lmi: parts: Introduce Refresh Rate QS tile

parts/AndroidManifest.xml

@@ -142,5 +142,16 @@
                 android:name="com.android.settings.summary"
                 android:resource="@string/htsr_enable_summary" />
         </activity>
+
+        <service
+            android:name=".RefreshRateTileService"
+            android:icon="@drawable/ic_qs_refresh_rate"
+            android:label="@string/refresh_rate_tile_title"
+            android:permission="android.permission.BIND_QUICK_SETTINGS_TILE">
+            <intent-filter>
+                <action android:name="android.service.quicksettings.action.QS_TILE"/>
+            </intent-filter>
+        </service>
+
     </application>
 </manifest>

parts/res/drawable/ic_qs_refresh_rate.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?android:attr/colorControlNormal">
+    <path
+        android:fillColor="#ff000000"
+        android:pathData="M17 1.01L7 1C5.9 1 5 1.9 5 3v18c0 1.1 0.9 2 2 2h10c1.1 0 2-0.9 2-2V3c0-1.1-0.9-1.99-2-1.99zM17 21H7V3h10v18z"/>
+    <path
+        android:fillColor="#ff000000"
+        android:pathData="M12 8c1.1 0 2.1 0.4 2.8 1.2L16 8v4h-4l1.8-1.8c-0.5-0.4-1.1-0.7-1.8-0.7c-1.4 0-2.5 1.1-2.5 2.5s1.1 2.5 2.5 2.5c0.8 0 1.5-0.4 2-1h1.7C15.1 15 13.7 16 12 16c-2.2 0-4-1.8-4-4s1.8-4 4-4z"/>
+</vector>

parts/res/values/strings.xml

@@ -125,4 +125,7 @@
     <!-- High Touch Polling Rate Support strings -->
     <string name="htsr_enable_title">Increase Touch Responsiveness</string>
     <string name="htsr_enable_summary">Increases touch polling rate to decrease latency</string>
+
+    <!-- Refresh Rate Settings -->
+    <string name="refresh_rate_tile_title">Refresh Rate</string>
 </resources>

parts/src/org/lineageos/settings/RefreshRateTileService.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2021 crDroid Android 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 org.lineageos.settings;
+
+import android.content.Context;
+import android.provider.Settings;
+import android.service.quicksettings.Tile;
+import android.service.quicksettings.TileService;
+import android.view.Display;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+public class RefreshRateTileService extends TileService {
+    private static final String KEY_MIN_REFRESH_RATE = "min_refresh_rate";
+    private static final String KEY_PEAK_REFRESH_RATE = "peak_refresh_rate";
+
+    private Context context;
+    private Tile tile;
+
+    private final List<Integer> availableRates = new ArrayList<>();
+    private int activeRateMin;
+    private int activeRateMax;
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        context = getApplicationContext();
+        Display.Mode mode = context.getDisplay().getMode();
+        Display.Mode[] modes = context.getDisplay().getSupportedModes();
+        for (Display.Mode m : modes) {
+            int rate = (int) Math.round(m.getRefreshRate());
+            if (m.getPhysicalWidth() == mode.getPhysicalWidth() &&
+                m.getPhysicalHeight() == mode.getPhysicalHeight()) {
+                availableRates.add(rate);
+            }
+        }
+        syncFromSettings();
+    }
+
+    private int getSettingOf(String key) {
+        float rate = Settings.System.getFloat(context.getContentResolver(), key, 60);
+        int active = availableRates.indexOf((int) Math.round(rate));
+        return Math.max(active, 0);
+    }
+
+    private void syncFromSettings() {
+        activeRateMin = getSettingOf(KEY_MIN_REFRESH_RATE);
+        activeRateMax = getSettingOf(KEY_PEAK_REFRESH_RATE);
+    }
+
+    private void cycleRefreshRate() {
+        if (activeRateMin < availableRates.size() - 1) {
+            activeRateMin++;
+        } else {
+            activeRateMin = 0;
+        }
+
+        float rate = availableRates.get(activeRateMin);
+        Settings.System.putFloat(context.getContentResolver(), KEY_MIN_REFRESH_RATE, rate);
+        Settings.System.putFloat(context.getContentResolver(), KEY_PEAK_REFRESH_RATE, rate);
+    }
+
+    private void updateTileView() {
+        String displayText;
+        int min = availableRates.get(activeRateMin);
+        int max = availableRates.get(activeRateMax);
+
+        displayText = String.format(Locale.US, min == max ? "%d Hz" : "%d - %d Hz", min, max);
+        tile.setContentDescription(displayText);
+        tile.setSubtitle(displayText);
+        tile.setState(min == max ? Tile.STATE_ACTIVE : Tile.STATE_INACTIVE);
+        tile.updateTile();
+    }
+
+    @Override
+    public void onStartListening() {
+        super.onStartListening();
+        tile = getQsTile();
+        syncFromSettings();
+        updateTileView();
+    }
+
+    @Override
+    public void onClick() {
+        super.onClick();
+        cycleRefreshRate();
+        syncFromSettings();
+        updateTileView();
+    }
+}