/* * Copyright (C) 2017 Google Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #include "DOMWindowProperty.h" #include "EventTarget.h" #include <wtf/RefCounted.h> namespace WebCore { class Frame; class VisualViewport final : public RefCounted<VisualViewport>, public EventTargetWithInlineData, public DOMWindowProperty { public: static Ref<VisualViewport> create(Frame* frame) { return adoptRef(*new VisualViewport(frame)); } // EventTarget EventTargetInterface eventTargetInterface() const final; ScriptExecutionContext* scriptExecutionContext() const final; bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) final; double offsetLeft() const; double offsetTop() const; double pageLeft() const; double pageTop() const; double width() const; double height() const; double scale() const; void update(); using RefCounted::ref; using RefCounted::deref; private: explicit VisualViewport(Frame*); void refEventTarget() final { ref(); } void derefEventTarget() final { deref(); } void enqueueResizeEvent(); void enqueueScrollEvent(); void updateFrameLayout() const; double m_offsetLeft { 0 }; double m_offsetTop { 0 }; double m_pageLeft { 0 }; double m_pageTop { 0 }; double m_width { 0 }; double m_height { 0 }; double m_scale { 1 }; }; } // namespace WebCore