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1 /* | 1 /* |
2 * Copyright (C) 2003, 2006, 2008, 2009, 2010, 2011 Apple Inc. All rights reserv
ed. | 2 * Copyright (C) 2003, 2006, 2008, 2009, 2010, 2011 Apple Inc. All rights reserv
ed. |
3 * Copyright (C) 2008 Holger Hans Peter Freyther | 3 * Copyright (C) 2008 Holger Hans Peter Freyther |
4 * Copyright (C) 2014 Google Inc. All rights reserved. | 4 * Copyright (C) 2014 Google Inc. All rights reserved. |
5 * | 5 * |
6 * This library is free software; you can redistribute it and/or | 6 * This library is free software; you can redistribute it and/or |
7 * modify it under the terms of the GNU Library General Public | 7 * modify it under the terms of the GNU Library General Public |
8 * License as published by the Free Software Foundation; either | 8 * License as published by the Free Software Foundation; either |
9 * version 2 of the License, or (at your option) any later version. | 9 * version 2 of the License, or (at your option) any later version. |
10 * | 10 * |
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42 , m_currentCharacter(0) | 42 , m_currentCharacter(0) |
43 , m_runWidthSoFar(0) | 43 , m_runWidthSoFar(0) |
44 { | 44 { |
45 // If the padding is non-zero, count the number of spaces in the run | 45 // If the padding is non-zero, count the number of spaces in the run |
46 // and divide that by the padding for per space addition. | 46 // and divide that by the padding for per space addition. |
47 m_expansion = m_textRun.expansion(); | 47 m_expansion = m_textRun.expansion(); |
48 if (!m_expansion) { | 48 if (!m_expansion) { |
49 m_expansionPerOpportunity = 0; | 49 m_expansionPerOpportunity = 0; |
50 } else { | 50 } else { |
51 bool isAfterExpansion = m_isAfterExpansion; | 51 bool isAfterExpansion = m_isAfterExpansion; |
52 unsigned expansionOpportunityCount = m_textRun.is8Bit() ? Character::exp
ansionOpportunityCount(m_textRun.characters8(), m_textRun.length(), m_textRun.di
rection(), isAfterExpansion, m_textRun.textJustify()) : Character::expansionOppo
rtunityCount(m_textRun.characters16(), m_textRun.length(), m_textRun.direction()
, isAfterExpansion, m_textRun.textJustify()); | 52 unsigned expansionOpportunityCount = m_textRun.is8Bit() ? Character::exp
ansionOpportunityCount(m_textRun.characters8(), m_textRun.length(), m_textRun.di
rection(), isAfterExpansion, m_textRun.getTextJustify()) : Character::expansionO
pportunityCount(m_textRun.characters16(), m_textRun.length(), m_textRun.directio
n(), isAfterExpansion, m_textRun.getTextJustify()); |
53 if (isAfterExpansion && !m_textRun.allowsTrailingExpansion()) | 53 if (isAfterExpansion && !m_textRun.allowsTrailingExpansion()) |
54 expansionOpportunityCount--; | 54 expansionOpportunityCount--; |
55 | 55 |
56 if (!expansionOpportunityCount) | 56 if (!expansionOpportunityCount) |
57 m_expansionPerOpportunity = 0; | 57 m_expansionPerOpportunity = 0; |
58 else | 58 else |
59 m_expansionPerOpportunity = m_expansion / expansionOpportunityCount; | 59 m_expansionPerOpportunity = m_expansion / expansionOpportunityCount; |
60 } | 60 } |
61 } | 61 } |
62 | 62 |
63 GlyphData SimpleShaper::glyphDataForCharacter(CharacterData& charData, bool norm
alizeSpace) | 63 GlyphData SimpleShaper::glyphDataForCharacter(CharacterData& charData, bool norm
alizeSpace) |
64 { | 64 { |
65 ASSERT(m_font); | 65 ASSERT(m_font); |
66 return m_font->glyphDataForCharacter(charData.character, m_textRun.rtl(), no
rmalizeSpace); | 66 return m_font->glyphDataForCharacter(charData.character, m_textRun.rtl(), no
rmalizeSpace); |
67 } | 67 } |
68 | 68 |
69 float SimpleShaper::characterWidth(UChar32 character, const GlyphData& glyphData
) const | 69 float SimpleShaper::characterWidth(UChar32 character, const GlyphData& glyphData
) const |
70 { | 70 { |
71 const SimpleFontData* fontData = glyphData.fontData; | 71 const SimpleFontData* fontData = glyphData.fontData; |
72 ASSERT(fontData); | 72 ASSERT(fontData); |
73 | 73 |
74 if (UNLIKELY(character == tabulationCharacter && m_textRun.allowTabs())) | 74 if (UNLIKELY(character == tabulationCharacter && m_textRun.allowTabs())) |
75 return m_font->tabWidth(*fontData, m_textRun.tabSize(), m_textRun.xPos()
+ m_runWidthSoFar); | 75 return m_font->tabWidth(*fontData, m_textRun.getTabSize(), m_textRun.xPo
s() + m_runWidthSoFar); |
76 | 76 |
77 float width = fontData->widthForGlyph(glyphData.glyph); | 77 float width = fontData->widthForGlyph(glyphData.glyph); |
78 | 78 |
79 // SVG uses horizontalGlyphStretch(), when textLength is used to stretch/squ
eeze text. | 79 // SVG uses horizontalGlyphStretch(), when textLength is used to stretch/squ
eeze text. |
80 if (UNLIKELY(m_textRun.horizontalGlyphStretch() != 1)) | 80 if (UNLIKELY(m_textRun.horizontalGlyphStretch() != 1)) |
81 width *= m_textRun.horizontalGlyphStretch(); | 81 width *= m_textRun.horizontalGlyphStretch(); |
82 | 82 |
83 return width; | 83 return width; |
84 } | 84 } |
85 | 85 |
86 float SimpleShaper::adjustSpacing(float width, const CharacterData& charData) | 86 float SimpleShaper::adjustSpacing(float width, const CharacterData& charData) |
87 { | 87 { |
88 // Account for letter-spacing. | 88 // Account for letter-spacing. |
89 if (width) | 89 if (width) |
90 width += m_font->fontDescription().letterSpacing(); | 90 width += m_font->fontDescription().letterSpacing(); |
91 | 91 |
92 bool isExpansionOpportunity = Character::treatAsSpace(charData.character) ||
(m_textRun.textJustify() == TextJustifyDistribute); | 92 bool isExpansionOpportunity = Character::treatAsSpace(charData.character) ||
(m_textRun.getTextJustify() == TextJustifyDistribute); |
93 if (isExpansionOpportunity || (m_textRun.textJustify() == TextJustifyAuto &&
Character::isCJKIdeographOrSymbol(charData.character))) { | 93 if (isExpansionOpportunity || (m_textRun.getTextJustify() == TextJustifyAuto
&& Character::isCJKIdeographOrSymbol(charData.character))) { |
94 // Distribute the run's total expansion evenly over all expansion opport
unities in the run. | 94 // Distribute the run's total expansion evenly over all expansion opport
unities in the run. |
95 if (m_expansion) { | 95 if (m_expansion) { |
96 if (!isExpansionOpportunity && !m_isAfterExpansion) { | 96 if (!isExpansionOpportunity && !m_isAfterExpansion) { |
97 // Take the expansion opportunity before this ideograph. | 97 // Take the expansion opportunity before this ideograph. |
98 m_expansion -= m_expansionPerOpportunity; | 98 m_expansion -= m_expansionPerOpportunity; |
99 m_runWidthSoFar += m_expansionPerOpportunity; | 99 m_runWidthSoFar += m_expansionPerOpportunity; |
100 } | 100 } |
101 if (m_textRun.allowsTrailingExpansion() | 101 if (m_textRun.allowsTrailingExpansion() |
102 || (m_textRun.ltr() && charData.characterOffset + charData.clust
erLength < static_cast<size_t>(m_textRun.length())) | 102 || (m_textRun.ltr() && charData.characterOffset + charData.clust
erLength < static_cast<size_t>(m_textRun.length())) |
103 || (m_textRun.rtl() && charData.characterOffset)) { | 103 || (m_textRun.rtl() && charData.characterOffset)) { |
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218 float initialWidth = m_runWidthSoFar; | 218 float initialWidth = m_runWidthSoFar; |
219 | 219 |
220 if (!advance(m_currentCharacter + 1)) | 220 if (!advance(m_currentCharacter + 1)) |
221 return false; | 221 return false; |
222 | 222 |
223 width = m_runWidthSoFar - initialWidth; | 223 width = m_runWidthSoFar - initialWidth; |
224 return true; | 224 return true; |
225 } | 225 } |
226 | 226 |
227 } // namespace blink | 227 } // namespace blink |
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