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LibWeb: Implement window.length
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@ -742,6 +742,28 @@ BrowsingContext* BrowsingContext::choose_a_browsing_context(StringView name, boo
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return chosen;
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}
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// https://html.spec.whatwg.org/multipage/browsers.html#document-tree-child-browsing-context
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size_t BrowsingContext::document_tree_child_browsing_context_count() const
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{
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size_t count = 0;
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// A browsing context child is a document-tree child browsing context of parent if child is a child browsing context and child's container is in a document tree.
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for_each_child([this, &count](BrowsingContext const& child) {
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if (child.is_child_of(*this) && child.container()->in_a_document_tree())
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++count;
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});
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return count;
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}
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// https://html.spec.whatwg.org/multipage/browsers.html#child-browsing-context
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bool BrowsingContext::is_child_of(BrowsingContext const& parent) const
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{
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// A browsing context child is said to be a child browsing context of another browsing context parent,
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// if child's container document is non-null and child's container document's browsing context is parent.
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return container_document() && container_document()->browsing_context() == &parent;
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}
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// https://html.spec.whatwg.org/multipage/dom.html#still-on-its-initial-about:blank-document
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bool BrowsingContext::still_on_its_initial_about_blank_document() const
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{
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@ -80,6 +80,10 @@ public:
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BrowsingContext* choose_a_browsing_context(StringView name, bool noopener);
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size_t document_tree_child_browsing_context_count() const;
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bool is_child_of(BrowsingContext const&) const;
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HTML::BrowsingContextContainer* container() { return m_container; }
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HTML::BrowsingContextContainer const* container() const { return m_container; }
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@ -794,6 +794,7 @@ void Window::initialize(JS::Realm& realm)
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define_native_accessor(realm, "pageXOffset", scroll_x_getter, {}, attr);
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define_native_accessor(realm, "scrollY", scroll_y_getter, {}, attr);
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define_native_accessor(realm, "pageYOffset", scroll_y_getter, {}, attr);
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define_native_accessor(realm, "length", length_getter, {}, attr);
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define_native_function(realm, "scroll", scroll, 2, attr);
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define_native_function(realm, "scrollTo", scroll, 2, attr);
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@ -1074,6 +1075,29 @@ JS_DEFINE_NATIVE_FUNCTION(Window::btoa)
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return JS::js_string(vm, move(encoded));
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}
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// https://html.spec.whatwg.org/multipage/window-object.html#number-of-document-tree-child-browsing-contexts
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JS::ThrowCompletionOr<size_t> Window::document_tree_child_browsing_context_count() const
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{
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auto* impl = TRY(impl_from(vm()));
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// 1. If W's browsing context is null, then return 0.
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auto* this_browsing_context = impl->associated_document().browsing_context();
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if (!this_browsing_context)
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return 0;
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// 2. Return the number of document-tree child browsing contexts of W's browsing context.
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return this_browsing_context->document_tree_child_browsing_context_count();
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}
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// https://html.spec.whatwg.org/multipage/window-object.html#dom-length
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JS_DEFINE_NATIVE_FUNCTION(Window::length_getter)
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{
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auto* impl = TRY(impl_from(vm));
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// The length getter steps are to return the number of document-tree child browsing contexts of this.
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return TRY(impl->document_tree_child_browsing_context_count());
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}
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// https://html.spec.whatwg.org/multipage/browsers.html#dom-top
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JS_DEFINE_NATIVE_FUNCTION(Window::top_getter)
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{
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@ -52,6 +52,8 @@ public:
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HTML::BrowsingContext const* browsing_context() const;
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HTML::BrowsingContext* browsing_context();
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JS::ThrowCompletionOr<size_t> document_tree_child_browsing_context_count() const;
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void alert_impl(String const&);
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bool confirm_impl(String const&);
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String prompt_impl(String const&, String const&);
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@ -201,6 +203,7 @@ public:
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Bindings::CrossOriginPropertyDescriptorMap& cross_origin_property_descriptor_map() { return m_cross_origin_property_descriptor_map; }
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private:
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JS_DECLARE_NATIVE_FUNCTION(length_getter);
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JS_DECLARE_NATIVE_FUNCTION(top_getter);
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JS_DECLARE_NATIVE_FUNCTION(document_getter);
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