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[js] element.isEqualNode (only for Elements)

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This commit is contained in:
Witold Filipczyk 2021-05-20 16:44:57 +02:00
parent 1af9c9fc31
commit c5a1296200
2 changed files with 93 additions and 5 deletions
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66
src/ecmascript/spidermonkey/element.c
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@ -1150,11 +1150,20 @@ element_get_property_title(JSContext *ctx, unsigned int argc, JS::Value *vp)
static int was_el = 0;
static void
dump_element(struct string *buf, xmlpp::Element *element)
dump_element(struct string *buf, xmlpp::Element *element, bool toSort = false)
{
add_char_to_string(buf, '<');
add_to_string(buf, element->get_name().c_str());
auto attrs = element->get_attributes();
if (toSort) {
attrs.sort([](const xmlpp::Attribute *a1, const xmlpp::Attribute *a2)
{
if (a1->get_name() == a2->get_name()) {
return a1->get_value() < a2->get_value();
}
return a1->get_name() < a2->get_name();
});
}
auto it = attrs.begin();
auto end = attrs.end();
for (;it != end; ++it) {
@ -1169,7 +1178,7 @@ dump_element(struct string *buf, xmlpp::Element *element)
}
static void
walk_tree(struct string *buf, xmlpp::Node *node, bool start = true)
walk_tree(struct string *buf, xmlpp::Node *node, bool start = true, bool toSortAttrs = false)
{
if (!start) {
const auto textNode = dynamic_cast<const xmlpp::ContentNode*>(node);
@ -1180,7 +1189,7 @@ walk_tree(struct string *buf, xmlpp::Node *node, bool start = true)
const auto element = dynamic_cast<const xmlpp::Element*>(node);
if (element) {
dump_element(buf, element);
dump_element(buf, element, toSortAttrs);
}
}
}
@ -1190,7 +1199,7 @@ walk_tree(struct string *buf, xmlpp::Node *node, bool start = true)
auto end = childs.end();
for (; it != end; ++it) {
walk_tree(buf, *it, false);
walk_tree(buf, *it, false, toSortAttrs);
}
if (!start) {
@ -1584,6 +1593,7 @@ static bool element_getAttributeNode(JSContext *ctx, unsigned int argc, JS::Valu
static bool element_hasAttribute(JSContext *ctx, unsigned int argc, JS::Value *rval);
static bool element_hasAttributes(JSContext *ctx, unsigned int argc, JS::Value *rval);
static bool element_hasChildNodes(JSContext *ctx, unsigned int argc, JS::Value *rval);
static bool element_isEqualNode(JSContext *ctx, unsigned int argc, JS::Value *rval);
static bool element_isSameNode(JSContext *ctx, unsigned int argc, JS::Value *rval);
const spidermonkeyFunctionSpec element_funcs[] = {
@ -1592,6 +1602,7 @@ const spidermonkeyFunctionSpec element_funcs[] = {
{ "hasAttribute", element_hasAttribute, 1 },
{ "hasAttributes", element_hasAttributes, 0 },
{ "hasChildNodes", element_hasChildNodes, 0 },
{ "isEqualNode", element_isEqualNode, 1 },
{ "isSameNode", element_isSameNode, 1 },
{ NULL }
};
@ -1777,6 +1788,52 @@ element_hasChildNodes(JSContext *ctx, unsigned int argc, JS::Value *rval)
return true;
}
static bool
element_isEqualNode(JSContext *ctx, unsigned int argc, JS::Value *rval)
{
JSCompartment *comp = js::GetContextCompartment(ctx);
if (!comp || argc != 1) {
return false;
}
JS::CallArgs args = CallArgsFromVp(argc, rval);
JS::RootedObject hobj(ctx, &args.thisv().toObject());
struct ecmascript_interpreter *interpreter = JS_GetCompartmentPrivate(comp);
if (!JS_InstanceOf(ctx, hobj, &element_class, NULL))
return false;
xmlpp::Element *el = JS_GetPrivate(hobj);
if (!el) {
args.rval().setBoolean(false);
return true;
}
JS::RootedObject node(ctx, &args[0].toObject());
xmlpp::Element *el2 = JS_GetPrivate(node);
struct string first;
struct string second;
init_string(&first);
init_string(&second);
walk_tree(&first, el, false, true);
walk_tree(&second, el2, false, true);
args.rval().setBoolean(!strcmp(first.source, second.source));
done_string(&first);
done_string(&second);
return true;
}
static bool
element_isSameNode(JSContext *ctx, unsigned int argc, JS::Value *rval)
{
@ -1809,7 +1866,6 @@ element_isSameNode(JSContext *ctx, unsigned int argc, JS::Value *rval)
return true;
}
JSObject *
getElement(JSContext *ctx, void *node)
{

32
test/ecmascript/isEqualNode.html Normal file
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@ -0,0 +1,32 @@
<!DOCTYPE html>
<html>
<body>
<p>Click the buttons to compare the <strong>first item</strong> in two of the lists.</p>
<button onclick="myFunction('myList1','myList2')">Compare List 1 and 2</button>
<button onclick="myFunction('myList1','myList3')">Compare List 1 and 3</button>
<br><br>
List 1:
<ul id="myList1"><li><a href="/" rel="nofollow">Water</a></li><li>Milk</li></ul>
List 2:
<ul id="myList2"><li>Coffee</li><li>Tea</li></ul>
List 3:
<ul id="myList3"><li><a rel="nofollow" href="/">Water</a></li><li>Fire</li></ul>
<p><strong>Note:</strong> Internet Explorer 8 and earlier does not support the isEqualNode method.</p>
<p id="demo"></p>
<script>
function myFunction(x,y) {
var item1 = document.getElementById(x).firstChild;
var item2 = document.getElementById(y).firstChild;
var x = item1.isEqualNode(item2);
alert(x);
}
</script>
</body>
</html>