Split context menu display and population/handling

chrome/android/java/src/org/chromium/chrome/browser/contextmenu/PlatformContextMenuUi.java

Index: chrome/android/java/src/org/chromium/chrome/browser/contextmenu/PlatformContextMenuUi.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/PlatformContextMenuUi.java b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/PlatformContextMenuUi.java
new file mode 100644
index 0000000000000000000000000000000000000000..b2d849c9532d54de4ee043d8e35dcad4aad546a6
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/PlatformContextMenuUi.java
@@ -0,0 +1,55 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.contextmenu;
+
+import android.app.Activity;
+import android.content.Context;
+import android.util.Pair;
+import android.view.ContextMenu;
+import android.view.MenuItem;
+
+import org.chromium.base.Callback;
+
+import java.util.List;
+
+/**
+ * A context menu that displays the Android Standard Context Menu. Comes the Item Groups into one
+ * list displayed in the order received.
+ */
+public class PlatformContextMenuUi implements ContextMenuUi {
+    private ContextMenu mMenu;
+
+    PlatformContextMenuUi(ContextMenu menu) {
+        mMenu = menu;
+    }
+
+    @Override
+    public void displayMenu(Activity activity, ContextMenuParams params,
+            List<Pair<Integer, List<ContextMenuItem>>> itemGroups,
+            final Callback<Integer> listener) {
+        setHeaderText(activity, mMenu, ChromeContextMenuPopulator.createHeaderText(params));
+
+        MenuItem.OnMenuItemClickListener menuListener = new MenuItem.OnMenuItemClickListener() {
+            @Override
+            public boolean onMenuItemClick(MenuItem menuItem) {
+                listener.onResult(menuItem.getItemId());
+                return true;
+            }
+        };
+        for (int groupIndex = 0; groupIndex < itemGroups.size(); groupIndex++) {
+            List<ContextMenuItem> group = itemGroups.get(groupIndex).second;
+            for (int itemIndex = 0; itemIndex < group.size(); itemIndex++) {
+                ContextMenuItem item = group.get(itemIndex);
+                MenuItem menuItem = mMenu.add(0, item.menuId, 0, item.getString(activity));
+                menuItem.setOnMenuItemClickListener(menuListener);
+            }
+        }
+    }
+
+    private void setHeaderText(Context context, ContextMenu menu, String text) {
+        ContextMenuTitleView title = new ContextMenuTitleView(context, text);
+        menu.setHeaderView(title);
+    }
+}