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https://github.com/ArthurSonzogni/FTXUI.git
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6039474a26
Add the `automerge` attribute to the Pixel bit field. It controls whether two pixels must be automerged. Defining this allows two mergeable characters not to be merged. This was requested by: https://github.com/ArthurSonzogni/FTXUI/issues/285
389 lines
10 KiB
C++
389 lines
10 KiB
C++
#include <algorithm> // for max
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#include <iterator> // for begin, end
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#include <memory> // for allocator, make_shared, __shared_ptr_access
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#include <string> // for string, basic_string
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#include <utility> // for move
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#include <vector> // for vector, __alloc_traits<>::value_type
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#include "ftxui/dom/elements.hpp" // for unpack, Element, Decorator, BorderStyle, ROUNDED, Elements, DOUBLE, EMPTY, HEAVY, LIGHT, border, borderDouble, borderEmpty, borderHeavy, borderLight, borderRounded, borderStyled, borderWith, window
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#include "ftxui/dom/node.hpp" // for Node, Elements
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#include "ftxui/dom/requirement.hpp" // for Requirement
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#include "ftxui/screen/box.hpp" // for Box
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#include "ftxui/screen/screen.hpp" // for Pixel, Screen
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namespace ftxui {
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static std::string simple_border_charset[6][6] = {
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{"┌", "┐", "└", "┘", "─", "│"}, //
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{"┏", "┓", "┗", "┛", "━", "┃"}, //
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{"╔", "╗", "╚", "╝", "═", "║"}, //
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{"╭", "╮", "╰", "╯", "─", "│"}, //
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{" ", " ", " ", " ", " ", " "}, //
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};
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// For reference, here is the charset for normal border:
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// {"┌", "┐", "└", "┘", "─", "│", "┬", "┴", "┤", "├"};
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// TODO(arthursonzogni): Consider adding options to choose the kind of borders
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// to use.
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class Border : public Node {
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public:
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Border(Elements children, BorderStyle style)
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: Node(std::move(children)),
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charset(std::begin(simple_border_charset[style]),
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std::end(simple_border_charset[style])) {}
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Border(Elements children, Pixel pixel)
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: Node(std::move(children)), charset_pixel(10, pixel) {}
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std::vector<Pixel> charset_pixel;
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std::vector<std::string> charset;
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void ComputeRequirement() override {
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Node::ComputeRequirement();
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requirement_ = children_[0]->requirement();
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requirement_.min_x += 2;
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requirement_.min_y += 2;
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if (children_.size() == 2) {
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requirement_.min_x =
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std::max(requirement_.min_x, children_[1]->requirement().min_x + 2);
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}
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requirement_.selected_box.x_min++;
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requirement_.selected_box.x_max++;
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requirement_.selected_box.y_min++;
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requirement_.selected_box.y_max++;
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}
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void SetBox(Box box) override {
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Node::SetBox(box);
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if (children_.size() == 2) {
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Box title_box;
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title_box.x_min = box.x_min + 1;
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title_box.x_max = box.x_max - 1;
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title_box.y_min = box.y_min;
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title_box.y_max = box.y_min;
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children_[1]->SetBox(title_box);
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}
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box.x_min++;
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box.x_max--;
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box.y_min++;
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box.y_max--;
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children_[0]->SetBox(box);
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}
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void Render(Screen& screen) override {
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// Draw content.
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children_[0]->Render(screen);
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// Draw the border.
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if (box_.x_min >= box_.x_max || box_.y_min >= box_.y_max)
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return;
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if (!charset.empty())
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RenderPixel(screen);
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else
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RenderChar(screen);
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}
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void RenderPixel(Screen& screen) {
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screen.at(box_.x_min, box_.y_min) = charset[0];
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screen.at(box_.x_max, box_.y_min) = charset[1];
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screen.at(box_.x_min, box_.y_max) = charset[2];
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screen.at(box_.x_max, box_.y_max) = charset[3];
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for (float x = box_.x_min + 1; x < box_.x_max; ++x) {
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Pixel& p1 = screen.PixelAt(x, box_.y_min);
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Pixel& p2 = screen.PixelAt(x, box_.y_max);
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p1.character = charset[4];
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p2.character = charset[4];
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p1.automerge = true;
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p2.automerge = true;
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}
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for (float y = box_.y_min + 1; y < box_.y_max; ++y) {
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Pixel& p3 = screen.PixelAt(box_.x_min, y);
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Pixel& p4 = screen.PixelAt(box_.x_max, y);
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p3.character = charset[5];
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p4.character = charset[5];
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p3.automerge = true;
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p4.automerge = true;
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}
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// Draw title.
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if (children_.size() == 2)
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children_[1]->Render(screen);
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}
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void RenderChar(Screen& screen) {
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screen.PixelAt(box_.x_min, box_.y_min) = charset_pixel[0];
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screen.PixelAt(box_.x_max, box_.y_min) = charset_pixel[1];
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screen.PixelAt(box_.x_min, box_.y_max) = charset_pixel[2];
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screen.PixelAt(box_.x_max, box_.y_max) = charset_pixel[3];
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for (float x = box_.x_min + 1; x < box_.x_max; ++x) {
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Pixel& p1 = screen.PixelAt(x, box_.y_min);
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Pixel& p2 = screen.PixelAt(x, box_.y_max);
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p1 = charset_pixel[5];
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p2 = charset_pixel[5];
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p1.automerge = true;
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p2.automerge = true;
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}
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for (float y = box_.y_min + 1; y < box_.y_max; ++y) {
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Pixel& p3 = screen.PixelAt(box_.x_min, y);
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Pixel& p4 = screen.PixelAt(box_.x_max, y);
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p3 = charset_pixel[5];
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p4 = charset_pixel[5];
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p3.automerge = true;
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p4.automerge = true;
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}
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}
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};
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/// @brief Draw a border around the element.
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/// @ingroup dom
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/// @see border
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/// @see borderLight
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/// @see borderDouble
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/// @see borderHeavy
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/// @see borderEmpty
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/// @see borderRounded
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///
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/// Add a border around an element
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///
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/// ### Example
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///
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/// ```cpp
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/// // Use 'border' as a function...
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/// Element document = border(text("The element"));
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///
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/// // ...Or as a 'pipe'.
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/// Element document = text("The element") | border;
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/// ```
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///
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/// ### Output
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///
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/// ```bash
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/// ┌───────────┐
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/// │The element│
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/// └───────────┘
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/// ```
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Element border(Element child) {
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return std::make_shared<Border>(unpack(std::move(child)), ROUNDED);
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}
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/// @brief Same as border but with a constant Pixel around the element.
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/// @ingroup dom
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/// @see border
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Decorator borderWith(Pixel pixel) {
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return [pixel](Element child) {
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return std::make_shared<Border>(unpack(std::move(child)), pixel);
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};
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}
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/// @brief Same as border but with different styles.
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/// @ingroup dom
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/// @see border
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Decorator borderStyled(BorderStyle style) {
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return [style](Element child) {
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return std::make_shared<Border>(unpack(std::move(child)), style);
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};
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}
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/// @brief Draw a light border around the element.
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/// @ingroup dom
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/// @see border
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/// @see borderLight
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/// @see borderDouble
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/// @see borderHeavy
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/// @see borderRounded
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/// @see borderEmpty
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/// @see borderStyled
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/// @see borderWith
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///
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/// Add a border around an element
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///
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/// ### Example
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///
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/// ```cpp
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/// // Use 'borderLight' as a function...
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/// Element document = borderLight(text("The element"));
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///
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/// // ...Or as a 'pipe'.
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/// Element document = text("The element") | borderLight;
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/// ```
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///
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/// ### Output
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///
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/// ```bash
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/// ┌──────────────┐
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/// │The element │
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/// └──────────────┘
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/// ```
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Element borderLight(Element child) {
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return std::make_shared<Border>(unpack(std::move(child)), LIGHT);
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}
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/// @brief Draw a heavy border around the element.
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/// @ingroup dom
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/// @see border
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/// @see borderLight
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/// @see borderDouble
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/// @see borderHeavy
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/// @see borderRounded
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/// @see borderEmpty
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/// @see borderStyled
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/// @see borderWith
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///
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/// Add a border around an element
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///
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/// ### Example
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///
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/// ```cpp
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/// // Use 'borderHeavy' as a function...
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/// Element document = borderHeavy(text("The element"));
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///
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/// // ...Or as a 'pipe'.
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/// Element document = text("The element") | borderHeavy;
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/// ```
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///
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/// ### Output
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///
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/// ```bash
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/// ┏━━━━━━━━━━━━━━┓
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/// ┃The element ┃
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/// ┗━━━━━━━━━━━━━━┛
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/// ```
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Element borderHeavy(Element child) {
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return std::make_shared<Border>(unpack(std::move(child)), HEAVY);
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}
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/// @brief Draw a double border around the element.
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/// @ingroup dom
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/// @see border
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/// @see borderLight
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/// @see borderDouble
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/// @see borderHeavy
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/// @see borderRounded
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/// @see borderEmpty
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/// @see borderStyled
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/// @see borderWith
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///
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/// Add a border around an element
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///
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/// ### Example
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///
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/// ```cpp
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/// // Use 'borderDouble' as a function...
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/// Element document = borderDouble(text("The element"));
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///
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/// // ...Or as a 'pipe'.
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/// Element document = text("The element") | borderDouble;
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/// ```
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///
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/// ### Output
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///
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/// ```bash
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/// ╔══════════════╗
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/// ║The element ║
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/// ╚══════════════╝
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/// ```
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Element borderDouble(Element child) {
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return std::make_shared<Border>(unpack(std::move(child)), DOUBLE);
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}
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/// @brief Draw a rounded border around the element.
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/// @ingroup dom
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/// @see border
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/// @see borderLight
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/// @see borderDouble
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/// @see borderHeavy
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/// @see borderRounded
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/// @see borderEmpty
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/// @see borderStyled
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/// @see borderWith
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///
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/// Add a border around an element
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///
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/// ### Example
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///
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/// ```cpp
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/// // Use 'borderRounded' as a function...
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/// Element document = borderRounded(text("The element"));
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///
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/// // ...Or as a 'pipe'.
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/// Element document = text("The element") | borderRounded;
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/// ```
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///
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/// ### Output
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///
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/// ```bash
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/// ╭──────────────╮
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/// │The element │
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/// ╰──────────────╯
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/// ```
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Element borderRounded(Element child) {
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return std::make_shared<Border>(unpack(std::move(child)), ROUNDED);
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}
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/// @brief Draw an empty border around the element.
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/// @ingroup dom
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/// @see border
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/// @see borderLight
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/// @see borderDouble
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/// @see borderHeavy
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/// @see borderRounded
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/// @see borderEmpty
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/// @see borderStyled
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/// @see borderWith
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///
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/// Add a border around an element
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///
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/// ### Example
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///
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/// ```cpp
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/// // Use 'borderRounded' as a function...
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/// Element document = borderRounded(text("The element"));
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///
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/// // ...Or as a 'pipe'.
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/// Element document = text("The element") | borderRounded;
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/// ```
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///
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/// ### Output
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///
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/// ```bash
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///
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/// The element
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///
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/// ```
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Element borderEmpty(Element child) {
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return std::make_shared<Border>(unpack(std::move(child)), EMPTY);
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}
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/// @brief Draw window with a title and a border around the element.
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/// @param title The title of the window.
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/// @param content The element to be wrapped.
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/// @ingroup dom
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/// @see border
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///
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/// ### Example
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///
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/// ```cpp
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/// Element document = window(text("Title"),
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/// text("content")
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/// );
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/// ```
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///
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/// ### Output
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///
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/// ```bash
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/// ┌Title──┐
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/// │content│
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/// └───────┘
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/// ```
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Element window(Element title, Element content) {
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return std::make_shared<Border>(unpack(std::move(content), std::move(title)),
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ROUNDED);
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}
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} // namespace ftxui
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// Copyright 2020 Arthur Sonzogni. All rights reserved.
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// Use of this source code is governed by the MIT license that can be found in
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// the LICENSE file.
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