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| 1 /* | |
| 2 * Copyright (c) 2006, 2007, 2008, 2009, Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #include "config.h" | |
| 32 #include "core/platform/graphics/win/UniscribeHelperTextRun.h" | |
| 33 | |
| 34 #include "core/platform/graphics/Font.h" | |
| 35 #include "core/platform/graphics/SimpleFontData.h" | |
| 36 #include "core/platform/graphics/win/FontPlatformDataWin.h" | |
| 37 #include "platform/graphics/TextRun.h" | |
| 38 | |
| 39 namespace WebCore { | |
| 40 | |
| 41 UniscribeHelperTextRun::UniscribeHelperTextRun(const TextRun& run, | |
| 42 const Font& font) | |
| 43 : UniscribeHelper(0, run.length(), run.rtl(), | |
| 44 font.primaryFont()->platformData().hfont(), | |
| 45 font.primaryFont()->platformData().scriptCache(), | |
| 46 font.primaryFont()->platformData().scriptFontProperties(), | |
| 47 font.primaryFont()->spaceGlyph()) | |
| 48 , m_font(&font) | |
| 49 , m_fontIndex(0) | |
| 50 { | |
| 51 if (run.is8Bit()) { | |
| 52 m_stringFor8BitRun = String::make16BitFrom8BitSource(run.characters8(),
run.length()); | |
| 53 setInput(m_stringFor8BitRun.characters16()); | |
| 54 } else { | |
| 55 setInput(run.characters16()); | |
| 56 } | |
| 57 | |
| 58 setDirectionalOverride(run.directionalOverride()); | |
| 59 setLetterSpacing(font.letterSpacing()); | |
| 60 setSpaceWidth(font.spaceWidth()); | |
| 61 setWordSpacing(font.wordSpacing()); | |
| 62 setAscent(font.fontMetrics().ascent()); | |
| 63 setRangeProperties(font.fontDescription().featureSettings()); | |
| 64 | |
| 65 init(); | |
| 66 | |
| 67 // Expansion is the amount to add to make justification happen. This | |
| 68 // should be done after Init() so all the runs are already measured. | |
| 69 if (run.expansion() > 0) | |
| 70 justify(run.expansion()); | |
| 71 } | |
| 72 | |
| 73 UniscribeHelperTextRun::UniscribeHelperTextRun( | |
| 74 const wchar_t* input, | |
| 75 int inputLength, | |
| 76 bool isRtl, | |
| 77 HFONT hfont, | |
| 78 SCRIPT_CACHE* scriptCache, | |
| 79 SCRIPT_FONTPROPERTIES* fontProperties) | |
| 80 : UniscribeHelper(input, inputLength, isRtl, hfont, | |
| 81 scriptCache, fontProperties, 0) | |
| 82 , m_font(0) | |
| 83 , m_fontIndex(-1) | |
| 84 { | |
| 85 } | |
| 86 | |
| 87 void UniscribeHelperTextRun::tryToPreloadFont(HFONT font) | |
| 88 { | |
| 89 // Ask the browser to get the font metrics for this font. | |
| 90 // That will preload the font and it should now be accessible | |
| 91 // from the renderer. | |
| 92 FontPlatformData::ensureFontLoaded(font); | |
| 93 } | |
| 94 | |
| 95 bool UniscribeHelperTextRun::nextWinFontData( | |
| 96 HFONT& hfont, | |
| 97 SCRIPT_CACHE*& scriptCache, | |
| 98 SCRIPT_FONTPROPERTIES*& fontProperties, | |
| 99 int& ascent, | |
| 100 WORD& spaceGlyph) | |
| 101 { | |
| 102 // This check is necessary because NextWinFontData can be called again | |
| 103 // after we already ran out of fonts. fontDataAt behaves in a strange | |
| 104 // manner when the difference between param passed and # of fonts stored in | |
| 105 // blink::Font is larger than one. We can avoid this check by setting | |
| 106 // font_index_ to # of elements in hfonts_ when we run out of font. In that | |
| 107 // case, we'd have to go through a couple of more checks before returning | |
| 108 // false. | |
| 109 if (m_fontIndex == -1 || !m_font) | |
| 110 return false; | |
| 111 | |
| 112 // If the font data for a fallback font requested is not yet retrieved, add | |
| 113 // them to our vectors. Note that '>' rather than '>=' is used to test that | |
| 114 // condition. primaryFont is not stored in hfonts_, and friends so that | |
| 115 // indices for fontDataAt and our vectors for font data are 1 off from each | |
| 116 // other. That is, when fully populated, hfonts_ and friends have one font | |
| 117 // fewer than what's contained in font_. | |
| 118 if (static_cast<size_t>(++m_fontIndex) > m_hfonts.size()) { | |
| 119 const FontData *fontData = m_font->fontDataAt(m_fontIndex); | |
| 120 if (!fontData) { | |
| 121 // Ran out of fonts. | |
| 122 m_fontIndex = -1; | |
| 123 return false; | |
| 124 } | |
| 125 | |
| 126 // FIXME: this won't work for SegmentedFontData | |
| 127 // http://crbug.com/6425 | |
| 128 const SimpleFontData* simpleFontData = | |
| 129 fontData->fontDataForCharacter(' '); | |
| 130 | |
| 131 m_hfonts.append(simpleFontData->platformData().hfont()); | |
| 132 m_scriptCaches.append(simpleFontData->platformData().scriptCache()); | |
| 133 m_fontProperties.append(simpleFontData->platformData().scriptFontPropert
ies()); | |
| 134 m_ascents.append(simpleFontData->fontMetrics().ascent()); | |
| 135 m_spaceGlyphs.append(simpleFontData->spaceGlyph()); | |
| 136 } | |
| 137 | |
| 138 hfont = m_hfonts[m_fontIndex - 1]; | |
| 139 scriptCache = m_scriptCaches[m_fontIndex - 1]; | |
| 140 fontProperties = m_fontProperties[m_fontIndex - 1]; | |
| 141 ascent = m_ascents[m_fontIndex - 1]; | |
| 142 spaceGlyph = m_spaceGlyphs[m_fontIndex - 1]; | |
| 143 return true; | |
| 144 } | |
| 145 | |
| 146 void UniscribeHelperTextRun::resetFontIndex() | |
| 147 { | |
| 148 m_fontIndex = 0; | |
| 149 } | |
| 150 | |
| 151 } // namespace WebCore | |
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Chromium Code Reviews
Issue 99103006:
Moving GraphicsContext and dependencies from core to platform. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk