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gimp/app/widgets/gimpclipboard.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "widgets-types.h"
#include "core/gimp.h"
#include "core/gimpbuffer.h"
#include "gimpclipboard.h"
#include "gimppixbuf.h"
#include "gimpselectiondata.h"
#include "gimp-intl.h"
#define GIMP_CLIPBOARD_KEY "gimp-clipboard"
typedef struct _GimpClipboard GimpClipboard;
struct _GimpClipboard
{
GSList *pixbuf_formats;
GtkTargetEntry *target_entries;
gint n_target_entries;
};
static GimpClipboard * gimp_clipboard_get (Gimp *gimp);
static void gimp_clipboard_free (GimpClipboard *gimp_clip);
static void gimp_clipboard_buffer_changed (Gimp *gimp);
static void gimp_clipboard_set_buffer (Gimp *gimp,
GimpBuffer *buffer);
static void gimp_clipboard_send_buffer (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
guint info,
Gimp *gimp);
static GdkAtom * gimp_clipboard_wait_for_targets (gint *n_targets);
static GdkAtom gimp_clipboard_wait_for_buffer (Gimp *gimp);
static GdkAtom gimp_clipboard_wait_for_svg (Gimp *gimp);
void
gimp_clipboard_init (Gimp *gimp)
{
GimpClipboard *gimp_clip;
GSList *list;
g_return_if_fail (GIMP_IS_GIMP (gimp));
gimp_clip = gimp_clipboard_get (gimp);
g_return_if_fail (gimp_clip == NULL);
gimp_clip = g_new0 (GimpClipboard, 1);
g_object_set_data_full (G_OBJECT (gimp), GIMP_CLIPBOARD_KEY,
gimp_clip, (GDestroyNotify) gimp_clipboard_free);
gimp_clipboard_set_buffer (gimp, gimp->global_buffer);
g_signal_connect_object (gimp, "buffer-changed",
G_CALLBACK (gimp_clipboard_buffer_changed),
NULL, 0);
gimp_clip->pixbuf_formats = gimp_pixbuf_get_formats ();
for (list = gimp_clip->pixbuf_formats; list; list = g_slist_next (list))
{
GdkPixbufFormat *format = list->data;
if (gdk_pixbuf_format_is_writable (format))
{
gchar **mime_types;
gchar **type;
mime_types = gdk_pixbuf_format_get_mime_types (format);
for (type = mime_types; *type; type++)
gimp_clip->n_target_entries++;
g_strfreev (mime_types);
}
}
if (gimp_clip->n_target_entries > 0)
{
gint i = 0;
gimp_clip->target_entries = g_new0 (GtkTargetEntry,
gimp_clip->n_target_entries);
for (list = gimp_clip->pixbuf_formats; list; list = g_slist_next (list))
{
GdkPixbufFormat *format = list->data;
if (gdk_pixbuf_format_is_writable (format))
{
gchar *format_name;
gchar **mime_types;
gchar **type;
format_name = gdk_pixbuf_format_get_name (format);
mime_types = gdk_pixbuf_format_get_mime_types (format);
for (type = mime_types; *type; type++)
{
const gchar *mime_type = *type;
if (gimp->be_verbose)
g_print ("GimpClipboard: writable pixbuf format: %s\n",
mime_type);
gimp_clip->target_entries[i].target = g_strdup (mime_type);
gimp_clip->target_entries[i].flags = 0;
gimp_clip->target_entries[i].info = i;
i++;
}
g_strfreev (mime_types);
g_free (format_name);
}
}
}
}
void
gimp_clipboard_exit (Gimp *gimp)
{
GtkClipboard *clipboard;
g_return_if_fail (GIMP_IS_GIMP (gimp));
clipboard = gtk_clipboard_get_for_display (gdk_display_get_default (),
GDK_SELECTION_CLIPBOARD);
if (clipboard && gtk_clipboard_get_owner (clipboard) == G_OBJECT (gimp))
gtk_clipboard_store (clipboard);
g_signal_handlers_disconnect_by_func (gimp,
G_CALLBACK (gimp_clipboard_buffer_changed),
NULL);
gimp_clipboard_set_buffer (gimp, NULL);
g_object_set_data (G_OBJECT (gimp), GIMP_CLIPBOARD_KEY, NULL);
}
/**
* gimp_clipboard_has_buffer:
* @gimp: pointer to #Gimp
*
* Tests if there's image data in the clipboard. If the global cut
* buffer of @gimp is empty, this function checks if there's image
* data in %GDK_SELECTION_CLIPBOARD. This is done in a main-loop
* similar to gtk_clipboard_wait_is_text_available(). The same caveats
* apply here.
*
* Return value: %TRUE if there's image data in the clipboard, %FALSE otherwise
**/
gboolean
gimp_clipboard_has_buffer (Gimp *gimp)
{
g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
if (gimp->global_buffer)
return TRUE;
return (gimp_clipboard_wait_for_buffer (gimp) != GDK_NONE);
}
/**
* gimp_clipboard_has_svg:
* @gimp: pointer to #Gimp
*
* Tests if there's SVG data in %GDK_SELECTION_CLIPBOARD.
* This is done in a main-loop similar to
* gtk_clipboard_wait_is_text_available(). The same caveats apply here.
*
* Return value: %TRUE if there's SVG data in the clipboard, %FALSE otherwise
**/
gboolean
gimp_clipboard_has_svg (Gimp *gimp)
{
g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
return (gimp_clipboard_wait_for_svg (gimp) != GDK_NONE);
}
/**
* gimp_clipboard_get_buffer:
* @gimp: pointer to #Gimp
*
* Retrieves either image data from %GDK_SELECTION_CLIPBOARD or from
* the global cut buffer of @gimp.
*
* The returned #GimpBuffer needs to be unref'ed when it's no longer
* needed.
*
* Return value: a reference to a #GimpBuffer or %NULL if there's no
* image data
**/
GimpBuffer *
gimp_clipboard_get_buffer (Gimp *gimp)
{
GimpBuffer *buffer = NULL;
GtkClipboard *clipboard;
GdkAtom atom;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
clipboard = gtk_clipboard_get_for_display (gdk_display_get_default (),
GDK_SELECTION_CLIPBOARD);
if (clipboard &&
gtk_clipboard_get_owner (clipboard) != G_OBJECT (gimp) &&
(atom = gimp_clipboard_wait_for_buffer (gimp)) != GDK_NONE)
{
GtkSelectionData *data;
gimp_set_busy (gimp);
data = gtk_clipboard_wait_for_contents (clipboard, atom);
if (data)
{
GdkPixbuf *pixbuf = gtk_selection_data_get_pixbuf (data);
gtk_selection_data_free (data);
if (pixbuf)
{
buffer = gimp_buffer_new_from_pixbuf (pixbuf, _("Clipboard"));
g_object_unref (pixbuf);
}
}
gimp_unset_busy (gimp);
}
if (! buffer && gimp->global_buffer)
buffer = g_object_ref (gimp->global_buffer);
return buffer;
}
/**
* gimp_clipboard_get_svg:
* @gimp: pointer to #Gimp
* @svg_length: returns the size of the SVG stream in bytes
*
* Retrieves SVG data from %GDK_SELECTION_CLIPBOARD.
*
* The returned data needs to be freed when it's no longer needed.
*
* Return value: a reference to a #GimpBuffer or %NULL if there's no
* image data
**/
gchar *
gimp_clipboard_get_svg (Gimp *gimp,
gsize *svg_length)
{
GtkClipboard *clipboard;
GdkAtom atom;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
g_return_val_if_fail (svg_length != NULL, NULL);
clipboard = gtk_clipboard_get_for_display (gdk_display_get_default (),
GDK_SELECTION_CLIPBOARD);
if (clipboard &&
gtk_clipboard_get_owner (clipboard) != G_OBJECT (gimp) &&
(atom = gimp_clipboard_wait_for_svg (gimp)) != GDK_NONE)
{
GtkSelectionData *data;
data = gtk_clipboard_wait_for_contents (clipboard, atom);
if (data)
{
const guchar *stream;
gchar *svg = NULL;
stream = gimp_selection_data_get_stream (data, svg_length);
if (stream)
svg = g_memdup (stream, *svg_length);
gtk_selection_data_free (data);
return svg;
}
}
return NULL;
}
/* private functions */
static GimpClipboard *
gimp_clipboard_get (Gimp *gimp)
{
return g_object_get_data (G_OBJECT (gimp), GIMP_CLIPBOARD_KEY);
}
static void
gimp_clipboard_free (GimpClipboard *gimp_clip)
{
gint i;
g_slist_free (gimp_clip->pixbuf_formats);
for (i = 0; i < gimp_clip->n_target_entries; i++)
g_free (gimp_clip->target_entries[i].target);
g_free (gimp_clip->target_entries);
g_free (gimp_clip);
}
static void
gimp_clipboard_buffer_changed (Gimp *gimp)
{
gimp_clipboard_set_buffer (gimp, gimp->global_buffer);
}
static void
gimp_clipboard_set_buffer (Gimp *gimp,
GimpBuffer *buffer)
{
GimpClipboard *gimp_clip = gimp_clipboard_get (gimp);
GtkClipboard *clipboard;
clipboard = gtk_clipboard_get_for_display (gdk_display_get_default (),
GDK_SELECTION_CLIPBOARD);
if (! clipboard)
return;
if (buffer)
{
gtk_clipboard_set_with_owner (clipboard,
gimp_clip->target_entries,
gimp_clip->n_target_entries,
(GtkClipboardGetFunc) gimp_clipboard_send_buffer,
(GtkClipboardClearFunc) NULL,
G_OBJECT (gimp));
/* mark the first entry (PNG) as suitable for storing */
gtk_clipboard_set_can_store (clipboard, gimp_clip->target_entries, 1);
}
else if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (gimp))
{
gtk_clipboard_clear (clipboard);
}
}
static GdkAtom *
gimp_clipboard_wait_for_targets (gint *n_targets)
{
GtkClipboard *clipboard;
clipboard = gtk_clipboard_get_for_display (gdk_display_get_default (),
GDK_SELECTION_CLIPBOARD);
if (clipboard)
{
GtkSelectionData *data;
data = gtk_clipboard_wait_for_contents (clipboard,
gdk_atom_intern ("TARGETS",
FALSE));
if (data)
{
GdkAtom *targets;
gboolean success;
success = gtk_selection_data_get_targets (data, &targets, n_targets);
gtk_selection_data_free (data);
if (success)
{
gint i;
for (i = 0; i < *n_targets; i++)
g_printerr ("offered type: %s\n", gdk_atom_name (targets[i]));
g_printerr ("\n");
return targets;
}
}
}
return NULL;
}
static GdkAtom
gimp_clipboard_wait_for_buffer (Gimp *gimp)
{
GimpClipboard *gimp_clip = gimp_clipboard_get (gimp);
GdkAtom *targets;
gint n_targets;
GdkAtom result = GDK_NONE;
targets = gimp_clipboard_wait_for_targets (&n_targets);
if (targets)
{
GSList *list;
for (list = gimp_clip->pixbuf_formats; list; list = g_slist_next (list))
{
GdkPixbufFormat *format = list->data;
gchar **mime_types;
gchar **type;
g_printerr ("checking pixbuf format '%s'\n",
gdk_pixbuf_format_get_name (format));
mime_types = gdk_pixbuf_format_get_mime_types (format);
for (type = mime_types; *type; type++)
{
gchar *mime_type = *type;
GdkAtom atom = gdk_atom_intern (mime_type, FALSE);
gint i;
g_printerr (" - checking mime type '%s'\n", mime_type);
for (i = 0; i < n_targets; i++)
{
if (targets[i] == atom)
{
result = atom;
break;
}
}
if (result != GDK_NONE)
break;
}
g_strfreev (mime_types);
if (result != GDK_NONE)
break;
}
g_free (targets);
}
return result;
}
static GdkAtom
gimp_clipboard_wait_for_svg (Gimp *gimp)
{
GdkAtom *targets;
gint n_targets;
GdkAtom result = GDK_NONE;
targets = gimp_clipboard_wait_for_targets (&n_targets);
if (targets)
{
GdkAtom svg_atom = gdk_atom_intern ("image/svg", FALSE);
GdkAtom svg_xml_atom = gdk_atom_intern ("image/svg+xml", FALSE);
gint i;
for (i = 0; i < n_targets; i++)
{
if (targets[i] == svg_atom)
{
result = svg_atom;
break;
}
else if (targets[i] == svg_xml_atom)
{
result = svg_xml_atom;
break;
}
}
g_free (targets);
}
return result;
}
static void
gimp_clipboard_send_buffer (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
guint info,
Gimp *gimp)
{
GimpClipboard *gimp_clip = gimp_clipboard_get (gimp);
GimpBuffer *buffer = gimp->global_buffer;
GdkPixbuf *pixbuf;
gimp_set_busy (gimp);
pixbuf = gimp_viewable_get_pixbuf (GIMP_VIEWABLE (buffer),
gimp_buffer_get_width (buffer),
gimp_buffer_get_height (buffer));
if (pixbuf)
{
g_printerr ("sending pixbuf data as '%s'\n",
gimp_clip->target_entries[info].target);
gtk_selection_data_set_pixbuf (selection_data, pixbuf);
}
else
{
g_warning ("%s: gimp_viewable_get_pixbuf() failed", G_STRFUNC);
}
gimp_unset_busy (gimp);
}
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