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https://github.com/RGBCube/serenity
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LibWeb: Make TreeWalker GC-allocated
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parent
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commit
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7 changed files with 41 additions and 30 deletions
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@ -8,6 +8,7 @@
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#include <LibWeb/Bindings/IDLAbstractOperations.h>
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#include <LibWeb/Bindings/NodeWrapper.h>
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#include <LibWeb/Bindings/NodeWrapperFactory.h>
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#include <LibWeb/Bindings/TreeWalkerPrototype.h>
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#include <LibWeb/Bindings/Wrapper.h>
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#include <LibWeb/DOM/DOMException.h>
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#include <LibWeb/DOM/Node.h>
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@ -17,26 +18,36 @@
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namespace Web::DOM {
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TreeWalker::TreeWalker(Node& root)
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: m_root(root)
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: PlatformObject(root.document().preferred_window_object().ensure_web_prototype<Bindings::TreeWalkerPrototype>("TreeWalker"))
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, m_root(root)
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, m_current(root)
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{
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}
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TreeWalker::~TreeWalker() = default;
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void TreeWalker::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_filter.ptr());
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}
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// https://dom.spec.whatwg.org/#dom-document-createtreewalker
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NonnullRefPtr<TreeWalker> TreeWalker::create(Node& root, unsigned what_to_show, NodeFilter* filter)
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JS::NonnullGCPtr<TreeWalker> TreeWalker::create(Node& root, unsigned what_to_show, JS::GCPtr<NodeFilter> filter)
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{
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// 1. Let walker be a new TreeWalker object.
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// 2. Set walker’s root and walker’s current to root.
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auto walker = adopt_ref(*new TreeWalker(root));
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auto& window_object = root.document().preferred_window_object();
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auto* walker = window_object.heap().allocate<TreeWalker>(window_object.realm(), root);
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// 3. Set walker’s whatToShow to whatToShow.
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walker->m_what_to_show = what_to_show;
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// 4. Set walker’s filter to filter.
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walker->m_filter = JS::make_handle(filter);
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walker->m_filter = filter;
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// 5. Return walker.
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return walker;
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return *walker;
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}
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// https://dom.spec.whatwg.org/#dom-treewalker-currentnode
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@ -220,13 +231,9 @@ JS::ThrowCompletionOr<RefPtr<Node>> TreeWalker::next_node()
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// https://dom.spec.whatwg.org/#concept-node-filter
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JS::ThrowCompletionOr<NodeFilter::Result> TreeWalker::filter(Node& node)
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{
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VERIFY(wrapper());
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auto& vm = wrapper()->vm();
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auto& realm = *vm.current_realm();
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// 1. If traverser’s active flag is set, then throw an "InvalidStateError" DOMException.
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if (m_active)
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return JS::throw_completion(wrap(realm, InvalidStateError::create("NodeIterator is already active")));
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return JS::throw_completion(wrap(shape().realm(), InvalidStateError::create("NodeIterator is already active")));
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// 2. Let n be node’s nodeType attribute value − 1.
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auto n = node.node_type() - 1;
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@ -236,7 +243,7 @@ JS::ThrowCompletionOr<NodeFilter::Result> TreeWalker::filter(Node& node)
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return NodeFilter::FILTER_SKIP;
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// 4. If traverser’s filter is null, then return FILTER_ACCEPT.
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if (!m_filter.cell())
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if (!m_filter)
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return NodeFilter::FILTER_ACCEPT;
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// 5. Set traverser’s active flag.
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@ -244,7 +251,7 @@ JS::ThrowCompletionOr<NodeFilter::Result> TreeWalker::filter(Node& node)
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// 6. Let result be the return value of call a user object’s operation with traverser’s filter, "acceptNode", and « node ».
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// If this throws an exception, then unset traverser’s active flag and rethrow the exception.
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auto result = Bindings::IDL::call_user_object_operation(m_filter->callback(), "acceptNode", {}, wrap(realm, node));
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auto result = Bindings::IDL::call_user_object_operation(m_filter->callback(), "acceptNode", {}, wrap(shape().realm(), node));
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if (result.is_abrupt()) {
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m_active = false;
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return result;
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@ -254,7 +261,7 @@ JS::ThrowCompletionOr<NodeFilter::Result> TreeWalker::filter(Node& node)
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m_active = false;
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// 8. Return result.
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auto result_value = TRY(result.value()->to_i32(vm));
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auto result_value = TRY(result.value()->to_i32(vm()));
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return static_cast<NodeFilter::Result>(result_value);
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}
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