Implement VTTCue.region and sync the VTTRegion interface

third_party/WebKit/Source/core/html/track/vtt/VTTParser.cpp

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 93 matching lines @@
   m_lineReader.append(textData);
   parse();
 }
 
 void VTTParser::flush() {
   String textData = m_decoder->flush();
   m_lineReader.append(textData);
   m_lineReader.setEndOfStream();
   parse();
   flushPendingCue();
+  m_regionMap.clear();
 }
 
 void VTTParser::parse() {
   // WebVTT parser algorithm. (5.1 WebVTT file parsing.)
   // Steps 1 - 3 - Initial setup.
 
   String line;
   while (m_lineReader.getLine(line)) {
     switch (m_state) {
       case Initial:
@@ skipping 245 matching lines @@
     Document& document,
     const String& cueText) {
   VTTTreeBuilder treeBuilder(document);
   return treeBuilder.buildFromString(cueText);
 }
 
 void VTTParser::createNewCue() {
   VTTCue* cue = VTTCue::create(*m_document, m_currentStartTime,
                                m_currentEndTime, m_currentContent.toString());
   cue->setId(m_currentId);
-  cue->parseSettings(m_currentSettings);
+  cue->parseSettings(&m_regionMap, m_currentSettings);
 
   m_cueList.push_back(cue);
   if (m_client)
     m_client->newCuesParsed();
 }
 
 void VTTParser::resetCueValues() {
   m_currentId = emptyAtom;
   m_currentSettings = emptyString;
   m_currentStartTime = 0;
@@ skipping 13 matching lines @@
   // with the same region identifier value as region, remove that region.
   for (size_t i = 0; i < m_regionList.size(); ++i) {
     if (m_regionList[i]->id() == region->id()) {
       m_regionList.remove(i);
       break;
     }
   }
 
   // Step 12.5.11
   m_regionList.push_back(region);
+
+  if (region->id().isEmpty())
+    return;
+  m_regionMap.set(region->id(), region);
 }
 
 bool VTTParser::collectTimeStamp(const String& line, double& timeStamp) {
   VTTScanner input(line);
   return collectTimeStamp(input, timeStamp);
 }
 
 bool VTTParser::collectTimeStamp(VTTScanner& input, double& timeStamp) {
   // Collect a WebVTT timestamp (5.3 WebVTT cue timings and settings parsing.)
   // Steps 1 - 4 - Initial checks, let most significant units be minutes.
@@ skipping 147 matching lines @@
     }
     default:
       break;
   }
 }
 
 DEFINE_TRACE(VTTParser) {
   visitor->trace(m_document);
   visitor->trace(m_client);
   visitor->trace(m_cueList);
+  visitor->trace(m_regionMap);
   visitor->trace(m_regionList);
 }
 
 }  // namespace blink