| // Copyright 2010-2014, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| package org.mozc.android.inputmethod.japanese.accessibility; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.Optional; |
| import com.google.common.base.Preconditions; |
| |
| import android.content.Context; |
| import android.os.Build; |
| import android.provider.Settings; |
| import android.view.accessibility.AccessibilityEvent; |
| |
| import java.lang.reflect.Field; |
| |
| /** |
| * Utility class for accessibility. |
| */ |
| public class AccessibilityUtil { |
| |
| private AccessibilityUtil() {} |
| |
| private static Optional<AccessibilityManagerWrapper> accessibilityManager = |
| Optional.<AccessibilityManagerWrapper>absent(); |
| private static Optional<AudioManagerWrapper> audioManager = |
| Optional.<AudioManagerWrapper>absent(); |
| private static Optional<Boolean> isAccessibilitySpeakPasswordEnabled = |
| Optional.<Boolean>absent(); |
| private static Optional<Boolean> isAccessibilityEnabled = |
| Optional.<Boolean>absent(); |
| |
| /** |
| * Resets internal status. |
| * |
| * <p>Should be used only from testcases. |
| */ |
| @VisibleForTesting |
| static void reset() { |
| setAccessibilityManagerForTesting(Optional.<AccessibilityManagerWrapper>absent()); |
| setAudioManagerForTesting(Optional.<AudioManagerWrapper>absent()); |
| setAccessibilitySpeakPasswordEnabled(Optional.<Boolean>absent()); |
| setAccessibilityEnabled(Optional.<Boolean>absent()); |
| } |
| |
| /** |
| * Sets manager instance for testing. |
| * |
| * If absent, real service is used. |
| */ |
| @VisibleForTesting |
| static void setAccessibilityManagerForTesting(Optional<AccessibilityManagerWrapper> manager) { |
| accessibilityManager = Preconditions.checkNotNull(manager); |
| } |
| |
| /** |
| * Gets manager instance. |
| * |
| * <p>If {@code #setAccessibilityManagerForTesting(Optional)} nor this method have not been |
| * invoked yet, cache instance is created inside. |
| * If not, cached instance (or set one by setAccessibilityManagerForTesting) |
| * is returned. |
| * Therefore this is lightweight method. |
| */ |
| static AccessibilityManagerWrapper getAccessibilityManager(Context context) { |
| if (!accessibilityManager.isPresent()) { |
| accessibilityManager = |
| Optional.of(new AccessibilityManagerWrapper(Preconditions.checkNotNull(context))); |
| } |
| return accessibilityManager.get(); |
| } |
| |
| /** |
| * @see #setAccessibilityManagerForTesting(Optional) |
| */ |
| @VisibleForTesting |
| static void setAudioManagerForTesting(Optional<AudioManagerWrapper> manager) { |
| audioManager = Preconditions.checkNotNull(manager); |
| } |
| |
| /** |
| * @see #getAccessibilityManager(Context) |
| */ |
| static AudioManagerWrapper getAudioManager(Context context) { |
| if (!audioManager.isPresent()) { |
| audioManager = |
| Optional.of(new AudioManagerWrapper(Preconditions.checkNotNull(context))); |
| } |
| return audioManager.get(); |
| } |
| |
| static void setAccessibilityEnabled(Optional<Boolean> enabled) { |
| isAccessibilityEnabled = Preconditions.checkNotNull(enabled); |
| } |
| |
| static boolean isAccessibilityEnabled(Context context) { |
| return isAccessibilityEnabled.isPresent() |
| ? isAccessibilityEnabled.get() |
| : getAccessibilityManager(context).isEnabled(); |
| } |
| |
| /** |
| * @return true if touch exploration is enabled |
| */ |
| public static boolean isTouchExplorationEnabled(Context context) { |
| return getAccessibilityManager(context).isTouchExplorationEnabled(); |
| } |
| /** |
| * Sends {@code AccessibilityEvent} to {@code AccessibilityManager}. |
| * Accessibility must be enabled. |
| */ |
| static void sendAccessibilityEvent(Context context, AccessibilityEvent event) { |
| AccessibilityManagerWrapper manager = getAccessibilityManager(context); |
| Preconditions.checkState(manager.isEnabled()); |
| manager.sendAccessibilityEvent(event); |
| } |
| |
| @VisibleForTesting |
| static void setAccessibilitySpeakPasswordEnabled(Optional<Boolean> enabled) { |
| isAccessibilitySpeakPasswordEnabled = Preconditions.checkNotNull(enabled); |
| } |
| |
| /** |
| * Gets Settings.Secure.ACCESSIBILITY_SPEAK_PASSWORD using reflection. |
| * The field is since API Level 15. |
| */ |
| static boolean isAccessibilitySpeakPasswordEnabled() { |
| if (isAccessibilitySpeakPasswordEnabled.isPresent()) { |
| return isAccessibilitySpeakPasswordEnabled.get(); |
| } |
| if (Build.VERSION.SDK_INT < 15) { |
| return false; |
| } |
| try { |
| Field field = Settings.Secure.class.getField("ACCESSIBILITY_SPEAK_PASSWORD"); |
| return String.class.cast(field.get(null)).equals("1"); |
| } catch (NoSuchFieldException e) { |
| // Do nothing. |
| } catch (IllegalArgumentException e) { |
| // Do nothing. |
| } catch (IllegalAccessException e) { |
| // Do nothing. |
| } |
| return false; |
| } |
| } |