Move all contextual card related classes.

... from homepage to contextualcards.

Test: rebuild
Change-Id: Id7889566ce1e7257eb699d963ae996906fdb58ff

src/com/android/settings/homepage/contextualcards/ControllerRendererPool.java

@@ -0,0 +1,107 @@
+/*
+ * 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.settings.homepage.contextualcards;
+
+import android.content.Context;
+import android.util.Log;
+
+import androidx.collection.ArraySet;
+import androidx.lifecycle.LifecycleOwner;
+
+import com.android.settings.homepage.contextualcards.conditional.ConditionContextualCardController;
+import com.android.settings.homepage.contextualcards.conditional.ConditionContextualCardRenderer;
+import com.android.settings.homepage.contextualcards.slices.SliceContextualCardController;
+import com.android.settings.homepage.contextualcards.slices.SliceContextualCardRenderer;
+
+import java.util.Set;
+
+/**
+ * This is a fragment scoped singleton holding a set of {@link ContextualCardController} and
+ * {@link ContextualCardRenderer}.
+ */
+public class ControllerRendererPool {
+
+    private static final String TAG = "ControllerRendererPool";
+
+    private final Set<ContextualCardController> mControllers;
+    private final Set<ContextualCardRenderer> mRenderers;
+
+    public ControllerRendererPool() {
+        mControllers = new ArraySet<>();
+        mRenderers = new ArraySet<>();
+    }
+
+    public <T extends ContextualCardController> T getController(Context context,
+            @ContextualCard.CardType int cardType) {
+        final Class<? extends ContextualCardController> clz =
+                ContextualCardLookupTable.getCardControllerClass(cardType);
+        for (ContextualCardController controller : mControllers) {
+            if (controller.getClass() == clz) {
+                Log.d(TAG, "Controller is already there.");
+                return (T) controller;
+            }
+        }
+
+        final ContextualCardController controller = createCardController(context, clz);
+        if (controller != null) {
+            mControllers.add(controller);
+        }
+        return (T) controller;
+    }
+
+    public Set<ContextualCardController> getControllers() {
+        return mControllers;
+    }
+
+    public ContextualCardRenderer getRenderer(Context context, LifecycleOwner lifecycleOwner,
+            @ContextualCard.CardType int cardType) {
+        final Class<? extends ContextualCardRenderer> clz =
+                ContextualCardLookupTable.getCardRendererClasses(cardType);
+        for (ContextualCardRenderer renderer : mRenderers) {
+            if (renderer.getClass() == clz) {
+                Log.d(TAG, "Renderer is already there.");
+                return renderer;
+            }
+        }
+
+        final ContextualCardRenderer renderer = createCardRenderer(context, lifecycleOwner, clz);
+        if (renderer != null) {
+            mRenderers.add(renderer);
+        }
+        return renderer;
+    }
+
+    private ContextualCardController createCardController(Context context,
+            Class<? extends ContextualCardController> clz) {
+        if (ConditionContextualCardController.class == clz) {
+            return new ConditionContextualCardController(context);
+        } else if (SliceContextualCardController.class == clz) {
+            return new SliceContextualCardController();
+        }
+        return null;
+    }
+
+    private ContextualCardRenderer createCardRenderer(Context context,
+            LifecycleOwner lifecycleOwner, Class<?> clz) {
+        if (ConditionContextualCardRenderer.class == clz) {
+            return new ConditionContextualCardRenderer(context, this /*controllerRendererPool*/);
+        } else if (SliceContextualCardRenderer.class == clz) {
+            return new SliceContextualCardRenderer(context, lifecycleOwner);
+        }
+        return null;
+    }
+}