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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 #ifndef NGBoxStrut_h | |
6 #define NGBoxStrut_h | |
7 | |
8 #include "core/CoreExport.h" | |
9 #include "core/layout/ng/ng_writing_mode.h" | |
mstensho (USE GERRIT)
2017/02/28 12:19:47
Random thought (not something you necessarily need
eae
2017/02/28 12:26:34
Ideally long term (post NG) all of these files sho
mstensho (USE GERRIT)
2017/02/28 12:31:28
Acknowledged.
Makes sense. Thanks.
| |
10 #include "platform/LayoutUnit.h" | |
11 #include "platform/text/TextDirection.h" | |
12 | |
13 namespace blink { | |
14 | |
15 struct NGBoxStrut; | |
16 | |
17 // Struct to store physical dimensions, independent of writing mode and | |
18 // direction. | |
19 // See https://drafts.csswg.org/css-writing-modes-3/#abstract-box | |
20 struct CORE_EXPORT NGPhysicalBoxStrut { | |
21 LayoutUnit left; | |
22 LayoutUnit right; | |
23 LayoutUnit top; | |
24 LayoutUnit bottom; | |
25 NGBoxStrut ConvertToLogical(NGWritingMode, TextDirection) const; | |
26 }; | |
27 | |
28 // This struct is used for storing margins, borders or padding of a box on all | |
29 // four edges. | |
30 struct CORE_EXPORT NGBoxStrut { | |
31 LayoutUnit inline_start; | |
32 LayoutUnit inline_end; | |
33 LayoutUnit block_start; | |
34 LayoutUnit block_end; | |
35 | |
36 LayoutUnit InlineSum() const { return inline_start + inline_end; } | |
37 LayoutUnit BlockSum() const { return block_start + block_end; } | |
38 | |
39 bool IsEmpty() const; | |
40 | |
41 // The following two operators exist primarily to have an easy way to access | |
42 // the sum of border and padding. | |
43 NGBoxStrut& operator+=(const NGBoxStrut& other) { | |
44 inline_start += other.inline_start; | |
45 inline_end += other.inline_end; | |
46 block_start += other.block_start; | |
47 block_end += other.block_end; | |
48 return *this; | |
49 } | |
50 | |
51 NGBoxStrut operator+(const NGBoxStrut& other) { | |
52 NGBoxStrut result(*this); | |
53 result += other; | |
54 return result; | |
55 } | |
56 | |
57 bool operator==(const NGBoxStrut& other) const; | |
58 | |
59 String ToString() const; | |
60 }; | |
61 | |
62 CORE_EXPORT std::ostream& operator<<(std::ostream&, const NGBoxStrut&); | |
63 | |
64 } // namespace blink | |
65 | |
66 #endif // NGBoxStrut_h | |
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