keyboard: re-add code to detect lid state and handle lights

Depends on libhardware patch for the light ids:
http://review.cyanogenmod.org/77944

This squashes the following commits from cm-11.0 and updates
them for cm-12.0:

From: Dave Daynard <nardholio@gmail.com>
Date: Tue, 19 Nov 2013 18:22:45 -0500
Subject: keyboard: re-add code to detect lid state

keyboard: re-add code to detect lid state

This was lost in the cm-11 merge. Without this, a change in lid state
isn't generated to light up the keyboard backlight

Change-Id: Ief35cebcb62da13afe1ae7531d69ab58e196be9e

From: YuanQY <yuanqingyun@gmail.com>
Date: Fri, 8 Feb 2013 10:59:22 +0800
Subject: Keyboard light: Fix the physical keyboard not light when

Keyboard light: Fix the physical keyboard not light when it's visiable.

Change-Id: I595afd3cb6b422a17ae0f6ec20aa51979db13810

From: tbalden <illespal@gmail.com>
Date: Sun, 31 Mar 2013 18:33:53 +0200
Subject: keyboard: adding functional alt/shift lights

keyboard: adding functional alt/shift lights

This is useful for devices that has QWERTY keyboard
and leds for the Alt/Shift (Fn/Caps) keys, like
htc doubleshot.

Change-Id: I66ebc2d881438f5b51db77eaa885421e65a7da0d

1 files changed, 31 insertions, 0 deletions

diff --git a/core/java/android/text/method/MetaKeyKeyListener.java b/core/java/android/text/method/MetaKeyKeyListener.java
index e9db5fd..569ca60 100644
--- a/core/java/android/text/method/MetaKeyKeyListener.java
+++ b/core/java/android/text/method/MetaKeyKeyListener.java
@@ -23,6 +23,9 @@ import android.text.Spanned;
 import android.view.KeyEvent;
 import android.view.View;
 import android.view.KeyCharacterMap;
+import android.os.IPowerManager;
+import android.os.RemoteException;
+import android.os.ServiceManager;
 
 /**
  * This base class encapsulates the behavior for tracking the state of
@@ -273,6 +276,14 @@ public abstract class MetaKeyKeyListener {
         adjust(content, CAP);
         adjust(content, ALT);
         adjust(content, SYM);
+        try {
+            IPowerManager power = IPowerManager.Stub.asInterface(
+                ServiceManager.getService("power"));
+            if (getMetaState(content, META_SHIFT_ON) <= 0)
+                power.setKeyboardLight(false, 1);
+            if (getMetaState(content, META_ALT_ON) <= 0)
+                power.setKeyboardLight(false, 2);
+        } catch (RemoteException doe) {}
     }
 
     /**
@@ -325,12 +336,32 @@ public abstract class MetaKeyKeyListener {
     public boolean onKeyDown(View view, Editable content, int keyCode, KeyEvent event) {
         if (keyCode == KeyEvent.KEYCODE_SHIFT_LEFT || keyCode == KeyEvent.KEYCODE_SHIFT_RIGHT) {
             press(content, CAP);
+            try {
+                IPowerManager power = IPowerManager.Stub.asInterface(
+                    ServiceManager.getService("power"));
+                int state = content.getSpanFlags(CAP);
+                if (state == PRESSED || state == LOCKED) {
+                    power.setKeyboardLight(true, 1);
+                } else {
+                    power.setKeyboardLight(false, 1);
+                }
+            } catch (RemoteException doe) {}
             return true;
         }
 
         if (keyCode == KeyEvent.KEYCODE_ALT_LEFT || keyCode == KeyEvent.KEYCODE_ALT_RIGHT
                 || keyCode == KeyEvent.KEYCODE_NUM) {
             press(content, ALT);
+            try {
+                IPowerManager power = IPowerManager.Stub.asInterface(
+                    ServiceManager.getService("power"));
+                int state = content.getSpanFlags(ALT);
+                if (state == PRESSED || state == LOCKED) {
+                    power.setKeyboardLight(true, 2);
+                } else {
+                    power.setKeyboardLight(false, 2);
+                }
+            } catch (RemoteException doe) {}
             return true;
         }