1 files changed, 206 insertions, 0 deletions
diff --git a/services/core/java/com/android/server/DockObserver.java b/services/core/java/com/android/server/DockObserver.java
new file mode 100644
index 0000000..4a8bf72
--- /dev/null
+++ b/services/core/java/com/android/server/DockObserver.java
@@ -0,0 +1,206 @@
+/*
+ * Copyright (C) 2008 The Android Open Source 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.server;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.media.AudioManager;
+import android.media.Ringtone;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.os.Handler;
+import android.os.Message;
+import android.os.PowerManager;
+import android.os.SystemClock;
+import android.os.UEventObserver;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.util.Log;
+import android.util.Slog;
+
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+
+/**
+ * <p>DockObserver monitors for a docking station.
+ */
+final class DockObserver extends UEventObserver {
+    private static final String TAG = DockObserver.class.getSimpleName();
+
+    private static final String DOCK_UEVENT_MATCH = "DEVPATH=/devices/virtual/switch/dock";
+    private static final String DOCK_STATE_PATH = "/sys/class/switch/dock/state";
+
+    private static final int MSG_DOCK_STATE_CHANGED = 0;
+
+    private final Object mLock = new Object();
+
+    private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
+    private int mPreviousDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
+
+    private boolean mSystemReady;
+
+    private final Context mContext;
+    private final PowerManager mPowerManager;
+    private final PowerManager.WakeLock mWakeLock;
+
+    public DockObserver(Context context) {
+        mContext = context;
+
+        mPowerManager = (PowerManager)mContext.getSystemService(Context.POWER_SERVICE);
+        mWakeLock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
+
+        init();  // set initial status
+        startObserving(DOCK_UEVENT_MATCH);
+    }
+
+    @Override
+    public void onUEvent(UEventObserver.UEvent event) {
+        if (Log.isLoggable(TAG, Log.VERBOSE)) {
+            Slog.v(TAG, "Dock UEVENT: " + event.toString());
+        }
+
+        synchronized (mLock) {
+            try {
+                int newState = Integer.parseInt(event.get("SWITCH_STATE"));
+                if (newState != mDockState) {
+                    mPreviousDockState = mDockState;
+                    mDockState = newState;
+                    if (mSystemReady) {
+                        // Wake up immediately when docked or undocked.
+                        mPowerManager.wakeUp(SystemClock.uptimeMillis());
+
+                        updateLocked();
+                    }
+                }
+            } catch (NumberFormatException e) {
+                Slog.e(TAG, "Could not parse switch state from event " + event);
+            }
+        }
+    }
+
+    private void init() {
+        synchronized (mLock) {
+            try {
+                char[] buffer = new char[1024];
+                FileReader file = new FileReader(DOCK_STATE_PATH);
+                try {
+                    int len = file.read(buffer, 0, 1024);
+                    mDockState = Integer.valueOf((new String(buffer, 0, len)).trim());
+                    mPreviousDockState = mDockState;
+                } finally {
+                    file.close();
+                }
+            } catch (FileNotFoundException e) {
+                Slog.w(TAG, "This kernel does not have dock station support");
+            } catch (Exception e) {
+                Slog.e(TAG, "" , e);
+            }
+        }
+    }
+
+    void systemReady() {
+        synchronized (mLock) {
+            // don't bother broadcasting undocked here
+            if (mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
+                updateLocked();
+            }
+            mSystemReady = true;
+        }
+    }
+
+    private void updateLocked() {
+        mWakeLock.acquire();
+        mHandler.sendEmptyMessage(MSG_DOCK_STATE_CHANGED);
+    }
+
+    private void handleDockStateChange() {
+        synchronized (mLock) {
+            Slog.i(TAG, "Dock state changed: " + mDockState);
+
+            // Skip the dock intent if not yet provisioned.
+            final ContentResolver cr = mContext.getContentResolver();
+            if (Settings.Global.getInt(cr,
+                    Settings.Global.DEVICE_PROVISIONED, 0) == 0) {
+                Slog.i(TAG, "Device not provisioned, skipping dock broadcast");
+                return;
+            }
+
+            // Pack up the values and broadcast them to everyone
+            Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
+            intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
+            intent.putExtra(Intent.EXTRA_DOCK_STATE, mDockState);
+
+            // Play a sound to provide feedback to confirm dock connection.
+            // Particularly useful for flaky contact pins...
+            if (Settings.Global.getInt(cr,
+                    Settings.Global.DOCK_SOUNDS_ENABLED, 1) == 1) {
+                String whichSound = null;
+                if (mDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
+                    if ((mPreviousDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
+                        (mPreviousDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
+                        (mPreviousDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
+                        whichSound = Settings.Global.DESK_UNDOCK_SOUND;
+                    } else if (mPreviousDockState == Intent.EXTRA_DOCK_STATE_CAR) {
+                        whichSound = Settings.Global.CAR_UNDOCK_SOUND;
+                    }
+                } else {
+                    if ((mDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
+                        (mDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
+                        (mDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
+                        whichSound = Settings.Global.DESK_DOCK_SOUND;
+                    } else if (mDockState == Intent.EXTRA_DOCK_STATE_CAR) {
+                        whichSound = Settings.Global.CAR_DOCK_SOUND;
+                    }
+                }
+
+                if (whichSound != null) {
+                    final String soundPath = Settings.Global.getString(cr, whichSound);
+                    if (soundPath != null) {
+                        final Uri soundUri = Uri.parse("file://" + soundPath);
+                        if (soundUri != null) {
+                            final Ringtone sfx = RingtoneManager.getRingtone(mContext, soundUri);
+                            if (sfx != null) {
+                                sfx.setStreamType(AudioManager.STREAM_SYSTEM);
+                                sfx.play();
+                            }
+                        }
+                    }
+                }
+            }
+
+            // Send the dock event intent.
+            // There are many components in the system watching for this so as to
+            // adjust audio routing, screen orientation, etc.
+            mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
+
+            // Release the wake lock that was acquired when the message was posted.
+            mWakeLock.release();
+        }
+    }
+
+    private final Handler mHandler = new Handler(true /*async*/) {
+        @Override
+        public void handleMessage(Message msg) {
+            switch (msg.what) {
+                case MSG_DOCK_STATE_CHANGED:
+                    handleDockStateChange();
+                    break;
+            }
+        }
+    };
+}