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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 NGExclusion_h | 5 #ifndef NGExclusion_h |
6 #define NGExclusion_h | 6 #define NGExclusion_h |
7 | 7 |
8 #include "core/CoreExport.h" | 8 #include "core/CoreExport.h" |
9 #include "core/layout/ng/geometry/ng_logical_rect.h" | 9 #include "core/layout/ng/geometry/ng_logical_rect.h" |
10 #include "wtf/Vector.h" | 10 #include "wtf/Vector.h" |
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24 kFloatRight = 2 | 24 kFloatRight = 2 |
25 }; | 25 }; |
26 | 26 |
27 // Rectangle in logical coordinates the represents this exclusion. | 27 // Rectangle in logical coordinates the represents this exclusion. |
28 NGLogicalRect rect; | 28 NGLogicalRect rect; |
29 | 29 |
30 // Type of this exclusion. | 30 // Type of this exclusion. |
31 Type type; | 31 Type type; |
32 | 32 |
33 bool operator==(const NGExclusion& other) const; | 33 bool operator==(const NGExclusion& other) const; |
| 34 |
34 String ToString() const; | 35 String ToString() const; |
| 36 |
| 37 // Tries to combine the current exclusion with {@code other} exclusion and |
| 38 // returns true if successful. |
| 39 // We can combine 2 exclusions if they |
| 40 // - adjoining to each other and have the same exclusion type |
| 41 // - {@code other} exclusion shadows the current one. |
| 42 // That's because it's not allowed to position anything in the shadowed |
| 43 // area. |
| 44 // |
| 45 // Example: |
| 46 // <div id="SS" style="float: left; height: 10px; width: 10px"></div> |
| 47 // <div id="BB" style="float: left; height: 20px; width: 20px"></div> |
| 48 // +----------------+ |
| 49 // |SSBB |
| 50 // |**BB |
| 51 // We combine SS and BB exclusions including the shadowed area (**). |
| 52 bool MaybeCombineWith(const NGExclusion& other); |
35 }; | 53 }; |
36 | 54 |
37 CORE_EXPORT std::ostream& operator<<(std::ostream&, const NGExclusion&); | 55 CORE_EXPORT std::ostream& operator<<(std::ostream&, const NGExclusion&); |
38 | 56 |
39 struct CORE_EXPORT NGExclusions { | 57 struct CORE_EXPORT NGExclusions { |
40 NGExclusions(); | 58 NGExclusions(); |
41 NGExclusions(const NGExclusions& other); | 59 NGExclusions(const NGExclusions& other); |
42 | 60 |
43 Vector<std::unique_ptr<const NGExclusion>> storage; | 61 Vector<std::unique_ptr<const NGExclusion>> storage; |
44 | 62 |
45 // Last left/right float exclusions are used to enforce the top edge alignment | 63 // Last left/right float exclusions are used to enforce the top edge alignment |
46 // rule for floats and for the support of CSS "clear" property. | 64 // rule for floats and for the support of CSS "clear" property. |
47 const NGExclusion* last_left_float; // Owned by storage. | 65 const NGExclusion* last_left_float; // Owned by storage. |
48 const NGExclusion* last_right_float; // Owned by storage. | 66 const NGExclusion* last_right_float; // Owned by storage. |
49 | 67 |
50 NGExclusions& operator=(const NGExclusions& other); | 68 NGExclusions& operator=(const NGExclusions& other); |
51 | 69 |
52 void Add(const NGExclusion& exclusion); | 70 void Add(const NGExclusion& exclusion); |
53 }; | 71 }; |
54 | 72 |
55 } // namespace blink | 73 } // namespace blink |
56 | 74 |
57 #endif // NGExclusion_h | 75 #endif // NGExclusion_h |
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