Console bug

[justsomeguy]

Well I'll go ahead and post a snippet of how I worked around that. The shell script was gleaned from Stackoverflow. The results are copied to the clipboard and then accessed by you program. Of course the snippet was bracketed by a meta condition of it being Linux.

Code: (Select All)

    'In linux, there is no easy way to get output of the

    'cursor position query "ESC[6n". One has to resort to

    'dirty tricks to get the output.

    DIM AS STRING script, clipboardTemp

    clipboardTemp = _CLIPBOARD$

    'If shell script doesn't exist create it

    IF NOT _FILEEXISTS("rc.sh") THEN

      f = FREEFILE

      script = script + "#!/bin/sh" + CHR$(10)

      script = script + "if [ -t 0 ] && [ -t 1 ]; then" + CHR$(10)

      'Save the terminal setting into a temp variable

      script = script + "  old_settings=$(stty -g) || exit" + CHR$(10)

      'In case of problem, restore settings

      script = script + "  trap 'stty " + CHR$(34) + "$(old_settings)" + CHR$(34) + "' INT TERM QUIT ALRM" + CHR$(10)

      'Set the terminal settings to receive the output of the query

      script = script + "  stty -icanon -echo min 0 time 3 || exit" + CHR$(10)

      'Make the query

      script = script + "  printf '\033[6n'" + CHR$(10)

      'Perform black magic to get the results of query

      script = script + "  pos=$(dd count=1 2> /dev/null)" + CHR$(10)

      script = script + "  pos=${pos%R*}" + CHR$(10)

      script = script + "  pos=${pos##*\[}" + CHR$(10)

      script = script + "  x=${pos##*;} y=${pos%%;*}" + CHR$(10)

      'Restore terminal state

      script = script + "  stty " + CHR$(34) + "$old_settings" + CHR$(34) + CHR$(10)

      script = script + "  trap - INT TERM QUIT ALRM" + CHR$(10)

      script = script + "fi" + CHR$(10)

      'Spit results to clipboard

      $IF MAC THEN

      script = script + "echo " + CHR$(34) + "$x:$y" + CHR$(34) + " | pbcopy" + CHR$(10)

      $ELSE

        script = script + "echo " + CHR$(34) + "$x:$y" + CHR$(34) + " | xclip -selection clipboard" + CHR$(10)

      $END IF

      OPEN "rc.sh" FOR OUTPUT AS f

      PRINT #f, script;

      CLOSE f

      'Make the script executable

      SHELL _HIDE "chmod +x rc.sh"

    END IF



    SHELL "./rc.sh"

    c$ = _CLIPBOARD$

    _CLIPBOARD$ = clipboardTemp

    y$ = LEFT$(c$, INSTR(c$, ":"))

    x$ = MID$(c$, INSTR(c$, ":") + 1)

    y = VAL(y$): x = VAL(x$)

There is also a way to do it in C. This is not my code, but I tested it and it does work.

Code: (Select All)

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>
#include <string.h>

int getCursorPosition(int *x, int *y) {
    struct termios old_termios;
    char response[32];
    int i = 0;
    char c;
   
    // Save current terminal settings
    tcgetattr(STDIN_FILENO, &old_termios);
   
    // Set terminal to non-canonical mode
    struct termios new_termios = old_termios;
    new_termios.c_lflag &= ~(ICANON | ECHO);
    new_termios.c_cc[VMIN] = 0;
    new_termios.c_cc[VTIME] = 0;
    tcsetattr(STDIN_FILENO, TCSANOW, &new_termios);
   
    // Send cursor position request
    printf("\033[6n");
    fflush(stdout);
   
    // Read the response
    while (i < sizeof(response) - 1) {
        if (read(STDIN_FILENO, &c, 1) > 0) {
            response[i++] = c;
            if (c == 'R') break;
        }
    }
   
    response[i] = '\0';
   
    // Restore terminal settings
    tcsetattr(STDIN_FILENO, TCSANOW, &old_termios);
   
    // Parse response: ESC[<row>;<col>R
    if (i > 3 && response[0] == '\033' && response[1] == '[') {
        char *ptr = response + 2;
        char *end;
       
        *y = strtol(ptr, &end, 10);
        if (*end == ';') {
            *x = strtol(end + 1, NULL, 10);
            return 1;
        }
    }
   
    return 0;
}

int main() {
    int x, y;
   
    printf("Current cursor position:\n");
   
    if (getCursorPosition(&x, &y)) {
        printf("X = %d, Y = %d\n", x, y);
    } else {
        printf("Could not determine cursor position\n");
    }
   
    return 0;
}