mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-06-11 10:18:15 +09:00
0bb0061915
We do not fire `beforeinput` events since other browsers do not seem to do so either. The spec asks us to check whether a command's action modified the DOM tree. This means adding or removing nodes and attributes, or changing character data anywhere in the tree. We have `Document::dom_tree_version()` for node updates, but for character data a new version number is introduced that allows us to easily keep track of any text changes in the entire tree.
111 lines
3.7 KiB
C++
111 lines
3.7 KiB
C++
/*
|
||
* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
|
||
* Copyright (c) 2022, Andreas Kling <andreas@ladybird.org>
|
||
*
|
||
* SPDX-License-Identifier: BSD-2-Clause
|
||
*/
|
||
|
||
#pragma once
|
||
|
||
#include <LibGC/Root.h>
|
||
#include <LibWeb/DOM/MutationRecord.h>
|
||
#include <LibWeb/WebIDL/CallbackType.h>
|
||
#include <LibWeb/WebIDL/ExceptionOr.h>
|
||
|
||
namespace Web::DOM {
|
||
|
||
// https://dom.spec.whatwg.org/#dictdef-mutationobserverinit
|
||
struct MutationObserverInit {
|
||
bool child_list { false };
|
||
Optional<bool> attributes;
|
||
Optional<bool> character_data;
|
||
bool subtree { false };
|
||
Optional<bool> attribute_old_value;
|
||
Optional<bool> character_data_old_value;
|
||
Optional<Vector<String>> attribute_filter;
|
||
};
|
||
|
||
// https://dom.spec.whatwg.org/#mutationobserver
|
||
class MutationObserver final : public Bindings::PlatformObject {
|
||
WEB_PLATFORM_OBJECT(MutationObserver, Bindings::PlatformObject);
|
||
GC_DECLARE_ALLOCATOR(MutationObserver);
|
||
|
||
public:
|
||
static WebIDL::ExceptionOr<GC::Ref<MutationObserver>> construct_impl(JS::Realm&, GC::Ptr<WebIDL::CallbackType>);
|
||
virtual ~MutationObserver() override;
|
||
|
||
WebIDL::ExceptionOr<void> observe(Node& target, MutationObserverInit options = {});
|
||
void disconnect();
|
||
Vector<GC::Root<MutationRecord>> take_records();
|
||
|
||
Vector<WeakPtr<Node>>& node_list() { return m_node_list; }
|
||
Vector<WeakPtr<Node>> const& node_list() const { return m_node_list; }
|
||
|
||
WebIDL::CallbackType& callback() { return *m_callback; }
|
||
|
||
void enqueue_record(Badge<Node>, GC::Ref<MutationRecord> mutation_record)
|
||
{
|
||
m_record_queue.append(*mutation_record);
|
||
}
|
||
|
||
private:
|
||
MutationObserver(JS::Realm&, GC::Ptr<WebIDL::CallbackType>);
|
||
|
||
virtual void initialize(JS::Realm&) override;
|
||
virtual void visit_edges(Cell::Visitor&) override;
|
||
|
||
// https://dom.spec.whatwg.org/#concept-mo-callback
|
||
GC::Ptr<WebIDL::CallbackType> m_callback;
|
||
|
||
// https://dom.spec.whatwg.org/#mutationobserver-node-list
|
||
// NOTE: These are weak, per https://dom.spec.whatwg.org/#garbage-collection
|
||
// Registered observers in a node’s registered observer list have a weak reference to the node.
|
||
Vector<WeakPtr<Node>> m_node_list;
|
||
|
||
// https://dom.spec.whatwg.org/#concept-mo-queue
|
||
Vector<GC::Ref<MutationRecord>> m_record_queue;
|
||
};
|
||
|
||
// https://dom.spec.whatwg.org/#registered-observer
|
||
class RegisteredObserver : public JS::Cell {
|
||
GC_CELL(RegisteredObserver, JS::Cell);
|
||
|
||
public:
|
||
static GC::Ref<RegisteredObserver> create(MutationObserver&, MutationObserverInit const&);
|
||
virtual ~RegisteredObserver() override;
|
||
|
||
GC::Ref<MutationObserver> observer() const { return m_observer; }
|
||
|
||
MutationObserverInit const& options() const { return m_options; }
|
||
void set_options(MutationObserverInit options) { m_options = move(options); }
|
||
|
||
protected:
|
||
RegisteredObserver(MutationObserver& observer, MutationObserverInit const& options);
|
||
|
||
virtual void visit_edges(Cell::Visitor&) override;
|
||
|
||
private:
|
||
GC::Ref<MutationObserver> m_observer;
|
||
MutationObserverInit m_options;
|
||
};
|
||
|
||
// https://dom.spec.whatwg.org/#transient-registered-observer
|
||
class TransientRegisteredObserver final : public RegisteredObserver {
|
||
GC_CELL(TransientRegisteredObserver, RegisteredObserver);
|
||
GC_DECLARE_ALLOCATOR(TransientRegisteredObserver);
|
||
|
||
public:
|
||
static GC::Ref<TransientRegisteredObserver> create(MutationObserver&, MutationObserverInit const&, RegisteredObserver& source);
|
||
virtual ~TransientRegisteredObserver() override;
|
||
|
||
GC::Ref<RegisteredObserver> source() const { return m_source; }
|
||
|
||
private:
|
||
TransientRegisteredObserver(MutationObserver& observer, MutationObserverInit const& options, RegisteredObserver& source);
|
||
|
||
virtual void visit_edges(Cell::Visitor&) override;
|
||
|
||
GC::Ref<RegisteredObserver> m_source;
|
||
};
|
||
|
||
}
|