X-Git-Url: https://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=src%2Fsvgtiny_css.c;h=a5a75214a57239d3bbfb150768dc1611531007ae;hb=aa4b2d7b7b628407f6361c6b5c5a4ad2b0176877;hp=f01c3b40df17ca066611aec5a3458c8d6d104bd2;hpb=2d9df164155af9c43959aa5fb0f7465454b33839;p=libsvgtiny.git diff --git a/src/svgtiny_css.c b/src/svgtiny_css.c index f01c3b4..a5a7521 100644 --- a/src/svgtiny_css.c +++ b/src/svgtiny_css.c @@ -4,10 +4,13 @@ #include "svgtiny.h" #include "svgtiny_internal.h" +/* select handler callbacks */ static css_error node_name(void *pw, void *node, css_qname *qname); static css_error node_classes(void *pw, void *node, lwc_string ***classes, uint32_t *n_classes); static css_error node_id(void *pw, void *node, lwc_string **id); +static css_error named_ancestor_node(void *pw, void *node, + const css_qname *qname, void **ancestor); static css_error named_parent_node(void *pw, void *node, const css_qname *qname, void **parent); static css_error named_sibling_node(void *pw, void *node, @@ -66,6 +69,9 @@ static css_error set_libcss_node_data(void *pw, void *node, static css_error get_libcss_node_data(void *pw, void *node, void **libcss_node_data); +/* select handler vtable */ +static struct css_select_handler svgtiny_select_handler; + /** * Resolve a relative URL to an absolute one by doing nothing. This is @@ -240,6 +246,40 @@ css_error node_id(void *pw, void *node, lwc_string **id) } +/** + * Find the first ancestor of the given element having the given name + * + * This function thinly wraps dom_element_named_ancestor_node(), which + * performs exactly the search we want. + * + * \param pw Pointer to the current SVG parser state + * \param node Libdom SVG node whose ancestor we want + * \param qname Name of the ancestor node to search for + * \param ancestor Address at which to store the ancestor node pointer + * + * \return Always returns CSS_OK + * + * \post If a suitable element is found, a pointer to it will be + * stored at the address pointed to by \a ancestor; otherwise, + * NULL will be stored at the address pointed to by \a ancestor + */ +css_error named_ancestor_node(void *pw, void *node, + const css_qname *qname, void **ancestor) +{ + UNUSED(pw); + + /* It's OK if node isn't an element, libdom checks for it. */ + dom_element_named_ancestor_node((dom_element *)node, + qname->name, + (struct dom_element **)ancestor); + + /* A comment in named_parent_node() explains why we unref + * this here. */ + dom_node_unref(*ancestor); + + return CSS_OK; +} + /** * Find the first parent of the given element having the given name @@ -1820,6 +1860,57 @@ css_error ua_default_for_property(void *pw, uint32_t property, } +/** + * 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 * @@ -1884,3 +1975,48 @@ css_error get_libcss_node_data(void *pw, void *node, /* dom_node_get_user_data() always returns DOM_NO_ERR */ return CSS_OK; } + + +/** + * The vtable of select handler callbacks passed by libsvgtiny to + * css_select_style(). + */ +static css_select_handler svgtiny_select_handler = { + CSS_SELECT_HANDLER_VERSION_1, + node_name, + node_classes, + node_id, + named_ancestor_node, + named_parent_node, + named_sibling_node, + named_generic_sibling_node, + parent_node, + sibling_node, + node_has_name, + node_has_class, + node_has_id, + node_has_attribute, + node_has_attribute_equal, + node_has_attribute_dashmatch, + node_has_attribute_includes, + node_has_attribute_prefix, + node_has_attribute_suffix, + node_has_attribute_substring, + node_is_root, + node_count_siblings, + node_is_empty, + node_is_link, + node_is_visited, + node_is_hover, + node_is_active, + node_is_focus, + node_is_enabled, + node_is_disabled, + node_is_checked, + node_is_target, + node_is_lang, + node_presentational_hint, + ua_default_for_property, + set_libcss_node_data, + get_libcss_node_data, +};