Switch to HarfBuzz on Mac and remove CoreText shaper

Source/platform/fonts/mac/ComplexTextController.h

Index: Source/platform/fonts/mac/ComplexTextController.h
diff --git a/Source/platform/fonts/mac/ComplexTextController.h b/Source/platform/fonts/mac/ComplexTextController.h
deleted file mode 100644
index 66b42d866828ef4c4bdc18bfa017ef3e04805acc..0000000000000000000000000000000000000000
--- a/Source/platform/fonts/mac/ComplexTextController.h
+++ /dev/null
@@ -1,180 +0,0 @@
-/*
- * Copyright (C) 2007, 2008, 2009, 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 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.
- */
-
-#ifndef ComplexTextController_h
-#define ComplexTextController_h
-
-#include "wtf/HashSet.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RetainPtr.h"
-#include "wtf/text/WTFString.h"
-#include "wtf/unicode/Unicode.h"
-#include "wtf/Vector.h"
-#include <ApplicationServices/ApplicationServices.h>
-
-typedef unsigned short CGGlyph;
-
-typedef const struct __CTRun * CTRunRef;
-typedef const struct __CTLine * CTLineRef;
-
-namespace blink {
-
-class Font;
-class GlyphBuffer;
-class SimpleFontData;
-class TextRun;
-
-enum GlyphIterationStyle { IncludePartialGlyphs, ByWholeGlyphs };
-
-// ComplexTextController is responsible for rendering and measuring glyphs for
-// complex scripts on OS X.
-class ComplexTextController {
-public:
-    ComplexTextController(const Font*, const TextRun&, bool mayUseNaturalWritingDirection = false, HashSet<const SimpleFontData*>* fallbackFonts = 0, bool forTextEmphasis = false);
-
-    // Advance and emit glyphs up to the specified character.
-    void advance(unsigned to, GlyphBuffer* = 0, GlyphIterationStyle = IncludePartialGlyphs, HashSet<const SimpleFontData*>* fallbackFonts = 0);
-
-    // Compute the character offset for a given x coordinate.
-    int offsetForPosition(float x, bool includePartialGlyphs);
-
-    // Returns the width of everything we've consumed so far.
-    float runWidthSoFar() const { return m_runWidthSoFar; }
-
-    float totalWidth() const { return m_totalWidth; }
-
-    float minGlyphBoundingBoxX() const { return m_minGlyphBoundingBoxX; }
-    float maxGlyphBoundingBoxX() const { return m_maxGlyphBoundingBoxX; }
-    float minGlyphBoundingBoxY() const { return m_minGlyphBoundingBoxY; }
-    float maxGlyphBoundingBoxY() const { return m_maxGlyphBoundingBoxY; }
-
-private:
-    class ComplexTextRun : public RefCounted<ComplexTextRun> {
-    public:
-        static PassRefPtr<ComplexTextRun> create(CTRunRef ctRun, const SimpleFontData* fontData, const UChar* characters, unsigned stringLocation, size_t stringLength, CFRange runRange)
-        {
-            return adoptRef(new ComplexTextRun(ctRun, fontData, characters, stringLocation, stringLength, runRange));
-        }
-
-        static PassRefPtr<ComplexTextRun> create(const SimpleFontData* fontData, const UChar* characters, unsigned stringLocation, size_t stringLength, bool ltr)
-        {
-            return adoptRef(new ComplexTextRun(fontData, characters, stringLocation, stringLength, ltr));
-        }
-
-        unsigned glyphCount() const { return m_glyphCount; }
-        const SimpleFontData* fontData() const { return m_fontData; }
-        const UChar* characters() const { return m_characters; }
-        unsigned stringLocation() const { return m_stringLocation; }
-        size_t stringLength() const { return m_stringLength; }
-        ALWAYS_INLINE CFIndex indexAt(size_t i) const;
-        CFIndex indexBegin() const { return m_indexBegin; }
-        CFIndex indexEnd() const { return m_indexEnd; }
-        CFIndex endOffsetAt(size_t i) const { ASSERT(!m_isMonotonic); return m_glyphEndOffsets[i]; }
-        const CGGlyph* glyphs() const { return m_glyphs; }
-        const CGSize* advances() const { return m_advances; }
-        bool isLTR() const { return m_isLTR; }
-        bool isMonotonic() const { return m_isMonotonic; }
-        void setIsNonMonotonic();
-
-    private:
-        ComplexTextRun(CTRunRef, const SimpleFontData*, const UChar* characters, unsigned stringLocation, size_t stringLength, CFRange runRange);
-        ComplexTextRun(const SimpleFontData*, const UChar* characters, unsigned stringLocation, size_t stringLength, bool ltr);
-
-        unsigned m_glyphCount;
-        const SimpleFontData* m_fontData;
-        const UChar* m_characters;
-        unsigned m_stringLocation;
-        size_t m_stringLength;
-        Vector<CFIndex, 64> m_coreTextIndicesVector;
-        const CFIndex* m_coreTextIndices;
-        CFIndex m_indexBegin;
-        CFIndex m_indexEnd;
-        Vector<CFIndex, 64> m_glyphEndOffsets;
-        Vector<CGGlyph, 64> m_glyphsVector;
-        const CGGlyph* m_glyphs;
-        Vector<CGSize, 64> m_advancesVector;
-        const CGSize* m_advances;
-        bool m_isLTR;
-        bool m_isMonotonic;
-    };
-
-    static unsigned stringBegin(const ComplexTextRun& run) { return run.stringLocation() + run.indexBegin(); }
-    static unsigned stringEnd(const ComplexTextRun& run) { return run.stringLocation() + run.indexEnd(); }
-
-    void collectComplexTextRuns();
-
-    void collectComplexTextRunsForCharacters(const UChar*, unsigned length, unsigned stringLocation, const SimpleFontData*);
-    void adjustGlyphsAndAdvances();
-
-    unsigned findNextRunIndex(unsigned runIndex) const;
-    unsigned indexOfCurrentRun(unsigned& leftmostGlyph);
-    unsigned incrementCurrentRun(unsigned& leftmostGlyph);
-
-    // The initial capacity of these vectors was selected as being the smallest power of two greater than
-    // the average (3.5) plus one standard deviation (7.5) of nonzero sizes used on Arabic Wikipedia.
-    Vector<unsigned, 16> m_runIndices;
-    Vector<unsigned, 16> m_glyphCountFromStartToIndex;
-
-    const Font& m_font;
-    const TextRun& m_run;
-    bool m_isLTROnly;
-    bool m_mayUseNaturalWritingDirection;
-    bool m_forTextEmphasis;
-
-    Vector<String> m_stringsFor8BitRuns;
-    Vector<UChar, 256> m_smallCapsBuffer;
-
-    // Retain lines rather than their runs for better performance.
-    Vector<RetainPtr<CTLineRef> > m_coreTextLines;
-    Vector<RefPtr<ComplexTextRun>, 16> m_complexTextRuns;
-    Vector<CGSize, 256> m_adjustedAdvances;
-    Vector<CGGlyph, 256> m_adjustedGlyphs;
-
-    unsigned m_currentCharacter;
-    int m_end;
-
-    CGFloat m_totalWidth;
-
-    float m_runWidthSoFar;
-    unsigned m_numGlyphsSoFar;
-    size_t m_currentRun;
-    unsigned m_glyphInCurrentRun;
-    unsigned m_characterInCurrentGlyph;
-    float m_expansion;
-    float m_expansionPerOpportunity;
-    float m_leadingExpansion;
-    bool m_afterExpansion;
-
-    HashSet<const SimpleFontData*>* m_fallbackFonts;
-
-    float m_minGlyphBoundingBoxX;
-    float m_maxGlyphBoundingBoxX;
-    float m_minGlyphBoundingBoxY;
-    float m_maxGlyphBoundingBoxY;
-};
-
-} // namespace blink
-
-#endif // ComplexTextController_h