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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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <fcntl.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <windows.h>
#include <io.h>
#include <pthread.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"
#define hSTDOUT GetStdHandle(STD_OUTPUT_HANDLE)
#define hSTDERR GetStdHandle(STD_ERROR_HANDLE)
#define FOREGROUND_ALL (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE)
static short stdoutAttrs = 0;
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 bool running;
static HANDLE death;
static pthread_t input_thread;
static struct input_ctx *input_ctx;
void terminal_get_size(int *w, int *h)
{
CONSOLE_SCREEN_BUFFER_INFO cinfo;
if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cinfo)) {
*w = cinfo.dwMaximumWindowSize.X - 1;
*h = cinfo.dwMaximumWindowSize.Y;
}
}
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 void *input_thread_fn(void *ptr)
{
mpthread_set_name("terminal");
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);
}
return NULL;
}
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 (pthread_create(&input_thread, NULL, input_thread_fn, in)) {
CloseHandle(death);
return;
}
running = true;
}
}
void terminal_uninit(void)
{
if (running) {
SetEvent(death);
pthread_join(input_thread, NULL);
input_ctx = NULL;
running = false;
}
}
bool terminal_in_background(void)
{
return false;
}
static void write_console_text(HANDLE wstream, char *buf)
{
wchar_t *out = mp_from_utf8(NULL, buf);
size_t out_len = wcslen(out);
WriteConsoleW(wstream, out, out_len, NULL, NULL);
talloc_free(out);
}
// Mutates the input argument (buf), because we're evil.
void mp_write_console_ansi(HANDLE wstream, char *buf)
{
while (*buf) {
char *next = strchr(buf, '\033');
if (!next) {
write_console_text(wstream, buf);
break;
}
next[0] = '\0'; // mutate input for fun and profit
write_console_text(wstream, buf);
if (next[1] != '[') {
write_console_text(wstream, "\033");
buf = next;
continue;
}
next += 2;
// ANSI 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[2] = {-1, -1}; // 'm' might be unlimited; ignore that
int num_params = 0;
while (num_params < 2) {
char *end = next;
long p = strtol(next, &end, 10);
if (end == next)
break;
next = end;
params[num_params++] = p;
if (next[0] != ';' || !next[0])
break;
next += 1;
}
char 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"
for (int n = 0; n < num_params; n++) {
int p = params[n];
if (p == 0) {
info.wAttributes = stdoutAttrs;
SetConsoleTextAttribute(wstream, info.wAttributes);
} else if (p == 1) {
info.wAttributes |= FOREGROUND_INTENSITY;
SetConsoleTextAttribute(wstream, info.wAttributes);
} else if (p >= 30 && p < 38) {
info.wAttributes &= ~FOREGROUND_ALL;
info.wAttributes |= ansi2win32[p - 30];
SetConsoleTextAttribute(wstream, info.wAttributes);
}
}
break;
}
}
buf = next;
}
}
static bool is_a_console(HANDLE h)
{
return GetConsoleMode(h, &(DWORD){0});
}
static void reopen_console_handle(DWORD std, int fd, FILE *stream)
{
if (is_a_console(GetStdHandle(std))) {
freopen("CONOUT$", "wt", stream);
dup2(fileno(stream), fd);
setvbuf(stream, NULL, _IONBF, 0);
}
}
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 output streams to that console's
// low-level handles, so things that use printf directly work later on.
reopen_console_handle(STD_OUTPUT_HANDLE, STDOUT_FILENO, stdout);
reopen_console_handle(STD_ERROR_HANDLE, STDERR_FILENO, stderr);
return true;
}
int terminal_init(void)
{
CONSOLE_SCREEN_BUFFER_INFO cinfo;
DWORD cmode = 0;
GetConsoleMode(hSTDOUT, &cmode);
cmode |= (ENABLE_PROCESSED_OUTPUT | ENABLE_WRAP_AT_EOL_OUTPUT);
SetConsoleMode(hSTDOUT, cmode);
SetConsoleMode(hSTDERR, cmode);
GetConsoleScreenBufferInfo(hSTDOUT, &cinfo);
stdoutAttrs = cinfo.wAttributes;
return 0;
}
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