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-rw-r--r--gtk/gtkicontheme.c2535
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diff --git a/gtk/gtkicontheme.c b/gtk/gtkicontheme.c
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+++ b/gtk/gtkicontheme.c
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+/* GtkIconTheme - a loader for icon themes
+ * gtk-icon-theme.c Copyright (C) 2002, 2003 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <glib.h>
+
+#include "gtkicontheme.h"
+#include "gtkiconthemeparser.h"
+#include "gtkintl.h"
+#include "gtksettings.h"
+
+#define DEFAULT_THEME_NAME "hicolor"
+
+typedef struct _GtkIconData GtkIconData;
+
+typedef enum
+{
+ ICON_THEME_DIR_FIXED,
+ ICON_THEME_DIR_SCALABLE,
+ ICON_THEME_DIR_THRESHOLD,
+ ICON_THEME_DIR_UNTHEMED
+} IconThemeDirType;
+
+/* In reverse search order: */
+typedef enum
+{
+ ICON_SUFFIX_NONE = 0,
+ ICON_SUFFIX_XPM = 1 << 0,
+ ICON_SUFFIX_SVG = 1 << 1,
+ ICON_SUFFIX_PNG = 1 << 2,
+} IconSuffix;
+
+
+struct _GtkIconThemePrivate
+{
+ guint custom_theme : 1;
+ guint is_screen_singleton : 1;
+ guint pixbuf_supports_svg : 1;
+
+ char *current_theme;
+ char **search_path;
+ int search_path_len;
+
+ gboolean themes_valid;
+ /* A list of all the themes needed to look up icons.
+ * In search order, without duplicates
+ */
+ GList *themes;
+ GHashTable *unthemed_icons;
+
+ /* Note: The keys of this hashtable are owned by the
+ * themedir and unthemed hashtables.
+ */
+ GHashTable *all_icons;
+
+ /* GdkScreen for the icon theme (may be NULL)
+ */
+ GdkScreen *screen;
+
+ /* time when we last stat:ed for theme changes */
+ long last_stat_time;
+ GList *dir_mtimes;
+};
+
+struct _GtkIconInfo
+{
+ guint ref_count;
+
+ /* Information about the source
+ */
+ gchar *filename;
+ GdkPixbuf *builtin_pixbuf;
+
+ GtkIconData *data;
+
+ /* Information about the directory where
+ * the source was found
+ */
+ IconThemeDirType dir_type;
+ gint dir_size;
+ gint threshold;
+
+ /* Parameters influencing the scaled icon
+ */
+ gint desired_size;
+ gboolean raw_coordinates;
+
+ /* Cached information if we go ahead and try to load
+ * the icon.
+ */
+ GdkPixbuf *pixbuf;
+ GError *load_error;
+ gdouble scale;
+};
+
+typedef struct
+{
+ char *name;
+ char *display_name;
+ char *comment;
+ char *example;
+
+ /* In search order */
+ GList *dirs;
+} IconTheme;
+
+struct _GtkIconData
+{
+ gboolean has_embedded_rect;
+ gint x0, y0, x1, y1;
+
+ GdkPoint *attach_points;
+ gint n_attach_points;
+
+ gchar *display_name;
+};
+
+typedef struct
+{
+ IconThemeDirType type;
+ GQuark context;
+
+ int size;
+ int min_size;
+ int max_size;
+ int threshold;
+
+ char *dir;
+
+ GHashTable *icons;
+ GHashTable *icon_data;
+} IconThemeDir;
+
+typedef struct
+{
+ char *svg_filename;
+ char *no_svg_filename;
+} UnthemedIcon;
+
+typedef struct
+{
+ gint size;
+ GdkPixbuf *pixbuf;
+} BuiltinIcon;
+
+typedef struct
+{
+ char *dir;
+ time_t mtime; /* 0 == not existing or not a dir */
+} IconThemeDirMtime;
+
+static void gtk_icon_theme_class_init (GtkIconThemeClass *klass);
+static void gtk_icon_theme_init (GtkIconTheme *icon_theme);
+static void gtk_icon_theme_finalize (GObject *object);
+static void theme_dir_destroy (IconThemeDir *dir);
+
+static void theme_destroy (IconTheme *theme);
+static GtkIconInfo *theme_lookup_icon (IconTheme *theme,
+ const char *icon_name,
+ int size,
+ gboolean allow_svg,
+ gboolean use_default_icons);
+static void theme_list_icons (IconTheme *theme,
+ GHashTable *icons,
+ GQuark context);
+static void theme_subdir_load (GtkIconTheme *icon_theme,
+ IconTheme *theme,
+ GtkIconThemeFile *theme_file,
+ char *subdir);
+static void do_theme_change (GtkIconTheme *icon_theme);
+
+static void blow_themes (GtkIconTheme *icon_themes);
+
+static void icon_data_free (GtkIconData *icon_data);
+
+static GtkIconInfo *icon_info_new (void);
+static GtkIconInfo *icon_info_new_builtin (BuiltinIcon *icon);
+
+static IconSuffix suffix_from_name (const char *name);
+
+static BuiltinIcon *find_builtin_icon (const gchar *icon_name,
+ gint size,
+ gint *min_difference_p,
+ gboolean *has_larger_p);
+
+static guint signal_changed = 0;
+
+static GHashTable *icon_theme_builtin_icons;
+
+GType
+gtk_icon_theme_get_type (void)
+{
+ static GType type = 0;
+
+ if (type == 0)
+ {
+ static const GTypeInfo info =
+ {
+ sizeof (GtkIconThemeClass),
+ NULL, /* base_init */
+ NULL, /* base_finalize */
+ (GClassInitFunc) gtk_icon_theme_class_init,
+ NULL, /* class_finalize */
+ NULL, /* class_data */
+ sizeof (GtkIconTheme),
+ 0, /* n_preallocs */
+ (GInstanceInitFunc) gtk_icon_theme_init,
+ };
+
+ type = g_type_register_static (G_TYPE_OBJECT, "GtkIconTheme", &info, 0);
+ }
+
+ return type;
+}
+
+/**
+ * gtk_icon_theme_new:
+ *
+ * Creates a new icon theme object. Icon theme objects are used
+ * to lookup up an icon by name in a particular icon theme.
+ * Usually, you'll want to use gtk_icon_theme_get_default()
+ * or gtk_icon_theme_get_for_screen() rather than creating
+ * a new icon theme object for scratch.
+ *
+ * Return value: the newly created #GtkIconTheme object.
+ **/
+GtkIconTheme *
+gtk_icon_theme_new (void)
+{
+ return g_object_new (GTK_TYPE_ICON_THEME, NULL);
+}
+
+/**
+ * gtk_icon_theme_get_default:
+ *
+ * Gets the icon theme for the default screen. See
+ * gtk_icon_theme_get_for_screen().
+ *
+ * Return value: A unique #GtkIconTheme associated with
+ * the default screen. This icon theme is associated with
+ * the screen and can be used as long as the screen
+ * is open.
+ **/
+GtkIconTheme *
+gtk_icon_theme_get_default (void)
+{
+ return gtk_icon_theme_get_for_screen (gdk_screen_get_default ());
+}
+
+/**
+ * gtk_icon_theme_get_for_screen:
+ * @screen: a #GdkScreen
+ *
+ * Gets the icon theme object associated with @screen; if this
+ * function has not previously been called for the given
+ * screen, a new icon theme object will be created and
+ * associated with the screen. Icon theme objects are
+ * fairly expensive to create, so using this function
+ * is usually a better choice than calling than gtk_icon_theme_new()
+ * and setting the screen yourself; by using this function
+ * a single icon theme object will be shared between users.
+ *
+ * Return value: A unique #GtkIconTheme associated with
+ * the given screen. This icon theme is associated with
+ * the screen and can be used as long as the screen
+ * is open.
+ **/
+GtkIconTheme *
+gtk_icon_theme_get_for_screen (GdkScreen *screen)
+{
+ GtkIconTheme *icon_theme;
+
+ g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
+ g_return_val_if_fail (!screen->closed, NULL);
+
+ icon_theme = g_object_get_data (G_OBJECT (screen), "gtk-icon-theme");
+ if (!icon_theme)
+ {
+ GtkIconThemePrivate *priv;
+
+ icon_theme = gtk_icon_theme_new ();
+ gtk_icon_theme_set_screen (icon_theme, screen);
+
+ priv = icon_theme->priv;
+ priv->is_screen_singleton = TRUE;
+
+ g_object_set_data (G_OBJECT (screen), "gtk-icon-theme", icon_theme);
+ }
+
+ return icon_theme;
+}
+
+static void
+gtk_icon_theme_class_init (GtkIconThemeClass *klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+ gobject_class->finalize = gtk_icon_theme_finalize;
+
+/**
+ * GtkIconTheme::changed
+ * @icon_theme: the icon theme
+ *
+ * Emitted when the current icon theme is switched or GTK+ detects
+ * that a change has occurred in the contents of the current
+ * icon theme.
+ **/
+ signal_changed = g_signal_new ("changed",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GtkIconThemeClass, changed),
+ NULL, NULL,
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+
+ g_type_class_add_private (klass, sizeof (GtkIconThemePrivate));
+}
+
+
+/* Callback when the display that the icon theme is attached to
+ * is closed; unset the screen, and if it's the unique theme
+ * for the screen, drop the reference
+ */
+static void
+display_closed (GdkDisplay *display,
+ gboolean is_error,
+ GtkIconTheme *icon_theme)
+{
+ GtkIconThemePrivate *priv = icon_theme->priv;
+ GdkScreen *screen = priv->screen;
+ gboolean was_screen_singleton = priv->is_screen_singleton;
+
+ if (was_screen_singleton)
+ {
+ g_object_set_data (G_OBJECT (screen), "gtk-icon-theme", NULL);
+ priv->is_screen_singleton = FALSE;
+ }
+
+ gtk_icon_theme_set_screen (icon_theme, NULL);
+
+ if (was_screen_singleton)
+ {
+ g_object_unref (icon_theme);
+ }
+}
+
+static void
+update_current_theme (GtkIconTheme *icon_theme)
+{
+ GtkIconThemePrivate *priv = icon_theme->priv;
+
+ if (!priv->custom_theme)
+ {
+ gchar *theme = NULL;
+
+ if (priv->screen)
+ {
+ GtkSettings *settings = gtk_settings_get_for_screen (priv->screen);
+ g_object_get (settings, "gtk-icon-theme-name", &theme, NULL);
+ }
+
+ if (!theme)
+ theme = g_strdup (DEFAULT_THEME_NAME);
+
+ if (strcmp (priv->current_theme, theme) != 0)
+ {
+ g_free (priv->current_theme);
+ priv->current_theme = theme;
+
+ do_theme_change (icon_theme);
+ }
+ else
+ g_free (theme);
+ }
+}
+
+/* Callback when the icon theme GtkSetting changes
+ */
+static void
+theme_changed (GtkSettings *settings,
+ GParamSpec *pspec,
+ GtkIconTheme *icon_theme)
+{
+ update_current_theme (icon_theme);
+}
+
+static void
+unset_screen (GtkIconTheme *icon_theme)
+{
+ GtkIconThemePrivate *priv = icon_theme->priv;
+ GtkSettings *settings;
+ GdkDisplay *display;
+
+ if (priv->screen)
+ {
+ settings = gtk_settings_get_for_screen (priv->screen);
+ display = gdk_screen_get_display (priv->screen);
+
+ g_signal_handlers_disconnect_by_func (display,
+ (gpointer) display_closed,
+ icon_theme);
+ g_signal_handlers_disconnect_by_func (settings,
+ (gpointer) theme_changed,
+ icon_theme);
+
+ priv->screen = NULL;
+ }
+}
+
+/**
+ * gtk_icon_theme_set_screen:
+ * @icon_theme: a #GtkIconTheme
+ * @screen: a #GdkScreen
+ *
+ * Sets the screen for an icon theme; the screen is used
+ * to track the user's currently configured icon theme,
+ * which might be different for different screens.
+ **/
+void
+gtk_icon_theme_set_screen (GtkIconTheme *icon_theme,
+ GdkScreen *screen)
+{
+ GtkIconThemePrivate *priv;
+ GtkSettings *settings;
+ GdkDisplay *display;
+
+ g_return_if_fail (GTK_ICON_THEME (icon_theme));
+ g_return_if_fail (screen == NULL || GDK_IS_SCREEN (screen));
+
+ priv = icon_theme->priv;
+
+ unset_screen (icon_theme);
+
+ if (screen)
+ {
+ display = gdk_screen_get_display (screen);
+ settings = gtk_settings_get_for_screen (screen);
+
+ priv->screen = screen;
+
+ g_signal_connect (display, "closed",
+ G_CALLBACK (display_closed), icon_theme);
+ g_signal_connect (settings, "notify::gtk-icon-theme-name",
+ G_CALLBACK (theme_changed), icon_theme);
+ }
+
+ update_current_theme (icon_theme);
+}
+
+/* Checks whether a loader for SVG files has been registered
+ * with GdkPixbuf.
+ */
+static gboolean
+pixbuf_supports_svg ()
+{
+ GSList *formats = gdk_pixbuf_get_formats ();
+ GSList *tmp_list;
+ gboolean found_svg = FALSE;
+
+ for (tmp_list = formats; tmp_list && !found_svg; tmp_list = tmp_list->next)
+ {
+ gchar **mime_types = gdk_pixbuf_format_get_mime_types (tmp_list->data);
+ gchar **mime_type;
+
+ for (mime_type = mime_types; *mime_type && !found_svg; mime_type++)
+ {
+ if (strcmp (*mime_type, "image/svg") == 0)
+ found_svg = TRUE;
+ }
+
+ g_free (mime_types);
+ }
+
+ g_slist_free (formats);
+
+ return found_svg;
+}
+
+static void
+gtk_icon_theme_init (GtkIconTheme *icon_theme)
+{
+ GtkIconThemePrivate *priv;
+
+ priv = g_type_instance_get_private ((GTypeInstance *)icon_theme,
+ GTK_TYPE_ICON_THEME);
+ icon_theme->priv = priv;
+
+ priv->custom_theme = FALSE;
+ priv->current_theme = g_strdup (DEFAULT_THEME_NAME);
+ priv->search_path = g_new (char *, 5);
+
+
+ priv->search_path[0] = g_build_filename (g_get_home_dir (),
+ ".icons",
+ NULL);
+ priv->search_path[1] = g_strdup (GTK_DATADIR "/pixmaps");
+ priv->search_path[2] = g_strdup (GTK_DATADIR "/icons");
+ priv->search_path[3] = g_strdup ("/usr/share/icons");
+ priv->search_path[4] = g_strdup ("/usr/share/pixmaps");
+ priv->search_path_len = 5;
+
+ priv->themes_valid = FALSE;
+ priv->themes = NULL;
+ priv->unthemed_icons = NULL;
+
+ priv->pixbuf_supports_svg = pixbuf_supports_svg ();
+}
+
+static void
+free_dir_mtime (IconThemeDirMtime *dir_mtime)
+{
+ g_free (dir_mtime->dir);
+ g_free (dir_mtime);
+}
+
+static void
+do_theme_change (GtkIconTheme *icon_theme)
+{
+ GtkIconThemePrivate *priv = icon_theme->priv;
+
+ blow_themes (icon_theme);
+ g_signal_emit (G_OBJECT (icon_theme), signal_changed, 0);
+
+ if (priv->screen && priv->is_screen_singleton)
+ {
+ GtkSettings *settings = gtk_settings_get_for_screen (priv->screen);
+ _gtk_rc_reset_styles (settings);
+ }
+}
+
+static void
+blow_themes (GtkIconTheme *icon_theme)
+{
+ GtkIconThemePrivate *priv = icon_theme->priv;
+
+ if (priv->themes_valid)
+ {
+ g_hash_table_destroy (priv->all_icons);
+ g_list_foreach (priv->themes, (GFunc)theme_destroy, NULL);
+ g_list_free (priv->themes);
+ g_list_foreach (priv->dir_mtimes, (GFunc)free_dir_mtime, NULL);
+ g_list_free (priv->dir_mtimes);
+ g_hash_table_destroy (priv->unthemed_icons);
+ }
+ priv->themes = NULL;
+ priv->unthemed_icons = NULL;
+ priv->dir_mtimes = NULL;
+ priv->all_icons = NULL;
+ priv->themes_valid = FALSE;
+}
+
+static void
+gtk_icon_theme_finalize (GObject *object)
+{
+ GtkIconTheme *icon_theme;
+ GtkIconThemePrivate *priv;
+ int i;
+
+ icon_theme = GTK_ICON_THEME (object);
+ priv = icon_theme->priv;
+
+ unset_screen (icon_theme);
+
+ g_free (priv->current_theme);
+ priv->current_theme = NULL;
+
+ for (i=0; i < priv->search_path_len; i++)
+ g_free (priv->search_path[i]);
+
+ g_free (priv->search_path);
+ priv->search_path = NULL;
+
+ blow_themes (icon_theme);
+}
+
+/**
+ * gtk_icon_theme_set_search_path:
+ * @icon_theme: a #GtkIconTheme
+ * @path: array of directories that are searched for icon themes
+ * @n_elements: number of elements in @path.
+ *
+ * Sets the search path for the icon theme object. When looking
+ * for an icon theme, GTK+ will search for a subdirectory of
+ * one or more of the directories in @path with the same name
+ * as the icon theme. (Themes from multiple of the path elements
+ * are combined to allow themes to be extended by adding icons
+ * in the user's home directory.)
+ *
+ * In addition if an icon found isn't found either in the current
+ * icon theme or the default icon theme, and an image file with
+ * the right name is found directly in one of the elements of
+ * @path, then that image will be used for the icon name.
+ * (This is legacy feature, and new icons should be put
+ * into the default icon theme, which is called "hicolor", rather than
+ * directly on the icon path.)
+ **/
+void
+gtk_icon_theme_set_search_path (GtkIconTheme *icon_theme,
+ const gchar *path[],
+ gint n_elements)
+{
+ GtkIconThemePrivate *priv;
+ gint i;
+
+ g_return_if_fail (GTK_IS_ICON_THEME (icon_theme));
+
+ priv = icon_theme->priv;
+ for (i = 0; i < priv->search_path_len; i++)
+ g_free (priv->search_path[i]);
+
+ g_free (priv->search_path);
+
+ priv->search_path = g_new (gchar *, n_elements);
+ priv->search_path_len = n_elements;
+ for (i = 0; i < priv->search_path_len; i++)
+ priv->search_path[i] = g_strdup (path[i]);
+
+ do_theme_change (icon_theme);
+}
+
+
+/**
+ * gtk_icon_theme_get_search_path:
+ * @icon_theme: a #GtkIconTheme
+ * @path: location to store a list of icon theme path directories or %NULL
+ * The stored value should be freed with g_strfreev().
+ * @n_elements: location to store number of elements
+ * in @path, or %NULL
+ *
+ * Gets the current search path. See gtk_icon_theme_set_search_path().
+ **/
+void
+gtk_icon_theme_get_search_path (GtkIconTheme *icon_theme,
+ gchar **path[],
+ gint *n_elements)
+{
+ GtkIconThemePrivate *priv;
+ int i;
+
+ g_return_if_fail (GTK_IS_ICON_THEME (icon_theme));
+
+ priv = icon_theme->priv;
+
+ if (n_elements)
+ *n_elements = priv->search_path_len;
+
+ if (path)
+ {
+ *path = g_new (gchar *, priv->search_path_len + 1);
+ for (i = 0; i < priv->search_path_len; i++)
+ (*path)[i] = g_strdup (priv->search_path[i] + 1);
+ (*path)[i] = NULL;
+ }
+}
+
+/**
+ * gtk_icon_theme_append_search_path:
+ * @icon_theme: a #GtkIconTheme
+ * @path: directory name to append to the icon path
+ *
+ * Appends a directory to the search path. See gtk_icon_theme_set_search_path().
+ **/
+void
+gtk_icon_theme_append_search_path (GtkIconTheme *icon_theme,
+ const gchar *path)
+{
+ GtkIconThemePrivate *priv;
+
+ g_return_if_fail (GTK_IS_ICON_THEME (icon_theme));
+ g_return_if_fail (path != NULL);
+
+ priv = icon_theme->priv;
+
+ priv->search_path_len++;
+ priv->search_path = g_renew (gchar *, priv->search_path, priv->search_path_len);
+ priv->search_path[priv->search_path_len-1] = g_strdup (path);
+
+ do_theme_change (icon_theme);
+}
+
+/**
+ * gtk_icon_theme_prepend_search_path:
+ * @icon_theme: a #GtkIconTheme
+ * @path: directory name to prepend to the icon path
+ *
+ * Prepends a directory to the search path. See gtk_icon_theme_set_search_path().
+ **/
+void
+gtk_icon_theme_prepend_search_path (GtkIconTheme *icon_theme,
+ const gchar *path)
+{
+ GtkIconThemePrivate *priv;
+ int i;
+
+ g_return_if_fail (GTK_IS_ICON_THEME (icon_theme));
+ g_return_if_fail (path != NULL);
+
+ priv = icon_theme->priv;
+
+ priv->search_path_len++;
+ priv->search_path = g_renew (gchar *, priv->search_path, priv->search_path_len);
+
+ for (i = 0; i < priv->search_path_len - 1; i++)
+ priv->search_path[i+1] = priv->search_path[i];
+
+ priv->search_path[0] = g_strdup (path);
+
+ do_theme_change (icon_theme);
+}
+
+/**
+ * gtk_icon_theme_set_custom_theme:
+ * @icon_theme: a #GtkIconTheme
+ * @theme_name: name of icon theme to use instead of configured theme
+ *
+ * Sets the name of the icon theme that the #GtkIconTheme object uses
+ * overriding system configuration. This function cannot be called
+ * on the icon theme objects returned from gtk_icon_theme_get_default()
+ * and gtk_icon_theme_get_default().
+ **/
+void
+gtk_icon_theme_set_custom_theme (GtkIconTheme *icon_theme,
+ const gchar *theme_name)
+{
+ GtkIconThemePrivate *priv;
+
+ g_return_if_fail (GTK_IS_ICON_THEME (icon_theme));
+
+ priv = icon_theme->priv;
+
+ g_return_if_fail (!priv->is_screen_singleton);
+
+ if (theme_name != NULL)
+ {
+ priv->custom_theme = TRUE;
+ if (strcmp (theme_name, priv->current_theme) != 0)
+ {
+ g_free (priv->current_theme);
+ priv->current_theme = g_strdup (theme_name);
+
+ do_theme_change (icon_theme);
+ }
+ }
+ else
+ {
+ priv->custom_theme = FALSE;
+
+ update_current_theme (icon_theme);
+ }
+}
+
+static void
+insert_theme (GtkIconTheme *icon_theme, const char *theme_name)
+{
+ int i;
+ GList *l;
+ char **dirs;
+ char **themes;
+ GtkIconThemePrivate *priv;
+ IconTheme *theme;
+ char *path;
+ char *contents;
+ char *directories;
+ char *inherits;
+ GtkIconThemeFile *theme_file;
+ IconThemeDirMtime *dir_mtime;
+ struct stat stat_buf;
+
+ priv = icon_theme->priv;
+
+ for (l = priv->themes; l != NULL; l = l->next)
+ {
+ theme = l->data;
+ if (strcmp (theme->name, theme_name) == 0)
+ return;
+ }
+
+ for (i = 0; i < priv->search_path_len; i++)
+ {
+ path = g_build_filename (priv->search_path[i],
+ theme_name,
+ NULL);
+ dir_mtime = g_new (IconThemeDirMtime, 1);
+ dir_mtime->dir = path;
+ if (stat (path, &stat_buf) == 0 && S_ISDIR (stat_buf.st_mode))
+ dir_mtime->mtime = stat_buf.st_mtime;
+ else
+ dir_mtime->mtime = 0;
+
+ priv->dir_mtimes = g_list_prepend (priv->dir_mtimes, dir_mtime);
+ }
+
+ theme_file = NULL;
+ for (i = 0; i < priv->search_path_len; i++)
+ {
+ path = g_build_filename (priv->search_path[i],
+ theme_name,
+ "index.theme",
+ NULL);
+ if (g_file_test (path, G_FILE_TEST_IS_REGULAR)) {
+ if (g_file_get_contents (path, &contents, NULL, NULL)) {
+ theme_file = _gtk_icon_theme_file_new_from_string (contents, NULL);
+ g_free (contents);
+ g_free (path);
+ break;
+ }
+ }
+ g_free (path);
+ }
+
+ if (theme_file == NULL)
+ return;
+
+ theme = g_new (IconTheme, 1);
+ if (!_gtk_icon_theme_file_get_locale_string (theme_file,
+ "Icon Theme",
+ "Name",
+ &theme->display_name))
+ {
+ g_warning ("Theme file for %s has no name\n", theme_name);
+ g_free (theme);
+ _gtk_icon_theme_file_free (theme_file);
+ return;
+ }
+
+ if (!_gtk_icon_theme_file_get_string (theme_file,
+ "Icon Theme",
+ "Directories",
+ &directories))
+ {
+ g_warning ("Theme file for %s has no directories\n", theme_name);
+ g_free (theme->display_name);
+ g_free (theme);
+ _gtk_icon_theme_file_free (theme_file);
+ return;
+ }
+
+ theme->name = g_strdup (theme_name);
+ _gtk_icon_theme_file_get_locale_string (theme_file,
+ "Icon Theme",
+ "Comment",
+ &theme->comment);
+ _gtk_icon_theme_file_get_string (theme_file,
+ "Icon Theme",
+ "Example",
+ &theme->example);
+
+ dirs = g_strsplit (directories, ",", 0);
+
+ theme->dirs = NULL;
+ for (i = 0; dirs[i] != NULL; i++)
+ theme_subdir_load (icon_theme, theme, theme_file, dirs[i]);
+
+ g_strfreev (dirs);
+
+ theme->dirs = g_list_reverse (theme->dirs);
+
+ g_free (directories);
+
+ /* Prepend the finished theme */
+ priv->themes = g_list_prepend (priv->themes, theme);
+
+ if (_gtk_icon_theme_file_get_string (theme_file,
+ "Icon Theme",
+ "Inherits",
+ &inherits))
+ {
+ themes = g_strsplit (inherits, ",", 0);
+
+ for (i = 0; themes[i] != NULL; i++)
+ insert_theme (icon_theme, themes[i]);
+
+ g_strfreev (themes);
+
+ g_free (inherits);
+ }
+
+ _gtk_icon_theme_file_free (theme_file);
+}
+
+static void
+free_unthemed_icon (UnthemedIcon *unthemed_icon)
+{
+ if (unthemed_icon->svg_filename)
+ g_free (unthemed_icon->svg_filename);
+ if (unthemed_icon->svg_filename)
+ g_free (unthemed_icon->no_svg_filename);
+ g_free (unthemed_icon);
+}
+
+static void
+load_themes (GtkIconTheme *icon_theme)
+{
+ GtkIconThemePrivate *priv;
+ GDir *gdir;
+ int base;
+ char *dir, *base_name, *dot;
+ const char *file;
+ char *abs_file;
+ UnthemedIcon *unthemed_icon;
+ IconSuffix old_suffix, new_suffix;
+ struct timeval tv;
+
+ priv = icon_theme->priv;
+
+ priv->all_icons = g_hash_table_new (g_str_hash, g_str_equal);
+
+ insert_theme (icon_theme, priv->current_theme);
+
+ /* Always look in the "default" icon theme */
+ insert_theme (icon_theme, DEFAULT_THEME_NAME);
+ priv->themes = g_list_reverse (priv->themes);
+
+ priv->unthemed_icons = g_hash_table_new_full (g_str_hash, g_str_equal,
+ g_free, (GDestroyNotify)free_unthemed_icon);
+
+ for (base = 0; base < icon_theme->priv->search_path_len; base++)
+ {
+ dir = icon_theme->priv->search_path[base];
+ gdir = g_dir_open (dir, 0, NULL);
+
+ if (gdir == NULL)
+ continue;
+
+ while ((file = g_dir_read_name (gdir)))
+ {
+ new_suffix = suffix_from_name (file);
+
+ if (new_suffix != ICON_SUFFIX_NONE)
+ {
+ abs_file = g_build_filename (dir, file, NULL);
+
+ base_name = g_strdup (file);
+
+ dot = strrchr (base_name, '.');
+ if (dot)
+ *dot = 0;
+
+ if ((unthemed_icon = g_hash_table_lookup (priv->unthemed_icons,
+ base_name)))
+ {
+ if (new_suffix == ICON_SUFFIX_SVG)
+ {
+ if (unthemed_icon->no_svg_filename)
+ g_free (abs_file);
+ else
+ unthemed_icon->svg_filename = abs_file;
+ }
+ else
+ {
+ if (unthemed_icon->no_svg_filename)
+ {
+ old_suffix = suffix_from_name (unthemed_icon->no_svg_filename);
+ if (new_suffix > old_suffix)
+ {
+ g_free (unthemed_icon->no_svg_filename);
+ unthemed_icon->no_svg_filename = abs_file;
+ }
+ else
+ g_free (abs_file);
+ }
+ else
+ unthemed_icon->no_svg_filename = abs_file;
+ }
+
+ g_free (base_name);
+ }
+ else
+ {
+ unthemed_icon = g_new0 (UnthemedIcon, 1);
+
+ if (new_suffix == ICON_SUFFIX_SVG)
+ unthemed_icon->svg_filename = abs_file;
+ else
+ unthemed_icon->svg_filename = abs_file;
+
+ g_hash_table_insert (priv->unthemed_icons,
+ base_name,
+ unthemed_icon);
+ g_hash_table_insert (priv->all_icons,
+ base_name, NULL);
+ }
+ }
+ }
+ g_dir_close (gdir);
+ }
+
+ priv->themes_valid = TRUE;
+
+ gettimeofday(&tv, NULL);
+ priv->last_stat_time = tv.tv_sec;
+}
+
+static void
+ensure_valid_themes (GtkIconTheme *icon_theme)
+{
+ GtkIconThemePrivate *priv = icon_theme->priv;
+ struct timeval tv;
+
+ if (priv->themes_valid)
+ {
+ gettimeofday(&tv, NULL);
+
+ if (ABS (tv.tv_sec - priv->last_stat_time) > 5)
+ gtk_icon_theme_rescan_if_needed (icon_theme);
+ }
+
+ if (!priv->themes_valid)
+ load_themes (icon_theme);
+}
+
+/**
+ * gtk_icon_theme_lookup_icon:
+ * @icon_theme: a #GtkIconTheme
+ * @icon_name: the name of the icon to lookup
+ * @size: desired icon size
+ * @flags: flags modifying the behavior of the icon lookup
+ *
+ * Looks up a named icon and returns a structure containing
+ * information such as the filename of the icon. The icon
+ * can then be rendered into a pixbuf using
+ * gtk_icon_info_load_icon(). (gtk_icon_theme_load_icon()
+ * combines these two steps if all you need is the pixbuf.)
+ *
+ * Return value: a #GtkIconInfo structure containing information
+ * about the icon, or %NULL if the icon wasn't found. Free with
+ * gtk_icon_info_free()
+ **/
+GtkIconInfo *
+gtk_icon_theme_lookup_icon (GtkIconTheme *icon_theme,
+ const gchar *icon_name,
+ gint size,
+ GtkIconLookupFlags flags)
+{
+ GtkIconThemePrivate *priv;
+ GList *l;
+ GtkIconInfo *icon_info = NULL;
+ UnthemedIcon *unthemed_icon;
+ gboolean allow_svg;
+ gboolean use_builtin;
+ gboolean found_default;
+
+ g_return_val_if_fail (GTK_IS_ICON_THEME (icon_theme), NULL);
+ g_return_val_if_fail (icon_name != NULL, NULL);
+ g_return_val_if_fail ((flags & GTK_ICON_LOOKUP_NO_SVG) == 0 ||
+ (flags & GTK_ICON_LOOKUP_FORCE_SVG) == 0, NULL);
+
+ priv = icon_theme->priv;
+
+ if (flags & GTK_ICON_LOOKUP_NO_SVG)
+ allow_svg = FALSE;
+ else if (flags & GTK_ICON_LOOKUP_FORCE_SVG)
+ allow_svg = TRUE;
+ else
+ allow_svg = priv->pixbuf_supports_svg;
+
+ use_builtin = (flags & GTK_ICON_LOOKUP_USE_BUILTIN);
+
+ ensure_valid_themes (icon_theme);
+
+ found_default = FALSE;
+ l = priv->themes;
+ while (l != NULL)
+ {
+ IconTheme *icon_theme = l->data;
+
+ if (strcmp (icon_theme->name, DEFAULT_THEME_NAME) == 0)
+ found_default = TRUE;
+
+ icon_info = theme_lookup_icon (icon_theme, icon_name, size, allow_svg, use_builtin);
+ if (icon_info)
+ goto out;
+
+ l = l->next;
+ }
+
+ if (!found_default)
+ {
+ BuiltinIcon *builtin = find_builtin_icon (icon_name, size, NULL, NULL);
+ if (builtin)
+ {
+ icon_info = icon_info_new_builtin (builtin);
+ goto out;
+ }
+ }
+
+ unthemed_icon = g_hash_table_lookup (priv->unthemed_icons, icon_name);
+ if (unthemed_icon)
+ {
+ icon_info = icon_info_new ();
+
+ /* A SVG icon, when allowed, beats out a XPM icon, but not
+ * a PNG icon
+ */
+ if (allow_svg &&
+ unthemed_icon->svg_filename &&
+ (!unthemed_icon->no_svg_filename ||
+ suffix_from_name (unthemed_icon->no_svg_filename) != ICON_SUFFIX_PNG))
+ icon_info->filename = g_strdup (unthemed_icon->svg_filename);
+ else if (unthemed_icon->no_svg_filename)
+ icon_info->filename = g_strdup (unthemed_icon->no_svg_filename);
+
+ icon_info->dir_type = ICON_THEME_DIR_UNTHEMED;
+ }
+
+ out:
+ if (icon_info)
+ icon_info->desired_size = size;
+
+ return icon_info;
+}
+
+/* Error quark */
+GQuark
+gtk_icon_theme_error_quark (void)
+{
+ static GQuark q = 0;
+ if (q == 0)
+ q = g_quark_from_static_string ("gtk-icon-theme-error-quark");
+
+ return q;
+}
+
+/**
+ * gtk_icon_theme_load_icon:
+ * @icon_theme: a #GtkIconTheme
+ * @icon_name: the name of the icon to lookup
+ * @size: the desired icon size. The resulting icon may not be
+ * exactly this size; see gtk_icon_info_load_icon().
+ * @flags: flags modifying the behavior of the icon lookup
+ * @error: Location to store error information on failure, or %NULL.
+ *
+ * Looks up an icon in an icon theme, scales it to the given size
+ * and renders it into a pixbuf. This is a convenience function;
+ * if more details about the icon are needed, use
+ * gtk_icon_theme_lookup_icon() followed by gtk_icon_info_load_icon().
+ *
+ * Return value: the rendered icon; this may be a newly created icon
+ * or a new reference to an internal icon, so you must not modify
+ * the icon. Use g_object_unref() to release your reference to the
+ * icon. %NULL if the icon isn't found.
+ **/
+GdkPixbuf *
+gtk_icon_theme_load_icon (GtkIconTheme *icon_theme,
+ const gchar *icon_name,
+ gint size,
+ GtkIconLookupFlags flags,
+ GError **error)
+{
+ GtkIconInfo *icon_info;
+ GdkPixbuf *pixbuf = NULL;
+
+ g_return_val_if_fail (GTK_IS_ICON_THEME (icon_theme), NULL);
+ g_return_val_if_fail (icon_name != NULL, NULL);
+ g_return_val_if_fail ((flags & GTK_ICON_LOOKUP_NO_SVG) == 0 ||
+ (flags & GTK_ICON_LOOKUP_FORCE_SVG) == 0, NULL);
+ g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+ icon_info = gtk_icon_theme_lookup_icon (icon_theme, icon_name, size,
+ flags | GTK_ICON_LOOKUP_USE_BUILTIN);
+ if (!icon_info)
+ {
+ g_set_error (error, GTK_ICON_THEME_ERROR, GTK_ICON_THEME_NOT_FOUND,
+ _("Icon '%s' not present in theme"), icon_name);
+ return NULL;
+ }
+
+ pixbuf = gtk_icon_info_load_icon (icon_info, error);
+ gtk_icon_info_free (icon_info);
+
+ return pixbuf;
+}
+
+/**
+ * gtk_icon_theme_has_icon:
+ * @icon_theme: a #GtkIconTheme
+ * @icon_name: the name of an icon
+ *
+ * Checks whether an icon theme includes an icon
+ * for a particular name.
+ *
+ * Return value: %TRUE if @icon_theme includes an
+ * icon for @icon_name.
+ **/
+gboolean
+gtk_icon_theme_has_icon (GtkIconTheme *icon_theme,
+ const char *icon_name)
+{
+ GtkIconThemePrivate *priv;
+
+ g_return_val_if_fail (GTK_IS_ICON_THEME (icon_theme), FALSE);
+
+ priv = icon_theme->priv;
+
+ ensure_valid_themes (icon_theme);
+
+ if (g_hash_table_lookup_extended (priv->all_icons,
+ icon_name, NULL, NULL))
+ return TRUE;
+ if (g_hash_table_lookup_extended (icon_theme_builtin_icons,
+ icon_name, NULL, NULL))
+ return TRUE;
+
+ return FALSE;
+}
+
+
+static void
+add_key_to_hash (gpointer key,
+ gpointer value,
+ gpointer user_data)
+{
+ GHashTable *hash = user_data;
+
+ g_hash_table_insert (hash, key, NULL);
+}
+
+static void
+add_key_to_list (gpointer key,
+ gpointer value,
+ gpointer user_data)
+{
+ GList **list = user_data;
+
+ *list = g_list_prepend (*list, g_strdup (key));
+}
+
+/**
+ * gtk_icon_theme_list_icons:
+ * @icon_theme: a #GtkIconTheme
+ * @context: a string identifying a particular type of icon,
+ * or %NULL to list all icons.
+ *
+ * Lists the icons in the current icon theme. Only a subset
+ * of the icons can be listed by providing a context string.
+ * The set of values for the context string is system dependent,
+ * but will typically include such values as 'apps' and
+ * 'mimetypes'.
+ *
+ * Return value: a #GList list holding the names of all the
+ * icons in the theme. You must first free each element
+ * in the list with g_free(), then free the list itself
+ * with g_list_free().
+ **/
+GList *
+gtk_icon_theme_list_icons (GtkIconTheme *icon_theme,
+ const char *context)
+{
+ GtkIconThemePrivate *priv;
+ GHashTable *icons;
+ GList *list, *l;
+ GQuark context_quark;
+
+ priv = icon_theme->priv;
+
+ ensure_valid_themes (icon_theme);
+
+ if (context)
+ {
+ context_quark = g_quark_try_string (context);
+
+ if (!context_quark)
+ return NULL;
+ }
+ else
+ context_quark = 0;
+
+ icons = g_hash_table_new (g_str_hash, g_str_equal);
+
+ l = priv->themes;
+ while (l != NULL)
+ {
+ theme_list_icons (l->data, icons, context_quark);
+ l = l->next;
+ }
+
+ if (context_quark == 0)
+ g_hash_table_foreach (priv->unthemed_icons,
+ add_key_to_hash,
+ icons);
+
+ list = 0;
+
+ g_hash_table_foreach (icons,
+ add_key_to_list,
+ &list);
+
+ g_hash_table_destroy (icons);
+
+ return list;
+}
+
+/**
+ * gtk_icon_theme_get_example_icon_name:
+ * @icon_theme: a #GtkIconTheme
+ *
+ * Gets the name of an icon that is representative of the
+ * current theme (for instance, to use when presenting
+ * a list of themes to the user.)
+ *
+ * Return value: the name of an example icon or %NULL.
+ * Free with g_free().
+ **/
+char *
+gtk_icon_theme_get_example_icon_name (GtkIconTheme *icon_theme)
+{
+ GtkIconThemePrivate *priv;
+ GList *l;
+ IconTheme *theme;
+
+ g_return_val_if_fail (GTK_IS_ICON_THEME (icon_theme), NULL);
+
+ priv = icon_theme->priv;
+
+ ensure_valid_themes (icon_theme);
+
+ l = priv->themes;
+ while (l != NULL)
+ {
+ theme = l->data;
+ if (theme->example)
+ return g_strdup (theme->example);
+
+ l = l->next;
+ }
+
+ return NULL;
+}
+
+/**
+ * gtk_icon_theme_rescan_if_needed:
+ * @icon_theme: a #GtkIconTheme
+ *
+ * Checks to see if the icon theme has changed; if it has, any
+ * currently cached information is discarded and will be reloaded
+ * next time @icon_theme is accessed.
+ *
+ * Return value: %TRUE if the icon theme has changed and needed
+ * to be reloaded.
+ **/
+gboolean
+gtk_icon_theme_rescan_if_needed (GtkIconTheme *icon_theme)
+{
+ GtkIconThemePrivate *priv;
+ IconThemeDirMtime *dir_mtime;
+ GList *d;
+ int stat_res;
+ struct stat stat_buf;
+ struct timeval tv;
+
+ g_return_val_if_fail (GTK_IS_ICON_THEME (icon_theme), FALSE);
+
+ priv = icon_theme->priv;
+
+ for (d = priv->dir_mtimes; d != NULL; d = d->next)
+ {
+ dir_mtime = d->data;
+
+ stat_res = stat (dir_mtime->dir, &stat_buf);
+
+ /* dir mtime didn't change */
+ if (stat_res == 0 &&
+ S_ISDIR (stat_buf.st_mode) &&
+ dir_mtime->mtime == stat_buf.st_mtime)
+ continue;
+ /* didn't exist before, and still doesn't */
+ if (dir_mtime->mtime == 0 &&
+ (stat_res != 0 || !S_ISDIR (stat_buf.st_mode)))
+ continue;
+
+ do_theme_change (icon_theme);
+ return TRUE;
+ }
+
+ gettimeofday (&tv, NULL);
+ priv->last_stat_time = tv.tv_sec;
+
+ return FALSE;
+}
+
+static void
+theme_destroy (IconTheme *theme)
+{
+ g_free (theme->display_name);
+ g_free (theme->comment);
+ g_free (theme->name);
+ g_free (theme->example);
+
+ g_list_foreach (theme->dirs, (GFunc)theme_dir_destroy, NULL);
+ g_list_free (theme->dirs);
+ g_free (theme);
+}
+
+static void
+theme_dir_destroy (IconThemeDir *dir)
+{
+ g_hash_table_destroy (dir->icons);
+ if (dir->icon_data)
+ g_hash_table_destroy (dir->icon_data);
+ g_free (dir->dir);
+ g_free (dir);
+}
+
+static int
+theme_dir_size_difference (IconThemeDir *dir, int size, gboolean *smaller)
+{
+ int min, max;
+ switch (dir->type)
+ {
+ case ICON_THEME_DIR_FIXED:
+ *smaller = size < dir->size;
+ return abs (size - dir->size);
+ break;
+ case ICON_THEME_DIR_SCALABLE:
+ *smaller = size < dir->min_size;
+ if (size < dir->min_size)
+ return dir->min_size - size;
+ if (size > dir->max_size)
+ return size - dir->max_size;
+ return 0;
+ break;
+ case ICON_THEME_DIR_THRESHOLD:
+ min = dir->size - dir->threshold;
+ max = dir->size + dir->threshold;
+ *smaller = size < min;
+ if (size < min)
+ return min - size;
+ if (size > max)
+ return size - max;
+ return 0;
+ break;
+ case ICON_THEME_DIR_UNTHEMED:
+ g_assert_not_reached ();
+ break;
+ }
+ g_assert_not_reached ();
+ return 1000;
+}
+
+static const char *
+string_from_suffix (IconSuffix suffix)
+{
+ switch (suffix)
+ {
+ case ICON_SUFFIX_XPM:
+ return ".xpm";
+ case ICON_SUFFIX_SVG:
+ return ".svg";
+ case ICON_SUFFIX_PNG:
+ return ".png";
+ default:
+ g_assert_not_reached();
+ }
+ return NULL;
+}
+
+static IconSuffix
+suffix_from_name (const char *name)
+{
+ IconSuffix retval;
+
+ if (g_str_has_suffix (name, ".png"))
+ retval = ICON_SUFFIX_PNG;
+ else if (g_str_has_suffix (name, ".svg"))
+ retval = ICON_SUFFIX_SVG;
+ else if (g_str_has_suffix (name, ".xpm"))
+ retval = ICON_SUFFIX_XPM;
+ else
+ retval = ICON_SUFFIX_NONE;
+
+ return retval;
+}
+
+static IconSuffix
+best_suffix (IconSuffix suffix,
+ gboolean allow_svg)
+{
+ if ((suffix & ICON_SUFFIX_PNG) != 0)
+ return ICON_SUFFIX_PNG;
+ else if (allow_svg && ((suffix & ICON_SUFFIX_SVG) != 0))
+ return ICON_SUFFIX_SVG;
+ else if ((suffix & ICON_SUFFIX_XPM) != 0)
+ return ICON_SUFFIX_XPM;
+ else
+ return ICON_SUFFIX_NONE;
+}
+
+static GtkIconInfo *
+theme_lookup_icon (IconTheme *theme,
+ const char *icon_name,
+ int size,
+ gboolean allow_svg,
+ gboolean use_builtin)
+{
+ GList *l;
+ IconThemeDir *dir, *min_dir;
+ char *file;
+ int min_difference, difference;
+ BuiltinIcon *closest_builtin = NULL;;
+ gboolean smaller, has_larger;
+ IconSuffix suffix;
+
+ min_difference = G_MAXINT;
+ min_dir = NULL;
+ has_larger = FALSE;
+
+ /* Builtin icons are logically part of the default theme and
+ * are searched before other subdirectories of the default theme.
+ */
+ if (strcmp (theme->name, DEFAULT_THEME_NAME) == 0 && use_builtin)
+ {
+ closest_builtin = find_builtin_icon (icon_name, size,
+ &min_difference,
+ &has_larger);
+
+ if (min_difference == 0)
+ return icon_info_new_builtin (closest_builtin);
+ }
+
+ l = theme->dirs;
+ while (l != NULL)
+ {
+ dir = l->data;
+
+ suffix = GPOINTER_TO_UINT (g_hash_table_lookup (dir->icons, icon_name));
+
+ if (suffix != ICON_SUFFIX_NONE &&
+ (allow_svg || suffix != ICON_SUFFIX_SVG))
+ {
+ difference = theme_dir_size_difference (dir, size, &smaller);
+
+ if (difference == 0)
+ {
+ min_dir = dir;
+ break;
+ }
+
+ if (!has_larger)
+ {
+ if (difference < min_difference || smaller)
+ {
+ min_difference = difference;
+ min_dir = dir;
+ closest_builtin = NULL;
+ has_larger = smaller;
+ }
+ }
+ else
+ {
+ if (difference < min_difference && smaller)
+ {
+ min_difference = difference;
+ min_dir = dir;
+ closest_builtin = NULL;
+ }
+ }
+
+ }
+
+ l = l->next;
+ }
+
+ if (closest_builtin)
+ return icon_info_new_builtin (closest_builtin);
+
+ if (min_dir)
+ {
+ GtkIconInfo *icon_info = icon_info_new ();
+
+ suffix = GPOINTER_TO_UINT (g_hash_table_lookup (min_dir->icons, icon_name));
+ suffix = best_suffix (suffix, allow_svg);
+ g_assert (suffix != ICON_SUFFIX_NONE);
+
+ file = g_strconcat (icon_name, string_from_suffix (suffix), NULL);
+ icon_info->filename = g_build_filename (min_dir->dir, file, NULL);
+ g_free (file);
+
+ if (min_dir->icon_data != NULL)
+ icon_info->data = g_hash_table_lookup (min_dir->icon_data, icon_name);
+
+ icon_info->dir_type = min_dir->type;
+ icon_info->dir_size = min_dir->size;
+ icon_info->threshold = min_dir->threshold;
+
+ return icon_info;
+ }
+
+ return NULL;
+}
+
+static void
+theme_list_icons (IconTheme *theme, GHashTable *icons,
+ GQuark context)
+{
+ GList *l = theme->dirs;
+ IconThemeDir *dir;
+
+ while (l != NULL)
+ {
+ dir = l->data;
+
+ if (context == dir->context ||
+ context == 0)
+ g_hash_table_foreach (dir->icons,
+ add_key_to_hash,
+ icons);
+
+ l = l->next;
+ }
+}
+
+static void
+load_icon_data (IconThemeDir *dir, const char *path, const char *name)
+{
+ GtkIconThemeFile *icon_file;
+ char *base_name;
+ char **split;
+ char *contents;
+ char *dot;
+ char *str;
+ char *split_point;
+ int i;
+
+ GtkIconData *data;
+
+ if (g_file_get_contents (path, &contents, NULL, NULL))
+ {
+ icon_file = _gtk_icon_theme_file_new_from_string (contents, NULL);
+
+ if (icon_file)
+ {
+ base_name = g_strdup (name);
+ dot = strrchr (base_name, '.');
+ *dot = 0;
+
+ data = g_new0 (GtkIconData, 1);
+ g_hash_table_replace (dir->icon_data, base_name, data);
+
+ if (_gtk_icon_theme_file_get_string (icon_file, "Icon Data",
+ "EmbeddedTextRectangle",
+ &str))
+ {
+ split = g_strsplit (str, ",", 4);
+
+ i = 0;
+ while (split[i] != NULL)
+ i++;
+
+ if (i==4)
+ {
+ data->has_embedded_rect = TRUE;
+ data->x0 = atoi (split[0]);
+ data->y0 = atoi (split[1]);
+ data->x1 = atoi (split[2]);
+ data->y1 = atoi (split[3]);
+ }
+
+ g_strfreev (split);
+ g_free (str);
+ }
+
+
+ if (_gtk_icon_theme_file_get_string (icon_file, "Icon Data",
+ "AttachPoints",
+ &str))
+ {
+ split = g_strsplit (str, "|", -1);
+
+ i = 0;
+ while (split[i] != NULL)
+ i++;
+
+ data->n_attach_points = i;
+ data->attach_points = g_malloc (sizeof (GdkPoint) * i);
+
+ i = 0;
+ while (split[i] != NULL && i < data->n_attach_points)
+ {
+ split_point = strchr (split[i], ',');
+ if (split_point)
+ {
+ *split_point = 0;
+ split_point++;
+ data->attach_points[i].x = atoi (split[i]);
+ data->attach_points[i].y = atoi (split_point);
+ }
+ i++;
+ }
+
+ g_strfreev (split);
+ g_free (str);
+ }
+
+ _gtk_icon_theme_file_get_locale_string (icon_file, "Icon Data",
+ "DisplayName",
+ &data->display_name);
+
+ _gtk_icon_theme_file_free (icon_file);
+ }
+ g_free (contents);
+ }
+
+}
+
+static void
+scan_directory (GtkIconThemePrivate *icon_theme,
+ IconThemeDir *dir, char *full_dir)
+{
+ GDir *gdir;
+ const char *name;
+ char *base_name, *dot;
+ char *path;
+ IconSuffix suffix, hash_suffix;
+
+ dir->icons = g_hash_table_new_full (g_str_hash, g_str_equal,
+ g_free, NULL);
+
+ gdir = g_dir_open (full_dir, 0, NULL);
+
+ if (gdir == NULL)
+ return;
+
+ while ((name = g_dir_read_name (gdir)))
+ {
+ if (g_str_has_suffix (name, ".icon"))
+ {
+ if (dir->icon_data == NULL)
+ dir->icon_data = g_hash_table_new_full (g_str_hash, g_str_equal,
+ g_free, (GDestroyNotify)icon_data_free);
+
+ path = g_build_filename (full_dir, name, NULL);
+ if (g_file_test (path, G_FILE_TEST_IS_REGULAR))
+ load_icon_data (dir, path, name);
+
+ g_free (path);
+
+ continue;
+ }
+
+ suffix = suffix_from_name (name);
+ if (suffix == ICON_SUFFIX_NONE)
+ continue;
+
+ base_name = g_strdup (name);
+ dot = strrchr (base_name, '.');
+ *dot = 0;
+
+ hash_suffix = GPOINTER_TO_INT (g_hash_table_lookup (dir->icons, base_name));
+ g_hash_table_replace (dir->icons, base_name, GUINT_TO_POINTER (hash_suffix| suffix));
+ g_hash_table_insert (icon_theme->all_icons, base_name, NULL);
+ }
+
+ g_dir_close (gdir);
+}
+
+static void
+theme_subdir_load (GtkIconTheme *icon_theme,
+ IconTheme *theme,
+ GtkIconThemeFile *theme_file,
+ char *subdir)
+{
+ int base;
+ char *type_string;
+ IconThemeDir *dir;
+ IconThemeDirType type;
+ char *context_string;
+ GQuark context;
+ int size;
+ int min_size;
+ int max_size;
+ int threshold;
+ char *full_dir;
+
+ if (!_gtk_icon_theme_file_get_integer (theme_file,
+ subdir,
+ "Size",
+ &size))
+ {
+ g_warning ("Theme directory %s of theme %s has no size field\n", subdir, theme->name);
+ return;
+ }
+
+ type = ICON_THEME_DIR_THRESHOLD;
+ if (_gtk_icon_theme_file_get_string (theme_file, subdir, "Type", &type_string))
+ {
+ if (strcmp (type_string, "Fixed") == 0)
+ type = ICON_THEME_DIR_FIXED;
+ else if (strcmp (type_string, "Scalable") == 0)
+ type = ICON_THEME_DIR_SCALABLE;
+ else if (strcmp (type_string, "Threshold") == 0)
+ type = ICON_THEME_DIR_THRESHOLD;
+
+ g_free (type_string);
+ }
+
+ context = 0;
+ if (_gtk_icon_theme_file_get_string (theme_file, subdir, "Context", &context_string))
+ {
+ context = g_quark_from_string (context_string);
+ g_free (context_string);
+ }
+
+ if (!_gtk_icon_theme_file_get_integer (theme_file,
+ subdir,
+ "MaxSize",
+ &max_size))
+ max_size = size;
+
+ if (!_gtk_icon_theme_file_get_integer (theme_file,
+ subdir,
+ "MinSize",
+ &min_size))
+ min_size = size;
+
+ if (!_gtk_icon_theme_file_get_integer (theme_file,
+ subdir,
+ "Threshold",
+ &threshold))
+ threshold = 2;
+
+ for (base = 0; base < icon_theme->priv->search_path_len; base++)
+ {
+ full_dir = g_build_filename (icon_theme->priv->search_path[base],
+ theme->name,
+ subdir,
+ NULL);
+ if (g_file_test (full_dir, G_FILE_TEST_IS_DIR))
+ {
+ dir = g_new (IconThemeDir, 1);
+ dir->type = type;
+ dir->context = context;
+ dir->size = size;
+ dir->min_size = min_size;
+ dir->max_size = max_size;
+ dir->threshold = threshold;
+ dir->dir = full_dir;
+ dir->icon_data = NULL;
+
+ scan_directory (icon_theme->priv, dir, full_dir);
+
+ theme->dirs = g_list_append (theme->dirs, dir);
+ }
+ else
+ g_free (full_dir);
+ }
+}
+
+static void
+icon_data_free (GtkIconData *icon_data)
+{
+ g_free (icon_data->attach_points);
+ g_free (icon_data->display_name);
+ g_free (icon_data);
+}
+
+/*
+ * GtkIconInfo
+ */
+GType
+gtk_icon_info_get_type (void)
+{
+ static GType our_type = 0;
+
+ if (our_type == 0)
+ our_type = g_boxed_type_register_static ("GtkIconInfo",
+ (GBoxedCopyFunc) gtk_icon_info_copy,
+ (GBoxedFreeFunc) gtk_icon_info_free);
+
+ return our_type;
+}
+
+static GtkIconInfo *
+icon_info_new (void)
+{
+ GtkIconInfo *icon_info = g_new0 (GtkIconInfo, 1);
+
+ icon_info->ref_count = 1;
+ icon_info->scale = -1.;
+
+ return icon_info;
+}
+
+static GtkIconInfo *
+icon_info_new_builtin (BuiltinIcon *icon)
+{
+ GtkIconInfo *icon_info = icon_info_new ();
+
+ icon_info->builtin_pixbuf = g_object_ref (icon->pixbuf);
+ icon_info->dir_type = ICON_THEME_DIR_THRESHOLD;
+ icon_info->dir_size = icon->size;
+ icon_info->threshold = 2;
+
+ return icon_info;
+}
+
+/**
+ * gtk_icon_info_copy:
+ * @icon_info: a #GtkIconInfo
+ *
+ * Make a copy of a #GtkIconInfo.
+ *
+ * Return value: the new GtkIconInfo
+ **/
+GtkIconInfo *
+gtk_icon_info_copy (GtkIconInfo *icon_info)
+{
+ GtkIconInfo *copy;
+
+ g_return_val_if_fail (icon_info != NULL, NULL);
+
+ copy = g_memdup (icon_info, sizeof (GtkIconInfo));
+ if (copy->builtin_pixbuf)
+ g_object_ref (copy->builtin_pixbuf);
+ if (copy->pixbuf)
+ g_object_ref (copy->pixbuf);
+ if (copy->load_error)
+ copy->load_error = g_error_copy (copy->load_error);
+ if (copy->filename)
+ copy->filename = g_strdup (copy->filename);
+
+ return copy;
+}
+
+/**
+ * gtk_icon_info_free:
+ * @icon_info: a #GtkIconInfo
+ *
+ * Free a #GtkIconInfo and associated information
+ **/
+void
+gtk_icon_info_free (GtkIconInfo *icon_info)
+{
+ g_return_if_fail (icon_info != NULL);
+
+ if (icon_info->filename)
+ g_free (icon_info->filename);
+ if (icon_info->builtin_pixbuf)
+ g_object_unref (icon_info->builtin_pixbuf);
+ if (icon_info->pixbuf)
+ g_object_unref (icon_info->pixbuf);
+
+ g_free (icon_info);
+}
+
+/**
+ * gtk_icon_info_get_base_size:
+ * @icon_info: a #GtkIconInfo
+ *
+ * Gets the base size for the icon. The base size
+ * is a size for the icon that was specified by
+ * the icon theme creator. This may be different
+ * than the actual size of image; an example of
+ * this is small emblem icons that can be attached
+ * to a larger icon. These icons will be given
+ * the same base size as the larger icons to which
+ * they are attached.
+ *
+ * Return value: the base size, or 0, if no base
+ * size is known for the icon.
+ **/
+gint
+gtk_icon_info_get_base_size (GtkIconInfo *icon_info)
+{
+ g_return_val_if_fail (icon_info != NULL, 0);
+
+ return icon_info->dir_size;
+}
+
+/**
+ * gtk_icon_info_get_filename:
+ * @icon_info: a #GtkIconInfo
+ *
+ * Gets the filename for the icon. If the
+ * %GTK_ICON_LOOKUP_USE_BUILTIN flag was passed
+ * to gtk_icon_theme_lookup_icon(), there may be
+ * no filename if a builtin icon is returned; in this
+ * case, you should use gtk_icon_info_get_builtin_pixbuf().
+ *
+ * Return value: the filename for the icon, or %NULL
+ * if gtk_icon_info_get_builtin_pixbuf() should
+ * be used instead. The return value is owned by
+ * GTK+ and should not be modified or freed.
+ **/
+G_CONST_RETURN gchar *
+gtk_icon_info_get_filename (GtkIconInfo *icon_info)
+{
+ g_return_val_if_fail (icon_info != NULL, NULL);
+
+ return icon_info->filename;
+}
+
+/**
+ * gtk_icon_info_get_builtin_pixbuf:
+ * @icon_info: a #GtkIconInfo structure
+ *
+ * Gets the built-in image for this icon, if any. To allow
+ * GTK+ to use built in icon images, you must pass the
+ * %GTK_ICON_LOOKUP_USE_BUILTIN to
+ * gtk_icon_theme_lookup_icon().
+ *
+ * Return value: the built-in image pixbuf, or %NULL. No
+ * extra reference is added to the returned pixbuf, so if
+ * you want to keep it around, you must use g_object_ref().
+ * The returned image must not be modified.
+ **/
+GdkPixbuf *
+gtk_icon_info_get_builtin_pixbuf (GtkIconInfo *icon_info)
+{
+ g_return_val_if_fail (icon_info != NULL, NULL);
+
+ return icon_info->builtin_pixbuf;
+}
+
+static GdkPixbuf *
+load_svg_at_size (const gchar *filename,
+ gint size,
+ GError **error)
+{
+ GdkPixbuf *pixbuf = NULL;
+ GdkPixbufLoader *loader = NULL;
+ gchar *contents;
+ gsize length;
+
+ if (!g_file_get_contents (filename,
+ &contents, &length, error))
+ goto bail;
+
+ loader = gdk_pixbuf_loader_new ();
+ gdk_pixbuf_loader_set_size (loader, size, size);
+
+ if (!gdk_pixbuf_loader_write (loader, contents, length, error))
+ {
+ gdk_pixbuf_loader_close (loader, NULL);
+ goto bail;
+ }
+
+ if (!gdk_pixbuf_loader_close (loader, error))
+ goto bail;
+
+ pixbuf = g_object_ref (gdk_pixbuf_loader_get_pixbuf (loader));
+
+ bail:
+ if (loader)
+ g_object_unref (loader);
+
+ return pixbuf;
+}
+
+/* This function contains the complicatd logic for deciding
+ * on the size at which to load the icon and loading it at
+ * that size.
+ */
+static gboolean
+icon_info_ensure_scale_and_pixbuf (GtkIconInfo *icon_info,
+ gboolean scale_only)
+{
+ int image_width, image_height;
+ GdkPixbuf *source_pixbuf;
+
+ /* First check if we already succeeded have the necessary
+ * information (or failed earlier)
+ */
+ if (scale_only && icon_info->scale >= 0)
+ return TRUE;
+
+ if (icon_info->pixbuf)
+ return TRUE;
+
+ if (icon_info->load_error)
+ return FALSE;
+
+ /* SVG icons are a special case - we just immediately scale them
+ * to the desired size
+ */
+ if (icon_info->filename && g_str_has_suffix (icon_info->filename, ".svg"))
+ {
+ icon_info->scale = icon_info->desired_size / 1000.;
+
+ if (scale_only)
+ return TRUE;
+
+ icon_info->pixbuf = load_svg_at_size (icon_info->filename,
+ icon_info->desired_size,
+ &icon_info->load_error);
+
+ return icon_info->pixbuf != NULL;
+ }
+
+ /* In many cases, the scale can be determined without actual access
+ * to the icon file. This is generally true when we have a size
+ * for the directory where the icon is; the image size doesn't
+ * matter in that case.
+ */
+ if (icon_info->dir_type == ICON_THEME_DIR_FIXED)
+ icon_info->scale = 1.0;
+ else if (icon_info->dir_type == ICON_THEME_DIR_THRESHOLD)
+ {
+ if (icon_info->desired_size >= icon_info->dir_size - icon_info->threshold &&
+ icon_info->desired_size <= icon_info->dir_size + icon_info->threshold)
+ icon_info->scale = 1.0;
+ else if (icon_info->dir_size > 0)
+ icon_info->scale =(gdouble) icon_info->desired_size / icon_info->dir_size;
+ }
+ else if (icon_info->dir_type == ICON_THEME_DIR_SCALABLE)
+ {
+ if (icon_info->dir_size > 0)
+ icon_info->scale = (gdouble) icon_info->desired_size / icon_info->dir_size;
+ }
+
+ if (icon_info->scale >= 0. && scale_only)
+ return TRUE;
+
+ /* At this point, we need to actually get the icon; either from the
+ * builting image or by loading the file
+ */
+ if (icon_info->builtin_pixbuf)
+ source_pixbuf = g_object_ref (icon_info->builtin_pixbuf);
+ else
+ {
+ source_pixbuf = gdk_pixbuf_new_from_file (icon_info->filename,
+ &icon_info->load_error);
+ if (!source_pixbuf)
+ return FALSE;
+ }
+
+ /* Do scale calculations that depend on the image size
+ */
+ image_width = gdk_pixbuf_get_width (source_pixbuf);
+ image_height = gdk_pixbuf_get_height (source_pixbuf);
+
+ if (icon_info->scale < 0.0)
+ {
+ gint image_size = MAX (image_width, image_height);
+ if (image_size > 0)
+ icon_info->scale = icon_info->desired_size / image_size;
+ else
+ icon_info->scale = 1.0;
+
+ if (icon_info->dir_type == ICON_THEME_DIR_UNTHEMED)
+ icon_info->scale = MAX (icon_info->scale, 1.0);
+ }
+
+ /* We don't short-circuit out here for scale_only, since, now
+ * we've loaded the icon, we might as well go ahead and finish
+ * the job. This is a bit of a waste when we scale here
+ * and never get the final pixbuf; at the cost of a bit of
+ * extra complexity, we could keep the source pixbuf around
+ * but not actually scale it until neede.
+ */
+
+ if (icon_info->scale == 1.0)
+ icon_info->pixbuf = source_pixbuf;
+ else
+ {
+ icon_info->pixbuf = gdk_pixbuf_scale_simple (source_pixbuf,
+ 0.5 + image_width * icon_info->scale,
+ 0.5 + image_height * icon_info->scale,
+ GDK_INTERP_BILINEAR);
+ g_object_unref (source_pixbuf);
+ }
+
+ return TRUE;
+}
+
+/**
+ * gtk_icon_info_load_icon:
+ * @icon_info: a #GtkIconInfo structure from gtk_icon_theme_lookup_icon()
+ * @error:
+ *
+ * Renders an icon previously looked up in an icon theme using
+ * gtk_icon_theme_lookup_icon(); the size will be based on the size
+ * pssed to gtk_icon_theme_lookup_icon(). Note that the resulting
+ * pixbuf may not be exactly this size; an icon theme may have icons
+ * that differ slightly from their nominal sizes, and in addition GTK+
+ * will avoid scaling icons that it considers sufficiently close to the
+ * requested size. (This maintains sharpness.)
+ *
+ * Return value: the rendered icon; this may be a newly created icon
+ * or a new reference to an internal icon, so you must not modify
+ * the icon. Use g_object_unref() to release your reference to the
+ * icon.
+ **/
+GdkPixbuf *
+gtk_icon_info_load_icon (GtkIconInfo *icon_info,
+ GError **error)
+{
+ g_return_val_if_fail (icon_info != NULL, NULL);
+
+ g_return_val_if_fail (icon_info != NULL, NULL);
+ g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+ icon_info_ensure_scale_and_pixbuf (icon_info, FALSE);
+
+ if (icon_info->load_error)
+ {
+ g_propagate_error (error, icon_info->load_error);
+ return NULL;
+ }
+
+ return g_object_ref (icon_info->pixbuf);
+}
+
+/**
+ * gtk_icon_info_set_raw_coordinates:
+ * @icon_info: a #GtkIconInfo
+ * @raw_coordinates: whether the coordinates of embedded rectangles
+ * and attached points should be returned in their original
+ * (unscaled) form.
+ *
+ * Sets whether the coordinates returned by gtk_icon_info_get_embedded_rect()
+ * and gtk_icon_info_get_attach_points() should be returned in their
+ * original form as specified in the icon theme, instead of scaled
+ * appropriately for the pixbuf returned by gtk_icon_info_load_icon().
+ *
+ * Raw coordinates are somewhat strange; they are specified to be with
+ * respect to the unscaled pixmap for PNG and XPM icons, but for SVG
+ * icons, they are in a 1000x1000 coordinate space that is scaled
+ * to the final size of the icon. You can determine if the icon is an SVG
+ * icon by using gtk_icon_info_get_filename(), and seeing if it is non-%NULL
+ * and ends in '.svg'.
+ *
+ * This function is provided primarily to allow compatibility wrappers
+ * for older API's, and is not expected to be useful for applications.
+ **/
+void
+gtk_icon_info_set_raw_coordinates (GtkIconInfo *icon_info,
+ gboolean raw_coordinates)
+{
+ g_return_if_fail (icon_info != NULL);
+
+ icon_info->raw_coordinates = raw_coordinates != FALSE;
+}
+
+/* Scale coordinates from the icon data prior to returning
+ * them to the user.
+ */
+static gboolean
+icon_info_scale_point (GtkIconInfo *icon_info,
+ gint x,
+ gint y,
+ gint *x_out,
+ gint *y_out)
+{
+ if (icon_info->raw_coordinates)
+ {
+ *x_out = x;
+ *y_out = y;
+ }
+ else
+ {
+ if (!icon_info_ensure_scale_and_pixbuf (icon_info, TRUE))
+ return FALSE;
+
+ *x_out = 0.5 + x * icon_info->scale;
+ *y_out = 0.5 + y * icon_info->scale;
+ }
+
+ return TRUE;
+}
+
+/**
+ * gtk_icon_info_get_embedded_rect:
+ * @icon_info: a #GtkIconInfo
+ * @rectangle: #GdkRectangle in which to store embedded
+ * rectangle coordinates; coordinates are only stored
+ * when this function returns %TRUE.
+ *
+ * Gets the coordinates of a rectangle within the icon
+ * that can be used for display of information such
+ * as a preview of the contents of a text file.
+ * See gtk_icon_info_set_raw_coordinates() for further
+ * information about the coordinate system.
+ *
+ * Return value: %TRUE if the icon has an embedded rectangle
+ **/
+gboolean
+gtk_icon_info_get_embedded_rect (GtkIconInfo *icon_info,
+ GdkRectangle *rectangle)
+{
+ g_return_val_if_fail (icon_info != NULL, FALSE);
+
+ if (icon_info->data && icon_info->data->has_embedded_rect &&
+ icon_info_ensure_scale_and_pixbuf (icon_info, TRUE))
+ {
+ gint scaled_x0, scaled_y0;
+ gint scaled_x1, scaled_y1;
+
+ if (rectangle)
+ {
+ icon_info_scale_point (icon_info,
+ icon_info->data->x0, icon_info->data->y0,
+ &scaled_x0, &scaled_y0);
+ icon_info_scale_point (icon_info,
+ icon_info->data->x0, icon_info->data->y0,
+ &scaled_x1, &scaled_y1);
+
+ rectangle->x = scaled_x0;
+ rectangle->y = scaled_y0;
+ rectangle->width = scaled_x1 - rectangle->x;
+ rectangle->height = scaled_y1 - rectangle->y;
+ }
+
+ return TRUE;
+ }
+ else
+ return FALSE;
+}
+
+/**
+ * gtk_icon_info_get_attach_points:
+ * @icon_info: a #GtkIconInfo
+ * @points: location to store pointer to an array of points, or %NULL
+ * free the array of points with g_free().
+ * @n_points: location to store the number of points in @points, or %NULL
+ *
+ * Fetches the set of attach points for an icon. An attach point
+ * is a location in the icon that can be used as anchor points for attaching
+ * emblems or overlays to the icon.
+ *
+ * Return value: %TRUE if there are any attach points for the icon.
+ **/
+gboolean
+gtk_icon_info_get_attach_points (GtkIconInfo *icon_info,
+ GdkPoint **points,
+ gint *n_points)
+{
+ g_return_val_if_fail (icon_info != NULL, FALSE);
+
+ if (icon_info->data && icon_info->data->n_attach_points &&
+ icon_info_ensure_scale_and_pixbuf (icon_info, TRUE))
+ {
+ if (points)
+ {
+ gint i;
+
+ *points = g_new (GdkPoint, icon_info->data->n_attach_points);
+ for (i = 0; i < icon_info->data->n_attach_points; i++)
+ icon_info_scale_point (icon_info,
+ icon_info->data->attach_points[i].x,
+ icon_info->data->attach_points[i].y,
+ &(*points)[i].x,
+ &(*points)[i].y);
+ }
+
+ if (n_points)
+ *n_points = icon_info->data->n_attach_points;
+
+ return TRUE;
+ }
+ else
+ {
+ if (points)
+ *points = NULL;
+ if (n_points)
+ *n_points = 0;
+
+ return FALSE;
+ }
+}
+
+/**
+ * gtk_icon_info_get_display_name:
+ * @icon_info: a #GtkIconInfo
+ *
+ * Gets the display name for an icon. A display name is a
+ * string to be used in place of the icon name in a user
+ * visible context like a list of icons.
+ *
+ * Return value: the display name for the icon or %NULL, if
+ * the icon doesn't have a specified display name. This value
+ * is owned @icon_info and must not be modified or free.
+ **/
+G_CONST_RETURN gchar *
+gtk_icon_info_get_display_name (GtkIconInfo *icon_info)
+{
+ g_return_val_if_fail (icon_info != NULL, NULL);
+
+ if (icon_info->data)
+ return icon_info->data->display_name;
+ else
+ return NULL;
+}
+
+/*
+ * Builtin icons
+ */
+
+
+/**
+ * gtk_icon_theme_add_builtin_icon:
+ * @icon_name: the name of the icon to register
+ * @size: the size at which to register the icon (different
+ * images can be registered for the same icon name
+ * at different sizes.)
+ * @pixbuf: #GdkPixbuf that contains the image to use
+ * for @icon_name.
+ *
+ * Registers a built-in icon for icon theme lookups. The idea
+ * of built-in icons is to allow an application or library
+ * that uses themed icons to function requiring files to
+ * be present in the file system. For instance, the default
+ * images for all of GTK+'s stock icons are registered
+ * as built-icons.
+ *
+ * In general, if you use gtk_icon_theme_add_builtin_icon()
+ * you should also install the icon in the icon theme, so
+ * that the icon is generally available.
+ *
+ * This function will generally be used with pixbufs loaded
+ * via gdk_pixbuf_new_from_inline ().
+ **/
+void
+gtk_icon_theme_add_builtin_icon (const gchar *icon_name,
+ gint size,
+ GdkPixbuf *pixbuf)
+{
+ BuiltinIcon *default_icon;
+ GSList *icons;
+ gpointer key;
+
+ g_return_if_fail (icon_name != NULL);
+ g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
+
+ if (!icon_theme_builtin_icons)
+ icon_theme_builtin_icons = g_hash_table_new (g_str_hash, g_str_equal);
+
+ icons = g_hash_table_lookup (icon_theme_builtin_icons, icon_name);
+ if (!icons)
+ key = g_strdup (icon_name);
+ else
+ key = (gpointer)icon_name; /* Won't get stored */
+
+ default_icon = g_new (BuiltinIcon, 1);
+ default_icon->size = size;
+ default_icon->pixbuf = g_object_ref (pixbuf);
+ icons = g_slist_prepend (icons, default_icon);
+
+ /* Replaces value, leaves key untouched
+ */
+ g_hash_table_insert (icon_theme_builtin_icons, key, icons);
+}
+
+/* Look up a builtin icon; the min_difference_p and
+ * has_larger_p out parameters allow us to combine
+ * this lookup with searching through the actual directories
+ * of the "hicolor" icon theme. See theme_lookup_icon()
+ * for how they are used.
+ */
+static BuiltinIcon *
+find_builtin_icon (const gchar *icon_name,
+ gint size,
+ gint *min_difference_p,
+ gboolean *has_larger_p)
+{
+ GSList *icons = NULL;
+ gint min_difference = G_MAXINT;
+ gboolean has_larger = FALSE;
+ BuiltinIcon *min_icon = NULL;
+
+ if (!icon_theme_builtin_icons)
+ return NULL;
+
+ icons = g_hash_table_lookup (icon_theme_builtin_icons, icon_name);
+
+ while (icons)
+ {
+ BuiltinIcon *default_icon = icons->data;
+ int min, max, difference;
+ gboolean smaller;
+
+ min = default_icon->size - 2;
+ max = default_icon->size + 2;
+ smaller = size < min;
+ if (size < min)
+ difference = min - size;
+ if (size > max)
+ difference = size - max;
+ else
+ difference = 0;
+
+ if (difference == 0)
+ {
+ min_icon = default_icon;
+ break;
+ }
+
+ if (!has_larger)
+ {
+ if (difference < min_difference || smaller)
+ {
+ min_difference = difference;
+ min_icon = default_icon;
+ has_larger = smaller;
+ }
+ }
+ else
+ {
+ if (difference < min_difference && smaller)
+ {
+ min_difference = difference;
+ min_icon = default_icon;
+ }
+ }
+
+ icons = icons->next;
+ }
+
+ if (min_difference_p)
+ *min_difference_p = min_difference;
+ if (has_larger_p)
+ *has_larger_p = has_larger;
+
+ return min_icon;
+}