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layout: Add support for OL reversed attribute.

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This commit is contained in:
Michael Drake 2021-02-10 17:59:51 +00:00
parent 32d9de461e
commit 9783296c4f
1 changed files with 102 additions and 1 deletions
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103
content/handlers/html/layout.c
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@ -4516,6 +4516,98 @@ layout__get_ol_start(dom_node *ol_node, dom_long *start_out)
}
/**
* Helper to get reversed attribute value from a OL node.
*
* \param[in] ol_node DOM node for the OL element;
* \return true if node has reversed, otherwise false.
*/
static bool
layout__get_ol_reversed(dom_node *ol_node)
{
dom_exception exc;
bool has_reversed;
exc = dom_element_has_attribute(ol_node,
corestring_dom_reversed,
&has_reversed);
if (exc != DOM_NO_ERR) {
return false;
}
return has_reversed;
}
/**
* Get the number of list items for a list owner.
*
* \param[in] list_owner DOM node to count list items for.
* \param[in] count_out Returns list item count on success.
* \return true on success, otherwise false.
*/
static bool
layout__get_list_item_count(
dom_node *list_owner, int *count_out)
{
dom_html_element_type tag_type;
dom_exception exc;
dom_node *child;
int count;
if (list_owner == NULL) {
return false;
}
exc = dom_html_element_get_tag_type(list_owner, &tag_type);
if (exc != DOM_NO_ERR) {
return false;
}
if (tag_type != DOM_HTML_ELEMENT_TYPE_OL &&
tag_type != DOM_HTML_ELEMENT_TYPE_UL) {
return false;
}
exc = dom_node_get_first_child(list_owner, &child);
if (exc != DOM_NO_ERR) {
return false;
}
count = 0;
while (child != NULL) {
dom_node *temp_node;
if (layout__check_element_type(child,
DOM_HTML_ELEMENT_TYPE_LI)) {
struct box *child_box;
if (dom_node_get_user_data(child,
corestring_dom___ns_key_box_node_data,
&child_box) != DOM_NO_ERR) {
dom_node_unref(child);
return false;
}
if (child_box != NULL &&
child_box->list_marker != NULL) {
count++;
}
}
exc = dom_node_get_next_sibling(child, &temp_node);
dom_node_unref(child);
if (exc != DOM_NO_ERR) {
return false;
}
child = temp_node;
}
*count_out = count;
return true;
}
/**
* Handle list item counting, if this is a list owner box.
*
@ -4547,7 +4639,16 @@ layout__ordered_list_count(
next = 1;
if (tag_type == DOM_HTML_ELEMENT_TYPE_OL) {
layout__get_ol_start(box->node, &next);
bool have_start = layout__get_ol_start(box->node, &next);
bool have_reversed = layout__get_ol_reversed(box->node);
if (have_reversed) {
step = -1;
}
if (!have_start && have_reversed) {
layout__get_list_item_count(box->node, &next);
}
}
exc = dom_node_get_first_child(box->node, &child);