1 files changed, 115 insertions, 0 deletions
diff --git a/services/core/java/com/android/server/wm/KeyguardDisableHandler.java b/services/core/java/com/android/server/wm/KeyguardDisableHandler.java
new file mode 100644
index 0000000..859df51
--- /dev/null
+++ b/services/core/java/com/android/server/wm/KeyguardDisableHandler.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2012 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.wm;
+
+import android.app.ActivityManagerNative;
+import android.app.admin.DevicePolicyManager;
+import android.content.Context;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Message;
+import android.os.RemoteException;
+import android.os.TokenWatcher;
+import android.os.UserHandle;
+import android.util.Log;
+import android.util.Pair;
+import android.view.WindowManagerPolicy;
+
+public class KeyguardDisableHandler extends Handler {
+    private static final String TAG = "KeyguardDisableHandler";
+
+    private static final int ALLOW_DISABLE_YES = 1;
+    private static final int ALLOW_DISABLE_NO = 0;
+    private static final int ALLOW_DISABLE_UNKNOWN = -1; // check with DevicePolicyManager
+    private int mAllowDisableKeyguard = ALLOW_DISABLE_UNKNOWN; // sync'd by mKeyguardTokenWatcher
+
+    // Message.what constants
+    static final int KEYGUARD_DISABLE = 1;
+    static final int KEYGUARD_REENABLE = 2;
+    static final int KEYGUARD_POLICY_CHANGED = 3;
+
+    final Context mContext;
+    final WindowManagerPolicy mPolicy;
+    KeyguardTokenWatcher mKeyguardTokenWatcher;
+
+    public KeyguardDisableHandler(final Context context, final WindowManagerPolicy policy) {
+        mContext = context;
+        mPolicy = policy;
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public void handleMessage(Message msg) {
+        if (mKeyguardTokenWatcher == null) {
+            mKeyguardTokenWatcher = new KeyguardTokenWatcher(this);
+        }
+
+        switch (msg.what) {
+            case KEYGUARD_DISABLE:
+                final Pair<IBinder, String> pair = (Pair<IBinder, String>)msg.obj;
+                mKeyguardTokenWatcher.acquire(pair.first, pair.second);
+                break;
+
+            case KEYGUARD_REENABLE:
+                mKeyguardTokenWatcher.release((IBinder)msg.obj);
+                break;
+
+            case KEYGUARD_POLICY_CHANGED:
+                mPolicy.enableKeyguard(true);
+                // lazily evaluate this next time we're asked to disable keyguard
+                mAllowDisableKeyguard = ALLOW_DISABLE_UNKNOWN;
+                break;
+        }
+    }
+
+    class KeyguardTokenWatcher extends TokenWatcher {
+
+        public KeyguardTokenWatcher(final Handler handler) {
+            super(handler, TAG);
+        }
+
+        @Override
+        public void acquired() {
+            // We fail safe and prevent disabling keyguard in the unlikely event this gets
+            // called before DevicePolicyManagerService has started.
+            if (mAllowDisableKeyguard == ALLOW_DISABLE_UNKNOWN) {
+                DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService(
+                        Context.DEVICE_POLICY_SERVICE);
+                if (dpm != null) {
+                    try {
+                        mAllowDisableKeyguard = dpm.getPasswordQuality(null, 
+                                ActivityManagerNative.getDefault().getCurrentUser().id)
+                                == DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED ?
+                                        ALLOW_DISABLE_YES : ALLOW_DISABLE_NO;
+                    } catch (RemoteException re) {
+                        // Nothing much we can do
+                    }
+                }
+            }
+            if (mAllowDisableKeyguard == ALLOW_DISABLE_YES) {
+                mPolicy.enableKeyguard(false);
+            } else {
+                Log.v(TAG, "Not disabling keyguard since device policy is enforced");
+            }
+        }
+
+        @Override
+        public void released() {
+            mPolicy.enableKeyguard(true);
+        }
+    }
+}