diff options
| -rwxr-xr-x | src/utils.c | 173 |
1 files changed, 142 insertions, 31 deletions
diff --git a/src/utils.c b/src/utils.c index 20d036e..561bbcc 100755 --- a/src/utils.c +++ b/src/utils.c @@ -1,4 +1,4 @@ -/* $calcurse: utils.c,v 1.10 2006/09/17 10:45:06 culot Exp $ */ +/* $calcurse: utils.c,v 1.11 2006/10/28 09:57:07 culot Exp $ */ /* * Calcurse - text-based organizer @@ -116,49 +116,160 @@ print_in_middle(WINDOW * win, int starty, int startx, int width, char *string) custom_remove_attr(win, ATTR_HIGHEST); } +/* Delete a character at the given position in string. */ +void del_char(int pos, char *str) +{ + str += pos; + for (; *str; ++str) + *str = *(str + 1); + *str = 0; +} + +/* Add a character at the given position in string. */ +char *add_char(int pos, int ch, char *str) +{ + int new, buf; + + str += pos; + buf = *str; + *str++ = ch; + new = buf; + for (; *str; ++str) { + buf = *str; + *str = new; + new = buf; + } + *str++ = new; + return str; +} + +/* + * Draw the cursor at the correct position in string. + * As echoing is not set, we need to know the string we are working on to + * handle display correctly. + */ +void showcursor(WINDOW *win, int y, int pos, char *str, int l, int offset) +{ + char *nc; + + nc = str + pos; + wmove(win, y, pos - offset); + (pos >= l) ? waddch(win, SPC|A_REVERSE) : waddch(win, *nc|A_REVERSE); +} + +/* Print the string at the desired position. */ +void showstring(WINDOW *win, int y, int x, char *str, int len, int pos) +{ + const int rec = 30, border = 3; + const int max_col = col - border, max_len = max_col - rec; + int page, max_page, offset, c = 0; + char *orig; + + orig = str; + max_page = (len - rec) / max_len; + page = (pos - rec) / max_len; + offset = page * max_len; + str += offset; + mvwaddnstr(win, y, x, str, MIN(len, max_col)); + wclrtoeol(win); + if (page > 0 && page < max_page) { + c = '*'; + } else if (page > 0) { + c = '<'; + } else if (page < max_page) { + c = '>'; + } else + c = 0; + mvwprintw(win, y, col - 1, "%c", c); + showcursor(win, y, pos, orig, len, offset); +} + /* * Getstring allows to get user input and to print it on a window, - * even if noecho() is on. + * even if noecho() is on. This function is also used to modify an existing + * text (the variable string can be non-NULL). + * We need to do the echoing manually because of the multi-threading + * environment, otherwise the cursor would move from place to place without + * control. */ -void getstring(win, colr, string, start_x, start_y) -WINDOW *win; -int colr; -char *string; -int start_x, start_y; +int getstring(WINDOW *win, int colr, char *string, int x, int y) { - int ch; - int charcount = 0; + int ch, newpos, len = 0; + char *orig; + orig = string; custom_apply_attr(win, ATTR_HIGHEST); - if (start_x != -1) - wmove(win, start_y, start_x); - + for (; *string; ++string, ++len); + newpos = x + len; + showstring(win, y, x, orig, len, newpos); + while ((ch = wgetch(win)) != '\n') { - if ((ch == KEY_BACKSPACE) || - (ch == 330) || - (ch == 263) || - (ch == 127) || - (ch == CTRL('H')) ) { - if (charcount > 0) { - string--; - charcount--; - wmove(win, start_y, start_x + charcount); - waddch(win, ' '); - wmove(win, start_y, start_x + charcount); + + switch (ch) { + + case KEY_BACKSPACE: /* delete one character */ + case 330: + case 127: + case CTRL('H'): + if (len > 0) { + --newpos; --len; + if (newpos >= x + len) + --string; + else /* to be deleted inside string */ + del_char(newpos, orig); } - } else if (ch == ESCAPE) { - *string = NULL; - return; - } else { - *string++ = ch; - charcount++; - waddch(win, ch); + break; + + case CTRL('D'): /* delete next character */ + --len; + del_char(newpos, orig); + break; + + case CTRL('K'): /* delete to end-of-line */ + string = orig + newpos; + for (; *string; ++string) + *string = 0; + len -= (len - newpos); + break; + + case CTRL('A'): /* go to begginning of string */ + newpos = x; + break; + + case CTRL('E'): /* go to end of string */ + newpos = x + len; + break; + + case KEY_LEFT: /* move one char backward */ + case CTRL('B'): + if (newpos > x) newpos--; + break; + + case KEY_RIGHT: /* move one char forward */ + case CTRL('F'): + if (newpos < len) newpos++; + break; + + case ESCAPE: /* cancel editing */ + return 1; + break; + + default: /* insert one character */ + if (len < MAX_LENGTH - 1) { + if (newpos >= len) + *string++ = ch; + else // char is to be inserted inside string + string = add_char(newpos, ch, orig); + ++len; ++newpos; + } + } + showstring(win, y, x, orig, len, newpos); doupdate(); } *string = 0; custom_remove_attr(win, ATTR_HIGHEST); - return; + return 0; } /* checks if a string is only made of digits */ |