;
|
|
}
|
|
else if (display->direction == layout->cursor_direction)
|
|
add_strong = TRUE;
|
|
else
|
|
add_weak = TRUE;
|
|
|
|
if (add_strong)
|
|
{
|
|
cursor = g_new (GtkTextCursorDisplay, 1);
|
|
|
|
cursor->x = PANGO_PIXELS (strong_pos.x);
|
|
cursor->y = PANGO_PIXELS (strong_pos.y);
|
|
cursor->height = PANGO_PIXELS (strong_pos.height);
|
|
cursor->is_strong = TRUE;
|
|
cursor->is_weak = (layout->cursor_direction == GTK_TEXT_DIR_NONE) ? FALSE : TRUE;
|
|
display->cursors = g_slist_prepend (display->cursors, cursor);
|
|
}
|
|
|
|
if (add_weak)
|
|
{
|
|
if (weak_pos.x == strong_pos.x && add_strong)
|
|
cursor->is_weak = TRUE;
|
|
else
|
|
{
|
|
cursor = g_new (GtkTextCursorDisplay, 1);
|
|
|
|
cursor->x = PANGO_PIXELS (weak_pos.x);
|
|
cursor->y = PANGO_PIXELS (weak_pos.y);
|
|
cursor->height = PANGO_PIXELS (weak_pos.height);
|
|
cursor->is_strong = (layout->cursor_direction == GTK_TEXT_DIR_NONE) ? FALSE : TRUE;
|
|
cursor->is_weak = TRUE;
|
|
display->cursors = g_slist_prepend (display->cursors, cursor);
|
|
}
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
is_shape (PangoLayoutRun *run)
|
|
{
|
|
GSList *tmp_list = run->item->analysis.extra_attrs;
|
|
|
|
while (tmp_list)
|
|
{
|
|
PangoAttribute *attr = tmp_list->data;
|
|
|
|
if (attr->klass->type == PANGO_ATTR_SHAPE)
|
|
return TRUE;
|
|
|
|
tmp_list = tmp_list->next;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
allocate_child_widgets (GtkTextLayout *text_layout,
|
|
GtkTextLineDisplay *display)
|
|
{
|
|
GSList *shaped = display->shaped_objects;
|
|
PangoLayout *layout = display->layout;
|
|
PangoLayoutIter *iter;
|
|
|
|
iter = pango_layout_get_iter (layout);
|
|
|
|
do
|
|
{
|
|
PangoLayoutRun *run = pango_layout_iter_get_run_readonly (iter);
|
|
|
|
if (run && is_shape (run))
|
|
{
|
|
GObject *shaped_object = shaped->data;
|
|
shaped = shaped->next;
|
|
|
|
/* shaped_object is NULL for child anchors with no
|
|
* widgets stored at them
|
|
*/
|
|
if (GTK_IS_WIDGET (shaped_object))
|
|
{
|
|
PangoRectangle extents;
|
|
|
|
/* We emit "allocate_child" with the x,y of
|
|
* the widget with respect to the top of the line
|
|
* and the left side of the buffer
|
|
*/
|
|
|
|
pango_layout_iter_get_run_extents (iter,
|
|
NULL,
|
|
&extents);
|
|
|
|
g_signal_emit (text_layout,
|
|
signals[ALLOCATE_CHILD],
|
|
0,
|
|
shaped_object,
|
|
PANGO_PIXELS (extents.x) + display->x_offset,
|
|
PANGO_PIXELS (extents.y) + display->top_margin);
|
|
}
|
|
}
|
|
}
|
|
while (pango_layout_iter_next_run (iter));
|
|
|
|
pango_layout_iter_free (iter);
|
|
}
|
|
|
|
static void
|
|
convert_color (GdkColor *result,
|
|
PangoAttrColor *attr)
|
|
{
|
|
result->red = attr->color.red;
|
|
result->blue = attr->color.blue;
|
|
result->green = attr->color.green;
|
|
}
|
|
|
|
/* This function is used to convert the preedit string attributes, which are
|
|
* standard PangoAttributes, into the custom attributes used by the text
|
|
* widget and insert them into a attr list with a given offset.
|
|
*/
|
|
static void
|
|
add_preedit_attrs (GtkTextLayout *layout,
|
|
GtkTextAttributes *style,
|
|
PangoAttrList *attrs,
|
|
gint offset,
|
|
gboolean size_only)
|
|
{
|
|
PangoAttrIterator *iter = pango_attr_list_get_iterator (layout->preedit_attrs);
|
|
|
|
do
|
|
{
|
|
GtkTextAppearance appearance = style->appearance;
|
|
PangoFontDescription *font_desc = pango_font_description_copy_static (style->font);
|
|
PangoAttribute *insert_attr;
|
|
GSList *extra_attrs = NULL;
|
|
GSList *tmp_list;
|
|
PangoLanguage *language;
|
|
gint start, end;
|
|
|
|
pango_attr_iterator_range (iter, &start, &end);
|
|
|
|
if (end == G_MAXINT)
|
|
end = layout->preedit_len;
|
|
|
|
if (end == start)
|
|
continue;
|
|
|
|
pango_attr_iterator_get_font (iter, font_desc, &language, &extra_attrs);
|
|
|
|
tmp_list = extra_attrs;
|
|
while (tmp_list)
|
|
{
|
|
PangoAttribute *attr = tmp_list->data;
|
|
|
|
switch (attr->klass->type)
|
|
{
|
|
case PANGO_ATTR_FOREGROUND:
|
|
convert_color (&appearance.fg_color, (PangoAttrColor *)attr);
|
|
break;
|
|
case PANGO_ATTR_BACKGROUND:
|
|
convert_color (&appearance.bg_color, (PangoAttrColor *)attr);
|
|
appearance.draw_bg = TRUE;
|
|
break;
|
|
case PANGO_ATTR_UNDERLINE:
|
|
appearance.underline = ((PangoAttrInt *)attr)->value;
|
|
break;
|
|
case PANGO_ATTR_STRIKETHROUGH:
|
|
appearance.strikethrough = ((PangoAttrInt *)attr)->value;
|
|
break;
|
|
case PANGO_ATTR_RISE:
|
|
appearance.rise = ((PangoAttrInt *)attr)->value;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
pango_attribute_destroy (attr);
|
|
tmp_list = tmp_list->next;
|
|
}
|
|
|
|
g_slist_free (extra_attrs);
|
|
|
|
insert_attr = pango_attr_font_desc_new (font_desc);
|
|
insert_attr->start_index = start + offset;
|
|
insert_attr->end_index = end + offset;
|
|
|
|
pango_attr_list_insert (attrs, insert_attr);
|
|
|
|
if (language)
|
|
{
|
|
insert_attr = pango_attr_language_new (language);
|
|
insert_attr->start_index = start + offset;
|
|
insert_attr->end_index = end + offset;
|
|
|
|
pango_attr_list_insert (attrs, insert_attr);
|
|
}
|
|
|
|
add_generic_attrs (layout, &appearance, end - start,
|
|
attrs, start + offset,
|
|
size_only, TRUE);
|
|
|
|
pango_font_description_free (font_desc);
|
|
}
|
|
while (pango_attr_iterator_next (iter));
|
|
|
|
pango_attr_iterator_destroy (iter);
|
|
}
|
|
|
|
/* Iterate over the line and fill in display->cursors.
|
|
* It's a stripped copy of gtk_text_layout_get_line_display() */
|
|
static void
|
|
update_text_display_cursors (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
GtkTextLineDisplay *display)
|
|
{
|
|
GtkTextLineSegment *seg;
|
|
GtkTextIter iter;
|
|
gint layout_byte_offset, buffer_byte_offset;
|
|
GSList *cursor_byte_offsets = NULL;
|
|
GSList *cursor_segs = NULL;
|
|
GSList *tmp_list1, *tmp_list2;
|
|
|
|
if (!display->cursors_invalid)
|
|
return;
|
|
|
|
display->cursors_invalid = FALSE;
|
|
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
&iter, line, 0);
|
|
|
|
/* Special-case optimization for completely
|
|
* invisible lines; makes it faster to deal
|
|
* with sequences of invisible lines.
|
|
*/
|
|
if (totally_invisible_line (layout, line, &iter))
|
|
return;
|
|
|
|
/* Iterate over segments */
|
|
layout_byte_offset = 0; /* position in the layout text (includes preedit, does not include invisible text) */
|
|
buffer_byte_offset = 0; /* position in the buffer line */
|
|
seg = _gtk_text_iter_get_any_segment (&iter);
|
|
while (seg != NULL)
|
|
{
|
|
/* Displayable segments */
|
|
if (seg->type == >k_text_char_type ||
|
|
seg->type == >k_text_pixbuf_type ||
|
|
seg->type == >k_text_child_type)
|
|
{
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
&iter, line,
|
|
buffer_byte_offset);
|
|
|
|
if (!_gtk_text_btree_char_is_invisible (&iter))
|
|
layout_byte_offset += seg->byte_count;
|
|
|
|
buffer_byte_offset += seg->byte_count;
|
|
}
|
|
|
|
/* Marks */
|
|
else if (seg->type == >k_text_right_mark_type ||
|
|
seg->type == >k_text_left_mark_type)
|
|
{
|
|
gint cursor_offset = 0;
|
|
|
|
/* At the insertion point, add the preedit string, if any */
|
|
|
|
if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
|
|
seg->body.mark.obj))
|
|
{
|
|
display->insert_index = layout_byte_offset;
|
|
|
|
if (layout->preedit_len > 0)
|
|
{
|
|
layout_byte_offset += layout->preedit_len;
|
|
/* DO NOT increment the buffer byte offset for preedit */
|
|
cursor_offset = layout->preedit_cursor - layout->preedit_len;
|
|
}
|
|
}
|
|
|
|
/* Display visible marks */
|
|
|
|
if (seg->body.mark.visible)
|
|
{
|
|
cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
|
|
GINT_TO_POINTER (layout_byte_offset + cursor_offset));
|
|
cursor_segs = g_slist_prepend (cursor_segs, seg);
|
|
}
|
|
}
|
|
|
|
/* Toggles */
|
|
else if (seg->type == >k_text_toggle_on_type ||
|
|
seg->type == >k_text_toggle_off_type)
|
|
{
|
|
}
|
|
|
|
else
|
|
g_error ("Unknown segment type: %s", seg->type->name);
|
|
|
|
seg = seg->next;
|
|
}
|
|
|
|
tmp_list1 = cursor_byte_offsets;
|
|
tmp_list2 = cursor_segs;
|
|
while (tmp_list1)
|
|
{
|
|
add_cursor (layout, display, tmp_list2->data,
|
|
GPOINTER_TO_INT (tmp_list1->data));
|
|
tmp_list1 = tmp_list1->next;
|
|
tmp_list2 = tmp_list2->next;
|
|
}
|
|
g_slist_free (cursor_byte_offsets);
|
|
g_slist_free (cursor_segs);
|
|
}
|
|
|
|
/* Same as _gtk_text_btree_get_tags(), except it returns GPtrArray,
|
|
* to be used in gtk_text_layout_get_line_display(). */
|
|
static GPtrArray *
|
|
get_tags_array_at_iter (GtkTextIter *iter)
|
|
{
|
|
GtkTextTag **tags;
|
|
GPtrArray *array = NULL;
|
|
gint n_tags;
|
|
|
|
tags = _gtk_text_btree_get_tags (iter, &n_tags);
|
|
|
|
if (n_tags > 0)
|
|
{
|
|
array = g_ptr_array_sized_new (n_tags);
|
|
g_ptr_array_set_size (array, n_tags);
|
|
memcpy (array->pdata, tags, n_tags * sizeof (GtkTextTag*));
|
|
}
|
|
|
|
g_free (tags);
|
|
return array;
|
|
}
|
|
|
|
/* Add the tag to the array if it's not there already, and remove
|
|
* it otherwise. It keeps the array sorted by tags priority. */
|
|
static GPtrArray *
|
|
tags_array_toggle_tag (GPtrArray *array,
|
|
GtkTextTag *tag)
|
|
{
|
|
gint pos;
|
|
GtkTextTag **tags;
|
|
|
|
if (array == NULL)
|
|
array = g_ptr_array_new ();
|
|
|
|
tags = (GtkTextTag**) array->pdata;
|
|
|
|
for (pos = 0; pos < array->len && tags[pos]->priority < tag->priority; pos++) ;
|
|
|
|
if (pos < array->len && tags[pos] == tag)
|
|
g_ptr_array_remove_index (array, pos);
|
|
else
|
|
{
|
|
g_ptr_array_set_size (array, array->len + 1);
|
|
if (pos < array->len - 1)
|
|
memmove (array->pdata + pos + 1, array->pdata + pos,
|
|
(array->len - pos - 1) * sizeof (GtkTextTag*));
|
|
array->pdata[pos] = tag;
|
|
}
|
|
|
|
return array;
|
|
}
|
|
|
|
GtkTextLineDisplay *
|
|
gtk_text_layout_get_line_display (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
gboolean size_only)
|
|
{
|
|
GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout);
|
|
GtkTextLineDisplay *display;
|
|
GtkTextLineSegment *seg;
|
|
GtkTextIter iter;
|
|
GtkTextAttributes *style;
|
|
gchar *text;
|
|
PangoAttrList *attrs;
|
|
gint text_allocated, layout_byte_offset, buffer_byte_offset;
|
|
PangoRectangle extents;
|
|
gboolean para_values_set = FALSE;
|
|
GSList *cursor_byte_offsets = NULL;
|
|
GSList *cursor_segs = NULL;
|
|
GSList *tmp_list1, *tmp_list2;
|
|
gboolean saw_widget = FALSE;
|
|
PangoDirection base_dir;
|
|
GPtrArray *tags;
|
|
gboolean initial_toggle_segments;
|
|
|
|
g_return_val_if_fail (line != NULL, NULL);
|
|
|
|
if (layout->one_display_cache)
|
|
{
|
|
if (line == layout->one_display_cache->line &&
|
|
(size_only || !layout->one_display_cache->size_only))
|
|
{
|
|
if (!size_only)
|
|
update_text_display_cursors (layout, line, layout->one_display_cache);
|
|
return layout->one_display_cache;
|
|
}
|
|
else
|
|
{
|
|
GtkTextLineDisplay *tmp_display = layout->one_display_cache;
|
|
layout->one_display_cache = NULL;
|
|
gtk_text_layout_free_line_display (layout, tmp_display);
|
|
}
|
|
}
|
|
|
|
DV (g_print ("creating one line display cache (%s)\n", G_STRLOC));
|
|
|
|
display = g_new0 (GtkTextLineDisplay, 1);
|
|
|
|
display->size_only = size_only;
|
|
display->line = line;
|
|
display->insert_index = -1;
|
|
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
&iter, line, 0);
|
|
|
|
/* Special-case optimization for completely
|
|
* invisible lines; makes it faster to deal
|
|
* with sequences of invisible lines.
|
|
*/
|
|
if (totally_invisible_line (layout, line, &iter))
|
|
{
|
|
if (display->direction == GTK_TEXT_DIR_RTL)
|
|
display->layout = pango_layout_new (layout->rtl_context);
|
|
else
|
|
display->layout = pango_layout_new (layout->ltr_context);
|
|
|
|
return display;
|
|
}
|
|
|
|
/* Find the bidi base direction */
|
|
base_dir = line->dir_propagated_forward;
|
|
if (base_dir == PANGO_DIRECTION_NEUTRAL)
|
|
base_dir = line->dir_propagated_back;
|
|
|
|
if (line == priv->cursor_line &&
|
|
line->dir_strong == PANGO_DIRECTION_NEUTRAL)
|
|
{
|
|
base_dir = (layout->keyboard_direction == GTK_TEXT_DIR_LTR) ?
|
|
PANGO_DIRECTION_LTR : PANGO_DIRECTION_RTL;
|
|
}
|
|
|
|
/* Allocate space for flat text for buffer
|
|
*/
|
|
text_allocated = _gtk_text_line_byte_count (line);
|
|
text = g_malloc (text_allocated);
|
|
|
|
attrs = pango_attr_list_new ();
|
|
|
|
/* Iterate over segments, creating display chunks for them, and updating the tags array. */
|
|
layout_byte_offset = 0; /* current length of layout text (includes preedit, does not include invisible text) */
|
|
buffer_byte_offset = 0; /* position in the buffer line */
|
|
seg = _gtk_text_iter_get_any_segment (&iter);
|
|
tags = get_tags_array_at_iter (&iter);
|
|
initial_toggle_segments = TRUE;
|
|
while (seg != NULL)
|
|
{
|
|
/* Displayable segments */
|
|
if (seg->type == >k_text_char_type ||
|
|
seg->type == >k_text_pixbuf_type ||
|
|
seg->type == >k_text_child_type)
|
|
{
|
|
style = get_style (layout, tags);
|
|
initial_toggle_segments = FALSE;
|
|
|
|
/* We have to delay setting the paragraph values until we
|
|
* hit the first pixbuf or text segment because toggles at
|
|
* the beginning of the paragraph should affect the
|
|
* paragraph-global values
|
|
*/
|
|
if (!para_values_set)
|
|
{
|
|
set_para_values (layout, base_dir, style, display);
|
|
para_values_set = TRUE;
|
|
}
|
|
|
|
/* First see if the chunk is invisible, and ignore it if so. Tk
|
|
* looked at tabs, wrap mode, etc. before doing this, but
|
|
* that made no sense to me, so I am just skipping the
|
|
* invisible chunks
|
|
*/
|
|
if (!style->invisible)
|
|
{
|
|
if (seg->type == >k_text_char_type)
|
|
{
|
|
/* We don't want to split segments because of marks,
|
|
* so we scan forward for more segments only
|
|
* separated from us by marks. In theory, we should
|
|
* also merge segments with identical styles, even
|
|
* if there are toggles in-between
|
|
*/
|
|
|
|
gint bytes = 0;
|
|
GtkTextLineSegment *prev_seg = NULL;
|
|
|
|
while (seg)
|
|
{
|
|
if (seg->type == >k_text_char_type)
|
|
{
|
|
memcpy (text + layout_byte_offset, seg->body.chars, seg->byte_count);
|
|
layout_byte_offset += seg->byte_count;
|
|
buffer_byte_offset += seg->byte_count;
|
|
bytes += seg->byte_count;
|
|
}
|
|
else if (seg->type == >k_text_right_mark_type ||
|
|
seg->type == >k_text_left_mark_type)
|
|
{
|
|
/* If we have preedit string, break out of this loop - we'll almost
|
|
* certainly have different attributes on the preedit string
|
|
*/
|
|
|
|
if (layout->preedit_len > 0 &&
|
|
_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
|
|
seg->body.mark.obj))
|
|
break;
|
|
|
|
if (seg->body.mark.visible)
|
|
{
|
|
cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets, GINT_TO_POINTER (layout_byte_offset));
|
|
cursor_segs = g_slist_prepend (cursor_segs, seg);
|
|
if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
|
|
seg->body.mark.obj))
|
|
display->insert_index = layout_byte_offset;
|
|
}
|
|
}
|
|
else
|
|
break;
|
|
|
|
prev_seg = seg;
|
|
seg = seg->next;
|
|
}
|
|
|
|
seg = prev_seg; /* Back up one */
|
|
add_generic_attrs (layout, &style->appearance,
|
|
bytes,
|
|
attrs, layout_byte_offset - bytes,
|
|
size_only, TRUE);
|
|
add_text_attrs (layout, style, bytes, attrs,
|
|
layout_byte_offset - bytes, size_only);
|
|
}
|
|
else if (seg->type == >k_text_pixbuf_type)
|
|
{
|
|
add_generic_attrs (layout,
|
|
&style->appearance,
|
|
seg->byte_count,
|
|
attrs, layout_byte_offset,
|
|
size_only, FALSE);
|
|
add_pixbuf_attrs (layout, display, style,
|
|
seg, attrs, layout_byte_offset);
|
|
memcpy (text + layout_byte_offset, gtk_text_unknown_char_utf8,
|
|
seg->byte_count);
|
|
layout_byte_offset += seg->byte_count;
|
|
buffer_byte_offset += seg->byte_count;
|
|
}
|
|
else if (seg->type == >k_text_child_type)
|
|
{
|
|
saw_widget = TRUE;
|
|
|
|
add_generic_attrs (layout, &style->appearance,
|
|
seg->byte_count,
|
|
attrs, layout_byte_offset,
|
|
size_only, FALSE);
|
|
add_child_attrs (layout, display, style,
|
|
seg, attrs, layout_byte_offset);
|
|
memcpy (text + layout_byte_offset, gtk_text_unknown_char_utf8,
|
|
seg->byte_count);
|
|
layout_byte_offset += seg->byte_count;
|
|
buffer_byte_offset += seg->byte_count;
|
|
}
|
|
else
|
|
{
|
|
/* We don't know this segment type */
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
} /* if (segment was visible) */
|
|
else
|
|
{
|
|
/* Invisible segment */
|
|
buffer_byte_offset += seg->byte_count;
|
|
}
|
|
|
|
release_style (layout, style);
|
|
}
|
|
|
|
/* Toggles */
|
|
else if (seg->type == >k_text_toggle_on_type ||
|
|
seg->type == >k_text_toggle_off_type)
|
|
{
|
|
/* Style may have changed, drop our
|
|
current cached style */
|
|
invalidate_cached_style (layout);
|
|
/* Add the tag only after we have seen some non-toggle non-mark segment,
|
|
* otherwise the tag is already accounted for by _gtk_text_btree_get_tags(). */
|
|
if (!initial_toggle_segments)
|
|
tags = tags_array_toggle_tag (tags, seg->body.toggle.info->tag);
|
|
}
|
|
|
|
/* Marks */
|
|
else if (seg->type == >k_text_right_mark_type ||
|
|
seg->type == >k_text_left_mark_type)
|
|
{
|
|
gint cursor_offset = 0;
|
|
|
|
/* At the insertion point, add the preedit string, if any */
|
|
|
|
if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
|
|
seg->body.mark.obj))
|
|
{
|
|
display->insert_index = layout_byte_offset;
|
|
|
|
if (layout->preedit_len > 0)
|
|
{
|
|
text_allocated += layout->preedit_len;
|
|
text = g_realloc (text, text_allocated);
|
|
|
|
style = get_style (layout, tags);
|
|
add_preedit_attrs (layout, style, attrs, layout_byte_offset, size_only);
|
|
release_style (layout, style);
|
|
|
|
memcpy (text + layout_byte_offset, layout->preedit_string, layout->preedit_len);
|
|
layout_byte_offset += layout->preedit_len;
|
|
/* DO NOT increment the buffer byte offset for preedit */
|
|
|
|
cursor_offset = layout->preedit_cursor - layout->preedit_len;
|
|
}
|
|
}
|
|
|
|
|
|
/* Display visible marks */
|
|
|
|
if (seg->body.mark.visible)
|
|
{
|
|
cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
|
|
GINT_TO_POINTER (layout_byte_offset + cursor_offset));
|
|
cursor_segs = g_slist_prepend (cursor_segs, seg);
|
|
}
|
|
}
|
|
|
|
else
|
|
g_error ("Unknown segment type: %s", seg->type->name);
|
|
|
|
seg = seg->next;
|
|
}
|
|
|
|
if (!para_values_set)
|
|
{
|
|
style = get_style (layout, tags);
|
|
set_para_values (layout, base_dir, style, display);
|
|
release_style (layout, style);
|
|
}
|
|
|
|
/* Pango doesn't want the trailing paragraph delimiters */
|
|
|
|
{
|
|
/* Only one character has type G_UNICODE_PARAGRAPH_SEPARATOR in
|
|
* Unicode 3.0; update this if that changes.
|
|
*/
|
|
#define PARAGRAPH_SEPARATOR 0x2029
|
|
gunichar ch = 0;
|
|
|
|
if (layout_byte_offset > 0)
|
|
{
|
|
const char *prev = g_utf8_prev_char (text + layout_byte_offset);
|
|
ch = g_utf8_get_char (prev);
|
|
if (ch == PARAGRAPH_SEPARATOR || ch == '\r' || ch == '\n')
|
|
layout_byte_offset = prev - text; /* chop off */
|
|
|
|
if (ch == '\n' && layout_byte_offset > 0)
|
|
{
|
|
/* Possibly chop a CR as well */
|
|
prev = g_utf8_prev_char (text + layout_byte_offset);
|
|
if (*prev == '\r')
|
|
--layout_byte_offset;
|
|
}
|
|
}
|
|
}
|
|
|
|
pango_layout_set_text (display->layout, text, layout_byte_offset);
|
|
pango_layout_set_attributes (display->layout, attrs);
|
|
|
|
tmp_list1 = cursor_byte_offsets;
|
|
tmp_list2 = cursor_segs;
|
|
while (tmp_list1)
|
|
{
|
|
add_cursor (layout, display, tmp_list2->data,
|
|
GPOINTER_TO_INT (tmp_list1->data));
|
|
tmp_list1 = tmp_list1->next;
|
|
tmp_list2 = tmp_list2->next;
|
|
}
|
|
g_slist_free (cursor_byte_offsets);
|
|
g_slist_free (cursor_segs);
|
|
|
|
pango_layout_get_extents (display->layout, NULL, &extents);
|
|
|
|
display->width = PIXEL_BOUND (extents.width) + display->left_margin + display->right_margin;
|
|
display->height += PANGO_PIXELS (extents.height);
|
|
|
|
/* If we aren't wrapping, we need to do the alignment of each
|
|
* paragraph ourselves.
|
|
*/
|
|
if (pango_layout_get_width (display->layout) < 0)
|
|
{
|
|
gint excess = display->total_width - display->width;
|
|
|
|
switch (pango_layout_get_alignment (display->layout))
|
|
{
|
|
case PANGO_ALIGN_LEFT:
|
|
break;
|
|
case PANGO_ALIGN_CENTER:
|
|
display->x_offset += excess / 2;
|
|
break;
|
|
case PANGO_ALIGN_RIGHT:
|
|
display->x_offset += excess;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Free this if we aren't in a loop */
|
|
if (layout->wrap_loop_count == 0)
|
|
invalidate_cached_style (layout);
|
|
|
|
g_free (text);
|
|
pango_attr_list_unref (attrs);
|
|
if (tags != NULL)
|
|
g_ptr_array_free (tags, TRUE);
|
|
|
|
layout->one_display_cache = display;
|
|
|
|
if (saw_widget)
|
|
allocate_child_widgets (layout, display);
|
|
|
|
return display;
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_free_line_display (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display)
|
|
{
|
|
if (display != layout->one_display_cache)
|
|
{
|
|
if (display->layout)
|
|
g_object_unref (display->layout);
|
|
|
|
if (display->cursors)
|
|
{
|
|
g_slist_foreach (display->cursors, (GFunc)g_free, NULL);
|
|
g_slist_free (display->cursors);
|
|
}
|
|
g_slist_free (display->shaped_objects);
|
|
|
|
if (display->pg_bg_color)
|
|
gdk_color_free (display->pg_bg_color);
|
|
|
|
g_free (display);
|
|
}
|
|
}
|
|
|
|
/* Functions to convert iter <=> index for the line of a GtkTextLineDisplay
|
|
* taking into account the preedit string and invisible text if necessary.
|
|
*/
|
|
static gint
|
|
line_display_iter_to_index (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display,
|
|
const GtkTextIter *iter)
|
|
{
|
|
gint index;
|
|
|
|
g_return_val_if_fail (_gtk_text_iter_get_text_line (iter) == display->line, 0);
|
|
|
|
index = gtk_text_iter_get_visible_line_index (iter);
|
|
|
|
if (layout->preedit_len > 0 && display->insert_index >= 0)
|
|
{
|
|
if (index >= display->insert_index)
|
|
index += layout->preedit_len;
|
|
}
|
|
|
|
return index;
|
|
}
|
|
|
|
static void
|
|
line_display_index_to_iter (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display,
|
|
GtkTextIter *iter,
|
|
gint index,
|
|
gint trailing)
|
|
{
|
|
g_return_if_fail (!_gtk_text_line_is_last (display->line,
|
|
_gtk_text_buffer_get_btree (layout->buffer)));
|
|
|
|
if (layout->preedit_len > 0 && display->insert_index >= 0)
|
|
{
|
|
if (index >= display->insert_index + layout->preedit_len)
|
|
index -= layout->preedit_len;
|
|
else if (index > display->insert_index)
|
|
{
|
|
index = display->insert_index;
|
|
trailing = 0;
|
|
}
|
|
}
|
|
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
iter, display->line, 0);
|
|
|
|
gtk_text_iter_set_visible_line_index (iter, index);
|
|
|
|
if (_gtk_text_iter_get_text_line (iter) != display->line)
|
|
{
|
|
/* Clamp to end of line - really this clamping should have been done
|
|
* before here, maybe in Pango, this is a broken band-aid I think
|
|
*/
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
iter, display->line, 0);
|
|
|
|
if (!gtk_text_iter_ends_line (iter))
|
|
gtk_text_iter_forward_to_line_end (iter);
|
|
}
|
|
|
|
gtk_text_iter_forward_chars (iter, trailing);
|
|
}
|
|
|
|
static void
|
|
get_line_at_y (GtkTextLayout *layout,
|
|
gint y,
|
|
GtkTextLine **line,
|
|
gint *line_top)
|
|
{
|
|
if (y < 0)
|
|
y = 0;
|
|
if (y > layout->height)
|
|
y = layout->height;
|
|
|
|
*line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout, y, line_top);
|
|
if (*line == NULL)
|
|
{
|
|
*line = _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
|
|
|
|
if (line_top)
|
|
*line_top =
|
|
_gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
*line, layout);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_get_line_at_y:
|
|
* @layout: a #GtkLayout
|
|
* @target_iter: the iterator in which the result is stored
|
|
* @y: the y positition
|
|
* @line_top: location to store the y coordinate of the
|
|
* top of the line. (Can by %NULL.)
|
|
*
|
|
* Get the iter at the beginning of the line which is displayed
|
|
* at the given y.
|
|
**/
|
|
void
|
|
gtk_text_layout_get_line_at_y (GtkTextLayout *layout,
|
|
GtkTextIter *target_iter,
|
|
gint y,
|
|
gint *line_top)
|
|
{
|
|
GtkTextLine *line;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (target_iter != NULL);
|
|
|
|
get_line_at_y (layout, y, &line, line_top);
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
target_iter, line, 0);
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_get_iter_at_pixel (GtkTextLayout *layout,
|
|
GtkTextIter *target_iter,
|
|
gint x,
|
|
gint y)
|
|
{
|
|
gint trailing;
|
|
|
|
gtk_text_layout_get_iter_at_position (layout, target_iter, &trailing, x, y);
|
|
|
|
gtk_text_iter_forward_chars (target_iter, trailing);
|
|
}
|
|
|
|
void gtk_text_layout_get_iter_at_position (GtkTextLayout *layout,
|
|
GtkTextIter *target_iter,
|
|
gint *trailing,
|
|
gint x,
|
|
gint y)
|
|
{
|
|
GtkTextLine *line;
|
|
gint byte_index;
|
|
gint line_top;
|
|
GtkTextLineDisplay *display;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (target_iter != NULL);
|
|
|
|
get_line_at_y (layout, y, &line, &line_top);
|
|
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
|
|
x -= display->x_offset;
|
|
y -= line_top + display->top_margin;
|
|
|
|
/* If we are below the layout, position the cursor at the last character
|
|
* of the line.
|
|
*/
|
|
if (y > display->height - display->top_margin - display->bottom_margin)
|
|
{
|
|
byte_index = _gtk_text_line_byte_count (line);
|
|
*trailing = 0;
|
|
}
|
|
else
|
|
{
|
|
/* Ignore the "outside" return value from pango. Pango is doing
|
|
* the right thing even if we are outside the layout in the
|
|
* x-direction.
|
|
*/
|
|
pango_layout_xy_to_index (display->layout, x * PANGO_SCALE, y * PANGO_SCALE,
|
|
&byte_index, trailing);
|
|
}
|
|
|
|
line_display_index_to_iter (layout, display, target_iter, byte_index, 0);
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
|
|
|
|
/**
|
|
* gtk_text_layout_get_cursor_locations:
|
|
* @layout: a #GtkTextLayout
|
|
* @iter: a #GtkTextIter
|
|
* @strong_pos: location to store the strong cursor position (may be %NULL)
|
|
* @weak_pos: location to store the weak cursor position (may be %NULL)
|
|
*
|
|
* Given an iterator within a text layout, determine the positions of the
|
|
* strong and weak cursors if the insertion point is at that
|
|
* iterator. The position of each cursor is stored as a zero-width
|
|
* rectangle. The strong cursor location is the location where
|
|
* characters of the directionality equal to the base direction of the
|
|
* paragraph are inserted. The weak cursor location is the location
|
|
* where characters of the directionality opposite to the base
|
|
* direction of the paragraph are inserted.
|
|
**/
|
|
void
|
|
gtk_text_layout_get_cursor_locations (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
GdkRectangle *strong_pos,
|
|
GdkRectangle *weak_pos)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
gint line_top;
|
|
gint index;
|
|
GtkTextIter insert_iter;
|
|
|
|
PangoRectangle pango_strong_pos;
|
|
PangoRectangle pango_weak_pos;
|
|
|
|
g_return_if_fail (layout != NULL);
|
|
g_return_if_fail (iter != NULL);
|
|
|
|
line = _gtk_text_iter_get_text_line (iter);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
index = line_display_iter_to_index (layout, display, iter);
|
|
|
|
line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
|
|
gtk_text_buffer_get_iter_at_mark (layout->buffer, &insert_iter,
|
|
gtk_text_buffer_get_insert (layout->buffer));
|
|
|
|
if (gtk_text_iter_equal (iter, &insert_iter))
|
|
index += layout->preedit_cursor - layout->preedit_len;
|
|
|
|
pango_layout_get_cursor_pos (display->layout, index,
|
|
strong_pos ? &pango_strong_pos : NULL,
|
|
weak_pos ? &pango_weak_pos : NULL);
|
|
|
|
if (strong_pos)
|
|
{
|
|
strong_pos->x = display->x_offset + pango_strong_pos.x / PANGO_SCALE;
|
|
strong_pos->y = line_top + display->top_margin + pango_strong_pos.y / PANGO_SCALE;
|
|
strong_pos->width = 0;
|
|
strong_pos->height = pango_strong_pos.height / PANGO_SCALE;
|
|
}
|
|
|
|
if (weak_pos)
|
|
{
|
|
weak_pos->x = display->x_offset + pango_weak_pos.x / PANGO_SCALE;
|
|
weak_pos->y = line_top + display->top_margin + pango_weak_pos.y / PANGO_SCALE;
|
|
weak_pos->width = 0;
|
|
weak_pos->height = pango_weak_pos.height / PANGO_SCALE;
|
|
}
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
|
|
/**
|
|
* _gtk_text_layout_get_block_cursor:
|
|
* @layout: a #GtkTextLayout
|
|
* @pos: a #GdkRectangle to store block cursor position
|
|
*
|
|
* If layout is to display a block cursor, calculates its position
|
|
* and returns %TRUE. Otherwise it returns %FALSE. In case when
|
|
* cursor is visible, it simply returns the position stored in
|
|
* the line display, otherwise it has to compute the position
|
|
* (see get_block_cursor()).
|
|
**/
|
|
gboolean
|
|
_gtk_text_layout_get_block_cursor (GtkTextLayout *layout,
|
|
GdkRectangle *pos)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
GtkTextIter iter;
|
|
GdkRectangle rect;
|
|
gboolean block = FALSE;
|
|
|
|
g_return_val_if_fail (layout != NULL, FALSE);
|
|
|
|
gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
|
|
gtk_text_buffer_get_insert (layout->buffer));
|
|
line = _gtk_text_iter_get_text_line (&iter);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
|
|
if (display->has_block_cursor)
|
|
{
|
|
block = TRUE;
|
|
rect = display->block_cursor;
|
|
}
|
|
else
|
|
{
|
|
gint index = display->insert_index;
|
|
|
|
if (index < 0)
|
|
index = gtk_text_iter_get_line_index (&iter);
|
|
|
|
if (get_block_cursor (layout, display, &iter, index, &rect, NULL))
|
|
block = TRUE;
|
|
}
|
|
|
|
if (block && pos)
|
|
{
|
|
gint line_top;
|
|
|
|
line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
|
|
*pos = rect;
|
|
pos->x += display->x_offset;
|
|
pos->y += line_top + display->top_margin;
|
|
}
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
return block;
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_get_line_yrange:
|
|
* @layout: a #GtkTextLayout
|
|
* @iter: a #GtkTextIter
|
|
* @y: location to store the top of the paragraph in pixels,
|
|
* or %NULL.
|
|
* @height location to store the height of the paragraph in pixels,
|
|
* or %NULL.
|
|
*
|
|
* Find the range of y coordinates for the paragraph containing
|
|
* the given iter.
|
|
**/
|
|
void
|
|
gtk_text_layout_get_line_yrange (GtkTextLayout *layout,
|
|
const GtkTextIter *iter,
|
|
gint *y,
|
|
gint *height)
|
|
{
|
|
GtkTextLine *line;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
|
|
|
|
line = _gtk_text_iter_get_text_line (iter);
|
|
|
|
if (y)
|
|
*y = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
if (height)
|
|
{
|
|
GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
|
|
if (line_data)
|
|
*height = line_data->height;
|
|
else
|
|
*height = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* _gtk_text_layout_get_line_xrange:
|
|
* @layout: a #GtkTextLayout
|
|
* @iter: a #GtkTextIter
|
|
* @x: location to store the top of the paragraph in pixels,
|
|
* or %NULL.
|
|
* @width location to store the height of the paragraph in pixels,
|
|
* or %NULL.
|
|
*
|
|
* Find the range of X coordinates for the paragraph containing
|
|
* the given iter. Private for 2.0 due to API freeze, could
|
|
* be made public for 2.2.
|
|
**/
|
|
void
|
|
_gtk_text_layout_get_line_xrange (GtkTextLayout *layout,
|
|
const GtkTextIter *iter,
|
|
gint *x,
|
|
gint *width)
|
|
{
|
|
GtkTextLine *line;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
|
|
|
|
line = _gtk_text_iter_get_text_line (iter);
|
|
|
|
if (x)
|
|
*x = 0; /* FIXME This is wrong; should represent the first available cursor position */
|
|
|
|
if (width)
|
|
{
|
|
GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout);
|
|
if (line_data)
|
|
*width = line_data->width;
|
|
else
|
|
*width = 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_get_iter_location (GtkTextLayout *layout,
|
|
const GtkTextIter *iter,
|
|
GdkRectangle *rect)
|
|
{
|
|
PangoRectangle pango_rect;
|
|
GtkTextLine *line;
|
|
GtkTextBTree *tree;
|
|
GtkTextLineDisplay *display;
|
|
gint byte_index;
|
|
gint x_offset;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
|
|
g_return_if_fail (rect != NULL);
|
|
|
|
tree = _gtk_text_iter_get_btree (iter);
|
|
line = _gtk_text_iter_get_text_line (iter);
|
|
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
|
|
rect->y = _gtk_text_btree_find_line_top (tree, line, layout);
|
|
|
|
x_offset = display->x_offset * PANGO_SCALE;
|
|
|
|
byte_index = gtk_text_iter_get_line_index (iter);
|
|
|
|
pango_layout_index_to_pos (display->layout, byte_index, &pango_rect);
|
|
|
|
rect->x = PANGO_PIXELS (x_offset + pango_rect.x);
|
|
rect->y += PANGO_PIXELS (pango_rect.y) + display->top_margin;
|
|
rect->width = PANGO_PIXELS (pango_rect.width);
|
|
rect->height = PANGO_PIXELS (pango_rect.height);
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
|
|
/* FFIXX */
|
|
|
|
/* Find the iter for the logical beginning of the first display line whose
|
|
* top y is >= y. If none exists, move the iter to the logical beginning
|
|
* of the last line in the buffer.
|
|
*/
|
|
static void
|
|
find_display_line_below (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint y)
|
|
{
|
|
GtkTextLine *line, *next;
|
|
GtkTextLine *found_line = NULL;
|
|
gint line_top;
|
|
gint found_byte = 0;
|
|
|
|
line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout, y, &line_top);
|
|
if (!line)
|
|
{
|
|
line =
|
|
_gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
|
|
|
|
line_top =
|
|
_gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
}
|
|
|
|
while (line && !found_line)
|
|
{
|
|
GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
PangoLayoutIter *layout_iter;
|
|
|
|
layout_iter = pango_layout_get_iter (display->layout);
|
|
|
|
line_top += display->top_margin;
|
|
|
|
do
|
|
{
|
|
gint first_y, last_y;
|
|
PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
|
|
|
|
found_byte = layout_line->start_index;
|
|
|
|
if (line_top >= y)
|
|
{
|
|
found_line = line;
|
|
break;
|
|
}
|
|
|
|
pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
|
|
line_top += (last_y - first_y) / PANGO_SCALE;
|
|
}
|
|
while (pango_layout_iter_next_line (layout_iter));
|
|
|
|
pango_layout_iter_free (layout_iter);
|
|
|
|
line_top += display->bottom_margin;
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
next = _gtk_text_line_next_excluding_last (line);
|
|
if (!next)
|
|
found_line = line;
|
|
|
|
line = next;
|
|
}
|
|
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
iter, found_line, found_byte);
|
|
}
|
|
|
|
/* Find the iter for the logical beginning of the last display line whose
|
|
* top y is >= y. If none exists, move the iter to the logical beginning
|
|
* of the first line in the buffer.
|
|
*/
|
|
static void
|
|
find_display_line_above (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint y)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLine *found_line = NULL;
|
|
gint line_top;
|
|
gint found_byte = 0;
|
|
|
|
line = _gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer), layout, y, &line_top);
|
|
if (!line)
|
|
{
|
|
line = _gtk_text_btree_get_end_iter_line (_gtk_text_buffer_get_btree (layout->buffer));
|
|
|
|
line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer), line, layout);
|
|
}
|
|
|
|
while (line && !found_line)
|
|
{
|
|
GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
PangoRectangle logical_rect;
|
|
PangoLayoutIter *layout_iter;
|
|
gint tmp_top;
|
|
|
|
layout_iter = pango_layout_get_iter (display->layout);
|
|
|
|
line_top -= display->top_margin + display->bottom_margin;
|
|
pango_layout_iter_get_layout_extents (layout_iter, NULL, &logical_rect);
|
|
line_top -= logical_rect.height / PANGO_SCALE;
|
|
|
|
tmp_top = line_top + display->top_margin;
|
|
|
|
do
|
|
{
|
|
gint first_y, last_y;
|
|
PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
|
|
|
|
found_byte = layout_line->start_index;
|
|
|
|
pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
|
|
|
|
tmp_top -= (last_y - first_y) / PANGO_SCALE;
|
|
|
|
if (tmp_top < y)
|
|
{
|
|
found_line = line;
|
|
pango_layout_iter_free (layout_iter);
|
|
goto done;
|
|
}
|
|
}
|
|
while (pango_layout_iter_next_line (layout_iter));
|
|
|
|
pango_layout_iter_free (layout_iter);
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
line = _gtk_text_line_previous (line);
|
|
}
|
|
|
|
done:
|
|
|
|
if (found_line)
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
iter, found_line, found_byte);
|
|
else
|
|
gtk_text_buffer_get_iter_at_offset (layout->buffer, iter, 0);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_clamp_iter_to_vrange:
|
|
* @layout: a #GtkTextLayout
|
|
* @iter: a #GtkTextIter
|
|
* @top: the top of the range
|
|
* @bottom: the bottom the range
|
|
*
|
|
* If the iterator is not fully in the range @top <= y < @bottom,
|
|
* then, if possible, move it the minimum distance so that the
|
|
* iterator in this range.
|
|
*
|
|
* Returns: %TRUE if the iterator was moved, otherwise %FALSE.
|
|
**/
|
|
gboolean
|
|
gtk_text_layout_clamp_iter_to_vrange (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint top,
|
|
gint bottom)
|
|
{
|
|
GdkRectangle iter_rect;
|
|
|
|
gtk_text_layout_get_iter_location (layout, iter, &iter_rect);
|
|
|
|
/* If the iter is at least partially above the range, put the iter
|
|
* at the first fully visible line after the range.
|
|
*/
|
|
if (iter_rect.y < top)
|
|
{
|
|
find_display_line_below (layout, iter, top);
|
|
|
|
return TRUE;
|
|
}
|
|
/* Otherwise, if the iter is at least partially below the screen, put the
|
|
* iter on the last logical position of the last completely visible
|
|
* line on screen
|
|
*/
|
|
else if (iter_rect.y + iter_rect.height > bottom)
|
|
{
|
|
find_display_line_above (layout, iter, bottom);
|
|
|
|
return TRUE;
|
|
}
|
|
else
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_move_iter_to_previous_line:
|
|
* @layout: a #GtkLayout
|
|
* @iter: a #GtkTextIter
|
|
*
|
|
* Move the iterator to the beginning of the previous line. The lines
|
|
* of a wrapped paragraph are treated as distinct for this operation.
|
|
**/
|
|
gboolean
|
|
gtk_text_layout_move_iter_to_previous_line (GtkTextLayout *layout,
|
|
GtkTextIter *iter)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
gint line_byte;
|
|
GSList *tmp_list;
|
|
PangoLayoutLine *layout_line;
|
|
GtkTextIter orig;
|
|
gboolean update_byte = FALSE;
|
|
|
|
g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
|
|
g_return_val_if_fail (iter != NULL, FALSE);
|
|
|
|
orig = *iter;
|
|
|
|
|
|
line = _gtk_text_iter_get_text_line (iter);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
line_byte = line_display_iter_to_index (layout, display, iter);
|
|
|
|
/* If display->height == 0 then the line is invisible, so don't
|
|
* move onto it.
|
|
*/
|
|
while (display->height == 0)
|
|
{
|
|
GtkTextLine *prev_line;
|
|
|
|
prev_line = _gtk_text_line_previous (line);
|
|
|
|
if (prev_line == NULL)
|
|
{
|
|
line_display_index_to_iter (layout, display, iter, 0, 0);
|
|
goto out;
|
|
}
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
line = prev_line;
|
|
display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
|
|
update_byte = TRUE;
|
|
}
|
|
|
|
tmp_list = pango_layout_get_lines_readonly (display->layout);
|
|
layout_line = tmp_list->data;
|
|
|
|
if (update_byte)
|
|
{
|
|
line_byte = layout_line->start_index + layout_line->length;
|
|
}
|
|
|
|
if (line_byte < layout_line->length || !tmp_list->next) /* first line of paragraph */
|
|
{
|
|
GtkTextLine *prev_line;
|
|
|
|
prev_line = _gtk_text_line_previous (line);
|
|
|
|
/* first line of the whole buffer, do not move the iter and return FALSE */
|
|
if (prev_line == NULL)
|
|
goto out;
|
|
|
|
while (prev_line)
|
|
{
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
|
|
|
|
if (display->height > 0)
|
|
{
|
|
tmp_list = g_slist_last (pango_layout_get_lines_readonly (display->layout));
|
|
layout_line = tmp_list->data;
|
|
|
|
line_display_index_to_iter (layout, display, iter,
|
|
layout_line->start_index + layout_line->length, 0);
|
|
break;
|
|
}
|
|
|
|
prev_line = _gtk_text_line_previous (prev_line);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
gint prev_offset = layout_line->start_index;
|
|
|
|
tmp_list = tmp_list->next;
|
|
while (tmp_list)
|
|
{
|
|
layout_line = tmp_list->data;
|
|
|
|
if (line_byte < layout_line->start_index + layout_line->length ||
|
|
!tmp_list->next)
|
|
{
|
|
line_display_index_to_iter (layout, display, iter, prev_offset, 0);
|
|
break;
|
|
}
|
|
|
|
prev_offset = layout_line->start_index;
|
|
tmp_list = tmp_list->next;
|
|
}
|
|
}
|
|
|
|
out:
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
return
|
|
!gtk_text_iter_equal (iter, &orig) &&
|
|
!gtk_text_iter_is_end (iter);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_move_iter_to_next_line:
|
|
* @layout: a #GtkLayout
|
|
* @iter: a #GtkTextIter
|
|
*
|
|
* Move the iterator to the beginning of the next line. The
|
|
* lines of a wrapped paragraph are treated as distinct for
|
|
* this operation.
|
|
**/
|
|
gboolean
|
|
gtk_text_layout_move_iter_to_next_line (GtkTextLayout *layout,
|
|
GtkTextIter *iter)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
gint line_byte;
|
|
GtkTextIter orig;
|
|
gboolean found = FALSE;
|
|
gboolean found_after = FALSE;
|
|
gboolean first = TRUE;
|
|
|
|
g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
|
|
g_return_val_if_fail (iter != NULL, FALSE);
|
|
|
|
orig = *iter;
|
|
|
|
line = _gtk_text_iter_get_text_line (iter);
|
|
|
|
while (line && !found_after)
|
|
{
|
|
GSList *tmp_list;
|
|
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
|
|
if (display->height == 0)
|
|
goto next;
|
|
|
|
if (first)
|
|
{
|
|
line_byte = line_display_iter_to_index (layout, display, iter);
|
|
first = FALSE;
|
|
}
|
|
else
|
|
line_byte = 0;
|
|
|
|
tmp_list = pango_layout_get_lines_readonly (display->layout);
|
|
while (tmp_list && !found_after)
|
|
{
|
|
PangoLayoutLine *layout_line = tmp_list->data;
|
|
|
|
if (found)
|
|
{
|
|
line_display_index_to_iter (layout, display, iter,
|
|
layout_line->start_index, 0);
|
|
found_after = TRUE;
|
|
}
|
|
else if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
|
|
found = TRUE;
|
|
|
|
tmp_list = tmp_list->next;
|
|
}
|
|
|
|
next:
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
line = _gtk_text_line_next_excluding_last (line);
|
|
}
|
|
|
|
if (!found_after)
|
|
gtk_text_buffer_get_end_iter (layout->buffer, iter);
|
|
|
|
return
|
|
!gtk_text_iter_equal (iter, &orig) &&
|
|
!gtk_text_iter_is_end (iter);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_move_iter_to_line_end:
|
|
* @layout: a #GtkTextLayout
|
|
* @direction: if negative, move to beginning of line, otherwise
|
|
move to end of line.
|
|
*
|
|
* Move to the beginning or end of a display line.
|
|
**/
|
|
gboolean
|
|
gtk_text_layout_move_iter_to_line_end (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint direction)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
gint line_byte;
|
|
GSList *tmp_list;
|
|
GtkTextIter orig;
|
|
|
|
g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
|
|
g_return_val_if_fail (iter != NULL, FALSE);
|
|
|
|
orig = *iter;
|
|
|
|
line = _gtk_text_iter_get_text_line (iter);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
line_byte = line_display_iter_to_index (layout, display, iter);
|
|
|
|
tmp_list = pango_layout_get_lines_readonly (display->layout);
|
|
while (tmp_list)
|
|
{
|
|
PangoLayoutLine *layout_line = tmp_list->data;
|
|
|
|
if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next)
|
|
{
|
|
line_display_index_to_iter (layout, display, iter,
|
|
direction < 0 ? layout_line->start_index : layout_line->start_index + layout_line->length,
|
|
0);
|
|
|
|
/* FIXME: As a bad hack, we move back one position when we
|
|
* are inside a paragraph to avoid going to next line on a
|
|
* forced break not at whitespace. Real fix is to keep track
|
|
* of whether marks are at leading or trailing edge? */
|
|
if (direction > 0 && layout_line->length > 0 &&
|
|
!gtk_text_iter_ends_line (iter) &&
|
|
!_gtk_text_btree_char_is_invisible (iter))
|
|
gtk_text_iter_backward_char (iter);
|
|
break;
|
|
}
|
|
|
|
tmp_list = tmp_list->next;
|
|
}
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
return
|
|
!gtk_text_iter_equal (iter, &orig) &&
|
|
!gtk_text_iter_is_end (iter);
|
|
}
|
|
|
|
|
|
/**
|
|
* gtk_text_layout_iter_starts_line:
|
|
* @layout: a #GtkTextLayout
|
|
* @iter: iterator to test
|
|
*
|
|
* Tests whether an iterator is at the start of a display line.
|
|
**/
|
|
gboolean
|
|
gtk_text_layout_iter_starts_line (GtkTextLayout *layout,
|
|
const GtkTextIter *iter)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
gint line_byte;
|
|
GSList *tmp_list;
|
|
|
|
g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
|
|
g_return_val_if_fail (iter != NULL, FALSE);
|
|
|
|
line = _gtk_text_iter_get_text_line (iter);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
line_byte = line_display_iter_to_index (layout, display, iter);
|
|
|
|
tmp_list = pango_layout_get_lines_readonly (display->layout);
|
|
while (tmp_list)
|
|
{
|
|
PangoLayoutLine *layout_line = tmp_list->data;
|
|
|
|
if (line_byte < layout_line->start_index + layout_line->length ||
|
|
!tmp_list->next)
|
|
{
|
|
/* We're located on this line or the para delimiters before
|
|
* it
|
|
*/
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
if (line_byte == layout_line->start_index)
|
|
return TRUE;
|
|
else
|
|
return FALSE;
|
|
}
|
|
|
|
tmp_list = tmp_list->next;
|
|
}
|
|
|
|
g_assert_not_reached ();
|
|
return FALSE;
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_get_iter_at_line (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
GtkTextLine *line,
|
|
gint byte_offset)
|
|
{
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
iter, line, byte_offset);
|
|
}
|
|
|
|
|
|
/**
|
|
* gtk_text_layout_move_iter_to_x:
|
|
* @layout: a #GtkTextLayout
|
|
* @iter: a #GtkTextIter
|
|
* @x: X coordinate
|
|
*
|
|
* Keeping the iterator on the same line of the layout, move it to the
|
|
* specified X coordinate. The lines of a wrapped paragraph are
|
|
* treated as distinct for this operation.
|
|
**/
|
|
void
|
|
gtk_text_layout_move_iter_to_x (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint x)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
gint line_byte;
|
|
PangoLayoutIter *layout_iter;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (iter != NULL);
|
|
|
|
line = _gtk_text_iter_get_text_line (iter);
|
|
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
line_byte = line_display_iter_to_index (layout, display, iter);
|
|
|
|
layout_iter = pango_layout_get_iter (display->layout);
|
|
|
|
do
|
|
{
|
|
PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter);
|
|
|
|
if (line_byte < layout_line->start_index + layout_line->length ||
|
|
pango_layout_iter_at_last_line (layout_iter))
|
|
{
|
|
PangoRectangle logical_rect;
|
|
gint byte_index, trailing;
|
|
gint x_offset = display->x_offset * PANGO_SCALE;
|
|
|
|
pango_layout_iter_get_line_extents (layout_iter, NULL, &logical_rect);
|
|
|
|
pango_layout_line_x_to_index (layout_line,
|
|
x * PANGO_SCALE - x_offset - logical_rect.x,
|
|
&byte_index, &trailing);
|
|
|
|
line_display_index_to_iter (layout, display, iter, byte_index, trailing);
|
|
|
|
break;
|
|
}
|
|
}
|
|
while (pango_layout_iter_next_line (layout_iter));
|
|
|
|
pango_layout_iter_free (layout_iter);
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_move_iter_visually:
|
|
* @layout: a #GtkTextLayout
|
|
* @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.
|
|
**/
|
|
|
|
gboolean
|
|
gtk_text_layout_move_iter_visually (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint count)
|
|
{
|
|
GtkTextLineDisplay *display = NULL;
|
|
GtkTextIter orig;
|
|
GtkTextIter lineiter;
|
|
|
|
g_return_val_if_fail (layout != NULL, FALSE);
|
|
g_return_val_if_fail (iter != NULL, FALSE);
|
|
|
|
orig = *iter;
|
|
|
|
while (count != 0)
|
|
{
|
|
GtkTextLine *line = _gtk_text_iter_get_text_line (iter);
|
|
gint line_byte;
|
|
gint extra_back = 0;
|
|
gboolean strong;
|
|
|
|
int byte_count = _gtk_text_line_byte_count (line);
|
|
|
|
int new_index;
|
|
int new_trailing;
|
|
|
|
if (!display)
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
|
|
if (layout->cursor_direction == GTK_TEXT_DIR_NONE)
|
|
strong = TRUE;
|
|
else
|
|
strong = display->direction == layout->cursor_direction;
|
|
|
|
line_byte = line_display_iter_to_index (layout, display, iter);
|
|
|
|
if (count > 0)
|
|
{
|
|
pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, 1, &new_index, &new_trailing);
|
|
count--;
|
|
}
|
|
else
|
|
{
|
|
pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, -1, &new_index, &new_trailing);
|
|
count++;
|
|
}
|
|
|
|
/* We need to handle the preedit string specially. Well, we don't really need to
|
|
* handle it specially, since hopefully calling gtk_im_context_reset() will
|
|
* remove the preedit string; but if we start off in front of the preedit
|
|
* string (logically) and end up in or on the back edge of the preedit string,
|
|
* we should move the iter one place farther.
|
|
*/
|
|
if (layout->preedit_len > 0 && display->insert_index >= 0)
|
|
{
|
|
if (line_byte == display->insert_index + layout->preedit_len &&
|
|
new_index < display->insert_index + layout->preedit_len)
|
|
{
|
|
line_byte = display->insert_index;
|
|
extra_back = 1;
|
|
}
|
|
}
|
|
|
|
if (new_index < 0 || (new_index == 0 && extra_back))
|
|
{
|
|
do
|
|
{
|
|
line = _gtk_text_line_previous (line);
|
|
|
|
if (!line)
|
|
goto done;
|
|
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
&lineiter, line, 0);
|
|
}
|
|
while (totally_invisible_line (layout, line, &lineiter));
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
gtk_text_iter_forward_to_line_end (&lineiter);
|
|
new_index = gtk_text_iter_get_visible_line_index (&lineiter);
|
|
}
|
|
else if (new_index > byte_count)
|
|
{
|
|
do
|
|
{
|
|
line = _gtk_text_line_next_excluding_last (line);
|
|
if (!line)
|
|
goto done;
|
|
|
|
_gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
&lineiter, line, 0);
|
|
}
|
|
while (totally_invisible_line (layout, line, &lineiter));
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
new_index = 0;
|
|
}
|
|
|
|
line_display_index_to_iter (layout, display, iter, new_index, new_trailing);
|
|
if (extra_back)
|
|
gtk_text_iter_backward_char (iter);
|
|
}
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
done:
|
|
|
|
return
|
|
!gtk_text_iter_equal (iter, &orig) &&
|
|
!gtk_text_iter_is_end (iter);
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_spew (GtkTextLayout *layout)
|
|
{
|
|
#if 0
|
|
GtkTextDisplayLine *iter;
|
|
guint wrapped = 0;
|
|
guint paragraphs = 0;
|
|
GtkTextLine *last_line = NULL;
|
|
|
|
iter = layout->line_list;
|
|
while (iter != NULL)
|
|
{
|
|
if (iter->line != last_line)
|
|
{
|
|
printf ("%5u paragraph (%p)\n", paragraphs, iter->line);
|
|
++paragraphs;
|
|
last_line = iter->line;
|
|
}
|
|
|
|
printf (" %5u y: %d len: %d start: %d bytes: %d\n",
|
|
wrapped, iter->y, iter->length, iter->byte_offset,
|
|
iter->byte_count);
|
|
|
|
++wrapped;
|
|
iter = iter->next;
|
|
}
|
|
|
|
printf ("Layout %s recompute\n",
|
|
layout->need_recompute ? "needs" : "doesn't need");
|
|
|
|
printf ("Layout pars: %u lines: %u size: %d x %d Screen width: %d\n",
|
|
paragraphs, wrapped, layout->width,
|
|
layout->height, layout->screen_width);
|
|
#endif
|
|
}
|
|
|
|
/* Catch all situations that move the insertion point.
|
|
*/
|
|
static void
|
|
gtk_text_layout_mark_set_handler (GtkTextBuffer *buffer,
|
|
const GtkTextIter *location,
|
|
GtkTextMark *mark,
|
|
gpointer data)
|
|
{
|
|
GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
|
|
|
|
if (mark == gtk_text_buffer_get_insert (buffer))
|
|
gtk_text_layout_update_cursor_line (layout);
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_buffer_insert_text (GtkTextBuffer *textbuffer,
|
|
GtkTextIter *iter,
|
|
gchar *str,
|
|
gint len,
|
|
gpointer data)
|
|
{
|
|
GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
|
|
|
|
gtk_text_layout_update_cursor_line (layout);
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_buffer_delete_range (GtkTextBuffer *textbuffer,
|
|
GtkTextIter *start,
|
|
GtkTextIter *end,
|
|
gpointer data)
|
|
{
|
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GtkTextLayout *layout = GTK_TEXT_LAYOUT (data);
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gtk_text_layout_update_cursor_line (layout);
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}
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#define __GTK_TEXT_LAYOUT_C__
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#include "gtkaliasdef.c"
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