terminal_posix.cc | Explore in Territory

// Copyright 2024 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// GEN_BUILD:CONDITION(tint_build_is_linux || tint_build_is_mac)

#include <unistd.h>

#include <sys/select.h>
#include <termios.h>
#include <chrono>
#include <cstdint>
#include <cstdio>
#include <cstring>
#include <optional>
#include <string_view>
#include <utility>

#include "src/tint/utils/containers/vector.h"
#include "src/tint/utils/macros/compiler.h"
#include "src/tint/utils/macros/defer.h"
#include "src/tint/utils/system/env.h"
#include "src/tint/utils/system/terminal.h"

namespace tint {
namespace {

std::optional<bool> TerminalIsDarkImpl(FILE* out) { … }

}  // namespace

bool TerminalSupportsColors(FILE* f) { … }

/// Probes the terminal using a Device Control escape sequence to get the background color.
/// @see https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Device-Control-functions
std::optional<bool> TerminalIsDark(FILE* out) { … }

}  // namespace tint
chromium/third_party/dawn/src/tint/utils/system/terminal_posix.cc
