Support more keys accessibility mode

Bug: 12491371
Change-Id: Ib1fc8affbccfbaca3424ecdc2812f47047106aa2

1 files changed, 114 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/accessibility/MoreKeysKeyboardAccessibilityDelegate.java b/java/src/com/android/inputmethod/accessibility/MoreKeysKeyboardAccessibilityDelegate.java
new file mode 100644
index 000000000..3a56c5d2a
--- /dev/null
+++ b/java/src/com/android/inputmethod/accessibility/MoreKeysKeyboardAccessibilityDelegate.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2014 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.graphics.Rect;
+import android.util.Log;
+import android.view.MotionEvent;
+
+import com.android.inputmethod.keyboard.Key;
+import com.android.inputmethod.keyboard.KeyDetector;
+import com.android.inputmethod.keyboard.MoreKeysKeyboardView;
+import com.android.inputmethod.latin.Constants;
+
+/**
+ * This class represents a delegate that can be registered in {@link MoreKeysKeyboardView} to
+ * enhance accessibility support via composition rather via inheritance.
+ */
+public class MoreKeysKeyboardAccessibilityDelegate
+        extends KeyboardAccessibilityDelegate<MoreKeysKeyboardView> {
+    private static final String TAG = MoreKeysKeyboardAccessibilityDelegate.class.getSimpleName();
+
+    private final Rect mMoreKeysKeyboardValidBounds = new Rect();
+    private static final int CLOSING_INSET_IN_PIXEL = 1;
+    private int mOpenAnnounceResId;
+    private int mCloseAnnounceResId;
+
+    public MoreKeysKeyboardAccessibilityDelegate(final MoreKeysKeyboardView moreKeysKeyboardView,
+            final KeyDetector keyDetector) {
+        super(moreKeysKeyboardView, keyDetector);
+    }
+
+    public void setOpenAnnounce(final int resId) {
+        mOpenAnnounceResId = resId;
+    }
+
+    public void setCloseAnnounce(final int resId) {
+        mCloseAnnounceResId = resId;
+    }
+
+    public void onShowMoreKeysKeyboard() {
+        sendWindowStateChanged(mOpenAnnounceResId);
+    }
+
+    @Override
+    protected void onHoverEnter(final MotionEvent event) {
+        if (DEBUG_HOVER) {
+            Log.d(TAG, "onHoverEnter: key=" + getHoverKeyOf(event));
+        }
+        super.onHoverEnter(event);
+        final int actionIndex = event.getActionIndex();
+        final int x = (int)event.getX(actionIndex);
+        final int y = (int)event.getY(actionIndex);
+        final int pointerId = event.getPointerId(actionIndex);
+        final long eventTime = event.getEventTime();
+        mKeyboardView.onDownEvent(x, y, pointerId, eventTime);
+    }
+
+    @Override
+    protected void onHoverMove(final MotionEvent event) {
+        super.onHoverMove(event);
+        final int actionIndex = event.getActionIndex();
+        final int x = (int)event.getX(actionIndex);
+        final int y = (int)event.getY(actionIndex);
+        final int pointerId = event.getPointerId(actionIndex);
+        final long eventTime = event.getEventTime();
+        mKeyboardView.onMoveEvent(x, y, pointerId, eventTime);
+    }
+
+    @Override
+    protected void onHoverExit(final MotionEvent event) {
+        final Key lastKey = getLastHoverKey();
+        if (DEBUG_HOVER) {
+            Log.d(TAG, "onHoverExit: key=" + getHoverKeyOf(event) + " last=" + lastKey);
+        }
+        if (lastKey != null) {
+            super.onHoverExitFrom(lastKey);
+        }
+        setLastHoverKey(null);
+        final int actionIndex = event.getActionIndex();
+        final int x = (int)event.getX(actionIndex);
+        final int y = (int)event.getY(actionIndex);
+        final int pointerId = event.getPointerId(actionIndex);
+        final long eventTime = event.getEventTime();
+        // A hover exit event at one pixel width or height area on the edges of more keys keyboard
+        // are treated as closing.
+        mMoreKeysKeyboardValidBounds.set(0, 0, mKeyboardView.getWidth(), mKeyboardView.getHeight());
+        mMoreKeysKeyboardValidBounds.inset(CLOSING_INSET_IN_PIXEL, CLOSING_INSET_IN_PIXEL);
+        if (mMoreKeysKeyboardValidBounds.contains(x, y)) {
+            // Invoke {@link MoreKeysKeyboardView#onUpEvent(int,int,int,long)} as if this hover
+            // exit event selects a key.
+            mKeyboardView.onUpEvent(x, y, pointerId, eventTime);
+            mKeyboardView.dismissMoreKeysPanel();
+            return;
+        }
+        // Close the more keys keyboard.
+        mKeyboardView.onMoveEvent(
+                Constants.NOT_A_COORDINATE, Constants.NOT_A_COORDINATE, pointerId, eventTime);
+        sendWindowStateChanged(mCloseAnnounceResId);
+    }
+}