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1 // Copyright 2017 The Chromium Authors. All rights reserved. | 1 // Copyright 2017 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 #include "core/layout/ng/inline/ng_line_height_metrics.h" | 5 #include "core/layout/ng/inline/ng_line_height_metrics.h" |
6 | 6 |
7 #include "core/style/ComputedStyle.h" | 7 #include "core/style/ComputedStyle.h" |
8 | 8 |
9 namespace blink { | 9 namespace blink { |
10 | 10 |
11 NGLineHeightMetrics::NGLineHeightMetrics(const ComputedStyle& style, | 11 NGLineHeightMetrics::NGLineHeightMetrics(const ComputedStyle& style, |
12 FontBaseline baseline_type) { | 12 FontBaseline baseline_type) { |
13 const SimpleFontData* font_data = style.GetFont().PrimaryFont(); | 13 const SimpleFontData* font_data = style.GetFont().PrimaryFont(); |
14 DCHECK(font_data); | 14 DCHECK(font_data); |
15 Initialize(font_data->GetFontMetrics(), baseline_type); | 15 Initialize(font_data->GetFontMetrics(), baseline_type); |
16 } | 16 } |
17 | 17 |
18 NGLineHeightMetrics::NGLineHeightMetrics(const FontMetrics& font_metrics, | 18 NGLineHeightMetrics::NGLineHeightMetrics(const FontMetrics& font_metrics, |
19 FontBaseline baseline_type) { | 19 FontBaseline baseline_type) { |
20 Initialize(font_metrics, baseline_type); | 20 Initialize(font_metrics, baseline_type); |
21 } | 21 } |
22 | 22 |
23 void NGLineHeightMetrics::Initialize(const FontMetrics& font_metrics, | 23 void NGLineHeightMetrics::Initialize(const FontMetrics& font_metrics, |
24 FontBaseline baseline_type) { | 24 FontBaseline baseline_type) { |
25 ascent = font_metrics.FixedAscent(baseline_type); | 25 ascent = font_metrics.FixedAscent(baseline_type); |
26 descent = font_metrics.FixedDescent(baseline_type); | 26 descent = font_metrics.FixedDescent(baseline_type); |
27 } | 27 } |
28 | 28 |
29 void NGLineHeightMetrics::AddLeading(LayoutUnit line_height) { | 29 void NGLineHeightMetrics::AddLeading(LayoutUnit line_height) { |
| 30 DCHECK(!IsEmpty()); |
30 LayoutUnit half_leading = (line_height - (ascent + descent)) / 2; | 31 LayoutUnit half_leading = (line_height - (ascent + descent)) / 2; |
31 // TODO(kojii): floor() is to make text dump compatible with legacy test | 32 // TODO(kojii): floor() is to make text dump compatible with legacy test |
32 // results. Revisit when we paint. | 33 // results. Revisit when we paint. |
33 ascent += half_leading.Floor(); | 34 ascent += half_leading.Floor(); |
34 descent = line_height - ascent; | 35 descent = line_height - ascent; |
35 } | 36 } |
36 | 37 |
| 38 void NGLineHeightMetrics::Move(LayoutUnit delta) { |
| 39 DCHECK(!IsEmpty()); |
| 40 ascent -= delta; |
| 41 descent += delta; |
| 42 } |
| 43 |
37 void NGLineHeightMetrics::Unite(const NGLineHeightMetrics& other) { | 44 void NGLineHeightMetrics::Unite(const NGLineHeightMetrics& other) { |
38 ascent = std::max(ascent, other.ascent); | 45 ascent = std::max(ascent, other.ascent); |
39 descent = std::max(descent, other.descent); | 46 descent = std::max(descent, other.descent); |
40 } | 47 } |
41 | 48 |
42 } // namespace blink | 49 } // namespace blink |
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