| // Copyright (c) 2012 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. |
| |
| #ifndef CONTENT_PUBLIC_BROWSER_BROWSER_ACCESSIBILITY_STATE_H_ |
| #define CONTENT_PUBLIC_BROWSER_BROWSER_ACCESSIBILITY_STATE_H_ |
| |
| #include "base/callback_forward.h" |
| |
| #include "content/common/content_export.h" |
| |
| namespace content { |
| |
| // The BrowserAccessibilityState class is used to determine if the browser |
| // should be customized for users with assistive technology, such as screen |
| // readers. |
| class CONTENT_EXPORT BrowserAccessibilityState { |
| public: |
| virtual ~BrowserAccessibilityState() { } |
| |
| // Returns the singleton instance. |
| static BrowserAccessibilityState* GetInstance(); |
| |
| // Enables accessibility for all running tabs. |
| virtual void EnableAccessibility() = 0; |
| |
| // Disables accessibility for all running tabs. |
| virtual void DisableAccessibility() = 0; |
| |
| // Called when screen reader client is detected. |
| virtual void OnScreenReaderDetected() = 0; |
| |
| // Returns true if the browser should be customized for accessibility. |
| virtual bool IsAccessibleBrowser() = 0; |
| |
| // Add a callback method that will be called once, a small while after the |
| // browser starts up, when accessibility state histograms are updated. |
| // Use this to register a method to update additional accessibility |
| // histograms. |
| virtual void AddHistogramCallback(base::Closure callback) = 0; |
| |
| virtual void UpdateHistogramsForTesting() = 0; |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_PUBLIC_BROWSER_BROWSER_ACCESSIBILITY_STATE_H_ |