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mpv/osdep/terminal-win.c

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/* Windows TermIO
*
* copyright (C) 2003 Sascha Sommer
*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <fcntl.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <windows.h>
#include <io.h>
#include <assert.h>
#include "common/common.h"
#include "input/keycodes.h"
#include "input/input.h"
#include "terminal.h"
#include "osdep/io.h"
#include "osdep/threads.h"
#include "osdep/w32_keyboard.h"
// https://docs.microsoft.com/en-us/windows/console/setconsolemode
// These values are effective on Windows 10 build 16257 (August 2017) or later
#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x0004
#endif
#ifndef DISABLE_NEWLINE_AUTO_RETURN
#define DISABLE_NEWLINE_AUTO_RETURN 0x0008
#endif
// Note: the DISABLE_NEWLINE_AUTO_RETURN docs say it enables delayed-wrap, but
// it's wrong. It does only what its names suggests - and we want it unset:
// https://github.com/microsoft/terminal/issues/4126#issuecomment-571418661
static void attempt_native_out_vt(HANDLE hOut, DWORD basemode)
{
DWORD vtmode = basemode | ENABLE_VIRTUAL_TERMINAL_PROCESSING;
vtmode &= ~DISABLE_NEWLINE_AUTO_RETURN;
if (!SetConsoleMode(hOut, vtmode))
SetConsoleMode(hOut, basemode);
}
static bool is_native_out_vt(HANDLE hOut)
{
DWORD cmode;
return GetConsoleMode(hOut, &cmode) &&
(cmode & ENABLE_VIRTUAL_TERMINAL_PROCESSING) &&
!(cmode & DISABLE_NEWLINE_AUTO_RETURN);
}
#define hSTDOUT GetStdHandle(STD_OUTPUT_HANDLE)
#define hSTDERR GetStdHandle(STD_ERROR_HANDLE)
#define FOREGROUND_ALL (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE)
#define BACKGROUND_ALL (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE)
static short stdoutAttrs = 0; // copied from the screen buffer on init
static const unsigned char ansi2win32[8] = {
0,
FOREGROUND_RED,
FOREGROUND_GREEN,
FOREGROUND_GREEN | FOREGROUND_RED,
FOREGROUND_BLUE,
FOREGROUND_BLUE | FOREGROUND_RED,
FOREGROUND_BLUE | FOREGROUND_GREEN,
FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED,
};
static const unsigned char ansi2win32bg[8] = {
0,
BACKGROUND_RED,
BACKGROUND_GREEN,
BACKGROUND_GREEN | BACKGROUND_RED,
BACKGROUND_BLUE,
BACKGROUND_BLUE | BACKGROUND_RED,
BACKGROUND_BLUE | BACKGROUND_GREEN,
BACKGROUND_BLUE | BACKGROUND_GREEN | BACKGROUND_RED,
};
static bool running;
static HANDLE death;
static mp_thread input_thread;
static struct input_ctx *input_ctx;
void terminal_get_size(int *w, int *h)
{
CONSOLE_SCREEN_BUFFER_INFO cinfo;
HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
if (GetConsoleScreenBufferInfo(hOut, &cinfo)) {
*w = cinfo.dwMaximumWindowSize.X - (is_native_out_vt(hOut) ? 0 : 1);
*h = cinfo.dwMaximumWindowSize.Y;
}
}
void terminal_get_size2(int *rows, int *cols, int *px_width, int *px_height)
{
}
static bool has_input_events(HANDLE h)
{
DWORD num_events;
if (!GetNumberOfConsoleInputEvents(h, &num_events))
return false;
return !!num_events;
}
static void read_input(HANDLE in)
{
// Process any input events in the buffer
while (has_input_events(in)) {
INPUT_RECORD event;
if (!ReadConsoleInputW(in, &event, 1, &(DWORD){0}))
break;
// Only key-down events are interesting to us
if (event.EventType != KEY_EVENT)
continue;
KEY_EVENT_RECORD *record = &event.Event.KeyEvent;
if (!record->bKeyDown)
continue;
UINT vkey = record->wVirtualKeyCode;
bool ext = record->dwControlKeyState & ENHANCED_KEY;
int mods = 0;
if (record->dwControlKeyState & (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
mods |= MP_KEY_MODIFIER_ALT;
if (record->dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
mods |= MP_KEY_MODIFIER_CTRL;
if (record->dwControlKeyState & SHIFT_PRESSED)
mods |= MP_KEY_MODIFIER_SHIFT;
int mpkey = mp_w32_vkey_to_mpkey(vkey, ext);
if (mpkey) {
mp_input_put_key(input_ctx, mpkey | mods);
} else {
// Only characters should be remaining
int c = record->uChar.UnicodeChar;
// The ctrl key always produces control characters in the console.
// Shift them back up to regular characters.
if (c > 0 && c < 0x20 && (mods & MP_KEY_MODIFIER_CTRL))
c += (mods & MP_KEY_MODIFIER_SHIFT) ? 0x40 : 0x60;
if (c >= 0x20)
mp_input_put_key(input_ctx, c | mods);
}
}
}
static MP_THREAD_VOID input_thread_fn(void *ptr)
{
mp_thread_set_name("terminal/input");
HANDLE in = ptr;
HANDLE stuff[2] = {in, death};
while (1) {
DWORD r = WaitForMultipleObjects(2, stuff, FALSE, INFINITE);
if (r != WAIT_OBJECT_0)
break;
read_input(in);
}
MP_THREAD_RETURN();
}
void terminal_setup_getch(struct input_ctx *ictx)
{
if (running)
return;
HANDLE in = GetStdHandle(STD_INPUT_HANDLE);
if (GetNumberOfConsoleInputEvents(in, &(DWORD){0})) {
input_ctx = ictx;
death = CreateEventW(NULL, TRUE, FALSE, NULL);
if (!death)
return;
if (mp_thread_create(&input_thread, input_thread_fn, in)) {
CloseHandle(death);
return;
}
running = true;
}
}
void terminal_uninit(void)
{
if (running) {
SetEvent(death);
mp_thread_join(input_thread);
input_ctx = NULL;
running = false;
}
}
bool terminal_in_background(void)
{
return false;
}
void mp_write_console_ansi(HANDLE wstream, char *buf)
{
wchar_t *wbuf = mp_from_utf8(NULL, buf);
wchar_t *pos = wbuf;
while (*pos) {
if (is_native_out_vt(wstream)) {
WriteConsoleW(wstream, pos, wcslen(pos), NULL, NULL);
break;
}
wchar_t *next = wcschr(pos, '\033');
if (!next) {
WriteConsoleW(wstream, pos, wcslen(pos), NULL, NULL);
break;
}
next[0] = '\0';
WriteConsoleW(wstream, pos, wcslen(pos), NULL, NULL);
if (next[1] == '[') {
// CSI - Control Sequence Introducer
next += 2;
// CSI codes generally follow this syntax:
// "\033[" [ <i> (';' <i> )* ] <c>
// where <i> are integers, and <c> a single char command code.
// Also see: http://en.wikipedia.org/wiki/ANSI_escape_code#CSI_codes
int params[16]; // 'm' might be unlimited; ignore that
int num_params = 0;
while (num_params < MP_ARRAY_SIZE(params)) {
wchar_t *end = next;
long p = wcstol(next, &end, 10);
if (end == next)
break;
next = end;
params[num_params++] = p;
if (next[0] != ';' || !next[0])
break;
next += 1;
}
wchar_t code = next[0];
if (code)
next += 1;
CONSOLE_SCREEN_BUFFER_INFO info;
GetConsoleScreenBufferInfo(wstream, &info);
switch (code) {
case 'K': { // erase to end of line
COORD at = info.dwCursorPosition;
int len = info.dwSize.X - at.X;
FillConsoleOutputCharacterW(wstream, ' ', len, at, &(DWORD){0});
SetConsoleCursorPosition(wstream, at);
break;
}
case 'A': { // cursor up
info.dwCursorPosition.Y -= 1;
SetConsoleCursorPosition(wstream, info.dwCursorPosition);
break;
}
case 'm': { // "SGR"
short attr = info.wAttributes;
if (num_params == 0) // reset
params[num_params++] = 0;
// we don't emulate italic, reverse/underline don't always work
for (int n = 0; n < num_params; n++) {
int p = params[n];
if (p == 0) {
attr = stdoutAttrs;
} else if (p == 1) {
attr |= FOREGROUND_INTENSITY;
} else if (p == 22) {
attr &= ~FOREGROUND_INTENSITY;
} else if (p == 4) {
attr |= COMMON_LVB_UNDERSCORE;
} else if (p == 24) {
attr &= ~COMMON_LVB_UNDERSCORE;
} else if (p == 7) {
attr |= COMMON_LVB_REVERSE_VIDEO;
} else if (p == 27) {
attr &= ~COMMON_LVB_REVERSE_VIDEO;
} else if (p >= 30 && p <= 37) {
attr &= ~FOREGROUND_ALL;
attr |= ansi2win32[p - 30];
} else if (p == 39) {
attr &= ~FOREGROUND_ALL;
attr |= stdoutAttrs & FOREGROUND_ALL;
} else if (p >= 40 && p <= 47) {
attr &= ~BACKGROUND_ALL;
attr |= ansi2win32bg[p - 40];
} else if (p == 49) {
attr &= ~BACKGROUND_ALL;
attr |= stdoutAttrs & BACKGROUND_ALL;
} else if (p == 38 || p == 48) { // ignore and skip sub-values
// 256 colors: <38/48>;5;N true colors: <38/48>;2;R;G;B
if (n+1 < num_params) {
n += params[n+1] == 5 ? 2
: params[n+1] == 2 ? 4
: num_params; /* unrecognized -> the rest */
}
}
}
if (attr != info.wAttributes)
SetConsoleTextAttribute(wstream, attr);
break;
}
}
} else if (next[1] == ']') {
// OSC - Operating System Commands
next += 2;
// OSC sequences generally follow this syntax:
// "\033]" <command> ST
// Where <command> is a string command
wchar_t *cmd = next;
while (next[0]) {
// BEL can be used instead of ST in xterm
if (next[0] == '\007' || next[0] == 0x9c) {
next[0] = '\0';
next += 1;
break;
}
if (next[0] == '\033' && next[1] == '\\') {
next[0] = '\0';
next += 2;
break;
}
next += 1;
}
// Handle xterm-style OSC commands
if (cmd[0] && cmd[1] == ';') {
wchar_t code = cmd[0];
wchar_t *param = cmd + 2;
switch (code) {
case '0': // Change Icon Name and Window Title
case '2': // Change Window Title
SetConsoleTitleW(param);
break;
}
}
} else {
WriteConsoleW(wstream, L"\033", 1, NULL, NULL);
}
pos = next;
}
talloc_free(wbuf);
}
static bool is_a_console(HANDLE h)
{
return GetConsoleMode(h, &(DWORD){0});
}
static void reopen_console_handle(DWORD std, int fd, FILE *stream)
{
HANDLE handle = GetStdHandle(std);
if (is_a_console(handle)) {
if (fd == 0) {
freopen("CONIN$", "rt", stream);
} else {
freopen("CONOUT$", "wt", stream);
}
setvbuf(stream, NULL, _IONBF, 0);
// Set the low-level FD to the new handle value, since mp_subprocess2
// callers might rely on low-level FDs being set. Note, with this
// method, fileno(stdin) != STDIN_FILENO, but that shouldn't matter.
int unbound_fd = -1;
if (fd == 0) {
unbound_fd = _open_osfhandle((intptr_t)handle, _O_RDONLY);
} else {
unbound_fd = _open_osfhandle((intptr_t)handle, _O_WRONLY);
}
// dup2 will duplicate the underlying handle. Don't close unbound_fd,
// since that will close the original handle.
dup2(unbound_fd, fd);
}
}
bool terminal_try_attach(void)
{
// mpv.exe is a flagged as a GUI application, but it acts as a console
// application when started from the console wrapper (see
// osdep/win32-console-wrapper.c). The console wrapper sets
// _started_from_console=yes, so check that variable before trying to
// attach to the console.
wchar_t console_env[4] = { 0 };
if (!GetEnvironmentVariableW(L"_started_from_console", console_env, 4))
return false;
if (wcsncmp(console_env, L"yes", 4))
return false;
SetEnvironmentVariableW(L"_started_from_console", NULL);
if (!AttachConsole(ATTACH_PARENT_PROCESS))
return false;
// We have a console window. Redirect input/output streams to that console's
// low-level handles, so things that use stdio work later on.
reopen_console_handle(STD_INPUT_HANDLE, STDIN_FILENO, stdin);
reopen_console_handle(STD_OUTPUT_HANDLE, STDOUT_FILENO, stdout);
reopen_console_handle(STD_ERROR_HANDLE, STDERR_FILENO, stderr);
return true;
}
void terminal_init(void)
{
CONSOLE_SCREEN_BUFFER_INFO cinfo;
DWORD cmode = 0;
GetConsoleMode(hSTDOUT, &cmode);
cmode |= (ENABLE_PROCESSED_OUTPUT | ENABLE_WRAP_AT_EOL_OUTPUT);
attempt_native_out_vt(hSTDOUT, cmode);
attempt_native_out_vt(hSTDERR, cmode);
GetConsoleScreenBufferInfo(hSTDOUT, &cinfo);
stdoutAttrs = cinfo.wAttributes;
}
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