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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef NGUnits_h | 5 #ifndef NGUnits_h |
6 #define NGUnits_h | 6 #define NGUnits_h |
7 | 7 |
8 #include "core/CoreExport.h" | 8 #include "core/CoreExport.h" |
9 #include "core/layout/ng/ng_direction.h" | 9 #include "core/layout/ng/ng_direction.h" |
10 #include "core/layout/ng/ng_writing_mode.h" | 10 #include "core/layout/ng/ng_writing_mode.h" |
11 #include "platform/LayoutUnit.h" | 11 #include "platform/LayoutUnit.h" |
12 #include "wtf/text/WTFString.h" | 12 #include "wtf/text/WTFString.h" |
13 | 13 |
14 namespace blink { | 14 namespace blink { |
15 | 15 |
16 class LayoutUnit; | 16 class LayoutUnit; |
17 struct NGPhysicalOffset; | 17 struct NGPhysicalOffset; |
18 struct NGPhysicalSize; | 18 struct NGPhysicalSize; |
19 | 19 |
20 struct NGLogicalSize { | 20 struct NGLogicalSize { |
21 NGLogicalSize() {} | 21 NGLogicalSize() {} |
22 NGLogicalSize(LayoutUnit inline_size, LayoutUnit block_size) | 22 NGLogicalSize(LayoutUnit inline_size, LayoutUnit block_size) |
23 : inline_size(inline_size), block_size(block_size) {} | 23 : inline_size(inline_size), block_size(block_size) {} |
24 | 24 |
25 LayoutUnit inline_size; | 25 LayoutUnit inline_size; |
26 LayoutUnit block_size; | 26 LayoutUnit block_size; |
27 | 27 |
28 NGPhysicalSize ConvertToPhysical(NGWritingMode mode) const; | 28 NGPhysicalSize ConvertToPhysical(NGWritingMode mode) const; |
29 bool operator==(const NGLogicalSize& other) const; | 29 bool operator==(const NGLogicalSize& other) const; |
30 | |
31 bool IsEmpty() const { | |
32 return inline_size == LayoutUnit() || block_size == LayoutUnit(); | |
33 } | |
34 }; | 30 }; |
35 | 31 |
36 // NGLogicalOffset is the position of a rect (typically a fragment) relative to | 32 // NGLogicalOffset is the position of a rect (typically a fragment) relative to |
37 // its parent rect in the logical coordinate system. | 33 // its parent rect in the logical coordinate system. |
38 struct NGLogicalOffset { | 34 struct NGLogicalOffset { |
39 NGLogicalOffset() {} | 35 NGLogicalOffset() {} |
40 NGLogicalOffset(LayoutUnit inline_offset, LayoutUnit block_offset) | 36 NGLogicalOffset(LayoutUnit inline_offset, LayoutUnit block_offset) |
41 : inline_offset(inline_offset), block_offset(block_offset) {} | 37 : inline_offset(inline_offset), block_offset(block_offset) {} |
42 | 38 |
43 LayoutUnit inline_offset; | 39 LayoutUnit inline_offset; |
44 LayoutUnit block_offset; | 40 LayoutUnit block_offset; |
45 | 41 |
46 // Converts a logical offset to a physical offset. See: | 42 // Converts a logical offset to a physical offset. See: |
47 // https://drafts.csswg.org/css-writing-modes-3/#logical-to-physical | 43 // https://drafts.csswg.org/css-writing-modes-3/#logical-to-physical |
48 // @param container_size the size of the rect (typically a fragment). | 44 // @param container_size the size of the rect (typically a fragment). |
49 // @param inner_size the size of the inner rect (typically a child fragment). | 45 // @param inner_size the size of the inner rect (typically a child fragment). |
50 CORE_EXPORT NGPhysicalOffset | 46 CORE_EXPORT NGPhysicalOffset |
51 ConvertToPhysical(NGWritingMode mode, | 47 ConvertToPhysical(NGWritingMode mode, |
52 NGDirection direction, | 48 NGDirection direction, |
53 NGPhysicalSize container_size, | 49 NGPhysicalSize container_size, |
54 NGPhysicalSize inner_size) const; | 50 NGPhysicalSize inner_size) const; |
55 bool operator==(const NGLogicalOffset& other) const; | 51 bool operator==(const NGLogicalOffset& other) const; |
56 | 52 |
57 NGLogicalOffset operator+(const NGLogicalOffset& other) const; | 53 NGLogicalOffset operator+(const NGLogicalOffset& other) const; |
58 | 54 |
59 NGLogicalOffset& operator+=(const NGLogicalOffset& other); | 55 NGLogicalOffset& operator+=(const NGLogicalOffset& other); |
60 | |
61 bool operator>(const NGLogicalOffset& other) const; | |
62 bool operator>=(const NGLogicalOffset& other) const; | |
63 | |
64 bool operator<(const NGLogicalOffset& other) const; | |
65 bool operator<=(const NGLogicalOffset& other) const; | |
66 | |
67 String ToString() const; | |
68 }; | 56 }; |
69 | 57 |
70 CORE_EXPORT inline std::ostream& operator<<(std::ostream& os, | |
71 const NGLogicalOffset& value) { | |
72 return os << value.ToString(); | |
73 } | |
74 | |
75 // NGPhysicalOffset is the position of a rect (typically a fragment) relative to | 58 // NGPhysicalOffset is the position of a rect (typically a fragment) relative to |
76 // its parent rect in the physical coordinate system. | 59 // its parent rect in the physical coordinate system. |
77 struct NGPhysicalOffset { | 60 struct NGPhysicalOffset { |
78 NGPhysicalOffset() {} | 61 NGPhysicalOffset() {} |
79 NGPhysicalOffset(LayoutUnit left, LayoutUnit top) : left(left), top(top) {} | 62 NGPhysicalOffset(LayoutUnit left, LayoutUnit top) : left(left), top(top) {} |
80 | 63 |
81 LayoutUnit left; | 64 LayoutUnit left; |
82 LayoutUnit top; | 65 LayoutUnit top; |
83 }; | 66 }; |
84 | 67 |
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230 | 213 |
231 // Struct to represent a simple edge that has start and end. | 214 // Struct to represent a simple edge that has start and end. |
232 struct NGEdge { | 215 struct NGEdge { |
233 LayoutUnit start; | 216 LayoutUnit start; |
234 LayoutUnit end; | 217 LayoutUnit end; |
235 }; | 218 }; |
236 | 219 |
237 } // namespace blink | 220 } // namespace blink |
238 | 221 |
239 #endif // NGUnits_h | 222 #endif // NGUnits_h |
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