1 files changed, 90 insertions, 0 deletions
diff --git a/java/com/android/dialer/app/calllog/CallLogAlertManager.java b/java/com/android/dialer/app/calllog/CallLogAlertManager.java
new file mode 100644
index 000000000..40b30f001
--- /dev/null
+++ b/java/com/android/dialer/app/calllog/CallLogAlertManager.java
@@ -0,0 +1,90 @@
+/*
+ * 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.dialer.app.calllog;
+
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import com.android.dialer.app.R;
+import com.android.dialer.app.alert.AlertManager;
+import com.android.dialer.common.Assert;
+
+/** Manages "alerts" to be shown at the top of an call log to gain the user's attention. */
+public class CallLogAlertManager implements AlertManager {
+
+  private final CallLogAdapter adapter;
+  private final View view;
+  private final LayoutInflater inflater;
+  private final ViewGroup parent;
+  private final ViewGroup container;
+
+  public CallLogAlertManager(CallLogAdapter adapter, LayoutInflater inflater, ViewGroup parent) {
+    this.adapter = adapter;
+    this.inflater = inflater;
+    this.parent = parent;
+    view = inflater.inflate(R.layout.call_log_alert_item, parent, false);
+    container = (ViewGroup) view.findViewById(R.id.container);
+  }
+
+  @Override
+  public View inflate(int layoutId) {
+    return inflater.inflate(layoutId, container, false);
+  }
+
+  public RecyclerView.ViewHolder createViewHolder(ViewGroup parent) {
+    Assert.checkArgument(
+        parent == this.parent,
+        "createViewHolder should be called with the same parent in constructor");
+    return new AlertViewHolder(view);
+  }
+
+  public boolean isEmpty() {
+    return container.getChildCount() == 0;
+  }
+
+  public boolean contains(View view) {
+    return container.indexOfChild(view) != -1;
+  }
+
+  @Override
+  public void clear() {
+    container.removeAllViews();
+    adapter.notifyItemRemoved(CallLogAdapter.ALERT_POSITION);
+  }
+
+  @Override
+  public void add(View view) {
+    if (contains(view)) {
+      return;
+    }
+    container.addView(view);
+    if (container.getChildCount() == 1) {
+      // Was empty before
+      adapter.notifyItemInserted(CallLogAdapter.ALERT_POSITION);
+    }
+  }
+
+  /**
+   * Does nothing. The view this ViewHolder show is directly managed by {@link CallLogAlertManager}
+   */
+  private static class AlertViewHolder extends RecyclerView.ViewHolder {
+    private AlertViewHolder(View view) {
+      super(view);
+    }
+  }
+}