1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. 4 * Copyright (C) 2013 Google Inc. All rights reserved. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public License 17 * along with this library; see the file COPYING.LIB. If not, write to 18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 * 21 */ 22 23 #ifndef FontBuilder_h 24 #define FontBuilder_h 25 26 #include "core/CSSValueKeywords.h" 27 #include "core/css/FontSize.h" 28 #include "platform/fonts/FontDescription.h" 29 #include "platform/heap/Handle.h" 30 #include "wtf/PassRefPtr.h" 31 32 namespace blink { 33 34 class CSSValue; 35 class FontSelector; 36 class RenderStyle; 37 38 class FontDescriptionChangeScope; 39 40 class FontBuilder { 41 STACK_ALLOCATED(); 42 WTF_MAKE_NONCOPYABLE(FontBuilder); 43 public: 44 FontBuilder(); 45 46 // FIXME: The name is probably wrong, but matches StyleResolverState callsite for consistency. 47 void initForStyleResolve(const Document&, RenderStyle*); 48 49 void setInitial(float effectiveZoom); 50 51 void didChangeFontParameters(bool); 52 53 void inheritFrom(const FontDescription&); 54 void fromSystemFont(CSSValueID, float effectiveZoom); 55 56 void setFontFamilyInitial(); 57 void setFontFamilyInherit(const FontDescription&); 58 void setFontFamilyValue(CSSValue*); 59 60 void setWeight(FontWeight); 61 void setSize(const FontDescription::Size&); 62 void setStretch(FontStretch); 63 void setFeatureSettings(PassRefPtr<FontFeatureSettings>); 64 void setScript(const String& locale); 65 void setStyle(FontStyle); 66 void setVariant(FontVariant); 67 void setVariantLigatures(const FontDescription::VariantLigatures&); 68 void setTextRendering(TextRenderingMode); 69 void setKerning(FontDescription::Kerning); 70 void setFontSmoothing(FontSmoothingMode); 71 72 // FIXME: These need to just vend a Font object eventually. 73 void createFont(PassRefPtrWillBeRawPtr<FontSelector>, const RenderStyle* parentStyle, RenderStyle*); 74 75 void createFontForDocument(PassRefPtrWillBeRawPtr<FontSelector>, RenderStyle*); 76 77 // FIXME: These should not be necessary eventually. 78 void setFontDirty(bool fontDirty) { m_fontDirty = fontDirty; } 79 // FIXME: This is only used by an ASSERT in StyleResolver. Remove? 80 bool fontDirty() const { return m_fontDirty; } 81 82 static FontFeatureSettings* initialFeatureSettings() { return nullptr; } 83 static FontDescription::GenericFamilyType initialGenericFamily() { return FontDescription::NoFamily; } 84 static FontDescription::Size initialSize() { return FontDescription::Size(FontSize::initialKeywordSize(), 0.0f, false); } 85 static TextRenderingMode initialTextRendering() { return AutoTextRendering; } 86 static FontVariant initialVariant() { return FontVariantNormal; } 87 static FontDescription::VariantLigatures initialVariantLigatures() { return FontDescription::VariantLigatures(); } 88 static FontStyle initialStyle() { return FontStyleNormal; } 89 static FontDescription::Kerning initialKerning() { return FontDescription::AutoKerning; } 90 static FontSmoothingMode initialFontSmoothing() { return AutoSmoothing; } 91 static FontStretch initialStretch() { return FontStretchNormal; } 92 static FontWeight initialWeight() { return FontWeightNormal; } 93 94 friend class FontDescriptionChangeScope; 95 96 private: 97 98 // FIXME: "size" arg should be first for consistency with other similar functions. 99 void setSize(FontDescription&, const FontDescription::Size&); 100 void checkForOrientationChange(RenderStyle*); 101 // This function fixes up the default font size if it detects that the current generic font family has changed. -dwh 102 void checkForGenericFamilyChange(RenderStyle*, const RenderStyle* parentStyle); 103 void updateComputedSize(RenderStyle*, const RenderStyle* parentStyle); 104 void updateComputedSize(FontDescription&, RenderStyle*); 105 106 float getComputedSizeFromSpecifiedSize(FontDescription&, float effectiveZoom, float specifiedSize); 107 108 RawPtrWillBeMember<const Document> m_document; 109 // FIXME: This member is here on a short-term lease. The plan is to remove 110 // any notion of RenderStyle from here, allowing FontBuilder to build Font objects 111 // directly, rather than as a byproduct of calling RenderStyle::setFontDescription. 112 // FontDescriptionChangeScope should be the only consumer of this member. 113 // If you're using it, U R DOIN IT WRONG. 114 RenderStyle* m_style; 115 116 // Fontbuilder is responsbile for creating the Font() 117 // object on RenderStyle from various other font-related 118 // properties on RenderStyle. Whenever one of those 119 // is changed, FontBuilder tracks the need to update 120 // style->font() with this bool. 121 bool m_fontDirty; 122 123 friend class FontBuilderTest; 124 }; 125 126 } 127 128 #endif 129
