static struct css_select_handler svgtiny_select_handler;
+/* Every call to svgtiny_select_style() needs this, so let's only make
+ * one copy. */
+static const css_media media_all = {
+ .type = CSS_MEDIA_ALL,
+};
+
+/**
+ * Convenient wrapper around css_select_style()
+ *
+ * \param state The current state of the libsvgtiny parser
+ * \param node The node that we're getting styles for
+ * \param inline_sheet The inline stylesheet for the given node
+ * \param result Address at which to store the results array
+ */
+css_error svgtiny_select_style(struct svgtiny_parse_state *state,
+ dom_element *node,
+ const css_stylesheet *inline_sheet,
+ css_select_results **result)
+{
+ return css_select_style(state->select_ctx,
+ node,
+ &state->unit_ctx,
+ &media_all,
+ inline_sheet,
+ &svgtiny_select_handler,
+ state,
+ result);
+}
+
/**
* Resolve a relative URL to an absolute one by doing nothing. This is
* the simplest possible implementation of a URL resolver, needed for
/**
* User-agent defaults for CSS properties
*
- * For the moment, we provide no defaults, because libsvgtiny does not
- * yet support any CSS properties that might need them.
+ * Ideally we would provide _no_ defaults here, because we don't yet
+ * support any CSS properties that can use them. However, we run into
+ * libcss parent/child style composition issues unless these defaults
+ * are provided. And it's harmless to provide them, so let's do it.
*
* \param pw Pointer to the current SVG parser state; unused
* \param property LibCSS property identifier; unused
css_hint *hint)
{
UNUSED(pw);
- UNUSED(property);
- UNUSED(hint);
- return CSS_INVALID;
+ switch (property) {
+ case CSS_PROP_COLOR:
+ hint->data.color = 0xff000000;
+ hint->status = CSS_COLOR_COLOR;
+ break;
+ case CSS_PROP_FONT_FAMILY:
+ hint->data.strings = NULL;
+ hint->status = CSS_FONT_FAMILY_SANS_SERIF;
+ break;
+ case CSS_PROP_QUOTES:
+ hint->data.strings = NULL;
+ hint->status = CSS_QUOTES_NONE;
+ break;
+ case CSS_PROP_VOICE_FAMILY:
+ hint->data.strings = NULL;
+ hint->status = 0;
+ break;
+ default:
+ return CSS_INVALID;
+ }
+
+ return CSS_OK;
}
+/**
+ * A "user handler" function that we pass to dom_node_set_user_data()
+ * in set_libcss_node_data(). The set_libcss_node_data() documentation
+ * says that if the node (on which data is set) is is deleted or
+ * cloned, or if its ancestors are modified, then we must call
+ * css_libcss_node_data_handler() on the user data. This function
+ * basically just checks to see which DOM event has happened and
+ * calls css_libcss_node_data_handler() when any of those criteria
+ * are met.
+ */
+static void svgtiny_dom_user_data_handler(dom_node_operation operation,
+ dom_string *key, void *data, struct dom_node *src,
+ struct dom_node *dst)
+{
+ /* We only care about the userdata that is identified by our
+ * userdata key. Unfortunately I see no obvious way to obtain
+ * the copy of the userdata key that is already interned in
+ * svgtiny_strings.h; so we duplicate it here (ugh). */
+ dom_string *str;
+ dom_string_create((const uint8_t *)"_libcss_user_data", 17, &str);
+ if (dom_string_isequal(str,key) == false || data == NULL) {
+ /* Wrong key, or no data */
+ return;
+ }
+
+ /* Check the DOM operation, and make the corresponding call to
+ * css_libcss_node_data_handler(). No error handling is done.
+ */
+ switch (operation) {
+ case DOM_NODE_CLONED:
+ css_libcss_node_data_handler(&svgtiny_select_handler,
+ CSS_NODE_CLONED,
+ NULL, src, dst, data);
+ break;
+ case DOM_NODE_RENAMED:
+ css_libcss_node_data_handler(&svgtiny_select_handler,
+ CSS_NODE_MODIFIED,
+ NULL, src, NULL, data);
+ break;
+ case DOM_NODE_IMPORTED:
+ case DOM_NODE_ADOPTED:
+ case DOM_NODE_DELETED:
+ css_libcss_node_data_handler(&svgtiny_select_handler,
+ CSS_NODE_DELETED,
+ NULL, src, NULL, data);
+ default:
+ /* Our list of cases should have been exhaustive */
+ assert(false);
+ }
+}
+
/**
* Store libcss data on a node
*
void *old_data;
/* A unique "userdata key" (a string) is used to identify this
- * data. The fourth parameter (NULL) is a "user handler
- * function." We will eventually have one, but for now we set
- * it to NULL to avoid a circular reference mess that would
- * break the build temporarily. */
+ * data. */
state = (struct svgtiny_parse_state *)pw;
dom_node_set_user_data((dom_node *)node,
state->interned_userdata_key,
libcss_node_data,
- NULL,
+ svgtiny_dom_user_data_handler,
&old_data);
/* dom_node_set_user_data() always returns DOM_NO_ERR */
set_libcss_node_data,
get_libcss_node_data,
};
+
+
projects / libsvgtiny.git / blobdiff