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/*
* icons.[ch] written by Paolo Bacchilega, who writes:
* "There is no problem for me, you can license my code
* under whatever licence you wish :)"
*
* $Id: icons.c 12639 2011-08-07 18:41:13Z jordan $
*/
#include <string.h> /* strcmp */
#include <glib.h>
#include <gtk/gtk.h>
#include <gio/gio.h>
#include "icons.h"
#define VOID_PIXBUF_KEY "void-pixbuf"
static const char *get_static_string(const char *s)
{
static GStringChunk *static_strings = NULL;
if (s == NULL)
return NULL;
if (static_strings == NULL)
static_strings = g_string_chunk_new(1024);
return g_string_chunk_insert_const(static_strings, s);
}
typedef struct {
GtkIconTheme *icon_theme;
int icon_size;
GHashTable *cache;
} IconCache;
static IconCache *icon_cache[7] =
{ NULL, NULL, NULL, NULL, NULL, NULL, NULL };
static GdkPixbuf *create_void_pixbuf(int width, int height)
{
GdkPixbuf *p;
p = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, width, height);
gdk_pixbuf_fill(p, 0xFFFFFF00);
return p;
}
static int get_size_in_pixels(GtkWidget * widget, GtkIconSize icon_size)
{
int width, height;
gtk_icon_size_lookup_for_settings(gtk_widget_get_settings(widget),
icon_size, &width, &height);
return MAX(width, height);
}
static IconCache *icon_cache_new(GtkWidget * for_widget, int icon_size)
{
IconCache *icon_cache;
g_return_val_if_fail(for_widget != NULL, NULL);
icon_cache = g_new0(IconCache, 1);
icon_cache->icon_theme =
gtk_icon_theme_get_for_screen(gtk_widget_get_screen(for_widget));
icon_cache->icon_size = get_size_in_pixels(for_widget, icon_size);
icon_cache->cache =
g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
g_object_unref);
g_hash_table_insert(icon_cache->cache, (void *) VOID_PIXBUF_KEY,
create_void_pixbuf(icon_cache->icon_size,
icon_cache->icon_size));
return icon_cache;
}
static const char *_icon_cache_get_icon_key(GIcon * icon)
{
const char *key = NULL;
if (G_IS_THEMED_ICON(icon)) {
char **icon_names;
char *name;
g_object_get(icon, "names", &icon_names, NULL);
name = g_strjoinv(",", icon_names);
key = get_static_string(name);
g_free(name);
g_strfreev(icon_names);
} else if (G_IS_FILE_ICON(icon)) {
GFile *file;
char *filename;
file = g_file_icon_get_file(G_FILE_ICON(icon));
filename = g_file_get_path(file);
key = get_static_string(filename);
g_free(filename);
g_object_unref(file);
}
return key;
}
static GdkPixbuf *get_themed_icon_pixbuf(GThemedIcon * icon,
int size,
GtkIconTheme * icon_theme)
{
char **icon_names = NULL;
GtkIconInfo *icon_info;
GdkPixbuf *pixbuf;
GError *error = NULL;
g_object_get(icon, "names", &icon_names, NULL);
icon_info =
gtk_icon_theme_choose_icon(icon_theme, (const char **) icon_names,
size, 0);
if (icon_info == NULL)
icon_info =
gtk_icon_theme_lookup_icon(icon_theme, "text-x-generic", size,
GTK_ICON_LOOKUP_USE_BUILTIN);
pixbuf = gtk_icon_info_load_icon(icon_info, &error);
if (pixbuf == NULL) {
if (error && error->message)
g_warning("could not load icon pixbuf: %s\n", error->message);
g_clear_error(&error);
}
gtk_icon_info_free(icon_info);
g_strfreev(icon_names);
return pixbuf;
}
static GdkPixbuf *get_file_icon_pixbuf(GFileIcon * icon, int size)
{
GFile *file;
char *filename;
GdkPixbuf *pixbuf;
file = g_file_icon_get_file(icon);
filename = g_file_get_path(file);
pixbuf = gdk_pixbuf_new_from_file_at_size(filename, size, -1, NULL);
g_free(filename);
g_object_unref(file);
return pixbuf;
}
static GdkPixbuf *_get_icon_pixbuf(GIcon * icon, int size,
GtkIconTheme * theme)
{
if (icon == NULL)
return NULL;
if (G_IS_THEMED_ICON(icon))
return get_themed_icon_pixbuf(G_THEMED_ICON(icon), size, theme);
if (G_IS_FILE_ICON(icon))
return get_file_icon_pixbuf(G_FILE_ICON(icon), size);
return NULL;
}
static GdkPixbuf *icon_cache_get_mime_type_icon(IconCache * icon_cache,
const char *mime_type)
{
GIcon *icon;
const char *key = NULL;
GdkPixbuf *pixbuf;
icon = g_content_type_get_icon(mime_type);
key = _icon_cache_get_icon_key(icon);
if (key == NULL)
key = VOID_PIXBUF_KEY;
pixbuf = g_hash_table_lookup(icon_cache->cache, key);
if (pixbuf != NULL) {
g_object_ref(pixbuf);
g_object_unref(G_OBJECT(icon));
return pixbuf;
}
pixbuf =
_get_icon_pixbuf(icon, icon_cache->icon_size,
icon_cache->icon_theme);
if (pixbuf != NULL)
g_hash_table_insert(icon_cache->cache, (gpointer) key,
g_object_ref(pixbuf));
g_object_unref(G_OBJECT(icon));
return pixbuf;
}
GdkPixbuf *gtr_get_mime_type_icon(const char *mime_type,
GtkIconSize icon_size,
GtkWidget * for_widget)
{
int n;
switch (icon_size) {
case GTK_ICON_SIZE_MENU:
n = 1;
break;
case GTK_ICON_SIZE_SMALL_TOOLBAR:
n = 2;
break;
case GTK_ICON_SIZE_LARGE_TOOLBAR:
n = 3;
break;
case GTK_ICON_SIZE_BUTTON:
n = 4;
break;
case GTK_ICON_SIZE_DND:
n = 5;
break;
case GTK_ICON_SIZE_DIALOG:
n = 6;
break;
default /*GTK_ICON_SIZE_INVALID */ :
n = 0;
break;
}
if (icon_cache[n] == NULL)
icon_cache[n] = icon_cache_new(for_widget, icon_size);
return icon_cache_get_mime_type_icon(icon_cache[n], mime_type);
}
const char *gtr_get_mime_type_from_filename(const char *file G_GNUC_UNUSED)
{
char *tmp = g_content_type_guess(file, NULL, 0, NULL);
const char *ret = get_static_string(tmp);
g_free(tmp);
return ret;
}
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