113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
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/*
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term_win32: Windows-specifc terminal functionality
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This is a very lightweight terminal library, just the minimum to
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- get at the width of the terminal (if there is one)
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- be able to read single keys being pressed for control
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- maybe also switch of echoing of input
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copyright 2008-2022 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http://mpg123.org
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initially written by Thomas Orgis and Jonathan Yong
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*/
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#include "config.h"
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#include "compat/compat.h"
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#include "terms.h"
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#define WIN32_LEAN_AND_MEAN 1
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#include <io.h>
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#include <ctype.h>
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#include <windows.h>
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#include <wincon.h>
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#include "common/debug.h"
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static HANDLE consoleintput = INVALID_HANDLE_VALUE;
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static HANDLE consoleoutput = INVALID_HANDLE_VALUE;
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static HANDLE getconsoleintput(void){
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DWORD mode;
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if(consoleintput == INVALID_HANDLE_VALUE){
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consoleintput = CreateFileW(L"CONIN$", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
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if(consoleintput == INVALID_HANDLE_VALUE || consoleintput == NULL)
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return consoleintput;
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GetConsoleMode(consoleintput, &mode);
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mode |= ENABLE_LINE_INPUT|ENABLE_PROCESSED_INPUT|ENABLE_WINDOW_INPUT;
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mode &= ~(ENABLE_ECHO_INPUT|ENABLE_QUICK_EDIT_MODE|ENABLE_MOUSE_INPUT);
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SetConsoleMode(consoleintput, mode);
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}
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return consoleintput;
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}
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static HANDLE getconsole(void){
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if(consoleoutput == INVALID_HANDLE_VALUE){
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consoleoutput = CreateFileW(L"CONOUT$", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
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}
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return consoleoutput;
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}
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// No fun for windows until we reorganize control character stuff.
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int term_have_fun(int fd, int want_visuals)
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{
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return 0;
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}
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int term_setup(void)
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{
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return 0;
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}
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void term_restore(void){
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CloseHandle(consoleintput);
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CloseHandle(consoleoutput);
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consoleintput = INVALID_HANDLE_VALUE;
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consoleoutput = INVALID_HANDLE_VALUE;
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}
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int term_width(int fd)
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{
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CONSOLE_SCREEN_BUFFER_INFO pinfo;
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HANDLE h;
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h = getconsole();
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if(h == INVALID_HANDLE_VALUE || h == NULL)
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return -1;
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if(GetConsoleScreenBufferInfo(h, &pinfo))
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// One less than actual width, as Terminal advances
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// to next line with the last character.
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return pinfo.dwMaximumWindowSize.X -1;
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return -1;
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}
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int term_present(void){
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return GetConsoleWindow() ? 1 : 0;
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}
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/* Get the next pressed key, if any.
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Returns 1 when there is a key, 0 if not. */
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int term_get_key(int stopped, int do_delay, char *val){
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INPUT_RECORD record;
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HANDLE input;
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DWORD res;
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input = getconsoleintput();
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if(input == NULL || input == INVALID_HANDLE_VALUE)
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return 0;
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while(WaitForSingleObject(input, stopped ? INFINITE : (do_delay ? 10 : 0)) == WAIT_OBJECT_0){
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do_delay = 0;
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if(!ReadConsoleInput(input, &record, 1, &res))
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return 0;
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if(record.EventType == KEY_EVENT && record.Event.KeyEvent.bKeyDown){
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*val = record.Event.KeyEvent.uChar.AsciiChar;
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return 1;
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}
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}
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return 0;
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}
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