PIKApp/app/widgets/pikaviewrendererimagefile.c

216 lines
6.6 KiB
C

/* 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
*
* pikaviewrendererimagefile.c
* Copyright (C) 2004 Michael Natterer <mitch@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 <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libpikathumb/pikathumb.h"
#include "libpikawidgets/pikawidgets.h"
#include "widgets-types.h"
#include "core/pikaimagefile.h"
#include "pikaviewrendererimagefile.h"
#include "pikaviewrenderer-frame.h"
#include "pikawidgets-utils.h"
static void pika_view_renderer_imagefile_render (PikaViewRenderer *renderer,
GtkWidget *widget);
static GdkPixbuf * pika_view_renderer_imagefile_get_icon (PikaImagefile *imagefile,
GtkWidget *widget,
gint size);
G_DEFINE_TYPE (PikaViewRendererImagefile, pika_view_renderer_imagefile,
PIKA_TYPE_VIEW_RENDERER)
#define parent_class pika_view_renderer_imagefile_parent_class
static void
pika_view_renderer_imagefile_class_init (PikaViewRendererImagefileClass *klass)
{
PikaViewRendererClass *renderer_class = PIKA_VIEW_RENDERER_CLASS (klass);
renderer_class->render = pika_view_renderer_imagefile_render;
}
static void
pika_view_renderer_imagefile_init (PikaViewRendererImagefile *renderer)
{
}
static void
pika_view_renderer_imagefile_render (PikaViewRenderer *renderer,
GtkWidget *widget)
{
GdkPixbuf *pixbuf;
gint scale_factor = gtk_widget_get_scale_factor (widget);
gint width = renderer->width * scale_factor;
gint height = renderer->height * scale_factor;
pixbuf = pika_view_renderer_get_frame_pixbuf (renderer, widget,
width, height);
if (! pixbuf)
{
PikaImagefile *imagefile = PIKA_IMAGEFILE (renderer->viewable);
pixbuf = pika_view_renderer_imagefile_get_icon (imagefile,
widget,
MAX (width, height));
}
if (pixbuf)
{
pika_view_renderer_render_pixbuf (renderer, widget, pixbuf);
g_object_unref (pixbuf);
}
else
{
const gchar *icon_name = pika_viewable_get_icon_name (renderer->viewable);
pika_view_renderer_render_icon (renderer, widget, icon_name);
}
}
/* The code to get an icon for a mime-type is lifted from GtkRecentManager. */
static GdkPixbuf *
get_icon_for_mime_type (const gchar *mime_type,
gint pixel_size)
{
GtkIconTheme *icon_theme;
const gchar *separator;
GString *icon_name;
GdkPixbuf *pixbuf;
separator = strchr (mime_type, '/');
if (! separator)
return NULL;
icon_theme = gtk_icon_theme_get_default ();
/* try with the three icon name variants for MIME types */
/* canonicalize MIME type: foo/x-bar -> foo-x-bar */
icon_name = g_string_new (NULL);
g_string_append_len (icon_name, mime_type, separator - mime_type);
g_string_append_c (icon_name, '-');
g_string_append (icon_name, separator + 1);
pixbuf = gtk_icon_theme_load_icon (icon_theme, icon_name->str,
pixel_size, 0, NULL);
g_string_free (icon_name, TRUE);
if (pixbuf)
return pixbuf;
/* canonicalize MIME type, and prepend "gnome-mime-" */
icon_name = g_string_new ("gnome-mime-");
g_string_append_len (icon_name, mime_type, separator - mime_type);
g_string_append_c (icon_name, '-');
g_string_append (icon_name, separator + 1);
pixbuf = gtk_icon_theme_load_icon (icon_theme, icon_name->str,
pixel_size, 0, NULL);
g_string_free (icon_name, TRUE);
if (pixbuf)
return pixbuf;
/* try the MIME family icon */
icon_name = g_string_new ("gnome-mime-");
g_string_append_len (icon_name, mime_type, separator - mime_type);
pixbuf = gtk_icon_theme_load_icon (icon_theme, icon_name->str,
pixel_size, 0, NULL);
g_string_free (icon_name, TRUE);
return pixbuf;
}
static GdkPixbuf *
pika_view_renderer_imagefile_get_icon (PikaImagefile *imagefile,
GtkWidget *widget,
gint size)
{
GdkScreen *screen = gtk_widget_get_screen (widget);
GtkIconTheme *icon_theme = gtk_icon_theme_get_for_screen (screen);
PikaThumbnail *thumbnail = pika_imagefile_get_thumbnail (imagefile);
GdkPixbuf *pixbuf = NULL;
if (! pika_object_get_name (imagefile))
return NULL;
if (! pixbuf)
{
GIcon *icon = pika_imagefile_get_gicon (imagefile);
if (icon)
{
GtkIconInfo *info;
info = gtk_icon_theme_lookup_by_gicon (icon_theme, icon, size, 0);
if (info)
{
pixbuf = gtk_icon_info_load_icon (info, NULL);
g_object_unref (info);
}
}
}
if (! pixbuf)
{
if (thumbnail->image_mimetype)
{
pixbuf = get_icon_for_mime_type (thumbnail->image_mimetype, size);
}
else if (thumbnail->image_state == PIKA_THUMB_STATE_FOLDER)
{
pixbuf = get_icon_for_mime_type ("inode/directory", size);
}
}
if (! pixbuf)
{
const gchar *icon_name = "text-x-generic";
if (thumbnail->image_state == PIKA_THUMB_STATE_FOLDER)
icon_name = "folder";
pixbuf = gtk_icon_theme_load_icon (icon_theme,
icon_name, size,
GTK_ICON_LOOKUP_USE_BUILTIN,
NULL);
}
return pixbuf;
}