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gimp/app/display/gimpdisplayshell-dnd.c

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/* GIMP - The GNU 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "display-types.h"
#include "core/gimp.h"
#include "core/gimp-edit.h"
#include "core/gimpbuffer.h"
#include "core/gimpdrawable-edit.h"
#include "core/gimpfilloptions.h"
#include "core/gimpimage.h"
#include "core/gimpimage-new.h"
#include "core/gimpimage-undo.h"
#include "core/gimplayer.h"
#include "core/gimplayer-new.h"
#include "core/gimplayermask.h"
#include "core/gimppattern.h"
#include "core/gimpprogress.h"
#include "file/file-open.h"
#include "text/gimptext.h"
#include "text/gimptextlayer.h"
#include "vectors/gimpvectors.h"
#include "vectors/gimpvectors-import.h"
#include "widgets/gimpdnd.h"
#include "gimpdisplay.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-dnd.h"
#include "gimpdisplayshell-transform.h"
#include "gimp-log.h"
#include "gimp-intl.h"
/* local function prototypes */
static void gimp_display_shell_drop_drawable (GtkWidget *widget,
gint x,
gint y,
GimpViewable *viewable,
gpointer data);
static void gimp_display_shell_drop_vectors (GtkWidget *widget,
gint x,
gint y,
GimpViewable *viewable,
gpointer data);
static void gimp_display_shell_drop_svg (GtkWidget *widget,
gint x,
gint y,
const guchar *svg_data,
gsize svg_data_length,
gpointer data);
static void gimp_display_shell_drop_pattern (GtkWidget *widget,
gint x,
gint y,
GimpViewable *viewable,
gpointer data);
static void gimp_display_shell_drop_color (GtkWidget *widget,
gint x,
gint y,
const GimpRGB *color,
gpointer data);
static void gimp_display_shell_drop_buffer (GtkWidget *widget,
gint x,
gint y,
GimpViewable *viewable,
gpointer data);
static void gimp_display_shell_drop_uri_list (GtkWidget *widget,
gint x,
gint y,
GList *uri_list,
gpointer data);
static void gimp_display_shell_drop_component (GtkWidget *widget,
gint x,
gint y,
GimpImage *image,
GimpChannelType component,
gpointer data);
static void gimp_display_shell_drop_pixbuf (GtkWidget *widget,
gint x,
gint y,
GdkPixbuf *pixbuf,
gpointer data);
/* public functions */
void
gimp_display_shell_dnd_init (GimpDisplayShell *shell)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
gimp_dnd_viewable_dest_add (shell->canvas, GIMP_TYPE_LAYER,
gimp_display_shell_drop_drawable,
shell);
gimp_dnd_viewable_dest_add (shell->canvas, GIMP_TYPE_LAYER_MASK,
gimp_display_shell_drop_drawable,
shell);
gimp_dnd_viewable_dest_add (shell->canvas, GIMP_TYPE_CHANNEL,
gimp_display_shell_drop_drawable,
shell);
gimp_dnd_viewable_dest_add (shell->canvas, GIMP_TYPE_VECTORS,
gimp_display_shell_drop_vectors,
shell);
gimp_dnd_viewable_dest_add (shell->canvas, GIMP_TYPE_PATTERN,
gimp_display_shell_drop_pattern,
shell);
gimp_dnd_viewable_dest_add (shell->canvas, GIMP_TYPE_BUFFER,
gimp_display_shell_drop_buffer,
shell);
gimp_dnd_color_dest_add (shell->canvas,
gimp_display_shell_drop_color,
shell);
gimp_dnd_component_dest_add (shell->canvas,
gimp_display_shell_drop_component,
shell);
gimp_dnd_uri_list_dest_add (shell->canvas,
gimp_display_shell_drop_uri_list,
shell);
gimp_dnd_svg_dest_add (shell->canvas,
gimp_display_shell_drop_svg,
shell);
gimp_dnd_pixbuf_dest_add (shell->canvas,
gimp_display_shell_drop_pixbuf,
shell);
}
/* private functions */
/*
* Position the dropped item in the middle of the viewport.
*/
static void
gimp_display_shell_dnd_position_item (GimpDisplayShell *shell,
GimpImage *image,
GimpItem *item)
{
gint item_width = gimp_item_get_width (item);
gint item_height = gimp_item_get_height (item);
gint off_x, off_y;
if (item_width >= gimp_image_get_width (image) &&
item_height >= gimp_image_get_height (image))
{
off_x = (gimp_image_get_width (image) - item_width) / 2;
off_y = (gimp_image_get_height (image) - item_height) / 2;
}
else
{
gint x, y;
gint width, height;
gimp_display_shell_untransform_viewport (shell, &x, &y, &width, &height);
off_x = x + (width - item_width) / 2;
off_y = y + (height - item_height) / 2;
}
gimp_item_translate (item,
off_x - gimp_item_get_offset_x (item),
off_y - gimp_item_get_offset_y (item),
FALSE);
}
static void
gimp_display_shell_dnd_flush (GimpDisplayShell *shell,
GimpImage *image)
{
gimp_display_shell_present (shell);
gimp_image_flush (image);
gimp_context_set_display (gimp_get_user_context (shell->display->gimp),
shell->display);
}
static void
gimp_display_shell_drop_drawable (GtkWidget *widget,
gint x,
gint y,
GimpViewable *viewable,
gpointer data)
{
GimpDisplayShell *shell = GIMP_DISPLAY_SHELL (data);
GimpImage *image = gimp_display_get_image (shell->display);
GType new_type;
GimpItem *new_item;
GIMP_LOG (DND, NULL);
if (shell->display->gimp->busy)
return;
if (! image)
{
image = gimp_image_new_from_drawable (shell->display->gimp,
GIMP_DRAWABLE (viewable));
gimp_create_display (shell->display->gimp, image, GIMP_UNIT_PIXEL, 1.0,
G_OBJECT (gimp_widget_get_monitor (widget)));
g_object_unref (image);
return;
}
if (GIMP_IS_LAYER (viewable))
new_type = G_TYPE_FROM_INSTANCE (viewable);
else
new_type = GIMP_TYPE_LAYER;
new_item = gimp_item_convert (GIMP_ITEM (viewable), image, new_type);
if (new_item)
{
GimpLayer *new_layer = GIMP_LAYER (new_item);
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_EDIT_PASTE,
_("Drop New Layer"));
gimp_display_shell_dnd_position_item (shell, image, new_item);
gimp_item_set_visible (new_item, TRUE, FALSE);
gimp_item_set_linked (new_item, FALSE, FALSE);
gimp_image_add_layer (image, new_layer,
GIMP_IMAGE_ACTIVE_PARENT, -1, TRUE);
gimp_image_undo_group_end (image);
gimp_display_shell_dnd_flush (shell, image);
}
}
static void
gimp_display_shell_drop_vectors (GtkWidget *widget,
gint x,
gint y,
GimpViewable *viewable,
gpointer data)
{
GimpDisplayShell *shell = GIMP_DISPLAY_SHELL (data);
GimpImage *image = gimp_display_get_image (shell->display);
GimpItem *new_item;
GIMP_LOG (DND, NULL);
if (shell->display->gimp->busy)
return;
if (! image)
return;
new_item = gimp_item_convert (GIMP_ITEM (viewable),
image, G_TYPE_FROM_INSTANCE (viewable));
if (new_item)
{
GimpVectors *new_vectors = GIMP_VECTORS (new_item);
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_EDIT_PASTE,
_("Drop New Path"));
gimp_image_add_vectors (image, new_vectors,
GIMP_IMAGE_ACTIVE_PARENT, -1, TRUE);
gimp_image_undo_group_end (image);
gimp_display_shell_dnd_flush (shell, image);
}
}
static void
gimp_display_shell_drop_svg (GtkWidget *widget,
gint x,
gint y,
const guchar *svg_data,
gsize svg_data_len,
gpointer data)
{
GimpDisplayShell *shell = GIMP_DISPLAY_SHELL (data);
GimpImage *image = gimp_display_get_image (shell->display);
GError *error = NULL;
GIMP_LOG (DND, NULL);
if (shell->display->gimp->busy)
return;
if (! image)
return;
if (! gimp_vectors_import_buffer (image,
(const gchar *) svg_data, svg_data_len,
TRUE, FALSE,
GIMP_IMAGE_ACTIVE_PARENT, -1,
NULL, &error))
{
gimp_message_literal (shell->display->gimp, G_OBJECT (shell->display),
GIMP_MESSAGE_ERROR,
error->message);
g_clear_error (&error);
}
else
{
gimp_display_shell_dnd_flush (shell, image);
}
}
static void
gimp_display_shell_dnd_fill (GimpDisplayShell *shell,
GimpFillOptions *options,
const gchar *undo_desc)
{
GimpImage *image = gimp_display_get_image (shell->display);
GimpDrawable *drawable;
if (shell->display->gimp->busy)
return;
if (! image)
return;
drawable = gimp_image_get_active_drawable (image);
if (! drawable)
return;
if (gimp_viewable_get_children (GIMP_VIEWABLE (drawable)))
{
gimp_message_literal (shell->display->gimp, G_OBJECT (shell->display),
GIMP_MESSAGE_ERROR,
_("Cannot modify the pixels of layer groups."));
return;
}
if (gimp_item_is_content_locked (GIMP_ITEM (drawable)))
{
gimp_message_literal (shell->display->gimp, G_OBJECT (shell->display),
GIMP_MESSAGE_ERROR,
_("The active layer's pixels are locked."));
return;
}
/* FIXME: there should be a virtual method for this that the
* GimpTextLayer can override.
*/
if (gimp_fill_options_get_style (options) == GIMP_FILL_STYLE_SOLID &&
gimp_item_is_text_layer (GIMP_ITEM (drawable)))
{
GimpRGB color;
gimp_context_get_foreground (GIMP_CONTEXT (options), &color);
gimp_text_layer_set (GIMP_TEXT_LAYER (drawable), NULL,
"color", &color,
NULL);
}
else
{
gimp_drawable_edit_fill (drawable, options, undo_desc);
}
gimp_display_shell_dnd_flush (shell, image);
}
static void
gimp_display_shell_drop_pattern (GtkWidget *widget,
gint x,
gint y,
GimpViewable *viewable,
gpointer data)
{
GimpDisplayShell *shell = GIMP_DISPLAY_SHELL (data);
GimpFillOptions *options = gimp_fill_options_new (shell->display->gimp,
NULL, FALSE);
GIMP_LOG (DND, NULL);
gimp_fill_options_set_style (options, GIMP_FILL_STYLE_PATTERN);
gimp_context_set_pattern (GIMP_CONTEXT (options), GIMP_PATTERN (viewable));
gimp_display_shell_dnd_fill (shell, options,
C_("undo-type", "Drop pattern to layer"));
g_object_unref (options);
}
static void
gimp_display_shell_drop_color (GtkWidget *widget,
gint x,
gint y,
const GimpRGB *color,
gpointer data)
{
GimpDisplayShell *shell = GIMP_DISPLAY_SHELL (data);
GimpFillOptions *options = gimp_fill_options_new (shell->display->gimp,
NULL, FALSE);
GIMP_LOG (DND, NULL);
gimp_fill_options_set_style (options, GIMP_FILL_STYLE_SOLID);
gimp_context_set_foreground (GIMP_CONTEXT (options), color);
gimp_display_shell_dnd_fill (shell, options,
C_("undo-type", "Drop color to layer"));
g_object_unref (options);
}
static void
gimp_display_shell_drop_buffer (GtkWidget *widget,
gint drop_x,
gint drop_y,
GimpViewable *viewable,
gpointer data)
{
GimpDisplayShell *shell = GIMP_DISPLAY_SHELL (data);
GimpImage *image = gimp_display_get_image (shell->display);
GimpDrawable *drawable;
GimpBuffer *buffer;
GimpPasteType paste_type;
gint x, y, width, height;
GIMP_LOG (DND, NULL);
if (shell->display->gimp->busy)
return;
if (! image)
{
image = gimp_image_new_from_buffer (shell->display->gimp,
GIMP_BUFFER (viewable));
gimp_create_display (image->gimp, image, GIMP_UNIT_PIXEL, 1.0,
G_OBJECT (gimp_widget_get_monitor (widget)));
g_object_unref (image);
return;
}
paste_type = GIMP_PASTE_TYPE_FLOATING;
drawable = gimp_image_get_active_drawable (image);
if (drawable)
{
if (gimp_viewable_get_children (GIMP_VIEWABLE (drawable)))
{
gimp_message_literal (shell->display->gimp, G_OBJECT (shell->display),
GIMP_MESSAGE_INFO,
_("Pasted as new layer because the "
"target is a layer group."));
paste_type = GIMP_PASTE_TYPE_NEW_LAYER;
}
else if (gimp_item_is_content_locked (GIMP_ITEM (drawable)))
{
gimp_message_literal (shell->display->gimp, G_OBJECT (shell->display),
GIMP_MESSAGE_ERROR,
_("Pasted as new layer because the "
"target's pixels are locked."));
paste_type = GIMP_PASTE_TYPE_NEW_LAYER;
}
}
buffer = GIMP_BUFFER (viewable);
gimp_display_shell_untransform_viewport (shell, &x, &y, &width, &height);
/* FIXME: popup a menu for selecting "Paste Into" */
gimp_edit_paste (image, drawable, GIMP_OBJECT (buffer),
paste_type, x, y, width, height);
gimp_display_shell_dnd_flush (shell, image);
}
static void
gimp_display_shell_drop_uri_list (GtkWidget *widget,
gint x,
gint y,
GList *uri_list,
gpointer data)
{
GimpDisplayShell *shell = GIMP_DISPLAY_SHELL (data);
GimpImage *image;
GimpContext *context;
GList *list;
gboolean open_as_layers;
/* If the app is already being torn down, shell->display might be
* NULL here. Play it safe.
*/
if (! shell->display)
return;
image = gimp_display_get_image (shell->display);
context = gimp_get_user_context (shell->display->gimp);
GIMP_LOG (DND, NULL);
open_as_layers = (image != NULL);
if (image)
g_object_ref (image);
for (list = uri_list; list; list = g_list_next (list))
{
GFile *file = g_file_new_for_uri (list->data);
GimpPDBStatusType status;
GError *error = NULL;
gboolean warn = FALSE;
if (! shell->display)
{
/* It seems as if GIMP is being torn down for quitting. Bail out. */
g_object_unref (file);
g_clear_object (&image);
return;
}
if (open_as_layers)
{
GList *new_layers;
new_layers = file_open_layers (shell->display->gimp, context,
GIMP_PROGRESS (shell->display),
image, FALSE,
file, GIMP_RUN_INTERACTIVE, NULL,
&status, &error);
if (new_layers)
{
gint x = 0;
gint y = 0;
gint width = gimp_image_get_width (image);
gint height = gimp_image_get_height (image);
if (gimp_display_get_image (shell->display))
gimp_display_shell_untransform_viewport (shell, &x, &y,
&width, &height);
gimp_image_add_layers (image, new_layers,
GIMP_IMAGE_ACTIVE_PARENT, -1,
x, y, width, height,
_("Drop layers"));
g_list_free (new_layers);
}
else if (status != GIMP_PDB_CANCEL && status != GIMP_PDB_SUCCESS)
{
warn = TRUE;
}
}
else if (gimp_display_get_image (shell->display))
{
/* open any subsequent images in a new display */
GimpImage *new_image;
new_image = file_open_with_display (shell->display->gimp, context,
NULL,
file, FALSE,
G_OBJECT (gimp_widget_get_monitor (widget)),
&status, &error);
if (! new_image && status != GIMP_PDB_CANCEL && status != GIMP_PDB_SUCCESS)
warn = TRUE;
}
else
{
/* open the first image in the empty display */
image = file_open_with_display (shell->display->gimp, context,
GIMP_PROGRESS (shell->display),
file, FALSE,
G_OBJECT (gimp_widget_get_monitor (widget)),
&status, &error);
if (image)
{
g_object_ref (image);
}
else if (status != GIMP_PDB_CANCEL && status != GIMP_PDB_SUCCESS)
{
warn = TRUE;
}
}
/* Something above might have run a few rounds of the main loop. Check
* that shell->display is still there, otherwise ignore this as the app
* is being torn down for quitting.
*/
if (warn && shell->display)
{
gimp_message (shell->display->gimp, G_OBJECT (shell->display),
GIMP_MESSAGE_ERROR,
_("Opening '%s' failed:\n\n%s"),
gimp_file_get_utf8_name (file), error->message);
g_clear_error (&error);
}
g_object_unref (file);
}
if (image)
gimp_display_shell_dnd_flush (shell, image);
g_clear_object (&image);
}
static void
gimp_display_shell_drop_component (GtkWidget *widget,
gint x,
gint y,
GimpImage *image,
GimpChannelType component,
gpointer data)
{
GimpDisplayShell *shell = GIMP_DISPLAY_SHELL (data);
GimpImage *dest_image = gimp_display_get_image (shell->display);
GimpChannel *channel;
GimpItem *new_item;
const gchar *desc;
GIMP_LOG (DND, NULL);
if (shell->display->gimp->busy)
return;
if (! dest_image)
{
dest_image = gimp_image_new_from_component (image->gimp,
image, component);
gimp_create_display (dest_image->gimp, dest_image, GIMP_UNIT_PIXEL, 1.0,
G_OBJECT (gimp_widget_get_monitor (widget)));
g_object_unref (dest_image);
return;
}
channel = gimp_channel_new_from_component (image, component, NULL, NULL);
new_item = gimp_item_convert (GIMP_ITEM (channel),
dest_image, GIMP_TYPE_LAYER);
g_object_unref (channel);
if (new_item)
{
GimpLayer *new_layer = GIMP_LAYER (new_item);
gimp_enum_get_value (GIMP_TYPE_CHANNEL_TYPE, component,
NULL, NULL, &desc, NULL);
gimp_object_take_name (GIMP_OBJECT (new_layer),
g_strdup_printf (_("%s Channel Copy"), desc));
gimp_image_undo_group_start (dest_image, GIMP_UNDO_GROUP_EDIT_PASTE,
_("Drop New Layer"));
gimp_display_shell_dnd_position_item (shell, image, new_item);
gimp_image_add_layer (dest_image, new_layer,
GIMP_IMAGE_ACTIVE_PARENT, -1, TRUE);
gimp_image_undo_group_end (dest_image);
gimp_display_shell_dnd_flush (shell, dest_image);
}
}
static void
gimp_display_shell_drop_pixbuf (GtkWidget *widget,
gint x,
gint y,
GdkPixbuf *pixbuf,
gpointer data)
{
GimpDisplayShell *shell = GIMP_DISPLAY_SHELL (data);
GimpImage *image = gimp_display_get_image (shell->display);
GimpLayer *new_layer;
gboolean has_alpha = FALSE;
GIMP_LOG (DND, NULL);
if (shell->display->gimp->busy)
return;
if (! image)
{
image = gimp_image_new_from_pixbuf (shell->display->gimp, pixbuf,
_("Dropped Buffer"));
gimp_create_display (image->gimp, image, GIMP_UNIT_PIXEL, 1.0,
G_OBJECT (gimp_widget_get_monitor (widget)));
g_object_unref (image);
return;
}
if (gdk_pixbuf_get_n_channels (pixbuf) == 2 ||
gdk_pixbuf_get_n_channels (pixbuf) == 4)
{
has_alpha = TRUE;
}
new_layer =
gimp_layer_new_from_pixbuf (pixbuf, image,
gimp_image_get_layer_format (image, has_alpha),
_("Dropped Buffer"),
GIMP_OPACITY_OPAQUE,
gimp_image_get_default_new_layer_mode (image));
if (new_layer)
{
GimpItem *new_item = GIMP_ITEM (new_layer);
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_EDIT_PASTE,
_("Drop New Layer"));
gimp_display_shell_dnd_position_item (shell, image, new_item);
gimp_image_add_layer (image, new_layer,
GIMP_IMAGE_ACTIVE_PARENT, -1, TRUE);
gimp_image_undo_group_end (image);
gimp_display_shell_dnd_flush (shell, image);
}
}
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