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Commit 862f89d4 authored by Alexander Hofbauer's avatar Alexander Hofbauer Committed by Aaron Echols
Browse files

Dispatch keys to a device specific key handler 

Injects a device key handler into the input path to handle additional
keys (as found on some docks with a hardware keyboard).

Configurable via overlay settings config_deviceKeyHandlerLib and
config_deviceKeyHandlerClass.

Change-Id: I6678c89c7530fdb1d4d516ba4f1d2c9e30ce79a4

Conflicts:
	core/res/res/values/symbols.xml
parent cd9db1c8

core/java/com/android/internal/os/DeviceKeyHandler.java

0 → 100644
+21 −0
Original line number Diff line number Diff line 
/*

 * 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.android.internal.os;



import android.view.KeyEvent;



public interface DeviceKeyHandler {

    public static final int KEYEVENT_CAUGHT = -1;

    public static final int KEYEVENT_UNCAUGHT = 0;



    public int handleKeyEvent(KeyEvent event);

}

core/res/res/values/config.xml

+6 −0
Original line number Diff line number Diff line
@@ -1100,6 +1100,12 @@ 
         legacy USB manager should be started. -->

    <string name="config_legacyUmsLunFile">/sys/devices/platform/usb_mass_storage/lun0/file</string>



    <!-- Path to the library that contains a device specific key handler -->

    <string name="config_deviceKeyHandlerLib" translatable="false"></string>



    <!-- Name of that key handler class -->

    <string name="config_deviceKeyHandlerClass" translatable="false"></string>



    <!-- If a dock provides a lid switch, that lid can be removed. This

         setting is used to determine, whether lidOpenRotation has to be

         applied. -->

core/res/res/values/symbols.xml

+2 −0
Original line number Diff line number Diff line
@@ -1840,6 +1840,8 @@ 
  <java-symbol type="bool" name="config_hasRemovableLid" />

  <java-symbol type="bool" name="config_hasDockBattery" />

  <java-symbol type="bool" name="config_noDelayInATwoDP" />

  <java-symbol type="string" name="config_deviceKeyHandlerLib" />

  <java-symbol type="string" name="config_deviceKeyHandlerClass" />



  <!-- Telephony -->

  <java-symbol type="bool" name="config_smsSamsungCdmaAlternateMessageIDEncoding" />

policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

+39 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ import android.content.BroadcastReceiver; 
import android.content.ComponentName;

import android.content.ContentResolver;

import android.content.Context;

import android.content.ContextWrapper;

import android.content.Intent;

import android.content.IntentFilter;

import android.content.ServiceConnection;
@@ -67,6 +68,7 @@ import android.provider.Settings; 


import com.android.internal.R;

import com.android.internal.app.ThemeUtils;

import com.android.internal.os.DeviceKeyHandler;

import com.android.internal.policy.PolicyManager;

import com.android.internal.policy.impl.keyguard.KeyguardViewManager;

import com.android.internal.policy.impl.keyguard.KeyguardViewMediator;
@@ -74,6 +76,8 @@ import com.android.internal.statusbar.IStatusBarService; 
import com.android.internal.telephony.ITelephony;

import com.android.internal.widget.PointerLocationView;



import dalvik.system.DexClassLoader;



import android.util.DisplayMetrics;

import android.util.EventLog;

import android.util.Log;
@@ -166,6 +170,7 @@ import java.io.FileReader; 
import java.io.IOException;

import java.io.PrintWriter;

import java.util.List;

import java.lang.reflect.Constructor;



/**

 * WindowManagerPolicy implementation for the Android phone UI.  This
@@ -254,6 +259,8 @@ public class PhoneWindowManager implements WindowManagerPolicy { 
                KeyEvent.KEYCODE_CALCULATOR, Intent.CATEGORY_APP_CALCULATOR);

    }



    DeviceKeyHandler mDeviceKeyHandler;



    /**

     * Lock protecting internal state.  Must not call out into window

     * manager with lock held.  (This lock will be acquired in places
@@ -1198,6 +1205,30 @@ public class PhoneWindowManager implements WindowManagerPolicy { 
        } else {

            screenTurnedOff(WindowManagerPolicy.OFF_BECAUSE_OF_USER);

        }



        String deviceKeyHandlerLib = mContext.getResources().getString(

                com.android.internal.R.string.config_deviceKeyHandlerLib);



        String deviceKeyHandlerClass = mContext.getResources().getString(

                com.android.internal.R.string.config_deviceKeyHandlerClass);



        if (!deviceKeyHandlerLib.isEmpty() && !deviceKeyHandlerClass.isEmpty()) {

            DexClassLoader loader =  new DexClassLoader(deviceKeyHandlerLib,

                    new ContextWrapper(mContext).getCacheDir().getAbsolutePath(),

                    null,

                    ClassLoader.getSystemClassLoader());

            try {

                Class<?> klass = loader.loadClass(deviceKeyHandlerClass);

                Constructor<?> constructor = klass.getConstructor(Context.class);

                mDeviceKeyHandler = (DeviceKeyHandler) constructor.newInstance(

                        mContext);

                Slog.d(TAG, "Device key handler loaded");

            } catch (Exception e) {

                Slog.d(TAG, "Could not instantiate device key handler "

                        + deviceKeyHandlerClass + " from class "

                        + deviceKeyHandlerLib, e);

            }

        }

    }



    public void setInitialDisplaySize(Display display, int width, int height, int density) {
@@ -2496,6 +2527,14 @@ public class PhoneWindowManager implements WindowManagerPolicy { 
            return -1;

        }



        if (mDeviceKeyHandler != null) {

            try {

                return mDeviceKeyHandler.handleKeyEvent(event);

            } catch (Exception e) {

                Slog.d(TAG, "Could not dispatch event to device key handler", e);

            }

        }



        // Let the application handle the key.

        return 0;

    }