Home | History | Annotate | Download | only in keyguard 
      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License
     15  */
     16 
     17 package com.android.keyguard;
     18 
     19 import android.content.Context;
     20 import android.text.TextUtils;
     21 import android.view.View;
     22 import android.view.accessibility.AccessibilityEvent;
     23 import android.view.accessibility.AccessibilityNodeInfo;
     24 import android.widget.TextView;
     25 
     26 /**
     27  * Replaces fancy colons with regular colons. Only works on TextViews.
     28  */
     29 class KeyguardClockAccessibilityDelegate extends View.AccessibilityDelegate {
     30     private final String mFancyColon;
     31 
     32     public KeyguardClockAccessibilityDelegate(Context context) {
     33         mFancyColon = context.getString(R.string.keyguard_fancy_colon);
     34     }
     35 
     36     @Override
     37     public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) {
     38         super.onInitializeAccessibilityEvent(host, event);
     39         if (TextUtils.isEmpty(mFancyColon)) {
     40             return;
     41         }
     42         CharSequence text = event.getContentDescription();
     43         if (!TextUtils.isEmpty(text)) {
     44             event.setContentDescription(replaceFancyColon(text));
     45         }
     46     }
     47 
     48     @Override
     49     public void onPopulateAccessibilityEvent(View host, AccessibilityEvent event) {
     50         if (TextUtils.isEmpty(mFancyColon)) {
     51             super.onPopulateAccessibilityEvent(host, event);
     52         } else {
     53             CharSequence text = ((TextView) host).getText();
     54             if (!TextUtils.isEmpty(text)) {
     55                 event.getText().add(replaceFancyColon(text));
     56             }
     57         }
     58     }
     59 
     60     @Override
     61     public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) {
     62         super.onInitializeAccessibilityNodeInfo(host, info);
     63         if (TextUtils.isEmpty(mFancyColon)) {
     64             return;
     65         }
     66         if (!TextUtils.isEmpty(info.getText())) {
     67             info.setText(replaceFancyColon(info.getText()));
     68         }
     69         if (!TextUtils.isEmpty(info.getContentDescription())) {
     70             info.setContentDescription(replaceFancyColon(info.getContentDescription()));
     71         }
     72     }
     73 
     74     private CharSequence replaceFancyColon(CharSequence text) {
     75         if (TextUtils.isEmpty(mFancyColon)) {
     76             return text;
     77         }
     78         return text.toString().replace(mFancyColon, ":");
     79     }
     80 
     81     public static boolean isNeeded(Context context) {
     82         return !TextUtils.isEmpty(context.getString(R.string.keyguard_fancy_colon));
     83     }
     84 }
     85