Enable color temperature developer setting

Manual merge from mnc-dr1.5-dev.
Add a switch in Developer Settings to enable "cool" color temperature mode.

Bug: 26110238
Change-Id: Id0ab3283c1ee3208287c8dca11298a4bc367b314

res/values/config.xml

@@ -35,4 +35,7 @@
     <!-- Carrier_enabled editable -->
     <bool name="config_allow_edit_carrier_enabled" translatable="false">false</bool>
 
+    <!-- When true enable color temperature setting. -->
+    <bool name="config_enableColorTemperature">false</bool>
+
 </resources>

res/xml/development_prefs.xml

@@ -86,6 +86,12 @@
         android:dialogTitle="@string/select_webview_provider_dialog_title"
         android:summary="%s" />
 
+    <SwitchPreference
+        android:key="color_temperature"
+        android:title="@string/color_temperature"
+        android:summary="@string/color_temperature_desc"
+        android:persistent="false" />
+
     <PreferenceCategory android:key="debug_debugging_category"
             android:title="@string/debug_debugging_category">
 

src/com/android/settings/DevelopmentSettings.java

@@ -124,6 +124,7 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
     private static final String BUGREPORT_IN_POWER_KEY = "bugreport_in_power";
     private static final String OPENGL_TRACES_PROPERTY = "debug.egl.trace";
     private static final String TUNER_UI_KEY = "tuner_ui";
+    private static final String COLOR_TEMPERATURE_PROPERTY = "persist.sys.debug.color_temp";
 
     private static final String DEBUG_APP_KEY = "debug_app";
     private static final String WAIT_FOR_DEBUGGER_KEY = "wait_for_debugger";
@@ -177,6 +178,7 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
     private static final String KEY_COLOR_MODE = "color_mode";
     private static final String FORCE_RESIZABLE_KEY = "force_resizable_activities";
     private static final String ENABLE_FREEFORM_SUPPORT_KEY = "enable_freeform_support";
+    private static final String COLOR_TEMPERATURE_KEY = "color_temperature";
 
     private static final String INACTIVE_APPS_KEY = "inactive_apps";
 
@@ -285,6 +287,8 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
 
     private SwitchPreference mEnableFreeformSupport;
 
+    private SwitchPreference mColorTemperaturePreference;
+
     private final ArrayList<Preference> mAllPrefs = new ArrayList<Preference>();
 
     private final ArrayList<SwitchPreference> mResetSwitchPrefs
@@ -480,6 +484,15 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
             mColorModePreference = null;
         }
         updateWebViewProviderOptions();
+
+        mColorTemperaturePreference = (SwitchPreference) findPreference(COLOR_TEMPERATURE_KEY);
+        if (getResources().getBoolean(R.bool.config_enableColorTemperature)) {
+            mAllPrefs.add(mColorTemperaturePreference);
+            mResetSwitchPrefs.add(mColorTemperaturePreference);
+        } else {
+            removePreference(COLOR_TEMPERATURE_KEY);
+            mColorTemperaturePreference = null;
+        }
     }
 
     private ListPreference addListPreference(String prefKey) {
@@ -690,6 +703,9 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
         updateForceResizableOptions();
         updateEnableFreeformWindowsSupportOptions();
         updateWebViewProviderOptions();
+        if (mColorTemperaturePreference != null) {
+            updateColorTemperature();
+        }
     }
 
     private void resetDangerousOptions() {
@@ -1257,6 +1273,17 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
         }
     }
 
+    private void updateColorTemperature() {
+        updateSwitchPreference(mColorTemperaturePreference,
+                SystemProperties.getBoolean(COLOR_TEMPERATURE_PROPERTY, false));
+    }
+
+    private void writeColorTemperature() {
+        SystemProperties.set(COLOR_TEMPERATURE_PROPERTY,
+                mColorTemperaturePreference.isChecked() ? "1" : "0");
+        pokeSystemProperties();
+    }
+
     private void updateUSBAudioOptions() {
         updateSwitchPreference(mUSBAudio, Settings.Secure.getInt(getContentResolver(),
                 Settings.Secure.USB_AUDIO_AUTOMATIC_ROUTING_DISABLED, 0) != 0);
@@ -1830,6 +1857,8 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
             writeLegacyDhcpClientOptions();
         } else if (preference == mMobileDataAlwaysOn) {
             writeMobileDataAlwaysOnOptions();
+        } else if (preference == mColorTemperaturePreference) {
+            writeColorTemperature();
         } else if (preference == mUSBAudio) {
             writeUSBAudioOptions();
         } else if (preference == mForceResizable) {