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1 /* | 1 /* |
2 * Copyright (C) 2012 Apple Inc. All rights reserved. | 2 * Copyright (C) 2012 Apple 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 | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
(...skipping 17 matching lines...) Expand all Loading... |
28 | 28 |
29 #include "core/rendering/RenderFlowThread.h" | 29 #include "core/rendering/RenderFlowThread.h" |
30 | 30 |
31 namespace WebCore { | 31 namespace WebCore { |
32 | 32 |
33 RenderRegionSet::RenderRegionSet(Element* element, RenderFlowThread* flowThread) | 33 RenderRegionSet::RenderRegionSet(Element* element, RenderFlowThread* flowThread) |
34 : RenderRegion(element, flowThread) | 34 : RenderRegion(element, flowThread) |
35 { | 35 { |
36 } | 36 } |
37 | 37 |
38 void RenderRegionSet::installFlowThread() | |
39 { | |
40 // We don't have to do anything, since we were able to connect the flow thre
ad | |
41 // in the constructor. | |
42 } | |
43 | |
44 void RenderRegionSet::expandToEncompassFlowThreadContentsIfNeeded() | 38 void RenderRegionSet::expandToEncompassFlowThreadContentsIfNeeded() |
45 { | 39 { |
46 // Whenever the last region is a set, it always expands its region rect to c
onsume all | 40 // Whenever the last region is a set, it always expands its region rect to c
onsume all |
47 // of the flow thread content. This is because it is always capable of gener
ating an | 41 // of the flow thread content. This is because it is always capable of gener
ating an |
48 // infinite number of boxes in order to hold all of the remaining content. | 42 // infinite number of boxes in order to hold all of the remaining content. |
49 LayoutRect rect(flowThreadPortionRect()); | 43 LayoutRect rect(flowThreadPortionRect()); |
50 | 44 |
51 // Get the offset within the flow thread in its block progression direction.
Then get the | 45 // Get the offset within the flow thread in its block progression direction.
Then get the |
52 // flow thread's remaining logical height including its overflow and expand
our rect | 46 // flow thread's remaining logical height including its overflow and expand
our rect |
53 // to encompass that remaining height and overflow. The idea is that we will
generate | 47 // to encompass that remaining height and overflow. The idea is that we will
generate |
54 // additional columns and pages to hold that overflow, since people do write
bad | 48 // additional columns and pages to hold that overflow, since people do write
bad |
55 // content like <body style="height:0px"> in multi-column layouts. | 49 // content like <body style="height:0px"> in multi-column layouts. |
56 bool isHorizontal = flowThread()->isHorizontalWritingMode(); | 50 bool isHorizontal = flowThread()->isHorizontalWritingMode(); |
57 LayoutUnit logicalTopOffset = isHorizontal ? rect.y() : rect.x(); | 51 LayoutUnit logicalTopOffset = isHorizontal ? rect.y() : rect.x(); |
58 LayoutRect layoutRect = flowThread()->layoutOverflowRect(); | 52 LayoutRect layoutRect = flowThread()->layoutOverflowRect(); |
59 LayoutUnit logicalHeightWithOverflow = (isHorizontal ? layoutRect.maxY() : l
ayoutRect.maxX()) - logicalTopOffset; | 53 LayoutUnit logicalHeightWithOverflow = (isHorizontal ? layoutRect.maxY() : l
ayoutRect.maxX()) - logicalTopOffset; |
60 setFlowThreadPortionRect(LayoutRect(rect.x(), rect.y(), isHorizontal ? rect.
width() : logicalHeightWithOverflow, isHorizontal ? logicalHeightWithOverflow :
rect.height())); | 54 setFlowThreadPortionRect(LayoutRect(rect.x(), rect.y(), isHorizontal ? rect.
width() : logicalHeightWithOverflow, isHorizontal ? logicalHeightWithOverflow :
rect.height())); |
61 } | 55 } |
62 | 56 |
63 } | 57 } |
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