[WIP] Streaming CSS parser

third_party/WebKit/Source/core/css/parser/CSSParserObserverWrapper.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 CSSParserObserverWrapper_h
-#define CSSParserObserverWrapper_h
-
-#include "core/css/parser/CSSParserObserver.h"
-#include "wtf/Allocator.h"
-
-namespace blink {
-
-class CSSParserToken;
-class CSSParserTokenRange;
-
-class CSSParserObserverWrapper {
-  STACK_ALLOCATED();
-
- public:
-  explicit CSSParserObserverWrapper(CSSParserObserver& observer)
-      : m_observer(observer) {}
-
-  unsigned startOffset(const CSSParserTokenRange&);
-  unsigned previousTokenStartOffset(const CSSParserTokenRange&);
-  unsigned endOffset(const CSSParserTokenRange&);  // Includes trailing comments
-
-  void skipCommentsBefore(const CSSParserTokenRange&, bool leaveDirectlyBefore);
-  void yieldCommentsBefore(const CSSParserTokenRange&);
-
-  CSSParserObserver& observer() { return m_observer; }
-  void addComment(unsigned startOffset,
-                  unsigned endOffset,
-                  unsigned tokensBefore) {
-    CommentPosition position = {startOffset, endOffset, tokensBefore};
-    m_commentOffsets.push_back(position);
-  }
-  void addToken(unsigned startOffset) { m_tokenOffsets.push_back(startOffset); }
-  void finalizeConstruction(CSSParserToken* firstParserToken) {
-    m_firstParserToken = firstParserToken;
-    m_commentIterator = m_commentOffsets.begin();
-  }
-
- private:
-  CSSParserObserver& m_observer;
-  Vector<unsigned> m_tokenOffsets;
-  CSSParserToken* m_firstParserToken;
-
-  struct CommentPosition {
-    DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
-    unsigned startOffset;
-    unsigned endOffset;
-    unsigned tokensBefore;
-  };
-
-  Vector<CommentPosition> m_commentOffsets;
-  Vector<CommentPosition>::iterator m_commentIterator;
-};
-
-}  // namespace blink
-
-#endif  // CSSParserObserverWrapper_h