Adding ThemeManager as a centralized place for controlling icon theming

Bug: 381897614
Flag: EXEMPT refactor
Test: atest ThemeManagerTest

Change-Id: Ib1dafdcc303f05f78cf586741c3d35243ab06e69

tests/multivalentTests/src/com/android/launcher3/folder/PreviewItemManagerTest.kt

@@ -22,9 +22,8 @@ import android.os.Process
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.filters.SmallTest
 import com.android.launcher3.LauncherAppState
-import com.android.launcher3.LauncherPrefs.Companion.THEMED_ICONS
-import com.android.launcher3.LauncherPrefs.Companion.get
 import com.android.launcher3.graphics.PreloadIconDrawable
+import com.android.launcher3.graphics.ThemeManager
 import com.android.launcher3.icons.BitmapInfo
 import com.android.launcher3.icons.FastBitmapDrawable
 import com.android.launcher3.icons.IconCache
@@ -71,6 +70,9 @@ class PreviewItemManagerTest {
 
     private var defaultThemedIcons = false
 
+    private val themeManager: ThemeManager
+        get() = ThemeManager.INSTANCE.get(context)
+
     @Before
     fun setup() {
         modelHelper = LauncherModelHelper()
@@ -126,19 +128,19 @@ class PreviewItemManagerTest {
             folderItems[3].bitmap.withFlags(profileFlagOp(UserIconInfo.TYPE_WORK))
         folderItems[3].bitmap.themedBitmap = null
 
-        defaultThemedIcons = get(context).get(THEMED_ICONS)
+        defaultThemedIcons = themeManager.isMonoThemeEnabled
     }
 
     @After
     @Throws(Exception::class)
     fun tearDown() {
-        get(context).put(THEMED_ICONS, defaultThemedIcons)
+        themeManager.isMonoThemeEnabled = defaultThemedIcons
         modelHelper.destroy()
     }
 
     @Test
     fun checkThemedIconWithThemingOn_iconShouldBeThemed() {
-        get(context).put(THEMED_ICONS, true)
+        themeManager.isMonoThemeEnabled = true
         val drawingParams = PreviewItemDrawingParams(0f, 0f, 0f)
 
         previewItemManager.setDrawable(drawingParams, folderItems[0])
@@ -148,7 +150,7 @@ class PreviewItemManagerTest {
 
     @Test
     fun checkThemedIconWithThemingOff_iconShouldNotBeThemed() {
-        get(context).put(THEMED_ICONS, false)
+        themeManager.isMonoThemeEnabled = false
         val drawingParams = PreviewItemDrawingParams(0f, 0f, 0f)
 
         previewItemManager.setDrawable(drawingParams, folderItems[0])
@@ -158,7 +160,7 @@ class PreviewItemManagerTest {
 
     @Test
     fun checkUnthemedIconWithThemingOn_iconShouldNotBeThemed() {
-        get(context).put(THEMED_ICONS, true)
+        themeManager.isMonoThemeEnabled = true
         val drawingParams = PreviewItemDrawingParams(0f, 0f, 0f)
 
         previewItemManager.setDrawable(drawingParams, folderItems[1])
@@ -168,7 +170,7 @@ class PreviewItemManagerTest {
 
     @Test
     fun checkUnthemedIconWithThemingOff_iconShouldNotBeThemed() {
-        get(context).put(THEMED_ICONS, false)
+        themeManager.isMonoThemeEnabled = false
         val drawingParams = PreviewItemDrawingParams(0f, 0f, 0f)
 
         previewItemManager.setDrawable(drawingParams, folderItems[1])
@@ -178,7 +180,7 @@ class PreviewItemManagerTest {
 
     @Test
     fun checkThemedIconWithBadgeWithThemingOn_iconAndBadgeShouldBeThemed() {
-        get(context).put(THEMED_ICONS, true)
+        themeManager.isMonoThemeEnabled = true
         val drawingParams = PreviewItemDrawingParams(0f, 0f, 0f)
 
         previewItemManager.setDrawable(drawingParams, folderItems[2])
@@ -191,7 +193,7 @@ class PreviewItemManagerTest {
 
     @Test
     fun checkUnthemedIconWithBadgeWithThemingOn_badgeShouldBeThemed() {
-        get(context).put(THEMED_ICONS, true)
+        themeManager.isMonoThemeEnabled = true
         val drawingParams = PreviewItemDrawingParams(0f, 0f, 0f)
 
         previewItemManager.setDrawable(drawingParams, folderItems[3])
@@ -204,7 +206,7 @@ class PreviewItemManagerTest {
 
     @Test
     fun checkUnthemedIconWithBadgeWithThemingOff_iconAndBadgeShouldNotBeThemed() {
-        get(context).put(THEMED_ICONS, false)
+        themeManager.isMonoThemeEnabled = false
         val drawingParams = PreviewItemDrawingParams(0f, 0f, 0f)
 
         previewItemManager.setDrawable(drawingParams, folderItems[3])

tests/multivalentTests/src/com/android/launcher3/graphics/ThemeManagerTest.kt

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2025 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.launcher3.graphics
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.launcher3.FakeLauncherPrefs
+import com.android.launcher3.dagger.LauncherAppComponent
+import com.android.launcher3.dagger.LauncherAppModule
+import com.android.launcher3.dagger.LauncherAppSingleton
+import com.android.launcher3.util.Executors.MAIN_EXECUTOR
+import com.android.launcher3.util.SandboxApplication
+import com.android.launcher3.util.TestUtil
+import dagger.Component
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNotEquals
+import org.junit.Assert.assertTrue
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class ThemeManagerTest {
+
+    @get:Rule val context = SandboxApplication()
+
+    lateinit var themeManager: ThemeManager
+
+    @Before
+    fun setUp() {
+        context.initDaggerComponent(DaggerThemeManagerComponent.builder())
+        themeManager = ThemeManager.INSTANCE[context]
+    }
+
+    @Test
+    fun `isMonoThemeEnabled get and set`() {
+        themeManager.isMonoThemeEnabled = true
+        TestUtil.runOnExecutorSync(MAIN_EXECUTOR) {}
+        assertTrue(themeManager.isMonoThemeEnabled)
+        assertTrue(themeManager.iconState.isMonoTheme)
+
+        themeManager.isMonoThemeEnabled = false
+        TestUtil.runOnExecutorSync(MAIN_EXECUTOR) {}
+        assertFalse(themeManager.isMonoThemeEnabled)
+        assertFalse(themeManager.iconState.isMonoTheme)
+    }
+
+    @Test
+    fun `callback called on theme change`() {
+        themeManager.isMonoThemeEnabled = false
+
+        var callbackCalled = false
+        themeManager.addChangeListener { callbackCalled = true }
+        themeManager.isMonoThemeEnabled = true
+        TestUtil.runOnExecutorSync(MAIN_EXECUTOR) {}
+
+        assertTrue(callbackCalled)
+    }
+
+    @Test
+    fun `iconState changes with theme`() {
+        themeManager.isMonoThemeEnabled = false
+        TestUtil.runOnExecutorSync(MAIN_EXECUTOR) {}
+        val disabledIconState = themeManager.iconState
+
+        themeManager.isMonoThemeEnabled = true
+        TestUtil.runOnExecutorSync(MAIN_EXECUTOR) {}
+        assertNotEquals(disabledIconState, themeManager.iconState)
+
+        themeManager.isMonoThemeEnabled = false
+        TestUtil.runOnExecutorSync(MAIN_EXECUTOR) {}
+        assertEquals(disabledIconState, themeManager.iconState)
+    }
+}
+
+@LauncherAppSingleton
+@Component(modules = [LauncherAppModule::class])
+interface ThemeManagerComponent : LauncherAppComponent {
+
+    override fun getLauncherPrefs(): FakeLauncherPrefs
+
+    @Component.Builder
+    interface Builder : LauncherAppComponent.Builder {
+
+        override fun build(): ThemeManagerComponent
+    }
+}