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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #include "core/layout/ng/geometry/ng_box_strut.h" | |
6 | |
7 #include "wtf/text/WTFString.h" | |
8 | |
9 namespace blink { | |
10 | |
11 bool NGBoxStrut::IsEmpty() const { | |
12 return *this == NGBoxStrut(); | |
13 } | |
14 | |
15 bool NGBoxStrut::operator==(const NGBoxStrut& other) const { | |
16 return std::tie(other.inline_start, other.inline_end, other.block_start, | |
17 other.block_end) == | |
18 std::tie(inline_start, inline_end, block_start, block_end); | |
19 } | |
20 | |
21 // Converts physical dimensions to logical ones per | |
22 // https://drafts.csswg.org/css-writing-modes-3/#logical-to-physical | |
23 NGBoxStrut NGPhysicalBoxStrut::ConvertToLogical(NGWritingMode writing_mode, | |
24 TextDirection direction) const { | |
25 NGBoxStrut strut; | |
26 switch (writing_mode) { | |
27 case kHorizontalTopBottom: | |
28 strut = {left, right, top, bottom}; | |
29 break; | |
30 case kVerticalRightLeft: | |
31 case kSidewaysRightLeft: | |
32 strut = {top, bottom, right, left}; | |
33 break; | |
34 case kVerticalLeftRight: | |
35 strut = {top, bottom, left, right}; | |
36 break; | |
37 case kSidewaysLeftRight: | |
38 strut = {bottom, top, left, right}; | |
39 break; | |
40 } | |
41 if (direction == TextDirection::kRtl) | |
42 std::swap(strut.inline_start, strut.inline_end); | |
43 return strut; | |
44 } | |
45 | |
46 String NGBoxStrut::ToString() const { | |
47 return String::format("Inline: (%d %d) Block: (%d %d)", inline_start.toInt(), | |
48 inline_end.toInt(), block_start.toInt(), | |
49 block_end.toInt()); | |
50 } | |
51 | |
52 std::ostream& operator<<(std::ostream& stream, const NGBoxStrut& value) { | |
53 return stream << value.ToString(); | |
54 } | |
55 | |
56 } // namespace blink | |
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