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/*
* Copyright (C) 2006 Apple Computer, 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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 "FontFallbackList.h"
#include "Font.h"
#include "FontCache.h"
#include "SegmentedFontData.h"
namespace WebCore {
FontFallbackList::FontFallbackList()
: m_pageZero(0)
, m_cachedPrimarySimpleFontData(0)
, m_fontSelector(0)
, m_familyIndex(0)
, m_pitch(UnknownPitch)
, m_loadingCustomFonts(false)
, m_generation(fontCache()->generation())
{
}
void FontFallbackList::invalidate(PassRefPtr<FontSelector> fontSelector)
{
releaseFontData();
m_fontList.clear();
m_pageZero = 0;
m_pages.clear();
m_cachedPrimarySimpleFontData = 0;
m_familyIndex = 0;
m_pitch = UnknownPitch;
m_loadingCustomFonts = false;
m_fontSelector = fontSelector;
m_generation = fontCache()->generation();
}
void FontFallbackList::releaseFontData()
{
unsigned numFonts = m_fontList.size();
for (unsigned i = 0; i < numFonts; ++i) {
if (!m_fontList[i].second) {
ASSERT(!m_fontList[i].first->isSegmented());
fontCache()->releaseFontData(static_cast<const SimpleFontData*>(m_fontList[i].first));
}
}
}
void FontFallbackList::determinePitch(const Font* font) const
{
const FontData* fontData = primaryFontData(font);
if (!fontData->isSegmented())
m_pitch = static_cast<const SimpleFontData*>(fontData)->pitch();
else {
const SegmentedFontData* segmentedFontData = static_cast<const SegmentedFontData*>(fontData);
unsigned numRanges = segmentedFontData->numRanges();
if (numRanges == 1)
m_pitch = segmentedFontData->rangeAt(0).fontData()->pitch();
else
m_pitch = VariablePitch;
}
}
const FontData* FontFallbackList::fontDataAt(const Font* font, unsigned realizedFontIndex) const
{
if (realizedFontIndex < m_fontList.size())
return m_fontList[realizedFontIndex].first; // This fallback font is already in our list.
// Make sure we're not passing in some crazy value here.
ASSERT(realizedFontIndex == m_fontList.size());
if (m_familyIndex == cAllFamiliesScanned)
return 0;
// Ask the font cache for the font data.
// We are obtaining this font for the first time. We keep track of the families we've looked at before
// in |m_familyIndex|, so that we never scan the same spot in the list twice. getFontData will adjust our
// |m_familyIndex| as it scans for the right font to make.
ASSERT(fontCache()->generation() == m_generation);
const FontData* result = fontCache()->getFontData(*font, m_familyIndex, m_fontSelector.get());
if (result) {
m_fontList.append(pair<const FontData*, bool>(result, result->isCustomFont()));
if (result->isLoading())
m_loadingCustomFonts = true;
}
return result;
}
void FontFallbackList::setPlatformFont(const FontPlatformData& platformData)
{
m_familyIndex = cAllFamiliesScanned;
ASSERT(fontCache()->generation() == m_generation);
const FontData* fontData = fontCache()->getCachedFontData(&platformData);
m_fontList.append(pair<const FontData*, bool>(fontData, fontData->isCustomFont()));
}
}
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