diff options
Diffstat (limited to 'historic/selection/selection.c')
| -rw-r--r-- | historic/selection/selection.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/historic/selection/selection.c b/historic/selection/selection.c new file mode 100644 index 000000000..058936fc5 --- /dev/null +++ b/historic/selection/selection.c @@ -0,0 +1,237 @@ +/* implement copying and pasting in Linux virtual consoles */ +/* Andrew Haylett, 17th June 1993 */ +/* Wed Feb 15 09:33:16 1995, faith@cs.unc.edu changed tty0 to console, since + most systems don't have a tty0 any more. */ + +#include <unistd.h> +#include <stdio.h> +#include <termios.h> +#include <fcntl.h> +#include <signal.h> +#include <errno.h> +#include <sys/kd.h> +#include <sys/ioctl.h> +#include <sys/time.h> + +#include "mouse.h" + +extern int ms_copy_button, ms_paste_button; + +static const int SCALE = 10; +static const long CLICK_INTERVAL = 250; /* msec */ +static const char *console = "/dev/console"; + +typedef enum { character = 0, word = 1, line = 2 } sel_mode; + +static int open_console(const int mode); +static void set_sel(const int xs, const int ys, const int xe, + const int ye, const sel_mode mode); +static void paste(void); +static long interval(const struct timeval *t1, const struct timeval *t2); +static int check_mode(void); + +int +main(int argc, char *argv[]) +{ + struct ms_event ev; + struct winsize win; + struct timeval tv1, tv2; + int xs, ys, xe, ye, x1, y1, fd, clicks = 0; + sel_mode mode; + + fd = open_console(O_RDONLY); + ioctl(fd, TIOCGWINSZ, &win); + close(fd); + if (! win.ws_col || ! win.ws_row) + { + fprintf(stderr, "selection: zero screen dimension, assuming 80x25.\n"); + win.ws_col = 80; + win.ws_row = 25; + } + + ms_params(argc, argv); + + if (ms_init(win.ws_col * SCALE - 1, win.ws_row * SCALE - 1)) + exit(1); + + if (fork() > 0) + exit(0); + setsid(); + + gettimeofday(&tv1, (struct timezone *)NULL); + +restart: + while (1) + { + if (check_mode()) + goto restart; + if (get_ms_event(&ev)) + exit(1); + if (ev.ev_butstate == ms_copy_button) + { + ++clicks; + gettimeofday(&tv2, (struct timezone *)NULL); + xs = ev.ev_x / SCALE + 1; + ys = ev.ev_y / SCALE + 1; + if (interval(&tv1, &tv2) < CLICK_INTERVAL && clicks == 1) + { + mode = word; + set_sel(xs, ys, xs, ys, mode); + } + else if (interval(&tv1, &tv2) < CLICK_INTERVAL && clicks == 2) + { + mode = line; + set_sel(xs, ys, xs, ys, mode); + } + else + { + mode = character; + clicks = 0; + do /* wait for left button up */ + { + if (check_mode()) + goto restart; + if (get_ms_event(&ev)) + exit(1); + } while (ev.ev_butstate); + x1 = y1 = 0; + do /* track start selection until left button down */ + { + xs = ev.ev_x / SCALE + 1; + ys = ev.ev_y / SCALE + 1; + if (xs != x1 || ys != y1) + { + set_sel(xs, ys, xs, ys, mode); + x1 = xs; y1 = ys; + } + if (check_mode()) + goto restart; + if (get_ms_event(&ev)) + exit(1); + } while (ev.ev_butstate != ms_copy_button); + } + x1 = y1 = 0; + gettimeofday(&tv1, (struct timezone *)NULL); + do /* track end selection until left button up */ + { + xe = ev.ev_x / SCALE + 1; + ye = ev.ev_y / SCALE + 1; + if (xe != x1 || ye != y1) + { + set_sel(xs, ys, xe, ye, mode); + x1 = xe; y1 = ye; + } + if (check_mode()) + goto restart; + if (get_ms_event(&ev)) + exit(1); + } while (ev.ev_butstate == ms_copy_button); + } else if (ev.ev_butstate == ms_paste_button) + { /* paste selection */ + paste(); + do /* wait for right button up */ + { + if (check_mode()) + goto restart; + if (get_ms_event(&ev)) + exit(1); + } while (ev.ev_butstate); + gettimeofday(&tv1, (struct timezone *)NULL); + clicks = 0; + } + } +} + +/* We have to keep opening and closing the console because (a) /dev/tty0 + changed its behaviour at some point such that the current VC is fixed + after the open(), rather than being re-evaluated at each write(), and (b) + because we seem to lose our grip on /dev/tty? after someone logs in if + this is run from /etc/rc. */ + +static int +open_console(const int mode) +{ + int fd; + + if ((fd = open(console, mode)) < 0) + { + perror("selection: open_console()"); + exit(1); + } + return fd; +} + +/* mark selected text on screen. */ +static void +set_sel(const int xs, const int ys, + const int xe, const int ye, const sel_mode mode) +{ + unsigned char buf[sizeof(char) + 5 * sizeof(short)]; + unsigned short *arg = (unsigned short *)(buf + 1); + int fd; + + buf[0] = 2; + + arg[0] = xs; + arg[1] = ys; + arg[2] = xe; + arg[3] = ye; + arg[4] = mode; + + fd = open_console(O_WRONLY); + if (ioctl(fd, TIOCLINUX, buf) < 0) + { + perror("selection: ioctl(..., TIOCLINUX, ...)"); + exit(1); + } + close(fd); +} + +/* paste contents of selection buffer into console. */ +static void +paste(void) +{ + char c = 3; + int fd; + + fd = open_console(O_WRONLY); + if (ioctl(fd, TIOCLINUX, &c) < 0) + { + perror("selection: ioctl(..., TIOCLINUX, ...)"); + exit(1); + } + close(fd); +} + +/* evaluate interval between times. */ +static long +interval(const struct timeval *t1, const struct timeval *t2) +{ + return (t2->tv_sec - t1->tv_sec) * 1000 + + (t2->tv_usec - t1->tv_usec) / 1000; +} + +/* Check whether console is in graphics mode; if so, wait until it isn't. */ +static int +check_mode(void) +{ + int fd, ch = 0; + long kd_mode; + + do + { + fd = open_console(O_RDONLY); + if (ioctl(fd, KDGETMODE, &kd_mode) < 0) + { + perror("selection: ioctl(..., KDGETMODE, ...)"); + exit(1); + } + close(fd); + if (kd_mode != KD_TEXT) + { + ++ch; + sleep(2); + } + } while (kd_mode != KD_TEXT); + return (ch > 0); +} |