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Diffstat (limited to 'contrib/syslinux-4.02/com32/cmenu/libmenu/tui.c')
-rw-r--r--contrib/syslinux-4.02/com32/cmenu/libmenu/tui.c258
1 files changed, 258 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/cmenu/libmenu/tui.c b/contrib/syslinux-4.02/com32/cmenu/libmenu/tui.c
new file mode 100644
index 0000000..dd69277
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/cmenu/libmenu/tui.c
@@ -0,0 +1,258 @@
+/* -*- c -*- ------------------------------------------------------------- *
+ *
+ * Copyright 2004-2006 Murali Krishnan Ganapathy - All Rights Reserved
+ *
+ * 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, Inc., 53 Temple Place Ste 330,
+ * Boston MA 02111-1307, USA; either version 2 of the License, or
+ * (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+#include "tui.h"
+#include <string.h>
+#include <com32.h>
+#include <stdlib.h>
+#include "com32io.h"
+
+com32sys_t inreg, outreg; // Global register sets for use
+
+char bkspstr[] = " \b$";
+char eolstr[] = "\n$";
+
+// Reads a line of input from stdin. Replace CR with NUL byte
+// password <> 0 implies not echoed on screen
+// showoldvalue <> 0 implies currentvalue displayed first
+// If showoldvalue <> 0 then caller responsibility to ensure that
+// str is NULL terminated.
+void getuserinput(char *stra, unsigned int size, unsigned int password,
+ unsigned int showoldvalue)
+{
+ unsigned int c;
+ char *p, *q; // p = current char of string, q = tmp
+ char *last; // The current last char of string
+ char *str; // pointer to string which is going to be allocated
+ char row, col;
+ char start, end; // Cursor shape
+ char fudge; // How many chars should be removed from output
+ char insmode; // Are we in insert or overwrite
+
+ getpos(&row, &col, 0); // Get current position
+ getcursorshape(&start, &end);
+ insmode = 1;
+
+ str = (char *)malloc(size + 1); // Allocate memory to store user input
+ memset(str, 0, size + 1); // Zero it out
+ if (password != 0)
+ showoldvalue = 0; // Password's never displayed
+
+ if (showoldvalue != 0)
+ strcpy(str, stra); // If show old value copy current value
+
+ last = str;
+ while (*last) {
+ last++;
+ } // Find the terminating null byte
+ p = str + strlen(str);
+
+ if (insmode == 0)
+ setcursorshape(1, 7); // Block cursor
+ else
+ setcursorshape(6, 7); // Normal cursor
+
+ // Invariants: p is the current char
+ // col is the corresponding column on the screen
+ if (password == 0) // Not a password, print initial value
+ {
+ gotoxy(row, col);
+ csprint(str, GETSTRATTR);
+ }
+ while (1) { // Do forever
+ c = get_key(stdin, 0);
+ if (c == KEY_ENTER)
+ break; // User hit Enter getout of loop
+ if (c == KEY_ESC) // User hit escape getout and nullify string
+ {
+ *str = 0;
+ break;
+ }
+ fudge = 0;
+ // if scan code is regognized do something
+ // else if char code is recognized do something
+ // else ignore
+ switch (c) {
+ case KEY_HOME:
+ p = str;
+ break;
+ case KEY_END:
+ p = last;
+ break;
+ case KEY_LEFT:
+ if (p > str)
+ p--;
+ break;
+ case KEY_CTRL(KEY_LEFT):
+ if (p == str)
+ break;
+ if (*p == ' ')
+ while ((p > str) && (*p == ' '))
+ p--;
+ else {
+ if (*(p - 1) == ' ') {
+ p--;
+ while ((p > str) && (*p == ' '))
+ p--;
+ }
+ }
+ while ((p > str) && ((*p == ' ') || (*(p - 1) != ' ')))
+ p--;
+ break;
+ case KEY_RIGHT:
+ if (p < last)
+ p++;
+ break;
+ case KEY_CTRL(KEY_RIGHT):
+ if (*p == 0)
+ break; // At end of string
+ if (*p != ' ')
+ while ((*p != 0) && (*p != ' '))
+ p++;
+ while ((*p != 0) && ((*p == ' ') && (*(p + 1) != ' ')))
+ p++;
+ if (*p == ' ')
+ p++;
+ break;
+ case KEY_DEL:
+ case KEY_DELETE:
+ q = p;
+ while (*(q + 1)) {
+ *q = *(q + 1);
+ q++;
+ }
+ if (last > str)
+ last--;
+ fudge = 1;
+ break;
+ case KEY_INSERT:
+ insmode = 1 - insmode; // Switch mode
+ if (insmode == 0)
+ setcursorshape(1, 7); // Block cursor
+ else
+ setcursorshape(6, 7); // Normal cursor
+ break;
+ case KEY_BACKSPACE: // Move over by one
+ q = p;
+ while (q <= last) {
+ *(q - 1) = *q;
+ q++;
+ }
+ if (last > str)
+ last--;
+ if (p > str)
+ p--;
+ fudge = 1;
+ break;
+ case KEY_CTRL('U'): /* Ctrl-U: kill input */
+ fudge = last - str;
+ while (p > str)
+ *p-- = 0;
+ p = str;
+ *p = 0;
+ last = str;
+ break;
+ default: // Handle insert and overwrite mode
+ if ((c >= ' ') && (c < 128) &&
+ ((unsigned int)(p - str) < size - 1)) {
+ if (insmode == 0) { // Overwrite mode
+ if (p == last)
+ last++;
+ *last = 0;
+ *p++ = c;
+ } else { // Insert mode
+ if (p == last) { // last char
+ last++;
+ *last = 0;
+ *p++ = c;
+ } else { // Non-last char
+ q = last++;
+ while (q >= p) {
+ *q = *(q - 1);
+ q--;
+ }
+ *p++ = c;
+ }
+ }
+ } else
+ beep();
+ break;
+ }
+ // Now the string has been modified, print it
+ if (password == 0) {
+ gotoxy(row, col);
+ csprint(str, GETSTRATTR);
+ if (fudge > 0)
+ cprint(' ', GETSTRATTR, fudge);
+ gotoxy(row, col + (p - str));
+ }
+ } /* while */
+ *p = '\0';
+ if (password == 0)
+ csprint("\r\n", GETSTRATTR);
+ setcursorshape(start, end); // Block cursor
+ // If user hit ESCAPE so return without any changes
+ if (c != KEY_ESC)
+ strcpy(stra, str);
+ free(str);
+}
+
+//////////////////////////////Box Stuff
+
+// Draw box and lines
+void drawbox(const char top, const char left, const char bot,
+ const char right, const char attr)
+{
+ unsigned char x;
+ putchar(SO);
+ // Top border
+ gotoxy(top, left);
+ putch(TOP_LEFT_CORNER_BORDER, attr);
+ cprint(TOP_BORDER, attr, right - left - 1);
+ putch(TOP_RIGHT_CORNER_BORDER, attr);
+ // Bottom border
+ gotoxy(bot, left);
+ putch(BOTTOM_LEFT_CORNER_BORDER, attr);
+ cprint(BOTTOM_BORDER, attr, right - left - 1);
+ putch(BOTTOM_RIGHT_CORNER_BORDER, attr);
+ // Left & right borders
+ for (x = top + 1; x < bot; x++) {
+ gotoxy(x, left);
+ putch(LEFT_BORDER, attr);
+ gotoxy(x, right);
+ putch(RIGHT_BORDER, attr);
+ }
+ putchar(SI);
+}
+
+void drawhorizline(const char top, const char left, const char right,
+ const char attr, char dumb)
+{
+ unsigned char start, end;
+ if (dumb == 0) {
+ start = left + 1;
+ end = right - 1;
+ } else {
+ start = left;
+ end = right;
+ }
+ gotoxy(top, start);
+ putchar(SO);
+ cprint(MIDDLE_BORDER, attr, end - start + 1);
+ if (dumb == 0) {
+ gotoxy(top, left);
+ putch(MIDDLE_BORDER, attr);
+ gotoxy(top, right);
+ putch(MIDDLE_BORDER, attr);
+ }
+ putchar(SI);
+}
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