diff options
Diffstat (limited to 'gnu/lib/libdialog/lineedit.c')
| -rw-r--r-- | gnu/lib/libdialog/lineedit.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/gnu/lib/libdialog/lineedit.c b/gnu/lib/libdialog/lineedit.c new file mode 100644 index 0000000..138aa41 --- /dev/null +++ b/gnu/lib/libdialog/lineedit.c @@ -0,0 +1,168 @@ +/* + * inputbox.c -- implements the input box + * + * AUTHOR: Savio Lam (lam836@cs.cuhk.hk) + * + * This program 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. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + + +#include <dialog.h> +#include "dialog.priv.h" + + +/* + * Line editor + */ +int line_edit(WINDOW* dialog, int box_y, int box_x, int box_width, chtype attr, int first, unsigned char *result) +{ + int i, key; + static int input_x, scroll; + static unsigned char instr[MAX_LEN+1]; + + if (first) { + keypad(dialog, TRUE); + memset(instr, 0, sizeof(instr)); + input_x = scroll = 0; + } + + wattrset(dialog, attr); + wmove(dialog, box_y, box_x + input_x); + wrefresh(dialog); + for (;;) { + key = wgetch(dialog); + switch (key) { + case TAB: + case KEY_BTAB: + case KEY_UP: + case KEY_DOWN: + case ESC: + case '\n': + for (i = strlen(instr) - 1; i >= scroll + input_x && instr[i] == ' '; i--) + instr[i] = '\0'; + goto ret; + case KEY_HOME: + input_x = scroll = 0; + wmove(dialog, box_y, box_x); + for (i = 0; i < box_width; i++) + waddch(dialog, instr[i] ? instr[i] : ' '); + wmove(dialog, box_y, box_x); + wrefresh(dialog); + continue; + case KEY_END: + for (i = strlen(instr) - 1; i >= scroll + input_x && instr[i] == ' '; i--) + instr[i] = '\0'; + i++; + input_x = i % box_width; + scroll = i - input_x; + wmove(dialog, box_y, box_x); + for (i = 0; i < box_width; i++) + waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' '); + wmove(dialog, box_y, input_x + box_x); + wrefresh(dialog); + continue; + case KEY_LEFT: + if (input_x || scroll) { + wattrset(dialog, inputbox_attr); + if (!input_x) { + int oldscroll = scroll; + scroll = scroll < box_width-1 ? 0 : scroll-(box_width-1); + wmove(dialog, box_y, box_x); + for (i = 0; i < box_width; i++) + waddch(dialog, instr[scroll+input_x+i] ? instr[scroll+input_x+i] : ' '); + input_x = oldscroll - 1 - scroll; + } + else + input_x--; + wmove(dialog, box_y, input_x + box_x); + wrefresh(dialog); + } + continue; + case KEY_RIGHT: + if (scroll+input_x < MAX_LEN) { + wattrset(dialog, inputbox_attr); + if (!instr[scroll+input_x]) + instr[scroll+input_x] = ' '; + if (input_x == box_width-1) { + scroll++; + wmove(dialog, box_y, box_x); + for (i = 0; i < box_width; i++) + waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' '); + wmove(dialog, box_y, box_x + box_width - 1); + } + else { + wmove(dialog, box_y, input_x + box_x); + waddch(dialog, instr[scroll+input_x]); + input_x++; + } + wrefresh(dialog); + } else + flash(); /* Alarm user about overflow */ + continue; + case KEY_BACKSPACE: + case KEY_DC: + if (input_x || scroll) { + i = strlen(instr); + memmove(instr+scroll+input_x-1, instr+scroll+input_x, i-scroll+input_x+1); + wattrset(dialog, inputbox_attr); + if (!input_x) { + int oldscroll = scroll; + scroll = scroll < box_width-1 ? 0 : scroll-(box_width-1); + wmove(dialog, box_y, box_x); + for (i = 0; i < box_width; i++) + waddch(dialog, instr[scroll+input_x+i] ? instr[scroll+input_x+i] : ' '); + input_x = oldscroll - 1 - scroll; + } + else + input_x--; + wmove(dialog, box_y, input_x + box_x); + for (i = input_x; i < box_width; i++) + waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' '); + wmove(dialog, box_y, input_x + box_x); + wrefresh(dialog); + } + continue; + default: + if (key < 0x100 && isprint(key)) { + for (i = strlen(instr) - 1; i >= scroll + input_x && instr[i] == ' '; i--) + instr[i] = '\0'; + i++; + if (i < MAX_LEN) { + memmove(instr+scroll+input_x+1, instr+scroll+input_x, i-scroll+input_x); + wattrset(dialog, inputbox_attr); + instr[scroll+input_x] = key; + if (input_x == box_width-1) { + scroll++; + wmove(dialog, box_y, box_x); + for (i = 0; i < box_width-1; i++) + waddch(dialog, instr[scroll+i]); + } + else { + wmove(dialog, box_y, input_x + box_x); + for (i = input_x; i < box_width; i++) + waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' '); + wmove(dialog, box_y, ++input_x + box_x); + } + wrefresh(dialog); + } else + flash(); /* Alarm user about overflow */ + continue; + } + } + } +ret: + strcpy(result, instr); + return key; +} |
