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Implement flexbox (#277)

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This implement the flexbox elements, following the HTML one.

Built from them, there is also the following elements:
- `paragraph`
- `paragraphAlignLeft`
- `paragraphAlignRight`
- `paragraphAlignCenter`
- `paragraphAlignJustify`

This is a breaking change.
This commit is contained in:
Arthur Sonzogni
2021-12-11 17:58:25 +01:00
committed by GitHub
parent f7c6bf91a7
commit 602392c43d
70 changed files with 2163 additions and 300 deletions
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44
src/ftxui/dom/util.cpp
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@@ -1,12 +1,13 @@
#include <algorithm> // for min
#include <functional> // for function
#include <memory> // for __shared_ptr_access
#include <memory> // for __shared_ptr_access, make_unique
#include <utility> // for move
#include <vector> // for vector
#include "ftxui/dom/elements.hpp" // for Element, Decorator, Elements, operator|, Fit, nothing
#include "ftxui/dom/node.hpp" // for Node
#include "ftxui/dom/elements.hpp" // for Element, Decorator, Elements, operator|, Fit, emptyElement, nothing
#include "ftxui/dom/node.hpp" // for Node, Node::Status
#include "ftxui/dom/requirement.hpp" // for Requirement
#include "ftxui/screen/box.hpp" // for Box
#include "ftxui/screen/screen.hpp" // for Full
#include "ftxui/screen/terminal.hpp" // for Dimensions
@@ -69,10 +70,39 @@ Element operator|(Element element, Decorator decorator) {
/// @see Fixed
/// @see Full
Dimensions Dimension::Fit(Element& e) {
e->ComputeRequirement();
Dimensions size = Dimension::Full();
return {std::min(e->requirement().min_x, size.dimx),
std::min(e->requirement().min_y, size.dimy)};
Dimensions fullsize = Dimension::Full();
Box box;
box.x_min = 0;
box.y_min = 0;
box.x_max = fullsize.dimx;
box.y_max = fullsize.dimy;
Node::Status status;
e->Check(&status);
while (status.need_iteration && status.iteration < 20) {
e->ComputeRequirement();
// Don't give the element more space than it needs:
box.x_max = std::min(box.x_max, e->requirement().min_x);
box.y_max = std::min(box.y_max, e->requirement().min_y);
e->SetBox(box);
status.need_iteration = false;
status.iteration++;
e->Check(&status);
if (!status.need_iteration)
break;
// Increase the size of the box until it fits, but not more than the with of
// the terminal emulator:
box.x_max = std::min(e->requirement().min_x, fullsize.dimx);
box.y_max = std::min(e->requirement().min_y, fullsize.dimy);
}
return {
box.x_max,
box.y_max,
};
}
/// An element of size 0x0 drawing nothing.