DeviceParts: S-Pen Power Saving Mode

Change-Id: Iff65e5517f3f0e74c177ca88d4c0332a37f352b5

5 files changed, 73 insertions, 0 deletions

diff --git a/DeviceSettings/res/values/strings.xml b/DeviceSettings/res/values/strings.xml
index 7a1ed16..c01afd5 100644
--- a/DeviceSettings/res/values/strings.xml
+++ b/DeviceSettings/res/values/strings.xml
@@ -24,6 +24,10 @@
     <string name="led_fade_title_head">LED Fading</string>
     <string name="led_fade_summary_head">Enable LED smooth fading instead of sharp blinking.</string>
 
+    <string name="spen_subcat_title">S-Pen</string>
+    <string name="spen_power_save_title_head">S-Pen Power Saving Mode</string>
+    <string name="spen_power_save_summary_head">Disable stylus digitizer when S-Pen is in device</string>
+
     <string name="touchkey_subcat_title">Touchkeys</string>
     <string name="touchkey_light_title_head">Backlight</string>
     <string name="touchkey_light_summary_off">Enable backlight</string>
diff --git a/DeviceSettings/res/xml/screen_preferences.xml b/DeviceSettings/res/xml/screen_preferences.xml
index aff39c0..09b484c 100644
--- a/DeviceSettings/res/xml/screen_preferences.xml
+++ b/DeviceSettings/res/xml/screen_preferences.xml
@@ -44,6 +44,15 @@
     </PreferenceCategory>
 
     <PreferenceCategory
+                android:title="@string/spen_subcat_title">
+    <!-- SPen power saving mode -->
+    <com.cyanogenmod.settings.device.SPenPowerSavingMode
+                android:key="spen_power_save"
+                android:title="@string/spen_power_save_title_head"
+                android:summary="@string/spen_power_save_summary_head" />
+    </PreferenceCategory>
+
+    <PreferenceCategory
                 android:title="@string/touchkey_subcat_title">
     <!-- Touchkey backlight -->
     <CheckBoxPreference
diff --git a/DeviceSettings/src/com/cyanogenmod/settings/device/DeviceSettings.java b/DeviceSettings/src/com/cyanogenmod/settings/device/DeviceSettings.java
index 152e361..feb1f37 100644
--- a/DeviceSettings/src/com/cyanogenmod/settings/device/DeviceSettings.java
+++ b/DeviceSettings/src/com/cyanogenmod/settings/device/DeviceSettings.java
@@ -44,6 +44,7 @@ public class DeviceSettings extends FragmentActivity {
     public static final String KEY_LED_FADE = "led_fade";
     public static final String KEY_TOUCHKEY_LIGHT = "touchkey_light";
     public static final String KEY_TOUCHKEY_TIMEOUT = "touchkey_timeout";
+    public static final String KEY_SPEN_POWER_SAVING_MODE = "spen_power_saving";
 
     ViewPager mViewPager;
     TabsAdapter mTabsAdapter;
diff --git a/DeviceSettings/src/com/cyanogenmod/settings/device/SPenPowerSavingMode.java b/DeviceSettings/src/com/cyanogenmod/settings/device/SPenPowerSavingMode.java
new file mode 100644
index 0000000..719139f
--- /dev/null
+++ b/DeviceSettings/src/com/cyanogenmod/settings/device/SPenPowerSavingMode.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2012 The CyanogenMod 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.cyanogenmod.settings.device;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.util.AttributeSet;
+import android.preference.CheckBoxPreference;
+import android.preference.Preference;
+import android.preference.Preference.OnPreferenceChangeListener;
+import android.preference.PreferenceManager;
+
+public class SPenPowerSavingMode extends CheckBoxPreference implements OnPreferenceChangeListener {
+
+    private static final String FILE = "/sys/class/sec/sec_epen/epen_saving_mode";
+
+    public SPenPowerSavingMode(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        this.setOnPreferenceChangeListener(this);
+    }
+
+    public static boolean isSupported() {
+        return Utils.fileExists(FILE);
+    }
+
+    /**
+     * Restore s-pen setting from SharedPreferences. (Write to kernel.)
+     * @param context       The context to read the SharedPreferences from
+     */
+    public static void restore(Context context) {
+        if (!isSupported()) {
+            return;
+        }
+
+        SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
+        Utils.writeValue(FILE, sharedPrefs.getBoolean(DeviceSettings.KEY_SPEN_POWER_SAVING_MODE, false) ? "1" : "0");
+    }
+
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        Utils.writeValue(FILE, ((Boolean) newValue) ? "1" : "0");
+        return true;
+    }
+}
diff --git a/DeviceSettings/src/com/cyanogenmod/settings/device/Startup.java b/DeviceSettings/src/com/cyanogenmod/settings/device/Startup.java
index dc9ec9c..a24185c 100644
--- a/DeviceSettings/src/com/cyanogenmod/settings/device/Startup.java
+++ b/DeviceSettings/src/com/cyanogenmod/settings/device/Startup.java
@@ -34,5 +34,6 @@ public class Startup extends BroadcastReceiver {
         LedFade.restore(context);
         VibratorIntensity.restore(context);
         TouchkeyTimeout.restore(context);
+        SPenPowerSavingMode.restore(context);
     }
 }