From 3b7dcd8d2384ee2edec3fdcf45919b248f8106b0 Mon Sep 17 00:00:00 2001
From: Chaohui Wang <chaohuiw@google.com>
Date: Wed, 3 Apr 2024 15:22:39 +0800
Subject: [Spa] Support override dialog window type

Cannot override window type for Compose dialog, so fallback to
androidx.appcompat.app.AlertDialog.

Bug: 332643450
fix: 337796129
Test: manual - with Settings
Change-Id: I3328816b0ea31896fb5f0d1393afdace2b2497fe
(cherry picked from commit 66c1c33c0fa71b25b7243f2543e8b25284ecf88d)
---
 packages/SettingsLib/Spa/spa/res/values/themes.xml |   5 +-
 .../widget/dialog/SettingsAlterDialogContent.kt    | 309 +++++++++++++++++++++
 2 files changed, 313 insertions(+), 1 deletion(-)
 create mode 100644 packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/dialog/SettingsAlterDialogContent.kt

diff --git a/packages/SettingsLib/Spa/spa/res/values/themes.xml b/packages/SettingsLib/Spa/spa/res/values/themes.xml
index b55dd1bc2439..a6d8ca4660cd 100644
--- a/packages/SettingsLib/Spa/spa/res/values/themes.xml
+++ b/packages/SettingsLib/Spa/spa/res/values/themes.xml
@@ -23,7 +23,10 @@
         <item name="android:windowNoTitle">true</item>
     </style>
 
-    <style name="Theme.SpaLib.Dialog" parent="Theme.Material3.DayNight.Dialog"/>
+    <style name="Theme.SpaLib.Dialog" parent="Theme.Material3.DayNight.Dialog">
+        <item name="android:windowBackground">@android:color/transparent</item>
+    </style>
+
     <style name="Theme.SpaLib.BottomSheetDialog" parent="Theme.SpaLib">
         <item name="android:windowBackground">@android:color/transparent</item>
         <item name="android:windowIsTranslucent">true</item>
diff --git a/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/dialog/SettingsAlterDialogContent.kt b/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/dialog/SettingsAlterDialogContent.kt
new file mode 100644
index 000000000000..bef0bca1c5a4
--- /dev/null
+++ b/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/dialog/SettingsAlterDialogContent.kt
@@ -0,0 +1,309 @@
+/*
+ * Copyright (C) 2024 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.settingslib.spa.widget.dialog
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.WarningAmber
+import androidx.compose.material3.AlertDialogDefaults
+import androidx.compose.material3.Button
+import androidx.compose.material3.Icon
+import androidx.compose.material3.LocalContentColor
+import androidx.compose.material3.LocalTextStyle
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.layout.Layout
+import androidx.compose.ui.layout.Placeable
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.util.fastForEach
+import androidx.compose.ui.util.fastForEachIndexed
+import com.android.settingslib.spa.framework.theme.SettingsShape
+import kotlin.math.max
+
+@Composable
+fun SettingsAlertDialogContent(
+    confirmButton: AlertDialogButton?,
+    dismissButton: AlertDialogButton?,
+    title: String?,
+    icon: @Composable (() -> Unit)? = {
+        Icon(
+            Icons.Default.WarningAmber,
+            contentDescription = null
+        )
+    },
+    text: @Composable (() -> Unit)?,
+) {
+    SettingsAlertDialogContent(
+        buttons = {
+            AlertDialogFlowRow(
+                mainAxisSpacing = ButtonsMainAxisSpacing,
+                crossAxisSpacing = ButtonsCrossAxisSpacing
+            ) {
+                dismissButton?.let {
+                    OutlinedButton(onClick = it.onClick) {
+                        Text(it.text)
+                    }
+                }
+                confirmButton?.let {
+                    Button(
+                        onClick = {
+                            it.onClick()
+                        },
+                    ) {
+                        Text(it.text)
+                    }
+                }
+            }
+        },
+        icon = icon,
+        modifier = Modifier.width(getDialogWidth()),
+        title = title?.let {
+            {
+                Text(
+                    it,
+                    modifier = Modifier.fillMaxWidth(),
+                    textAlign = TextAlign.Center
+                )
+            }
+        },
+        text = text?.let {
+            {
+                Column(Modifier.verticalScroll(rememberScrollState())) {
+                    text()
+                }
+            }
+        },
+    )
+}
+
+@Composable
+internal fun SettingsAlertDialogContent(
+    buttons: @Composable () -> Unit,
+    modifier: Modifier = Modifier,
+    icon: (@Composable () -> Unit)?,
+    title: (@Composable () -> Unit)?,
+    text: @Composable (() -> Unit)?,
+) {
+    Surface(
+        modifier = modifier,
+        shape = SettingsShape.CornerExtraLarge,
+        color = MaterialTheme.colorScheme.surfaceContainerHigh,
+    ) {
+        Column(
+            modifier = Modifier.padding(DialogPadding)
+        ) {
+            icon?.let {
+                CompositionLocalProvider(
+                    LocalContentColor provides AlertDialogDefaults.iconContentColor,
+                ) {
+                    Box(
+                        Modifier
+                            .padding(IconPadding)
+                            .align(Alignment.CenterHorizontally)
+                    ) {
+                        icon()
+                    }
+                }
+            }
+            title?.let {
+                ProvideContentColorTextStyle(
+                    contentColor = AlertDialogDefaults.titleContentColor,
+                    textStyle = MaterialTheme.typography.headlineSmall,
+                ) {
+                    Box(
+                        // Align the title to the center when an icon is present.
+                        Modifier
+                            .padding(TitlePadding)
+                            .align(
+                                if (icon == null) {
+                                    Alignment.Start
+                                } else {
+                                    Alignment.CenterHorizontally
+                                }
+                            )
+                    ) {
+                        title()
+                    }
+                }
+            }
+            text?.let {
+                ProvideContentColorTextStyle(
+                    contentColor = AlertDialogDefaults.textContentColor,
+                    textStyle = MaterialTheme.typography.bodyMedium
+                ) {
+                    Box(
+                        Modifier
+                            .weight(weight = 1f, fill = false)
+                            .padding(TextPadding)
+                            .align(Alignment.Start)
+                    ) {
+                        text()
+                    }
+                }
+            }
+            Box(modifier = Modifier.align(Alignment.End)) {
+                ProvideContentColorTextStyle(
+                    contentColor = MaterialTheme.colorScheme.primary,
+                    textStyle = MaterialTheme.typography.labelLarge,
+                    content = buttons
+                )
+            }
+        }
+    }
+}
+
+@Composable
+internal fun AlertDialogFlowRow(
+    mainAxisSpacing: Dp,
+    crossAxisSpacing: Dp,
+    content: @Composable () -> Unit
+) {
+    Layout(content) { measurables, constraints ->
+        val sequences = mutableListOf<List<Placeable>>()
+        val crossAxisSizes = mutableListOf<Int>()
+        val crossAxisPositions = mutableListOf<Int>()
+
+        var mainAxisSpace = 0
+        var crossAxisSpace = 0
+
+        val currentSequence = mutableListOf<Placeable>()
+        var currentMainAxisSize = 0
+        var currentCrossAxisSize = 0
+
+        // Return whether the placeable can be added to the current sequence.
+        fun canAddToCurrentSequence(placeable: Placeable) =
+            currentSequence.isEmpty() || currentMainAxisSize + mainAxisSpacing.roundToPx() +
+                placeable.width <= constraints.maxWidth
+
+        // Store current sequence information and start a new sequence.
+        fun startNewSequence() {
+            if (sequences.isNotEmpty()) {
+                crossAxisSpace += crossAxisSpacing.roundToPx()
+            }
+            // Ensures that confirming actions appear above dismissive actions.
+            @Suppress("ListIterator")
+            sequences.add(0, currentSequence.toList())
+            crossAxisSizes += currentCrossAxisSize
+            crossAxisPositions += crossAxisSpace
+
+            crossAxisSpace += currentCrossAxisSize
+            mainAxisSpace = max(mainAxisSpace, currentMainAxisSize)
+
+            currentSequence.clear()
+            currentMainAxisSize = 0
+            currentCrossAxisSize = 0
+        }
+
+        measurables.fastForEach { measurable ->
+            // Ask the child for its preferred size.
+            val placeable = measurable.measure(constraints)
+
+            // Start a new sequence if there is not enough space.
+            if (!canAddToCurrentSequence(placeable)) startNewSequence()
+
+            // Add the child to the current sequence.
+            if (currentSequence.isNotEmpty()) {
+                currentMainAxisSize += mainAxisSpacing.roundToPx()
+            }
+            currentSequence.add(placeable)
+            currentMainAxisSize += placeable.width
+            currentCrossAxisSize = max(currentCrossAxisSize, placeable.height)
+        }
+
+        if (currentSequence.isNotEmpty()) startNewSequence()
+
+        val mainAxisLayoutSize = max(mainAxisSpace, constraints.minWidth)
+
+        val crossAxisLayoutSize = max(crossAxisSpace, constraints.minHeight)
+
+        val layoutWidth = mainAxisLayoutSize
+
+        val layoutHeight = crossAxisLayoutSize
+
+        layout(layoutWidth, layoutHeight) {
+            sequences.fastForEachIndexed { i, placeables ->
+                val childrenMainAxisSizes = IntArray(placeables.size) { j ->
+                    placeables[j].width +
+                        if (j < placeables.lastIndex) mainAxisSpacing.roundToPx() else 0
+                }
+                val arrangement = Arrangement.End
+                val mainAxisPositions = IntArray(childrenMainAxisSizes.size) { 0 }
+                with(arrangement) {
+                    arrange(
+                        mainAxisLayoutSize, childrenMainAxisSizes,
+                        layoutDirection, mainAxisPositions
+                    )
+                }
+                placeables.fastForEachIndexed { j, placeable ->
+                    placeable.place(
+                        x = mainAxisPositions[j],
+                        y = crossAxisPositions[i]
+                    )
+                }
+            }
+        }
+    }
+}
+
+// Paddings for each of the dialog's parts.
+private val DialogPadding = PaddingValues(all = 24.dp)
+private val IconPadding = PaddingValues(bottom = 16.dp)
+private val TitlePadding = PaddingValues(bottom = 16.dp)
+private val TextPadding = PaddingValues(bottom = 24.dp)
+
+private val ButtonsMainAxisSpacing = 8.dp
+private val ButtonsCrossAxisSpacing = 12.dp
+
+/**
+ * ProvideContentColorTextStyle
+ *
+ * A convenience method to provide values to both LocalContentColor and LocalTextStyle in
+ * one call. This is less expensive than nesting calls to CompositionLocalProvider.
+ *
+ * Text styles will be merged with the current value of LocalTextStyle.
+ */
+@Composable
+private fun ProvideContentColorTextStyle(
+    contentColor: Color,
+    textStyle: TextStyle,
+    content: @Composable () -> Unit
+) {
+    val mergedStyle = LocalTextStyle.current.merge(textStyle)
+    CompositionLocalProvider(
+        LocalContentColor provides contentColor,
+        LocalTextStyle provides mergedStyle,
+        content = content
+    )
+}
-- 
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