src/svgtiny_css.c: define a css_select_handler

[libsvgtiny.git] / src / svgtiny_css.c

diff --git a/src/svgtiny_css.c b/src/svgtiny_css.c
index f01c3b40df17ca066611aec5a3458c8d6d104bd2..76b01d196abdd6c0fe4a72dc9987555e5922fdc4 100644 (file)
--- 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
@@ -1884,3 +1924,48 @@ 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,
+};