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/*
* 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.
*/
#include "config.h"
#include "VisualViewport.h"
#include "ContextDestructionObserver.h"
#include "Document.h"
#include "Event.h"
#include "EventNames.h"
#include "LocalDOMWindow.h"
#include "LocalFrame.h"
#include "LocalFrameView.h"
#include "Page.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(VisualViewport);
VisualViewport::VisualViewport(LocalDOMWindow& window)
: LocalDOMWindowProperty(&window)
{
}
EventTargetInterface VisualViewport::eventTargetInterface() const
{
return VisualViewportEventTargetInterfaceType;
}
ScriptExecutionContext* VisualViewport::scriptExecutionContext() const
{
auto window = this->window();
if (!window)
return nullptr;
return static_cast<ContextDestructionObserver*>(window)->scriptExecutionContext();
}
bool VisualViewport::addEventListener(const AtomString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
{
if (!EventTarget::addEventListener(eventType, WTFMove(listener), options))
return false;
if (auto* frame = this->frame())
frame->document()->addListenerTypeIfNeeded(eventType);
return true;
}
void VisualViewport::updateFrameLayout() const
{
ASSERT(frame());
frame()->document()->updateLayoutIgnorePendingStylesheets(Document::RunPostLayoutTasks::Synchronously);
}
double VisualViewport::offsetLeft() const
{
if (!frame())
return 0;
updateFrameLayout();
return m_offsetLeft;
}
double VisualViewport::offsetTop() const
{
if (!frame())
return 0;
updateFrameLayout();
return m_offsetTop;
}
double VisualViewport::pageLeft() const
{
if (!frame())
return 0;
updateFrameLayout();
return m_pageLeft;
}
double VisualViewport::pageTop() const
{
if (!frame())
return 0;
updateFrameLayout();
return m_pageTop;
}
double VisualViewport::width() const
{
if (!frame())
return 0;
updateFrameLayout();
return m_width;
}
double VisualViewport::height() const
{
if (!frame())
return 0;
updateFrameLayout();
return m_height;
}
double VisualViewport::scale() const
{
// Subframes always have scale 1 since they aren't scaled relative to their parent frame.
auto* frame = this->frame();
if (!frame || !frame->isMainFrame())
return 1;
updateFrameLayout();
return m_scale;
}
void VisualViewport::update()
{
double offsetLeft = 0;
double offsetTop = 0;
m_pageLeft = 0;
m_pageTop = 0;
double width = 0;
double height = 0;
double scale = 1;
RefPtr frame = this->frame();
if (frame) {
if (auto* view = frame->view()) {
auto visualViewportRect = view->visualViewportRect();
auto layoutViewportRect = view->layoutViewportRect();
auto pageZoomFactor = frame->pageZoomFactor();
ASSERT(pageZoomFactor);
offsetLeft = (visualViewportRect.x() - layoutViewportRect.x()) / pageZoomFactor;
offsetTop = (visualViewportRect.y() - layoutViewportRect.y()) / pageZoomFactor;
m_pageLeft = visualViewportRect.x() / pageZoomFactor;
m_pageTop = visualViewportRect.y() / pageZoomFactor;
width = visualViewportRect.width() / pageZoomFactor;
height = visualViewportRect.height() / pageZoomFactor;
}
if (auto* page = frame->page())
scale = page->pageScaleFactor();
}
RefPtr<Document> document = frame ? frame->document() : nullptr;
if (m_offsetLeft != offsetLeft || m_offsetTop != offsetTop) {
if (document)
document->setNeedsVisualViewportScrollEvent();
m_offsetLeft = offsetLeft;
m_offsetTop = offsetTop;
}
if (m_width != width || m_height != height || m_scale != scale) {
if (document)
document->setNeedsVisualViewportResize();
m_width = width;
m_height = height;
m_scale = scale;
}
}
} // namespace WebCore
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