mirror of
https://github.com/ArthurSonzogni/FTXUI.git
synced 2025-05-06 17:21:13 +08:00
0b57be9c49
Fixed wrong parameter documentation name. Taken out of: https://github.com/ArthurSonzogni/FTXUI/pull/600 Co-authored-by: LostInCompilation <12819635+LostInCompilation@users.noreply.github.com>
90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
#include <functional> // for function
|
|
#include <memory> // for make_unique, __shared_ptr_access, __shared_ptr_access<>::element_type, shared_ptr
|
|
#include <type_traits> // for remove_reference, remove_reference<>::type
|
|
#include <utility> // for move
|
|
|
|
#include "ftxui/component/component.hpp" // for ComponentDecorator, Maybe, Make
|
|
#include "ftxui/component/component_base.hpp" // for Component, ComponentBase
|
|
#include "ftxui/component/event.hpp" // for Event
|
|
#include "ftxui/dom/elements.hpp" // for Element
|
|
#include "ftxui/dom/node.hpp" // for Node
|
|
|
|
namespace ftxui {
|
|
|
|
Component Maybe(Component child, std::function<bool()> show) {
|
|
class Impl : public ComponentBase {
|
|
public:
|
|
explicit Impl(std::function<bool()> show) : show_(std::move(show)) {}
|
|
|
|
private:
|
|
Element Render() override {
|
|
return show_() ? ComponentBase::Render() : std::make_unique<Node>();
|
|
}
|
|
bool Focusable() const override {
|
|
return show_() && ComponentBase::Focusable();
|
|
}
|
|
bool OnEvent(Event event) override {
|
|
return show_() && ComponentBase::OnEvent(event);
|
|
}
|
|
|
|
std::function<bool()> show_;
|
|
};
|
|
|
|
auto maybe = Make<Impl>(std::move(show));
|
|
maybe->Add(std::move(child));
|
|
return maybe;
|
|
}
|
|
|
|
/// @brief Decorate a component. It is shown only when the |show| function
|
|
/// returns true.
|
|
/// @param show a function returning whether the decoratorated component should
|
|
/// be shown.
|
|
/// @ingroup component
|
|
///
|
|
/// ### Example
|
|
///
|
|
/// ```cpp
|
|
/// auto component = Renderer([]{ return text("Hello World!"); });
|
|
/// auto maybe_component = component | Maybe([&]{ return counter == 42; });
|
|
/// ```
|
|
ComponentDecorator Maybe(std::function<bool()> show) {
|
|
return [show = std::move(show)](Component child) mutable {
|
|
return Maybe(std::move(child), std::move(show));
|
|
};
|
|
}
|
|
|
|
/// @brief Decorate a component |child|. It is shown only when |show| is true.
|
|
/// @param child the compoennt to decorate.
|
|
/// @param show a boolean. |child| is shown when |show| is true.
|
|
/// @ingroup component
|
|
///
|
|
/// ### Example
|
|
///
|
|
/// ```cpp
|
|
/// auto component = Renderer([]{ return text("Hello World!"); });
|
|
/// auto maybe_component = Maybe(component, &show);
|
|
/// ```
|
|
Component Maybe(Component child, const bool* show) {
|
|
return Maybe(std::move(child), [show] { return *show; });
|
|
}
|
|
|
|
/// @brief Decorate a component. It is shown only when |show| is true.
|
|
/// @param show a boolean. |child| is shown when |show| is true.
|
|
/// @ingroup component
|
|
///
|
|
/// ### Example
|
|
///
|
|
/// ```cpp
|
|
/// auto component = Renderer([]{ return text("Hello World!"); });
|
|
/// auto maybe_component = component | Maybe(&show);
|
|
/// ```
|
|
ComponentDecorator Maybe(const bool* show) {
|
|
return [show](Component child) { return Maybe(std::move(child), show); };
|
|
}
|
|
|
|
} // namespace ftxui
|
|
|
|
// Copyright 2021 Arthur Sonzogni. All rights reserved.
|
|
// Use of this source code is governed by the MIT license that can be found in
|
|
// the LICENSE file.
|