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
17package com.android.keyguard;
18
19import android.content.Context;
20import android.text.TextUtils;
21import android.view.View;
22import android.view.accessibility.AccessibilityEvent;
23import android.view.accessibility.AccessibilityNodeInfo;
24import android.widget.TextView;
25
26/**
27 * Replaces fancy colons with regular colons. Only works on TextViews.
28 */
29class 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