1 /*
2 * Copyright (C) 2023 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.bouncer.ui.composable
18
19 import androidx.annotation.VisibleForTesting
20 import androidx.compose.material3.windowsizeclass.WindowHeightSizeClass
21 import androidx.compose.material3.windowsizeclass.WindowWidthSizeClass
22 import androidx.compose.runtime.Composable
23 import com.android.compose.windowsizeclass.LocalWindowSizeClass
24
25 /**
26 * Returns the [BouncerOverlayLayout] that should be used by the bouncer scene. If
27 * [isOneHandedModeSupported] is `false`, then [BouncerOverlayLayout.BESIDE_USER_SWITCHER] is
28 * replaced by [BouncerOverlayLayout.STANDARD_BOUNCER].
29 */
30 @Composable
calculateLayoutnull31 fun calculateLayout(isOneHandedModeSupported: Boolean): BouncerOverlayLayout {
32 val windowSizeClass = LocalWindowSizeClass.current
33
34 return calculateLayoutInternal(
35 width = windowSizeClass.widthSizeClass.toEnum(),
36 height = windowSizeClass.heightSizeClass.toEnum(),
37 isOneHandedModeSupported = isOneHandedModeSupported,
38 )
39 }
40
WindowWidthSizeClassnull41 private fun WindowWidthSizeClass.toEnum(): SizeClass {
42 return when (this) {
43 WindowWidthSizeClass.Compact -> SizeClass.COMPACT
44 WindowWidthSizeClass.Medium -> SizeClass.MEDIUM
45 WindowWidthSizeClass.Expanded -> SizeClass.EXPANDED
46 else -> error("Unsupported WindowWidthSizeClass \"$this\"")
47 }
48 }
49
WindowHeightSizeClassnull50 private fun WindowHeightSizeClass.toEnum(): SizeClass {
51 return when (this) {
52 WindowHeightSizeClass.Compact -> SizeClass.COMPACT
53 WindowHeightSizeClass.Medium -> SizeClass.MEDIUM
54 WindowHeightSizeClass.Expanded -> SizeClass.EXPANDED
55 else -> error("Unsupported WindowHeightSizeClass \"$this\"")
56 }
57 }
58
59 /** Enumerates all known adaptive layout configurations. */
60 enum class BouncerOverlayLayout {
61 /** The default UI with the bouncer laid out normally. */
62 STANDARD_BOUNCER,
63 /** The bouncer is displayed vertically stacked with the user switcher. */
64 BELOW_USER_SWITCHER,
65 /** The bouncer is displayed side-by-side with the user switcher or an empty space. */
66 BESIDE_USER_SWITCHER,
67 /** The bouncer is split in two with both sides shown side-by-side. */
68 SPLIT_BOUNCER,
69 }
70
71 /** Enumerates the supported window size classes. */
72 enum class SizeClass {
73 COMPACT,
74 MEDIUM,
75 EXPANDED,
76 }
77
78 /**
79 * Internal version of `calculateLayout` in the System UI Compose library, extracted here to allow
80 * for testing that's not dependent on Compose.
81 */
82 @VisibleForTesting
calculateLayoutInternalnull83 fun calculateLayoutInternal(
84 width: SizeClass,
85 height: SizeClass,
86 isOneHandedModeSupported: Boolean,
87 ): BouncerOverlayLayout {
88 return when (height) {
89 SizeClass.COMPACT -> BouncerOverlayLayout.SPLIT_BOUNCER
90 SizeClass.MEDIUM ->
91 when (width) {
92 SizeClass.COMPACT -> BouncerOverlayLayout.STANDARD_BOUNCER
93 SizeClass.MEDIUM -> BouncerOverlayLayout.STANDARD_BOUNCER
94 SizeClass.EXPANDED -> BouncerOverlayLayout.BESIDE_USER_SWITCHER
95 }
96 SizeClass.EXPANDED ->
97 when (width) {
98 SizeClass.COMPACT -> BouncerOverlayLayout.STANDARD_BOUNCER
99 SizeClass.MEDIUM -> BouncerOverlayLayout.BELOW_USER_SWITCHER
100 SizeClass.EXPANDED -> BouncerOverlayLayout.BESIDE_USER_SWITCHER
101 }
102 }.takeIf { it != BouncerOverlayLayout.BESIDE_USER_SWITCHER || isOneHandedModeSupported }
103 ?: BouncerOverlayLayout.STANDARD_BOUNCER
104 }
105