From 39cb612e84e1fe0b9548383fda30974b11a5853a Mon Sep 17 00:00:00 2001
From: Luca Stefani <luca.stefani.ge1@gmail.com>
Date: Sat, 14 Jul 2018 20:29:40 +0200
Subject: [PATCH] Add a KeyHandler for tri-state-key events

Change-Id: I22a7ee5b7eec5667b14f1a587a6d0138e77dc0f3
---
 KeyHandler/Android.mk                         | 30 ++++++++
 KeyHandler/AndroidManifest.xml                | 20 +++++
 .../lineageos/settings/device/KeyHandler.java | 73 +++++++++++++++++++
 3 files changed, 123 insertions(+)
 create mode 100644 KeyHandler/Android.mk
 create mode 100644 KeyHandler/AndroidManifest.xml
 create mode 100644 KeyHandler/src/org/lineageos/settings/device/KeyHandler.java

diff --git a/KeyHandler/Android.mk b/KeyHandler/Android.mk
new file mode 100644
index 0000000..2a4b19b
--- /dev/null
+++ b/KeyHandler/Android.mk
@@ -0,0 +1,30 @@
+#
+# Copyright (C) 2018 The LineageOS 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.
+#
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+LOCAL_PACKAGE_NAME := KeyHandler
+
+LOCAL_CERTIFICATE := platform
+LOCAL_PRIVILEGED_MODULE := true
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_PROGUARD_ENABLED := disabled
+
+include $(BUILD_PACKAGE)
diff --git a/KeyHandler/AndroidManifest.xml b/KeyHandler/AndroidManifest.xml
new file mode 100644
index 0000000..4b74ee3
--- /dev/null
+++ b/KeyHandler/AndroidManifest.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2018 The LineageOS 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.
+-->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          android:sharedUserId="android.uid.system"
+          package="org.lineageos.settings.device">
+</manifest>
diff --git a/KeyHandler/src/org/lineageos/settings/device/KeyHandler.java b/KeyHandler/src/org/lineageos/settings/device/KeyHandler.java
new file mode 100644
index 0000000..49312a9
--- /dev/null
+++ b/KeyHandler/src/org/lineageos/settings/device/KeyHandler.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2018 The LineageOS 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.device;
+
+import android.content.Context;
+import android.media.AudioManager;
+import android.os.Vibrator;
+import android.view.KeyEvent;
+
+import com.android.internal.os.DeviceKeyHandler;
+
+public class KeyHandler implements DeviceKeyHandler {
+    private static final String TAG = KeyHandler.class.getSimpleName();
+
+    // Slider key codes
+    private static final int MODE_NORMAL = 601;
+    private static final int MODE_VIBRATION = 602;
+    private static final int MODE_SILENCE = 603;
+
+    private final Context mContext;
+    private final AudioManager mAudioManager;
+    private final Vibrator mVibrator;
+
+    public KeyHandler(Context context) {
+        mContext = context;
+
+        mAudioManager = mContext.getSystemService(AudioManager.class);
+        mVibrator = mContext.getSystemService(Vibrator.class);
+    }
+
+    public KeyEvent handleKeyEvent(KeyEvent event) {
+        int scanCode = event.getScanCode();
+
+        switch (scanCode) {
+            case MODE_NORMAL:
+                mAudioManager.setRingerModeInternal(AudioManager.RINGER_MODE_NORMAL);
+                break;
+            case MODE_VIBRATION:
+                mAudioManager.setRingerModeInternal(AudioManager.RINGER_MODE_VIBRATE);
+                break;
+            case MODE_SILENCE:
+                mAudioManager.setRingerModeInternal(AudioManager.RINGER_MODE_SILENT);
+                break;
+            default:
+                return event;
+        }
+        doHapticFeedback();
+
+        return null;
+    }
+
+    private void doHapticFeedback() {
+        if (mVibrator == null || !mVibrator.hasVibrator()) {
+            return;
+        }
+
+        mVibrator.vibrate(50);
+    }
+}