chrome/browser/media_galleries/fileapi/safe_itunes_pref_parser_win.cc

   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/browser/media_galleries/fileapi/safe_itunes_pref_parser_win.h"
   6
   7 #include "chrome/common/chrome_utility_messages.h"
   8 #include "content/public/browser/browser_thread.h"
   9 #include "content/public/browser/utility_process_host.h"
  10
  11 using content::BrowserThread;
  12 using content::UtilityProcessHost;
  13
  14 namespace itunes {
  15
  16 SafeITunesPrefParserWin::SafeITunesPrefParserWin(
  17     const std::string& unsafe_xml,
  18     const ParserCallback& callback)
  19     : unsafe_xml_(unsafe_xml),
  20       callback_(callback),
  21       parser_state_(INITIAL_STATE) {
  22   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
  23   DCHECK(!callback_.is_null());
  24 }
  25
  26 void SafeITunesPrefParserWin::Start() {
  27   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
  28   BrowserThread::PostTask(
  29       BrowserThread::IO,
  30       FROM_HERE,
  31       base::Bind(&SafeITunesPrefParserWin::StartWorkOnIOThread, this));
  32 }
  33
  34 SafeITunesPrefParserWin::~SafeITunesPrefParserWin() {
  35 }
  36
  37 void SafeITunesPrefParserWin::StartWorkOnIOThread() {
  38   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  39   DCHECK_EQ(INITIAL_STATE, parser_state_);
  40
  41   UtilityProcessHost* host =
  42       UtilityProcessHost::Create(this, base::MessageLoopProxy::current());
  43   host->Send(new ChromeUtilityMsg_ParseITunesPrefXml(unsafe_xml_));
  44   parser_state_ = STARTED_PARSING_STATE;
  45 }
  46
  47 void SafeITunesPrefParserWin::OnGotITunesDirectory(
  48     const base::FilePath& library_file) {
  49   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  50
  51   if (parser_state_ != STARTED_PARSING_STATE)
  52     return;
  53   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
  54                           base::Bind(callback_, library_file));
  55   parser_state_ = FINISHED_PARSING_STATE;
  56 }
  57
  58 void SafeITunesPrefParserWin::OnProcessCrashed(int exit_code) {
  59   OnGotITunesDirectory(base::FilePath());
  60 }
  61
  62 bool SafeITunesPrefParserWin::OnMessageReceived(
  63     const IPC::Message& message) {
  64   bool handled = true;
  65   IPC_BEGIN_MESSAGE_MAP(SafeITunesPrefParserWin, message)
  66     IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_GotITunesDirectory,
  67                         OnGotITunesDirectory)
  68     IPC_MESSAGE_UNHANDLED(handled = false)
  69   IPC_END_MESSAGE_MAP()
  70   return handled;
  71 }
  72
  73 }  // namespace itunes