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LibWeb: Get the length property from collection through standard getters

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DOMTokenList and FileList do not have the 'length' own property - their
prototypes have this property instead. So we must go through [[Get]] to
retrieve this property, which will consider the prototype.
This commit is contained in:
Timothy Flynn 2024-11-02 11:40:31 -04:00 committed by Andreas Kling
parent 627eb90086
commit 3d0bbb4bcf
Notes: github-actions[bot] 2024-11-03 17:08:57 +00:00 
Author: https://github.com/trflynn89
Commit: https://github.com/LadybirdBrowser/ladybird/commit/3d0bbb4bcf4
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2137
1 changed files with 7 additions and 7 deletions
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14
Userland/Libraries/LibWeb/WebDriver/ExecuteScript.cpp
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@ -187,19 +187,20 @@ static ErrorOr<JsonValue, ExecuteScriptResultType> clone_an_object(JS::Realm& re
auto& vm = realm.vm();
// 1. Let result be the value of the first matching statement, matching on value:
auto get_result = [&]() -> ErrorOr<Variant<JsonArray, JsonObject>, ExecuteScriptResultType> {
auto result = TRY(([&]() -> ErrorOr<Variant<JsonArray, JsonObject>, ExecuteScriptResultType> {
// -> a collection
if (is_collection(value)) {
// A new Array which length property is equal to the result of getting the property length of value.
auto length_property = TRY_OR_JS_ERROR(value.internal_get_own_property(vm.names.length));
if (!length_property->value.has_value())
return ExecuteScriptResultType::JavaScriptError;
auto length = TRY_OR_JS_ERROR(length_property->value->to_length(vm));
auto length_property = TRY_OR_JS_ERROR(value.get(vm.names.length));
auto length = TRY_OR_JS_ERROR(length_property.to_length(vm));
if (length > NumericLimits<u32>::max())
return ExecuteScriptResultType::JavaScriptError;
auto array = JsonArray {};
for (size_t i = 0; i < length; ++i)
array.must_append(JsonValue {});
return array;
}
// -> Otherwise
@ -207,8 +208,7 @@ static ErrorOr<JsonValue, ExecuteScriptResultType> clone_an_object(JS::Realm& re
// A new Object.
return JsonObject {};
}
};
auto result = TRY(get_result());
}()));
// 2. For each enumerable own property in value, run the following substeps:
for (auto& key : MUST(value.Object::internal_own_property_keys())) {