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/*
Copyright (C) 2008 Holger Hans Peter Freyther
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
Replacement of the stock FontFallbackList as Qt is going to find us a
replacement font, will do caching and the other stuff we implement in
WebKit.
*/
#include "config.h"
#include "FontFallbackList.h"
#include "Font.h"
#include "FontCache.h"
#include "SegmentedFontData.h"
#include <QDebug>
namespace WebCore {
FontFallbackList::FontFallbackList()
: m_pageZero(0)
, m_cachedPrimarySimpleFontData(0)
, m_fontSelector(0)
, m_familyIndex(0)
, m_pitch(UnknownPitch)
, m_loadingCustomFonts(false)
, m_generation(0)
{
}
void FontFallbackList::invalidate(WTF::PassRefPtr<WebCore::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 = 0;
}
void FontFallbackList::releaseFontData()
{
unsigned numFonts = m_fontList.size();
for (unsigned i = 0; i < numFonts; ++i) {
if (m_fontList[i].second)
delete m_fontList[i].first;
else {
ASSERT(!m_fontList[i].first->isSegmented());
fontCache()->releaseFontData(static_cast<const SimpleFontData*>(m_fontList[i].first));
}
}
}
void FontFallbackList::determinePitch(const WebCore::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 WebCore::Font* _font, unsigned index) const
{
if (index != 0)
return 0;
// Search for the WebCore font that is already in the list
for (int i = m_fontList.size() - 1; i >= 0; --i) {
pair<const FontData*, bool> item = m_fontList[i];
// item.second means that the item was created locally or not
if (!item.second)
return item.first;
}
// Use the FontSelector to get a WebCore font and then fallback to Qt
const FontDescription& description = _font->fontDescription();
const FontFamily* family = &description.family();
while (family) {
if (m_fontSelector) {
FontData* data = m_fontSelector->getFontData(description, family->family());
if (data) {
if (data->isLoading())
m_loadingCustomFonts = true;
if (!data->isCustomFont()) {
// Custom fonts can be freed anytime so we must not hold them
m_fontList.append(pair<const FontData*, bool>(data, false));
}
return data;
}
}
family = family->next();
}
if (m_fontList.size())
return m_fontList[0].first;
const FontData* result = new SimpleFontData(FontPlatformData(description, _font->wordSpacing(), _font->letterSpacing()), true);
m_fontList.append(pair<const FontData*, bool>(result, true));
return result;
}
const FontData* FontFallbackList::fontDataForCharacters(const WebCore::Font* font, const UChar*, int) const
{
return primaryFontData(font);
}
void FontFallbackList::setPlatformFont(const WebCore::FontPlatformData& platformData)
{
m_familyIndex = cAllFamiliesScanned;
}
}
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