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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "core/page/scrolling/RootScrollerController.h" | 5 #include "core/page/scrolling/RootScrollerController.h" |
| 6 | 6 |
| 7 #include "core/dom/Document.h" | 7 #include "core/dom/Document.h" |
| 8 #include "core/dom/Element.h" | 8 #include "core/dom/Element.h" |
| 9 #include "core/frame/FrameHost.h" | 9 #include "core/frame/FrameHost.h" |
| 10 #include "core/frame/FrameView.h" | 10 #include "core/frame/FrameView.h" |
| 11 #include "core/layout/LayoutBox.h" | 11 #include "core/layout/LayoutBox.h" |
| 12 #include "core/layout/api/LayoutViewItem.h" | 12 #include "core/layout/api/LayoutViewItem.h" |
| 13 #include "core/layout/compositing/PaintLayerCompositor.h" |
| 14 #include "core/paint/PaintLayer.h" |
| 13 #include "core/paint/PaintLayerScrollableArea.h" | 15 #include "core/paint/PaintLayerScrollableArea.h" |
| 14 #include "platform/graphics/GraphicsLayer.h" | 16 #include "platform/graphics/GraphicsLayer.h" |
| 15 #include "platform/scroll/ScrollableArea.h" | 17 #include "platform/scroll/ScrollableArea.h" |
| 16 | 18 |
| 17 namespace blink { | 19 namespace blink { |
| 18 | 20 |
| 19 class RootFrameViewport; | 21 class RootFrameViewport; |
| 20 | 22 |
| 21 namespace { | 23 namespace { |
| 22 | 24 |
| (...skipping 70 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 93 bool rootScrollerValid = | 95 bool rootScrollerValid = |
| 94 m_rootScroller && isValidRootScroller(*m_rootScroller); | 96 m_rootScroller && isValidRootScroller(*m_rootScroller); |
| 95 | 97 |
| 96 Element* newEffectiveRootScroller = rootScrollerValid | 98 Element* newEffectiveRootScroller = rootScrollerValid |
| 97 ? m_rootScroller.get() | 99 ? m_rootScroller.get() |
| 98 : defaultEffectiveRootScroller(); | 100 : defaultEffectiveRootScroller(); |
| 99 | 101 |
| 100 if (m_effectiveRootScroller == newEffectiveRootScroller) | 102 if (m_effectiveRootScroller == newEffectiveRootScroller) |
| 101 return; | 103 return; |
| 102 | 104 |
| 105 PaintLayer* oldRootScrollerLayer = rootScrollerPaintLayer(); |
| 106 |
| 103 m_effectiveRootScroller = newEffectiveRootScroller; | 107 m_effectiveRootScroller = newEffectiveRootScroller; |
| 104 | 108 |
| 109 // This change affects both the old and new layers. |
| 110 if (oldRootScrollerLayer) |
| 111 oldRootScrollerLayer->setNeedsCompositingInputsUpdate(); |
| 112 if (rootScrollerPaintLayer()) |
| 113 rootScrollerPaintLayer()->setNeedsCompositingInputsUpdate(); |
| 114 |
| 115 // The above may not be enough as we need to update existing ancestor |
| 116 // GraphicsLayers. This will force us to rebuild the GraphicsLayer tree. |
| 117 if (LayoutView* layoutView = m_document->layoutView()) { |
| 118 layoutView->compositor() |
| 119 ->setNeedsCompositingUpdate(CompositingUpdateRebuildTree); |
| 120 } |
| 121 |
| 105 m_document->topDocument().rootScrollerController() | 122 m_document->topDocument().rootScrollerController() |
| 106 ->globalRootScrollerMayHaveChanged(); | 123 ->globalRootScrollerMayHaveChanged(); |
| 107 } | 124 } |
| 108 | 125 |
| 109 ScrollableArea* RootScrollerController::scrollableAreaFor( | 126 ScrollableArea* RootScrollerController::scrollableAreaFor( |
| 110 const Element& element) const | 127 const Element& element) const |
| 111 { | 128 { |
| 112 if (!element.layoutObject() || !element.layoutObject()->isBox()) | 129 if (!element.layoutObject() || !element.layoutObject()->isBox()) |
| 113 return nullptr; | 130 return nullptr; |
| 114 | 131 |
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| 165 // no way to get at the ViewportScrollCallback so just return false. | 182 // no way to get at the ViewportScrollCallback so just return false. |
| 166 // TODO(bokan): Make document.rootScroller work in OOPIF. crbug.com/642378. | 183 // TODO(bokan): Make document.rootScroller work in OOPIF. crbug.com/642378. |
| 167 if (!m_document->localOwner()) | 184 if (!m_document->localOwner()) |
| 168 return false; | 185 return false; |
| 169 | 186 |
| 170 RootScrollerController* topDocumentController = | 187 RootScrollerController* topDocumentController = |
| 171 m_document->topDocument().rootScrollerController(); | 188 m_document->topDocument().rootScrollerController(); |
| 172 return topDocumentController->isViewportScrollCallback(callback); | 189 return topDocumentController->isViewportScrollCallback(callback); |
| 173 } | 190 } |
| 174 | 191 |
| 192 PaintLayer* RootScrollerController::rootScrollerPaintLayer() const |
| 193 { |
| 194 if (!m_effectiveRootScroller |
| 195 || !m_effectiveRootScroller->layoutObject() |
| 196 || !m_effectiveRootScroller->layoutObject()->isBox()) |
| 197 return nullptr; |
| 198 |
| 199 LayoutBox* box = toLayoutBox(m_effectiveRootScroller->layoutObject()); |
| 200 PaintLayer* layer = box->layer(); |
| 201 |
| 202 // If the root scroller is the <html> element we do a bit of a fake out beca
use |
| 203 // while <html> has a PaintLayer, scrolling for it is handled by the #docume
nt's |
| 204 // PaintLayer (i.e. the PaintLayerCompositor's root layer). The reason the r
oot |
| 205 // scroller is the <html> layer and not #document is because the latter is a
Node |
| 206 // but not an Element. |
| 207 if (m_effectiveRootScroller->isSameNode(m_document->documentElement())) |
| 208 return layer->compositor()->rootLayer(); |
| 209 |
| 210 return layer; |
| 211 } |
| 212 |
| 175 Element* RootScrollerController::defaultEffectiveRootScroller() | 213 Element* RootScrollerController::defaultEffectiveRootScroller() |
| 176 { | 214 { |
| 177 DCHECK(m_document); | 215 DCHECK(m_document); |
| 178 return m_document->documentElement(); | 216 return m_document->documentElement(); |
| 179 } | 217 } |
| 180 | 218 |
| 181 } // namespace blink | 219 } // namespace blink |
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Chromium Code Reviews
Issue 2289833002:
Disable clipping on root scroller's ancestors. (Closed)
