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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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83
src/ftxui/dom/paragraph.cpp
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@@ -1,38 +1,71 @@
#include <sstream> // for basic_istream, wstringstream
#include <string> // for allocator, char_traits, getline, operator+, wstring, basic_string
#include <sstream> // for basic_istream, stringstream
#include <string> // for string, allocator, getline
#include <utility> // for move
#include "ftxui/dom/deprecated.hpp" // for text, paragraph
#include "ftxui/dom/elements.hpp" // for Elements
#include "ftxui/dom/elements.hpp" // for flexbox, Element, text, Elements, operator|, xflex, paragraph, paragraphAlignCenter, paragraphAlignJustify, paragraphAlignLeft, paragraphAlignRight
#include "ftxui/dom/flexbox_config.hpp" // for FlexboxConfig, FlexboxConfig::JustifyContent, FlexboxConfig::JustifyContent::Center, FlexboxConfig::JustifyContent::FlexEnd, FlexboxConfig::JustifyContent::SpaceBetween
namespace ftxui {
/// @brief Return a vector of ftxui::text for every word of the string. This is
/// useful combined with ftxui::hflow.
/// @param the_text The string to be splitted.
/// @ingroup dom
/// @see hflow.
Elements paragraph(std::wstring the_text) {
Elements output;
std::wstringstream ss(the_text);
std::wstring word;
while (std::getline(ss, word, L' '))
output.push_back(text(word + L' '));
return output;
}
/// @brief Return a vector of ftxui::text for every word of the string. This is
/// useful combined with ftxui::hflow.
/// @param the_text The string to be splitted.
/// @ingroup dom
/// @see hflow.
Elements paragraph(std::string the_text) {
namespace {
Elements Split(std::string the_text) {
Elements output;
std::stringstream ss(the_text);
std::string word;
while (std::getline(ss, word, ' '))
output.push_back(text(word + ' '));
output.push_back(text(word));
return output;
}
} // namespace
/// @brief Return an element drawing the paragraph on multiple lines.
/// @ingroup dom
/// @see flexbox.
Element paragraph(std::string the_text) {
return paragraphAlignLeft(std::move(the_text));
}
/// @brief Return an element drawing the paragraph on multiple lines, aligned on
/// the left.
/// @ingroup dom
/// @see flexbox.
Element paragraphAlignLeft(std::string the_text) {
static const auto config = FlexboxConfig().SetGap(1, 0);
return flexbox(Split(std::move(the_text)), config);
}
/// @brief Return an element drawing the paragraph on multiple lines, aligned on
/// the right.
/// @ingroup dom
/// @see flexbox.
Element paragraphAlignRight(std::string the_text) {
static const auto config =
FlexboxConfig().SetGap(1, 0).Set(FlexboxConfig::JustifyContent::FlexEnd);
return flexbox(Split(std::move(the_text)), config);
}
/// @brief Return an element drawing the paragraph on multiple lines, aligned on
/// the center.
/// @ingroup dom
/// @see flexbox.
Element paragraphAlignCenter(std::string the_text) {
static const auto config =
FlexboxConfig().SetGap(1, 0).Set(FlexboxConfig::JustifyContent::Center);
return flexbox(Split(std::move(the_text)), config);
}
/// @brief Return an element drawing the paragraph on multiple lines, aligned
/// using a justified alignment.
/// the center.
/// @ingroup dom
/// @see flexbox.
Element paragraphAlignJustify(std::string the_text) {
static const auto config = FlexboxConfig().SetGap(1, 0).Set(
FlexboxConfig::JustifyContent::SpaceBetween);
Elements words = Split(std::move(the_text));
words.push_back(text("") | xflex);
return flexbox(std::move(words), config);
}
} // namespace ftxui