Add Settings for vector-specific PointerIcon scale.

Bug: 305193969
Test: PointerScaleSeekBarControllerTest
Flag: com.android.systemui.enable_vector_cursor_a11y_settings
Change-Id: I2f344f1d5fc6d5c8eb7159570287b8ce6f9ac070

res/values/dimens.xml

@@ -179,6 +179,9 @@
     <dimen name="pointer_fill_style_circle_padding">8dp</dimen>
     <dimen name="pointer_fill_style_shape_default_stroke">1dp</dimen>
     <dimen name="pointer_fill_style_shape_hovered_stroke">3dp</dimen>
+    <dimen name="pointer_scale_padding">8dp</dimen>
+    <item name="pointer_scale_size_start" format="float" type="dimen">1.0</item>
+    <item name="pointer_scale_size_end" format="float" type="dimen">2.5</item>
 
     <!-- RemoteAuth-->
     <dimen name="remoteauth_fragment_padding_horizontal">40dp</dimen>

res/values/integers.xml

@@ -36,4 +36,8 @@
     <integer name="enrollment_progress_minimum_time_display">0</integer>
     <!-- The time (in millis) to wait to collect messages in fingerprint enrollment before displaying it. -->
     <integer name="enrollment_collect_time">0</integer>
+
+    <!--  PointerIcon Settings  -->
+    <integer name="pointer_scale_seek_bar_start">0</integer>
+    <integer name="pointer_scale_seek_bar_end">3</integer>
 </resources>

res/values/strings.xml

@@ -4571,6 +4571,12 @@
 
     <!-- On Languages & input settings screen, setting summary.  Setting for mouse pointer speed. [CHAR LIMIT=35] -->
     <string name="pointer_speed">Pointer speed</string>
+    <!-- Setting for mouse pointer scale. [CHAR LIMIT=35] -->
+    <string name="pointer_scale">Pointer scale</string>
+    <!-- Content description for decreasing pointer scale. [CHAR LIMIT=35] -->
+    <string name="pointer_scale_decrease_content_description">Decrease pointer scale</string>
+    <!-- Setting for mouse pointer scale. [CHAR LIMIT=35] -->
+    <string name="pointer_scale_increase_content_description">Increase pointer scale</string>
 
     <!-- On Languages & input settings screen, heading. Inside the "Languages & input settings" screen, this is the header for settings that relate to game controller devices. [CHAR LIMIT=40] -->
     <string name="game_controller_settings_category">Game Controller</string>

res/xml/trackpad_settings.xml

@@ -66,9 +66,19 @@
         android:key="pointer_fill_style"
         android:title="@string/pointer_fill_style"
         android:order="50"
-        android:dialogTitle="@string/pointer_fill_style"
         settings:controller="com.android.settings.inputmethod.PointerFillStylePreferenceController"/>
 
+    <com.android.settings.widget.LabeledSeekBarPreference
+        android:key="pointer_scale"
+        android:title="@string/pointer_scale"
+        android:order="70"
+        android:max="@integer/pointer_scale_seek_bar_end"
+        settings:iconStart="@drawable/ic_remove_24dp"
+        settings:iconStartContentDescription="@string/pointer_scale_decrease_content_description"
+        settings:iconEnd="@drawable/ic_add_24dp"
+        settings:iconEndContentDescription="@string/pointer_scale_increase_content_description"
+        settings:controller="com.android.settings.inputmethod.PointerScaleSeekBarController" />
+
     <com.android.settingslib.widget.ButtonPreference
         android:key="trackpad_touch_gesture"
         android:title="@string/trackpad_touch_gesture"

src/com/android/settings/inputmethod/PointerScaleSeekBarController.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright 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.settings.inputmethod;
+
+import static android.view.PointerIcon.DEFAULT_POINTER_SCALE;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.widget.SeekBar;
+
+import androidx.annotation.NonNull;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.widget.LabeledSeekBarPreference;
+
+public class PointerScaleSeekBarController extends BasePreferenceController {
+
+    private final int mProgressMin;
+    private final int mProgressMax;
+    private final float mScaleMin;
+    private final float mScaleMax;
+
+    public PointerScaleSeekBarController(@NonNull Context context, @NonNull String key) {
+        super(context, key);
+
+        Resources res =  context.getResources();
+        mProgressMin = res.getInteger(R.integer.pointer_scale_seek_bar_start);
+        mProgressMax = res.getInteger(R.integer.pointer_scale_seek_bar_end);
+        mScaleMin = res.getFloat(R.dimen.pointer_scale_size_start);
+        mScaleMax = res.getFloat(R.dimen.pointer_scale_size_end);
+    }
+
+    @AvailabilityStatus
+    public int getAvailabilityStatus() {
+        return android.view.flags.Flags.enableVectorCursorA11ySettings() ? AVAILABLE
+                : CONDITIONALLY_UNAVAILABLE;
+    }
+
+    @Override
+    public void displayPreference(@NonNull PreferenceScreen screen) {
+        super.displayPreference(screen);
+
+        LabeledSeekBarPreference seekBarPreference = screen.findPreference(getPreferenceKey());
+        seekBarPreference.setMax(mProgressMax);
+        seekBarPreference.setContinuousUpdates(/* continuousUpdates= */ true);
+        seekBarPreference.setProgress(scaleToProgress(
+                Settings.System.getFloatForUser(mContext.getContentResolver(),
+                        Settings.System.POINTER_SCALE, DEFAULT_POINTER_SCALE,
+                        UserHandle.USER_CURRENT)));
+        seekBarPreference.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
+            @Override
+            public void onProgressChanged(@NonNull SeekBar seekBar, int progress,
+                    boolean fromUser) {
+                Settings.System.putFloatForUser(mContext.getContentResolver(),
+                        Settings.System.POINTER_SCALE, progressToScale(progress),
+                        UserHandle.USER_CURRENT);
+            }
+
+            @Override
+            public void onStartTrackingTouch(@NonNull SeekBar seekBar) {}
+
+            @Override
+            public void onStopTrackingTouch(@NonNull SeekBar seekBar) {}
+        });
+    }
+
+    private float progressToScale(int progress) {
+        return (((progress - mProgressMin) * (mScaleMax - mScaleMin)) / (mProgressMax
+                - mProgressMin)) + mScaleMin;
+    }
+
+    private int scaleToProgress(float scale) {
+        return (int) (
+                (((scale - mScaleMin) * (mProgressMax - mProgressMin)) / (mScaleMax - mScaleMin))
+                        + mProgressMin);
+    }
+}

tests/robotests/src/com/android/settings/inputmethod/PointerScaleSeekBarControllerTest.java

@@ -0,0 +1,94 @@
+/*
+ * 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.inputmethod;
+
+import static android.view.flags.Flags.enableVectorCursorA11ySettings;
+
+import static com.android.settings.core.BasePreferenceController.AVAILABLE;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assume.assumeTrue;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.widget.SeekBar;
+
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.testutils.shadow.ShadowSystemSettings;
+import com.android.settings.widget.LabeledSeekBarPreference;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+/** Tests for {@link PointerScaleSeekBarController} */
+@RunWith(RobolectricTestRunner.class)
+@Config(shadows = {
+        ShadowSystemSettings.class,
+})
+public class PointerScaleSeekBarControllerTest {
+
+    private static final String PREFERENCE_KEY = "pointer_scale";
+
+    @Rule public MockitoRule mMockitoRule = MockitoJUnit.rule();
+
+    @Mock private PreferenceScreen mPreferenceScreen;
+
+    private Context mContext;
+    private LabeledSeekBarPreference mPreference;
+    private PointerScaleSeekBarController mController;
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+        mPreference = new LabeledSeekBarPreference(mContext, null);
+        mController = new PointerScaleSeekBarController(mContext, PREFERENCE_KEY);
+    }
+
+    @Test
+    public void getAvailabilityStatus_flagEnabled() {
+        assumeTrue(enableVectorCursorA11ySettings());
+
+        assertEquals(mController.getAvailabilityStatus(), AVAILABLE);
+    }
+
+    @Test
+    public void onProgressChanged_changeListenerUpdatesSetting() {
+        when(mPreferenceScreen.findPreference(anyString())).thenReturn(mPreference);
+        mController.displayPreference(mPreferenceScreen);
+        SeekBar seekBar = mPreference.getSeekbar();
+        int sliderValue = 1;
+
+        mPreference.onProgressChanged(seekBar, sliderValue, false);
+
+        float expectedScale = 1.5f;
+        float currentScale = Settings.System.getFloatForUser(mContext.getContentResolver(),
+                Settings.System.POINTER_SCALE, -1, UserHandle.USER_CURRENT);
+        assertEquals(expectedScale, currentScale, /* delta= */ 0.001f);
+    }
+}