2 * Copyright (C) 2012 Google Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include "LinkHighlight.h"
30 #include "SkMatrix44.h"
31 #include "WebFrameImpl.h"
33 #include "WebViewImpl.h"
34 #include "core/dom/Node.h"
35 #include "core/frame/Frame.h"
36 #include "core/frame/FrameView.h"
37 #include "core/rendering/CompositedLayerMapping.h"
38 #include "core/rendering/RenderLayer.h"
39 #include "core/rendering/RenderLayerModelObject.h"
40 #include "core/rendering/RenderObject.h"
41 #include "core/rendering/RenderView.h"
42 #include "core/rendering/style/ShadowData.h"
43 #include "platform/graphics/Color.h"
44 #include "public/platform/Platform.h"
45 #include "public/platform/WebAnimationCurve.h"
46 #include "public/platform/WebCompositorSupport.h"
47 #include "public/platform/WebFloatAnimationCurve.h"
48 #include "public/platform/WebFloatPoint.h"
49 #include "public/platform/WebRect.h"
50 #include "public/platform/WebSize.h"
51 #include "wtf/CurrentTime.h"
52 #include "wtf/Vector.h"
54 using namespace WebCore;
60 PassOwnPtr<LinkHighlight> LinkHighlight::create(Node* node, WebViewImpl* owningWebViewImpl)
62 return adoptPtr(new LinkHighlight(node, owningWebViewImpl));
65 LinkHighlight::LinkHighlight(Node* node, WebViewImpl* owningWebViewImpl)
67 , m_owningWebViewImpl(owningWebViewImpl)
68 , m_currentGraphicsLayer(0)
69 , m_geometryNeedsUpdate(false)
70 , m_isAnimating(false)
71 , m_startTime(monotonicallyIncreasingTime())
74 ASSERT(owningWebViewImpl);
75 WebCompositorSupport* compositorSupport = Platform::current()->compositorSupport();
76 m_contentLayer = adoptPtr(compositorSupport->createContentLayer(this));
77 m_clipLayer = adoptPtr(compositorSupport->createLayer());
78 m_clipLayer->setAnchorPoint(WebFloatPoint());
79 m_clipLayer->addChild(m_contentLayer->layer());
80 m_contentLayer->layer()->setAnimationDelegate(this);
81 m_contentLayer->layer()->setDrawsContent(true);
82 m_contentLayer->layer()->setOpacity(1);
83 m_geometryNeedsUpdate = true;
87 LinkHighlight::~LinkHighlight()
89 clearGraphicsLayerLinkHighlightPointer();
93 WebContentLayer* LinkHighlight::contentLayer()
95 return m_contentLayer.get();
98 WebLayer* LinkHighlight::clipLayer()
100 return m_clipLayer.get();
103 void LinkHighlight::releaseResources()
108 RenderLayer* LinkHighlight::computeEnclosingCompositingLayer()
110 if (!m_node || !m_node->renderer())
113 // Find the nearest enclosing composited layer and attach to it. We may need to cross frame boundaries
114 // to find a suitable layer.
115 RenderObject* renderer = m_node->renderer();
116 RenderLayerModelObject* repaintContainer;
118 repaintContainer = renderer->containerForRepaint();
119 if (!repaintContainer) {
120 renderer = renderer->frame()->ownerRenderer();
124 } while (!repaintContainer);
125 RenderLayer* renderLayer = repaintContainer->layer();
127 if (!renderLayer || renderLayer->compositingState() == NotComposited)
130 GraphicsLayer* newGraphicsLayer = renderLayer->compositedLayerMapping()->mainGraphicsLayer();
131 m_clipLayer->setTransform(SkMatrix44());
133 if (!newGraphicsLayer->drawsContent()) {
134 if (renderLayer->scrollableArea() && renderLayer->scrollableArea()->usesCompositedScrolling()) {
135 ASSERT(renderLayer->hasCompositedLayerMapping() && renderLayer->compositedLayerMapping()->scrollingContentsLayer());
136 newGraphicsLayer = renderLayer->compositedLayerMapping()->scrollingContentsLayer();
140 if (m_currentGraphicsLayer != newGraphicsLayer) {
141 if (m_currentGraphicsLayer)
142 clearGraphicsLayerLinkHighlightPointer();
144 m_currentGraphicsLayer = newGraphicsLayer;
145 m_currentGraphicsLayer->addLinkHighlight(this);
151 static void convertTargetSpaceQuadToCompositedLayer(const FloatQuad& targetSpaceQuad, RenderObject* targetRenderer, RenderObject* compositedRenderer, FloatQuad& compositedSpaceQuad)
153 ASSERT(targetRenderer);
154 ASSERT(compositedRenderer);
156 for (unsigned i = 0; i < 4; ++i) {
159 case 0: point = roundedIntPoint(targetSpaceQuad.p1()); break;
160 case 1: point = roundedIntPoint(targetSpaceQuad.p2()); break;
161 case 2: point = roundedIntPoint(targetSpaceQuad.p3()); break;
162 case 3: point = roundedIntPoint(targetSpaceQuad.p4()); break;
165 point = targetRenderer->frame()->view()->contentsToWindow(point);
166 point = compositedRenderer->frame()->view()->windowToContents(point);
167 FloatPoint floatPoint = compositedRenderer->absoluteToLocal(point, UseTransforms);
170 case 0: compositedSpaceQuad.setP1(floatPoint); break;
171 case 1: compositedSpaceQuad.setP2(floatPoint); break;
172 case 2: compositedSpaceQuad.setP3(floatPoint); break;
173 case 3: compositedSpaceQuad.setP4(floatPoint); break;
178 static void addQuadToPath(const FloatQuad& quad, Path& path)
180 // FIXME: Make this create rounded quad-paths, just like the axis-aligned case.
181 path.moveTo(quad.p1());
182 path.addLineTo(quad.p2());
183 path.addLineTo(quad.p3());
184 path.addLineTo(quad.p4());
188 void LinkHighlight::computeQuads(Node* node, Vector<FloatQuad>& outQuads) const
190 if (!node || !node->renderer())
193 RenderObject* renderer = node->renderer();
195 // For inline elements, absoluteQuads will return a line box based on the line-height
196 // and font metrics, which is technically incorrect as replaced elements like images
197 // should use their intristic height and expand the linebox as needed. To get an
198 // appropriately sized highlight we descend into the children and have them add their
200 if (renderer->isRenderInline()) {
201 for (Node* child = node->firstChild(); child; child = child->nextSibling())
202 computeQuads(child, outQuads);
204 renderer->absoluteQuads(outQuads);
209 bool LinkHighlight::computeHighlightLayerPathAndPosition(RenderLayer* compositingLayer)
211 if (!m_node || !m_node->renderer() || !m_currentGraphicsLayer)
214 ASSERT(compositingLayer);
216 // Get quads for node in absolute coordinates.
217 Vector<FloatQuad> quads;
218 computeQuads(m_node.get(), quads);
219 ASSERT(quads.size());
221 // Adjust for offset between target graphics layer and the node's renderer.
222 FloatPoint positionAdjust = IntPoint(m_currentGraphicsLayer->offsetFromRenderer());
225 for (size_t quadIndex = 0; quadIndex < quads.size(); ++quadIndex) {
226 FloatQuad absoluteQuad = quads[quadIndex];
227 absoluteQuad.move(-positionAdjust.x(), -positionAdjust.y());
229 // Transform node quads in target absolute coords to local coordinates in the compositor layer.
230 FloatQuad transformedQuad;
231 convertTargetSpaceQuadToCompositedLayer(absoluteQuad, m_node->renderer(), compositingLayer->renderer(), transformedQuad);
233 // FIXME: for now, we'll only use rounded paths if we have a single node quad. The reason for this is that
234 // we may sometimes get a chain of adjacent boxes (e.g. for text nodes) which end up looking like sausage
235 // links: these should ideally be merged into a single rect before creating the path, but that's
237 if (quads.size() == 1 && transformedQuad.isRectilinear()) {
238 FloatSize rectRoundingRadii(3, 3);
239 newPath.addRoundedRect(transformedQuad.boundingBox(), rectRoundingRadii);
241 addQuadToPath(transformedQuad, newPath);
244 FloatRect boundingRect = newPath.boundingRect();
245 newPath.translate(-toFloatSize(boundingRect.location()));
247 bool pathHasChanged = !(newPath == m_path);
248 if (pathHasChanged) {
250 m_contentLayer->layer()->setBounds(enclosingIntRect(boundingRect).size());
253 m_contentLayer->layer()->setPosition(boundingRect.location());
255 return pathHasChanged;
258 void LinkHighlight::paintContents(WebCanvas* canvas, const WebRect& webClipRect, bool, WebFloatRect&)
260 if (!m_node || !m_node->renderer())
263 GraphicsContext gc(canvas);
264 IntRect clipRect(IntPoint(webClipRect.x, webClipRect.y), IntSize(webClipRect.width, webClipRect.height));
266 gc.setFillColor(m_node->renderer()->style()->tapHighlightColor());
270 void LinkHighlight::startHighlightAnimationIfNeeded()
275 m_isAnimating = true;
276 const float startOpacity = 1;
277 // FIXME: Should duration be configurable?
278 const float fadeDuration = 0.1f;
279 const float minPreFadeDuration = 0.1f;
281 m_contentLayer->layer()->setOpacity(startOpacity);
283 WebCompositorSupport* compositorSupport = Platform::current()->compositorSupport();
285 OwnPtr<WebFloatAnimationCurve> curve = adoptPtr(compositorSupport->createFloatAnimationCurve());
287 curve->add(WebFloatKeyframe(0, startOpacity));
288 // Make sure we have displayed for at least minPreFadeDuration before starting to fade out.
289 float extraDurationRequired = std::max(0.f, minPreFadeDuration - static_cast<float>(monotonicallyIncreasingTime() - m_startTime));
290 if (extraDurationRequired)
291 curve->add(WebFloatKeyframe(extraDurationRequired, startOpacity));
292 // For layout tests we don't fade out.
293 curve->add(WebFloatKeyframe(fadeDuration + extraDurationRequired, blink::layoutTestMode() ? startOpacity : 0));
295 OwnPtr<WebAnimation> animation = adoptPtr(compositorSupport->createAnimation(*curve, WebAnimation::TargetPropertyOpacity));
297 m_contentLayer->layer()->setDrawsContent(true);
298 m_contentLayer->layer()->addAnimation(animation.leakPtr());
301 m_owningWebViewImpl->scheduleAnimation();
304 void LinkHighlight::clearGraphicsLayerLinkHighlightPointer()
306 if (m_currentGraphicsLayer) {
307 m_currentGraphicsLayer->removeLinkHighlight(this);
308 m_currentGraphicsLayer = 0;
312 void LinkHighlight::notifyAnimationStarted(double, double, blink::WebAnimation::TargetProperty)
316 void LinkHighlight::notifyAnimationFinished(double, double, blink::WebAnimation::TargetProperty)
318 // Since WebViewImpl may hang on to us for a while, make sure we
319 // release resources as soon as possible.
320 clearGraphicsLayerLinkHighlightPointer();
324 void LinkHighlight::updateGeometry()
326 // To avoid unnecessary updates (e.g. other entities have requested animations from our WebViewImpl),
327 // only proceed if we actually requested an update.
328 if (!m_geometryNeedsUpdate)
331 m_geometryNeedsUpdate = false;
333 RenderLayer* compositingLayer = computeEnclosingCompositingLayer();
334 if (compositingLayer && computeHighlightLayerPathAndPosition(compositingLayer)) {
335 // We only need to invalidate the layer if the highlight size has changed, otherwise
336 // we can just re-position the layer without needing to repaint.
337 m_contentLayer->layer()->invalidate();
339 if (m_currentGraphicsLayer)
340 m_currentGraphicsLayer->addRepaintRect(FloatRect(layer()->position().x, layer()->position().y, layer()->bounds().width, layer()->bounds().height));
341 } else if (!m_node || !m_node->renderer()) {
342 clearGraphicsLayerLinkHighlightPointer();
347 void LinkHighlight::clearCurrentGraphicsLayer()
349 m_currentGraphicsLayer = 0;
350 m_geometryNeedsUpdate = true;
353 void LinkHighlight::invalidate()
355 // Make sure we update geometry on the next callback from WebViewImpl::layout().
356 m_geometryNeedsUpdate = true;
359 WebLayer* LinkHighlight::layer()