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/*
* Copyright (C) 2007, 2008, 2010 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 "CSSFontFaceSource.h"
#include "CachedFont.h"
#include "CSSFontFace.h"
#include "CSSFontSelector.h"
#include "CachedResourceLoader.h"
#include "FontCache.h"
#include "FontDescription.h"
#include "GlyphPageTreeNode.h"
#include "SimpleFontData.h"
#if ENABLE(SVG_FONTS)
#include "FontCustomPlatformData.h"
#include "SVGFontData.h"
#include "SVGFontElement.h"
#include "SVGFontFaceElement.h"
#include "SVGNames.h"
#include "SVGURIReference.h"
#endif
namespace WebCore {
CSSFontFaceSource::CSSFontFaceSource(const String& str, CachedFont* font)
: m_string(str)
, m_font(font)
, m_face(0)
#if ENABLE(SVG_FONTS)
, m_hasExternalSVGFont(false)
#endif
{
if (m_font)
m_font->addClient(this);
}
CSSFontFaceSource::~CSSFontFaceSource()
{
if (m_font)
m_font->removeClient(this);
pruneTable();
}
void CSSFontFaceSource::pruneTable()
{
if (m_fontDataTable.isEmpty())
return;
HashMap<unsigned, SimpleFontData*>::iterator end = m_fontDataTable.end();
for (HashMap<unsigned, SimpleFontData*>::iterator it = m_fontDataTable.begin(); it != end; ++it)
m_face->retireCustomFont(it->second);
m_fontDataTable.clear();
}
bool CSSFontFaceSource::isLoaded() const
{
if (m_font)
return m_font->isLoaded();
return true;
}
bool CSSFontFaceSource::isValid() const
{
if (m_font)
return !m_font->errorOccurred();
return true;
}
void CSSFontFaceSource::fontLoaded(CachedFont*)
{
pruneTable();
if (m_face)
m_face->fontLoaded(this);
}
SimpleFontData* CSSFontFaceSource::getFontData(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic, CSSFontSelector* fontSelector)
{
// If the font hasn't loaded or an error occurred, then we've got nothing.
if (!isValid())
return 0;
#if ENABLE(SVG_FONTS)
if (!m_font && !m_svgFontFaceElement) {
#else
if (!m_font) {
#endif
SimpleFontData* fontData = fontCache()->getCachedFontData(fontDescription, m_string);
// We're local. Just return a SimpleFontData from the normal cache.
return fontData;
}
// See if we have a mapping in our FontData cache.
unsigned hashKey = (fontDescription.computedPixelSize() + 1) << 6 | fontDescription.widthVariant() << 4
| (fontDescription.textOrientation() == TextOrientationUpright ? 8 : 0) | (fontDescription.orientation() == Vertical ? 4 : 0) | (syntheticBold ? 2 : 0) | (syntheticItalic ? 1 : 0);
if (SimpleFontData* cachedData = m_fontDataTable.get(hashKey))
return cachedData;
OwnPtr<SimpleFontData> fontData;
// If we are still loading, then we let the system pick a font.
if (isLoaded()) {
if (m_font) {
#if ENABLE(SVG_FONTS)
if (m_hasExternalSVGFont) {
// For SVG fonts parse the external SVG document, and extract the <font> element.
if (!m_font->ensureSVGFontData())
return 0;
if (!m_externalSVGFontElement)
m_externalSVGFontElement = m_font->getSVGFontById(SVGURIReference::getTarget(m_string));
if (!m_externalSVGFontElement)
return 0;
SVGFontFaceElement* fontFaceElement = 0;
// Select first <font-face> child
for (Node* fontChild = m_externalSVGFontElement->firstChild(); fontChild; fontChild = fontChild->nextSibling()) {
if (fontChild->hasTagName(SVGNames::font_faceTag)) {
fontFaceElement = static_cast<SVGFontFaceElement*>(fontChild);
break;
}
}
if (fontFaceElement) {
if (!m_svgFontFaceElement) {
// We're created using a CSS @font-face rule, that means we're not associated with a SVGFontFaceElement.
// Use the imported <font-face> tag as referencing font-face element for these cases.
m_svgFontFaceElement = fontFaceElement;
}
fontData.set(new SimpleFontData(adoptPtr(new SVGFontData(fontFaceElement)), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic));
}
} else
#endif
{
// Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
if (!m_font->ensureCustomFontData())
return 0;
fontData.set(new SimpleFontData(m_font->platformDataFromCustomData(fontDescription.computedPixelSize(), syntheticBold, syntheticItalic, fontDescription.orientation(),
fontDescription.textOrientation(), fontDescription.widthVariant(), fontDescription.renderingMode()), true, false));
}
} else {
#if ENABLE(SVG_FONTS)
// In-Document SVG Fonts
if (m_svgFontFaceElement)
fontData.set(new SimpleFontData(adoptPtr(new SVGFontData(m_svgFontFaceElement.get())), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic));
#endif
}
} else {
// Kick off the load now.
if (CachedResourceLoader* cachedResourceLoader = fontSelector->cachedResourceLoader())
m_font->beginLoadIfNeeded(cachedResourceLoader);
// FIXME: m_string is a URL so it makes no sense to pass it as a family name.
SimpleFontData* tempData = fontCache()->getCachedFontData(fontDescription, m_string);
if (!tempData)
tempData = fontCache()->getLastResortFallbackFont(fontDescription);
fontData.set(new SimpleFontData(tempData->platformData(), true, true));
}
SimpleFontData* fontDataRawPtr = fontData.leakPtr();
m_fontDataTable.set(hashKey, fontDataRawPtr);
return fontDataRawPtr;
}
#if ENABLE(SVG_FONTS)
SVGFontFaceElement* CSSFontFaceSource::svgFontFaceElement() const
{
return m_svgFontFaceElement.get();
}
void CSSFontFaceSource::setSVGFontFaceElement(PassRefPtr<SVGFontFaceElement> element)
{
m_svgFontFaceElement = element;
}
bool CSSFontFaceSource::isSVGFontFaceSource() const
{
return m_svgFontFaceElement || m_hasExternalSVGFont;
}
#endif
}
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