transmission/gtk/icons.c

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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 <string.h> /* strcmp */
#include <glib.h>
#include <gtk/gtk.h>
#include "icons.h"
#ifdef HAVE_GIO
#if GTK_CHECK_VERSION( 2, 12, 0 )
#define USE_GIO_ICONS
#endif
#endif
#ifdef USE_GIO_ICONS
#include <gio/gio.h>
#endif
#define VOID_PIXBUF_KEY "void-pixbuf"
#ifdef USE_GIO_ICONS
static const char *
get_static_string( const char *s )
{
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static GStringChunk * static_strings = NULL;
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if( s == NULL )
return NULL;
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if( static_strings == NULL )
static_strings = g_string_chunk_new( 1024 );
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return g_string_chunk_insert_const( static_strings, s );
}
#endif
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;
}
#ifdef USE_GIO_ICONS
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;
}
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pixbuf = _get_icon_pixbuf( icon, icon_cache->icon_size, icon_cache->icon_theme );
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if( pixbuf != NULL )
g_hash_table_insert( icon_cache->cache, (gpointer) key, g_object_ref( pixbuf ) );
g_object_unref( G_OBJECT( icon ) );
return pixbuf;
}
#else /* USE_GIO_ICONS */
static GdkPixbuf *
icon_cache_get_mime_type_icon( IconCache * icon_cache, const char * mime_type )
{
GdkPixbuf * pixbuf;
const char * stock_name;
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if( !strcmp( mime_type, UNKNOWN_MIME_TYPE ) )
stock_name = GTK_STOCK_MISSING_IMAGE;
else if( !strcmp( mime_type, DIRECTORY_MIME_TYPE ) )
stock_name = GTK_STOCK_DIRECTORY;
else
stock_name = GTK_STOCK_FILE;
pixbuf = g_hash_table_lookup( icon_cache->cache, stock_name );
if( pixbuf != NULL )
{
g_object_ref( pixbuf );
return pixbuf;
}
pixbuf = gtk_icon_theme_load_icon( icon_cache->icon_theme,
stock_name,
icon_cache->icon_size,
0, NULL );
g_hash_table_insert( icon_cache->cache, (gpointer) stock_name, g_object_ref( pixbuf ));
return pixbuf;
}
#endif
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 )
{
#ifdef USE_GIO_ICONS
char * tmp = g_content_type_guess( file, NULL, 0, NULL );
const char * ret = get_static_string( tmp );
g_free( tmp );
return ret;
#else
return "uncertain";
#endif
}