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1 /* | 1 /* |
2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights | 2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights |
3 * reserved. | 3 * reserved. |
4 * | 4 * |
5 * Portions are Copyright (C) 1998 Netscape Communications Corporation. | 5 * Portions are Copyright (C) 1998 Netscape Communications Corporation. |
6 * | 6 * |
7 * Other contributors: | 7 * Other contributors: |
8 * Robert O'Callahan <roc+@cs.cmu.edu> | 8 * Robert O'Callahan <roc+@cs.cmu.edu> |
9 * David Baron <dbaron@fas.harvard.edu> | 9 * David Baron <dbaron@fas.harvard.edu> |
10 * Christian Biesinger <cbiesinger@gmail.com> | 10 * Christian Biesinger <cbiesinger@gmail.com> |
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163 box().document().rootScrollerController()) | 163 box().document().rootScrollerController()) |
164 controller->didDisposePaintLayerScrollableArea(*this); | 164 controller->didDisposePaintLayerScrollableArea(*this); |
165 | 165 |
166 m_scrollbarManager.dispose(); | 166 m_scrollbarManager.dispose(); |
167 | 167 |
168 if (m_scrollCorner) | 168 if (m_scrollCorner) |
169 m_scrollCorner->destroy(); | 169 m_scrollCorner->destroy(); |
170 if (m_resizer) | 170 if (m_resizer) |
171 m_resizer->destroy(); | 171 m_resizer->destroy(); |
172 | 172 |
173 clearScrollableArea(); | 173 clearScrollAnimators(); |
174 | 174 |
175 // Note: it is not safe to call ScrollAnchor::clear if the document is being | 175 // Note: it is not safe to call ScrollAnchor::clear if the document is being |
176 // destroyed, because LayoutObjectChildList::removeChildNode skips the call to | 176 // destroyed, because LayoutObjectChildList::removeChildNode skips the call to |
177 // willBeRemovedFromTree, | 177 // willBeRemovedFromTree, |
178 // leaving the ScrollAnchor with a stale LayoutObject pointer. | 178 // leaving the ScrollAnchor with a stale LayoutObject pointer. |
179 if (RuntimeEnabledFeatures::scrollAnchoringEnabled() && | 179 if (RuntimeEnabledFeatures::scrollAnchoringEnabled() && |
180 !box().documentBeingDestroyed()) | 180 !box().documentBeingDestroyed()) |
181 m_scrollAnchor.clearSelf(); | 181 m_scrollAnchor.clearSelf(); |
182 | 182 |
183 #if ENABLE(ASSERT) | 183 #if ENABLE(ASSERT) |
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359 maximumScrollOffsetInt() - minimumScrollOffsetInt(); | 359 maximumScrollOffsetInt() - minimumScrollOffsetInt(); |
360 return (orientation == HorizontalScrollbar) ? scrollDimensions.width() | 360 return (orientation == HorizontalScrollbar) ? scrollDimensions.width() |
361 : scrollDimensions.height(); | 361 : scrollDimensions.height(); |
362 } | 362 } |
363 | 363 |
364 void PaintLayerScrollableArea::updateScrollOffset(const ScrollOffset& newOffset, | 364 void PaintLayerScrollableArea::updateScrollOffset(const ScrollOffset& newOffset, |
365 ScrollType scrollType) { | 365 ScrollType scrollType) { |
366 if (scrollOffset() == newOffset) | 366 if (scrollOffset() == newOffset) |
367 return; | 367 return; |
368 | 368 |
369 showOverlayScrollbars(); | |
370 ScrollOffset scrollDelta = scrollOffset() - newOffset; | 369 ScrollOffset scrollDelta = scrollOffset() - newOffset; |
371 m_scrollOffset = newOffset; | 370 m_scrollOffset = newOffset; |
372 | 371 |
373 LocalFrame* frame = box().frame(); | 372 LocalFrame* frame = box().frame(); |
374 ASSERT(frame); | 373 ASSERT(frame); |
375 | 374 |
376 FrameView* frameView = box().frameView(); | 375 FrameView* frameView = box().frameView(); |
377 | 376 |
378 TRACE_EVENT1("devtools.timeline", "ScrollLayer", "data", | 377 TRACE_EVENT1("devtools.timeline", "ScrollLayer", "data", |
379 InspectorScrollLayerEvent::data(&box())); | 378 InspectorScrollLayerEvent::data(&box())); |
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509 : 0; | 508 : 0; |
510 } | 509 } |
511 | 510 |
512 // TODO(szager): Handle fractional scroll offsets correctly. | 511 // TODO(szager): Handle fractional scroll offsets correctly. |
513 return IntRect( | 512 return IntRect( |
514 flooredIntPoint(scrollPosition()), | 513 flooredIntPoint(scrollPosition()), |
515 IntSize(max(0, layer()->size().width() - verticalScrollbarWidth), | 514 IntSize(max(0, layer()->size().width() - verticalScrollbarWidth), |
516 max(0, layer()->size().height() - horizontalScrollbarHeight))); | 515 max(0, layer()->size().height() - horizontalScrollbarHeight))); |
517 } | 516 } |
518 | 517 |
519 void PaintLayerScrollableArea::visibleSizeChanged() { | |
520 showOverlayScrollbars(); | |
521 } | |
522 | |
523 int PaintLayerScrollableArea::visibleHeight() const { | 518 int PaintLayerScrollableArea::visibleHeight() const { |
524 return layer()->size().height(); | 519 return layer()->size().height(); |
525 } | 520 } |
526 | 521 |
527 int PaintLayerScrollableArea::visibleWidth() const { | 522 int PaintLayerScrollableArea::visibleWidth() const { |
528 return layer()->size().width(); | 523 return layer()->size().width(); |
529 } | 524 } |
530 | 525 |
531 IntSize PaintLayerScrollableArea::contentsSize() const { | 526 IntSize PaintLayerScrollableArea::contentsSize() const { |
532 return IntSize(pixelSnappedScrollWidth(), pixelSnappedScrollHeight()); | 527 return IntSize(pixelSnappedScrollWidth(), pixelSnappedScrollHeight()); |
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544 } | 539 } |
545 | 540 |
546 bool PaintLayerScrollableArea::shouldSuspendScrollAnimations() const { | 541 bool PaintLayerScrollableArea::shouldSuspendScrollAnimations() const { |
547 LayoutView* view = box().view(); | 542 LayoutView* view = box().view(); |
548 if (!view) | 543 if (!view) |
549 return true; | 544 return true; |
550 return view->frameView()->shouldSuspendScrollAnimations(); | 545 return view->frameView()->shouldSuspendScrollAnimations(); |
551 } | 546 } |
552 | 547 |
553 void PaintLayerScrollableArea::scrollbarVisibilityChanged() { | 548 void PaintLayerScrollableArea::scrollbarVisibilityChanged() { |
554 updateScrollbarsEnabledState(); | |
555 if (LayoutView* view = box().view()) | 549 if (LayoutView* view = box().view()) |
556 return view->clearHitTestCache(); | 550 return view->clearHitTestCache(); |
557 } | 551 } |
558 | 552 |
559 bool PaintLayerScrollableArea::scrollbarsCanBeActive() const { | 553 bool PaintLayerScrollableArea::scrollbarsCanBeActive() const { |
560 LayoutView* view = box().view(); | 554 LayoutView* view = box().view(); |
561 if (!view) | 555 if (!view) |
562 return false; | 556 return false; |
563 return view->frameView()->scrollbarsCanBeActive(); | 557 return view->frameView()->scrollbarsCanBeActive(); |
564 } | 558 } |
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641 if (overflowRect().isEmpty()) | 635 if (overflowRect().isEmpty()) |
642 return; | 636 return; |
643 LayoutPoint scrollableOverflow = | 637 LayoutPoint scrollableOverflow = |
644 m_overflowRect.location() - | 638 m_overflowRect.location() - |
645 LayoutSize(box().borderLeft(), box().borderTop()); | 639 LayoutSize(box().borderLeft(), box().borderTop()); |
646 setScrollOrigin(flooredIntPoint(-scrollableOverflow) + | 640 setScrollOrigin(flooredIntPoint(-scrollableOverflow) + |
647 box().originAdjustmentForScrollbars()); | 641 box().originAdjustmentForScrollbars()); |
648 } | 642 } |
649 | 643 |
650 void PaintLayerScrollableArea::updateScrollDimensions() { | 644 void PaintLayerScrollableArea::updateScrollDimensions() { |
651 if (m_overflowRect.size() != box().layoutOverflowRect().size()) | |
652 contentsResized(); | |
653 m_overflowRect = box().layoutOverflowRect(); | 645 m_overflowRect = box().layoutOverflowRect(); |
654 box().flipForWritingMode(m_overflowRect); | 646 box().flipForWritingMode(m_overflowRect); |
655 updateScrollOrigin(); | 647 updateScrollOrigin(); |
656 } | 648 } |
657 | 649 |
658 void PaintLayerScrollableArea::setScrollOffsetUnconditionally( | 650 void PaintLayerScrollableArea::setScrollOffsetUnconditionally( |
659 const ScrollOffset& offset, | 651 const ScrollOffset& offset, |
660 ScrollType scrollType) { | 652 ScrollType scrollType) { |
661 cancelScrollAnimation(); | 653 cancelScrollAnimation(); |
662 scrollOffsetChanged(offset, scrollType); | 654 scrollOffsetChanged(offset, scrollType); |
663 } | 655 } |
664 | 656 |
| 657 void PaintLayerScrollableArea::didChangeScrollbarsHidden() { |
| 658 updateScrollbarsEnabledState(); |
| 659 } |
| 660 |
665 void PaintLayerScrollableArea::updateScrollbarsEnabledState() { | 661 void PaintLayerScrollableArea::updateScrollbarsEnabledState() { |
666 // overflow:scroll should just enable/disable. | 662 // overflow:scroll should just enable/disable. |
667 if (box().style()->overflowX() == OverflowScroll && horizontalScrollbar()) { | 663 if (box().style()->overflowX() == OverflowScroll && horizontalScrollbar()) { |
668 horizontalScrollbar()->setEnabled(hasHorizontalOverflow() && | 664 horizontalScrollbar()->setEnabled(hasHorizontalOverflow() && |
669 !scrollbarsHidden()); | 665 !scrollbarsHidden()); |
670 } | 666 } |
671 if (box().style()->overflowY() == OverflowScroll && verticalScrollbar()) { | 667 if (box().style()->overflowY() == OverflowScroll && verticalScrollbar()) { |
672 verticalScrollbar()->setEnabled(hasVerticalOverflow() && | 668 verticalScrollbar()->setEnabled(hasVerticalOverflow() && |
673 !scrollbarsHidden()); | 669 !scrollbarsHidden()); |
674 } | 670 } |
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1967 | 1963 |
1968 void PaintLayerScrollableArea::DelayScrollOffsetClampScope:: | 1964 void PaintLayerScrollableArea::DelayScrollOffsetClampScope:: |
1969 clampScrollableAreas() { | 1965 clampScrollableAreas() { |
1970 for (auto& scrollableArea : *s_needsClamp) | 1966 for (auto& scrollableArea : *s_needsClamp) |
1971 scrollableArea->clampScrollOffsetsAfterLayout(); | 1967 scrollableArea->clampScrollOffsetsAfterLayout(); |
1972 delete s_needsClamp; | 1968 delete s_needsClamp; |
1973 s_needsClamp = nullptr; | 1969 s_needsClamp = nullptr; |
1974 } | 1970 } |
1975 | 1971 |
1976 } // namespace blink | 1972 } // namespace blink |
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