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Commit 93d46d42 authored by Alexander Hofbauer's avatar Alexander Hofbauer
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.
parent 1145152e

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
@@ -792,4 +792,10 @@ 


    <!-- True if the Sym key should open the InputMethodPicker (default) -->

    <bool name="config_symKeyShowsImePicker">true</bool>



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

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



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

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

</resources>

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;
@@ -59,12 +60,15 @@ import android.provider.Settings; 


import com.android.internal.R;

import com.android.internal.app.ShutdownThread;

import com.android.internal.os.DeviceKeyHandler;

import com.android.internal.policy.PolicyManager;

import com.android.internal.statusbar.IStatusBarService;

import com.android.internal.telephony.ITelephony;

import com.android.internal.view.BaseInputHandler;

import com.android.internal.widget.PointerLocationView;



import dalvik.system.DexClassLoader;



import android.util.DisplayMetrics;

import android.util.EventLog;

import android.util.Log;
@@ -143,6 +147,7 @@ import java.io.FileDescriptor; 
import java.io.FileReader;

import java.io.IOException;

import java.io.PrintWriter;

import java.lang.reflect.Constructor;

import java.util.ArrayList;

import java.util.List;
@@ -255,6 +260,8 @@ 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
@@ -930,6 +937,30 @@ 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.equals("") && !deviceKeyHandlerClass.equals("")) {

            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, "Loaded device key handler");

            } catch (Exception e) {

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

                        + deviceKeyHandlerClass + " from class "

                        + deviceKeyHandlerLib, e);

            }

        }

    }



    public void setInitialDisplaySize(int width, int height) {
@@ -1828,6 +1859,14 @@ public class PhoneWindowManager implements WindowManagerPolicy { 
            showOrHideRecentAppsDialog(RECENT_APPS_BEHAVIOR_DISMISS_AND_SWITCH);

        }



        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;

    }