Refactor accessibility classes to be more generic

Change-Id: Ifad1905f304bccdc39f0d5fbcab8a6353e0b4f76

1 files changed, 0 insertions, 392 deletions

diff --git a/java/src/com/android/inputmethod/accessibility/MainKeyboardAccessibilityDelegate.java b/java/src/com/android/inputmethod/accessibility/MainKeyboardAccessibilityDelegate.java
deleted file mode 100644
index 10929424b..000000000
--- a/java/src/com/android/inputmethod/accessibility/MainKeyboardAccessibilityDelegate.java
+++ /dev/null
@@ -1,392 +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.accessibility;
-
-import android.content.Context;
-import android.os.SystemClock;
-import android.support.v4.view.AccessibilityDelegateCompat;
-import android.support.v4.view.ViewCompat;
-import android.support.v4.view.accessibility.AccessibilityEventCompat;
-import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
-import android.util.SparseIntArray;
-import android.view.MotionEvent;
-import android.view.View;
-import android.view.ViewParent;
-import android.view.accessibility.AccessibilityEvent;
-
-import com.android.inputmethod.keyboard.Key;
-import com.android.inputmethod.keyboard.KeyDetector;
-import com.android.inputmethod.keyboard.Keyboard;
-import com.android.inputmethod.keyboard.KeyboardId;
-import com.android.inputmethod.keyboard.MainKeyboardView;
-import com.android.inputmethod.latin.R;
-import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
-
-public final class MainKeyboardAccessibilityDelegate extends AccessibilityDelegateCompat {
-    /** Map of keyboard modes to resource IDs. */
-    private static final SparseIntArray KEYBOARD_MODE_RES_IDS = new SparseIntArray();
-
-    static {
-        KEYBOARD_MODE_RES_IDS.put(KeyboardId.MODE_DATE, R.string.keyboard_mode_date);
-        KEYBOARD_MODE_RES_IDS.put(KeyboardId.MODE_DATETIME, R.string.keyboard_mode_date_time);
-        KEYBOARD_MODE_RES_IDS.put(KeyboardId.MODE_EMAIL, R.string.keyboard_mode_email);
-        KEYBOARD_MODE_RES_IDS.put(KeyboardId.MODE_IM, R.string.keyboard_mode_im);
-        KEYBOARD_MODE_RES_IDS.put(KeyboardId.MODE_NUMBER, R.string.keyboard_mode_number);
-        KEYBOARD_MODE_RES_IDS.put(KeyboardId.MODE_PHONE, R.string.keyboard_mode_phone);
-        KEYBOARD_MODE_RES_IDS.put(KeyboardId.MODE_TEXT, R.string.keyboard_mode_text);
-        KEYBOARD_MODE_RES_IDS.put(KeyboardId.MODE_TIME, R.string.keyboard_mode_time);
-        KEYBOARD_MODE_RES_IDS.put(KeyboardId.MODE_URL, R.string.keyboard_mode_url);
-    }
-
-    private final MainKeyboardView mView;
-    private Keyboard mKeyboard;
-    private MainKeyboardAccessibilityNodeProvider mAccessibilityNodeProvider;
-
-    private Key mLastHoverKey = null;
-
-    /**
-     * Inset in pixels to look for keys when the user's finger exits the keyboard area.
-     */
-    private int mEdgeSlop;
-
-    /** The most recently set keyboard mode. */
-    private int mLastKeyboardMode = KEYBOARD_IS_HIDDEN;
-    private static final int KEYBOARD_IS_HIDDEN = -1;
-
-    public MainKeyboardAccessibilityDelegate(final MainKeyboardView view) {
-        final Context context = view.getContext();
-        mEdgeSlop = context.getResources().getDimensionPixelSize(
-                R.dimen.config_accessibility_edge_slop);
-        mView = view;
-
-        // Ensure that the view has an accessibility delegate.
-        ViewCompat.setAccessibilityDelegate(view, this);
-    }
-
-    /**
-     * Called when the keyboard layout changes.
-     * <p>
-     * <b>Note:</b> This method will be called even if accessibility is not
-     * enabled.
-     * @param keyboard The keyboard that is being set to the wrapping view.
-     */
-    public void setKeyboard(final Keyboard keyboard) {
-        if (keyboard == null) {
-            return;
-        }
-        if (mAccessibilityNodeProvider != null) {
-            mAccessibilityNodeProvider.setKeyboard(keyboard);
-        }
-        final Keyboard lastKeyboard = mKeyboard;
-        final int lastKeyboardMode = mLastKeyboardMode;
-        mKeyboard = keyboard;
-        mLastKeyboardMode = keyboard.mId.mMode;
-
-        // Since this method is called even when accessibility is off, make sure
-        // to check the state before announcing anything.
-        if (!AccessibilityUtils.getInstance().isAccessibilityEnabled()) {
-            return;
-        }
-        // Announce the language name only when the language is changed.
-        if (lastKeyboard == null || !keyboard.mId.mSubtype.equals(lastKeyboard.mId.mSubtype)) {
-            announceKeyboardLanguage(keyboard);
-            return;
-        }
-        // Announce the mode only when the mode is changed.
-        if (keyboard.mId.mMode != lastKeyboardMode) {
-            announceKeyboardMode(keyboard);
-            return;
-        }
-        // Announce the keyboard type only when the type is changed.
-        if (keyboard.mId.mElementId != lastKeyboard.mId.mElementId) {
-            announceKeyboardType(keyboard, lastKeyboard);
-            return;
-        }
-    }
-
-    /**
-     * Called when the keyboard is hidden and accessibility is enabled.
-     */
-    public void onHideWindow() {
-        announceKeyboardHidden();
-        mLastKeyboardMode = KEYBOARD_IS_HIDDEN;
-    }
-
-    /**
-     * Announces which language of keyboard is being displayed.
-     *
-     * @param keyboard The new keyboard.
-     */
-    private void announceKeyboardLanguage(final Keyboard keyboard) {
-        final String languageText = SubtypeLocaleUtils.getSubtypeDisplayNameInSystemLocale(
-                keyboard.mId.mSubtype);
-        sendWindowStateChanged(languageText);
-    }
-
-    /**
-     * Announces which type of keyboard is being displayed.
-     * If the keyboard type is unknown, no announcement is made.
-     *
-     * @param keyboard The new keyboard.
-     */
-    private void announceKeyboardMode(final Keyboard keyboard) {
-        final Context context = mView.getContext();
-        final int modeTextResId = KEYBOARD_MODE_RES_IDS.get(keyboard.mId.mMode);
-        if (modeTextResId == 0) {
-            return;
-        }
-        final String modeText = context.getString(modeTextResId);
-        final String text = context.getString(R.string.announce_keyboard_mode, modeText);
-        sendWindowStateChanged(text);
-    }
-
-    /**
-     * Announces which type of keyboard is being displayed.
-     *
-     * @param keyboard The new keyboard.
-     * @param lastKeyboard The last keyboard.
-     */
-    private void announceKeyboardType(final Keyboard keyboard, final Keyboard lastKeyboard) {
-        final int lastElementId = lastKeyboard.mId.mElementId;
-        final int resId;
-        switch (keyboard.mId.mElementId) {
-        case KeyboardId.ELEMENT_ALPHABET_AUTOMATIC_SHIFTED:
-        case KeyboardId.ELEMENT_ALPHABET:
-            if (lastElementId == KeyboardId.ELEMENT_ALPHABET
-                    || lastElementId == KeyboardId.ELEMENT_ALPHABET_AUTOMATIC_SHIFTED) {
-                return;
-            }
-            resId = R.string.spoken_description_mode_alpha;
-            break;
-        case KeyboardId.ELEMENT_ALPHABET_MANUAL_SHIFTED:
-            resId = R.string.spoken_description_shiftmode_on;
-            break;
-        case KeyboardId.ELEMENT_ALPHABET_SHIFT_LOCK_SHIFTED:
-        case KeyboardId.ELEMENT_ALPHABET_SHIFT_LOCKED:
-            resId = R.string.spoken_description_shiftmode_locked;
-            break;
-        case KeyboardId.ELEMENT_SYMBOLS:
-            resId = R.string.spoken_description_mode_symbol;
-            break;
-        case KeyboardId.ELEMENT_SYMBOLS_SHIFTED:
-            resId = R.string.spoken_description_mode_symbol_shift;
-            break;
-        case KeyboardId.ELEMENT_PHONE:
-            resId = R.string.spoken_description_mode_phone;
-            break;
-        case KeyboardId.ELEMENT_PHONE_SYMBOLS:
-            resId = R.string.spoken_description_mode_phone_shift;
-            break;
-        default:
-            return;
-        }
-        final String text = mView.getContext().getString(resId);
-        sendWindowStateChanged(text);
-    }
-
-    /**
-     * Announces that the keyboard has been hidden.
-     */
-    private void announceKeyboardHidden() {
-        final Context context = mView.getContext();
-        final String text = context.getString(R.string.announce_keyboard_hidden);
-
-        sendWindowStateChanged(text);
-    }
-
-    /**
-     * Sends a window state change event with the specified text.
-     *
-     * @param text The text to send with the event.
-     */
-    private void sendWindowStateChanged(final String text) {
-        final AccessibilityEvent stateChange = AccessibilityEvent.obtain(
-                AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
-        mView.onInitializeAccessibilityEvent(stateChange);
-        stateChange.getText().add(text);
-        stateChange.setContentDescription(null);
-
-        final ViewParent parent = mView.getParent();
-        if (parent != null) {
-            parent.requestSendAccessibilityEvent(mView, stateChange);
-        }
-    }
-
-    /**
-     * Delegate method for View.getAccessibilityNodeProvider(). This method is called in SDK
-     * version 15 (Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) and higher to obtain the virtual
-     * node hierarchy provider.
-     *
-     * @param host The host view for the provider.
-     * @return The accessibility node provider for the current keyboard.
-     */
-    @Override
-    public MainKeyboardAccessibilityNodeProvider getAccessibilityNodeProvider(final View host) {
-        return getAccessibilityNodeProvider();
-    }
-
-    /**
-     * Receives hover events when touch exploration is turned on in SDK versions ICS and higher.
-     *
-     * @param event The hover event.
-     * @param keyDetector The {@link KeyDetector} to determine on which key the <code>event</code>
-     *     is hovering.
-     * @return {@code true} if the event is handled
-     */
-    public boolean dispatchHoverEvent(final MotionEvent event, final KeyDetector keyDetector) {
-        final int x = (int) event.getX();
-        final int y = (int) event.getY();
-        final Key previousKey = mLastHoverKey;
-        final Key key;
-
-        if (pointInView(x, y)) {
-            key = keyDetector.detectHitKey(x, y);
-        } else {
-            key = null;
-        }
-        mLastHoverKey = key;
-
-        switch (event.getAction()) {
-        case MotionEvent.ACTION_HOVER_EXIT:
-            // Make sure we're not getting an EXIT event because the user slid
-            // off the keyboard area, then force a key press.
-            if (key != null) {
-                final long downTime = simulateKeyPress(key);
-                simulateKeyRelease(key, downTime);
-            }
-            //$FALL-THROUGH$
-        case MotionEvent.ACTION_HOVER_ENTER:
-            return onHoverKey(key, event);
-        case MotionEvent.ACTION_HOVER_MOVE:
-            if (key != previousKey) {
-                return onTransitionKey(key, previousKey, event);
-            }
-            return onHoverKey(key, event);
-        }
-        return false;
-    }
-
-    /**
-     * @return A lazily-instantiated node provider for this view delegate.
-     */
-    private MainKeyboardAccessibilityNodeProvider getAccessibilityNodeProvider() {
-        // Instantiate the provide only when requested. Since the system
-        // will call this method multiple times it is a good practice to
-        // cache the provider instance.
-        if (mAccessibilityNodeProvider == null) {
-            mAccessibilityNodeProvider = new MainKeyboardAccessibilityNodeProvider(mView);
-        }
-        return mAccessibilityNodeProvider;
-    }
-
-    /**
-     * Utility method to determine whether the given point, in local coordinates, is inside the
-     * view, where the area of the view is contracted by the edge slop factor.
-     *
-     * @param localX The local x-coordinate.
-     * @param localY The local y-coordinate.
-     */
-    private boolean pointInView(final int localX, final int localY) {
-        return (localX >= mEdgeSlop) && (localY >= mEdgeSlop)
-                && (localX < (mView.getWidth() - mEdgeSlop))
-                && (localY < (mView.getHeight() - mEdgeSlop));
-    }
-
-    /**
-     * Simulates a key press by injecting touch an event into the keyboard view.
-     * This avoids the complexity of trackers and listeners within the keyboard.
-     *
-     * @param key The key to press.
-     */
-    private long simulateKeyPress(final Key key) {
-        final int x = key.getHitBox().centerX();
-        final int y = key.getHitBox().centerY();
-        final long downTime = SystemClock.uptimeMillis();
-        final MotionEvent downEvent = MotionEvent.obtain(
-                downTime, downTime, MotionEvent.ACTION_DOWN, x, y, 0);
-        mView.onTouchEvent(downEvent);
-        downEvent.recycle();
-        return downTime;
-    }
-
-    /**
-     * Simulates a key release by injecting touch an event into the keyboard view.
-     * This avoids the complexity of trackers and listeners within the keyboard.
-     *
-     * @param key The key to release.
-     */
-    private void simulateKeyRelease(final Key key, final long downTime) {
-        final int x = key.getHitBox().centerX();
-        final int y = key.getHitBox().centerY();
-        final MotionEvent upEvent = MotionEvent.obtain(
-                downTime, SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, x, y, 0);
-        mView.onTouchEvent(upEvent);
-        upEvent.recycle();
-    }
-
-    /**
-     * Simulates a transition between two {@link Key}s by sending a HOVER_EXIT on the previous key,
-     * a HOVER_ENTER on the current key, and a HOVER_MOVE on the current key.
-     *
-     * @param currentKey The currently hovered key.
-     * @param previousKey The previously hovered key.
-     * @param event The event that triggered the transition.
-     * @return {@code true} if the event was handled.
-     */
-    private boolean onTransitionKey(final Key currentKey, final Key previousKey,
-            final MotionEvent event) {
-        final int savedAction = event.getAction();
-        event.setAction(MotionEvent.ACTION_HOVER_EXIT);
-        onHoverKey(previousKey, event);
-        event.setAction(MotionEvent.ACTION_HOVER_ENTER);
-        onHoverKey(currentKey, event);
-        event.setAction(MotionEvent.ACTION_HOVER_MOVE);
-        final boolean handled = onHoverKey(currentKey, event);
-        event.setAction(savedAction);
-        return handled;
-    }
-
-    /**
-     * Handles a hover event on a key. If {@link Key} extended View, this would be analogous to
-     * calling View.onHoverEvent(MotionEvent).
-     *
-     * @param key The currently hovered key.
-     * @param event The hover event.
-     * @return {@code true} if the event was handled.
-     */
-    private boolean onHoverKey(final Key key, final MotionEvent event) {
-        // Null keys can't receive events.
-        if (key == null) {
-            return false;
-        }
-        final MainKeyboardAccessibilityNodeProvider provider = getAccessibilityNodeProvider();
-
-        switch (event.getAction()) {
-        case MotionEvent.ACTION_HOVER_ENTER:
-            provider.sendAccessibilityEventForKey(
-                    key, AccessibilityEventCompat.TYPE_VIEW_HOVER_ENTER);
-            provider.performActionForKey(
-                    key, AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS, null);
-            break;
-        case MotionEvent.ACTION_HOVER_EXIT:
-            provider.sendAccessibilityEventForKey(
-                    key, AccessibilityEventCompat.TYPE_VIEW_HOVER_EXIT);
-            break;
-        }
-        return true;
-    }
-}