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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* Copyright (C) 2004, 2005, 2006, 2009, 2010, 2013 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#include "HTMLFrameOwnerElement.h"
#include "OverlapTestRequestClient.h"
#include "RenderReplaced.h"
#include "Widget.h"
namespace WebCore {
class WidgetHierarchyUpdatesSuspensionScope {
public:
WidgetHierarchyUpdatesSuspensionScope()
{
s_widgetHierarchyUpdateSuspendCount++;
}
~WidgetHierarchyUpdatesSuspensionScope()
{
ASSERT(s_widgetHierarchyUpdateSuspendCount);
if (s_widgetHierarchyUpdateSuspendCount == 1 && s_haveScheduledWidgetToMove)
moveWidgets();
s_widgetHierarchyUpdateSuspendCount--;
}
static bool isSuspended() { return s_widgetHierarchyUpdateSuspendCount; }
static void scheduleWidgetToMove(Widget&, FrameView*);
private:
using WidgetToParentMap = HashMap<RefPtr<Widget>, FrameView*>;
static WidgetToParentMap& widgetNewParentMap();
WEBCORE_EXPORT void moveWidgets();
WEBCORE_EXPORT static unsigned s_widgetHierarchyUpdateSuspendCount;
WEBCORE_EXPORT static bool s_haveScheduledWidgetToMove;
};
inline void WidgetHierarchyUpdatesSuspensionScope::scheduleWidgetToMove(Widget& widget, FrameView* frame)
{
s_haveScheduledWidgetToMove = true;
widgetNewParentMap().set(&widget, frame);
}
class RenderWidget : public RenderReplaced, private OverlapTestRequestClient {
WTF_MAKE_ISO_ALLOCATED(RenderWidget);
public:
virtual ~RenderWidget();
HTMLFrameOwnerElement& frameOwnerElement() const { return downcast<HTMLFrameOwnerElement>(nodeForNonAnonymous()); }
Widget* widget() const { return m_widget.get(); }
WEBCORE_EXPORT void setWidget(RefPtr<Widget>&&);
static RenderWidget* find(const Widget&);
enum class ChildWidgetState { Valid, Destroyed };
ChildWidgetState updateWidgetPosition() WARN_UNUSED_RETURN;
WEBCORE_EXPORT IntRect windowClipRect() const;
bool requiresAcceleratedCompositing() const;
void ref() { ++m_refCount; }
void deref();
protected:
RenderWidget(HTMLFrameOwnerElement&, RenderStyle&&);
void willBeDestroyed() override;
void styleDidChange(StyleDifference, const RenderStyle* oldStyle) final;
void layout() override;
void paint(PaintInfo&, const LayoutPoint&) override;
bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override;
bool requiresLayer() const override;
private:
void element() const = delete;
bool isWidget() const final { return true; }
bool needsPreferredWidthsRecalculation() const final;
RenderBox* embeddedContentBox() const final;
void setSelectionState(HighlightState) final;
void setOverlapTestResult(bool) final;
bool setWidgetGeometry(const LayoutRect&);
bool updateWidgetGeometry();
void paintContents(PaintInfo&, const LayoutPoint&);
RefPtr<Widget> m_widget;
IntRect m_clipRect; // The rectangle needs to remain correct after scrolling, so it is stored in content view coordinates, and not clipped to window.
unsigned m_refCount { 1 };
};
inline void RenderWidget::deref()
{
ASSERT(m_refCount);
if (!--m_refCount)
delete this;
}
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderWidget, isWidget())