Adding TaskOverlayFactory to extend the TaskView behavior

Change-Id: I52e1a8b55174055268c8b0ef8c4336609d4d2a79

quickstep/res/values/config.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2018 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.
+-->
+<resources>
+    <string name="task_overlay_factory_class" translatable="false"></string>
+
+</resources>

quickstep/src/com/android/quickstep/TaskOverlayFactory.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2018 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.quickstep;
+
+import android.content.Context;
+import android.graphics.Matrix;
+import android.view.View;
+
+import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.util.Preconditions;
+import com.android.systemui.shared.recents.model.ThumbnailData;
+
+/**
+ * Factory class to create and add an overlays on the TaskView
+ */
+public class TaskOverlayFactory {
+
+    private static TaskOverlayFactory sInstance;
+
+    public static TaskOverlayFactory get(Context context) {
+        Preconditions.assertUIThread();
+        if (sInstance == null) {
+            sInstance = Utilities.getOverrideObject(TaskOverlayFactory.class,
+                    context.getApplicationContext(), R.string.task_overlay_factory_class);
+        }
+        return sInstance;
+    }
+
+    public TaskOverlay createOverlay(View thumbnailView) {
+        return new TaskOverlay();
+    }
+
+    public static class TaskOverlay {
+
+        public void setTaskInfo(ThumbnailData thumbnail, Matrix matrix) { }
+
+        public void reset() { }
+
+    }
+}

quickstep/src/com/android/quickstep/TaskThumbnailView.java

@@ -28,7 +28,6 @@ import android.graphics.LinearGradient;
 import android.graphics.Matrix;
 import android.graphics.Paint;
 import android.graphics.PorterDuff.Mode;
-import android.graphics.Rect;
 import android.graphics.Shader;
 import android.util.AttributeSet;
 import android.view.View;
@@ -36,6 +35,7 @@ import android.view.View;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
+import com.android.quickstep.TaskOverlayFactory.TaskOverlay;
 import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.recents.model.ThumbnailData;
 
@@ -49,6 +49,7 @@ public class TaskThumbnailView extends View {
     private final float mCornerRadius;
     private final float mFadeLength;
 
+    private final TaskOverlay mOverlay;
     private final Paint mPaint = new Paint();
 
     private final Matrix mMatrix = new Matrix();
@@ -70,6 +71,11 @@ public class TaskThumbnailView extends View {
         super(context, attrs, defStyleAttr);
         mCornerRadius = getResources().getDimension(R.dimen.task_corner_radius);
         mFadeLength = getResources().getDimension(R.dimen.task_fade_length);
+        mOverlay = TaskOverlayFactory.get(context).createOverlay(this);
+    }
+
+    public void bind() {
+        mOverlay.reset();
     }
 
     /**
@@ -89,6 +95,7 @@ public class TaskThumbnailView extends View {
             mBitmapShader = null;
             mThumbnailData = null;
             mPaint.setShader(null);
+            mOverlay.reset();
         }
         updateThumbnailPaintFilter();
     }
@@ -173,6 +180,8 @@ public class TaskThumbnailView extends View {
             }
             mPaint.setShader(shader);
         }
+
+        mOverlay.setTaskInfo(mThumbnailData, mMatrix);
         invalidate();
     }
 

quickstep/src/com/android/quickstep/TaskView.java

@@ -36,6 +36,7 @@ import android.widget.ImageView;
 import com.android.launcher3.R;
 import com.android.quickstep.RecentsView.PageCallbacks;
 import com.android.quickstep.RecentsView.ScrollState;
+import com.android.quickstep.TaskOverlayFactory.TaskOverlay;
 import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.recents.model.Task.TaskCallbacks;
 import com.android.systemui.shared.recents.model.ThumbnailData;
@@ -113,6 +114,7 @@ public class TaskView extends FrameLayout implements TaskCallbacks, PageCallback
             mTask.removeCallback(this);
         }
         mTask = task;
+        mSnapshotView.bind();
         task.addCallback(this);
     }