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-rw-r--r--e-util/e-icon-factory.c288
1 files changed, 288 insertions, 0 deletions
diff --git a/e-util/e-icon-factory.c b/e-util/e-icon-factory.c
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+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+/* e-icon-factory.c - Icon factory for the Evolution components.
+ *
+ * Copyright (C) 2002 Ximian, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author: Ettore Perazzoli <ettore@ximian.com>, Michael Terry <mterry@fastmail.fm>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <libgnomeui/gnome-icon-theme.h>
+#include <e-util/e-icon-factory.h>
+#include "art/empty.xpm"
+
+
+/* One icon. Keep both a small (16x16) and a large (48x48) version around. */
+struct _Icon {
+ char *name;
+ GdkPixbuf *pixbuf_16;
+ GdkPixbuf *pixbuf_24;
+ GdkPixbuf *pixbuf_48;
+};
+typedef struct _Icon Icon;
+
+/* Hash of all the icons. */
+static GHashTable *name_to_icon = NULL;
+static GnomeIconTheme *icon_theme = NULL;
+static GdkPixbuf *empty_pixbuf = NULL;
+
+
+/* Creating and destroying icons. */
+
+static Icon *
+icon_new (const gchar *name,
+ GdkPixbuf *pixbuf_16,
+ GdkPixbuf *pixbuf_24,
+ GdkPixbuf *pixbuf_48)
+{
+ Icon *icon;
+
+ icon = g_new (Icon, 1);
+ icon->name = g_strdup (name);
+ icon->pixbuf_16 = pixbuf_16;
+ icon->pixbuf_24 = pixbuf_24;
+ icon->pixbuf_48 = pixbuf_48;
+
+ if (pixbuf_16 != NULL)
+ g_object_ref (pixbuf_16);
+ if (pixbuf_24 != NULL)
+ g_object_ref (pixbuf_24);
+ if (pixbuf_48 != NULL)
+ g_object_ref (pixbuf_48);
+
+ return icon;
+}
+
+#if 0
+
+/* (This is not currently used since we never prune icons out of the
+ cache.) */
+static void
+icon_free (Icon *icon)
+{
+ g_free (icon->name);
+
+ if (icon->pixbuf_16 != NULL)
+ g_object_unref (icon->pixbuf_16);
+ if (icon->pixbuf_24 != NULL)
+ g_object_unref (icon->pixbuf_24);
+ if (icon->pixbuf_48 != NULL)
+ g_object_unref (icon->pixbuf_48);
+
+ g_free (icon);
+}
+
+#endif
+
+
+/* Loading icons. */
+
+static Icon *
+load_icon (const gchar *icon_name)
+{
+ GdkPixbuf *unscaled;
+ GdkPixbuf *pixbuf_16;
+ GdkPixbuf *pixbuf_24;
+ GdkPixbuf *pixbuf_48;
+ gchar *filename;
+ Icon *icon;
+
+ filename = gnome_icon_theme_lookup_icon (icon_theme, icon_name, 16,
+ NULL, NULL);
+
+ if (filename == NULL)
+ return NULL;
+ unscaled = gdk_pixbuf_new_from_file (filename, NULL);
+ pixbuf_16 = gdk_pixbuf_scale_simple (unscaled, 16, 16, GDK_INTERP_BILINEAR);
+ g_object_unref (unscaled);
+ g_free (filename);
+
+ filename = gnome_icon_theme_lookup_icon (icon_theme, icon_name, 24,
+ NULL, NULL);
+
+ if (filename == NULL)
+ return NULL;
+ unscaled = gdk_pixbuf_new_from_file (filename, NULL);
+ pixbuf_24 = gdk_pixbuf_scale_simple (unscaled, 24, 24, GDK_INTERP_BILINEAR);
+ g_object_unref (unscaled);
+ g_free (filename);
+
+ filename = gnome_icon_theme_lookup_icon (icon_theme, icon_name, 48,
+ NULL, NULL);
+
+ if (filename == NULL)
+ return NULL;
+ unscaled = gdk_pixbuf_new_from_file (filename, NULL);
+ pixbuf_48 = gdk_pixbuf_scale_simple (unscaled, 48, 48, GDK_INTERP_BILINEAR);
+ g_object_unref (unscaled);
+ g_free (filename);
+
+ icon = icon_new (icon_name, pixbuf_16, pixbuf_24, pixbuf_48);
+
+ g_object_unref (pixbuf_16);
+ g_object_unref (pixbuf_24);
+ g_object_unref (pixbuf_48);
+
+ return icon;
+}
+
+
+/* Public API. */
+
+void
+e_icon_factory_init (void)
+{
+ if (name_to_icon != NULL) {
+ /* Already initialized. */
+ return;
+ }
+
+ name_to_icon = g_hash_table_new (g_str_hash, g_str_equal);
+ icon_theme = gnome_icon_theme_new ();
+ empty_pixbuf = gdk_pixbuf_new_from_xpm_data ((const char **) empty_xpm);
+}
+
+gchar *
+e_icon_factory_get_icon_filename (const gchar *icon_name,
+ gint icon_size)
+{
+ gchar *filename;
+
+ g_return_val_if_fail (icon_name != NULL, NULL);
+ g_return_val_if_fail (strcmp (icon_name, ""), NULL);
+
+ filename = gnome_icon_theme_lookup_icon (icon_theme,
+ icon_name,
+ icon_size,
+ NULL,
+ NULL);
+
+ return filename;
+}
+
+/* Loads the themed version of the icon name at the appropriate size.
+ The returned icon is guaranteed to be the requested size and exist. If
+ the themed icon cannot be found, an empty icon is returned. */
+GdkPixbuf *
+e_icon_factory_get_icon (const gchar *icon_name,
+ gint icon_size)
+{
+ if (icon_name != NULL && strcmp (icon_name, "")) {
+ Icon *icon;
+
+ icon = g_hash_table_lookup (name_to_icon, icon_name);
+ if (icon == NULL) {
+ icon = load_icon (icon_name);
+ if (icon == NULL) {
+ g_warning ("Icon not found -- %s", icon_name);
+
+ /* Create an empty icon so that we don't keep spitting
+ out the same warning over and over, every time this
+ icon is requested. */
+
+ icon = icon_new (icon_name, NULL, NULL, NULL);
+ g_hash_table_insert (name_to_icon, icon->name, icon);
+ }
+ else {
+ g_hash_table_insert (name_to_icon, icon->name, icon);
+ }
+ }
+
+ if (icon->pixbuf_16) {
+ gchar *filename;
+ GdkPixbuf *pixbuf, *scaled;
+
+ switch (icon_size) {
+ case 16:
+ return g_object_ref (icon->pixbuf_16);
+
+ case 24:
+ return g_object_ref (icon->pixbuf_24);
+
+ case 48:
+ return g_object_ref (icon->pixbuf_48);
+
+ default:
+ /* Non-standard size. Do a non-cached load. */
+
+ filename = gnome_icon_theme_lookup_icon (icon_theme,
+ icon_name,
+ icon_size,
+ NULL,
+ NULL);
+ if (filename == NULL)
+ break;
+
+ pixbuf = gdk_pixbuf_new_from_file (filename, NULL);
+ g_free (filename);
+ if (pixbuf == NULL)
+ break;
+
+ scaled = gdk_pixbuf_scale_simple (pixbuf, icon_size, icon_size, GDK_INTERP_BILINEAR);
+ g_object_unref (pixbuf);
+
+ return scaled;
+ }
+ }
+ }
+
+ /* icon not found -- create an empty icon */
+ return gdk_pixbuf_scale_simple (empty_pixbuf, icon_size, icon_size, GDK_INTERP_NEAREST);
+}
+
+GList *
+e_icon_factory_get_icon_list (const gchar *icon_name)
+{
+ if (icon_name != NULL && strcmp (icon_name, "")) {
+ Icon *icon;
+
+ icon = g_hash_table_lookup (name_to_icon, icon_name);
+ if (icon == NULL) {
+ icon = load_icon (icon_name);
+ if (icon == NULL) {
+ g_warning ("Icon not found -- %s", icon_name);
+
+ /* Create an empty icon so that we don't keep spitting
+ out the same warning over and over, every time this
+ icon is requested. */
+
+ icon = icon_new (icon_name, NULL, NULL, NULL);
+ g_hash_table_insert (name_to_icon, icon->name, icon);
+ }
+ else {
+ g_hash_table_insert (name_to_icon, icon->name, icon);
+ }
+ }
+
+ if (icon->pixbuf_16) {
+ GList *list = NULL;
+
+ list = g_list_append (list, g_object_ref (icon->pixbuf_48));
+ list = g_list_append (list, g_object_ref (icon->pixbuf_24));
+ list = g_list_append (list, g_object_ref (icon->pixbuf_16));
+
+ return list;
+ }
+ }
+
+ /* icons not found */
+ return NULL;
+}
generated by cgit (git 2.34.1) at 2024-11-19 11:12:44 +0800