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/*
* 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::isValid() const
{
// Valid if at least one font face is valid.
unsigned size = m_fontFaces.size();
for (unsigned i = 0; i < size; i++) {
if (m_fontFaces[i]->isValid())
return true;
}
return false;
}
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++) {
if (!m_fontFaces[i]->isValid())
continue;
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 SimpleFontData* 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, faceFontData));
else {
for (unsigned j = 0; j < numRanges; ++j)
fontData->appendRange(FontDataRange(ranges[j].from(), ranges[j].to(), faceFontData));
}
}
}
if (fontData->numRanges())
m_fontDataTable.set(hashKey, fontData);
else {
delete fontData;
fontData = 0;
}
return fontData;
}
}
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