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icontheme: Avoid creating useless IconThemeDirs

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We were allocating IconThemeDir instances and then only later assign a
value to has_icons. In the !has_icons case, we were directly throwing
the IconThemeDir away again.

Delay allocating the IconThemeDirs until we know that it has icons.
This avoids allocating and then de-allocating around 1400 IconThemeDir
instances when opening the widget-factory.
This commit is contained in:
Timm Bäder 2019-09-01 10:04:32 +02:00
parent 0b472c23d7
commit b65d9ca955
1 changed files with 42 additions and 23 deletions
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65
gtk/gtkicontheme.c
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@ -2983,13 +2983,13 @@ theme_list_contexts (IconTheme *theme,
}
}
static gboolean
scan_directory (GtkIconThemePrivate *icon_theme,
IconThemeDir *dir,
gchar *full_dir)
static GHashTable *
scan_directory (GtkIconThemePrivate *icon_theme,
char *full_dir)
{
GDir *gdir;
const gchar *name;
GHashTable *icons = NULL;
GTK_DISPLAY_NOTE (icon_theme->display, ICONTHEME,
g_message ("scanning directory %s", full_dir));
@ -2997,9 +2997,7 @@ scan_directory (GtkIconThemePrivate *icon_theme,
gdir = g_dir_open (full_dir, 0, NULL);
if (gdir == NULL)
return FALSE;
dir->icons = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
return NULL;
while ((name = g_dir_read_name (gdir)))
{
@ -3010,16 +3008,19 @@ scan_directory (GtkIconThemePrivate *icon_theme,
if (suffix == ICON_SUFFIX_NONE)
continue;
if (!icons)
icons = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
base_name = strip_suffix (name);
hash_suffix = GPOINTER_TO_INT (g_hash_table_lookup (dir->icons, base_name));
hash_suffix = GPOINTER_TO_INT (g_hash_table_lookup (icons, base_name));
/* takes ownership of base_name */
g_hash_table_replace (dir->icons, base_name, GUINT_TO_POINTER (hash_suffix|suffix));
g_hash_table_replace (icons, base_name, GUINT_TO_POINTER (hash_suffix|suffix));
}
g_dir_close (gdir);
return g_hash_table_size (dir->icons) > 0;
return icons;
}
static void
@ -3042,7 +3043,6 @@ theme_subdir_load (GtkIconTheme *icon_theme,
GError *error = NULL;
IconThemeDirMtime *dir_mtime;
gint scale;
gboolean has_icons;
size = g_key_file_get_integer (theme_file, subdir, "Size", &error);
if (error)
@ -3052,7 +3052,7 @@ theme_subdir_load (GtkIconTheme *icon_theme,
subdir, theme->name);
return;
}
type = ICON_THEME_DIR_THRESHOLD;
type_string = g_key_file_get_string (theme_file, subdir, "Type", NULL);
if (type_string)
@ -3066,7 +3066,7 @@ theme_subdir_load (GtkIconTheme *icon_theme,
g_free (type_string);
}
context = 0;
context_string = g_key_file_get_string (theme_file, subdir, "Context", NULL);
if (context_string)
@ -3107,12 +3107,35 @@ theme_subdir_load (GtkIconTheme *icon_theme,
/* First, see if we have a cache for the directory */
if (dir_mtime->cache != NULL || g_file_test (full_dir, G_FILE_TEST_IS_DIR))
{
gboolean has_icons;
GtkIconCache *dir_cache;
GHashTable *icon_table = NULL;
if (dir_mtime->cache == NULL)
{
/* This will return NULL if the cache doesn't exist or is outdated */
dir_mtime->cache = gtk_icon_cache_new_for_path (dir_mtime->dir);
}
if (dir_mtime->cache != NULL)
{
dir_cache = dir_mtime->cache;
has_icons = gtk_icon_cache_has_icons (dir_cache, subdir);
}
else
{
dir_cache = NULL;
icon_table = scan_directory (icon_theme->priv, full_dir);
has_icons = icon_table != NULL;
}
if (!has_icons)
{
g_assert (!icon_table);
g_free (full_dir);
continue;
}
dir = g_new0 (IconThemeDir, 1);
dir->type = type;
dir->is_resource = FALSE;
@ -3124,24 +3147,20 @@ theme_subdir_load (GtkIconTheme *icon_theme,
dir->dir = full_dir;
dir->subdir = g_strdup (subdir);
dir->scale = scale;
dir->icons = icon_table;
if (dir_mtime->cache != NULL)
if (dir_cache)
{
dir->cache = gtk_icon_cache_ref (dir_mtime->cache);
dir->cache = gtk_icon_cache_ref (dir_cache);
dir->subdir_index = gtk_icon_cache_get_directory_index (dir->cache, dir->subdir);
has_icons = gtk_icon_cache_has_icons (dir->cache, dir->subdir);
}
else
{
dir->cache = NULL;
dir_cache = NULL;
dir->subdir_index = -1;
has_icons = scan_directory (icon_theme->priv, dir, full_dir);
}
if (has_icons)
theme->dirs = g_list_prepend (theme->dirs, dir);
else
theme_dir_destroy (dir);
theme->dirs = g_list_prepend (theme->dirs, dir);
}
else
g_free (full_dir);