| // Copyright 2013 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 "chrome/common/media_galleries/itunes_xml_utils.h" |
| |
| #include <string> |
| |
| #include "base/logging.h" |
| #include "third_party/libxml/chromium/libxml_utils.h" |
| |
| namespace itunes { |
| |
| bool SkipToNextElement(XmlReader* reader) { |
| if (!reader->SkipToElement()) { |
| // SkipToElement returns false if the current node is an end element, |
| // try to advance to the next element and then try again. |
| if (!reader->Read() || !reader->SkipToElement()) |
| return false; |
| } |
| return true; |
| } |
| |
| bool SeekToNodeAtCurrentDepth(XmlReader* reader, const std::string& name) { |
| int depth = reader->Depth(); |
| do { |
| if (!SkipToNextElement(reader) || reader->Depth() < depth) |
| return false; |
| DCHECK_EQ(depth, reader->Depth()); |
| if (reader->NodeName() == name) |
| return true; |
| } while (reader->Next()); |
| |
| return false; |
| } |
| |
| bool SeekInDict(XmlReader* reader, const std::string& key) { |
| DCHECK_EQ("dict", reader->NodeName()); |
| |
| int dict_content_depth = reader->Depth() + 1; |
| // Advance past the dict node and into the body of the dictionary. |
| if (!reader->Read()) |
| return false; |
| |
| while (reader->Depth() >= dict_content_depth) { |
| if (!SeekToNodeAtCurrentDepth(reader, "key")) |
| return false; |
| std::string found_key; |
| if (!reader->ReadElementContent(&found_key)) |
| return false; |
| DCHECK_EQ(dict_content_depth, reader->Depth()); |
| if (found_key == key) |
| return true; |
| } |
| return false; |
| } |
| |
| } // namespace itunes |