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[quickjs] Element.closest

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This commit is contained in:
Witold Filipczyk 2021-12-01 16:36:01 +01:00
parent 701f66dc11
commit 2e466eaf6a
2 changed files with 67 additions and 0 deletions
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47
src/ecmascript/quickjs/element.c
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@ -1127,6 +1127,52 @@ js_element_cloneNode(JSContext *ctx, JSValueConst this_val, int argc, JSValueCon
}
}
static JSValue
js_element_closest(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv)
{
#ifdef ECMASCRIPT_DEBUG
fprintf(stderr, "%s:%s\n", __FILE__, __FUNCTION__);
#endif
if (argc != 1) {
return JS_UNDEFINED;
}
xmlpp::Element *el = JS_GetOpaque(this_val, js_element_class_id);
if (!el) {
return JS_NULL;
}
const char *str;
size_t len;
str = JS_ToCStringLen(ctx, &len, argv[0]);
if (!str) {
return JS_EXCEPTION;
}
xmlpp::ustring css = str;
xmlpp::ustring xpath = css2xpath(css);
if (xpath[0] == '/' && xpath[1] == '/')
{
xpath = xmlpp::ustring("descendant-or-self::") + xpath.substr(2);
}
JS_FreeCString(ctx, str);
xmlpp::Node::NodeSet elements;
do {
try {
elements = el->find(xpath);
if (elements.size()) {
return getElement(ctx, el);
}
el = dynamic_cast<xmlpp::Element*>(el->get_parent());
} catch (xmlpp::exception) {
return JS_NULL;
}
} while (el);
return JS_NULL;
}
static JSValue
js_element_contains(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv)
{
@ -1660,6 +1706,7 @@ static const JSCFunctionListEntry js_element_proto_funcs[] = {
JS_CGETSET_DEF("title", js_element_get_property_title, js_element_set_property_title),
JS_CFUNC_DEF("appendChild", 1, js_element_appendChild),
JS_CFUNC_DEF("cloneNode", 1, js_element_cloneNode),
JS_CFUNC_DEF("closest", 1, js_element_closest),
JS_CFUNC_DEF("contains", 1, js_element_contains),
JS_CFUNC_DEF("getAttribute", 1, js_element_getAttribute),
JS_CFUNC_DEF("getAttributeNode",1, js_element_getAttributeNode),

20
test/ecmascript/closest.html Normal file
View File

@ -0,0 +1,20 @@
<!DOCTYPE html>
<html>
<body>
<div class="demo"> Grandparent
<div class="demo container">Parent
<div id="myElement" class="demo">The outer HTML of closest element will be shown.</div>
</div>
</div>
<script>
var element = document.getElementById("myElement");
var closest = element.closest(".container");
if (closest) {
alert(closest.outerHTML);
}
</script>
</body>
</html>