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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_ASSISTANT_MODEL_UI_ASSISTANT_UI_ELEMENT_H_
#define ASH_ASSISTANT_MODEL_UI_ASSISTANT_UI_ELEMENT_H_
#include "base/component_export.h"
#include "base/functional/callback.h"
namespace ash {
// AssistantUiElementType ------------------------------------------------------
// Defines possible types of Assistant UI elements.
enum class AssistantUiElementType {
kCard, // See AssistantCardElement.
kError, // See AssistantErrorElement.
kText, // See AssistantTextElement.
};
// AssistantUiElement ----------------------------------------------------------
// Base class for a UI element that will be rendered inside of Assistant UI.
class COMPONENT_EXPORT(ASSISTANT_MODEL) AssistantUiElement {
public:
AssistantUiElement(const AssistantUiElement&) = delete;
AssistantUiElement& operator=(const AssistantUiElement&) = delete;
virtual ~AssistantUiElement();
bool operator==(const AssistantUiElement& other) const {
return this->Compare(other);
}
AssistantUiElementType type() const { return type_; }
// Invoke to being processing the UI element for rendering. The specified
// |callback| will be run upon completion. Note that we don't include the
// processing result in the callback, as in |AssistantResponse| we handle
// success/failure cases the same because failures will be skipped in view
// handling.
using ProcessingCallback = base::OnceCallback<void()>;
virtual void Process(ProcessingCallback callback);
protected:
explicit AssistantUiElement(AssistantUiElementType type);
private:
const AssistantUiElementType type_;
virtual bool Compare(const AssistantUiElement& other) const = 0;
};
} // namespace ash
#endif // ASH_ASSISTANT_MODEL_UI_ASSISTANT_UI_ELEMENT_H_
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