| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. |
| * All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifndef FontSize_h |
| #define FontSize_h |
| |
| #include "core/CSSValueKeywords.h" |
| #include "wtf/Allocator.h" |
| |
| namespace blink { |
| |
| class Document; |
| |
| enum ESmartMinimumForFontSize { |
| DoNotUseSmartMinimumForFontSize, |
| UseSmartMinimumForFontSize |
| }; |
| |
| class FontSize { |
| STATIC_ONLY(FontSize); |
| |
| public: |
| static float getComputedSizeFromSpecifiedSize( |
| const Document*, |
| float zoomFactor, |
| bool isAbsoluteSize, |
| float specifiedSize, |
| ESmartMinimumForFontSize = UseSmartMinimumForFontSize); |
| |
| // Given a CSS keyword in the range (xx-small to -webkit-xxx-large), this |
| // function returns |
| // values from '1' to '8'. |
| static unsigned keywordSize(CSSValueID valueID) { |
| ASSERT(isValidValueID(valueID)); |
| return valueID - CSSValueXxSmall + 1; |
| } |
| |
| static bool isValidValueID(CSSValueID valueID) { |
| return valueID >= CSSValueXxSmall && valueID <= CSSValueWebkitXxxLarge; |
| } |
| |
| static CSSValueID initialValueID() { return CSSValueMedium; } |
| static unsigned initialKeywordSize() { return keywordSize(initialValueID()); } |
| |
| // Given a keyword size in the range (1 to 8), this function will return |
| // the correct font size scaled relative to the user's default (4). |
| static float fontSizeForKeyword(const Document*, |
| unsigned keyword, |
| bool isMonospace); |
| |
| // Given a font size in pixel, this function will return legacy font size |
| // between 1 and 7. |
| static int legacyFontSize(const Document*, |
| int pixelFontSize, |
| bool isMonospace); |
| }; |
| |
| } // namespace blink |
| |
| #endif // FontSize_h |