[WIP] Streaming CSS parser

third_party/WebKit/Source/core/css/parser/CSSParserObserverWrapper.cpp

-// 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.
-
-#include "core/css/parser/CSSParserObserverWrapper.h"
-
-#include "core/css/parser/CSSParserTokenRange.h"
-
-namespace blink {
-
-unsigned CSSParserObserverWrapper::startOffset(
-    const CSSParserTokenRange& range) {
-  return m_tokenOffsets[range.begin() - m_firstParserToken];
-}
-
-unsigned CSSParserObserverWrapper::previousTokenStartOffset(
-    const CSSParserTokenRange& range) {
-  if (range.begin() == m_firstParserToken)
-    return 0;
-  return m_tokenOffsets[range.begin() - m_firstParserToken - 1];
-}
-
-unsigned CSSParserObserverWrapper::endOffset(const CSSParserTokenRange& range) {
-  return m_tokenOffsets[range.end() - m_firstParserToken];
-}
-
-void CSSParserObserverWrapper::skipCommentsBefore(
-    const CSSParserTokenRange& range,
-    bool leaveDirectlyBefore) {
-  unsigned startIndex = range.begin() - m_firstParserToken;
-  if (!leaveDirectlyBefore)
-    startIndex++;
-  while (m_commentIterator < m_commentOffsets.end() &&
-         m_commentIterator->tokensBefore < startIndex)
-    m_commentIterator++;
-}
-
-void CSSParserObserverWrapper::yieldCommentsBefore(
-    const CSSParserTokenRange& range) {
-  unsigned startIndex = range.begin() - m_firstParserToken;
-  while (m_commentIterator < m_commentOffsets.end() &&
-         m_commentIterator->tokensBefore <= startIndex) {
-    m_observer.observeComment(m_commentIterator->startOffset,
-                              m_commentIterator->endOffset);
-    m_commentIterator++;
-  }
-}
-
-}  // namespace blink