Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 215 insertions, 0 deletions

diff --git a/Source/WebCore/css/CSSFontFaceSource.cpp b/Source/WebCore/css/CSSFontFaceSource.cpp
new file mode 100644
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+++ b/Source/WebCore/css/CSSFontFaceSource.cpp
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+/*
+ * Copyright (C) 2007, 2008, 2010, 2011 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 "Document.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;
+
+    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 (!m_font
+#if ENABLE(SVG_FONTS)
+            && !m_svgFontFaceElement
+#endif
+    ) {
+        // We're local. Just return a SimpleFontData from the normal cache.
+        return fontCache()->getCachedFontData(fontDescription, m_string);
+    }
+
+    // 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);
+
+    SimpleFontData*& cachedData = m_fontDataTable.add(hashKey, 0).first->second;
+    if (cachedData)
+        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) {
+                    String fragmentIdentifier;
+                    size_t start = m_string.find('#');
+                    if (start != notFound)
+                        fragmentIdentifier = m_string.string().substring(start + 1);
+                    m_externalSVGFontElement = m_font->getSVGFontById(fragmentIdentifier);
+                }
+
+                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 = adoptPtr(new SimpleFontData(SVGFontData::create(fontFaceElement), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic));
+                }
+            } else
+#endif
+            {
+                // Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
+                if (!m_font->ensureCustomFontData())
+                    return 0;
+
+                fontData = adoptPtr(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 = adoptPtr(new SimpleFontData(SVGFontData::create(m_svgFontFaceElement.get()), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic));
+#endif
+        }
+    } else {
+        // Kick off the load. Do it soon rather than now, because we may be in the middle of layout,
+        // and the loader may invoke arbitrary delegate or event handler code.
+        fontSelector->beginLoadingFontSoon(m_font.get());
+
+        // This temporary font is not retained and should not be returned.
+        FontCachePurgePreventer fontCachePurgePreventer;
+        SimpleFontData* temporaryFont = fontCache()->getNonRetainedLastResortFallbackFont(fontDescription);
+        fontData = adoptPtr(new SimpleFontData(temporaryFont->platformData(), true, true));
+    }
+
+    if (Document* document = fontSelector->document()) {
+        cachedData = fontData.get();
+        document->registerCustomFont(fontData.release());
+    }
+
+    return cachedData;
+}
+
+#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
+
+}