Use isEssentialPackage instead of isSystemPackage

This is faster, and we also no longer need to load the PackageInfos with
the deprecated flag PackageManager.GET_SIGNATURES.

Bug: 235727273
Test: Unit test
Test: Manually with Settings App
Change-Id: Ia09ed24ca2622a162ce6008fcd29a930812dbcc2

src/com/android/settings/spa/app/appinfo/AppButtons.kt

@@ -16,7 +16,7 @@
 
 package com.android.settings.spa.app.appinfo
 
-import android.content.pm.PackageInfo
+import android.content.pm.ApplicationInfo
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.remember
@@ -58,17 +58,17 @@ private class AppButtonsPresenter(private val packageInfoPresenter: PackageInfoP
     @Composable
     fun rememberActionsButtons() = remember {
         packageInfoPresenter.flow.map { packageInfo ->
-            if (packageInfo != null) getActionButtons(packageInfo) else emptyList()
+            if (packageInfo != null) getActionButtons(packageInfo.applicationInfo) else emptyList()
         }
     }.collectAsState(initial = emptyList())
 
-    private fun getActionButtons(packageInfo: PackageInfo): List<ActionButton> = listOfNotNull(
-        appLaunchButton.getActionButton(packageInfo),
-        appInstallButton.getActionButton(packageInfo),
-        appDisableButton.getActionButton(packageInfo),
-        appUninstallButton.getActionButton(packageInfo),
-        appClearButton.getActionButton(packageInfo),
-        appForceStopButton.getActionButton(packageInfo),
+    private fun getActionButtons(app: ApplicationInfo): List<ActionButton> = listOfNotNull(
+        appLaunchButton.getActionButton(app),
+        appInstallButton.getActionButton(app),
+        appDisableButton.getActionButton(app),
+        appUninstallButton.getActionButton(app),
+        appClearButton.getActionButton(app),
+        appForceStopButton.getActionButton(app),
     )
 
     @Composable

src/com/android/settings/spa/app/appinfo/AppClearButton.kt

@@ -16,7 +16,7 @@
 
 package com.android.settings.spa.app.appinfo
 
-import android.content.pm.PackageInfo
+import android.content.pm.ApplicationInfo
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.Delete
 import androidx.compose.material3.AlertDialog
@@ -37,8 +37,7 @@ class AppClearButton(
 
     private var openConfirmDialog by mutableStateOf(false)
 
-    fun getActionButton(packageInfo: PackageInfo): ActionButton? {
-        val app = packageInfo.applicationInfo
+    fun getActionButton(app: ApplicationInfo): ActionButton? {
         if (!app.isInstantApp) return null
 
         return clearButton()

src/com/android/settings/spa/app/appinfo/AppDisableButton.kt

@@ -17,7 +17,6 @@
 package com.android.settings.spa.app.appinfo
 
 import android.content.pm.ApplicationInfo
-import android.content.pm.PackageInfo
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.ArrowCircleDown
 import androidx.compose.material.icons.outlined.HideSource
@@ -52,13 +51,12 @@ class AppDisableButton(
 
     private var openConfirmDialog by mutableStateOf(false)
 
-    fun getActionButton(packageInfo: PackageInfo): ActionButton? {
-        val app = packageInfo.applicationInfo
+    fun getActionButton(app: ApplicationInfo): ActionButton? {
         if (!app.isSystemApp) return null
 
         return when {
             app.enabled && !app.isDisabledUntilUsed -> {
-                disableButton(app = app, enabled = isDisableButtonEnabled(packageInfo))
+                disableButton(app)
             }
 
             else -> enableButton()
@@ -68,38 +66,36 @@ class AppDisableButton(
     /**
      * Gets whether a package can be disabled.
      */
-    private fun isDisableButtonEnabled(packageInfo: PackageInfo): Boolean {
-        val packageName = packageInfo.packageName
-        val app = packageInfo.applicationInfo
-        return when {
-            packageName in applicationFeatureProvider.keepEnabledPackages -> false
+    private fun ApplicationInfo.canBeDisabled(): Boolean = when {
+        // Try to prevent the user from bricking their phone by not allowing disabling of apps
+        // signed with the system certificate.
+        isSignedWithPlatformKey -> false
 
-            // Home launcher apps need special handling. In system ones we don't risk downgrading
-            // because that can interfere with home-key resolution.
-            packageName in appButtonRepository.getHomePackageInfo().homePackages -> false
+        // system/vendor resource overlays can never be disabled.
+        isResourceOverlay -> false
 
-            // Try to prevent the user from bricking their phone by not allowing disabling of apps
-            // signed with the system certificate.
-            SettingsLibUtils.isSystemPackage(resources, packageManager, packageInfo) -> false
+        packageName in applicationFeatureProvider.keepEnabledPackages -> false
 
-            // We don't allow disabling DO/PO on *any* users if it's a system app, because
-            // "disabling" is actually "downgrade to the system version + disable", and "downgrade"
-            // will clear data on all users.
-            Utils.isProfileOrDeviceOwner(userManager, devicePolicyManager, packageName) -> false
+        // Home launcher apps need special handling. In system ones we don't risk downgrading
+        // because that can interfere with home-key resolution.
+        packageName in appButtonRepository.getHomePackageInfo().homePackages -> false
 
-            appButtonRepository.isDisallowControl(app) -> false
+        SettingsLibUtils.isEssentialPackage(resources, packageManager, packageName) -> false
 
-            // system/vendor resource overlays can never be disabled.
-            app.isResourceOverlay -> false
+        // We don't allow disabling DO/PO on *any* users if it's a system app, because
+        // "disabling" is actually "downgrade to the system version + disable", and "downgrade"
+        // will clear data on all users.
+        Utils.isProfileOrDeviceOwner(userManager, devicePolicyManager, packageName) -> false
 
-            else -> true
-        }
+        appButtonRepository.isDisallowControl(this) -> false
+
+        else -> true
     }
 
-    private fun disableButton(app: ApplicationInfo, enabled: Boolean) = ActionButton(
+    private fun disableButton(app: ApplicationInfo) = ActionButton(
         text = context.getString(R.string.disable_text),
         imageVector = Icons.Outlined.HideSource,
-        enabled = enabled,
+        enabled = app.canBeDisabled(),
     ) {
         // Currently we apply the same device policy for both the uninstallation and disable button.
         if (!appButtonRepository.isUninstallBlockedByAdmin(app)) {

src/com/android/settings/spa/app/appinfo/AppForceStopButton.kt

@@ -18,7 +18,6 @@ package com.android.settings.spa.app.appinfo
 
 import android.app.settings.SettingsEnums
 import android.content.pm.ApplicationInfo
-import android.content.pm.PackageInfo
 import android.os.UserManager
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.WarningAmber
@@ -48,8 +47,7 @@ class AppForceStopButton(
 
     private var openConfirmDialog by mutableStateOf(false)
 
-    fun getActionButton(packageInfo: PackageInfo): ActionButton {
-        val app = packageInfo.applicationInfo
+    fun getActionButton(app: ApplicationInfo): ActionButton {
         return ActionButton(
             text = context.getString(R.string.force_stop),
             imageVector = Icons.Outlined.WarningAmber,

src/com/android/settings/spa/app/appinfo/AppInstallButton.kt

@@ -18,7 +18,6 @@ package com.android.settings.spa.app.appinfo
 
 import android.content.Intent
 import android.content.pm.ApplicationInfo
-import android.content.pm.PackageInfo
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.FileDownload
 import com.android.settings.R
@@ -29,8 +28,7 @@ import com.android.settingslib.spaprivileged.model.app.userHandle
 class AppInstallButton(private val packageInfoPresenter: PackageInfoPresenter) {
     private val context = packageInfoPresenter.context
 
-    fun getActionButton(packageInfo: PackageInfo): ActionButton? {
-        val app = packageInfo.applicationInfo
+    fun getActionButton(app: ApplicationInfo): ActionButton? {
         if (!app.isInstantApp) return null
 
         return AppStoreUtil.getAppStoreLink(packageInfoPresenter.userContext, app.packageName)

src/com/android/settings/spa/app/appinfo/AppLaunchButton.kt

@@ -18,7 +18,6 @@ package com.android.settings.spa.app.appinfo
 
 import android.content.Intent
 import android.content.pm.ApplicationInfo
-import android.content.pm.PackageInfo
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.Launch
 import com.android.settings.R
@@ -29,9 +28,9 @@ class AppLaunchButton(packageInfoPresenter: PackageInfoPresenter) {
     private val context = packageInfoPresenter.context
     private val userPackageManager = packageInfoPresenter.userPackageManager
 
-    fun getActionButton(packageInfo: PackageInfo): ActionButton? =
-        userPackageManager.getLaunchIntentForPackage(packageInfo.packageName)?.let { intent ->
-            launchButton(intent, packageInfo.applicationInfo)
+    fun getActionButton(app: ApplicationInfo): ActionButton? =
+        userPackageManager.getLaunchIntentForPackage(app.packageName)?.let { intent ->
+            launchButton(intent, app)
         }
 
     private fun launchButton(intent: Intent, app: ApplicationInfo) = ActionButton(

src/com/android/settings/spa/app/appinfo/AppUninstallButton.kt

@@ -18,7 +18,6 @@ package com.android.settings.spa.app.appinfo
 
 import android.content.om.OverlayManager
 import android.content.pm.ApplicationInfo
-import android.content.pm.PackageInfo
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.Delete
 import com.android.settings.R
@@ -32,8 +31,7 @@ class AppUninstallButton(private val packageInfoPresenter: PackageInfoPresenter)
     private val appButtonRepository = AppButtonRepository(context)
     private val overlayManager = context.getSystemService(OverlayManager::class.java)!!
 
-    fun getActionButton(packageInfo: PackageInfo): ActionButton? {
-        val app = packageInfo.applicationInfo
+    fun getActionButton(app: ApplicationInfo): ActionButton? {
         if (app.isSystemApp || app.isInstantApp) return null
         return uninstallButton(app = app, enabled = isUninstallButtonEnabled(app))
     }

tests/spa_unit/src/com/android/settings/spa/app/appinfo/AppDisableButtonTest.kt

@@ -0,0 +1,168 @@
+/*
+ * Copyright (C) 2022 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.settings.spa.app.appinfo
+
+import android.app.admin.DevicePolicyManager
+import android.content.Context
+import android.content.pm.ApplicationInfo
+import android.content.pm.PackageManager
+import android.os.UserManager
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.android.dx.mockito.inline.extended.ExtendedMockito
+import com.android.settings.Utils
+import com.android.settings.testutils.FakeFeatureFactory
+import com.android.settingslib.spaprivileged.framework.common.devicePolicyManager
+import com.android.settingslib.spaprivileged.framework.common.userManager
+import com.google.common.truth.Truth.assertThat
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mock
+import org.mockito.MockitoSession
+import org.mockito.Spy
+import org.mockito.quality.Strictness
+import com.android.settingslib.Utils as SettingsLibUtils
+import org.mockito.Mockito.`when` as whenever
+
+@RunWith(AndroidJUnit4::class)
+class AppDisableButtonTest {
+
+    private lateinit var mockSession: MockitoSession
+
+    @Spy
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Mock
+    private lateinit var packageInfoPresenter: PackageInfoPresenter
+
+    @Mock
+    private lateinit var packageManager: PackageManager
+
+    @Mock
+    private lateinit var userManager: UserManager
+
+    @Mock
+    private lateinit var devicePolicyManager: DevicePolicyManager
+
+    private val fakeFeatureFactory = FakeFeatureFactory()
+    private val appFeatureProvider = fakeFeatureFactory.applicationFeatureProvider
+
+    private lateinit var appDisableButton: AppDisableButton
+
+    @Before
+    fun setUp() {
+        mockSession = ExtendedMockito.mockitoSession()
+            .initMocks(this)
+            .mockStatic(SettingsLibUtils::class.java)
+            .mockStatic(Utils::class.java)
+            .strictness(Strictness.LENIENT)
+            .startMocking()
+        whenever(packageInfoPresenter.context).thenReturn(context)
+        whenever(context.packageManager).thenReturn(packageManager)
+        whenever(context.userManager).thenReturn(userManager)
+        whenever(context.devicePolicyManager).thenReturn(devicePolicyManager)
+        whenever(appFeatureProvider.keepEnabledPackages).thenReturn(emptySet())
+        whenever(
+            SettingsLibUtils.isEssentialPackage(context.resources, packageManager, PACKAGE_NAME)
+        ).thenReturn(false)
+        whenever(Utils.isProfileOrDeviceOwner(userManager, devicePolicyManager, PACKAGE_NAME))
+            .thenReturn(false)
+        appDisableButton = AppDisableButton(packageInfoPresenter)
+    }
+
+    @After
+    fun tearDown() {
+        mockSession.finishMocking()
+    }
+
+    @Test
+    fun getActionButton_signedWithPlatformKey_cannotDisable() {
+        val app = enabledSystemApp {
+            privateFlags = privateFlags or ApplicationInfo.PRIVATE_FLAG_SIGNED_WITH_PLATFORM_KEY
+        }
+
+        val actionButton = appDisableButton.getActionButton(app)!!
+
+        assertThat(actionButton.enabled).isFalse()
+    }
+
+    @Test
+    fun getActionButton_isResourceOverlay_cannotDisable() {
+        val app = enabledSystemApp {
+            privateFlags = privateFlags or ApplicationInfo.PRIVATE_FLAG_IS_RESOURCE_OVERLAY
+        }
+
+        val actionButton = appDisableButton.getActionButton(app)!!
+
+        assertThat(actionButton.enabled).isFalse()
+    }
+
+    @Test
+    fun getActionButton_isKeepEnabledPackages_cannotDisable() {
+        whenever(appFeatureProvider.keepEnabledPackages).thenReturn(setOf(PACKAGE_NAME))
+        val app = enabledSystemApp()
+
+        val actionButton = appDisableButton.getActionButton(app)!!
+
+        assertThat(actionButton.enabled).isFalse()
+    }
+
+    @Test
+    fun getActionButton_isEssentialPackage_cannotDisable() {
+        whenever(
+            SettingsLibUtils.isEssentialPackage(context.resources, packageManager, PACKAGE_NAME)
+        ).thenReturn(true)
+        val app = enabledSystemApp()
+
+        val actionButton = appDisableButton.getActionButton(app)!!
+
+        assertThat(actionButton.enabled).isFalse()
+    }
+
+    @Test
+    fun getActionButton_isProfileOrDeviceOwner_cannotDisable() {
+        whenever(Utils.isProfileOrDeviceOwner(userManager, devicePolicyManager, PACKAGE_NAME))
+            .thenReturn(true)
+        val app = enabledSystemApp()
+
+        val actionButton = appDisableButton.getActionButton(app)!!
+
+        assertThat(actionButton.enabled).isFalse()
+    }
+
+    @Test
+    fun getActionButton_regularEnabledSystemApp_canDisable() {
+        val app = enabledSystemApp()
+
+        val actionButton = appDisableButton.getActionButton(app)!!
+
+        assertThat(actionButton.enabled).isTrue()
+    }
+
+    private fun enabledSystemApp(builder: ApplicationInfo.() -> Unit = {}) =
+        ApplicationInfo().apply {
+            packageName = PACKAGE_NAME
+            enabled = true
+            flags = ApplicationInfo.FLAG_SYSTEM
+        }.apply(builder)
+
+    private companion object {
+        const val PACKAGE_NAME = "package.name"
+    }
+}