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
14BrowserUIPrefsMigrator::BrowserUIPrefsMigrator(WriteablePrefStore* pref_store)
15    : pref_store_(pref_store) {
16}
17
18BrowserUIPrefsMigrator::~BrowserUIPrefsMigrator() {
19}
20
21void 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}
74