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// Copyright 2017 The Chromium Authors
// 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_VALIDATION_DELEGATE_H_
#define CHROME_BROWSER_UI_VIEWS_PAYMENTS_VALIDATION_DELEGATE_H_
#include <string>
#include <string_view>
namespace views {
class Textfield;
} // namespace views
namespace payments {
class ValidatingCombobox;
// Handles text field validation and formatting.
class ValidationDelegate {
public:
virtual ~ValidationDelegate();
virtual bool ShouldFormat();
virtual std::u16string Format(std::u16string_view text);
// Only the delegate knows how to validate the input fields.
virtual bool IsValidTextfield(views::Textfield* textfield,
std::u16string* error_message) = 0;
virtual bool IsValidCombobox(ValidatingCombobox* combobox,
std::u16string* error_message) = 0;
// Notifications to let delegate react to input field changes and also let
// caller know if the new values are valid. |was_blurred| indicates if the
// field has yet to be blurred once by the user.
virtual bool TextfieldValueChanged(views::Textfield* textfield,
bool was_blurred) = 0;
virtual bool ComboboxValueChanged(ValidatingCombobox* combobox) = 0;
// Lets the delegate know that the model of the combobox has changed, e.g.,
// when it gets filled asynchronously as for the state field.
virtual void ComboboxModelChanged(ValidatingCombobox* combobox) = 0;
};
} // namespace payments
#endif // CHROME_BROWSER_UI_VIEWS_PAYMENTS_VALIDATION_DELEGATE_H_
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