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https://github.com/ArthurSonzogni/FTXUI.git
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75482d82d4
This can happen for example in embedded linux, in case the application is started via serial terminal. Signed-off-by: Jarosław Pelczar <jarek@jpelczar.com> Co-authored-by: ArthurSonzogni <sonzogniarthur@gmail.com>
97 lines
2.4 KiB
C++
97 lines
2.4 KiB
C++
#include <cstdlib> // for getenv
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#include <string> // for string, allocator
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#include "ftxui/screen/terminal.hpp"
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#if defined(_WIN32)
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#define WIN32_LEAN_AND_MEAN
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#ifndef NOMINMAX
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#define NOMINMAX
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#endif
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#include <Windows.h>
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#else
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#include <sys/ioctl.h> // for winsize, ioctl, TIOCGWINSZ
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#include <unistd.h> // for STDOUT_FILENO
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#endif
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namespace ftxui {
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Dimensions Terminal::Size() {
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#if defined(__EMSCRIPTEN__)
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return Dimensions{140, 43};
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#elif defined(_WIN32)
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CONSOLE_SCREEN_BUFFER_INFO csbi;
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if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi)) {
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return Dimensions{csbi.srWindow.Right - csbi.srWindow.Left + 1,
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csbi.srWindow.Bottom - csbi.srWindow.Top + 1};
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}
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// The Microsoft default "cmd" returns errors above.
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return Dimensions{80, 80};
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#else
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winsize w{};
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ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
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if (w.ws_col == 0 || w.ws_row == 0) {
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return Dimensions{80, 25};
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}
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return Dimensions{w.ws_col, w.ws_row};
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#endif
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}
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namespace {
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const char* Safe(const char* c) {
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return c ? c : "";
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}
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bool Contains(const std::string& s, const char* key) {
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return s.find(key) != std::string::npos;
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}
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static bool cached = false;
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Terminal::Color cached_supported_color;
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Terminal::Color ComputeColorSupport() {
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#if defined(__EMSCRIPTEN__)
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return Terminal::Color::TrueColor;
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#endif
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std::string COLORTERM = Safe(std::getenv("COLORTERM"));
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if (Contains(COLORTERM, "24bit") || Contains(COLORTERM, "truecolor"))
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return Terminal::Color::TrueColor;
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std::string TERM = Safe(std::getenv("TERM"));
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if (Contains(COLORTERM, "256") || Contains(TERM, "256"))
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return Terminal::Color::Palette256;
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#if defined(FTXUI_MICROSOFT_TERMINAL_FALLBACK)
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// Microsoft terminals do not properly declare themselve supporting true
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// colors: https://github.com/microsoft/terminal/issues/1040
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// As a fallback, assume microsoft terminal are the ones not setting those
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// variables, and enable true colors.
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if (TERM == "" && COLORTERM == "")
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return Terminal::Color::TrueColor;
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#endif
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return Terminal::Color::Palette16;
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}
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} // namespace
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Terminal::Color Terminal::ColorSupport() {
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if (!cached) {
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cached = true;
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cached_supported_color = ComputeColorSupport();
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}
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return cached_supported_color;
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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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