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 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 * 20 */ 21 22 #ifndef FontSize_h 23 #define FontSize_h 24 25 #include "core/CSSValueKeywords.h" 26 #include "platform/fonts/FixedPitchFontType.h" 27 28 namespace blink { 29 30 class Document; 31 32 enum ESmartMinimumForFontSize { DoNotUseSmartMinimumForFontSize, UseSmartMinimumForFontFize }; 33 34 class FontSize { 35 private: 36 FontSize() 37 { 38 } 39 40 public: 41 static float getComputedSizeFromSpecifiedSize(const Document*, float zoomFactor, bool isAbsoluteSize, float specifiedSize, ESmartMinimumForFontSize = UseSmartMinimumForFontFize); 42 43 // Given a CSS keyword in the range (xx-small to -webkit-xxx-large), this function returns 44 // values from '1' to '8'. 45 static unsigned keywordSize(CSSValueID valueID) 46 { 47 ASSERT(valueID >= CSSValueXxSmall && valueID <= CSSValueWebkitXxxLarge); 48 return valueID - CSSValueXxSmall + 1; 49 } 50 51 static unsigned initialKeywordSize() { return 4; } // CSSValueMedium 52 53 // Given a keyword size in the range (1 to 8), this function will return 54 // the correct font size scaled relative to the user's default (4). 55 static float fontSizeForKeyword(const Document*, unsigned keyword, FixedPitchFontType); 56 57 // Given a font size in pixel, this function will return legacy font size between 1 and 7. 58 static int legacyFontSize(const Document*, int pixelFontSize, FixedPitchFontType); 59 }; 60 61 } // namespace blink 62 63 #endif // FontSize_h 64
