diff options
Diffstat (limited to 'usr.bin/talk/display.c')
| -rw-r--r-- | usr.bin/talk/display.c | 190 |
1 files changed, 107 insertions, 83 deletions
diff --git a/usr.bin/talk/display.c b/usr.bin/talk/display.c index 591953e..0acf1ce 100644 --- a/usr.bin/talk/display.c +++ b/usr.bin/talk/display.c @@ -41,9 +41,14 @@ static const char sccsid[] = "@(#)display.c 8.1 (Berkeley) 6/6/93"; */ #include <ctype.h> #include <unistd.h> +#include <wctype.h> +#define _XOPEN_SOURCE_EXTENDED +#include <curses.h> #include "talk.h" +void display(xwin_t *, wchar_t *); + xwin_t my_win; xwin_t his_win; WINDOW *line_win; @@ -61,111 +66,130 @@ max(int a, int b) return (a > b ? a : b); } +static cchar_t * +makecchar(wchar_t in) +{ + static cchar_t cc; + wchar_t wc[2]; + + wc[0] = in; + wc[1] = L'\0'; + + if (setcchar(&cc, wc, A_NORMAL, 0, NULL) != OK) + p_error("settchar(3) failure"); + + return (&cc); +} + /* - * Display some text on somebody's window, processing some control + * Display a symbol on somebody's window, processing some control * characters while we are at it. */ void -display(xwin_t *win, char *text, int size) +display(xwin_t *win, wchar_t *wc) { - int i; - char cch; - - for (i = 0; i < size; i++) { - if (*text == '\n' || *text == '\r') { - waddch(win->x_win, '\n'); - getyx(win->x_win, win->x_line, win->x_col); - text++; - continue; - } - if (*text == 004 && win == &my_win) { - /* control-D clears the screen */ + + /* + * Alas, can't use variables in C switch statement. + * Workaround these 3 cases with goto. + */ + if (*wc == win->kill) + goto kill; + else if (*wc == win->cerase) + goto cerase; + else if (*wc == win->werase) + goto werase; + + switch (*wc) { + case L'\n': + case L'\r': + wadd_wch(win->x_win, makecchar(L'\n')); + getyx(win->x_win, win->x_line, win->x_col); + wrefresh(win->x_win); + return; + + case 004: + if (win == &my_win) { + /* Ctrl-D clears the screen. */ werase(my_win.x_win); getyx(my_win.x_win, my_win.x_line, my_win.x_col); wrefresh(my_win.x_win); werase(his_win.x_win); getyx(his_win.x_win, his_win.x_line, his_win.x_col); wrefresh(his_win.x_win); - text++; - continue; } + return; - /* erase character */ - if ( *text == win->cerase - || *text == 010 /* BS */ - || *text == 0177 /* DEL */ - ) { - wmove(win->x_win, win->x_line, max(--win->x_col, 0)); - getyx(win->x_win, win->x_line, win->x_col); - waddch(win->x_win, ' '); - wmove(win->x_win, win->x_line, win->x_col); - getyx(win->x_win, win->x_line, win->x_col); - text++; - continue; - } + /* Erase character. */ + case 010: /* BS */ + case 0177: /* DEL */ +cerase: + wmove(win->x_win, win->x_line, max(--win->x_col, 0)); + getyx(win->x_win, win->x_line, win->x_col); + waddch(win->x_win, ' '); + wmove(win->x_win, win->x_line, win->x_col); + getyx(win->x_win, win->x_line, win->x_col); + wrefresh(win->x_win); + return; + + case 027: /* ^W */ +werase: + { /* * On word erase search backwards until we find * the beginning of a word or the beginning of * the line. */ - if ( *text == win->werase - || *text == 027 /* ^W */ - ) { - int endcol, xcol, ii, c; - - endcol = win->x_col; - xcol = endcol - 1; - while (xcol >= 0) { - c = readwin(win->x_win, win->x_line, xcol); - if (c != ' ') - break; - xcol--; - } - while (xcol >= 0) { - c = readwin(win->x_win, win->x_line, xcol); - if (c == ' ') - break; - xcol--; - } - wmove(win->x_win, win->x_line, xcol + 1); - for (ii = xcol + 1; ii < endcol; ii++) - waddch(win->x_win, ' '); - wmove(win->x_win, win->x_line, xcol + 1); - getyx(win->x_win, win->x_line, win->x_col); - text++; - continue; - } - /* line kill */ - if ( *text == win->kill - || *text == 025 /* ^U */ - ) { - wmove(win->x_win, win->x_line, 0); - wclrtoeol(win->x_win); - getyx(win->x_win, win->x_line, win->x_col); - text++; - continue; - } - if (*text == '\f') { - if (win == &my_win) - wrefresh(curscr); - text++; - continue; + int endcol, xcol, c; + + endcol = win->x_col; + xcol = endcol - 1; + while (xcol >= 0) { + c = readwin(win->x_win, win->x_line, xcol); + if (c != ' ') + break; + xcol--; } - if (*text == '\7') { - write(STDOUT_FILENO, text, 1); - text++; - continue; + while (xcol >= 0) { + c = readwin(win->x_win, win->x_line, xcol); + if (c == ' ') + break; + xcol--; } - if (!isprint((unsigned char)*text) && *text != '\t') { - waddch(win->x_win, '^'); - getyx(win->x_win, win->x_line, win->x_col); - cch = (*text & 63) + 64; - waddch(win->x_win, cch); - } else - waddch(win->x_win, (unsigned char)*text); + wmove(win->x_win, win->x_line, xcol + 1); + for (int i = xcol + 1; i < endcol; i++) + waddch(win->x_win, ' '); + wmove(win->x_win, win->x_line, xcol + 1); getyx(win->x_win, win->x_line, win->x_col); - text++; + wrefresh(win->x_win); + return; + } + + case 025: /* ^U */ +kill: + wmove(win->x_win, win->x_line, 0); + wclrtoeol(win->x_win); + getyx(win->x_win, win->x_line, win->x_col); + wrefresh(win->x_win); + return; + + case L'\f': + if (win == &my_win) + wrefresh(curscr); + return; + + case L'\7': + write(STDOUT_FILENO, wc, sizeof(*wc)); + return; } + + + if (iswprint(*wc) || *wc == L'\t') + wadd_wch(win->x_win, makecchar(*wc)); + else + beep(); + + getyx(win->x_win, win->x_line, win->x_col); wrefresh(win->x_win); } |
