transmission/gtk/icons.c

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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 :)"
*
* $Id$
*/
#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)
{
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static GStringChunk * static_strings = NULL;
if (s == NULL)
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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);
}
#if GTK_CHECK_VERSION(3,8,0)
g_object_unref (icon_info);
#else
gtk_icon_info_free (icon_info);
#endif
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;
}
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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)
{
char * tmp = g_content_type_guess (file, NULL, 0, NULL);
const char * ret = get_static_string (tmp);
g_free (tmp);
return ret;
}