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https://github.com/dart-lang/sdk
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b3093ecee6
On Windows, some Windows 10 builds support only ANSI output, but not input, so these need to be separated. I'm also improving the detection on Mac and Linux to avoid hardcoding the result. Instead, supportsAnsiEscapes will be true if isatty() and the TERM environment variable contains the string 'xterm'. related #28614 R=lrn@google.com Review-Url: https://codereview.chromium.org/2753233002 .
124 lines
2.7 KiB
C++
124 lines
2.7 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#if !defined(DART_IO_DISABLED)
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#include "platform/globals.h"
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#if defined(HOST_OS_LINUX)
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#include "bin/stdio.h"
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#include <errno.h> // NOLINT
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#include <sys/ioctl.h> // NOLINT
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#include <termios.h> // NOLINT
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#include "bin/fdutils.h"
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#include "platform/signal_blocker.h"
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namespace dart {
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namespace bin {
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bool Stdin::ReadByte(int* byte) {
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int c = NO_RETRY_EXPECTED(getchar());
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if ((c == EOF) && (errno != 0)) {
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return false;
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}
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*byte = (c == EOF) ? -1 : c;
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return true;
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}
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bool Stdin::GetEchoMode(bool* enabled) {
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struct termios term;
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int status = NO_RETRY_EXPECTED(tcgetattr(STDIN_FILENO, &term));
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if (status != 0) {
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return false;
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}
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*enabled = ((term.c_lflag & ECHO) != 0);
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return true;
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}
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bool Stdin::SetEchoMode(bool enabled) {
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struct termios term;
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int status = NO_RETRY_EXPECTED(tcgetattr(STDIN_FILENO, &term));
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if (status != 0) {
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return false;
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}
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if (enabled) {
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term.c_lflag |= (ECHO | ECHONL);
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} else {
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term.c_lflag &= ~(ECHO | ECHONL);
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}
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status = NO_RETRY_EXPECTED(tcsetattr(STDIN_FILENO, TCSANOW, &term));
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return (status == 0);
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}
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bool Stdin::GetLineMode(bool* enabled) {
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struct termios term;
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int status = NO_RETRY_EXPECTED(tcgetattr(STDIN_FILENO, &term));
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if (status != 0) {
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return false;
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}
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*enabled = ((term.c_lflag & ICANON) != 0);
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return true;
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}
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bool Stdin::SetLineMode(bool enabled) {
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struct termios term;
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int status = NO_RETRY_EXPECTED(tcgetattr(STDIN_FILENO, &term));
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if (status != 0) {
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return false;
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}
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if (enabled) {
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term.c_lflag |= ICANON;
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} else {
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term.c_lflag &= ~(ICANON);
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}
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status = NO_RETRY_EXPECTED(tcsetattr(STDIN_FILENO, TCSANOW, &term));
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return (status == 0);
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}
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static bool TermHasXTerm() {
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const char* term = getenv("TERM");
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if (term == NULL) {
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return false;
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}
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return strstr(term, "xterm") != NULL;
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}
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bool Stdin::AnsiSupported(bool* supported) {
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*supported = isatty(STDIN_FILENO) && TermHasXTerm();
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return true;
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}
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bool Stdout::GetTerminalSize(intptr_t fd, int size[2]) {
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struct winsize w;
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int status = NO_RETRY_EXPECTED(ioctl(fd, TIOCGWINSZ, &w));
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if ((status == 0) && ((w.ws_col != 0) || (w.ws_row != 0))) {
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size[0] = w.ws_col;
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size[1] = w.ws_row;
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return true;
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}
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return false;
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}
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bool Stdout::AnsiSupported(intptr_t fd, bool* supported) {
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*supported = isatty(fd) && TermHasXTerm();
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return true;
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}
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} // namespace bin
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} // namespace dart
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#endif // defined(HOST_OS_LINUX)
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#endif // !defined(DART_IO_DISABLED)
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