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/*
* Copyright (C) 2011 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 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 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 "NonCompositedContentHost.h"
#include "FloatPoint.h"
#include "FloatRect.h"
#include "GraphicsLayer.h"
#include "PlatformContextSkia.h"
#include "WebViewImpl.h"
#include <public/WebContentLayer.h>
#include <public/WebFloatPoint.h>
namespace WebKit {
NonCompositedContentHost::NonCompositedContentHost(WebViewImpl* webView)
: m_webView(webView)
, m_opaque(true)
, m_showDebugBorders(false)
, m_deviceScaleFactor(1.0)
{
m_graphicsLayer = WebCore::GraphicsLayer::create(this);
#ifndef NDEBUG
m_graphicsLayer->setName("non-composited content");
#endif
m_graphicsLayer->setDrawsContent(true);
WebContentLayer layer = m_graphicsLayer->platformLayer()->to<WebContentLayer>();
layer.setUseLCDText(true);
layer.setOpaque(true);
#if !OS(ANDROID)
layer.setDrawCheckerboardForMissingTiles(true);
#endif
}
NonCompositedContentHost::~NonCompositedContentHost()
{
}
void NonCompositedContentHost::setBackgroundColor(const WebCore::Color& color)
{
m_graphicsLayer->platformLayer()->setBackgroundColor(color.rgb());
}
void NonCompositedContentHost::setOpaque(bool opaque)
{
m_opaque = opaque;
m_graphicsLayer->platformLayer()->setOpaque(opaque);
}
void NonCompositedContentHost::setScrollLayer(WebCore::GraphicsLayer* layer)
{
m_graphicsLayer->setNeedsDisplay();
if (!layer) {
m_graphicsLayer->removeFromParent();
return;
}
if (*layer->platformLayer() == scrollLayer())
return;
layer->addChildAtIndex(m_graphicsLayer.get(), 0);
ASSERT(haveScrollLayer());
}
static void reserveScrollbarLayers(WebLayer layer, WebLayer clipLayer)
{
// Scrollbars and corners are known to be attached outside the root clip
// rect, so skip the clipLayer subtree.
if (layer == clipLayer)
return;
for (size_t i = 0; i < layer.numberOfChildren(); ++i)
reserveScrollbarLayers(layer.childAt(i), clipLayer);
if (layer.drawsContent())
layer.setAlwaysReserveTextures(true);
}
void NonCompositedContentHost::setViewport(const WebCore::IntSize& viewportSize, const WebCore::IntSize& contentsSize, const WebCore::IntPoint& scrollPosition, const WebCore::IntPoint& scrollOrigin, float deviceScale)
{
if (!haveScrollLayer())
return;
bool visibleRectChanged = m_viewportSize != viewportSize;
m_viewportSize = viewportSize;
WebScrollableLayer layer = scrollLayer();
layer.setScrollPosition(scrollPosition + scrollOrigin);
layer.setPosition(WebFloatPoint(-scrollPosition));
// Due to the possibility of pinch zoom, the noncomposited layer is always
// assumed to be scrollable.
layer.setScrollable(true);
m_deviceScaleFactor = deviceScale;
m_graphicsLayer->deviceOrPageScaleFactorChanged();
m_graphicsLayer->setSize(contentsSize);
// In RTL-style pages, the origin of the initial containing block for the
// root layer may be positive; translate the layer to avoid negative
// coordinates.
m_layerAdjust = -toSize(scrollOrigin);
if (m_graphicsLayer->transform().m41() != m_layerAdjust.width() || m_graphicsLayer->transform().m42() != m_layerAdjust.height()) {
WebCore::TransformationMatrix transform = m_graphicsLayer->transform();
transform.setM41(m_layerAdjust.width());
transform.setM42(m_layerAdjust.height());
m_graphicsLayer->setTransform(transform);
// If a tiled layer is shifted left or right, the content that goes into
// each tile will change. Invalidate the entire layer when this happens.
m_graphicsLayer->setNeedsDisplay();
} else if (visibleRectChanged)
m_graphicsLayer->setNeedsDisplay();
WebLayer clipLayer = layer.parent();
WebLayer rootLayer = clipLayer;
while (!rootLayer.parent().isNull())
rootLayer = rootLayer.parent();
reserveScrollbarLayers(rootLayer, clipLayer);
}
bool NonCompositedContentHost::haveScrollLayer()
{
return m_graphicsLayer->parent();
}
WebScrollableLayer NonCompositedContentHost::scrollLayer()
{
if (!m_graphicsLayer->parent())
return WebScrollableLayer();
return m_graphicsLayer->parent()->platformLayer()->to<WebScrollableLayer>();
}
void NonCompositedContentHost::invalidateRect(const WebCore::IntRect& rect)
{
WebCore::IntRect layerRect = rect;
layerRect.move(-m_layerAdjust);
m_graphicsLayer->setNeedsDisplayInRect(WebCore::FloatRect(layerRect));
}
void NonCompositedContentHost::notifyAnimationStarted(const WebCore::GraphicsLayer*, double /* time */)
{
// Intentionally left empty since we don't support animations on the non-composited content.
}
void NonCompositedContentHost::notifySyncRequired(const WebCore::GraphicsLayer*)
{
m_webView->scheduleCompositingLayerSync();
}
void NonCompositedContentHost::paintContents(const WebCore::GraphicsLayer*, WebCore::GraphicsContext& context, WebCore::GraphicsLayerPaintingPhase, const WebCore::IntRect& clipRect)
{
// On non-android platforms, we want to render text with subpixel antialiasing on the root layer
// so long as the root is opaque. On android all text is grayscale.
#if !OS(ANDROID)
if (m_opaque)
context.platformContext()->setDrawingToImageBuffer(false);
#endif
context.translate(-m_layerAdjust);
WebCore::IntRect adjustedClipRect = clipRect;
adjustedClipRect.move(m_layerAdjust);
m_webView->paintRootLayer(context, adjustedClipRect);
}
void NonCompositedContentHost::setShowDebugBorders(bool showDebugBorders)
{
m_showDebugBorders = showDebugBorders;
m_graphicsLayer->updateDebugIndicators();
}
bool NonCompositedContentHost::showDebugBorders(const WebCore::GraphicsLayer*) const
{
return m_showDebugBorders;
}
bool NonCompositedContentHost::showRepaintCounter(const WebCore::GraphicsLayer*) const
{
return false;
}
} // namespace WebKit
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