Add functions to dynamically load/unload stylesheets
For implementing extensions, we want the ability to add a stylesheet dynamically, and unload it as well. https://bugzilla.gnome.org/show_bug.cgi?id=599661
This commit is contained in:
Colin Walters
parent
368d484dee
commit
b6cc9c7ff6
@ -44,6 +44,8 @@
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#include <stdlib.h>
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#include <string.h>
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#include <gio/gio.h>
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#include "st-theme-node.h"
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#include "st-theme-private.h"
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@ -68,6 +70,7 @@ struct _StTheme
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char *application_stylesheet;
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char *default_stylesheet;
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char *theme_stylesheet;
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GSList *custom_stylesheets;
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GHashTable *stylesheets_by_filename;
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GHashTable *filenames_by_stylesheet;
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@ -193,24 +196,19 @@ convert_rgba_RGBA (char *buf)
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}
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static CRStyleSheet *
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parse_stylesheet (const char *filename)
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parse_stylesheet (const char *filename,
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GError **error)
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{
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enum CRStatus status;
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char *contents;
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gsize length;
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GError *error = NULL;
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CRStyleSheet *stylesheet = NULL;
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if (filename == NULL)
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return NULL;
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if (!g_file_get_contents (filename, &contents ,&length, &error))
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{
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g_warning("Couldn't read stylesheet: %s", error->message);
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g_error_free (error);
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return NULL;
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}
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if (!g_file_get_contents (filename, &contents, &length, error))
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return NULL;
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convert_rgba_RGBA (contents);
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@ -218,11 +216,14 @@ parse_stylesheet (const char *filename)
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length,
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CR_UTF_8,
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&stylesheet);
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g_free (contents);
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if (status != CR_OK)
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g_warning ("Error parsing stylesheet '%s'", filename);
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g_free (contents);
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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"Error parsing stylesheet '%s'; errcode:%d", filename, status);
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return NULL;
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}
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return stylesheet;
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}
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@ -243,7 +244,8 @@ _st_theme_parse_declaration_list (const char *str)
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}
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#else /* LIBCROCO_VERSION_NUMBER >= 602 */
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static CRStyleSheet *
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parse_stylesheet (const char *filename)
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parse_stylesheet (const char *filename,
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GError **error)
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{
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enum CRStatus status;
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CRStyleSheet *stylesheet;
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@ -257,7 +259,8 @@ parse_stylesheet (const char *filename)
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if (status != CR_OK)
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{
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g_warning ("Error parsing stylesheet '%s'", filename);
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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"Error parsing stylesheet '%s'; errcode:%d", filename, status);
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return NULL;
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}
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@ -272,6 +275,22 @@ _st_theme_parse_declaration_list (const char *str)
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}
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#endif /* LIBCROCO_VERSION_NUMBER < 602 */
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/* Just g_warning for now until we have something nicer to do */
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static CRStyleSheet *
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parse_stylesheet_nofail (const char *filename)
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{
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GError *error = NULL;
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CRStyleSheet *result;
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result = parse_stylesheet (filename, &error);
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if (error)
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{
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g_warning ("%s", error->message);
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g_clear_error (&error);
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}
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return result;
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}
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static void
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insert_stylesheet (StTheme *theme,
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const char *filename,
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@ -289,6 +308,42 @@ insert_stylesheet (StTheme *theme,
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g_hash_table_insert (theme->filenames_by_stylesheet, stylesheet, filename_copy);
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}
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gboolean
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st_theme_load_stylesheet (StTheme *theme,
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const char *path,
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GError **error)
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{
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CRStyleSheet *stylesheet;
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stylesheet = parse_stylesheet (path, error);
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if (!stylesheet)
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return FALSE;
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insert_stylesheet (theme, path, stylesheet);
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theme->custom_stylesheets = g_slist_prepend (theme->custom_stylesheets, stylesheet);
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return TRUE;
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}
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void
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st_theme_unload_stylesheet (StTheme *theme,
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const char *path)
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{
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CRStyleSheet *stylesheet;
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stylesheet = g_hash_table_lookup (theme->stylesheets_by_filename, path);
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if (!stylesheet)
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return;
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if (!g_slist_find (theme->custom_stylesheets, stylesheet))
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return;
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theme->custom_stylesheets = g_slist_remove (theme->custom_stylesheets, stylesheet);
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g_hash_table_remove (theme->stylesheets_by_filename, path);
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g_hash_table_remove (theme->filenames_by_stylesheet, stylesheet);
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cr_stylesheet_unref (stylesheet);
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}
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static GObject *
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st_theme_constructor (GType type,
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guint n_construct_properties,
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@ -305,9 +360,9 @@ st_theme_constructor (GType type,
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construct_properties);
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theme = ST_THEME (object);
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application_stylesheet = parse_stylesheet (theme->application_stylesheet);
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theme_stylesheet = parse_stylesheet (theme->theme_stylesheet);
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default_stylesheet = parse_stylesheet (theme->default_stylesheet);
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application_stylesheet = parse_stylesheet_nofail (theme->application_stylesheet);
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theme_stylesheet = parse_stylesheet_nofail (theme->theme_stylesheet);
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default_stylesheet = parse_stylesheet_nofail (theme->default_stylesheet);
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theme->cascade = cr_cascade_new (application_stylesheet,
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theme_stylesheet,
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@ -328,6 +383,10 @@ st_theme_finalize (GObject * object)
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{
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StTheme *theme = ST_THEME (object);
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g_slist_foreach (theme->custom_stylesheets, (GFunc) cr_stylesheet_unref, NULL);
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g_slist_free (theme->custom_stylesheets);
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theme->custom_stylesheets = NULL;
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g_hash_table_destroy (theme->stylesheets_by_filename);
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g_hash_table_destroy (theme->filenames_by_stylesheet);
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@ -559,6 +618,7 @@ id_add_sel_matches_style (CRAdditionalSel *a_add_sel,
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}
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/**
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*additional_selector_matches_style:
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*Evaluates if a given additional selector matches an style node.
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*@param a_add_sel the additional selector to consider.
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*@param a_node the style node to consider.
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@ -862,7 +922,7 @@ add_matched_properties (StTheme *a_this,
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import_rule->url->stryng->str);
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if (filename)
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import_rule->sheet = parse_stylesheet (filename);
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import_rule->sheet = parse_stylesheet (filename, NULL);
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if (import_rule->sheet)
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{
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@ -980,6 +1040,7 @@ _st_theme_get_matched_properties (StTheme *theme,
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enum CRStyleOrigin origin = 0;
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CRStyleSheet *sheet = NULL;
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GPtrArray *props = g_ptr_array_new ();
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GSList *iter;
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g_return_val_if_fail (ST_IS_THEME (theme), NULL);
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g_return_val_if_fail (ST_IS_THEME_NODE (node), NULL);
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@ -993,6 +1054,9 @@ _st_theme_get_matched_properties (StTheme *theme,
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add_matched_properties (theme, sheet, node, props);
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}
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for (iter = theme->custom_stylesheets; iter; iter = iter->next)
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add_matched_properties (theme, iter->data, node, props);
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/* We count on a stable sort here so that later declarations come
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* after earlier declarations */
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g_ptr_array_sort (props, compare_declarations);
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@ -33,6 +33,10 @@ StTheme *st_theme_new (const char *application_stylesheet,
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const char *theme_stylesheet,
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const char *default_stylesheet);
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gboolean st_theme_load_stylesheet (StTheme *theme, const char *path, GError **error);
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void st_theme_unload_stylesheet (StTheme *theme, const char *path);
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G_END_DECLS
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#endif /* __ST_THEME_H__ */
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