Merge "Add PluginInflateContainer"

4 files changed, 142 insertions, 2 deletions

diff --git a/packages/SystemUI/plugin/src/com/android/systemui/plugins/ViewProvider.java b/packages/SystemUI/plugin/src/com/android/systemui/plugins/ViewProvider.java
new file mode 100644
index 000000000000..18ca8e6e26a6
--- /dev/null
+++ b/packages/SystemUI/plugin/src/com/android/systemui/plugins/ViewProvider.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2016 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.plugins;
+
+import android.view.View;
+
+public interface ViewProvider extends Plugin {
+    View getView();
+}
diff --git a/packages/SystemUI/res/values/attrs.xml b/packages/SystemUI/res/values/attrs.xml
index cbaf23f85fdc..ad65f82ab956 100644
--- a/packages/SystemUI/res/values/attrs.xml
+++ b/packages/SystemUI/res/values/attrs.xml
@@ -108,5 +108,9 @@
         <attr name="enableAutoSizing" format="boolean" />
         <attr name="itemHeight" format="dimension" />
     </declare-styleable>
+
+    <declare-styleable name="PluginInflateContainer">
+        <attr name="viewType" format="string" />
+    </declare-styleable>
 </resources>
 
diff --git a/packages/SystemUI/src/com/android/systemui/AutoReinflateContainer.java b/packages/SystemUI/src/com/android/systemui/AutoReinflateContainer.java
index 2aca7889f31b..810dd8c403a7 100644
--- a/packages/SystemUI/src/com/android/systemui/AutoReinflateContainer.java
+++ b/packages/SystemUI/src/com/android/systemui/AutoReinflateContainer.java
@@ -72,9 +72,13 @@ public class AutoReinflateContainer extends FrameLayout {
         }
     }
 
-    private void inflateLayout() {
-        removeAllViews();
+    protected void inflateLayoutImpl() {
         LayoutInflater.from(getContext()).inflate(mLayout, this);
+    }
+
+    protected void inflateLayout() {
+        removeAllViews();
+        inflateLayoutImpl();
         final int N = mInflateListeners.size();
         for (int i = 0; i < N; i++) {
             mInflateListeners.get(i).onInflated(getChildAt(0));
diff --git a/packages/SystemUI/src/com/android/systemui/PluginInflateContainer.java b/packages/SystemUI/src/com/android/systemui/PluginInflateContainer.java
new file mode 100644
index 000000000000..efa7cae0821d
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/PluginInflateContainer.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2016 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;
+
+import android.annotation.Nullable;
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.View;
+
+import com.android.systemui.plugins.PluginListener;
+import com.android.systemui.plugins.PluginManager;
+import com.android.systemui.plugins.ViewProvider;
+
+/**
+ * Define an interface or abstract class as follows that includes the
+ * version and action.
+ *
+ * public interface MyInterface {
+ *     public static final String ACTION =
+ *             "com.android.systemui.action.PLUGIN_MYINTERFACE";
+ *
+ *     public static final int VERSION = 1;
+ *
+ *     void myImportantInterface();
+ * }
+ *
+ * Then put in a PluginInflateContainer to use and specify the interface
+ * or class that will be implemented as viewType.  The layout specified
+ * will be used by default and whenever a plugin is not present.
+ *
+ * <com.android.systemui.PluginInflateContainer
+ *     android:id="@+id/some_id"
+ *     android:layout_width="match_parent"
+ *     android:layout_height="match_parent"
+ *     android:layout="@layout/my_default_component"
+ *     systemui:viewType="com.android.systemui.plugins.MyInterface" />
+ */
+public class PluginInflateContainer extends AutoReinflateContainer
+        implements PluginListener<ViewProvider> {
+
+    private static final String TAG = "PluginInflateContainer";
+
+    private String mAction;
+    private int mVersion;
+    private View mPluginView;
+
+    public PluginInflateContainer(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PluginInflateContainer);
+        String viewType = a.getString(R.styleable.PluginInflateContainer_viewType);
+        try {
+            Class c = Class.forName(viewType);
+            mAction = (String) c.getDeclaredField("ACTION").get(null);
+            mVersion = (int) c.getDeclaredField("VERSION").get(null);
+        } catch (Exception e) {
+            Log.d(TAG, "Problem getting class info " + viewType, e);
+            mAction = null;
+            mVersion = 0;
+        }
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        if (mAction != null) {
+            PluginManager.getInstance(getContext()).addPluginListener(mAction, this, mVersion);
+        }
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        if (mAction != null) {
+            PluginManager.getInstance(getContext()).removePluginListener(this);
+        }
+    }
+
+    @Override
+    protected void inflateLayoutImpl() {
+        if (mPluginView != null) {
+            addView(mPluginView);
+        } else {
+            super.inflateLayoutImpl();
+        }
+    }
+
+    @Override
+    public void onPluginConnected(ViewProvider plugin) {
+        mPluginView = plugin.getView();
+        inflateLayout();
+    }
+
+    @Override
+    public void onPluginDisconnected(ViewProvider plugin) {
+        mPluginView = null;
+        inflateLayout();
+    }
+}