Initial checkin of AOSP Messaging app.

b/23110861

Change-Id: I11db999bd10656801e618f78ab2b2ef74136fff1

src/com/android/messaging/util/AccessibilityUtil.java

@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2015 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.messaging.util;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.support.v4.view.accessibility.AccessibilityEventCompat;
+import android.support.v4.view.accessibility.AccessibilityRecordCompat;
+import android.text.TextUtils;
+import android.view.View;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityManager;
+
+import com.android.messaging.Factory;
+import com.android.messaging.R;
+
+import javax.annotation.Nullable;
+
+public class AccessibilityUtil {
+    public static String sContentDescriptionDivider;
+
+    public static boolean isTouchExplorationEnabled(final Context context) {
+        final AccessibilityManager accessibilityManager = (AccessibilityManager)
+                context.getSystemService(Context.ACCESSIBILITY_SERVICE);
+        return accessibilityManager.isTouchExplorationEnabled();
+    }
+
+    public static StringBuilder appendContentDescription(final Context context,
+            final StringBuilder contentDescription, final String val) {
+        if (sContentDescriptionDivider == null) {
+            sContentDescriptionDivider =
+                    context.getResources().getString(R.string.enumeration_comma);
+        }
+        if (contentDescription.length() != 0) {
+            contentDescription.append(sContentDescriptionDivider);
+        }
+        contentDescription.append(val);
+        return contentDescription;
+    }
+
+    public static void announceForAccessibilityCompat(
+            final View view, @Nullable final AccessibilityManager accessibilityManager,
+            final int textResourceId) {
+        final String text = Factory.get().getApplicationContext().getResources().getString(
+                textResourceId);
+        announceForAccessibilityCompat(view, accessibilityManager, text);
+    }
+
+    public static void announceForAccessibilityCompat(
+            final View view, @Nullable AccessibilityManager accessibilityManager,
+            final CharSequence text) {
+        final Context context = view.getContext().getApplicationContext();
+        if (accessibilityManager == null) {
+            accessibilityManager = (AccessibilityManager) context.getSystemService(
+                    Context.ACCESSIBILITY_SERVICE);
+        }
+
+        if (!accessibilityManager.isEnabled()) {
+            return;
+        }
+
+        // Jelly Bean added support for speaking text verbatim
+        final int eventType = OsUtil.isAtLeastJB() ? AccessibilityEvent.TYPE_ANNOUNCEMENT
+                : AccessibilityEvent.TYPE_VIEW_FOCUSED;
+
+        // Construct an accessibility event with the minimum recommended
+        // attributes. An event without a class name or package may be dropped.
+        final AccessibilityEvent event = AccessibilityEvent.obtain(eventType);
+        event.getText().add(text);
+        event.setEnabled(view.isEnabled());
+        event.setClassName(view.getClass().getName());
+        event.setPackageName(context.getPackageName());
+
+        // JellyBean MR1 requires a source view to set the window ID.
+        final AccessibilityRecordCompat record = AccessibilityEventCompat.asRecord(event);
+        record.setSource(view);
+
+        // Sends the event directly through the accessibility manager. If we only supported SDK 14+
+        // we could have done:
+        // getParent().requestSendAccessibilityEvent(this, event);
+        accessibilityManager.sendAccessibilityEvent(event);
+    }
+
+    /**
+     * Check to see if the current layout is Right-to-Left. This check is only supported for
+     * API 17+.
+     * For earlier versions, this method will just return false.
+     * @return boolean Boolean indicating whether the currently locale is RTL.
+     */
+    public static boolean isLayoutRtl(final View view) {
+        if (OsUtil.isAtLeastJB_MR1()) {
+            return View.LAYOUT_DIRECTION_RTL == view.getLayoutDirection();
+        } else {
+            return false;
+        }
+    }
+
+    public static String getVocalizedPhoneNumber(final Resources res, final String phoneNumber) {
+        if (TextUtils.isEmpty(phoneNumber)) {
+            return "";
+        }
+        final StringBuilder vocalizedPhoneNumber = new StringBuilder();
+        for (final char c : phoneNumber.toCharArray()) {
+            getVocalizedNumber(res, c, vocalizedPhoneNumber);
+        }
+        return vocalizedPhoneNumber.toString();
+    }
+
+    public static void getVocalizedNumber(final Resources res, final char c,
+            final StringBuilder builder) {
+        switch (c) {
+            case '0':
+                builder.append(res.getString(R.string.content_description_for_number_zero));
+                builder.append(" ");
+                return;
+            case '1':
+                builder.append(res.getString(R.string.content_description_for_number_one));
+                builder.append(" ");
+                return;
+            case '2':
+                builder.append(res.getString(R.string.content_description_for_number_two));
+                builder.append(" ");
+                return;
+            case '3':
+                builder.append(res.getString(R.string.content_description_for_number_three));
+                builder.append(" ");
+                return;
+            case '4':
+                builder.append(res.getString(R.string.content_description_for_number_four));
+                builder.append(" ");
+                return;
+            case '5':
+                builder.append(res.getString(R.string.content_description_for_number_five));
+                builder.append(" ");
+                return;
+            case '6':
+                builder.append(res.getString(R.string.content_description_for_number_six));
+                builder.append(" ");
+                return;
+            case '7':
+                builder.append(res.getString(R.string.content_description_for_number_seven));
+                builder.append(" ");
+                return;
+            case '8':
+                builder.append(res.getString(R.string.content_description_for_number_eight));
+                builder.append(" ");
+                return;
+            case '9':
+                builder.append(res.getString(R.string.content_description_for_number_nine));
+                builder.append(" ");
+                return;
+            default:
+                builder.append(c);
+                return;
+        }
+    }
+}