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PIKApp/app/widgets/pikaselectiondata.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995-1997 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 "libpikacolor/pikacolor.h"
#include "libpikaconfig/pikaconfig.h"
#include "widgets-types.h"
#include "core/pika.h"
#include "core/pika-utils.h"
#include "core/pikabrush.h"
#include "core/pikacontainer.h"
#include "core/pikacurve.h"
#include "core/pikadatafactory.h"
#include "core/pikagradient.h"
#include "core/pikaimage.h"
#include "core/pikaimagefile.h"
#include "core/pikaitem.h"
#include "core/pikapalette.h"
#include "core/pikapattern.h"
#include "core/pikatoolinfo.h"
#include "text/pikafont.h"
#include "xcf/xcf.h"
#include "pikaselectiondata.h"
#include "pika-log.h"
#include "pika-intl.h"
/* local function prototypes */
static const gchar * pika_selection_data_get_name (GtkSelectionData *selection,
const gchar *strfunc);
static PikaObject * pika_selection_data_get_object (GtkSelectionData *selection,
PikaContainer *container,
PikaObject *additional);
static gchar * pika_unescape_uri_string (const char *escaped,
int len,
const char *illegal_escaped_characters,
gboolean ascii_must_not_be_escaped);
/* public functions */
void
pika_selection_data_set_uri_list (GtkSelectionData *selection,
GList *uri_list)
{
GList *list;
gchar *vals = NULL;
g_return_if_fail (selection != NULL);
g_return_if_fail (uri_list != NULL);
for (list = uri_list; list; list = g_list_next (list))
{
if (vals)
{
gchar *tmp = g_strconcat (vals,
list->data,
list->next ? "\n" : NULL,
NULL);
g_free (vals);
vals = tmp;
}
else
{
vals = g_strconcat (list->data,
list->next ? "\n" : NULL,
NULL);
}
}
gtk_selection_data_set (selection,
gtk_selection_data_get_target (selection),
8, (guchar *) vals, strlen (vals));
g_free (vals);
}
GList *
pika_selection_data_get_uri_list (GtkSelectionData *selection)
{
GList *crap_list = NULL;
GList *uri_list = NULL;
GList *list;
gint length;
const gchar *data;
const gchar *buffer;
g_return_val_if_fail (selection != NULL, NULL);
length = gtk_selection_data_get_length (selection);
if (gtk_selection_data_get_format (selection) != 8 || length < 1)
{
g_warning ("Received invalid file data!");
return NULL;
}
data = buffer = (const gchar *) gtk_selection_data_get_data (selection);
PIKA_LOG (DND, "raw buffer >>%s<<", buffer);
{
gchar name_buffer[1024];
while (*buffer && (buffer - data < length))
{
gchar *name = name_buffer;
gint len = 0;
while (len < sizeof (name_buffer) && *buffer && *buffer != '\n')
{
*name++ = *buffer++;
len++;
}
if (len == 0)
break;
if (*(name - 1) == 0xd) /* gmc uses RETURN+NEWLINE as delimiter */
len--;
if (len > 2)
crap_list = g_list_prepend (crap_list, g_strndup (name_buffer, len));
if (*buffer)
buffer++;
}
}
if (! crap_list)
return NULL;
/* do various checks because file drag sources send all kinds of
* arbitrary crap...
*/
for (list = crap_list; list; list = g_list_next (list))
{
const gchar *dnd_crap = list->data;
gchar *filename;
gchar *hostname;
gchar *uri = NULL;
GError *error = NULL;
PIKA_LOG (DND, "trying to convert \"%s\" to an uri", dnd_crap);
filename = g_filename_from_uri (dnd_crap, &hostname, NULL);
if (filename)
{
/* if we got a correctly encoded "file:" uri...
*
* (for GLib < 2.4.4, this is escaped UTF-8,
* for GLib > 2.4.4, this is escaped local filename encoding)
*/
uri = g_filename_to_uri (filename, hostname, NULL);
g_free (hostname);
g_free (filename);
}
else if (g_file_test (dnd_crap, G_FILE_TEST_EXISTS))
{
/* ...else if we got a valid local filename... */
uri = g_filename_to_uri (dnd_crap, NULL, NULL);
}
else
{
/* ...otherwise do evil things... */
const gchar *start = dnd_crap;
if (g_str_has_prefix (dnd_crap, "file://"))
{
start += strlen ("file://");
}
else if (g_str_has_prefix (dnd_crap, "file:"))
{
start += strlen ("file:");
}
if (start != dnd_crap)
{
/* try if we got a "file:" uri in the wrong encoding...
*
* (for GLib < 2.4.4, this is escaped local filename encoding,
* for GLib > 2.4.4, this is escaped UTF-8)
*/
gchar *unescaped_filename;
if (strstr (dnd_crap, "%"))
{
gchar *local_filename;
unescaped_filename = pika_unescape_uri_string (start, -1,
"/", FALSE);
/* check if we got a drop from an application that
* encodes file: URIs as UTF-8 (apps linked against
* GLib < 2.4.4)
*/
local_filename = g_filename_from_utf8 (unescaped_filename,
-1, NULL, NULL,
NULL);
if (local_filename)
{
g_free (unescaped_filename);
unescaped_filename = local_filename;
}
}
else
{
unescaped_filename = g_strdup (start);
}
uri = g_filename_to_uri (unescaped_filename, NULL, &error);
if (! uri)
{
gchar *escaped_filename = g_strescape (unescaped_filename,
NULL);
g_message (_("The filename '%s' couldn't be converted to a "
"valid URI:\n\n%s"),
escaped_filename,
error->message ?
error->message : _("Invalid UTF-8"));
g_free (escaped_filename);
g_clear_error (&error);
g_free (unescaped_filename);
continue;
}
g_free (unescaped_filename);
}
else
{
/* otherwise try the crap passed anyway, in case it's
* a "http:" or whatever uri a plug-in might handle
*/
uri = g_strdup (dnd_crap);
}
}
uri_list = g_list_prepend (uri_list, uri);
}
g_list_free_full (crap_list, (GDestroyNotify) g_free);
return uri_list;
}
void
pika_selection_data_set_color (GtkSelectionData *selection,
const PikaRGB *color)
{
guint16 vals[4];
guchar r, g, b, a;
g_return_if_fail (selection != NULL);
g_return_if_fail (color != NULL);
pika_rgba_get_uchar (color, &r, &g, &b, &a);
vals[0] = r + (r << 8);
vals[1] = g + (g << 8);
vals[2] = b + (b << 8);
vals[3] = a + (a << 8);
gtk_selection_data_set (selection,
gtk_selection_data_get_target (selection),
16, (const guchar *) vals, 8);
}
gboolean
pika_selection_data_get_color (GtkSelectionData *selection,
PikaRGB *color)
{
const guint16 *color_vals;
g_return_val_if_fail (selection != NULL, FALSE);
g_return_val_if_fail (color != NULL, FALSE);
if (gtk_selection_data_get_format (selection) != 16 ||
gtk_selection_data_get_length (selection) != 8)
{
g_warning ("Received invalid color data!");
return FALSE;
}
color_vals = (const guint16 *) gtk_selection_data_get_data (selection);
pika_rgba_set_uchar (color,
(guchar) (color_vals[0] >> 8),
(guchar) (color_vals[1] >> 8),
(guchar) (color_vals[2] >> 8),
(guchar) (color_vals[3] >> 8));
return TRUE;
}
void
pika_selection_data_set_xcf (GtkSelectionData *selection,
PikaImage *image)
{
GMemoryOutputStream *output;
g_return_if_fail (selection != NULL);
g_return_if_fail (PIKA_IS_IMAGE (image));
output = G_MEMORY_OUTPUT_STREAM (g_memory_output_stream_new_resizable ());
xcf_save_stream (image->pika, image, G_OUTPUT_STREAM (output), NULL,
NULL, NULL);
gtk_selection_data_set (selection,
gtk_selection_data_get_target (selection),
8,
g_memory_output_stream_get_data (output),
g_memory_output_stream_get_data_size (output));
g_object_unref (output);
}
PikaImage *
pika_selection_data_get_xcf (GtkSelectionData *selection,
Pika *pika)
{
GInputStream *input;
PikaImage *image;
gsize length;
const guchar *data;
GError *error = NULL;
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
length = gtk_selection_data_get_length (selection);
if (gtk_selection_data_get_format (selection) != 8 || length < 1)
{
g_warning ("Received invalid data stream!");
return NULL;
}
data = gtk_selection_data_get_data (selection);
input = g_memory_input_stream_new_from_data (data, length, NULL);
image = xcf_load_stream (pika, input, NULL, NULL, &error);
if (image)
{
/* don't keep clipboard images in the image list */
pika_container_remove (pika->images, PIKA_OBJECT (image));
}
else
{
g_warning ("Received invalid XCF data: %s", error->message);
g_clear_error (&error);
}
g_object_unref (input);
return image;
}
void
pika_selection_data_set_stream (GtkSelectionData *selection,
const guchar *stream,
gsize stream_length)
{
g_return_if_fail (selection != NULL);
g_return_if_fail (stream != NULL);
g_return_if_fail (stream_length > 0);
gtk_selection_data_set (selection,
gtk_selection_data_get_target (selection),
8, (guchar *) stream, stream_length);
}
const guchar *
pika_selection_data_get_stream (GtkSelectionData *selection,
gsize *stream_length)
{
gint length;
g_return_val_if_fail (selection != NULL, NULL);
g_return_val_if_fail (stream_length != NULL, NULL);
length = gtk_selection_data_get_length (selection);
if (gtk_selection_data_get_format (selection) != 8 || length < 1)
{
g_warning ("Received invalid data stream!");
return NULL;
}
*stream_length = length;
return (const guchar *) gtk_selection_data_get_data (selection);
}
void
pika_selection_data_set_curve (GtkSelectionData *selection,
PikaCurve *curve)
{
gchar *str;
g_return_if_fail (selection != NULL);
g_return_if_fail (PIKA_IS_CURVE (curve));
str = pika_config_serialize_to_string (PIKA_CONFIG (curve), NULL);
gtk_selection_data_set (selection,
gtk_selection_data_get_target (selection),
8, (guchar *) str, strlen (str));
g_free (str);
}
PikaCurve *
pika_selection_data_get_curve (GtkSelectionData *selection)
{
PikaCurve *curve;
gint length;
GError *error = NULL;
g_return_val_if_fail (selection != NULL, NULL);
length = gtk_selection_data_get_length (selection);
if (gtk_selection_data_get_format (selection) != 8 || length < 1)
{
g_warning ("Received invalid curve data!");
return NULL;
}
curve = PIKA_CURVE (pika_curve_new ("pasted curve"));
if (! pika_config_deserialize_string (PIKA_CONFIG (curve),
(const gchar *)
gtk_selection_data_get_data (selection),
length,
NULL,
&error))
{
g_warning ("Received invalid curve data: %s", error->message);
g_clear_error (&error);
g_object_unref (curve);
return NULL;
}
return curve;
}
void
pika_selection_data_set_image (GtkSelectionData *selection,
PikaImage *image)
{
gchar *str;
g_return_if_fail (selection != NULL);
g_return_if_fail (PIKA_IS_IMAGE (image));
str = g_strdup_printf ("%d:%d", pika_get_pid (), pika_image_get_id (image));
gtk_selection_data_set (selection,
gtk_selection_data_get_target (selection),
8, (guchar *) str, strlen (str));
g_free (str);
}
PikaImage *
pika_selection_data_get_image (GtkSelectionData *selection,
Pika *pika)
{
const gchar *str;
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
str = pika_selection_data_get_name (selection, G_STRFUNC);
if (str)
{
gint pid;
gint ID;
if (sscanf (str, "%i:%i", &pid, &ID) == 2 &&
pid == pika_get_pid ())
{
return pika_image_get_by_id (pika, ID);
}
}
return NULL;
}
void
pika_selection_data_set_component (GtkSelectionData *selection,
PikaImage *image,
PikaChannelType channel)
{
gchar *str;
g_return_if_fail (selection != NULL);
g_return_if_fail (PIKA_IS_IMAGE (image));
str = g_strdup_printf ("%d:%d:%d", pika_get_pid (), pika_image_get_id (image),
(gint) channel);
gtk_selection_data_set (selection,
gtk_selection_data_get_target (selection),
8, (guchar *) str, strlen (str));
g_free (str);
}
PikaImage *
pika_selection_data_get_component (GtkSelectionData *selection,
Pika *pika,
PikaChannelType *channel)
{
const gchar *str;
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
if (channel)
*channel = 0;
str = pika_selection_data_get_name (selection, G_STRFUNC);
if (str)
{
gint pid;
gint ID;
gint ch;
if (sscanf (str, "%i:%i:%i", &pid, &ID, &ch) == 3 &&
pid == pika_get_pid ())
{
PikaImage *image = pika_image_get_by_id (pika, ID);
if (image && channel)
*channel = ch;
return image;
}
}
return NULL;
}
void
pika_selection_data_set_item (GtkSelectionData *selection,
PikaItem *item)
{
gchar *str;
g_return_if_fail (selection != NULL);
g_return_if_fail (PIKA_IS_ITEM (item));
str = g_strdup_printf ("%d:%d", pika_get_pid (), pika_item_get_id (item));
gtk_selection_data_set (selection,
gtk_selection_data_get_target (selection),
8, (guchar *) str, strlen (str));
g_free (str);
}
PikaItem *
pika_selection_data_get_item (GtkSelectionData *selection,
Pika *pika)
{
const gchar *str;
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
str = pika_selection_data_get_name (selection, G_STRFUNC);
if (str)
{
gint pid;
gint ID;
if (sscanf (str, "%i:%i", &pid, &ID) == 2 &&
pid == pika_get_pid ())
{
return pika_item_get_by_id (pika, ID);
}
}
return NULL;
}
void
pika_selection_data_set_item_list (GtkSelectionData *selection,
GList *items)
{
GString *str;
GList *iter;
g_return_if_fail (selection != NULL);
g_return_if_fail (items);
for (iter = items; iter; iter = iter->next)
g_return_if_fail (PIKA_IS_ITEM (iter->data));
str = g_string_new (NULL);
g_string_printf (str, "%d", pika_get_pid ());
for (iter = items; iter; iter = iter->next)
g_string_append_printf (str, ":%d", pika_item_get_id (iter->data));
gtk_selection_data_set (selection,
gtk_selection_data_get_target (selection),
8, (guchar *) str->str, str->len);
g_string_free (str, TRUE);
}
GList *
pika_selection_data_get_item_list (GtkSelectionData *selection,
Pika *pika)
{
const gchar *str;
GList *items = NULL;
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
str = pika_selection_data_get_name (selection, G_STRFUNC);
if (str)
{
gchar **tokens;
gint64 pid;
tokens = g_strsplit (str, ":", -1);
g_return_val_if_fail (tokens[0] != NULL && tokens[1] != NULL, NULL);
pid = g_ascii_strtoll (tokens[0], NULL, 10);
if (pid == pika_get_pid ())
{
gint i = 1;
while (tokens[i])
{
gint64 id = g_ascii_strtoll (tokens[i], NULL, 10);
items = g_list_prepend (items, pika_item_get_by_id (pika, id));
i++;
}
items = g_list_reverse (items);
}
g_strfreev (tokens);
}
return items;
}
void
pika_selection_data_set_object (GtkSelectionData *selection,
PikaObject *object)
{
const gchar *name;
g_return_if_fail (selection != NULL);
g_return_if_fail (PIKA_IS_OBJECT (object));
name = pika_object_get_name (object);
if (name)
{
gchar *str;
str = g_strdup_printf ("%d:%p:%s", pika_get_pid (), object, name);
gtk_selection_data_set (selection,
gtk_selection_data_get_target (selection),
8, (guchar *) str, strlen (str));
g_free (str);
}
}
PikaBrush *
pika_selection_data_get_brush (GtkSelectionData *selection,
Pika *pika)
{
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
return (PikaBrush *)
pika_selection_data_get_object (selection,
pika_data_factory_get_container (pika->brush_factory),
PIKA_OBJECT (pika_brush_get_standard (pika_get_user_context (pika))));
}
PikaPattern *
pika_selection_data_get_pattern (GtkSelectionData *selection,
Pika *pika)
{
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
return (PikaPattern *)
pika_selection_data_get_object (selection,
pika_data_factory_get_container (pika->pattern_factory),
PIKA_OBJECT (pika_pattern_get_standard (pika_get_user_context (pika))));
}
PikaGradient *
pika_selection_data_get_gradient (GtkSelectionData *selection,
Pika *pika)
{
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
return (PikaGradient *)
pika_selection_data_get_object (selection,
pika_data_factory_get_container (pika->gradient_factory),
PIKA_OBJECT (pika_gradient_get_standard (pika_get_user_context (pika))));
}
PikaPalette *
pika_selection_data_get_palette (GtkSelectionData *selection,
Pika *pika)
{
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
return (PikaPalette *)
pika_selection_data_get_object (selection,
pika_data_factory_get_container (pika->palette_factory),
PIKA_OBJECT (pika_palette_get_standard (pika_get_user_context (pika))));
}
PikaFont *
pika_selection_data_get_font (GtkSelectionData *selection,
Pika *pika)
{
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
return (PikaFont *)
pika_selection_data_get_object (selection,
pika_data_factory_get_container (pika->font_factory),
PIKA_OBJECT (pika_font_get_standard ()));
}
PikaBuffer *
pika_selection_data_get_buffer (GtkSelectionData *selection,
Pika *pika)
{
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
return (PikaBuffer *)
pika_selection_data_get_object (selection,
pika->named_buffers,
PIKA_OBJECT (pika_get_clipboard_buffer (pika)));
}
PikaImagefile *
pika_selection_data_get_imagefile (GtkSelectionData *selection,
Pika *pika)
{
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
return (PikaImagefile *) pika_selection_data_get_object (selection,
pika->documents,
NULL);
}
PikaTemplate *
pika_selection_data_get_template (GtkSelectionData *selection,
Pika *pika)
{
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
return (PikaTemplate *) pika_selection_data_get_object (selection,
pika->templates,
NULL);
}
PikaToolItem *
pika_selection_data_get_tool_item (GtkSelectionData *selection,
Pika *pika)
{
PikaToolItem *tool_item;
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (selection != NULL, NULL);
tool_item = (PikaToolItem *)
pika_selection_data_get_object (selection,
pika->tool_info_list,
PIKA_OBJECT (pika_tool_info_get_standard (pika)));
if (! tool_item)
{
tool_item = (PikaToolItem *)
pika_selection_data_get_object (selection,
pika->tool_item_list,
NULL);
}
return tool_item;
}
/* private functions */
static const gchar *
pika_selection_data_get_name (GtkSelectionData *selection,
const gchar *strfunc)
{
const gchar *name;
if (gtk_selection_data_get_format (selection) != 8 ||
gtk_selection_data_get_length (selection) < 1)
{
g_warning ("%s: received invalid selection data", strfunc);
return NULL;
}
name = (const gchar *) gtk_selection_data_get_data (selection);
if (! g_utf8_validate (name, -1, NULL))
{
g_warning ("%s: received invalid selection data "
"(doesn't validate as UTF-8)", strfunc);
return NULL;
}
PIKA_LOG (DND, "name = '%s'", name);
return name;
}
static PikaObject *
pika_selection_data_get_object (GtkSelectionData *selection,
PikaContainer *container,
PikaObject *additional)
{
const gchar *str;
str = pika_selection_data_get_name (selection, G_STRFUNC);
if (str)
{
gint pid;
gpointer object_addr;
gint name_offset = 0;
if (sscanf (str, "%i:%p:%n", &pid, &object_addr, &name_offset) >= 2 &&
pid == pika_get_pid () && name_offset > 0)
{
const gchar *name = str + name_offset;
PIKA_LOG (DND, "pid = %d, addr = %p, name = '%s'",
pid, object_addr, name);
if (additional &&
strcmp (name, pika_object_get_name (additional)) == 0 &&
object_addr == (gpointer) additional)
{
return additional;
}
else
{
PikaObject *object;
object = pika_container_get_child_by_name (container, name);
if (object_addr == (gpointer) object)
return object;
}
}
}
return NULL;
}
/* the next two functions are straight cut'n'paste from glib/glib/gconvert.c,
* except that pika_unescape_uri_string() does not try to UTF-8 validate
* the unescaped result.
*/
static int
unescape_character (const char *scanner)
{
int first_digit;
int second_digit;
first_digit = g_ascii_xdigit_value (scanner[0]);
if (first_digit < 0)
return -1;
second_digit = g_ascii_xdigit_value (scanner[1]);
if (second_digit < 0)
return -1;
return (first_digit << 4) | second_digit;
}
static gchar *
pika_unescape_uri_string (const char *escaped,
int len,
const char *illegal_escaped_characters,
gboolean ascii_must_not_be_escaped)
{
const gchar *in, *in_end;
gchar *out, *result;
int c;
if (escaped == NULL)
return NULL;
if (len < 0)
len = strlen (escaped);
result = g_malloc (len + 1);
out = result;
for (in = escaped, in_end = escaped + len; in < in_end; in++)
{
c = *in;
if (c == '%')
{
/* catch partial escape sequences past the end of the substring */
if (in + 3 > in_end)
break;
c = unescape_character (in + 1);
/* catch bad escape sequences and NUL characters */
if (c <= 0)
break;
/* catch escaped ASCII */
if (ascii_must_not_be_escaped && c <= 0x7F)
break;
/* catch other illegal escaped characters */
if (strchr (illegal_escaped_characters, c) != NULL)
break;
in += 2;
}
*out++ = c;
}
pika_assert (out - result <= len);
*out = '\0';
if (in != in_end)
{
g_free (result);
return NULL;
}
return result;
}
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