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#ifndef CHROME_BROWSER_UI_WEBUI_CHROMEOS_SALSA_UI_H_
6#define CHROME_BROWSER_UI_WEBUI_CHROMEOS_SALSA_UI_H_
7
8#include <map>
9
10#include "base/values.h"
11#include "chrome/browser/profiles/profile.h"
12#include "content/public/browser/web_ui_controller.h"
13
14namespace base {
15class ListValue;
16class Value;
17}  // namespace base
18
19// The WebUI for 'chrome://salsa' -- a user front end for the touch UI
20// blind user studies.  I does this by setting gesture preference values
21// without the user knowing which ones and having them try out various
22// settings to see which results in a better experience for them.
23class SalsaUI : public content::WebUIController {
24 public:
25  // Constructs a new GestureConfig for the specified |web_ui|.
26  explicit SalsaUI(content::WebUI* web_ui);
27  virtual ~SalsaUI();
28
29 private:
30  // Set a preference setting's value.
31  // Two parameters are provided in a JS list: prefName and value, the
32  // key of the preference value to be set, and the value it's to be set to.
33  void SetPreferenceValue(const base::ListValue* args);
34
35  // Record the current value for a preference key and store the key/value pair
36  // in the member variable orig_values_.
37  void BackupPreferenceValue(const base::ListValue* args);
38
39  // Check and see if a key is on the whitelist.  Returns the index into
40  // the whitelist on success and -1 on failure.
41  int WhitelistIndex(const char* key) const;
42
43  std::map<int, const base::Value*> orig_values_;
44
45  DISALLOW_COPY_AND_ASSIGN(SalsaUI);
46};
47
48#endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_SALSA_UI_H_
49
50