blob: a4ef7ebdcda9846491091c49ac4ec99e519158c3 [file] [log] [blame]
// Copyright 2013 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.
#include "ash/ash_export.h"
#include "ash/magnifier/magnifier_constants.h"
#include "base/time/time.h"
namespace ash {
enum AccessibilityNotificationVisibility {
enum AccessibilityAlert {
// A deletate class to control accessibility features.
class ASH_EXPORT AccessibilityDelegate {
virtual ~AccessibilityDelegate() {}
// Invoked to toggle spoken feedback for accessibility
virtual void ToggleSpokenFeedback(
AccessibilityNotificationVisibility notify) = 0;
// Returns true if spoken feedback is enabled.
virtual bool IsSpokenFeedbackEnabled() const = 0;
// Invoked to toggle high contrast mode for accessibility.
virtual void ToggleHighContrast() = 0;
// Returns true if high contrast mode is enabled.
virtual bool IsHighContrastEnabled() const = 0;
// Invoked to enable the screen magnifier.
virtual void SetMagnifierEnabled(bool enabled) = 0;
// Invoked to change the type of the screen magnifier.
virtual void SetMagnifierType(MagnifierType type) = 0;
// Returns true if the screen magnifier is enabled or not.
virtual bool IsMagnifierEnabled() const = 0;
// Returns the current screen magnifier mode.
virtual MagnifierType GetMagnifierType() const = 0;
// Invoked to enable Large Cursor.
virtual void SetLargeCursorEnabled(bool enabled) = 0;
// Returns ture if Large Cursor is enabled or not.
virtual bool IsLargeCursorEnabled() const = 0;
// Invoked to enable autoclick.
virtual void SetAutoclickEnabled(bool enabled) = 0;
// Returns if autoclick is enabled or not.
virtual bool IsAutoclickEnabled() const = 0;
// Returns true when the accessibility menu should be shown.
virtual bool ShouldShowAccessibilityMenu() const = 0;
// Cancel all current and queued speech immediately.
virtual void SilenceSpokenFeedback() const = 0;
// Saves the zoom scale of the full screen magnifier.
virtual void SaveScreenMagnifierScale(double scale) = 0;
// Gets a saved value of the zoom scale of full screen magnifier. If a value
// is not saved, return a negative value.
virtual double GetSavedScreenMagnifierScale() = 0;
// Triggers an accessibility alert to give the user feedback.
virtual void TriggerAccessibilityAlert(AccessibilityAlert alert) = 0;
// Gets the last accessibility alert that was triggered.
virtual AccessibilityAlert GetLastAccessibilityAlert() = 0;
// Initiates play of shutdown sound and returns it's duration.
virtual base::TimeDelta PlayShutdownSound() const = 0;
} // namespace ash