Revert "Added support for speaking keys through accessibility service."

This reverts commit dcade18113286a132a2f5fb508fdba836470c3fb.

Bug: 4379983
Change-Id: I2448d8f03990a39a3e328a88904d82efc70241a2

1 files changed, 0 insertions, 211 deletions

diff --git a/java/src/com/android/inputmethod/latin/AccessibilityUtils.java b/java/src/com/android/inputmethod/latin/AccessibilityUtils.java
deleted file mode 100644
index cd3f9e0ad..000000000
--- a/java/src/com/android/inputmethod/latin/AccessibilityUtils.java
+++ /dev/null
@@ -1,211 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.inputmethod.latin;
-
-import android.content.Context;
-import android.content.SharedPreferences;
-import android.content.res.TypedArray;
-import android.view.accessibility.AccessibilityEvent;
-import android.view.accessibility.AccessibilityManager;
-
-import com.android.inputmethod.keyboard.Keyboard;
-import com.android.inputmethod.keyboard.KeyboardSwitcher;
-
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * Utility functions for accessibility support.
- */
-public class AccessibilityUtils {
-    /** Shared singleton instance. */
-    private static final AccessibilityUtils sInstance = new AccessibilityUtils();
-    private /* final */ LatinIME mService;
-    private /* final */ AccessibilityManager mAccessibilityManager;
-    private /* final */ Map<Integer, CharSequence> mDescriptions;
-
-    /**
-     * Returns a shared instance of AccessibilityUtils.
-     *
-     * @return A shared instance of AccessibilityUtils.
-     */
-    public static AccessibilityUtils getInstance() {
-        return sInstance;
-    }
-
-    /**
-     * Initializes (or re-initializes) the shared instance of AccessibilityUtils
-     * with the specified parent service and preferences.
-     *
-     * @param service The parent input method service.
-     * @param prefs The parent preferences.
-     */
-    public static void init(LatinIME service, SharedPreferences prefs) {
-        sInstance.initialize(service, prefs);
-    }
-
-    private AccessibilityUtils() {
-        // This class is not publicly instantiable.
-    }
-
-    /**
-     * Initializes (or re-initializes) with the specified parent service and
-     * preferences.
-     *
-     * @param service The parent input method service.
-     * @param prefs The parent preferences.
-     */
-    private void initialize(LatinIME service, SharedPreferences prefs) {
-        mService = service;
-        mAccessibilityManager = (AccessibilityManager) service.getSystemService(
-                Context.ACCESSIBILITY_SERVICE);
-        mDescriptions = null;
-    }
-
-    /**
-     * Returns true if accessibility is enabled.
-     *
-     * @return {@code true} if accessibility is enabled.
-     */
-    public boolean isAccessibilityEnabled() {
-        return mAccessibilityManager.isEnabled();
-    }
-
-    /**
-     * Speaks a key's action after it has been released. Does not speak letter
-     * keys since typed keys are already spoken aloud by TalkBack.
-     * <p>
-     * No-op if accessibility is not enabled.
-     * </p>
-     *
-     * @param primaryCode The primary code of the released key.
-     * @param switcher The input method's {@link KeyboardSwitcher}.
-     */
-    public void onRelease(int primaryCode, KeyboardSwitcher switcher) {
-        if (!isAccessibilityEnabled()) {
-            return;
-        }
-
-        int resId = -1;
-
-        switch (primaryCode) {
-            case Keyboard.CODE_SHIFT: {
-                if (switcher.isShiftedOrShiftLocked()) {
-                    resId = R.string.description_shift_on;
-                } else {
-                    resId = R.string.description_shift_off;
-                }
-                break;
-            }
-
-            case Keyboard.CODE_SWITCH_ALPHA_SYMBOL: {
-                if (switcher.isAlphabetMode()) {
-                    resId = R.string.description_symbols_off;
-                } else {
-                    resId = R.string.description_symbols_on;
-                }
-                break;
-            }
-        }
-
-        if (resId >= 0) {
-            speakDescription(mService.getResources().getText(resId));
-        }
-    }
-
-    /**
-     * Speaks a key's description for accessibility. If a key has an explicit
-     * description defined in keycodes.xml, that will be used. Otherwise, if the
-     * key is a Unicode character, then its character will be used.
-     * <p>
-     * No-op if accessibility is not enabled.
-     * </p>
-     *
-     * @param primaryCode The primary code of the pressed key.
-     * @param switcher The input method's {@link KeyboardSwitcher}.
-     */
-    public void onPress(int primaryCode, KeyboardSwitcher switcher) {
-        if (!isAccessibilityEnabled()) {
-            return;
-        }
-
-        // TODO Use the current keyboard state to read "Switch to symbols"
-        // instead of just "Symbols" (and similar for shift key).
-        CharSequence description = describeKey(primaryCode);
-        if (description == null && Character.isDefined((char) primaryCode)) {
-            description = Character.toString((char) primaryCode);
-        }
-
-        if (description != null) {
-            speakDescription(description);
-        }
-    }
-
-    /**
-     * Returns a text description for a given key code. If the key does not have
-     * an explicit description, returns <code>null</code>.
-     *
-     * @param keyCode An integer key code.
-     * @return A {@link CharSequence} describing the key or <code>null</code> if
-     *         no description is available.
-     */
-    private CharSequence describeKey(int keyCode) {
-        // If not loaded yet, load key descriptions from XML file.
-        if (mDescriptions == null) {
-            mDescriptions = loadDescriptions();
-        }
-
-        return mDescriptions.get(keyCode);
-    }
-
-    /**
-     * Loads key descriptions from resources.
-     */
-    private Map<Integer, CharSequence> loadDescriptions() {
-        final Map<Integer, CharSequence> descriptions = new HashMap<Integer, CharSequence>();
-        final TypedArray array = mService.getResources().obtainTypedArray(R.array.key_descriptions);
-
-        // Key descriptions are stored as a key code followed by a string.
-        for (int i = 0; i < array.length() - 1; i += 2) {
-            int code = array.getInteger(i, 0);
-            CharSequence desc = array.getText(i + 1);
-
-            descriptions.put(code, desc);
-        }
-
-        array.recycle();
-
-        return descriptions;
-    }
-
-    /**
-     * Sends a character sequence to be read aloud.
-     *
-     * @param description The {@link CharSequence} to be read aloud.
-     */
-    private void speakDescription(CharSequence description) {
-        // TODO We need to add an AccessibilityEvent type for IMEs.
-        final AccessibilityEvent event = AccessibilityEvent.obtain(
-                AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
-        event.setPackageName(mService.getPackageName());
-        event.setClassName(getClass().getName());
-        event.setAddedCount(description.length());
-        event.getText().add(description);
-
-        mAccessibilityManager.sendAccessibilityEvent(event);
-    }
-}