Initial patch.

[vuplus_webkit] / Source / WebCore / platform / graphics / mac / SimpleFontDataMac.mm

diff --git a/Source/WebCore/platform/graphics/mac/SimpleFontDataMac.mm b/Source/WebCore/platform/graphics/mac/SimpleFontDataMac.mm
index 43f7f69..e71eccd 100644 (file)
--- a/Source/WebCore/platform/graphics/mac/SimpleFontDataMac.mm
+++ b/Source/WebCore/platform/graphics/mac/SimpleFontDataMac.mm
@@ -1,30 +1,27 @@
 /*
- * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.
+ * Copyright (C) 2005, 2006, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov
  *
  * 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.
  *
- * 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. 
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- *     its contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission. 
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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.
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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.
  */
 
 #import "config.h"
@@ -416,4 +413,54 @@ float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
     return advance.width + m_syntheticBoldOffset;
 }
 
+struct ProviderInfo {
+    const UChar* characters;
+    size_t length;
+    CFDictionaryRef attributes;
+};
+
+static const UniChar* provideStringAndAttributes(CFIndex stringIndex, CFIndex* count, CFDictionaryRef* attributes, void* context)
+{
+    ProviderInfo* info = static_cast<struct ProviderInfo*>(context);
+    if (stringIndex < 0 || static_cast<size_t>(stringIndex) >= info->length)
+        return 0;
+
+    *count = info->length - stringIndex;
+    *attributes = info->attributes;
+    return info->characters + stringIndex;
+}
+
+bool SimpleFontData::canRenderCombiningCharacterSequence(const UChar* characters, size_t length) const
+{
+    ASSERT(isMainThread());
+
+    if (!m_combiningCharacterSequenceSupport)
+        m_combiningCharacterSequenceSupport = adoptPtr(new HashMap<String, bool>);
+
+    pair<WTF::HashMap<String, bool>::iterator, bool> addResult = m_combiningCharacterSequenceSupport->add(String(characters, length), false);
+    if (!addResult.second)
+        return addResult.first->second;
+
+    RetainPtr<CGFontRef> cgFont(AdoptCF, CTFontCopyGraphicsFont(platformData().ctFont(), 0));
+
+    ProviderInfo info = { characters, length, getCFStringAttributes(0, platformData().orientation()) };
+    RetainPtr<CTLineRef> line(AdoptCF, wkCreateCTLineWithUniCharProvider(&provideStringAndAttributes, 0, &info));
+
+    CFArrayRef runArray = CTLineGetGlyphRuns(line.get());
+    CFIndex runCount = CFArrayGetCount(runArray);
+
+    for (CFIndex r = 0; r < runCount; r++) {
+        CTRunRef ctRun = static_cast<CTRunRef>(CFArrayGetValueAtIndex(runArray, r));
+        ASSERT(CFGetTypeID(ctRun) == CTRunGetTypeID());
+        CFDictionaryRef runAttributes = CTRunGetAttributes(ctRun);
+        CTFontRef runFont = static_cast<CTFontRef>(CFDictionaryGetValue(runAttributes, kCTFontAttributeName));
+        RetainPtr<CGFontRef> runCGFont(AdoptCF, CTFontCopyGraphicsFont(runFont, 0));
+        if (!CFEqual(runCGFont.get(), cgFont.get()))
+            return false;
+    }
+
+    addResult.first->second = true;
+    return true;
+}
+
 } // namespace WebCore