[Web Payments] Consolidate list code.

chrome/browser/ui/views/payments/payment_request_item_list.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_ITEM_LIST_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_ITEM_LIST_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 40 matching lines @@
 
     // Returns a pointer to the PaymentRequestItemList that owns this object.
     PaymentRequestItemList* list() { return list_; }
 
     // Returns a pointer to the PaymentRequestSpec/State objects associated with
     // this instance of the UI.
     PaymentRequestSpec* spec() { return spec_; }
     PaymentRequestState* state() { return state_; }
 
    protected:
-    // Creates and returns the view associated with this list item.
-    virtual std::unique_ptr<views::View> CreateItemView() = 0;
-
     // Called when the selected state of this item changes. Subclasses may
     // assume that they are the only selected item in |list| when this is
     // called. This could be called before CreateItemView so subclasses should
     // be aware that their views might not exist yet.
     virtual void SelectedStateChanged() = 0;
 
     // Creates an image of a large checkmark, used to indicate that an option is
     // selected.
     std::unique_ptr<views::ImageView> CreateCheckmark(bool selected);
 
+    // Creates the view that represents this item's content. Typically this will
+    // be a label describing the payment method, shipping adress, etc.
+    virtual std::unique_ptr<views::View> CreateContentView() = 0;
+
+    // Creates the view that should be displayed after the checkmark in the
+    // item's view, such as the credit card icon.
+    virtual std::unique_ptr<views::View> CreateExtraView();
+
+    // Returns whether this item is complete/valid and can be selected by the
+    // user. If this returns false when the user attempts to select this item,
+    // PerformSelectionFallback will be called instead.
+    virtual bool CanBeSelected() const = 0;
+
+    // Performs the action that replaces selection when CanBeSelected returns
+    // false. This will usually be to display an editor.
+    virtual void PerformSelectionFallback() = 0;
+
    private:
+    // Creates and returns the view associated with this list item.
+    std::unique_ptr<views::View> CreateItemView();
+
     // views::ButtonListener:
-    void ButtonPressed(views::Button* sender, const ui::Event& event) override {
-    }
+    void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
     std::unique_ptr<views::View> item_view_;
     PaymentRequestSpec* spec_;
     PaymentRequestState* state_;
     PaymentRequestItemList* list_;
+    std::unique_ptr<views::ImageView> checkmark_;
     bool selected_;
 
     DISALLOW_COPY_AND_ASSIGN(Item);
   };
 
   PaymentRequestItemList();
   virtual ~PaymentRequestItemList();
 
   // Adds an item to this list. |item->list()| should return this object.
   void AddItem(std::unique_ptr<Item> item);
@@ skipping 14 matching lines @@
 
   std::vector<std::unique_ptr<Item>> items_;
   Item* selected_item_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestItemList);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_ITEM_LIST_H_