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1 /* | 1 /* |
2 * Copyright (C) 2009, 2010 Apple Inc. All rights reserved. | 2 * Copyright (C) 2009, 2010 Apple Inc. All rights reserved. |
3 * Copyright (C) Research In Motion Limited 2010. All rights reserved. | 3 * Copyright (C) Research In Motion Limited 2010. All rights reserved. |
4 * | 4 * |
5 * Redistribution and use in source and binary forms, with or without | 5 * Redistribution and use in source and binary forms, with or without |
6 * modification, are permitted provided that the following conditions | 6 * modification, are permitted provided that the following conditions |
7 * are met: | 7 * are met: |
8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
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29 #include "core/dom/AXObjectCache.h" | 29 #include "core/dom/AXObjectCache.h" |
30 #include "core/layout/LayoutCounter.h" | 30 #include "core/layout/LayoutCounter.h" |
31 #include "core/layout/LayoutObject.h" | 31 #include "core/layout/LayoutObject.h" |
32 #include "core/layout/LayoutView.h" | 32 #include "core/layout/LayoutView.h" |
33 #include "core/paint/ObjectPaintInvalidator.h" | 33 #include "core/paint/ObjectPaintInvalidator.h" |
34 | 34 |
35 namespace blink { | 35 namespace blink { |
36 | 36 |
37 void LayoutObjectChildList::destroyLeftoverChildren() { | 37 void LayoutObjectChildList::destroyLeftoverChildren() { |
38 while (firstChild()) { | 38 while (firstChild()) { |
39 // List markers are owned by their enclosing list and so don't get destroyed
by this container. | 39 // List markers are owned by their enclosing list and so don't get destroyed |
| 40 // by this container. |
40 if (firstChild()->isListMarker()) { | 41 if (firstChild()->isListMarker()) { |
41 firstChild()->remove(); | 42 firstChild()->remove(); |
42 continue; | 43 continue; |
43 } | 44 } |
44 | 45 |
45 // Destroy any anonymous children remaining in the layout tree, as well as i
mplicit (shadow) DOM elements like those used in the engine-based text fields. | 46 // Destroy any anonymous children remaining in the layout tree, as well as |
| 47 // implicit (shadow) DOM elements like those used in the engine-based text |
| 48 // fields. |
46 if (firstChild()->node()) | 49 if (firstChild()->node()) |
47 firstChild()->node()->setLayoutObject(nullptr); | 50 firstChild()->node()->setLayoutObject(nullptr); |
48 firstChild()->destroy(); | 51 firstChild()->destroy(); |
49 } | 52 } |
50 } | 53 } |
51 | 54 |
52 LayoutObject* LayoutObjectChildList::removeChildNode(LayoutObject* owner, | 55 LayoutObject* LayoutObjectChildList::removeChildNode(LayoutObject* owner, |
53 LayoutObject* oldChild, | 56 LayoutObject* oldChild, |
54 bool notifyLayoutObject) { | 57 bool notifyLayoutObject) { |
55 ASSERT(oldChild->parent() == owner); | 58 ASSERT(oldChild->parent() == owner); |
56 ASSERT(this == owner->virtualChildren()); | 59 ASSERT(this == owner->virtualChildren()); |
57 | 60 |
58 if (oldChild->isFloatingOrOutOfFlowPositioned()) | 61 if (oldChild->isFloatingOrOutOfFlowPositioned()) |
59 toLayoutBox(oldChild)->removeFloatingOrPositionedChildFromBlockLists(); | 62 toLayoutBox(oldChild)->removeFloatingOrPositionedChildFromBlockLists(); |
60 | 63 |
61 if (!owner->documentBeingDestroyed()) { | 64 if (!owner->documentBeingDestroyed()) { |
62 // So that we'll get the appropriate dirty bit set (either that a normal flo
w child got yanked or | 65 // So that we'll get the appropriate dirty bit set (either that a normal |
63 // that a positioned child got yanked). We also issue paint invalidations, s
o that the area exposed when the child | 66 // flow child got yanked or that a positioned child got yanked). We also |
| 67 // issue paint invalidations, so that the area exposed when the child |
64 // disappears gets paint invalidated properly. | 68 // disappears gets paint invalidated properly. |
65 if (notifyLayoutObject && oldChild->everHadLayout()) | 69 if (notifyLayoutObject && oldChild->everHadLayout()) |
66 oldChild->setNeedsLayoutAndPrefWidthsRecalc( | 70 oldChild->setNeedsLayoutAndPrefWidthsRecalc( |
67 LayoutInvalidationReason::RemovedFromLayout); | 71 LayoutInvalidationReason::RemovedFromLayout); |
68 invalidatePaintOnRemoval(*oldChild); | 72 invalidatePaintOnRemoval(*oldChild); |
69 } | 73 } |
70 | 74 |
71 // If we have a line box wrapper, delete it. | 75 // If we have a line box wrapper, delete it. |
72 if (oldChild->isBox()) | 76 if (oldChild->isBox()) |
73 toLayoutBox(oldChild)->deleteLineBoxWrapper(); | 77 toLayoutBox(oldChild)->deleteLineBoxWrapper(); |
74 | 78 |
75 if (!owner->documentBeingDestroyed()) { | 79 if (!owner->documentBeingDestroyed()) { |
76 // If oldChild is the start or end of the selection, then clear the selectio
n to | 80 // If oldChild is the start or end of the selection, then clear the |
77 // avoid problems of invalid pointers. | 81 // selection to avoid problems of invalid pointers. |
78 // FIXME: The FrameSelection should be responsible for this when it | 82 // FIXME: The FrameSelection should be responsible for this when it |
79 // is notified of DOM mutations. | 83 // is notified of DOM mutations. |
80 if (oldChild->isSelectionBorder()) | 84 if (oldChild->isSelectionBorder()) |
81 owner->view()->clearSelection(); | 85 owner->view()->clearSelection(); |
82 | 86 |
83 owner->notifyOfSubtreeChange(); | 87 owner->notifyOfSubtreeChange(); |
84 | 88 |
85 if (notifyLayoutObject) { | 89 if (notifyLayoutObject) { |
86 LayoutCounter::layoutObjectSubtreeWillBeDetached(oldChild); | 90 LayoutCounter::layoutObjectSubtreeWillBeDetached(oldChild); |
87 oldChild->willBeRemovedFromTree(); | 91 oldChild->willBeRemovedFromTree(); |
88 } else if (oldChild->isBox() && | 92 } else if (oldChild->isBox() && |
89 toLayoutBox(oldChild)->isOrthogonalWritingModeRoot()) { | 93 toLayoutBox(oldChild)->isOrthogonalWritingModeRoot()) { |
90 toLayoutBox(oldChild)->unmarkOrthogonalWritingModeRoot(); | 94 toLayoutBox(oldChild)->unmarkOrthogonalWritingModeRoot(); |
91 } | 95 } |
92 } | 96 } |
93 | 97 |
94 // WARNING: There should be no code running between willBeRemovedFromTree and
the actual removal below. | 98 // WARNING: There should be no code running between willBeRemovedFromTree and |
95 // This is needed to avoid race conditions where willBeRemovedFromTree would d
irty the tree's structure | 99 // the actual removal below. |
96 // and the code running here would force an untimely rebuilding, leaving |oldC
hild| dangling. | 100 // This is needed to avoid race conditions where willBeRemovedFromTree would |
| 101 // dirty the tree's structure and the code running here would force an |
| 102 // untimely rebuilding, leaving |oldChild| dangling. |
97 | 103 |
98 if (oldChild->previousSibling()) | 104 if (oldChild->previousSibling()) |
99 oldChild->previousSibling()->setNextSibling(oldChild->nextSibling()); | 105 oldChild->previousSibling()->setNextSibling(oldChild->nextSibling()); |
100 if (oldChild->nextSibling()) | 106 if (oldChild->nextSibling()) |
101 oldChild->nextSibling()->setPreviousSibling(oldChild->previousSibling()); | 107 oldChild->nextSibling()->setPreviousSibling(oldChild->previousSibling()); |
102 | 108 |
103 if (firstChild() == oldChild) | 109 if (firstChild() == oldChild) |
104 m_firstChild = oldChild->nextSibling(); | 110 m_firstChild = oldChild->nextSibling(); |
105 if (lastChild() == oldChild) | 111 if (lastChild() == oldChild) |
106 m_lastChild = oldChild->previousSibling(); | 112 m_lastChild = oldChild->previousSibling(); |
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126 ASSERT(!newChild->parent()); | 132 ASSERT(!newChild->parent()); |
127 ASSERT(this == owner->virtualChildren()); | 133 ASSERT(this == owner->virtualChildren()); |
128 ASSERT(!owner->isLayoutBlockFlow() || | 134 ASSERT(!owner->isLayoutBlockFlow() || |
129 (!newChild->isTableSection() && !newChild->isTableRow() && | 135 (!newChild->isTableSection() && !newChild->isTableRow() && |
130 !newChild->isTableCell())); | 136 !newChild->isTableCell())); |
131 | 137 |
132 while (beforeChild && beforeChild->parent() && beforeChild->parent() != owner) | 138 while (beforeChild && beforeChild->parent() && beforeChild->parent() != owner) |
133 beforeChild = beforeChild->parent(); | 139 beforeChild = beforeChild->parent(); |
134 | 140 |
135 // This should never happen, but if it does prevent layout tree corruption | 141 // This should never happen, but if it does prevent layout tree corruption |
136 // where child->parent() ends up being owner but child->nextSibling()->parent(
) | 142 // where child->parent() ends up being owner but |
137 // is not owner. | 143 // child->nextSibling()->parent() is not owner. |
138 if (beforeChild && beforeChild->parent() != owner) { | 144 if (beforeChild && beforeChild->parent() != owner) { |
139 ASSERT_NOT_REACHED(); | 145 ASSERT_NOT_REACHED(); |
140 return; | 146 return; |
141 } | 147 } |
142 | 148 |
143 newChild->setParent(owner); | 149 newChild->setParent(owner); |
144 | 150 |
145 if (firstChild() == beforeChild) | 151 if (firstChild() == beforeChild) |
146 m_firstChild = newChild; | 152 m_firstChild = newChild; |
147 | 153 |
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172 // If the inserted node is currently marked as needing to notify children then | 178 // If the inserted node is currently marked as needing to notify children then |
173 // we have to propagate that mark up the tree. | 179 // we have to propagate that mark up the tree. |
174 if (newChild->wasNotifiedOfSubtreeChange()) | 180 if (newChild->wasNotifiedOfSubtreeChange()) |
175 owner->notifyAncestorsOfSubtreeChange(); | 181 owner->notifyAncestorsOfSubtreeChange(); |
176 | 182 |
177 newChild->setNeedsLayoutAndPrefWidthsRecalc( | 183 newChild->setNeedsLayoutAndPrefWidthsRecalc( |
178 LayoutInvalidationReason::AddedToLayout); | 184 LayoutInvalidationReason::AddedToLayout); |
179 newChild->setShouldDoFullPaintInvalidation( | 185 newChild->setShouldDoFullPaintInvalidation( |
180 PaintInvalidationLayoutObjectInsertion); | 186 PaintInvalidationLayoutObjectInsertion); |
181 if (!owner->normalChildNeedsLayout()) | 187 if (!owner->normalChildNeedsLayout()) |
182 owner | 188 owner->setChildNeedsLayout(); // We may supply the static position for an |
183 ->setChildNeedsLayout(); // We may supply the static position for an ab
solute positioned child. | 189 // absolute positioned child. |
184 | 190 |
185 if (!owner->documentBeingDestroyed()) | 191 if (!owner->documentBeingDestroyed()) |
186 owner->notifyOfSubtreeChange(); | 192 owner->notifyOfSubtreeChange(); |
187 | 193 |
188 if (AXObjectCache* cache = owner->document().axObjectCache()) | 194 if (AXObjectCache* cache = owner->document().axObjectCache()) |
189 cache->childrenChanged(owner); | 195 cache->childrenChanged(owner); |
190 } | 196 } |
191 | 197 |
192 void LayoutObjectChildList::invalidatePaintOnRemoval(LayoutObject& oldChild) { | 198 void LayoutObjectChildList::invalidatePaintOnRemoval(LayoutObject& oldChild) { |
193 if (!oldChild.isRooted()) | 199 if (!oldChild.isRooted()) |
194 return; | 200 return; |
195 if (oldChild.isBody()) | 201 if (oldChild.isBody()) |
196 oldChild.view()->setShouldDoFullPaintInvalidation(); | 202 oldChild.view()->setShouldDoFullPaintInvalidation(); |
197 ObjectPaintInvalidator paintInvalidator(oldChild); | 203 ObjectPaintInvalidator paintInvalidator(oldChild); |
198 paintInvalidator.slowSetPaintingLayerNeedsRepaint(); | 204 paintInvalidator.slowSetPaintingLayerNeedsRepaint(); |
199 paintInvalidator.invalidatePaintOfPreviousPaintInvalidationRect( | 205 paintInvalidator.invalidatePaintOfPreviousPaintInvalidationRect( |
200 oldChild.containerForPaintInvalidation(), | 206 oldChild.containerForPaintInvalidation(), |
201 PaintInvalidationLayoutObjectRemoval); | 207 PaintInvalidationLayoutObjectRemoval); |
202 } | 208 } |
203 | 209 |
204 } // namespace blink | 210 } // namespace blink |
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