1 files changed, 140 insertions, 0 deletions
diff --git a/WebCore/css/CSSSegmentedFontFace.cpp b/WebCore/css/CSSSegmentedFontFace.cpp
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+++ b/WebCore/css/CSSSegmentedFontFace.cpp
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+/*
+ * Copyright (C) 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 "CSSSegmentedFontFace.h"
+
+#include "CSSFontFace.h"
+#include "CSSFontSelector.h"
+#include "FontDescription.h"
+#include "SegmentedFontData.h"
+#include "SimpleFontData.h"
+
+namespace WebCore {
+
+CSSSegmentedFontFace::CSSSegmentedFontFace(CSSFontSelector* fontSelector)
+    : RefCounted<CSSSegmentedFontFace>(0)
+    , m_fontSelector(fontSelector)
+{
+}
+
+CSSSegmentedFontFace::~CSSSegmentedFontFace()
+{
+    pruneTable();
+}
+
+void CSSSegmentedFontFace::pruneTable()
+{
+    // Make sure the glyph page tree prunes out all uses of this custom font.
+    if (m_fontDataTable.isEmpty())
+        return;
+    HashMap<unsigned, SegmentedFontData*>::iterator end = m_fontDataTable.end();
+    for (HashMap<unsigned, SegmentedFontData*>::iterator it = m_fontDataTable.begin(); it != end; ++it)
+        GlyphPageTreeNode::pruneTreeCustomFontData(it->second);
+    deleteAllValues(m_fontDataTable);
+    m_fontDataTable.clear();
+}
+
+bool CSSSegmentedFontFace::isLoaded() const
+{
+    unsigned size = m_ranges.size();
+    for (unsigned i = 0; i < size; i++) {
+        if (!m_ranges[i].fontFace()->isLoaded())
+            return false;
+    }
+    return true;
+}
+
+bool CSSSegmentedFontFace::isValid() const
+{
+    unsigned size = m_ranges.size();
+    for (unsigned i = 0; i < size; i++) {
+        if (!m_ranges[i].fontFace()->isValid())
+            return false;
+    }
+    return true;
+}
+
+void CSSSegmentedFontFace::fontLoaded(CSSFontFace*)
+{
+    pruneTable();
+    m_fontSelector->fontLoaded(this);
+}
+
+void CSSSegmentedFontFace::overlayRange(UChar32 from, UChar32 to, PassRefPtr<CSSFontFace> fontFace)
+{
+    pruneTable();
+    fontFace->setSegmentedFontFace(this);
+
+    unsigned size = m_ranges.size();
+    if (size) {
+        Vector<FontFaceRange, 8> oldRanges = m_ranges;
+        m_ranges.clear();
+        for (unsigned i = 0; i < size; i++) {
+            const FontFaceRange& range = oldRanges[i];
+            if (range.from() > to || range.to() < from)
+                m_ranges.append(range);
+            else if (range.from() < from) {
+                m_ranges.append(FontFaceRange(range.from(), from - 1, range.fontFace()));
+                if (range.to() > to)
+                    m_ranges.append(FontFaceRange(to + 1, range.to(), range.fontFace()));
+            } else if (range.to() > to)
+                m_ranges.append(FontFaceRange(to + 1, range.to(), range.fontFace()));
+        }
+    }
+    m_ranges.append(FontFaceRange(from, to, fontFace));
+}
+
+FontData* CSSSegmentedFontFace::getFontData(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic)
+{
+    if (!isValid())
+        return 0;
+
+    unsigned hashKey = fontDescription.computedPixelSize() << 2 | (syntheticBold ? 0 : 2) | (syntheticItalic ? 0 : 1);
+
+    SegmentedFontData* fontData = m_fontDataTable.get(hashKey);
+    if (fontData)
+        return fontData;
+
+    fontData = new SegmentedFontData();
+
+    unsigned size = m_ranges.size();
+    for (unsigned i = 0; i < size; i++) {
+        if (const FontData* rangeFontData = m_ranges[i].fontFace()->getFontData(fontDescription, syntheticBold, syntheticItalic)) {
+            ASSERT(!rangeFontData->isSegmented());
+            fontData->appendRange(FontDataRange(m_ranges[i].from(), m_ranges[i].to(), static_cast<const SimpleFontData*>(rangeFontData)));
+        }
+    }
+    if (fontData->numRanges())
+        m_fontDataTable.set(hashKey, fontData);
+    else {
+        delete fontData;
+        fontData = 0;
+    }
+
+    return fontData;
+}
+
+}