1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "chrome/common/media_galleries/itunes_xml_utils.h" 6 7 #include <string> 8 9 #include "base/logging.h" 10 #include "third_party/libxml/chromium/libxml_utils.h" 11 12 namespace itunes { 13 14 bool SkipToNextElement(XmlReader* reader) { 15 if (!reader->SkipToElement()) { 16 // SkipToElement returns false if the current node is an end element, 17 // try to advance to the next element and then try again. 18 if (!reader->Read() || !reader->SkipToElement()) 19 return false; 20 } 21 return true; 22 } 23 24 bool SeekToNodeAtCurrentDepth(XmlReader* reader, const std::string& name) { 25 int depth = reader->Depth(); 26 do { 27 if (!SkipToNextElement(reader) || reader->Depth() < depth) 28 return false; 29 DCHECK_EQ(depth, reader->Depth()); 30 if (reader->NodeName() == name) 31 return true; 32 } while (reader->Next()); 33 34 return false; 35 } 36 37 bool SeekInDict(XmlReader* reader, const std::string& key) { 38 DCHECK_EQ("dict", reader->NodeName()); 39 40 int dict_content_depth = reader->Depth() + 1; 41 // Advance past the dict node and into the body of the dictionary. 42 if (!reader->Read()) 43 return false; 44 45 while (reader->Depth() >= dict_content_depth) { 46 if (!SeekToNodeAtCurrentDepth(reader, "key")) 47 return false; 48 std::string found_key; 49 if (!reader->ReadElementContent(&found_key)) 50 return false; 51 DCHECK_EQ(dict_content_depth, reader->Depth()); 52 if (found_key == key) 53 return true; 54 } 55 return false; 56 } 57 58 } // namespace itunes 59
