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[js] childElementCount

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This commit is contained in:
Witold Filipczyk 2021-05-08 21:51:34 +02:00
parent d9073ea9b1
commit 471c9282ee
2 changed files with 77 additions and 0 deletions
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57
src/ecmascript/spidermonkey/element.c
View File

@ -52,6 +52,7 @@
using namespace htmlcxx;
static bool element_get_property_childElementCount(JSContext *ctx, unsigned int argc, JS::Value *vp);
static bool element_get_property_className(JSContext *ctx, unsigned int argc, JS::Value *vp);
static bool element_set_property_className(JSContext *ctx, unsigned int argc, JS::Value *vp);
static bool element_get_property_dir(JSContext *ctx, unsigned int argc, JS::Value *vp);
@ -83,6 +84,7 @@ JSClass element_class = {
};
JSPropertySpec element_props[] = {
JS_PSG("childElementCount", element_get_property_childElementCount, JSPROP_ENUMERATE),
JS_PSGS("className", element_get_property_className, element_set_property_className, JSPROP_ENUMERATE),
JS_PSGS("dir", element_get_property_dir, element_set_property_dir, JSPROP_ENUMERATE),
JS_PSGS("id", element_get_property_id, element_set_property_id, JSPROP_ENUMERATE),
@ -95,6 +97,61 @@ JSPropertySpec element_props[] = {
JS_PS_END
};
static bool
element_get_property_childElementCount(JSContext *ctx, unsigned int argc, JS::Value *vp)
{
JS::CallArgs args = CallArgsFromVp(argc, vp);
JS::RootedObject hobj(ctx, &args.thisv().toObject());
struct view_state *vs;
JSCompartment *comp = js::GetContextCompartment(ctx);
if (!comp) {
return false;
}
struct ecmascript_interpreter *interpreter = JS_GetCompartmentPrivate(comp);
/* This can be called if @obj if not itself an instance of the
* appropriate class but has one in its prototype chain. Fail
* such calls. */
if (!JS_InstanceOf(ctx, hobj, &element_class, NULL))
return false;
vs = interpreter->vs;
if (!vs) {
return false;
}
tree<HTML::Node> *el = JS_GetPrivate(hobj);
if (!el) {
args.rval().setNull();
return true;
}
struct document_view *doc_view = vs->doc_view;
struct document *document = doc_view->document;
tree<HTML::Node> *dom = document->dom;
tree<HTML::Node>::iterator beg = dom->begin();
tree<HTML::Node>::iterator end = dom->end();
tree<HTML::Node>::iterator it;
int res = 0;
unsigned int offset = el->begin()->offset();
for (it = beg; it != end; ++it) {
if (it->offset() == offset) {
res = it.number_of_children();
break;
}
}
args.rval().setInt32(res);
return true;
}
static bool
element_get_property_className(JSContext *ctx, unsigned int argc, JS::Value *vp)
{

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

@ -0,0 +1,20 @@
<html>
<body>
<a id="blabla" href="/" rel="nofollow"><b>AAA</b><u id="ble">UUU</u></a>
<b id="empty"></b>
<script>
function aa()
{
alert(document.getElementById('blabla').childElementCount);
}
function bb()
{
alert(document.getElementById('empty').childElementCount);
}
</script>
<button onclick="return aa()">blabla child element count</button>
<button onclick="return bb()">empty child element count</button>
</body>
</html>