Integrate SymbolsIterator into RunSegmenter

third_party/WebKit/Source/platform/fonts/shaping/RunSegmenter.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef RunSegmenter_h
 #define RunSegmenter_h
 
 #include "platform/fonts/FontOrientation.h"
 #include "platform/fonts/FontTraits.h"
 #include "platform/fonts/OrientationIterator.h"
 #include "platform/fonts/ScriptRunIterator.h"
 #include "platform/fonts/SmallCapsIterator.h"
+#include "platform/fonts/SymbolsIterator.h"
 #include "platform/fonts/UTF16TextIterator.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
 
 #include <unicode/uscript.h>
 
 namespace blink {
 
 // A tool for segmenting runs prior to shaping, combining ScriptIterator,
 // OrientationIterator and SmallCapsIterator, depending on orientaton and
 // font-variant of the text run.
 class PLATFORM_EXPORT RunSegmenter {
     STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(RunSegmenter);
 public:
 
     // Indices into the UTF-16 buffer that is passed in
     struct RunSegmenterRange {
         DISALLOW_NEW();
         unsigned start;
         unsigned end;
         UScriptCode script;
         OrientationIterator::RenderOrientation renderOrientation;
         SmallCapsIterator::SmallCapsBehavior smallCapsBehavior;
+        FontFallbackPriority fontFallbackPriority;
     };
 
     RunSegmenter(const UChar* buffer, unsigned bufferSize, FontOrientation, FontVariant);
 
     bool consume(RunSegmenterRange*);
 
 private:
 
     void consumeOrientationIteratorPastLastSplit();
     void consumeSmallCapsIteratorPastLastSplit();
     void consumeScriptIteratorPastLastSplit();
+    void consumeSymbolsIteratorPastLastSplit();
 
     unsigned m_bufferSize;
     RunSegmenterRange m_candidateRange;
     OwnPtr<ScriptRunIterator> m_scriptRunIterator;
     OwnPtr<OrientationIterator> m_orientationIterator;
     OwnPtr<SmallCapsIterator> m_smallCapsIterator;
+    OwnPtr<SymbolsIterator> m_symbolsIterator;
     unsigned m_lastSplit;
     unsigned m_scriptRunIteratorPosition;
     unsigned m_orientationIteratorPosition;
     unsigned m_smallCapsIteratorPosition;
+    unsigned m_symbolsIteratorPosition;
     bool m_atEnd;
 };
 
 } // namespace blink
 
 #endif