/platform/external/webkit/WebCore/css/CSSSegmentedFontFace.cpp
https://github.com/aharish/totoro-gb-opensource-update2 · C++ · 135 lines · 93 code · 17 blank · 25 comment · 19 complexity · 4ee23eef81c85b50e8b29a83254adb33 MD5 · raw file
- /*
- * Copyright (C) 2008 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include "config.h"
- #include "CSSSegmentedFontFace.h"
- #include "CSSFontFace.h"
- #include "CSSFontSelector.h"
- #include "FontDescription.h"
- #include "SegmentedFontData.h"
- #include "SimpleFontData.h"
- namespace WebCore {
- CSSSegmentedFontFace::CSSSegmentedFontFace(CSSFontSelector* fontSelector)
- : m_fontSelector(fontSelector)
- {
- }
- CSSSegmentedFontFace::~CSSSegmentedFontFace()
- {
- pruneTable();
- unsigned size = m_fontFaces.size();
- for (unsigned i = 0; i < size; i++)
- m_fontFaces[i]->removedFromSegmentedFontFace(this);
- }
- void CSSSegmentedFontFace::pruneTable()
- {
- // Make sure the glyph page tree prunes out all uses of this custom font.
- if (m_fontDataTable.isEmpty())
- return;
- HashMap<unsigned, SegmentedFontData*>::iterator end = m_fontDataTable.end();
- for (HashMap<unsigned, SegmentedFontData*>::iterator it = m_fontDataTable.begin(); it != end; ++it)
- GlyphPageTreeNode::pruneTreeCustomFontData(it->second);
- deleteAllValues(m_fontDataTable);
- m_fontDataTable.clear();
- }
- bool CSSSegmentedFontFace::isLoaded() const
- {
- unsigned size = m_fontFaces.size();
- for (unsigned i = 0; i < size; i++) {
- if (!m_fontFaces[i]->isLoaded())
- return false;
- }
- return true;
- }
- bool CSSSegmentedFontFace::isValid() const
- {
- unsigned size = m_fontFaces.size();
- for (unsigned i = 0; i < size; i++) {
- if (!m_fontFaces[i]->isValid())
- return false;
- }
- return true;
- }
- void CSSSegmentedFontFace::fontLoaded(CSSFontFace*)
- {
- pruneTable();
- }
- void CSSSegmentedFontFace::appendFontFace(PassRefPtr<CSSFontFace> fontFace)
- {
- pruneTable();
- fontFace->addedToSegmentedFontFace(this);
- m_fontFaces.append(fontFace);
- }
- FontData* CSSSegmentedFontFace::getFontData(const FontDescription& fontDescription)
- {
- if (!isValid())
- return 0;
- FontTraitsMask desiredTraitsMask = fontDescription.traitsMask();
- unsigned hashKey = fontDescription.computedPixelSize() << FontTraitsMaskWidth | desiredTraitsMask;
- SegmentedFontData* fontData = m_fontDataTable.get(hashKey);
- if (fontData)
- return fontData;
- fontData = new SegmentedFontData();
- unsigned size = m_fontFaces.size();
- for (unsigned i = 0; i < size; i++) {
- FontTraitsMask traitsMask = m_fontFaces[i]->traitsMask();
- bool syntheticBold = !(traitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask)) && (desiredTraitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask));
- bool syntheticItalic = !(traitsMask & FontStyleItalicMask) && (desiredTraitsMask & FontStyleItalicMask);
- if (const FontData* faceFontData = m_fontFaces[i]->getFontData(fontDescription, syntheticBold, syntheticItalic)) {
- ASSERT(!faceFontData->isSegmented());
- const Vector<CSSFontFace::UnicodeRange>& ranges = m_fontFaces[i]->ranges();
- unsigned numRanges = ranges.size();
- if (!numRanges)
- fontData->appendRange(FontDataRange(0, 0x7FFFFFFF, static_cast<const SimpleFontData*>(faceFontData)));
- else {
- for (unsigned j = 0; j < numRanges; ++j)
- fontData->appendRange(FontDataRange(ranges[j].from(), ranges[j].to(), static_cast<const SimpleFontData*>(faceFontData)));
- }
- }
- }
- if (fontData->numRanges())
- m_fontDataTable.set(hashKey, fontData);
- else {
- delete fontData;
- fontData = 0;
- }
- return fontData;
- }
- }