PIKApp/app/text/pikatextlayer-xcf.c

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2023-09-26 00:35:21 +02:00
/* 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 Spencer Kimball and Peter Mattis
*
* PikaText
* Copyright (C) 2003 Sven Neumann <sven@gimp.org>
*
* 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 <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include <cairo.h>
#include "libpikabase/pikabase.h"
#include "text-types.h"
#include "core/pika.h"
#include "core/pikadrawable-private.h" /* eek */
#include "core/pikaimage.h"
#include "core/pikaparasitelist.h"
#include "pikatext.h"
#include "pikatext-parasite.h"
#include "pikatextlayer.h"
#include "pikatextlayer-xcf.h"
#include "pika-intl.h"
enum
{
TEXT_LAYER_XCF_NONE = 0,
TEXT_LAYER_XCF_DONT_AUTO_RENAME = 1 << 0,
TEXT_LAYER_XCF_MODIFIED = 1 << 1
};
static PikaLayer * pika_text_layer_from_layer (PikaLayer *layer,
PikaText *text);
gboolean
pika_text_layer_xcf_load_hack (PikaLayer **layer)
{
const gchar *name;
PikaText *text = NULL;
const PikaParasite *parasite;
gboolean before_xcf_v19 = FALSE;
g_return_val_if_fail (layer != NULL, FALSE);
g_return_val_if_fail (PIKA_IS_LAYER (*layer), FALSE);
name = pika_text_parasite_name ();
parasite = pika_item_parasite_find (PIKA_ITEM (*layer), name);
if (parasite)
{
GError *error = NULL;
text = pika_text_from_parasite (parasite,
pika_item_get_image (PIKA_ITEM (*layer))->pika,
&before_xcf_v19,
&error);
if (error)
{
pika_message (pika_item_get_image (PIKA_ITEM (*layer))->pika, NULL,
PIKA_MESSAGE_ERROR,
_("Problems parsing the text parasite for layer '%s':\n"
"%s\n\n"
"Some text properties may be wrong. "
"Unless you want to edit the text layer, "
"you don't need to worry about this."),
pika_object_get_name (*layer),
error->message);
g_clear_error (&error);
}
}
else
{
name = pika_text_gdyntext_parasite_name ();
parasite = pika_item_parasite_find (PIKA_ITEM (*layer), name);
if (parasite)
{
text = pika_text_from_gdyntext_parasite (parasite);
before_xcf_v19 = TRUE;
}
}
if (text)
{
*layer = pika_text_layer_from_layer (*layer, text);
/* let the text layer knows what parasite was used to create it */
PIKA_TEXT_LAYER (*layer)->text_parasite = name;
PIKA_TEXT_LAYER (*layer)->text_parasite_is_old = before_xcf_v19;
}
return (text != NULL);
}
void
pika_text_layer_xcf_save_prepare (PikaTextLayer *layer)
{
PikaText *text;
g_return_if_fail (PIKA_IS_TEXT_LAYER (layer));
/* If the layer has a text parasite already, it wasn't changed and we
* can simply save the original parasite back which is still attached.
*/
if (layer->text_parasite)
return;
text = pika_text_layer_get_text (layer);
if (text)
{
PikaParasite *parasite = pika_text_to_parasite (text);
/* Don't push an undo because the parasite only exists temporarily
* while the text layer is saved to XCF.
*/
pika_item_parasite_attach (PIKA_ITEM (layer), parasite, FALSE);
pika_parasite_free (parasite);
}
}
guint32
pika_text_layer_get_xcf_flags (PikaTextLayer *text_layer)
{
guint flags = 0;
g_return_val_if_fail (PIKA_IS_TEXT_LAYER (text_layer), 0);
if (! text_layer->auto_rename)
flags |= TEXT_LAYER_XCF_DONT_AUTO_RENAME;
if (text_layer->modified)
flags |= TEXT_LAYER_XCF_MODIFIED;
return flags;
}
void
pika_text_layer_set_xcf_flags (PikaTextLayer *text_layer,
guint32 flags)
{
g_return_if_fail (PIKA_IS_TEXT_LAYER (text_layer));
g_object_set (text_layer,
"auto-rename", (flags & TEXT_LAYER_XCF_DONT_AUTO_RENAME) == 0,
"modified", (flags & TEXT_LAYER_XCF_MODIFIED) != 0,
NULL);
}
/**
* pika_text_layer_from_layer:
* @layer: a #PikaLayer object
* @text: a #PikaText object
*
* Converts a standard #PikaLayer and a #PikaText object into a
* #PikaTextLayer. The new text layer takes ownership of the @text and
* @layer objects. The @layer object is rendered unusable by this
* function. Don't even try to use if afterwards!
*
* This is a gross hack that is needed in order to load text layers
* from XCF files in a backwards-compatible way. Please don't use it
* for anything else!
*
* Returns: a newly allocated #PikaTextLayer object
**/
static PikaLayer *
pika_text_layer_from_layer (PikaLayer *layer,
PikaText *text)
{
PikaTextLayer *text_layer;
PikaDrawable *drawable;
g_return_val_if_fail (PIKA_IS_LAYER (layer), NULL);
g_return_val_if_fail (PIKA_IS_TEXT (text), NULL);
text_layer = g_object_new (PIKA_TYPE_TEXT_LAYER,
"image", pika_item_get_image (PIKA_ITEM (layer)),
NULL);
pika_item_replace_item (PIKA_ITEM (text_layer), PIKA_ITEM (layer));
drawable = PIKA_DRAWABLE (text_layer);
pika_drawable_steal_buffer (drawable, PIKA_DRAWABLE (layer));
pika_layer_set_opacity (PIKA_LAYER (text_layer),
pika_layer_get_opacity (layer), FALSE);
pika_layer_set_mode (PIKA_LAYER (text_layer),
pika_layer_get_mode (layer), FALSE);
pika_layer_set_blend_space (PIKA_LAYER (text_layer),
pika_layer_get_blend_space (layer), FALSE);
pika_layer_set_composite_space (PIKA_LAYER (text_layer),
pika_layer_get_composite_space (layer), FALSE);
pika_layer_set_composite_mode (PIKA_LAYER (text_layer),
pika_layer_get_composite_mode (layer), FALSE);
pika_layer_set_lock_alpha (PIKA_LAYER (text_layer),
pika_layer_get_lock_alpha (layer), FALSE);
pika_text_layer_set_text (text_layer, text);
g_object_unref (text);
g_object_unref (layer);
return PIKA_LAYER (text_layer);
}