Clean up code to find themes
Simplify code to find the right theme to load and loading it by moving all the loading code into a load_theme() helper function, and making meta_load_theme() use that as it searches through the directories. Look for old-version themes even when loading relative to the working in debug mode. Don't unnecessarily duplicate and then free info->theme_file and info->theme_dir. http://bugzilla.gnome.org/show_bug.cgi?id=592503
This commit is contained in:
Owen W. Taylor
parent
94d47dc25e
commit
0ac46316af
@ -82,8 +82,8 @@ typedef struct
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GSList *states;
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const char *theme_name; /* name of theme (directory it's in) */
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char *theme_file; /* theme filename */
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char *theme_dir; /* dir the theme is inside */
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const char *theme_file; /* theme filename */
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const char *theme_dir; /* dir the theme is inside */
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MetaTheme *theme; /* theme being parsed */
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guint format_version; /* version of format of theme file */
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char *name; /* name of named thing being parsed */
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@ -272,9 +272,6 @@ parse_info_init (ParseInfo *info)
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static void
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parse_info_free (ParseInfo *info)
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{
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g_free (info->theme_file);
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g_free (info->theme_dir);
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g_slist_free (info->states);
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if (info->theme)
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@ -3880,66 +3877,131 @@ text_handler (GMarkupParseContext *context,
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#define METACITY_THEME_FILENAME_FORMAT "metacity-theme-%d.xml"
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/* If the theme is not-corrupt, keep looking for alternate versions
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* in other locations we might be compatible with
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*/
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static gboolean
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theme_error_is_fatal (GError *error)
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{
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return error->domain != G_FILE_ERROR;
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}
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static MetaTheme *
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load_theme (const char *theme_dir,
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const char *theme_name,
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guint major_version,
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GError **error)
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{
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GMarkupParseContext *context;
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ParseInfo info;
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char *text;
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gsize length;
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char *theme_filename;
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char *theme_file;
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MetaTheme *retval;
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g_return_val_if_fail (error && *error == NULL, NULL);
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text = NULL;
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retval = NULL;
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context = NULL;
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theme_filename = g_strdup_printf (METACITY_THEME_FILENAME_FORMAT, major_version);
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theme_file = g_build_filename (theme_dir, theme_filename, NULL);
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if (!g_file_get_contents (theme_file,
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&text,
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&length,
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error))
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goto out;
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meta_topic (META_DEBUG_THEMES, "Parsing theme file %s\n", theme_file);
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parse_info_init (&info);
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info.theme_name = theme_name;
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info.theme_file = theme_file;
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info.theme_dir = theme_dir;
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info.format_version = major_version;
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context = g_markup_parse_context_new (&metacity_theme_parser,
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0, &info, NULL);
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if (!g_markup_parse_context_parse (context,
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text,
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length,
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error))
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goto out;
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if (!g_markup_parse_context_end_parse (context, error))
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goto out;
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retval = info.theme;
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info.theme = NULL;
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out:
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if (*error && !theme_error_is_fatal (*error))
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{
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meta_topic (META_DEBUG_THEMES, "Failed to read theme from file %s: %s\n",
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theme_file, (*error)->message);
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}
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g_free (theme_filename);
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g_free (theme_file);
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g_free (text);
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if (context)
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{
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g_markup_parse_context_free (context);
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parse_info_free (&info);
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}
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return retval;
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}
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static gboolean
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keep_trying (GError **error)
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{
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if (*error && !theme_error_is_fatal (*error))
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{
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g_clear_error (error);
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return TRUE;
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}
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return FALSE;
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}
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MetaTheme*
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meta_theme_load (const char *theme_name,
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GError **err)
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{
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GMarkupParseContext *context;
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GError *error;
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ParseInfo info;
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char *text;
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gsize length;
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char *theme_file;
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GError *error = NULL;
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char *theme_dir;
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MetaTheme *retval;
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guint version;
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const gchar* const* xdg_data_dirs;
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int version;
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int i;
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text = NULL;
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length = 0;
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retval = NULL;
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context = NULL;
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theme_dir = NULL;
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theme_file = NULL;
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if (meta_is_debugging ())
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{
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gchar *theme_filename = g_strdup_printf (METACITY_THEME_FILENAME_FORMAT,
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THEME_VERSION);
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/* Try in themes in our source tree */
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/* We try all supported major versions from current to oldest */
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for (version = THEME_VERSION; (version > 0); version--)
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{
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theme_dir = g_build_filename ("./themes", theme_name, NULL);
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theme_file = g_build_filename (theme_dir,
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theme_filename,
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NULL);
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error = NULL;
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if (!g_file_get_contents (theme_file,
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&text,
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&length,
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&error))
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{
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meta_topic (META_DEBUG_THEMES, "Failed to read theme from file %s: %s\n",
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theme_file, error->message);
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g_error_free (error);
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retval = load_theme (theme_dir, theme_name, version, &error);
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g_free (theme_dir);
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g_free (theme_file);
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theme_file = NULL;
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if (!keep_trying (&error))
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goto out;
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}
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version = THEME_VERSION;
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g_free (theme_filename);
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}
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/* We try all supported versions from current to oldest */
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for (version = THEME_VERSION; (version > 0) && (text == NULL); version--)
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/* We try all supported major versions from current to oldest */
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for (version = THEME_VERSION; (version > 0); version--)
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{
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gchar *theme_filename = g_strdup_printf (METACITY_THEME_FILENAME_FORMAT,
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version);
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/* We try first in home dir, XDG_DATA_DIRS, then system dir for themes */
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/* Try home dir for themes */
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@ -3949,29 +4011,14 @@ meta_theme_load (const char *theme_name,
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THEME_SUBDIR,
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NULL);
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theme_file = g_build_filename (theme_dir,
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theme_filename,
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NULL);
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error = NULL;
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if (!g_file_get_contents (theme_file,
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&text,
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&length,
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&error))
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{
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meta_topic (META_DEBUG_THEMES, "Failed to read theme from file %s: %s\n",
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theme_file, error->message);
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g_error_free (error);
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retval = load_theme (theme_dir, theme_name, version, &error);
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g_free (theme_dir);
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g_free (theme_file);
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theme_file = NULL;
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}
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if (!keep_trying (&error))
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goto out;
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/* Try each XDG_DATA_DIRS for theme */
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xdg_data_dirs = g_get_system_data_dirs();
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for(i = 0; xdg_data_dirs[i] != NULL; i++)
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{
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if (text == NULL)
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{
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theme_dir = g_build_filename (xdg_data_dirs[i],
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"themes",
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@ -3979,125 +4026,35 @@ meta_theme_load (const char *theme_name,
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THEME_SUBDIR,
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NULL);
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theme_file = g_build_filename (theme_dir,
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theme_filename,
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NULL);
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error = NULL;
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if (!g_file_get_contents (theme_file,
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&text,
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&length,
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&error))
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{
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meta_topic (META_DEBUG_THEMES, "Failed to read theme from file %s: %s\n",
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theme_file, error->message);
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g_error_free (error);
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retval = load_theme (theme_dir, theme_name, version, &error);
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g_free (theme_dir);
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g_free (theme_file);
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theme_file = NULL;
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}
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else
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{
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break;
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}
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}
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if (!keep_trying (&error))
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goto out;
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}
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/* Look for themes in MUTTER_DATADIR */
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if (text == NULL)
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{
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theme_dir = g_build_filename (MUTTER_DATADIR,
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"themes",
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theme_name,
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THEME_SUBDIR,
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NULL);
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theme_file = g_build_filename (theme_dir,
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theme_filename,
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NULL);
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error = NULL;
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if (!g_file_get_contents (theme_file,
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&text,
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&length,
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&error))
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{
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meta_topic (META_DEBUG_THEMES, "Failed to read theme from file %s: %s\n",
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theme_file, error->message);
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g_error_free (error);
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retval = load_theme (theme_dir, theme_name, version, &error);
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g_free (theme_dir);
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g_free (theme_file);
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theme_file = NULL;
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}
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}
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g_free (theme_filename);
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}
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if (text == NULL)
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{
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g_set_error (err, META_THEME_ERROR, META_THEME_ERROR_FAILED,
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_("Failed to find a valid file for theme %s\n"),
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theme_name);
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return NULL; /* all fallbacks failed */
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}
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meta_topic (META_DEBUG_THEMES, "Parsing theme file %s\n", theme_file);
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parse_info_init (&info);
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info.theme_name = theme_name;
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/* pass ownership to info so we free it with the info */
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info.theme_file = theme_file;
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info.theme_dir = theme_dir;
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info.format_version = version + 1;
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context = g_markup_parse_context_new (&metacity_theme_parser,
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0, &info, NULL);
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error = NULL;
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if (!g_markup_parse_context_parse (context,
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text,
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length,
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&error))
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goto out;
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error = NULL;
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if (!g_markup_parse_context_end_parse (context, &error))
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goto out;
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if (!keep_trying (&error))
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goto out;
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}
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out:
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if (context)
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g_markup_parse_context_free (context);
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g_free (text);
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if (info.theme)
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info.theme->format_version = info.format_version;
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if (!error && !retval)
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g_set_error (&error, META_THEME_ERROR, META_THEME_ERROR_FAILED,
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_("Failed to find a valid file for theme %s\n"),
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theme_name);
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if (error)
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{
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g_propagate_error (err, error);
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}
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else if (info.theme)
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{
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/* Steal theme from info */
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retval = info.theme;
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info.theme = NULL;
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}
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else
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{
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g_set_error (err, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
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_("Theme file %s did not contain a root <metacity_theme> element"),
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info.theme_file);
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}
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parse_info_free (&info);
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return retval;
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}
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