1 /*
2  * Copyright (C) 2024 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.systemui.volume
18 
19 import android.os.Bundle
20 import android.view.View
21 import android.view.View.AccessibilityDelegate
22 import android.view.accessibility.AccessibilityNodeInfo
23 import android.widget.SeekBar
24 import com.android.internal.R
25 
26 class VolumeDialogSeekBarAccessibilityDelegate(
27     private val accessibilityStep: Int,
28 ) : AccessibilityDelegate() {
29 
performAccessibilityActionnull30     override fun performAccessibilityAction(host: View, action: Int, args: Bundle?): Boolean {
31         require(host is SeekBar) { "This class only works with the SeekBar" }
32         val seekBar: SeekBar = host
33         if (
34             action == AccessibilityNodeInfo.ACTION_SCROLL_FORWARD ||
35                 action == AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD
36         ) {
37             var increment = accessibilityStep
38             if (action == AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD) {
39                 increment = -increment
40             }
41 
42             return super.performAccessibilityAction(
43                 host,
44                 R.id.accessibilityActionSetProgress,
45                 Bundle().apply {
46                     putFloat(
47                         AccessibilityNodeInfo.ACTION_ARGUMENT_PROGRESS_VALUE,
48                         (seekBar.progress + increment).coerceIn(seekBar.min, seekBar.max).toFloat(),
49                     )
50                 },
51             )
52         }
53         return super.performAccessibilityAction(host, action, args)
54     }
55 }
56