chrome/browser/prefs/browser_ui_prefs_migrator.cc

   1 // Copyright (c) 2014 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/prefs/browser_ui_prefs_migrator.h"
   6
   7 #include <set>
   8
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/strings/string_util.h"
  11 #include "base/values.h"
  12 #include "chrome/common/pref_names.h"
  13
  14 BrowserUIPrefsMigrator::BrowserUIPrefsMigrator(WriteablePrefStore* pref_store)
  15     : pref_store_(pref_store) {
  16 }
  17
  18 BrowserUIPrefsMigrator::~BrowserUIPrefsMigrator() {
  19 }
  20
  21 void BrowserUIPrefsMigrator::OnInitializationCompleted(
  22     bool succeeded) {
  23   pref_store_->RemoveObserver(this);
  24   scoped_ptr<BrowserUIPrefsMigrator> self_deleter(this);
  25   if (!succeeded)
  26     return;
  27
  28   base::Value* browser_value = NULL;
  29   if (!pref_store_->GetMutableValue("browser", &browser_value))
  30     return;
  31
  32   base::DictionaryValue* browser_dict = NULL;
  33   if (!browser_value->GetAsDictionary(&browser_dict))
  34     return;
  35
  36   // Don't bother scanning "browser" if the migration already occurred.
  37   if (browser_dict->HasKey("app_window_placement"))
  38     return;
  39
  40   // Get a set of keys in the dictionary. This must be done separately from the
  41   // migration because the migration modifies the dictionary being iterated.
  42   std::set<std::string> keys_to_check;
  43   for (base::DictionaryValue::Iterator it(*browser_dict); !it.IsAtEnd();
  44        it.Advance()) {
  45     keys_to_check.insert(it.key());
  46   }
  47
  48   scoped_ptr<base::DictionaryValue> app_window_placement;
  49   // Apps used to have their window placement preferences registered as
  50   // "browser.window_placement_$APPNAME".
  51   const std::string search_for =
  52       std::string(prefs::kBrowserWindowPlacement) + "_";
  53   for (std::set<std::string>::const_iterator it = keys_to_check.begin();
  54        it != keys_to_check.end();
  55        ++it) {
  56     std::string full_key("browser." + *it);
  57     if (StartsWithASCII(full_key, search_for, true /* case_sensitive */)) {
  58       if (full_key == prefs::kBrowserWindowPlacementPopup)
  59         continue;
  60       scoped_ptr<base::Value> single_app_placement_dict;
  61       bool found = browser_dict->Remove(*it, &single_app_placement_dict);
  62       DCHECK(found);
  63       std::string new_key(full_key.substr(search_for.length()));
  64       if (!app_window_placement)
  65         app_window_placement.reset(new base::DictionaryValue);
  66       app_window_placement->Set(new_key, single_app_placement_dict.release());
  67     }
  68   }
  69   if (app_window_placement) {
  70     pref_store_->SetValue(prefs::kAppWindowPlacement,
  71                           app_window_placement.release());
  72   }
  73 }