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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@gmail.com> | 9 * Christian Biesinger <cbiesinger@gmail.com> |
10 * Randall Jesup <rjesup@wgate.com> | 10 * Randall Jesup <rjesup@wgate.com> |
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1494 return false; | 1494 return false; |
1495 | 1495 |
1496 Node* node = layer->enclosingNode(); | 1496 Node* node = layer->enclosingNode(); |
1497 if (node && node->isElementNode() && (toElement(node)->compositorMutableProp erties() & (CompositorMutableProperty::kScrollTop | CompositorMutableProperty::k ScrollLeft))) | 1497 if (node && node->isElementNode() && (toElement(node)->compositorMutableProp erties() & (CompositorMutableProperty::kScrollTop | CompositorMutableProperty::k ScrollLeft))) |
1498 return true; | 1498 return true; |
1499 | 1499 |
1500 // TODO(schenney) The color test alone is inadequate. When https://coderevie w.chromium.org/2196583002 lands | 1500 // TODO(schenney) The color test alone is inadequate. When https://coderevie w.chromium.org/2196583002 lands |
1501 // we should use PaintLayer::shouldPaintBackgroundOntoForeground() because w e will not still get | 1501 // we should use PaintLayer::shouldPaintBackgroundOntoForeground() because w e will not still get |
1502 // LCD text unless the conditions there are met. It also unifies logic for s crolling compositing decisions. | 1502 // LCD text unless the conditions there are met. It also unifies logic for s crolling compositing decisions. |
1503 bool backgroundSupportsLCDText = RuntimeEnabledFeatures::compositeOpaqueScro llersEnabled() | 1503 bool backgroundSupportsLCDText = RuntimeEnabledFeatures::compositeOpaqueScro llersEnabled() |
1504 && !layer->layoutObject()->style()->visitedDependentColor(CSSPropertyBac kgroundColor).hasAlpha(); | 1504 && layer->shouldPaintBackgroundOntoScrollingContentsLayer(); |
flackr
2016/08/19 03:19:30
You also need to check that the scrolling contents
Stephen Chennney
2016/08/19 17:30:41
Done.
| |
1505 if (mode == PaintLayerScrollableArea::ConsiderLCDText | 1505 if (mode == PaintLayerScrollableArea::ConsiderLCDText |
1506 && !layer->compositor()->preferCompositingToLCDTextEnabled() | 1506 && !layer->compositor()->preferCompositingToLCDTextEnabled() |
1507 && !backgroundSupportsLCDText) | 1507 && !backgroundSupportsLCDText) |
1508 return false; | 1508 return false; |
1509 | 1509 |
1510 // TODO(schenney) Tests fail if we do not also exclude layer->layoutObject() ->style()->hasBorderDecoration() | 1510 // TODO(schenney) Tests fail if we do not also exclude layer->layoutObject() ->style()->hasBorderDecoration() |
1511 // (missing background behind dashed borders). Resolve this case, or not, an d update this check with | 1511 // (missing background behind dashed borders). Resolve this case, or not, an d update this check with |
1512 // the results. | 1512 // the results. |
1513 return !(layer->size().isEmpty() | 1513 return !(layer->size().isEmpty() |
1514 || layer->hasDescendantWithClipPath() | 1514 || layer->hasDescendantWithClipPath() |
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1771 | 1771 |
1772 void PaintLayerScrollableArea::DelayScrollPositionClampScope::clampScrollableAre as() | 1772 void PaintLayerScrollableArea::DelayScrollPositionClampScope::clampScrollableAre as() |
1773 { | 1773 { |
1774 for (auto& scrollableArea : *s_needsClamp) | 1774 for (auto& scrollableArea : *s_needsClamp) |
1775 scrollableArea->clampScrollPositionsAfterLayout(); | 1775 scrollableArea->clampScrollPositionsAfterLayout(); |
1776 delete s_needsClamp; | 1776 delete s_needsClamp; |
1777 s_needsClamp = nullptr; | 1777 s_needsClamp = nullptr; |
1778 } | 1778 } |
1779 | 1779 |
1780 } // namespace blink | 1780 } // namespace blink |
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