1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/*
* Copyright (C) 2010 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_ORIENTATION_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_ORIENTATION_H_
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/text/character.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
namespace blink {
enum class FontOrientation : uint8_t {
// Horizontal; i.e., writing-mode: horizontal-tb
kHorizontal = 0,
// Baseline is vertical but use rotated horizontal typography;
// i.e., writing-mode: vertical-*; text-orientation: sideways-*
kVerticalRotated = 1,
// Vertical with upright CJK and rotated non-CJK;
// i.e., writing-mode: vertical-*, text-orientation: mixed
kVerticalMixed = 2,
// Vertical with all upright;
// i.e., writing-mode: vertical-*, text-orientation: upright
kVerticalUpright = 3,
};
const unsigned kFontOrientationBitCount = 2;
const unsigned kFontOrientationAnyUprightMask = 2;
inline bool IsVerticalAnyUpright(FontOrientation orientation) {
return static_cast<unsigned>(orientation) & kFontOrientationAnyUprightMask;
}
inline bool IsVerticalNonCJKUpright(FontOrientation orientation) {
return orientation == FontOrientation::kVerticalUpright;
}
inline bool IsVerticalUpright(FontOrientation orientation, UChar32 character) {
return orientation == FontOrientation::kVerticalUpright ||
(orientation == FontOrientation::kVerticalMixed &&
Character::IsUprightInMixedVertical(character));
}
inline bool IsVerticalBaseline(FontOrientation orientation) {
return orientation != FontOrientation::kHorizontal;
}
inline FontOrientation AdjustOrientationForCharacterInMixedVertical(
FontOrientation orientation,
UChar32 character) {
if (orientation != FontOrientation::kVerticalMixed)
return orientation;
return Character::IsUprightInMixedVertical(character)
? FontOrientation::kVerticalUpright
: FontOrientation::kVerticalRotated;
}
PLATFORM_EXPORT String ToString(FontOrientation);
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_ORIENTATION_H_
|
