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| 1 /* | 1 /* |
| 2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
| 6 * met: | 6 * met: |
| 7 * | 7 * |
| 8 * * Redistributions of source code must retain the above copyright | 8 * * 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 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 */ | 29 */ |
| 30 | 30 |
| 31 #ifndef PaintLayerStackingNodeIterator_h | 31 #ifndef PaintLayerStackingNodeIterator_h |
| 32 #define PaintLayerStackingNodeIterator_h | 32 #define PaintLayerStackingNodeIterator_h |
| 33 | 33 |
| 34 #include "wtf/Allocator.h" | 34 #include "platform/wtf/Allocator.h" |
| 35 #include "wtf/Noncopyable.h" | 35 #include "platform/wtf/Noncopyable.h" |
| 36 | 36 |
| 37 namespace blink { | 37 namespace blink { |
| 38 | 38 |
| 39 enum ChildrenIteration { | 39 enum ChildrenIteration { |
| 40 kNegativeZOrderChildren = 1, | 40 kNegativeZOrderChildren = 1, |
| 41 // Normal flow children are not mandated by CSS 2.1 but are an artifact of | 41 // Normal flow children are not mandated by CSS 2.1 but are an artifact of |
| 42 // our implementation: we allocate PaintLayers for elements that | 42 // our implementation: we allocate PaintLayers for elements that |
| 43 // are not treated as stacking contexts and thus we need to walk them | 43 // are not treated as stacking contexts and thus we need to walk them |
| 44 // during painting and hit-testing. | 44 // during painting and hit-testing. |
| 45 kNormalFlowChildren = 1 << 1, | 45 kNormalFlowChildren = 1 << 1, |
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| 90 | 90 |
| 91 const PaintLayerStackingNode& root_; | 91 const PaintLayerStackingNode& root_; |
| 92 unsigned remaining_children_; | 92 unsigned remaining_children_; |
| 93 int index_; | 93 int index_; |
| 94 PaintLayer* current_normal_flow_child_; | 94 PaintLayer* current_normal_flow_child_; |
| 95 }; | 95 }; |
| 96 | 96 |
| 97 } // namespace blink | 97 } // namespace blink |
| 98 | 98 |
| 99 #endif // PaintLayerStackingNodeIterator_h | 99 #endif // PaintLayerStackingNodeIterator_h |
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