/platform/external/webkit/WebCore/css/CSSFontFaceSource.cpp
https://github.com/aharish/totoro-gb-opensource-update2 · C++ · 193 lines · 130 code · 27 blank · 36 comment · 29 complexity · ab4ca530821a3ab1fa24efbe1b318dd3 MD5 · raw file
- /*
- * Copyright (C) 2007, 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 "CSSFontFaceSource.h"
- #include "CachedFont.h"
- #include "CSSFontFace.h"
- #include "CSSFontSelector.h"
- #include "DocLoader.h"
- #include "FontCache.h"
- #include "FontDescription.h"
- #include "GlyphPageTreeNode.h"
- #include "SimpleFontData.h"
- #if ENABLE(SVG_FONTS)
- #include "FontCustomPlatformData.h"
- #include "HTMLNames.h"
- #include "SVGFontData.h"
- #include "SVGFontElement.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_svgFontFaceElement(0)
- #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)
- GlyphPageTreeNode::pruneTreeCustomFontData(it->second);
- deleteAllValues(m_fontDataTable);
- 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() << 2 | (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_font->isSVGFont()) {
- // 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;
- }
- SVGFontData* svgFontData = new SVGFontData(fontFaceElement);
- fontData.set(new SimpleFontData(m_font->platformDataFromCustomData(fontDescription.computedPixelSize(), syntheticBold, syntheticItalic, fontDescription.renderingMode()), true, false, svgFontData));
- }
- } 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.renderingMode()), true, false));
- }
- } else {
- #if ENABLE(SVG_FONTS)
- // In-Document SVG Fonts
- if (m_svgFontFaceElement) {
- SVGFontData* svgFontData = new SVGFontData(m_svgFontFaceElement);
- fontData.set(new SimpleFontData(FontPlatformData(fontDescription.computedPixelSize(), syntheticBold, syntheticItalic), true, false, svgFontData));
- }
- #endif
- }
- } else {
- // Kick off the load now.
- if (DocLoader* docLoader = fontSelector->docLoader())
- m_font->beginLoadIfNeeded(docLoader);
- // 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));
- }
- m_fontDataTable.set(hashKey, fontData.get());
- return fontData.release();
- }
- }