1 /* 2 * Copyright (C) 2013 Google, Inc. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 * 19 */ 20 21 #ifndef CSSCustomFontData_h 22 #define CSSCustomFontData_h 23 24 #include "core/css/CSSFontFaceSource.h" 25 #include "platform/fonts/CustomFontData.h" 26 27 namespace blink { 28 29 class CSSCustomFontData FINAL : public CustomFontData { 30 public: 31 enum FallbackVisibility { InvisibleFallback, VisibleFallback }; 32 33 static PassRefPtr<CSSCustomFontData> create(RemoteFontFaceSource* source, FallbackVisibility visibility) 34 { 35 return adoptRef(new CSSCustomFontData(source, visibility)); 36 } 37 38 virtual ~CSSCustomFontData() { } 39 40 virtual bool shouldSkipDrawing() const OVERRIDE 41 { 42 if (m_fontFaceSource) 43 m_fontFaceSource->paintRequested(); 44 return m_fallbackVisibility == InvisibleFallback && m_isLoading; 45 } 46 47 virtual void beginLoadIfNeeded() const OVERRIDE 48 { 49 if (!m_isLoading && m_fontFaceSource) { 50 m_isLoading = true; 51 m_fontFaceSource->beginLoadIfNeeded(); 52 } 53 } 54 55 virtual bool isLoading() const OVERRIDE { return m_isLoading; } 56 virtual bool isLoadingFallback() const OVERRIDE { return true; } 57 virtual void clearFontFaceSource() OVERRIDE { m_fontFaceSource = 0; } 58 59 private: 60 CSSCustomFontData(RemoteFontFaceSource* source, FallbackVisibility visibility) 61 : m_fontFaceSource(source) 62 , m_fallbackVisibility(visibility) 63 , m_isLoading(false) 64 { 65 if (source) 66 m_isLoading = source->isLoading(); 67 } 68 69 RemoteFontFaceSource* m_fontFaceSource; 70 FallbackVisibility m_fallbackVisibility; 71 mutable bool m_isLoading; 72 }; 73 74 } 75 76 #endif // CSSCustomFontData_h 77