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/*
* Copyright (C) 2010 Apple 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 "ChunkedUpdateDrawingArea.h"
#include "DrawingAreaMessageKinds.h"
#include "DrawingAreaProxyMessageKinds.h"
#include "MessageID.h"
#include "UpdateChunk.h"
#include "WebCoreArgumentCoders.h"
#include "WebPage.h"
#include "WebProcess.h"
using namespace WebCore;
namespace WebKit {
ChunkedUpdateDrawingArea::ChunkedUpdateDrawingArea(DrawingAreaInfo::Identifier identifier, WebPage* webPage)
: DrawingArea(DrawingAreaInfo::ChunkedUpdate, identifier, webPage)
, m_isWaitingForUpdate(false)
, m_paintingIsSuspended(false)
, m_displayTimer(WebProcess::shared().runLoop(), this, &ChunkedUpdateDrawingArea::display)
{
}
ChunkedUpdateDrawingArea::~ChunkedUpdateDrawingArea()
{
}
void ChunkedUpdateDrawingArea::scroll(const IntRect& scrollRect, const IntSize& scrollDelta)
{
// FIXME: Do something much smarter.
setNeedsDisplay(scrollRect);
}
void ChunkedUpdateDrawingArea::setNeedsDisplay(const IntRect& rect)
{
// FIXME: Collect a set of rects/region instead of just the union
// of all rects.
m_dirtyRect.unite(rect);
scheduleDisplay();
}
void ChunkedUpdateDrawingArea::display()
{
ASSERT(!m_isWaitingForUpdate);
if (m_paintingIsSuspended)
return;
if (m_dirtyRect.isEmpty())
return;
// Laying out the page can cause the drawing area to change so we keep an extra reference.
RefPtr<ChunkedUpdateDrawingArea> protect(this);
// Layout if necessary.
m_webPage->layoutIfNeeded();
if (m_webPage->drawingArea() != this)
return;
IntRect dirtyRect = m_dirtyRect;
m_dirtyRect = IntRect();
// Create a new UpdateChunk and paint into it.
UpdateChunk updateChunk(dirtyRect);
paintIntoUpdateChunk(&updateChunk);
WebProcess::shared().connection()->send(DrawingAreaProxyLegacyMessage::Update, m_webPage->pageID(), CoreIPC::In(updateChunk));
m_isWaitingForUpdate = true;
m_displayTimer.stop();
}
void ChunkedUpdateDrawingArea::scheduleDisplay()
{
if (m_paintingIsSuspended)
return;
if (m_isWaitingForUpdate)
return;
if (m_dirtyRect.isEmpty())
return;
if (m_displayTimer.isActive())
return;
m_displayTimer.startOneShot(0);
}
void ChunkedUpdateDrawingArea::setSize(const IntSize& viewSize)
{
ASSERT_ARG(viewSize, !viewSize.isEmpty());
// We don't want to wait for an update until we display.
m_isWaitingForUpdate = false;
// Laying out the page can cause the drawing area to change so we keep an extra reference.
RefPtr<ChunkedUpdateDrawingArea> protect(this);
m_webPage->setSize(viewSize);
m_webPage->layoutIfNeeded();
if (m_webPage->drawingArea() != this)
return;
if (m_paintingIsSuspended) {
ASSERT(!m_displayTimer.isActive());
// Painting is suspended, just send back an empty update chunk.
WebProcess::shared().connection()->send(DrawingAreaProxyLegacyMessage::DidSetSize, m_webPage->pageID(), CoreIPC::In(UpdateChunk()));
return;
}
// Create a new UpdateChunk and paint into it.
UpdateChunk updateChunk(IntRect(0, 0, viewSize.width(), viewSize.height()));
paintIntoUpdateChunk(&updateChunk);
m_displayTimer.stop();
WebProcess::shared().connection()->send(DrawingAreaProxyLegacyMessage::DidSetSize, m_webPage->pageID(), CoreIPC::In(updateChunk));
}
void ChunkedUpdateDrawingArea::suspendPainting()
{
ASSERT(!m_paintingIsSuspended);
m_paintingIsSuspended = true;
m_displayTimer.stop();
}
void ChunkedUpdateDrawingArea::resumePainting(bool forceRepaint)
{
ASSERT(m_paintingIsSuspended);
m_paintingIsSuspended = false;
if (forceRepaint) {
// Just set the dirty rect to the entire page size.
m_dirtyRect = IntRect(IntPoint(0, 0), m_webPage->size());
}
// Schedule a display.
scheduleDisplay();
}
void ChunkedUpdateDrawingArea::didUpdate()
{
m_isWaitingForUpdate = false;
// Display if needed.
display();
}
void ChunkedUpdateDrawingArea::didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID messageID, CoreIPC::ArgumentDecoder* arguments)
{
DrawingAreaInfo::Identifier targetIdentifier;
if (!arguments->decode(CoreIPC::Out(targetIdentifier)))
return;
// We can switch drawing areas on the fly, so if this message was targetted at an obsolete drawing area, ignore it.
if (targetIdentifier != info().identifier)
return;
switch (messageID.get<DrawingAreaLegacyMessage::Kind>()) {
case DrawingAreaLegacyMessage::SetSize: {
IntSize size;
if (!arguments->decode(CoreIPC::Out(size)))
return;
setSize(size);
break;
}
case DrawingAreaLegacyMessage::SuspendPainting:
suspendPainting();
break;
case DrawingAreaLegacyMessage::ResumePainting: {
bool forceRepaint;
if (!arguments->decode(CoreIPC::Out(forceRepaint)))
return;
resumePainting(forceRepaint);
break;
}
case DrawingAreaLegacyMessage::DidUpdate:
didUpdate();
break;
default:
ASSERT_NOT_REACHED();
break;
}
}
} // namespace WebKit
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