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| 1 /* | 1 /* |
| 2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
reserved. | 2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
reserved. |
| 3 * | 3 * |
| 4 * Portions are Copyright (C) 1998 Netscape Communications Corporation. | 4 * Portions are Copyright (C) 1998 Netscape Communications Corporation. |
| 5 * | 5 * |
| 6 * Other contributors: | 6 * Other contributors: |
| 7 * Robert O'Callahan <roc+@cs.cmu.edu> | 7 * Robert O'Callahan <roc+@cs.cmu.edu> |
| 8 * David Baron <dbaron@fas.harvard.edu> | 8 * David Baron <dbaron@fas.harvard.edu> |
| 9 * Christian Biesinger <cbiesinger@web.de> | 9 * Christian Biesinger <cbiesinger@web.de> |
| 10 * Randall Jesup <rjesup@wgate.com> | 10 * Randall Jesup <rjesup@wgate.com> |
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| 177 | 177 |
| 178 LayoutRect LayerClipper::childrenClipRect() const | 178 LayoutRect LayerClipper::childrenClipRect() const |
| 179 { | 179 { |
| 180 // FIXME: border-radius not accounted for. | 180 // FIXME: border-radius not accounted for. |
| 181 // FIXME: Regions not accounted for. | 181 // FIXME: Regions not accounted for. |
| 182 Layer* clippingRootLayer = clippingRootForPainting(); | 182 Layer* clippingRootLayer = clippingRootForPainting(); |
| 183 LayoutRect layerBounds; | 183 LayoutRect layerBounds; |
| 184 ClipRect backgroundRect, foregroundRect, outlineRect; | 184 ClipRect backgroundRect, foregroundRect, outlineRect; |
| 185 // Need to use uncached clip rects, because the value of 'dontClipToOverflow
' may be different from the painting path (<rdar://problem/11844909>). | 185 // Need to use uncached clip rects, because the value of 'dontClipToOverflow
' may be different from the painting path (<rdar://problem/11844909>). |
| 186 ClipRectsContext context(clippingRootLayer, UncachedClipRects); | 186 ClipRectsContext context(clippingRootLayer, UncachedClipRects); |
| 187 calculateRects(context, m_renderer.view()->unscaledDocumentRect(), layerBoun
ds, backgroundRect, foregroundRect, outlineRect); | 187 calculateRects(context, LayoutRect(m_renderer.view()->unscaledDocumentRect()
), layerBounds, backgroundRect, foregroundRect, outlineRect); |
| 188 return clippingRootLayer->renderer()->localToAbsoluteQuad(FloatQuad(foregrou
ndRect.rect())).enclosingBoundingBox(); | 188 return LayoutRect(clippingRootLayer->renderer()->localToAbsoluteQuad(FloatQu
ad(foregroundRect.rect())).enclosingBoundingBox()); |
| 189 } | 189 } |
| 190 | 190 |
| 191 LayoutRect LayerClipper::localClipRect() const | 191 LayoutRect LayerClipper::localClipRect() const |
| 192 { | 192 { |
| 193 // FIXME: border-radius not accounted for. | 193 // FIXME: border-radius not accounted for. |
| 194 Layer* clippingRootLayer = clippingRootForPainting(); | 194 Layer* clippingRootLayer = clippingRootForPainting(); |
| 195 LayoutRect layerBounds; | 195 LayoutRect layerBounds; |
| 196 ClipRect backgroundRect, foregroundRect, outlineRect; | 196 ClipRect backgroundRect, foregroundRect, outlineRect; |
| 197 ClipRectsContext context(clippingRootLayer, PaintingClipRects); | 197 ClipRectsContext context(clippingRootLayer, PaintingClipRects); |
| 198 calculateRects(context, LayoutRect::infiniteIntRect(), layerBounds, backgrou
ndRect, foregroundRect, outlineRect); | 198 calculateRects(context, LayoutRect(LayoutRect::infiniteIntRect()), layerBoun
ds, backgroundRect, foregroundRect, outlineRect); |
| 199 | 199 |
| 200 LayoutRect clipRect = backgroundRect.rect(); | 200 LayoutRect clipRect = backgroundRect.rect(); |
| 201 if (clipRect == LayoutRect::infiniteIntRect()) | 201 if (clipRect == LayoutRect::infiniteIntRect()) |
| 202 return clipRect; | 202 return clipRect; |
| 203 | 203 |
| 204 LayoutPoint clippingRootOffset; | 204 LayoutPoint clippingRootOffset; |
| 205 m_renderer.layer()->convertToLayerCoords(clippingRootLayer, clippingRootOffs
et); | 205 m_renderer.layer()->convertToLayerCoords(clippingRootLayer, clippingRootOffs
et); |
| 206 clipRect.moveBy(-clippingRootOffset); | 206 clipRect.moveBy(-clippingRootOffset); |
| 207 | 207 |
| 208 return clipRect; | 208 return clipRect; |
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| 269 foregroundRect.intersect(newPosClip); | 269 foregroundRect.intersect(newPosClip); |
| 270 outlineRect.intersect(newPosClip); | 270 outlineRect.intersect(newPosClip); |
| 271 } | 271 } |
| 272 } | 272 } |
| 273 | 273 |
| 274 void LayerClipper::calculateClipRects(const ClipRectsContext& context, ClipRects
& clipRects) const | 274 void LayerClipper::calculateClipRects(const ClipRectsContext& context, ClipRects
& clipRects) const |
| 275 { | 275 { |
| 276 bool rootLayerScrolls = m_renderer.document().settings() && m_renderer.docum
ent().settings()->rootLayerScrolls(); | 276 bool rootLayerScrolls = m_renderer.document().settings() && m_renderer.docum
ent().settings()->rootLayerScrolls(); |
| 277 if (!m_renderer.layer()->parent() && !rootLayerScrolls) { | 277 if (!m_renderer.layer()->parent() && !rootLayerScrolls) { |
| 278 // The root layer's clip rect is always infinite. | 278 // The root layer's clip rect is always infinite. |
| 279 clipRects.reset(LayoutRect::infiniteIntRect()); | 279 clipRects.reset(LayoutRect(LayoutRect::infiniteIntRect())); |
| 280 return; | 280 return; |
| 281 } | 281 } |
| 282 | 282 |
| 283 bool isClippingRoot = m_renderer.layer() == context.rootLayer; | 283 bool isClippingRoot = m_renderer.layer() == context.rootLayer; |
| 284 | 284 |
| 285 // For transformed layers, the root layer was shifted to be us, so there is
no need to | 285 // For transformed layers, the root layer was shifted to be us, so there is
no need to |
| 286 // examine the parent. We want to cache clip rects with us as the root. | 286 // examine the parent. We want to cache clip rects with us as the root. |
| 287 Layer* parentLayer = !isClippingRoot ? m_renderer.layer()->parent() : 0; | 287 Layer* parentLayer = !isClippingRoot ? m_renderer.layer()->parent() : 0; |
| 288 | 288 |
| 289 // Ensure that our parent's clip has been calculated so that we can examine
the values. | 289 // Ensure that our parent's clip has been calculated so that we can examine
the values. |
| 290 if (parentLayer) { | 290 if (parentLayer) { |
| 291 // FIXME: Why don't we just call getClipRects here? | 291 // FIXME: Why don't we just call getClipRects here? |
| 292 if (context.usesCache() && parentLayer->clipper().cachedClipRects(contex
t)) { | 292 if (context.usesCache() && parentLayer->clipper().cachedClipRects(contex
t)) { |
| 293 clipRects = *parentLayer->clipper().cachedClipRects(context); | 293 clipRects = *parentLayer->clipper().cachedClipRects(context); |
| 294 } else { | 294 } else { |
| 295 parentLayer->clipper().calculateClipRects(context, clipRects); | 295 parentLayer->clipper().calculateClipRects(context, clipRects); |
| 296 } | 296 } |
| 297 } else { | 297 } else { |
| 298 clipRects.reset(LayoutRect::infiniteIntRect()); | 298 clipRects.reset(LayoutRect(LayoutRect::infiniteIntRect())); |
| 299 } | 299 } |
| 300 | 300 |
| 301 adjustClipRectsForChildren(m_renderer, clipRects); | 301 adjustClipRectsForChildren(m_renderer, clipRects); |
| 302 | 302 |
| 303 if ((m_renderer.hasOverflowClip() && (context.respectOverflowClip == Respect
OverflowClip || !isClippingRoot)) || m_renderer.hasClip()) { | 303 if ((m_renderer.hasOverflowClip() && (context.respectOverflowClip == Respect
OverflowClip || !isClippingRoot)) || m_renderer.hasClip()) { |
| 304 // This offset cannot use convertToLayerCoords, because sometimes our ro
otLayer may be across | 304 // This offset cannot use convertToLayerCoords, because sometimes our ro
otLayer may be across |
| 305 // some transformed layer boundary, for example, in the LayerCompositor
overlapMap, where | 305 // some transformed layer boundary, for example, in the LayerCompositor
overlapMap, where |
| 306 // clipRects are needed in view space. | 306 // clipRects are needed in view space. |
| 307 applyClipRects(context, m_renderer, roundedLayoutPoint(m_renderer.localT
oContainerPoint(FloatPoint(), context.rootLayer->renderer())), clipRects); | 307 applyClipRects(context, m_renderer, roundedLayoutPoint(m_renderer.localT
oContainerPoint(FloatPoint(), context.rootLayer->renderer())), clipRects); |
| 308 } | 308 } |
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| 319 return parentRects.overflowClipRect(); | 319 return parentRects.overflowClipRect(); |
| 320 } | 320 } |
| 321 | 321 |
| 322 ClipRect LayerClipper::backgroundClipRect(const ClipRectsContext& context) const | 322 ClipRect LayerClipper::backgroundClipRect(const ClipRectsContext& context) const |
| 323 { | 323 { |
| 324 ASSERT(m_renderer.layer()->parent()); | 324 ASSERT(m_renderer.layer()->parent()); |
| 325 ASSERT(m_renderer.view()); | 325 ASSERT(m_renderer.view()); |
| 326 | 326 |
| 327 RefPtr<ClipRects> parentClipRects = ClipRects::create(); | 327 RefPtr<ClipRects> parentClipRects = ClipRects::create(); |
| 328 if (m_renderer.layer() == context.rootLayer) | 328 if (m_renderer.layer() == context.rootLayer) |
| 329 parentClipRects->reset(LayoutRect::infiniteIntRect()); | 329 parentClipRects->reset(LayoutRect(LayoutRect::infiniteIntRect())); |
| 330 else | 330 else |
| 331 m_renderer.layer()->parent()->clipper().getOrCalculateClipRects(context,
*parentClipRects); | 331 m_renderer.layer()->parent()->clipper().getOrCalculateClipRects(context,
*parentClipRects); |
| 332 | 332 |
| 333 ClipRect result = backgroundClipRectForPosition(*parentClipRects, m_renderer
.style()->position()); | 333 ClipRect result = backgroundClipRectForPosition(*parentClipRects, m_renderer
.style()->position()); |
| 334 | 334 |
| 335 // Note: infinite clipRects should not be scrolled here, otherwise they will
accidentally no longer be considered infinite. | 335 // Note: infinite clipRects should not be scrolled here, otherwise they will
accidentally no longer be considered infinite. |
| 336 if (parentClipRects->fixed() && context.rootLayer->renderer() == m_renderer.
view() && result != LayoutRect::infiniteIntRect()) | 336 if (parentClipRects->fixed() && context.rootLayer->renderer() == m_renderer.
view() && result != LayoutRect(LayoutRect::infiniteIntRect())) |
| 337 result.move(m_renderer.view()->frameView()->scrollOffsetForViewportConst
rainedObjects()); | 337 result.move(m_renderer.view()->frameView()->scrollOffsetForViewportConst
rainedObjects()); |
| 338 | 338 |
| 339 return result; | 339 return result; |
| 340 } | 340 } |
| 341 | 341 |
| 342 void LayerClipper::getOrCalculateClipRects(const ClipRectsContext& context, Clip
Rects& clipRects) const | 342 void LayerClipper::getOrCalculateClipRects(const ClipRectsContext& context, Clip
Rects& clipRects) const |
| 343 { | 343 { |
| 344 if (context.usesCache()) | 344 if (context.usesCache()) |
| 345 clipRects = *getClipRects(context); | 345 clipRects = *getClipRects(context); |
| 346 else | 346 else |
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| 365 ASSERT(current); | 365 ASSERT(current); |
| 366 if (current->transform() || current->isPaintInvalidationContainer()) | 366 if (current->transform() || current->isPaintInvalidationContainer()) |
| 367 return const_cast<Layer*>(current); | 367 return const_cast<Layer*>(current); |
| 368 } | 368 } |
| 369 | 369 |
| 370 ASSERT_NOT_REACHED(); | 370 ASSERT_NOT_REACHED(); |
| 371 return 0; | 371 return 0; |
| 372 } | 372 } |
| 373 | 373 |
| 374 } // namespace blink | 374 } // namespace blink |
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