author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 11 May 2010 17:13:44 +0300 | |
branch | RCL_3 |
changeset 70 | 8bfb9186a8b8 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
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* its contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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#include "config.h" |
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#include "FontFallbackList.h" |
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|
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#include "Font.h" |
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#include "FontCache.h" |
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namespace WebCore { |
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FontFallbackList::FontFallbackList() |
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: m_familyIndex(0), m_pitch(UnknownPitch) |
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{ |
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} |
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void FontFallbackList::invalidate() |
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{ |
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m_fontList.clear(); |
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m_familyIndex = 0; |
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m_pitch = UnknownPitch; |
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} |
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void FontFallbackList::determinePitch(const Font* font) const |
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{ |
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m_pitch = primaryFont(font)->pitch(); |
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} |
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const FontData* FontFallbackList::fontDataAt(const Font* font, unsigned realizedFontIndex) const |
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{ |
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if (realizedFontIndex < m_fontList.size()) |
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return m_fontList[realizedFontIndex]; // This fallback font is already in our list. |
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|
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// Make sure we're not passing in some crazy value here. |
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ASSERT(realizedFontIndex == m_fontList.size()); |
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if (m_familyIndex == cAllFamiliesScanned) |
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return 0; |
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|
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// Ask the font cache for the font data. |
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// We are obtaining this font for the first time. We keep track of the families we've looked at before |
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// in |m_familyIndex|, so that we never scan the same spot in the list twice. getFontData will adjust our |
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// |m_familyIndex| as it scans for the right font to make. |
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const FontData* result = FontCache::getFontData(*font, m_familyIndex); |
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if (result) |
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m_fontList.append(result); |
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return result; |
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} |
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const FontData* FontFallbackList::fontDataForCharacters(const Font* font, const UChar* characters, int length) const |
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{ |
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// This method is only called when the primary font does not contain the characters we need. |
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// Begin our search at position 1. |
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unsigned realizedFontIndex = 1; |
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const FontData* fontData = fontDataAt(font, realizedFontIndex); |
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while (fontData && !fontData->containsCharacters(characters, length)) |
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fontData = fontDataAt(font, ++realizedFontIndex); |
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if (!fontData) |
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fontData = FontCache::getFontDataForCharacters(*font, characters, length); |
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return fontData; |
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} |
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void FontFallbackList::setPlatformFont(const FontPlatformData& platformData) |
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{ |
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m_familyIndex = cAllFamiliesScanned; |
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m_fontList.append(FontCache::getCachedFontData(&platformData)); |
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} |
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} |