/* 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 #include #include #include #include #include #include #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_strfreev (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; }