Initial changes for recents.

Change-Id: Ide2c202b4a5b25410f0f32bd0a81ccf817ede38f
diff --git a/packages/SystemUI/src/com/android/systemui/recents/model/Task.java b/packages/SystemUI/src/com/android/systemui/recents/model/Task.java
new file mode 100644
index 0000000..9b03c5d
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/recents/model/Task.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2014 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.systemui.recents.model;
+
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.drawable.Drawable;
+import com.android.systemui.recents.Constants;
+
+
+/**
+ * A task represents the top most task in the system's task stack.
+ */
+public class Task {
+    public final int id;
+    public final Intent intent;
+    public String title;
+    public Drawable icon;
+    public Bitmap thumbnail;
+
+    TaskCallbacks mCb;
+
+    public Task(int id, Intent intent, String activityTitle, Drawable icon, Bitmap thumbnail) {
+        this.id = id;
+        this.intent = intent;
+        this.title = activityTitle;
+        this.icon = icon;
+        this.thumbnail = thumbnail;
+    }
+
+    /** Set the callbacks */
+    public void setCallbacks(TaskCallbacks cb) {
+        mCb = cb;
+    }
+
+    /** Notifies the callback listeners that this task's data has changed */
+    public void notifyTaskDataChanged() {
+        if (mCb != null) {
+            mCb.onTaskDataChanged(this);
+        }
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        // If we have multiple task entries for the same task, then we do the simple object
+        // equality check
+        if (Constants.Values.RecentsTaskLoader.TaskEntryMultiplier > 1) {
+            return super.equals(o);
+        }
+
+        // Otherwise, check that the id and intent match (the other fields can be asynchronously
+        // loaded and is unsuitable to testing the identity of this Task)
+        Task t = (Task) o;
+        return (id == t.id) &&
+                (intent.equals(t.intent));
+    }
+
+    @Override
+    public String toString() {
+        return "Task: " + intent.getComponent().getPackageName() + " [" + super.toString() + "]";
+    }
+}