[Payments] Add combobox support to editors.

chrome/browser/ui/views/payments/editor_view_controller.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_EDITOR_VIEW_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_EDITOR_VIEW_CONTROLLER_H_
 
 #include <memory>
 #include <unordered_map>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/ui/views/payments/payment_request_sheet_controller.h"
-#include "chrome/browser/ui/views/payments/validating_textfield.h"
+#include "chrome/browser/ui/views/payments/validation_delegate.h"
 #include "components/autofill/core/browser/field_types.h"
 #include "ui/views/controls/button/vector_icon_button_delegate.h"
+#include "ui/views/controls/combobox/combobox_listener.h"
 #include "ui/views/controls/textfield/textfield_controller.h"
 
+namespace ui {
+class ComboboxModel;
+}
+
 namespace views {
 class Textfield;
 class View;
 }  // namespace views
 
 namespace payments {
 
 class PaymentRequest;
 class PaymentRequestDialogView;
+class ValidatingTextfield;
 
 // Field definition for an editor field, used to build the UI.
 struct EditorField {
   enum class LengthHint : int { HINT_LONG, HINT_SHORT };
+  enum class ControlType : int { TEXTFIELD, COMBOBOX };
 
   EditorField(autofill::ServerFieldType type,
               const base::string16& label,
               LengthHint length_hint,
-              bool required)
+              bool required,
+              ControlType control_type = ControlType::TEXTFIELD)
       : type(type),
         label(label),
         length_hint(length_hint),
-        required(required) {}
+        required(required),
+        control_type(control_type) {}
 
   // Data type in the field.
   const autofill::ServerFieldType type;
   // Label to be shown alongside the field.
   const base::string16 label;
   // Hint about the length of this field's contents.
   LengthHint length_hint;
   // Whether the field is required.
   bool required;
+  // The control type.
+  ControlType control_type;
 };
 
 // The PaymentRequestSheetController subtype for the editor screens of the
 // Payment Request flow.
 class EditorViewController : public PaymentRequestSheetController,
-                             public views::TextfieldController {
+                             public views::TextfieldController,
+                             public views::ComboboxListener {
  public:
   using TextFieldsMap =
       std::unordered_map<ValidatingTextfield*, const EditorField>;
 
   // Does not take ownership of the arguments, which should outlive this object.
   EditorViewController(PaymentRequest* request,
                        PaymentRequestDialogView* dialog);
   ~EditorViewController() override;
 
   // PaymentRequestSheetController:
   std::unique_ptr<views::View> CreateView() override;
 
   // Returns the field definitions used to build the UI.
   virtual std::vector<EditorField> GetFieldDefinitions() = 0;
   // Validates the data entered and attempts to save; returns true on success.
   virtual bool ValidateModelAndSave() = 0;
-  // Creates a ValidatingTextfield::Delegate which knows how to validate for a
-  // given |field| definition.
-  virtual std::unique_ptr<ValidatingTextfield::Delegate>
-  CreateValidationDelegate(const EditorField& field) = 0;
+  // Creates a ValidationDelegate which knows how to validate for a given
+  // |field| definition.
+  virtual std::unique_ptr<ValidationDelegate> CreateValidationDelegate(
+      const EditorField& field) = 0;
+  virtual ui::ComboboxModel* GetComboboxModelForType(
+      const autofill::ServerFieldType& type) = 0;
 
   const TextFieldsMap& text_fields() const { return text_fields_; }
 
  protected:
   // PaymentRequestSheetController;
   std::unique_ptr<views::Button> CreatePrimaryButton() override;
 
  private:
   // PaymentRequestSheetController:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
-  // views::TextfieldController
+  // views::TextfieldController:
   void ContentsChanged(views::Textfield* sender,
                        const base::string16& new_contents) override;
 
+  // views::ComboboxListener:
+  void OnPerformAction(views::Combobox* combobox) override;
+
   // Creates a view for an input field to be added in the editor sheet. |field|
   // is the field definition, which contains the label and the hint about
   // the length of the input field.
   std::unique_ptr<views::View> CreateInputField(const EditorField& field);
 
   // Used to remember the association between the input field UI element and the
   // original field definition. The ValidatingTextfield* are owned by their
   // parent view, this only keeps a reference that is good as long as the
   // textfield is visible.
   TextFieldsMap text_fields_;
 
   DISALLOW_COPY_AND_ASSIGN(EditorViewController);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_EDITOR_VIEW_CONTROLLER_H_