From 5e112e69e589ee812f87b7496e2f325be513e2f7 Mon Sep 17 00:00:00 2001
From: Frederic Culot <calcurse@culot.org>
Date: Sat, 28 Oct 2006 09:57:07 +0000
Subject: getstring() improved to allow the modification of an existing string
shwostring(), showcursor(), del_char() and add_char() created
---
src/utils.c | 173 +++++++++++++++++++++++++++++++++++++++++++++++++-----------
1 file changed, 142 insertions(+), 31 deletions(-)
(limited to 'src')
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 */
--
cgit v1.2.3-70-g09d2