FTXUI  5.0.0
C++ functional terminal UI.
reflect.cpp
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1// Copyright 2020 Arthur Sonzogni. All rights reserved.
2// Use of this source code is governed by the MIT license that can be found in
3// the LICENSE file.
4#include <memory> // for make_shared, __shared_ptr_access
5#include <utility> // for move
6#include <vector> // for __alloc_traits<>::value_type
7
8#include "ftxui/dom/elements.hpp" // for Element, unpack, Decorator, reflect
9#include "ftxui/dom/node.hpp" // for Node, Elements
10#include "ftxui/dom/requirement.hpp" // for Requirement
11#include "ftxui/screen/box.hpp" // for Box
12#include "ftxui/screen/screen.hpp" // for Screen
13
14namespace ftxui {
15namespace {
16
17// Helper class.
18class Reflect : public Node {
19 public:
20 Reflect(Element child, Box& box)
21 : Node(unpack(std::move(child))), reflected_box_(box) {}
22
23 void ComputeRequirement() final {
25 requirement_ = children_[0]->requirement();
26 }
27
28 void SetBox(Box box) final {
29 reflected_box_ = box;
30 Node::SetBox(box);
31 children_[0]->SetBox(box);
32 }
33
34 void Render(Screen& screen) final {
35 reflected_box_ = Box::Intersection(screen.stencil, reflected_box_);
36 return Node::Render(screen);
37 }
38
39 private:
40 Box& reflected_box_;
41};
42} // namespace
43
45 return [&](Element child) -> Element {
46 return std::make_shared<Reflect>(std::move(child), box);
47 };
48}
49
50} // namespace ftxui
virtual void SetBox(Box box)
Assign a position and a dimension to an element for drawing.
Definition: node.cpp:26
virtual void ComputeRequirement()
Compute how much space an elements needs.
Definition: node.cpp:18
virtual void Render(Screen &screen)
Display an element on a ftxui::Screen.
Definition: node.cpp:32
std::function< Element(Element)> Decorator
Definition: elements.hpp:25
std::shared_ptr< Node > Element
Definition: elements.hpp:23
Decorator reflect(Box &box)
Definition: reflect.cpp:44
void Render(Screen &screen, const Element &element)
Display an element on a ftxui::Screen.
Definition: node.cpp:47
static auto Intersection(Box a, Box b) -> Box
Definition: box.cpp:12