01136618b8
We made a number of unchecked accesses to the selection requestor, which could cause X errors if the selection requestor vanished (or we were sent invalid events). Add error traps around all of them. See https://bugzilla.redhat.com/show_bug.cgi?id=1210814 for an example of a crash that could be caused by this. (There are about 1000 instances of such a crash in http://retrace.fedoraproject.org though no linked bug reports specifically talk about cut-and-paste or DND.) https://bugzilla.gnome.org/show_bug.cgi?id=756881
3307 lines
85 KiB
C
3307 lines
85 KiB
C
/* GTK - The GIMP Toolkit
|
||
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
|
||
*
|
||
* This library is free software; you can redistribute it and/or
|
||
* modify it under the terms of the GNU Lesser General Public
|
||
* License as published by the Free Software Foundation; either
|
||
* version 2 of the License, or (at your option) any later version.
|
||
*
|
||
* This library is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
* Lesser General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU Lesser General Public
|
||
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
||
*/
|
||
|
||
/* This file implements most of the work of the ICCCM selection protocol.
|
||
* The code was written after an intensive study of the equivalent part
|
||
* of John Ousterhout’s Tk toolkit, and does many things in much the
|
||
* same way.
|
||
*
|
||
* The one thing in the ICCCM that isn’t fully supported here (or in Tk)
|
||
* is side effects targets. For these to be handled properly, MULTIPLE
|
||
* targets need to be done in the order specified. This cannot be
|
||
* guaranteed with the way we do things, since if we are doing INCR
|
||
* transfers, the order will depend on the timing of the requestor.
|
||
*
|
||
* By Owen Taylor <owt1@cornell.edu> 8/16/97
|
||
*/
|
||
|
||
/* Terminology note: when not otherwise specified, the term "incr" below
|
||
* refers to the _sending_ part of the INCR protocol. The receiving
|
||
* portion is referred to just as “retrieval”. (Terminology borrowed
|
||
* from Tk, because there is no good opposite to “retrieval” in English.
|
||
* “send” can’t be made into a noun gracefully and we’re already using
|
||
* “emission” for something else ....)
|
||
*/
|
||
|
||
/* The MOTIF entry widget seems to ask for the TARGETS target, then
|
||
(regardless of the reply) ask for the TEXT target. It's slightly
|
||
possible though that it somehow thinks we are responding negatively
|
||
to the TARGETS request, though I don't really think so ... */
|
||
|
||
/*
|
||
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
|
||
* file for a list of people on the GTK+ Team. See the ChangeLog
|
||
* files for a list of changes. These files are distributed with
|
||
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
|
||
*/
|
||
|
||
/**
|
||
* SECTION:gtkselection
|
||
* @Title: Selections
|
||
* @Short_description: Functions for handling inter-process communication
|
||
* via selections
|
||
* @See_also: #GtkWidget - Much of the operation of selections happens via
|
||
* signals for #GtkWidget. In particular, if you are using the functions
|
||
* in this section, you may need to pay attention to
|
||
* #GtkWidget::selection-get, #GtkWidget::selection-received and
|
||
* #GtkWidget::selection-clear-event signals
|
||
*
|
||
* The selection mechanism provides the basis for different types
|
||
* of communication between processes. In particular, drag and drop and
|
||
* #GtkClipboard work via selections. You will very seldom or
|
||
* never need to use most of the functions in this section directly;
|
||
* #GtkClipboard provides a nicer interface to the same functionality.
|
||
*
|
||
* Some of the datatypes defined this section are used in
|
||
* the #GtkClipboard and drag-and-drop API’s as well. The
|
||
* #GtkTargetEntry and #GtkTargetList objects represent
|
||
* lists of data types that are supported when sending or
|
||
* receiving data. The #GtkSelectionData object is used to
|
||
* store a chunk of data along with the data type and other
|
||
* associated information.
|
||
*/
|
||
|
||
#include "config.h"
|
||
|
||
#include "gtkselection.h"
|
||
#include "gtkselectionprivate.h"
|
||
|
||
#include <stdarg.h>
|
||
#include <string.h>
|
||
#include "gdk.h"
|
||
|
||
#include "gtkmain.h"
|
||
#include "gtkdebug.h"
|
||
#include "gtktextbufferrichtext.h"
|
||
#include "gtkintl.h"
|
||
#include "gdk-pixbuf/gdk-pixbuf.h"
|
||
|
||
#ifdef GDK_WINDOWING_X11
|
||
#include "x11/gdkx.h"
|
||
#endif
|
||
|
||
#ifdef GDK_WINDOWING_WIN32
|
||
#include "win32/gdkwin32.h"
|
||
#endif
|
||
|
||
#ifdef GDK_WINDOWING_WAYLAND
|
||
#include <gdk/wayland/gdkwayland.h>
|
||
#endif
|
||
|
||
#undef DEBUG_SELECTION
|
||
|
||
/* Maximum size of a sent chunk, in bytes. Also the default size of
|
||
our buffers */
|
||
#ifdef GDK_WINDOWING_X11
|
||
#define GTK_SELECTION_MAX_SIZE(display) \
|
||
GDK_IS_X11_DISPLAY (display) ? \
|
||
MIN(262144, \
|
||
XExtendedMaxRequestSize (GDK_DISPLAY_XDISPLAY (display)) == 0 \
|
||
? XMaxRequestSize (GDK_DISPLAY_XDISPLAY (display)) - 100 \
|
||
: XExtendedMaxRequestSize (GDK_DISPLAY_XDISPLAY (display)) - 100)\
|
||
: G_MAXINT
|
||
#else
|
||
/* No chunks on Win32 */
|
||
#define GTK_SELECTION_MAX_SIZE(display) G_MAXINT
|
||
#endif
|
||
|
||
#define IDLE_ABORT_TIME 30
|
||
|
||
enum {
|
||
INCR,
|
||
MULTIPLE,
|
||
TARGETS,
|
||
TIMESTAMP,
|
||
SAVE_TARGETS,
|
||
LAST_ATOM
|
||
};
|
||
|
||
typedef struct _GtkSelectionInfo GtkSelectionInfo;
|
||
typedef struct _GtkIncrConversion GtkIncrConversion;
|
||
typedef struct _GtkIncrInfo GtkIncrInfo;
|
||
typedef struct _GtkRetrievalInfo GtkRetrievalInfo;
|
||
|
||
struct _GtkSelectionInfo
|
||
{
|
||
GdkAtom selection;
|
||
GtkWidget *widget; /* widget that owns selection */
|
||
guint32 time; /* time used to acquire selection */
|
||
GdkDisplay *display; /* needed in gtk_selection_remove_all */
|
||
};
|
||
|
||
struct _GtkIncrConversion
|
||
{
|
||
GdkAtom target; /* Requested target */
|
||
GdkAtom property; /* Property to store in */
|
||
GtkSelectionData data; /* The data being supplied */
|
||
gint offset; /* Current offset in sent selection.
|
||
* -1 => All done
|
||
* -2 => Only the final (empty) portion
|
||
* left to send */
|
||
};
|
||
|
||
struct _GtkIncrInfo
|
||
{
|
||
GdkWindow *requestor; /* Requestor window - we create a GdkWindow
|
||
so we can receive events */
|
||
GdkAtom selection; /* Selection we're sending */
|
||
|
||
GtkIncrConversion *conversions; /* Information about requested conversions -
|
||
* With MULTIPLE requests (benighted 1980's
|
||
* hardware idea), there can be more than
|
||
* one */
|
||
gint num_conversions;
|
||
gint num_incrs; /* number of remaining INCR style transactions */
|
||
guint32 idle_time;
|
||
};
|
||
|
||
|
||
struct _GtkRetrievalInfo
|
||
{
|
||
GtkWidget *widget;
|
||
GdkAtom selection; /* Selection being retrieved. */
|
||
GdkAtom target; /* Form of selection that we requested */
|
||
guint32 idle_time; /* Number of seconds since we last heard
|
||
from selection owner */
|
||
guchar *buffer; /* Buffer in which to accumulate results */
|
||
gint offset; /* Current offset in buffer, -1 indicates
|
||
not yet started */
|
||
guint32 notify_time; /* Timestamp from SelectionNotify */
|
||
};
|
||
|
||
/* Local Functions */
|
||
static void gtk_selection_init (void);
|
||
static gboolean gtk_selection_incr_timeout (GtkIncrInfo *info);
|
||
static gboolean gtk_selection_retrieval_timeout (GtkRetrievalInfo *info);
|
||
static void gtk_selection_retrieval_report (GtkRetrievalInfo *info,
|
||
GdkAtom type,
|
||
gint format,
|
||
guchar *buffer,
|
||
gint length,
|
||
guint32 time);
|
||
static void gtk_selection_invoke_handler (GtkWidget *widget,
|
||
GtkSelectionData *data,
|
||
guint time);
|
||
static void gtk_selection_default_handler (GtkWidget *widget,
|
||
GtkSelectionData *data);
|
||
static int gtk_selection_bytes_per_item (gint format);
|
||
|
||
/* Local Data */
|
||
static gint initialize = TRUE;
|
||
static GList *current_retrievals = NULL;
|
||
static GList *current_incrs = NULL;
|
||
static GList *current_selections = NULL;
|
||
|
||
static GdkAtom gtk_selection_atoms[LAST_ATOM];
|
||
static const char gtk_selection_handler_key[] = "gtk-selection-handlers";
|
||
|
||
/****************
|
||
* Target Lists *
|
||
****************/
|
||
|
||
/*
|
||
* Target lists
|
||
*/
|
||
|
||
|
||
/**
|
||
* gtk_target_list_new:
|
||
* @targets: (array length=ntargets) (allow-none): Pointer to an array
|
||
* of #GtkTargetEntry
|
||
* @ntargets: number of entries in @targets.
|
||
*
|
||
* Creates a new #GtkTargetList from an array of #GtkTargetEntry.
|
||
*
|
||
* Returns: (transfer full): the new #GtkTargetList.
|
||
**/
|
||
GtkTargetList *
|
||
gtk_target_list_new (const GtkTargetEntry *targets,
|
||
guint ntargets)
|
||
{
|
||
GtkTargetList *result = g_slice_new (GtkTargetList);
|
||
result->list = NULL;
|
||
result->ref_count = 1;
|
||
|
||
if (targets)
|
||
gtk_target_list_add_table (result, targets, ntargets);
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gtk_target_list_ref:
|
||
* @list: a #GtkTargetList
|
||
*
|
||
* Increases the reference count of a #GtkTargetList by one.
|
||
*
|
||
* Returns: the passed in #GtkTargetList.
|
||
**/
|
||
GtkTargetList *
|
||
gtk_target_list_ref (GtkTargetList *list)
|
||
{
|
||
g_return_val_if_fail (list != NULL, NULL);
|
||
|
||
list->ref_count++;
|
||
|
||
return list;
|
||
}
|
||
|
||
/**
|
||
* gtk_target_list_unref:
|
||
* @list: a #GtkTargetList
|
||
*
|
||
* Decreases the reference count of a #GtkTargetList by one.
|
||
* If the resulting reference count is zero, frees the list.
|
||
**/
|
||
void
|
||
gtk_target_list_unref (GtkTargetList *list)
|
||
{
|
||
g_return_if_fail (list != NULL);
|
||
g_return_if_fail (list->ref_count > 0);
|
||
|
||
list->ref_count--;
|
||
if (list->ref_count == 0)
|
||
{
|
||
GList *tmp_list = list->list;
|
||
while (tmp_list)
|
||
{
|
||
GtkTargetPair *pair = tmp_list->data;
|
||
g_slice_free (GtkTargetPair, pair);
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
g_list_free (list->list);
|
||
g_slice_free (GtkTargetList, list);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_target_list_add:
|
||
* @list: a #GtkTargetList
|
||
* @target: the interned atom representing the target
|
||
* @flags: the flags for this target
|
||
* @info: an ID that will be passed back to the application
|
||
*
|
||
* Appends another target to a #GtkTargetList.
|
||
**/
|
||
void
|
||
gtk_target_list_add (GtkTargetList *list,
|
||
GdkAtom target,
|
||
guint flags,
|
||
guint info)
|
||
{
|
||
GtkTargetPair *pair;
|
||
|
||
g_return_if_fail (list != NULL);
|
||
|
||
pair = g_slice_new (GtkTargetPair);
|
||
pair->target = target;
|
||
pair->flags = flags;
|
||
pair->info = info;
|
||
|
||
list->list = g_list_append (list->list, pair);
|
||
}
|
||
|
||
static GdkAtom utf8_atom;
|
||
static GdkAtom text_atom;
|
||
static GdkAtom ctext_atom;
|
||
static GdkAtom text_plain_atom;
|
||
static GdkAtom text_plain_utf8_atom;
|
||
static GdkAtom text_plain_locale_atom;
|
||
static GdkAtom text_uri_list_atom;
|
||
|
||
static void
|
||
init_atoms (void)
|
||
{
|
||
gchar *tmp;
|
||
const gchar *charset;
|
||
|
||
if (!utf8_atom)
|
||
{
|
||
utf8_atom = gdk_atom_intern_static_string ("UTF8_STRING");
|
||
text_atom = gdk_atom_intern_static_string ("TEXT");
|
||
ctext_atom = gdk_atom_intern_static_string ("COMPOUND_TEXT");
|
||
text_plain_atom = gdk_atom_intern_static_string ("text/plain");
|
||
text_plain_utf8_atom = gdk_atom_intern_static_string ("text/plain;charset=utf-8");
|
||
g_get_charset (&charset);
|
||
tmp = g_strdup_printf ("text/plain;charset=%s", charset);
|
||
text_plain_locale_atom = gdk_atom_intern (tmp, FALSE);
|
||
g_free (tmp);
|
||
|
||
text_uri_list_atom = gdk_atom_intern_static_string ("text/uri-list");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_target_list_add_text_targets:
|
||
* @list: a #GtkTargetList
|
||
* @info: an ID that will be passed back to the application
|
||
*
|
||
* Appends the text targets supported by #GtkSelectionData to
|
||
* the target list. All targets are added with the same @info.
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
void
|
||
gtk_target_list_add_text_targets (GtkTargetList *list,
|
||
guint info)
|
||
{
|
||
g_return_if_fail (list != NULL);
|
||
|
||
init_atoms ();
|
||
|
||
/* Keep in sync with gtk_selection_data_targets_include_text()
|
||
*/
|
||
gtk_target_list_add (list, utf8_atom, 0, info);
|
||
gtk_target_list_add (list, ctext_atom, 0, info);
|
||
gtk_target_list_add (list, text_atom, 0, info);
|
||
gtk_target_list_add (list, GDK_TARGET_STRING, 0, info);
|
||
gtk_target_list_add (list, text_plain_utf8_atom, 0, info);
|
||
if (!g_get_charset (NULL))
|
||
gtk_target_list_add (list, text_plain_locale_atom, 0, info);
|
||
gtk_target_list_add (list, text_plain_atom, 0, info);
|
||
}
|
||
|
||
/**
|
||
* gtk_target_list_add_rich_text_targets:
|
||
* @list: a #GtkTargetList
|
||
* @info: an ID that will be passed back to the application
|
||
* @deserializable: if %TRUE, then deserializable rich text formats
|
||
* will be added, serializable formats otherwise.
|
||
* @buffer: a #GtkTextBuffer.
|
||
*
|
||
* Appends the rich text targets registered with
|
||
* gtk_text_buffer_register_serialize_format() or
|
||
* gtk_text_buffer_register_deserialize_format() to the target list. All
|
||
* targets are added with the same @info.
|
||
*
|
||
* Since: 2.10
|
||
**/
|
||
void
|
||
gtk_target_list_add_rich_text_targets (GtkTargetList *list,
|
||
guint info,
|
||
gboolean deserializable,
|
||
GtkTextBuffer *buffer)
|
||
{
|
||
GdkAtom *atoms;
|
||
gint n_atoms;
|
||
gint i;
|
||
|
||
g_return_if_fail (list != NULL);
|
||
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
|
||
|
||
if (deserializable)
|
||
atoms = gtk_text_buffer_get_deserialize_formats (buffer, &n_atoms);
|
||
else
|
||
atoms = gtk_text_buffer_get_serialize_formats (buffer, &n_atoms);
|
||
|
||
for (i = 0; i < n_atoms; i++)
|
||
gtk_target_list_add (list, atoms[i], 0, info);
|
||
|
||
g_free (atoms);
|
||
}
|
||
|
||
/**
|
||
* gtk_target_list_add_image_targets:
|
||
* @list: a #GtkTargetList
|
||
* @info: an ID that will be passed back to the application
|
||
* @writable: whether to add only targets for which GTK+ knows
|
||
* how to convert a pixbuf into the format
|
||
*
|
||
* Appends the image targets supported by #GtkSelectionData to
|
||
* the target list. All targets are added with the same @info.
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
void
|
||
gtk_target_list_add_image_targets (GtkTargetList *list,
|
||
guint info,
|
||
gboolean writable)
|
||
{
|
||
GSList *formats, *f;
|
||
gchar **mimes, **m;
|
||
GdkAtom atom;
|
||
|
||
g_return_if_fail (list != NULL);
|
||
|
||
formats = gdk_pixbuf_get_formats ();
|
||
|
||
/* Make sure png comes first */
|
||
for (f = formats; f; f = f->next)
|
||
{
|
||
GdkPixbufFormat *fmt = f->data;
|
||
gchar *name;
|
||
|
||
name = gdk_pixbuf_format_get_name (fmt);
|
||
if (strcmp (name, "png") == 0)
|
||
{
|
||
formats = g_slist_delete_link (formats, f);
|
||
formats = g_slist_prepend (formats, fmt);
|
||
|
||
g_free (name);
|
||
|
||
break;
|
||
}
|
||
|
||
g_free (name);
|
||
}
|
||
|
||
for (f = formats; f; f = f->next)
|
||
{
|
||
GdkPixbufFormat *fmt = f->data;
|
||
|
||
if (writable && !gdk_pixbuf_format_is_writable (fmt))
|
||
continue;
|
||
|
||
mimes = gdk_pixbuf_format_get_mime_types (fmt);
|
||
for (m = mimes; *m; m++)
|
||
{
|
||
atom = gdk_atom_intern (*m, FALSE);
|
||
gtk_target_list_add (list, atom, 0, info);
|
||
}
|
||
g_strfreev (mimes);
|
||
}
|
||
|
||
g_slist_free (formats);
|
||
}
|
||
|
||
/**
|
||
* gtk_target_list_add_uri_targets:
|
||
* @list: a #GtkTargetList
|
||
* @info: an ID that will be passed back to the application
|
||
*
|
||
* Appends the URI targets supported by #GtkSelectionData to
|
||
* the target list. All targets are added with the same @info.
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
void
|
||
gtk_target_list_add_uri_targets (GtkTargetList *list,
|
||
guint info)
|
||
{
|
||
g_return_if_fail (list != NULL);
|
||
|
||
init_atoms ();
|
||
|
||
gtk_target_list_add (list, text_uri_list_atom, 0, info);
|
||
}
|
||
|
||
/**
|
||
* gtk_target_list_add_table:
|
||
* @list: a #GtkTargetList
|
||
* @targets: (array length=ntargets): the table of #GtkTargetEntry
|
||
* @ntargets: number of targets in the table
|
||
*
|
||
* Prepends a table of #GtkTargetEntry to a target list.
|
||
**/
|
||
void
|
||
gtk_target_list_add_table (GtkTargetList *list,
|
||
const GtkTargetEntry *targets,
|
||
guint ntargets)
|
||
{
|
||
gint i;
|
||
|
||
for (i=ntargets-1; i >= 0; i--)
|
||
{
|
||
GtkTargetPair *pair = g_slice_new (GtkTargetPair);
|
||
pair->target = gdk_atom_intern (targets[i].target, FALSE);
|
||
pair->flags = targets[i].flags;
|
||
pair->info = targets[i].info;
|
||
|
||
list->list = g_list_prepend (list->list, pair);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_target_list_remove:
|
||
* @list: a #GtkTargetList
|
||
* @target: the interned atom representing the target
|
||
*
|
||
* Removes a target from a target list.
|
||
**/
|
||
void
|
||
gtk_target_list_remove (GtkTargetList *list,
|
||
GdkAtom target)
|
||
{
|
||
GList *tmp_list;
|
||
|
||
g_return_if_fail (list != NULL);
|
||
|
||
tmp_list = list->list;
|
||
while (tmp_list)
|
||
{
|
||
GtkTargetPair *pair = tmp_list->data;
|
||
|
||
if (pair->target == target)
|
||
{
|
||
g_slice_free (GtkTargetPair, pair);
|
||
|
||
list->list = g_list_remove_link (list->list, tmp_list);
|
||
g_list_free_1 (tmp_list);
|
||
|
||
return;
|
||
}
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_target_list_find:
|
||
* @list: a #GtkTargetList
|
||
* @target: an interned atom representing the target to search for
|
||
* @info: (out) (allow-none): a pointer to the location to store
|
||
* application info for target, or %NULL
|
||
*
|
||
* Looks up a given target in a #GtkTargetList.
|
||
*
|
||
* Returns: %TRUE if the target was found, otherwise %FALSE
|
||
**/
|
||
gboolean
|
||
gtk_target_list_find (GtkTargetList *list,
|
||
GdkAtom target,
|
||
guint *info)
|
||
{
|
||
GList *tmp_list;
|
||
|
||
g_return_val_if_fail (list != NULL, FALSE);
|
||
|
||
tmp_list = list->list;
|
||
while (tmp_list)
|
||
{
|
||
GtkTargetPair *pair = tmp_list->data;
|
||
|
||
if (pair->target == target)
|
||
{
|
||
if (info)
|
||
*info = pair->info;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* gtk_target_table_new_from_list:
|
||
* @list: a #GtkTargetList
|
||
* @n_targets: (out): return location for the number ot targets in the table
|
||
*
|
||
* This function creates an #GtkTargetEntry array that contains the
|
||
* same targets as the passed %list. The returned table is newly
|
||
* allocated and should be freed using gtk_target_table_free() when no
|
||
* longer needed.
|
||
*
|
||
* Returns: (array length=n_targets) (transfer full): the new table.
|
||
*
|
||
* Since: 2.10
|
||
**/
|
||
GtkTargetEntry *
|
||
gtk_target_table_new_from_list (GtkTargetList *list,
|
||
gint *n_targets)
|
||
{
|
||
GtkTargetEntry *targets;
|
||
GList *tmp_list;
|
||
gint i;
|
||
|
||
g_return_val_if_fail (list != NULL, NULL);
|
||
g_return_val_if_fail (n_targets != NULL, NULL);
|
||
|
||
*n_targets = g_list_length (list->list);
|
||
targets = g_new0 (GtkTargetEntry, *n_targets);
|
||
|
||
for (tmp_list = list->list, i = 0; tmp_list; tmp_list = tmp_list->next, i++)
|
||
{
|
||
GtkTargetPair *pair = tmp_list->data;
|
||
|
||
targets[i].target = gdk_atom_name (pair->target);
|
||
targets[i].flags = pair->flags;
|
||
targets[i].info = pair->info;
|
||
}
|
||
|
||
return targets;
|
||
}
|
||
|
||
/**
|
||
* gtk_target_table_free:
|
||
* @targets: (array length=n_targets): a #GtkTargetEntry array
|
||
* @n_targets: the number of entries in the array
|
||
*
|
||
* This function frees a target table as returned by
|
||
* gtk_target_table_new_from_list()
|
||
*
|
||
* Since: 2.10
|
||
**/
|
||
void
|
||
gtk_target_table_free (GtkTargetEntry *targets,
|
||
gint n_targets)
|
||
{
|
||
gint i;
|
||
|
||
g_return_if_fail (targets == NULL || n_targets > 0);
|
||
|
||
for (i = 0; i < n_targets; i++)
|
||
g_free (targets[i].target);
|
||
|
||
g_free (targets);
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_owner_set_for_display:
|
||
* @display: the #GdkDisplay where the selection is set
|
||
* @widget: (allow-none): new selection owner (a #GtkWidget), or %NULL.
|
||
* @selection: an interned atom representing the selection to claim.
|
||
* @time_: timestamp with which to claim the selection
|
||
*
|
||
* Claim ownership of a given selection for a particular widget, or,
|
||
* if @widget is %NULL, release ownership of the selection.
|
||
*
|
||
* Returns: TRUE if the operation succeeded
|
||
*
|
||
* Since: 2.2
|
||
*/
|
||
gboolean
|
||
gtk_selection_owner_set_for_display (GdkDisplay *display,
|
||
GtkWidget *widget,
|
||
GdkAtom selection,
|
||
guint32 time)
|
||
{
|
||
GList *tmp_list;
|
||
GtkWidget *old_owner;
|
||
GtkSelectionInfo *selection_info = NULL;
|
||
GdkWindow *window;
|
||
|
||
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
|
||
g_return_val_if_fail (selection != GDK_NONE, FALSE);
|
||
g_return_val_if_fail (widget == NULL || gtk_widget_get_realized (widget), FALSE);
|
||
g_return_val_if_fail (widget == NULL || gtk_widget_get_display (widget) == display, FALSE);
|
||
|
||
if (widget == NULL)
|
||
window = NULL;
|
||
else
|
||
window = gtk_widget_get_window (widget);
|
||
|
||
tmp_list = current_selections;
|
||
while (tmp_list)
|
||
{
|
||
if (((GtkSelectionInfo *)tmp_list->data)->selection == selection)
|
||
{
|
||
selection_info = tmp_list->data;
|
||
break;
|
||
}
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
if (gdk_selection_owner_set_for_display (display, window, selection, time, TRUE))
|
||
{
|
||
old_owner = NULL;
|
||
|
||
if (widget == NULL)
|
||
{
|
||
if (selection_info)
|
||
{
|
||
old_owner = selection_info->widget;
|
||
current_selections = g_list_remove_link (current_selections,
|
||
tmp_list);
|
||
g_list_free (tmp_list);
|
||
g_slice_free (GtkSelectionInfo, selection_info);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (selection_info == NULL)
|
||
{
|
||
selection_info = g_slice_new (GtkSelectionInfo);
|
||
selection_info->selection = selection;
|
||
selection_info->widget = widget;
|
||
selection_info->time = time;
|
||
selection_info->display = display;
|
||
current_selections = g_list_prepend (current_selections,
|
||
selection_info);
|
||
}
|
||
else
|
||
{
|
||
old_owner = selection_info->widget;
|
||
selection_info->widget = widget;
|
||
selection_info->time = time;
|
||
selection_info->display = display;
|
||
}
|
||
}
|
||
/* If another widget in the application lost the selection,
|
||
* send it a GDK_SELECTION_CLEAR event.
|
||
*/
|
||
if (old_owner && old_owner != widget)
|
||
{
|
||
GdkEvent *event = gdk_event_new (GDK_SELECTION_CLEAR);
|
||
|
||
event->selection.window = g_object_ref (gtk_widget_get_window (old_owner));
|
||
event->selection.selection = selection;
|
||
event->selection.time = time;
|
||
|
||
gtk_widget_event (old_owner, event);
|
||
|
||
gdk_event_free (event);
|
||
}
|
||
return TRUE;
|
||
}
|
||
else
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_owner_set:
|
||
* @widget: (allow-none): a #GtkWidget, or %NULL.
|
||
* @selection: an interned atom representing the selection to claim
|
||
* @time_: timestamp with which to claim the selection
|
||
*
|
||
* Claims ownership of a given selection for a particular widget,
|
||
* or, if @widget is %NULL, release ownership of the selection.
|
||
*
|
||
* Returns: %TRUE if the operation succeeded
|
||
**/
|
||
gboolean
|
||
gtk_selection_owner_set (GtkWidget *widget,
|
||
GdkAtom selection,
|
||
guint32 time)
|
||
{
|
||
GdkDisplay *display;
|
||
|
||
g_return_val_if_fail (widget == NULL || gtk_widget_get_realized (widget), FALSE);
|
||
g_return_val_if_fail (selection != GDK_NONE, FALSE);
|
||
|
||
if (widget)
|
||
display = gtk_widget_get_display (widget);
|
||
else
|
||
{
|
||
GTK_NOTE (MULTIHEAD,
|
||
g_warning ("gtk_selection_owner_set (NULL,...) is not multihead safe"));
|
||
|
||
display = gdk_display_get_default ();
|
||
}
|
||
|
||
return gtk_selection_owner_set_for_display (display, widget,
|
||
selection, time);
|
||
}
|
||
|
||
typedef struct _GtkSelectionTargetList GtkSelectionTargetList;
|
||
|
||
struct _GtkSelectionTargetList {
|
||
GdkAtom selection;
|
||
GtkTargetList *list;
|
||
};
|
||
|
||
static GtkTargetList *
|
||
gtk_selection_target_list_get (GtkWidget *widget,
|
||
GdkAtom selection)
|
||
{
|
||
GtkSelectionTargetList *sellist;
|
||
GList *tmp_list;
|
||
GList *lists;
|
||
|
||
lists = g_object_get_data (G_OBJECT (widget), gtk_selection_handler_key);
|
||
|
||
tmp_list = lists;
|
||
while (tmp_list)
|
||
{
|
||
sellist = tmp_list->data;
|
||
if (sellist->selection == selection)
|
||
return sellist->list;
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
sellist = g_slice_new (GtkSelectionTargetList);
|
||
sellist->selection = selection;
|
||
sellist->list = gtk_target_list_new (NULL, 0);
|
||
|
||
lists = g_list_prepend (lists, sellist);
|
||
g_object_set_data (G_OBJECT (widget), I_(gtk_selection_handler_key), lists);
|
||
|
||
return sellist->list;
|
||
}
|
||
|
||
static void
|
||
gtk_selection_target_list_remove (GtkWidget *widget)
|
||
{
|
||
GtkSelectionTargetList *sellist;
|
||
GList *tmp_list;
|
||
GList *lists;
|
||
|
||
lists = g_object_get_data (G_OBJECT (widget), gtk_selection_handler_key);
|
||
|
||
tmp_list = lists;
|
||
while (tmp_list)
|
||
{
|
||
sellist = tmp_list->data;
|
||
|
||
gtk_target_list_unref (sellist->list);
|
||
|
||
g_slice_free (GtkSelectionTargetList, sellist);
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
g_list_free (lists);
|
||
g_object_set_data (G_OBJECT (widget), I_(gtk_selection_handler_key), NULL);
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_clear_targets:
|
||
* @widget: a #GtkWidget
|
||
* @selection: an atom representing a selection
|
||
*
|
||
* Remove all targets registered for the given selection for the
|
||
* widget.
|
||
**/
|
||
void
|
||
gtk_selection_clear_targets (GtkWidget *widget,
|
||
GdkAtom selection)
|
||
{
|
||
GtkSelectionTargetList *sellist;
|
||
GList *tmp_list;
|
||
GList *lists;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
g_return_if_fail (selection != GDK_NONE);
|
||
|
||
#ifdef GDK_WINDOWING_WAYLAND
|
||
if (GDK_IS_WAYLAND_DISPLAY (gtk_widget_get_display (widget)))
|
||
gdk_wayland_selection_clear_targets (gtk_widget_get_display (widget), selection);
|
||
#endif
|
||
|
||
lists = g_object_get_data (G_OBJECT (widget), gtk_selection_handler_key);
|
||
|
||
tmp_list = lists;
|
||
while (tmp_list)
|
||
{
|
||
sellist = tmp_list->data;
|
||
if (sellist->selection == selection)
|
||
{
|
||
lists = g_list_delete_link (lists, tmp_list);
|
||
gtk_target_list_unref (sellist->list);
|
||
g_slice_free (GtkSelectionTargetList, sellist);
|
||
|
||
break;
|
||
}
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
g_object_set_data (G_OBJECT (widget), I_(gtk_selection_handler_key), lists);
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_add_target:
|
||
* @widget: a #GtkWidget
|
||
* @selection: the selection
|
||
* @target: target to add.
|
||
* @info: A unsigned integer which will be passed back to the application.
|
||
*
|
||
* Appends a specified target to the list of supported targets for a
|
||
* given widget and selection.
|
||
**/
|
||
void
|
||
gtk_selection_add_target (GtkWidget *widget,
|
||
GdkAtom selection,
|
||
GdkAtom target,
|
||
guint info)
|
||
{
|
||
GtkTargetList *list;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
g_return_if_fail (selection != GDK_NONE);
|
||
|
||
list = gtk_selection_target_list_get (widget, selection);
|
||
gtk_target_list_add (list, target, 0, info);
|
||
#ifdef GDK_WINDOWING_WAYLAND
|
||
if (GDK_IS_WAYLAND_DISPLAY (gtk_widget_get_display (widget)))
|
||
gdk_wayland_selection_add_targets (gtk_widget_get_window (widget), selection, 1, &target);
|
||
#endif
|
||
#ifdef GDK_WINDOWING_WIN32
|
||
gdk_win32_selection_add_targets (gtk_widget_get_window (widget), selection, 1, &target);
|
||
#endif
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_add_targets:
|
||
* @widget: a #GtkWidget
|
||
* @selection: the selection
|
||
* @targets: (array length=ntargets): a table of targets to add
|
||
* @ntargets: number of entries in @targets
|
||
*
|
||
* Prepends a table of targets to the list of supported targets
|
||
* for a given widget and selection.
|
||
**/
|
||
void
|
||
gtk_selection_add_targets (GtkWidget *widget,
|
||
GdkAtom selection,
|
||
const GtkTargetEntry *targets,
|
||
guint ntargets)
|
||
{
|
||
GtkTargetList *list;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
g_return_if_fail (selection != GDK_NONE);
|
||
g_return_if_fail (targets != NULL);
|
||
|
||
list = gtk_selection_target_list_get (widget, selection);
|
||
gtk_target_list_add_table (list, targets, ntargets);
|
||
|
||
#ifdef GDK_WINDOWING_WAYLAND
|
||
if (GDK_IS_WAYLAND_DISPLAY (gtk_widget_get_display (widget)))
|
||
{
|
||
GdkAtom *atoms = g_new (GdkAtom, ntargets);
|
||
guint i;
|
||
|
||
for (i = 0; i < ntargets; i++)
|
||
atoms[i] = gdk_atom_intern (targets[i].target, FALSE);
|
||
|
||
gdk_wayland_selection_add_targets (gtk_widget_get_window (widget), selection, ntargets, atoms);
|
||
g_free (atoms);
|
||
}
|
||
#endif
|
||
|
||
#ifdef GDK_WINDOWING_WIN32
|
||
{
|
||
int i;
|
||
GdkAtom *atoms = g_new (GdkAtom, ntargets);
|
||
|
||
for (i = 0; i < ntargets; ++i)
|
||
atoms[i] = gdk_atom_intern (targets[i].target, FALSE);
|
||
gdk_win32_selection_add_targets (gtk_widget_get_window (widget), selection, ntargets, atoms);
|
||
g_free (atoms);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
|
||
/**
|
||
* gtk_selection_remove_all:
|
||
* @widget: a #GtkWidget
|
||
*
|
||
* Removes all handlers and unsets ownership of all
|
||
* selections for a widget. Called when widget is being
|
||
* destroyed. This function will not generally be
|
||
* called by applications.
|
||
**/
|
||
void
|
||
gtk_selection_remove_all (GtkWidget *widget)
|
||
{
|
||
GList *tmp_list;
|
||
GList *next;
|
||
GtkSelectionInfo *selection_info;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
/* Remove pending requests/incrs for this widget */
|
||
|
||
tmp_list = current_retrievals;
|
||
while (tmp_list)
|
||
{
|
||
next = tmp_list->next;
|
||
if (((GtkRetrievalInfo *)tmp_list->data)->widget == widget)
|
||
{
|
||
current_retrievals = g_list_remove_link (current_retrievals,
|
||
tmp_list);
|
||
/* structure will be freed in timeout */
|
||
g_list_free (tmp_list);
|
||
}
|
||
tmp_list = next;
|
||
}
|
||
|
||
/* Disclaim ownership of any selections */
|
||
|
||
tmp_list = current_selections;
|
||
while (tmp_list)
|
||
{
|
||
next = tmp_list->next;
|
||
selection_info = (GtkSelectionInfo *)tmp_list->data;
|
||
|
||
if (selection_info->widget == widget)
|
||
{
|
||
gdk_selection_owner_set_for_display (selection_info->display,
|
||
NULL,
|
||
selection_info->selection,
|
||
GDK_CURRENT_TIME, FALSE);
|
||
current_selections = g_list_remove_link (current_selections,
|
||
tmp_list);
|
||
g_list_free (tmp_list);
|
||
g_slice_free (GtkSelectionInfo, selection_info);
|
||
}
|
||
|
||
tmp_list = next;
|
||
}
|
||
|
||
/* Remove all selection lists */
|
||
gtk_selection_target_list_remove (widget);
|
||
}
|
||
|
||
|
||
/**
|
||
* gtk_selection_convert:
|
||
* @widget: The widget which acts as requestor
|
||
* @selection: Which selection to get
|
||
* @target: Form of information desired (e.g., STRING)
|
||
* @time_: Time of request (usually of triggering event)
|
||
In emergency, you could use #GDK_CURRENT_TIME
|
||
*
|
||
* Requests the contents of a selection. When received,
|
||
* a “selection-received” signal will be generated.
|
||
*
|
||
* Returns: %TRUE if requested succeeded. %FALSE if we could not process
|
||
* request. (e.g., there was already a request in process for
|
||
* this widget).
|
||
**/
|
||
gboolean
|
||
gtk_selection_convert (GtkWidget *widget,
|
||
GdkAtom selection,
|
||
GdkAtom target,
|
||
guint32 time_)
|
||
{
|
||
GtkRetrievalInfo *info;
|
||
GList *tmp_list;
|
||
GdkWindow *owner_window;
|
||
GdkDisplay *display;
|
||
guint id;
|
||
|
||
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
|
||
g_return_val_if_fail (selection != GDK_NONE, FALSE);
|
||
|
||
if (initialize)
|
||
gtk_selection_init ();
|
||
|
||
if (!gtk_widget_get_realized (widget))
|
||
gtk_widget_realize (widget);
|
||
|
||
/* Check to see if there are already any retrievals in progress for
|
||
this widget. If we changed GDK to use the selection for the
|
||
window property in which to store the retrieved information, then
|
||
we could support multiple retrievals for different selections.
|
||
This might be useful for DND. */
|
||
|
||
tmp_list = current_retrievals;
|
||
while (tmp_list)
|
||
{
|
||
info = (GtkRetrievalInfo *)tmp_list->data;
|
||
if (info->widget == widget)
|
||
return FALSE;
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
info = g_slice_new (GtkRetrievalInfo);
|
||
|
||
info->widget = widget;
|
||
info->selection = selection;
|
||
info->target = target;
|
||
info->idle_time = 0;
|
||
info->buffer = NULL;
|
||
info->offset = -1;
|
||
|
||
/* Check if this process has current owner. If so, call handler
|
||
procedure directly to avoid deadlocks with INCR. */
|
||
|
||
display = gtk_widget_get_display (widget);
|
||
owner_window = gdk_selection_owner_get_for_display (display, selection);
|
||
|
||
if (owner_window != NULL)
|
||
{
|
||
GtkWidget *owner_widget;
|
||
gpointer owner_widget_ptr;
|
||
GtkSelectionData selection_data = {0};
|
||
|
||
selection_data.selection = selection;
|
||
selection_data.target = target;
|
||
selection_data.length = -1;
|
||
selection_data.display = display;
|
||
|
||
gdk_window_get_user_data (owner_window, &owner_widget_ptr);
|
||
owner_widget = owner_widget_ptr;
|
||
|
||
if (owner_widget != NULL)
|
||
{
|
||
gtk_selection_invoke_handler (owner_widget,
|
||
&selection_data,
|
||
time_);
|
||
|
||
gtk_selection_retrieval_report (info,
|
||
selection_data.type,
|
||
selection_data.format,
|
||
selection_data.data,
|
||
selection_data.length,
|
||
time_);
|
||
|
||
g_free (selection_data.data);
|
||
selection_data.data = NULL;
|
||
selection_data.length = -1;
|
||
|
||
g_slice_free (GtkRetrievalInfo, info);
|
||
return TRUE;
|
||
}
|
||
}
|
||
|
||
/* Otherwise, we need to go through X */
|
||
|
||
current_retrievals = g_list_append (current_retrievals, info);
|
||
gdk_selection_convert (gtk_widget_get_window (widget), selection, target, time_);
|
||
id = gdk_threads_add_timeout (1000,
|
||
(GSourceFunc) gtk_selection_retrieval_timeout, info);
|
||
g_source_set_name_by_id (id, "[gtk+] gtk_selection_retrieval_timeout");
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_get_selection:
|
||
* @selection_data: a pointer to a #GtkSelectionData-struct.
|
||
*
|
||
* Retrieves the selection #GdkAtom of the selection data.
|
||
*
|
||
* Returns: (transfer none): the selection #GdkAtom of the selection data.
|
||
*
|
||
* Since: 2.16
|
||
**/
|
||
GdkAtom
|
||
gtk_selection_data_get_selection (const GtkSelectionData *selection_data)
|
||
{
|
||
g_return_val_if_fail (selection_data != NULL, 0);
|
||
|
||
return selection_data->selection;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_get_target:
|
||
* @selection_data: a pointer to a #GtkSelectionData-struct.
|
||
*
|
||
* Retrieves the target of the selection.
|
||
*
|
||
* Returns: (transfer none): the target of the selection.
|
||
*
|
||
* Since: 2.14
|
||
**/
|
||
GdkAtom
|
||
gtk_selection_data_get_target (const GtkSelectionData *selection_data)
|
||
{
|
||
g_return_val_if_fail (selection_data != NULL, 0);
|
||
|
||
return selection_data->target;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_get_data_type:
|
||
* @selection_data: a pointer to a #GtkSelectionData-struct.
|
||
*
|
||
* Retrieves the data type of the selection.
|
||
*
|
||
* Returns: (transfer none): the data type of the selection.
|
||
*
|
||
* Since: 2.14
|
||
**/
|
||
GdkAtom
|
||
gtk_selection_data_get_data_type (const GtkSelectionData *selection_data)
|
||
{
|
||
g_return_val_if_fail (selection_data != NULL, 0);
|
||
|
||
return selection_data->type;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_get_format:
|
||
* @selection_data: a pointer to a #GtkSelectionData-struct.
|
||
*
|
||
* Retrieves the format of the selection.
|
||
*
|
||
* Returns: the format of the selection.
|
||
*
|
||
* Since: 2.14
|
||
**/
|
||
gint
|
||
gtk_selection_data_get_format (const GtkSelectionData *selection_data)
|
||
{
|
||
g_return_val_if_fail (selection_data != NULL, 0);
|
||
|
||
return selection_data->format;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_get_data: (skip)
|
||
* @selection_data: a pointer to a
|
||
* #GtkSelectionData-struct.
|
||
*
|
||
* Retrieves the raw data of the selection.
|
||
*
|
||
* Returns: (array) (element-type guint8): the raw data of the selection.
|
||
*
|
||
* Since: 2.14
|
||
**/
|
||
const guchar*
|
||
gtk_selection_data_get_data (const GtkSelectionData *selection_data)
|
||
{
|
||
g_return_val_if_fail (selection_data != NULL, NULL);
|
||
|
||
return selection_data->data;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_get_length:
|
||
* @selection_data: a pointer to a #GtkSelectionData-struct.
|
||
*
|
||
* Retrieves the length of the raw data of the selection.
|
||
*
|
||
* Returns: the length of the data of the selection.
|
||
*
|
||
* Since: 2.14
|
||
*/
|
||
gint
|
||
gtk_selection_data_get_length (const GtkSelectionData *selection_data)
|
||
{
|
||
g_return_val_if_fail (selection_data != NULL, -1);
|
||
|
||
return selection_data->length;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_get_data_with_length: (rename-to gtk_selection_data_get_data)
|
||
* @selection_data: a pointer to a #GtkSelectionData-struct.
|
||
* @length: (out): return location for length of the data segment
|
||
*
|
||
* Retrieves the raw data of the selection along with its length.
|
||
*
|
||
* Returns: (array length=length): the raw data of the selection
|
||
*
|
||
* Since: 3.0
|
||
*/
|
||
const guchar*
|
||
gtk_selection_data_get_data_with_length (const GtkSelectionData *selection_data,
|
||
gint *length)
|
||
{
|
||
g_return_val_if_fail (selection_data != NULL, NULL);
|
||
|
||
*length = selection_data->length;
|
||
|
||
return selection_data->data;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_get_display:
|
||
* @selection_data: a pointer to a #GtkSelectionData-struct.
|
||
*
|
||
* Retrieves the display of the selection.
|
||
*
|
||
* Returns: (transfer none): the display of the selection.
|
||
*
|
||
* Since: 2.14
|
||
**/
|
||
GdkDisplay *
|
||
gtk_selection_data_get_display (const GtkSelectionData *selection_data)
|
||
{
|
||
g_return_val_if_fail (selection_data != NULL, NULL);
|
||
|
||
return selection_data->display;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_set:
|
||
* @selection_data: a pointer to a #GtkSelectionData-struct.
|
||
* @type: the type of selection data
|
||
* @format: format (number of bits in a unit)
|
||
* @data: (array length=length): pointer to the data (will be copied)
|
||
* @length: length of the data
|
||
*
|
||
* Stores new data into a #GtkSelectionData object. Should
|
||
* only be called from a selection handler callback.
|
||
* Zero-terminates the stored data.
|
||
**/
|
||
void
|
||
gtk_selection_data_set (GtkSelectionData *selection_data,
|
||
GdkAtom type,
|
||
gint format,
|
||
const guchar *data,
|
||
gint length)
|
||
{
|
||
g_return_if_fail (selection_data != NULL);
|
||
|
||
g_free (selection_data->data);
|
||
|
||
selection_data->type = type;
|
||
selection_data->format = format;
|
||
|
||
if (data)
|
||
{
|
||
selection_data->data = g_new (guchar, length+1);
|
||
memcpy (selection_data->data, data, length);
|
||
selection_data->data[length] = 0;
|
||
}
|
||
else
|
||
{
|
||
g_return_if_fail (length <= 0);
|
||
|
||
if (length < 0)
|
||
selection_data->data = NULL;
|
||
else
|
||
selection_data->data = (guchar *) g_strdup ("");
|
||
}
|
||
|
||
selection_data->length = length;
|
||
}
|
||
|
||
static gboolean
|
||
selection_set_string (GtkSelectionData *selection_data,
|
||
const gchar *str,
|
||
gint len)
|
||
{
|
||
gchar *tmp = g_strndup (str, len);
|
||
gchar *latin1 = gdk_utf8_to_string_target (tmp);
|
||
g_free (tmp);
|
||
|
||
if (latin1)
|
||
{
|
||
gtk_selection_data_set (selection_data,
|
||
GDK_SELECTION_TYPE_STRING,
|
||
8, (guchar *) latin1, strlen (latin1));
|
||
g_free (latin1);
|
||
|
||
return TRUE;
|
||
}
|
||
else
|
||
return FALSE;
|
||
}
|
||
|
||
static gboolean
|
||
selection_set_compound_text (GtkSelectionData *selection_data,
|
||
const gchar *str,
|
||
gint len)
|
||
{
|
||
gboolean result = FALSE;
|
||
|
||
#ifdef GDK_WINDOWING_X11
|
||
gchar *tmp;
|
||
guchar *text;
|
||
GdkAtom encoding;
|
||
gint format;
|
||
gint new_length;
|
||
|
||
if (GDK_IS_X11_DISPLAY (selection_data->display))
|
||
{
|
||
tmp = g_strndup (str, len);
|
||
if (gdk_x11_display_utf8_to_compound_text (selection_data->display, tmp,
|
||
&encoding, &format, &text, &new_length))
|
||
{
|
||
gtk_selection_data_set (selection_data, encoding, format, text, new_length);
|
||
gdk_x11_free_compound_text (text);
|
||
|
||
result = TRUE;
|
||
}
|
||
g_free (tmp);
|
||
}
|
||
#endif
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Normalize \r and \n into \r\n
|
||
*/
|
||
static gchar *
|
||
normalize_to_crlf (const gchar *str,
|
||
gint len)
|
||
{
|
||
GString *result = g_string_sized_new (len);
|
||
const gchar *p = str;
|
||
const gchar *end = str + len;
|
||
|
||
while (p < end)
|
||
{
|
||
if (*p == '\n')
|
||
g_string_append_c (result, '\r');
|
||
|
||
if (*p == '\r')
|
||
{
|
||
g_string_append_c (result, *p);
|
||
p++;
|
||
if (p == end || *p != '\n')
|
||
g_string_append_c (result, '\n');
|
||
if (p == end)
|
||
break;
|
||
}
|
||
|
||
g_string_append_c (result, *p);
|
||
p++;
|
||
}
|
||
|
||
return g_string_free (result, FALSE);
|
||
}
|
||
|
||
/* Normalize \r and \r\n into \n
|
||
*/
|
||
static gchar *
|
||
normalize_to_lf (gchar *str,
|
||
gint len)
|
||
{
|
||
GString *result = g_string_sized_new (len);
|
||
const gchar *p = str;
|
||
|
||
while (1)
|
||
{
|
||
if (*p == '\r')
|
||
{
|
||
p++;
|
||
if (*p != '\n')
|
||
g_string_append_c (result, '\n');
|
||
}
|
||
|
||
if (*p == '\0')
|
||
break;
|
||
|
||
g_string_append_c (result, *p);
|
||
p++;
|
||
}
|
||
|
||
return g_string_free (result, FALSE);
|
||
}
|
||
|
||
static gboolean
|
||
selection_set_text_plain (GtkSelectionData *selection_data,
|
||
const gchar *str,
|
||
gint len)
|
||
{
|
||
const gchar *charset = NULL;
|
||
gchar *result;
|
||
GError *error = NULL;
|
||
|
||
result = normalize_to_crlf (str, len);
|
||
if (selection_data->target == text_plain_atom)
|
||
charset = "ASCII";
|
||
else if (selection_data->target == text_plain_locale_atom)
|
||
g_get_charset (&charset);
|
||
|
||
if (charset)
|
||
{
|
||
gchar *tmp = result;
|
||
result = g_convert_with_fallback (tmp, -1,
|
||
charset, "UTF-8",
|
||
NULL, NULL, NULL, &error);
|
||
g_free (tmp);
|
||
}
|
||
|
||
if (!result)
|
||
{
|
||
g_warning ("Error converting from %s to %s: %s",
|
||
"UTF-8", charset, error->message);
|
||
g_error_free (error);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
gtk_selection_data_set (selection_data,
|
||
selection_data->target,
|
||
8, (guchar *) result, strlen (result));
|
||
g_free (result);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static guchar *
|
||
selection_get_text_plain (const GtkSelectionData *selection_data)
|
||
{
|
||
const gchar *charset = NULL;
|
||
gchar *str, *result;
|
||
gsize len;
|
||
GError *error = NULL;
|
||
|
||
str = g_strdup ((const gchar *) selection_data->data);
|
||
len = selection_data->length;
|
||
|
||
if (selection_data->type == text_plain_atom)
|
||
charset = "ISO-8859-1";
|
||
else if (selection_data->type == text_plain_locale_atom)
|
||
g_get_charset (&charset);
|
||
|
||
if (charset)
|
||
{
|
||
gchar *tmp = str;
|
||
str = g_convert_with_fallback (tmp, len,
|
||
"UTF-8", charset,
|
||
NULL, NULL, &len, &error);
|
||
g_free (tmp);
|
||
|
||
if (!str)
|
||
{
|
||
g_warning ("Error converting from %s to %s: %s",
|
||
charset, "UTF-8", error->message);
|
||
g_error_free (error);
|
||
|
||
return NULL;
|
||
}
|
||
}
|
||
else if (!g_utf8_validate (str, -1, NULL))
|
||
{
|
||
g_warning ("Error converting from %s to %s: %s",
|
||
"text/plain;charset=utf-8", "UTF-8", "invalid UTF-8");
|
||
g_free (str);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
result = normalize_to_lf (str, len);
|
||
g_free (str);
|
||
|
||
return (guchar *) result;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_set_text:
|
||
* @selection_data: a #GtkSelectionData
|
||
* @str: a UTF-8 string
|
||
* @len: the length of @str, or -1 if @str is nul-terminated.
|
||
*
|
||
* Sets the contents of the selection from a UTF-8 encoded string.
|
||
* The string is converted to the form determined by
|
||
* @selection_data->target.
|
||
*
|
||
* Returns: %TRUE if the selection was successfully set,
|
||
* otherwise %FALSE.
|
||
**/
|
||
gboolean
|
||
gtk_selection_data_set_text (GtkSelectionData *selection_data,
|
||
const gchar *str,
|
||
gint len)
|
||
{
|
||
g_return_val_if_fail (selection_data != NULL, FALSE);
|
||
|
||
if (len < 0)
|
||
len = strlen (str);
|
||
|
||
init_atoms ();
|
||
|
||
if (selection_data->target == utf8_atom)
|
||
{
|
||
gtk_selection_data_set (selection_data,
|
||
utf8_atom,
|
||
8, (guchar *)str, len);
|
||
return TRUE;
|
||
}
|
||
else if (selection_data->target == GDK_TARGET_STRING)
|
||
{
|
||
return selection_set_string (selection_data, str, len);
|
||
}
|
||
else if (selection_data->target == ctext_atom ||
|
||
selection_data->target == text_atom)
|
||
{
|
||
if (selection_set_compound_text (selection_data, str, len))
|
||
return TRUE;
|
||
else if (selection_data->target == text_atom)
|
||
return selection_set_string (selection_data, str, len);
|
||
}
|
||
else if (selection_data->target == text_plain_atom ||
|
||
selection_data->target == text_plain_utf8_atom ||
|
||
selection_data->target == text_plain_locale_atom)
|
||
{
|
||
return selection_set_text_plain (selection_data, str, len);
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_get_text:
|
||
* @selection_data: a #GtkSelectionData
|
||
*
|
||
* Gets the contents of the selection data as a UTF-8 string.
|
||
*
|
||
* Returns: (type utf8) (nullable) (transfer full): if the selection data contained a
|
||
* recognized text type and it could be converted to UTF-8, a newly
|
||
* allocated string containing the converted text, otherwise %NULL.
|
||
* If the result is non-%NULL it must be freed with g_free().
|
||
**/
|
||
guchar *
|
||
gtk_selection_data_get_text (const GtkSelectionData *selection_data)
|
||
{
|
||
guchar *result = NULL;
|
||
|
||
g_return_val_if_fail (selection_data != NULL, NULL);
|
||
|
||
init_atoms ();
|
||
|
||
if (selection_data->length >= 0 &&
|
||
(selection_data->type == GDK_TARGET_STRING ||
|
||
selection_data->type == ctext_atom ||
|
||
selection_data->type == utf8_atom))
|
||
{
|
||
gchar **list;
|
||
gint i;
|
||
gint count = gdk_text_property_to_utf8_list_for_display (selection_data->display,
|
||
selection_data->type,
|
||
selection_data->format,
|
||
selection_data->data,
|
||
selection_data->length,
|
||
&list);
|
||
if (count > 0)
|
||
result = (guchar *) list[0];
|
||
|
||
for (i = 1; i < count; i++)
|
||
g_free (list[i]);
|
||
g_free (list);
|
||
}
|
||
else if (selection_data->length >= 0 &&
|
||
(selection_data->type == text_plain_atom ||
|
||
selection_data->type == text_plain_utf8_atom ||
|
||
selection_data->type == text_plain_locale_atom))
|
||
{
|
||
result = selection_get_text_plain (selection_data);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_set_pixbuf:
|
||
* @selection_data: a #GtkSelectionData
|
||
* @pixbuf: a #GdkPixbuf
|
||
*
|
||
* Sets the contents of the selection from a #GdkPixbuf
|
||
* The pixbuf is converted to the form determined by
|
||
* @selection_data->target.
|
||
*
|
||
* Returns: %TRUE if the selection was successfully set,
|
||
* otherwise %FALSE.
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
gboolean
|
||
gtk_selection_data_set_pixbuf (GtkSelectionData *selection_data,
|
||
GdkPixbuf *pixbuf)
|
||
{
|
||
GSList *formats, *f;
|
||
gchar **mimes, **m;
|
||
GdkAtom atom;
|
||
gboolean result;
|
||
gchar *str, *type;
|
||
gsize len;
|
||
|
||
g_return_val_if_fail (selection_data != NULL, FALSE);
|
||
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), FALSE);
|
||
|
||
formats = gdk_pixbuf_get_formats ();
|
||
|
||
for (f = formats; f; f = f->next)
|
||
{
|
||
GdkPixbufFormat *fmt = f->data;
|
||
|
||
mimes = gdk_pixbuf_format_get_mime_types (fmt);
|
||
for (m = mimes; *m; m++)
|
||
{
|
||
atom = gdk_atom_intern (*m, FALSE);
|
||
if (selection_data->target == atom)
|
||
{
|
||
str = NULL;
|
||
type = gdk_pixbuf_format_get_name (fmt);
|
||
result = gdk_pixbuf_save_to_buffer (pixbuf, &str, &len,
|
||
type, NULL,
|
||
((strcmp (type, "png") == 0) ?
|
||
"compression" : NULL), "2",
|
||
NULL);
|
||
if (result)
|
||
gtk_selection_data_set (selection_data,
|
||
atom, 8, (guchar *)str, len);
|
||
g_free (type);
|
||
g_free (str);
|
||
g_strfreev (mimes);
|
||
g_slist_free (formats);
|
||
|
||
return result;
|
||
}
|
||
}
|
||
|
||
g_strfreev (mimes);
|
||
}
|
||
|
||
g_slist_free (formats);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_get_pixbuf:
|
||
* @selection_data: a #GtkSelectionData
|
||
*
|
||
* Gets the contents of the selection data as a #GdkPixbuf.
|
||
*
|
||
* Returns: (nullable) (transfer full): if the selection data
|
||
* contained a recognized image type and it could be converted to a
|
||
* #GdkPixbuf, a newly allocated pixbuf is returned, otherwise
|
||
* %NULL. If the result is non-%NULL it must be freed with
|
||
* g_object_unref().
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
GdkPixbuf *
|
||
gtk_selection_data_get_pixbuf (const GtkSelectionData *selection_data)
|
||
{
|
||
GdkPixbufLoader *loader;
|
||
GdkPixbuf *result = NULL;
|
||
|
||
g_return_val_if_fail (selection_data != NULL, NULL);
|
||
|
||
if (selection_data->length > 0)
|
||
{
|
||
loader = gdk_pixbuf_loader_new ();
|
||
|
||
gdk_pixbuf_loader_write (loader,
|
||
selection_data->data,
|
||
selection_data->length,
|
||
NULL);
|
||
gdk_pixbuf_loader_close (loader, NULL);
|
||
result = gdk_pixbuf_loader_get_pixbuf (loader);
|
||
|
||
if (result)
|
||
g_object_ref (result);
|
||
|
||
g_object_unref (loader);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_set_uris:
|
||
* @selection_data: a #GtkSelectionData
|
||
* @uris: (array zero-terminated=1): a %NULL-terminated array of
|
||
* strings holding URIs
|
||
*
|
||
* Sets the contents of the selection from a list of URIs.
|
||
* The string is converted to the form determined by
|
||
* @selection_data->target.
|
||
*
|
||
* Returns: %TRUE if the selection was successfully set,
|
||
* otherwise %FALSE.
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
gboolean
|
||
gtk_selection_data_set_uris (GtkSelectionData *selection_data,
|
||
gchar **uris)
|
||
{
|
||
g_return_val_if_fail (selection_data != NULL, FALSE);
|
||
g_return_val_if_fail (uris != NULL, FALSE);
|
||
|
||
init_atoms ();
|
||
|
||
if (selection_data->target == text_uri_list_atom)
|
||
{
|
||
GString *list;
|
||
gint i;
|
||
gchar *result;
|
||
gsize length;
|
||
|
||
list = g_string_new (NULL);
|
||
for (i = 0; uris[i]; i++)
|
||
{
|
||
g_string_append (list, uris[i]);
|
||
g_string_append (list, "\r\n");
|
||
}
|
||
|
||
result = g_convert (list->str, list->len,
|
||
"ASCII", "UTF-8",
|
||
NULL, &length, NULL);
|
||
g_string_free (list, TRUE);
|
||
|
||
if (result)
|
||
{
|
||
gtk_selection_data_set (selection_data,
|
||
text_uri_list_atom,
|
||
8, (guchar *)result, length);
|
||
|
||
g_free (result);
|
||
|
||
return TRUE;
|
||
}
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_get_uris:
|
||
* @selection_data: a #GtkSelectionData
|
||
*
|
||
* Gets the contents of the selection data as array of URIs.
|
||
*
|
||
* Returns: (array zero-terminated=1) (element-type utf8) (transfer full): if
|
||
* the selection data contains a list of
|
||
* URIs, a newly allocated %NULL-terminated string array
|
||
* containing the URIs, otherwise %NULL. If the result is
|
||
* non-%NULL it must be freed with g_strfreev().
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
gchar **
|
||
gtk_selection_data_get_uris (const GtkSelectionData *selection_data)
|
||
{
|
||
gchar **result = NULL;
|
||
|
||
g_return_val_if_fail (selection_data != NULL, NULL);
|
||
|
||
init_atoms ();
|
||
|
||
if (selection_data->length >= 0 &&
|
||
selection_data->type == text_uri_list_atom)
|
||
{
|
||
gchar **list;
|
||
gint count = gdk_text_property_to_utf8_list_for_display (selection_data->display,
|
||
utf8_atom,
|
||
selection_data->format,
|
||
selection_data->data,
|
||
selection_data->length,
|
||
&list);
|
||
if (count > 0)
|
||
result = g_uri_list_extract_uris (list[0]);
|
||
|
||
g_strfreev (list);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
|
||
/**
|
||
* gtk_selection_data_get_targets:
|
||
* @selection_data: a #GtkSelectionData object
|
||
* @targets: (out) (array length=n_atoms) (transfer container):
|
||
* location to store an array of targets. The result stored
|
||
* here must be freed with g_free().
|
||
* @n_atoms: location to store number of items in @targets.
|
||
*
|
||
* Gets the contents of @selection_data as an array of targets.
|
||
* This can be used to interpret the results of getting
|
||
* the standard TARGETS target that is always supplied for
|
||
* any selection.
|
||
*
|
||
* Returns: %TRUE if @selection_data contains a valid
|
||
* array of targets, otherwise %FALSE.
|
||
**/
|
||
gboolean
|
||
gtk_selection_data_get_targets (const GtkSelectionData *selection_data,
|
||
GdkAtom **targets,
|
||
gint *n_atoms)
|
||
{
|
||
g_return_val_if_fail (selection_data != NULL, FALSE);
|
||
|
||
if (selection_data->length >= 0 &&
|
||
selection_data->format == 32 &&
|
||
selection_data->type == GDK_SELECTION_TYPE_ATOM)
|
||
{
|
||
if (targets)
|
||
*targets = g_memdup (selection_data->data, selection_data->length);
|
||
if (n_atoms)
|
||
*n_atoms = selection_data->length / sizeof (GdkAtom);
|
||
|
||
return TRUE;
|
||
}
|
||
else
|
||
{
|
||
if (targets)
|
||
*targets = NULL;
|
||
if (n_atoms)
|
||
*n_atoms = -1;
|
||
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_targets_include_text:
|
||
* @targets: (array length=n_targets): an array of #GdkAtoms
|
||
* @n_targets: the length of @targets
|
||
*
|
||
* Determines if any of the targets in @targets can be used to
|
||
* provide text.
|
||
*
|
||
* Returns: %TRUE if @targets include a suitable target for text,
|
||
* otherwise %FALSE.
|
||
*
|
||
* Since: 2.10
|
||
**/
|
||
gboolean
|
||
gtk_targets_include_text (GdkAtom *targets,
|
||
gint n_targets)
|
||
{
|
||
gint i;
|
||
gboolean result = FALSE;
|
||
|
||
g_return_val_if_fail (targets != NULL || n_targets == 0, FALSE);
|
||
|
||
/* Keep in sync with gtk_target_list_add_text_targets()
|
||
*/
|
||
|
||
init_atoms ();
|
||
|
||
for (i = 0; i < n_targets; i++)
|
||
{
|
||
if (targets[i] == utf8_atom ||
|
||
targets[i] == text_atom ||
|
||
targets[i] == GDK_TARGET_STRING ||
|
||
targets[i] == ctext_atom ||
|
||
targets[i] == text_plain_atom ||
|
||
targets[i] == text_plain_utf8_atom ||
|
||
targets[i] == text_plain_locale_atom)
|
||
{
|
||
result = TRUE;
|
||
break;
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gtk_targets_include_rich_text:
|
||
* @targets: (array length=n_targets): an array of #GdkAtoms
|
||
* @n_targets: the length of @targets
|
||
* @buffer: a #GtkTextBuffer
|
||
*
|
||
* Determines if any of the targets in @targets can be used to
|
||
* provide rich text.
|
||
*
|
||
* Returns: %TRUE if @targets include a suitable target for rich text,
|
||
* otherwise %FALSE.
|
||
*
|
||
* Since: 2.10
|
||
**/
|
||
gboolean
|
||
gtk_targets_include_rich_text (GdkAtom *targets,
|
||
gint n_targets,
|
||
GtkTextBuffer *buffer)
|
||
{
|
||
GdkAtom *rich_targets;
|
||
gint n_rich_targets;
|
||
gint i, j;
|
||
gboolean result = FALSE;
|
||
|
||
g_return_val_if_fail (targets != NULL || n_targets == 0, FALSE);
|
||
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
|
||
|
||
init_atoms ();
|
||
|
||
rich_targets = gtk_text_buffer_get_deserialize_formats (buffer,
|
||
&n_rich_targets);
|
||
|
||
for (i = 0; i < n_targets; i++)
|
||
{
|
||
for (j = 0; j < n_rich_targets; j++)
|
||
{
|
||
if (targets[i] == rich_targets[j])
|
||
{
|
||
result = TRUE;
|
||
goto done;
|
||
}
|
||
}
|
||
}
|
||
|
||
done:
|
||
g_free (rich_targets);
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_targets_include_text:
|
||
* @selection_data: a #GtkSelectionData object
|
||
*
|
||
* Given a #GtkSelectionData object holding a list of targets,
|
||
* determines if any of the targets in @targets can be used to
|
||
* provide text.
|
||
*
|
||
* Returns: %TRUE if @selection_data holds a list of targets,
|
||
* and a suitable target for text is included, otherwise %FALSE.
|
||
**/
|
||
gboolean
|
||
gtk_selection_data_targets_include_text (const GtkSelectionData *selection_data)
|
||
{
|
||
GdkAtom *targets;
|
||
gint n_targets;
|
||
gboolean result = FALSE;
|
||
|
||
g_return_val_if_fail (selection_data != NULL, FALSE);
|
||
|
||
init_atoms ();
|
||
|
||
if (gtk_selection_data_get_targets (selection_data, &targets, &n_targets))
|
||
{
|
||
result = gtk_targets_include_text (targets, n_targets);
|
||
g_free (targets);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_targets_include_rich_text:
|
||
* @selection_data: a #GtkSelectionData object
|
||
* @buffer: a #GtkTextBuffer
|
||
*
|
||
* Given a #GtkSelectionData object holding a list of targets,
|
||
* determines if any of the targets in @targets can be used to
|
||
* provide rich text.
|
||
*
|
||
* Returns: %TRUE if @selection_data holds a list of targets,
|
||
* and a suitable target for rich text is included,
|
||
* otherwise %FALSE.
|
||
*
|
||
* Since: 2.10
|
||
**/
|
||
gboolean
|
||
gtk_selection_data_targets_include_rich_text (const GtkSelectionData *selection_data,
|
||
GtkTextBuffer *buffer)
|
||
{
|
||
GdkAtom *targets;
|
||
gint n_targets;
|
||
gboolean result = FALSE;
|
||
|
||
g_return_val_if_fail (selection_data != NULL, FALSE);
|
||
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
|
||
|
||
init_atoms ();
|
||
|
||
if (gtk_selection_data_get_targets (selection_data, &targets, &n_targets))
|
||
{
|
||
result = gtk_targets_include_rich_text (targets, n_targets, buffer);
|
||
g_free (targets);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gtk_targets_include_image:
|
||
* @targets: (array length=n_targets): an array of #GdkAtoms
|
||
* @n_targets: the length of @targets
|
||
* @writable: whether to accept only targets for which GTK+ knows
|
||
* how to convert a pixbuf into the format
|
||
*
|
||
* Determines if any of the targets in @targets can be used to
|
||
* provide a #GdkPixbuf.
|
||
*
|
||
* Returns: %TRUE if @targets include a suitable target for images,
|
||
* otherwise %FALSE.
|
||
*
|
||
* Since: 2.10
|
||
**/
|
||
gboolean
|
||
gtk_targets_include_image (GdkAtom *targets,
|
||
gint n_targets,
|
||
gboolean writable)
|
||
{
|
||
GtkTargetList *list;
|
||
GList *l;
|
||
gint i;
|
||
gboolean result = FALSE;
|
||
|
||
g_return_val_if_fail (targets != NULL || n_targets == 0, FALSE);
|
||
|
||
list = gtk_target_list_new (NULL, 0);
|
||
gtk_target_list_add_image_targets (list, 0, writable);
|
||
for (i = 0; i < n_targets && !result; i++)
|
||
{
|
||
for (l = list->list; l; l = l->next)
|
||
{
|
||
GtkTargetPair *pair = (GtkTargetPair *)l->data;
|
||
if (pair->target == targets[i])
|
||
{
|
||
result = TRUE;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
gtk_target_list_unref (list);
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_targets_include_image:
|
||
* @selection_data: a #GtkSelectionData object
|
||
* @writable: whether to accept only targets for which GTK+ knows
|
||
* how to convert a pixbuf into the format
|
||
*
|
||
* Given a #GtkSelectionData object holding a list of targets,
|
||
* determines if any of the targets in @targets can be used to
|
||
* provide a #GdkPixbuf.
|
||
*
|
||
* Returns: %TRUE if @selection_data holds a list of targets,
|
||
* and a suitable target for images is included, otherwise %FALSE.
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
gboolean
|
||
gtk_selection_data_targets_include_image (const GtkSelectionData *selection_data,
|
||
gboolean writable)
|
||
{
|
||
GdkAtom *targets;
|
||
gint n_targets;
|
||
gboolean result = FALSE;
|
||
|
||
g_return_val_if_fail (selection_data != NULL, FALSE);
|
||
|
||
init_atoms ();
|
||
|
||
if (gtk_selection_data_get_targets (selection_data, &targets, &n_targets))
|
||
{
|
||
result = gtk_targets_include_image (targets, n_targets, writable);
|
||
g_free (targets);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gtk_targets_include_uri:
|
||
* @targets: (array length=n_targets): an array of #GdkAtoms
|
||
* @n_targets: the length of @targets
|
||
*
|
||
* Determines if any of the targets in @targets can be used to
|
||
* provide an uri list.
|
||
*
|
||
* Returns: %TRUE if @targets include a suitable target for uri lists,
|
||
* otherwise %FALSE.
|
||
*
|
||
* Since: 2.10
|
||
**/
|
||
gboolean
|
||
gtk_targets_include_uri (GdkAtom *targets,
|
||
gint n_targets)
|
||
{
|
||
gint i;
|
||
gboolean result = FALSE;
|
||
|
||
g_return_val_if_fail (targets != NULL || n_targets == 0, FALSE);
|
||
|
||
/* Keep in sync with gtk_target_list_add_uri_targets()
|
||
*/
|
||
|
||
init_atoms ();
|
||
|
||
for (i = 0; i < n_targets; i++)
|
||
{
|
||
if (targets[i] == text_uri_list_atom)
|
||
{
|
||
result = TRUE;
|
||
break;
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_targets_include_uri:
|
||
* @selection_data: a #GtkSelectionData object
|
||
*
|
||
* Given a #GtkSelectionData object holding a list of targets,
|
||
* determines if any of the targets in @targets can be used to
|
||
* provide a list or URIs.
|
||
*
|
||
* Returns: %TRUE if @selection_data holds a list of targets,
|
||
* and a suitable target for URI lists is included, otherwise %FALSE.
|
||
*
|
||
* Since: 2.10
|
||
**/
|
||
gboolean
|
||
gtk_selection_data_targets_include_uri (const GtkSelectionData *selection_data)
|
||
{
|
||
GdkAtom *targets;
|
||
gint n_targets;
|
||
gboolean result = FALSE;
|
||
|
||
g_return_val_if_fail (selection_data != NULL, FALSE);
|
||
|
||
init_atoms ();
|
||
|
||
if (gtk_selection_data_get_targets (selection_data, &targets, &n_targets))
|
||
{
|
||
result = gtk_targets_include_uri (targets, n_targets);
|
||
g_free (targets);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
|
||
/*************************************************************
|
||
* gtk_selection_init:
|
||
* Initialize local variables
|
||
* arguments:
|
||
*
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static void
|
||
gtk_selection_init (void)
|
||
{
|
||
gtk_selection_atoms[INCR] = gdk_atom_intern_static_string ("INCR");
|
||
gtk_selection_atoms[MULTIPLE] = gdk_atom_intern_static_string ("MULTIPLE");
|
||
gtk_selection_atoms[TIMESTAMP] = gdk_atom_intern_static_string ("TIMESTAMP");
|
||
gtk_selection_atoms[TARGETS] = gdk_atom_intern_static_string ("TARGETS");
|
||
gtk_selection_atoms[SAVE_TARGETS] = gdk_atom_intern_static_string ("SAVE_TARGETS");
|
||
|
||
initialize = FALSE;
|
||
}
|
||
|
||
/**
|
||
* _gtk_selection_clear:
|
||
* @widget: a #GtkWidget
|
||
* @event: the event
|
||
*
|
||
* The default handler for the #GtkWidget::selection-clear-event
|
||
* signal.
|
||
*
|
||
* Returns: %TRUE if the event was handled, otherwise false
|
||
**/
|
||
gboolean
|
||
_gtk_selection_clear (GtkWidget *widget,
|
||
GdkEventSelection *event)
|
||
{
|
||
/* Note that we filter clear events in gdkselection-x11.c, so
|
||
* that we only will get here if the clear event actually
|
||
* represents a change that we didn't do ourself.
|
||
*/
|
||
GList *tmp_list;
|
||
GtkSelectionInfo *selection_info = NULL;
|
||
|
||
tmp_list = current_selections;
|
||
while (tmp_list)
|
||
{
|
||
selection_info = (GtkSelectionInfo *)tmp_list->data;
|
||
|
||
if ((selection_info->selection == event->selection) &&
|
||
(selection_info->widget == widget))
|
||
break;
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
if (tmp_list)
|
||
{
|
||
current_selections = g_list_remove_link (current_selections, tmp_list);
|
||
g_list_free (tmp_list);
|
||
g_slice_free (GtkSelectionInfo, selection_info);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
/*************************************************************
|
||
* _gtk_selection_request:
|
||
* Handler for “selection_request_event”
|
||
* arguments:
|
||
* widget:
|
||
* event:
|
||
* results:
|
||
*************************************************************/
|
||
|
||
gboolean
|
||
_gtk_selection_request (GtkWidget *widget,
|
||
GdkEventSelection *event)
|
||
{
|
||
GdkDisplay *display = gtk_widget_get_display (widget);
|
||
GtkIncrInfo *info;
|
||
GList *tmp_list;
|
||
int i;
|
||
gulong selection_max_size;
|
||
|
||
if (event->requestor == NULL)
|
||
return FALSE;
|
||
|
||
if (initialize)
|
||
gtk_selection_init ();
|
||
|
||
selection_max_size = GTK_SELECTION_MAX_SIZE (display);
|
||
|
||
/* Check if we own selection */
|
||
|
||
tmp_list = current_selections;
|
||
while (tmp_list)
|
||
{
|
||
GtkSelectionInfo *selection_info = (GtkSelectionInfo *)tmp_list->data;
|
||
|
||
if ((selection_info->selection == event->selection) &&
|
||
(selection_info->widget == widget))
|
||
break;
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
if (tmp_list == NULL)
|
||
return FALSE;
|
||
|
||
info = g_slice_new (GtkIncrInfo);
|
||
|
||
g_object_ref (widget);
|
||
|
||
info->selection = event->selection;
|
||
info->num_incrs = 0;
|
||
info->requestor = g_object_ref (event->requestor);
|
||
|
||
/* Determine conversions we need to perform */
|
||
if (event->target == gtk_selection_atoms[MULTIPLE])
|
||
{
|
||
GdkAtom type;
|
||
guchar *mult_atoms;
|
||
gint format;
|
||
gint length;
|
||
|
||
mult_atoms = NULL;
|
||
|
||
gdk_error_trap_push ();
|
||
if (!gdk_property_get (info->requestor, event->property, GDK_NONE, /* AnyPropertyType */
|
||
0, selection_max_size, FALSE,
|
||
&type, &format, &length, &mult_atoms))
|
||
{
|
||
gdk_selection_send_notify_for_display (display,
|
||
event->requestor,
|
||
event->selection,
|
||
event->target,
|
||
GDK_NONE,
|
||
event->time);
|
||
g_free (mult_atoms);
|
||
g_slice_free (GtkIncrInfo, info);
|
||
gdk_error_trap_pop_ignored ();
|
||
return TRUE;
|
||
}
|
||
gdk_error_trap_pop_ignored ();
|
||
|
||
/* This is annoying; the ICCCM doesn't specify the property type
|
||
* used for the property contents, so the autoconversion for
|
||
* ATOM / ATOM_PAIR in GDK doesn't work properly.
|
||
*/
|
||
#ifdef GDK_WINDOWING_X11
|
||
if (type != GDK_SELECTION_TYPE_ATOM &&
|
||
type != gdk_atom_intern_static_string ("ATOM_PAIR"))
|
||
{
|
||
info->num_conversions = length / (2*sizeof (glong));
|
||
info->conversions = g_new (GtkIncrConversion, info->num_conversions);
|
||
|
||
for (i=0; i<info->num_conversions; i++)
|
||
{
|
||
info->conversions[i].target = gdk_x11_xatom_to_atom_for_display (display,
|
||
((glong *)mult_atoms)[2*i]);
|
||
info->conversions[i].property = gdk_x11_xatom_to_atom_for_display (display,
|
||
((glong *)mult_atoms)[2*i + 1]);
|
||
}
|
||
|
||
g_free (mult_atoms);
|
||
}
|
||
else
|
||
#endif
|
||
{
|
||
info->num_conversions = length / (2*sizeof (GdkAtom));
|
||
info->conversions = g_new (GtkIncrConversion, info->num_conversions);
|
||
|
||
for (i=0; i<info->num_conversions; i++)
|
||
{
|
||
info->conversions[i].target = ((GdkAtom *)mult_atoms)[2*i];
|
||
info->conversions[i].property = ((GdkAtom *)mult_atoms)[2*i+1];
|
||
}
|
||
|
||
g_free (mult_atoms);
|
||
}
|
||
}
|
||
else /* only a single conversion */
|
||
{
|
||
info->conversions = g_new (GtkIncrConversion, 1);
|
||
info->num_conversions = 1;
|
||
info->conversions[0].target = event->target;
|
||
info->conversions[0].property = event->property;
|
||
}
|
||
|
||
/* Loop through conversions and determine which of these are big
|
||
enough to require doing them via INCR */
|
||
for (i=0; i<info->num_conversions; i++)
|
||
{
|
||
GtkSelectionData data;
|
||
glong items;
|
||
|
||
data.selection = event->selection;
|
||
data.target = info->conversions[i].target;
|
||
data.data = NULL;
|
||
data.length = -1;
|
||
data.display = gtk_widget_get_display (widget);
|
||
|
||
#ifdef DEBUG_SELECTION
|
||
g_message ("Selection %ld, target %ld (%s) requested by 0x%x (property = %ld)",
|
||
event->selection,
|
||
info->conversions[i].target,
|
||
gdk_atom_name (info->conversions[i].target),
|
||
event->requestor, info->conversions[i].property);
|
||
#endif
|
||
|
||
gtk_selection_invoke_handler (widget, &data, event->time);
|
||
if (data.length < 0)
|
||
{
|
||
info->conversions[i].property = GDK_NONE;
|
||
continue;
|
||
}
|
||
|
||
g_return_val_if_fail ((data.format >= 8) && (data.format % 8 == 0), FALSE);
|
||
|
||
items = data.length / gtk_selection_bytes_per_item (data.format);
|
||
|
||
if (data.length > selection_max_size)
|
||
{
|
||
/* Sending via INCR */
|
||
#ifdef DEBUG_SELECTION
|
||
g_message ("Target larger (%d) than max. request size (%ld), sending incrementally\n",
|
||
data.length, selection_max_size);
|
||
#endif
|
||
|
||
info->conversions[i].offset = 0;
|
||
info->conversions[i].data = data;
|
||
info->num_incrs++;
|
||
|
||
gdk_error_trap_push ();
|
||
gdk_property_change (info->requestor,
|
||
info->conversions[i].property,
|
||
gtk_selection_atoms[INCR],
|
||
32,
|
||
GDK_PROP_MODE_REPLACE,
|
||
(guchar *)&items, 1);
|
||
gdk_error_trap_pop_ignored ();
|
||
}
|
||
else
|
||
{
|
||
info->conversions[i].offset = -1;
|
||
|
||
gdk_error_trap_push ();
|
||
gdk_property_change (info->requestor,
|
||
info->conversions[i].property,
|
||
data.type,
|
||
data.format,
|
||
GDK_PROP_MODE_REPLACE,
|
||
data.data, items);
|
||
gdk_error_trap_pop_ignored ();
|
||
|
||
g_free (data.data);
|
||
}
|
||
}
|
||
|
||
/* If we have some INCR's, we need to send the rest of the data in
|
||
a callback */
|
||
|
||
if (info->num_incrs > 0)
|
||
{
|
||
guint id;
|
||
|
||
/* FIXME: this could be dangerous if window doesn't still
|
||
exist */
|
||
|
||
#ifdef DEBUG_SELECTION
|
||
g_message ("Starting INCR...");
|
||
#endif
|
||
|
||
gdk_error_trap_push ();
|
||
gdk_window_set_events (info->requestor,
|
||
gdk_window_get_events (info->requestor) |
|
||
GDK_PROPERTY_CHANGE_MASK);
|
||
gdk_error_trap_pop_ignored ();
|
||
current_incrs = g_list_append (current_incrs, info);
|
||
id = gdk_threads_add_timeout (1000, (GSourceFunc) gtk_selection_incr_timeout, info);
|
||
g_source_set_name_by_id (id, "[gtk+] gtk_selection_incr_timeout");
|
||
}
|
||
|
||
/* If it was a MULTIPLE request, set the property to indicate which
|
||
conversions succeeded */
|
||
if (event->target == gtk_selection_atoms[MULTIPLE])
|
||
{
|
||
GdkAtom *mult_atoms = g_new (GdkAtom, 2 * info->num_conversions);
|
||
for (i = 0; i < info->num_conversions; i++)
|
||
{
|
||
mult_atoms[2*i] = info->conversions[i].target;
|
||
mult_atoms[2*i+1] = info->conversions[i].property;
|
||
}
|
||
|
||
gdk_error_trap_push ();
|
||
gdk_property_change (info->requestor, event->property,
|
||
gdk_atom_intern_static_string ("ATOM_PAIR"), 32,
|
||
GDK_PROP_MODE_REPLACE,
|
||
(guchar *)mult_atoms, 2*info->num_conversions);
|
||
gdk_error_trap_pop_ignored ();
|
||
g_free (mult_atoms);
|
||
}
|
||
|
||
if (info->num_conversions == 1 &&
|
||
info->conversions[0].property == GDK_NONE)
|
||
{
|
||
/* Reject the entire conversion */
|
||
gdk_selection_send_notify_for_display (gtk_widget_get_display (widget),
|
||
event->requestor,
|
||
event->selection,
|
||
event->target,
|
||
GDK_NONE,
|
||
event->time);
|
||
}
|
||
else
|
||
{
|
||
gdk_selection_send_notify_for_display (gtk_widget_get_display (widget),
|
||
event->requestor,
|
||
event->selection,
|
||
event->target,
|
||
event->property,
|
||
event->time);
|
||
}
|
||
|
||
if (info->num_incrs == 0)
|
||
{
|
||
g_free (info->conversions);
|
||
g_slice_free (GtkIncrInfo, info);
|
||
}
|
||
|
||
g_object_unref (widget);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/*************************************************************
|
||
* _gtk_selection_incr_event:
|
||
* Called whenever an PropertyNotify event occurs for an
|
||
* GdkWindow with user_data == NULL. These will be notifications
|
||
* that a window we are sending the selection to via the
|
||
* INCR protocol has deleted a property and is ready for
|
||
* more data.
|
||
*
|
||
* arguments:
|
||
* window: the requestor window
|
||
* event: the property event structure
|
||
*
|
||
* results:
|
||
*************************************************************/
|
||
|
||
gboolean
|
||
_gtk_selection_incr_event (GdkWindow *window,
|
||
GdkEventProperty *event)
|
||
{
|
||
GList *tmp_list;
|
||
GtkIncrInfo *info = NULL;
|
||
gint num_bytes;
|
||
guchar *buffer;
|
||
gulong selection_max_size;
|
||
|
||
int i;
|
||
|
||
if (event->state != GDK_PROPERTY_DELETE)
|
||
return FALSE;
|
||
|
||
#ifdef DEBUG_SELECTION
|
||
g_message ("PropertyDelete, property %ld", event->atom);
|
||
#endif
|
||
|
||
selection_max_size = GTK_SELECTION_MAX_SIZE (gdk_window_get_display (window));
|
||
|
||
/* Now find the appropriate ongoing INCR */
|
||
tmp_list = current_incrs;
|
||
while (tmp_list)
|
||
{
|
||
info = (GtkIncrInfo *)tmp_list->data;
|
||
if (info->requestor == event->window)
|
||
break;
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
if (tmp_list == NULL)
|
||
return FALSE;
|
||
|
||
/* Find out which target this is for */
|
||
for (i=0; i<info->num_conversions; i++)
|
||
{
|
||
if (info->conversions[i].property == event->atom &&
|
||
info->conversions[i].offset != -1)
|
||
{
|
||
int bytes_per_item;
|
||
|
||
info->idle_time = 0;
|
||
|
||
if (info->conversions[i].offset == -2) /* only the last 0-length
|
||
piece*/
|
||
{
|
||
num_bytes = 0;
|
||
buffer = NULL;
|
||
}
|
||
else
|
||
{
|
||
num_bytes = info->conversions[i].data.length -
|
||
info->conversions[i].offset;
|
||
buffer = info->conversions[i].data.data +
|
||
info->conversions[i].offset;
|
||
|
||
if (num_bytes > selection_max_size)
|
||
{
|
||
num_bytes = selection_max_size;
|
||
info->conversions[i].offset += selection_max_size;
|
||
}
|
||
else
|
||
info->conversions[i].offset = -2;
|
||
}
|
||
#ifdef DEBUG_SELECTION
|
||
g_message ("INCR: put %d bytes (offset = %d) into window 0x%lx , property %ld",
|
||
num_bytes, info->conversions[i].offset,
|
||
GDK_WINDOW_XID(info->requestor), event->atom);
|
||
#endif
|
||
|
||
bytes_per_item = gtk_selection_bytes_per_item (info->conversions[i].data.format);
|
||
gdk_error_trap_push ();
|
||
gdk_property_change (info->requestor, event->atom,
|
||
info->conversions[i].data.type,
|
||
info->conversions[i].data.format,
|
||
GDK_PROP_MODE_REPLACE,
|
||
buffer,
|
||
num_bytes / bytes_per_item);
|
||
gdk_error_trap_pop_ignored ();
|
||
|
||
if (info->conversions[i].offset == -2)
|
||
{
|
||
g_free (info->conversions[i].data.data);
|
||
info->conversions[i].data.data = NULL;
|
||
}
|
||
|
||
if (num_bytes == 0)
|
||
{
|
||
info->num_incrs--;
|
||
info->conversions[i].offset = -1;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Check if we're finished with all the targets */
|
||
|
||
if (info->num_incrs == 0)
|
||
{
|
||
current_incrs = g_list_remove_link (current_incrs, tmp_list);
|
||
g_list_free (tmp_list);
|
||
/* Let the timeout free it */
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_selection_incr_timeout:
|
||
* Timeout callback for the sending portion of the INCR
|
||
* protocol
|
||
* arguments:
|
||
* info: Information about this incr
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static gint
|
||
gtk_selection_incr_timeout (GtkIncrInfo *info)
|
||
{
|
||
GList *tmp_list;
|
||
gboolean retval;
|
||
|
||
/* Determine if retrieval has finished by checking if it still in
|
||
list of pending retrievals */
|
||
|
||
tmp_list = current_incrs;
|
||
while (tmp_list)
|
||
{
|
||
if (info == (GtkIncrInfo *)tmp_list->data)
|
||
break;
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
/* If retrieval is finished */
|
||
if (!tmp_list || info->idle_time >= IDLE_ABORT_TIME)
|
||
{
|
||
if (tmp_list && info->idle_time >= IDLE_ABORT_TIME)
|
||
{
|
||
current_incrs = g_list_remove_link (current_incrs, tmp_list);
|
||
g_list_free (tmp_list);
|
||
}
|
||
|
||
g_free (info->conversions);
|
||
/* FIXME: we should check if requestor window is still in use,
|
||
and if not, remove it? */
|
||
|
||
g_slice_free (GtkIncrInfo, info);
|
||
|
||
retval = FALSE; /* remove timeout */
|
||
}
|
||
else
|
||
{
|
||
info->idle_time++;
|
||
|
||
retval = TRUE; /* timeout will happen again */
|
||
}
|
||
|
||
return retval;
|
||
}
|
||
|
||
/*************************************************************
|
||
* _gtk_selection_notify:
|
||
* Handler for “selection-notify-event” signals on windows
|
||
* where a retrieval is currently in process. The selection
|
||
* owner has responded to our conversion request.
|
||
* arguments:
|
||
* widget: Widget getting signal
|
||
* event: Selection event structure
|
||
* info: Information about this retrieval
|
||
* results:
|
||
* was event handled?
|
||
*************************************************************/
|
||
|
||
gboolean
|
||
_gtk_selection_notify (GtkWidget *widget,
|
||
GdkEventSelection *event)
|
||
{
|
||
GList *tmp_list;
|
||
GtkRetrievalInfo *info = NULL;
|
||
GdkWindow *window;
|
||
guchar *buffer = NULL;
|
||
gint length;
|
||
GdkAtom type;
|
||
gint format;
|
||
|
||
#ifdef DEBUG_SELECTION
|
||
g_message ("Initial receipt of selection %ld, target %ld (property = %ld)",
|
||
event->selection, event->target, event->property);
|
||
#endif
|
||
|
||
window = gtk_widget_get_window (widget);
|
||
|
||
tmp_list = current_retrievals;
|
||
while (tmp_list)
|
||
{
|
||
info = (GtkRetrievalInfo *)tmp_list->data;
|
||
if (info->widget == widget && info->selection == event->selection)
|
||
break;
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
if (!tmp_list) /* no retrieval in progress */
|
||
return FALSE;
|
||
|
||
if (event->property != GDK_NONE)
|
||
length = gdk_selection_property_get (window, &buffer,
|
||
&type, &format);
|
||
else
|
||
length = 0; /* silence gcc */
|
||
|
||
if (event->property == GDK_NONE || buffer == NULL)
|
||
{
|
||
current_retrievals = g_list_remove_link (current_retrievals, tmp_list);
|
||
g_list_free (tmp_list);
|
||
/* structure will be freed in timeout */
|
||
gtk_selection_retrieval_report (info,
|
||
GDK_NONE, 0, NULL, -1, event->time);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
if (type == gtk_selection_atoms[INCR])
|
||
{
|
||
/* The remainder of the selection will come through PropertyNotify
|
||
events */
|
||
|
||
info->notify_time = event->time;
|
||
info->idle_time = 0;
|
||
info->offset = 0; /* Mark as OK to proceed */
|
||
gdk_window_set_events (window,
|
||
gdk_window_get_events (window)
|
||
| GDK_PROPERTY_CHANGE_MASK);
|
||
}
|
||
else
|
||
{
|
||
/* We don't delete the info structure - that will happen in timeout */
|
||
current_retrievals = g_list_remove_link (current_retrievals, tmp_list);
|
||
g_list_free (tmp_list);
|
||
|
||
info->offset = length;
|
||
gtk_selection_retrieval_report (info,
|
||
type, format,
|
||
buffer, length, event->time);
|
||
}
|
||
|
||
gdk_property_delete (window, event->property);
|
||
|
||
g_free (buffer);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/*************************************************************
|
||
* _gtk_selection_property_notify:
|
||
* Handler for “property-notify-event” signals on windows
|
||
* where a retrieval is currently in process. The selection
|
||
* owner has added more data.
|
||
* arguments:
|
||
* widget: Widget getting signal
|
||
* event: Property event structure
|
||
* info: Information about this retrieval
|
||
* results:
|
||
* was event handled?
|
||
*************************************************************/
|
||
|
||
gboolean
|
||
_gtk_selection_property_notify (GtkWidget *widget,
|
||
GdkEventProperty *event)
|
||
{
|
||
GList *tmp_list;
|
||
GtkRetrievalInfo *info = NULL;
|
||
GdkWindow *window;
|
||
guchar *new_buffer;
|
||
int length;
|
||
GdkAtom type;
|
||
gint format;
|
||
|
||
g_return_val_if_fail (widget != NULL, FALSE);
|
||
g_return_val_if_fail (event != NULL, FALSE);
|
||
|
||
#if defined(GDK_WINDOWING_WIN32) || defined(GDK_WINDOWING_X11)
|
||
if ((event->state != GDK_PROPERTY_NEW_VALUE) || /* property was deleted */
|
||
(event->atom != gdk_atom_intern_static_string ("GDK_SELECTION"))) /* not the right property */
|
||
#endif
|
||
return FALSE;
|
||
|
||
#ifdef DEBUG_SELECTION
|
||
g_message ("PropertyNewValue, property %ld",
|
||
event->atom);
|
||
#endif
|
||
|
||
tmp_list = current_retrievals;
|
||
while (tmp_list)
|
||
{
|
||
info = (GtkRetrievalInfo *)tmp_list->data;
|
||
if (info->widget == widget)
|
||
break;
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
if (!tmp_list) /* No retrieval in progress */
|
||
return FALSE;
|
||
|
||
if (info->offset < 0) /* We haven't got the SelectionNotify
|
||
for this retrieval yet */
|
||
return FALSE;
|
||
|
||
info->idle_time = 0;
|
||
|
||
window = gtk_widget_get_window (widget);
|
||
length = gdk_selection_property_get (window, &new_buffer,
|
||
&type, &format);
|
||
gdk_property_delete (window, event->atom);
|
||
|
||
/* We could do a lot better efficiency-wise by paying attention to
|
||
what length was sent in the initial INCR transaction, instead of
|
||
doing memory allocation at every step. But its only guaranteed to
|
||
be a _lower bound_ (pretty useless!) */
|
||
|
||
if (length == 0 || type == GDK_NONE) /* final zero length portion */
|
||
{
|
||
/* Info structure will be freed in timeout */
|
||
current_retrievals = g_list_remove_link (current_retrievals, tmp_list);
|
||
g_list_free (tmp_list);
|
||
gtk_selection_retrieval_report (info,
|
||
type, format,
|
||
(type == GDK_NONE) ? NULL : info->buffer,
|
||
(type == GDK_NONE) ? -1 : info->offset,
|
||
info->notify_time);
|
||
}
|
||
else /* append on newly arrived data */
|
||
{
|
||
if (!info->buffer)
|
||
{
|
||
#ifdef DEBUG_SELECTION
|
||
g_message ("Start - Adding %d bytes at offset 0",
|
||
length);
|
||
#endif
|
||
info->buffer = new_buffer;
|
||
info->offset = length;
|
||
}
|
||
else
|
||
{
|
||
|
||
#ifdef DEBUG_SELECTION
|
||
g_message ("Appending %d bytes at offset %d",
|
||
length,info->offset);
|
||
#endif
|
||
/* We copy length+1 bytes to preserve guaranteed null termination */
|
||
info->buffer = g_realloc (info->buffer, info->offset+length+1);
|
||
memcpy (info->buffer + info->offset, new_buffer, length+1);
|
||
info->offset += length;
|
||
g_free (new_buffer);
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_selection_retrieval_timeout:
|
||
* Timeout callback while receiving a selection.
|
||
* arguments:
|
||
* info: Information about this retrieval
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static gboolean
|
||
gtk_selection_retrieval_timeout (GtkRetrievalInfo *info)
|
||
{
|
||
GList *tmp_list;
|
||
gboolean retval;
|
||
|
||
/* Determine if retrieval has finished by checking if it still in
|
||
list of pending retrievals */
|
||
|
||
tmp_list = current_retrievals;
|
||
while (tmp_list)
|
||
{
|
||
if (info == (GtkRetrievalInfo *)tmp_list->data)
|
||
break;
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
/* If retrieval is finished */
|
||
if (!tmp_list || info->idle_time >= IDLE_ABORT_TIME)
|
||
{
|
||
if (tmp_list && info->idle_time >= IDLE_ABORT_TIME)
|
||
{
|
||
current_retrievals = g_list_remove_link (current_retrievals, tmp_list);
|
||
g_list_free (tmp_list);
|
||
gtk_selection_retrieval_report (info, GDK_NONE, 0, NULL, -1, GDK_CURRENT_TIME);
|
||
}
|
||
|
||
g_free (info->buffer);
|
||
g_slice_free (GtkRetrievalInfo, info);
|
||
|
||
retval = FALSE; /* remove timeout */
|
||
}
|
||
else
|
||
{
|
||
info->idle_time++;
|
||
|
||
retval = TRUE; /* timeout will happen again */
|
||
}
|
||
|
||
return retval;
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_selection_retrieval_report:
|
||
* Emits a “selection-received” signal.
|
||
* arguments:
|
||
* info: information about the retrieval that completed
|
||
* buffer: buffer containing data (NULL => errror)
|
||
* time: timestamp for data in buffer
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static void
|
||
gtk_selection_retrieval_report (GtkRetrievalInfo *info,
|
||
GdkAtom type, gint format,
|
||
guchar *buffer, gint length,
|
||
guint32 time)
|
||
{
|
||
GtkSelectionData data;
|
||
|
||
data.selection = info->selection;
|
||
data.target = info->target;
|
||
data.type = type;
|
||
data.format = format;
|
||
|
||
data.length = length;
|
||
data.data = buffer;
|
||
data.display = gtk_widget_get_display (info->widget);
|
||
|
||
g_signal_emit_by_name (info->widget,
|
||
"selection-received",
|
||
&data, time);
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_selection_invoke_handler:
|
||
* Finds and invokes handler for specified
|
||
* widget/selection/target combination, calls
|
||
* gtk_selection_default_handler if none exists.
|
||
*
|
||
* arguments:
|
||
* widget: selection owner
|
||
* data: selection data [INOUT]
|
||
* time: time from requeset
|
||
*
|
||
* results:
|
||
* Number of bytes written to buffer, -1 if error
|
||
*************************************************************/
|
||
|
||
static void
|
||
gtk_selection_invoke_handler (GtkWidget *widget,
|
||
GtkSelectionData *data,
|
||
guint time)
|
||
{
|
||
GtkTargetList *target_list;
|
||
guint info;
|
||
|
||
|
||
g_return_if_fail (widget != NULL);
|
||
|
||
target_list = gtk_selection_target_list_get (widget, data->selection);
|
||
if (data->target != gtk_selection_atoms[SAVE_TARGETS] &&
|
||
target_list &&
|
||
gtk_target_list_find (target_list, data->target, &info))
|
||
{
|
||
g_signal_emit_by_name (widget,
|
||
"selection-get",
|
||
data,
|
||
info, time);
|
||
}
|
||
else
|
||
gtk_selection_default_handler (widget, data);
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_selection_default_handler:
|
||
* Handles some default targets that exist for any widget
|
||
* If it can’t fit results into buffer, returns -1. This
|
||
* won’t happen in any conceivable case, since it would
|
||
* require 1000 selection targets!
|
||
*
|
||
* arguments:
|
||
* widget: selection owner
|
||
* data: selection data [INOUT]
|
||
*
|
||
*************************************************************/
|
||
|
||
static void
|
||
gtk_selection_default_handler (GtkWidget *widget,
|
||
GtkSelectionData *data)
|
||
{
|
||
if (data->target == gtk_selection_atoms[TIMESTAMP])
|
||
{
|
||
/* Time which was used to obtain selection */
|
||
GList *tmp_list;
|
||
GtkSelectionInfo *selection_info;
|
||
|
||
tmp_list = current_selections;
|
||
while (tmp_list)
|
||
{
|
||
selection_info = (GtkSelectionInfo *)tmp_list->data;
|
||
if ((selection_info->widget == widget) &&
|
||
(selection_info->selection == data->selection))
|
||
{
|
||
gulong time = selection_info->time;
|
||
|
||
gtk_selection_data_set (data,
|
||
GDK_SELECTION_TYPE_INTEGER,
|
||
32,
|
||
(guchar *)&time,
|
||
sizeof (time));
|
||
return;
|
||
}
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
data->length = -1;
|
||
}
|
||
else if (data->target == gtk_selection_atoms[TARGETS])
|
||
{
|
||
/* List of all targets supported for this widget/selection pair */
|
||
GdkAtom *p;
|
||
guint count;
|
||
GList *tmp_list;
|
||
GtkTargetList *target_list;
|
||
GtkTargetPair *pair;
|
||
|
||
target_list = gtk_selection_target_list_get (widget,
|
||
data->selection);
|
||
count = g_list_length (target_list->list) + 3;
|
||
|
||
data->type = GDK_SELECTION_TYPE_ATOM;
|
||
data->format = 32;
|
||
data->length = count * sizeof (GdkAtom);
|
||
|
||
/* selection data is always terminated by a trailing \0
|
||
*/
|
||
p = g_malloc (data->length + 1);
|
||
data->data = (guchar *)p;
|
||
data->data[data->length] = '\0';
|
||
|
||
*p++ = gtk_selection_atoms[TIMESTAMP];
|
||
*p++ = gtk_selection_atoms[TARGETS];
|
||
*p++ = gtk_selection_atoms[MULTIPLE];
|
||
|
||
tmp_list = target_list->list;
|
||
while (tmp_list)
|
||
{
|
||
pair = (GtkTargetPair *)tmp_list->data;
|
||
*p++ = pair->target;
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
}
|
||
else if (data->target == gtk_selection_atoms[SAVE_TARGETS])
|
||
{
|
||
gtk_selection_data_set (data,
|
||
gdk_atom_intern_static_string ("NULL"),
|
||
32, NULL, 0);
|
||
}
|
||
else
|
||
{
|
||
data->length = -1;
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* gtk_selection_data_copy:
|
||
* @data: a pointer to a #GtkSelectionData-struct.
|
||
*
|
||
* Makes a copy of a #GtkSelectionData-struct and its data.
|
||
*
|
||
* Returns: a pointer to a copy of @data.
|
||
**/
|
||
GtkSelectionData*
|
||
gtk_selection_data_copy (const GtkSelectionData *data)
|
||
{
|
||
GtkSelectionData *new_data;
|
||
|
||
g_return_val_if_fail (data != NULL, NULL);
|
||
|
||
new_data = g_slice_new (GtkSelectionData);
|
||
*new_data = *data;
|
||
|
||
if (data->data)
|
||
{
|
||
new_data->data = g_malloc (data->length + 1);
|
||
memcpy (new_data->data, data->data, data->length + 1);
|
||
}
|
||
|
||
return new_data;
|
||
}
|
||
|
||
/**
|
||
* gtk_selection_data_free:
|
||
* @data: a pointer to a #GtkSelectionData-struct.
|
||
*
|
||
* Frees a #GtkSelectionData-struct returned from
|
||
* gtk_selection_data_copy().
|
||
**/
|
||
void
|
||
gtk_selection_data_free (GtkSelectionData *data)
|
||
{
|
||
g_return_if_fail (data != NULL);
|
||
|
||
g_free (data->data);
|
||
|
||
g_slice_free (GtkSelectionData, data);
|
||
}
|
||
|
||
/**
|
||
* gtk_target_entry_new:
|
||
* @target: String identifier for target
|
||
* @flags: Set of flags, see #GtkTargetFlags
|
||
* @info: an ID that will be passed back to the application
|
||
*
|
||
* Makes a new #GtkTargetEntry.
|
||
*
|
||
* Returns: a pointer to a new #GtkTargetEntry.
|
||
* Free with gtk_target_entry_free()
|
||
**/
|
||
GtkTargetEntry *
|
||
gtk_target_entry_new (const char *target,
|
||
guint flags,
|
||
guint info)
|
||
{
|
||
GtkTargetEntry entry = { (char *) target, flags, info };
|
||
return gtk_target_entry_copy (&entry);
|
||
}
|
||
|
||
/**
|
||
* gtk_target_entry_copy:
|
||
* @data: a pointer to a #GtkTargetEntry
|
||
*
|
||
* Makes a copy of a #GtkTargetEntry and its data.
|
||
*
|
||
* Returns: a pointer to a copy of @data.
|
||
* Free with gtk_target_entry_free()
|
||
**/
|
||
GtkTargetEntry *
|
||
gtk_target_entry_copy (GtkTargetEntry *data)
|
||
{
|
||
GtkTargetEntry *new_data;
|
||
|
||
g_return_val_if_fail (data != NULL, NULL);
|
||
|
||
new_data = g_slice_new (GtkTargetEntry);
|
||
new_data->target = g_strdup (data->target);
|
||
new_data->flags = data->flags;
|
||
new_data->info = data->info;
|
||
|
||
return new_data;
|
||
}
|
||
|
||
/**
|
||
* gtk_target_entry_free:
|
||
* @data: a pointer to a #GtkTargetEntry.
|
||
*
|
||
* Frees a #GtkTargetEntry returned from
|
||
* gtk_target_entry_new() or gtk_target_entry_copy().
|
||
**/
|
||
void
|
||
gtk_target_entry_free (GtkTargetEntry *data)
|
||
{
|
||
g_return_if_fail (data != NULL);
|
||
|
||
g_free (data->target);
|
||
|
||
g_slice_free (GtkTargetEntry, data);
|
||
}
|
||
|
||
|
||
G_DEFINE_BOXED_TYPE (GtkSelectionData, gtk_selection_data,
|
||
gtk_selection_data_copy,
|
||
gtk_selection_data_free)
|
||
|
||
G_DEFINE_BOXED_TYPE (GtkTargetList, gtk_target_list,
|
||
gtk_target_list_ref,
|
||
gtk_target_list_unref)
|
||
|
||
G_DEFINE_BOXED_TYPE (GtkTargetEntry, gtk_target_entry,
|
||
gtk_target_entry_copy,
|
||
gtk_target_entry_free)
|
||
|
||
static int
|
||
gtk_selection_bytes_per_item (gint format)
|
||
{
|
||
switch (format)
|
||
{
|
||
case 8:
|
||
return sizeof (char);
|
||
break;
|
||
case 16:
|
||
return sizeof (short);
|
||
break;
|
||
case 32:
|
||
return sizeof (long);
|
||
break;
|
||
default:
|
||
g_assert_not_reached();
|
||
}
|
||
return 0;
|
||
}
|