mirror of
https://github.com/ArthurSonzogni/FTXUI.git
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129 lines
3.5 KiB
C++
129 lines
3.5 KiB
C++
// 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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#include <memory> // for make_shared
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#include <utility> // for move
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#include "ftxui/dom/elements.hpp" // for Element, Decorator, bgcolor, color
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#include "ftxui/dom/node_decorator.hpp" // for NodeDecorator
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#include "ftxui/screen/box.hpp" // for Box
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#include "ftxui/screen/color.hpp" // for Color
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#include "ftxui/screen/screen.hpp" // for Pixel, Screen
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namespace ftxui {
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namespace {
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class BgColor : public NodeDecorator {
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public:
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BgColor(Element child, Color color)
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: NodeDecorator(std::move(child)), color_(color) {}
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void Render(Screen& screen) override {
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if (color_.IsOpaque()) {
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for (int y = box_.y_min; y <= box_.y_max; ++y) {
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for (int x = box_.x_min; x <= box_.x_max; ++x) {
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screen.PixelAt(x, y).background_color = color_;
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}
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}
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} else {
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for (int y = box_.y_min; y <= box_.y_max; ++y) {
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for (int x = box_.x_min; x <= box_.x_max; ++x) {
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Color& color = screen.PixelAt(x, y).background_color;
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color = Color::Blend(color, color_);
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}
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}
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}
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NodeDecorator::Render(screen);
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}
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Color color_;
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};
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class FgColor : public NodeDecorator {
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public:
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FgColor(Element child, Color color)
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: NodeDecorator(std::move(child)), color_(color) {}
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void Render(Screen& screen) override {
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if (color_.IsOpaque()) {
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for (int y = box_.y_min; y <= box_.y_max; ++y) {
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for (int x = box_.x_min; x <= box_.x_max; ++x) {
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screen.PixelAt(x, y).foreground_color = color_;
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}
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}
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} else {
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for (int y = box_.y_min; y <= box_.y_max; ++y) {
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for (int x = box_.x_min; x <= box_.x_max; ++x) {
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Color& color = screen.PixelAt(x, y).foreground_color;
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color = Color::Blend(color, color_);
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}
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}
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}
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NodeDecorator::Render(screen);
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}
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Color color_;
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};
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} // namespace
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/// @brief Set the foreground color of an element.
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/// @param color The color of the output element.
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/// @param child The input element.
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/// @return The output element colored.
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/// @ingroup dom
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///
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/// ### Example
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///
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/// ```cpp
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/// Element document = color(Color::Green, text("Success")),
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/// ```
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Element color(Color color, Element child) {
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return std::make_shared<FgColor>(std::move(child), color);
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}
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/// @brief Set the background color of an element.
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/// @param color The color of the output element.
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/// @param child The input element.
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/// @return The output element colored.
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/// @ingroup dom
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///
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/// ### Example
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///
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/// ```cpp
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/// Element document = bgcolor(Color::Green, text("Success")),
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/// ```
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Element bgcolor(Color color, Element child) {
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return std::make_shared<BgColor>(std::move(child), color);
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}
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/// @brief Decorate using a foreground color.
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/// @param c The foreground color to be applied.
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/// @return The Decorator applying the color.
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/// @ingroup dom
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///
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/// ### Example
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///
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/// ```cpp
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/// Element document = text("red") | color(Color::Red);
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/// ```
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Decorator color(Color c) {
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return [c](Element child) { return color(c, std::move(child)); };
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}
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/// @brief Decorate using a background color.
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/// @param color The background color to be applied.
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/// @return The Decorator applying the color.
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/// @ingroup dom
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///
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/// ### Example
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///
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/// ```cpp
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/// Element document = text("red") | bgcolor(Color::Red);
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/// ```
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Decorator bgcolor(Color color) {
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return [color](Element child) { return bgcolor(color, std::move(child)); };
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}
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} // namespace ftxui
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