Contiki 2.6

ctk-textentry-multiline.c

00001 /*
00002  * Copyright (c) 2002-2003, Adam Dunkels.
00003  * All rights reserved. 
00004  *
00005  * Redistribution and use in source and binary forms, with or without 
00006  * modification, are permitted provided that the following conditions 
00007  * are met: 
00008  * 1. Redistributions of source code must retain the above copyright 
00009  *    notice, this list of conditions and the following disclaimer. 
00010  * 2. Redistributions in binary form must reproduce the above
00011  *    copyright notice, this list of conditions and the following
00012  *    disclaimer in the documentation and/or other materials provided
00013  *    with the distribution. 
00014  * 3. The name of the author may not be used to endorse or promote
00015  *    products derived from this software without specific prior
00016  *    written permission.  
00017  *
00018  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
00019  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00020  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00021  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
00022  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00023  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
00024  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00025  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
00026  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00027  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00028  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
00029  *
00030  * This file is part of the Contiki operating system.
00031  *
00032  * $Id: ctk-textentry-multiline.c,v 1.2 2006/08/21 21:59:59 oliverschmidt Exp $
00033  *
00034  */
00035 
00036 #include <string.h>
00037 
00038 #include "ctk/ctk.h"
00039 
00040 #include "lib/ctk-textentry-multiline.h"
00041 
00042 /*-----------------------------------------------------------------------------------*/
00043 unsigned char
00044 ctk_textentry_multiline_input(ctk_arch_key_t c,
00045                               struct ctk_textentry *t)
00046 {
00047   unsigned char len;
00048 
00049   switch(c) {
00050   case 0:
00051     t->xpos = (unsigned char)strlen(&t->text[t->ypos * (t->len + 1)]);
00052     if(t->xpos == t->len) {
00053       --t->xpos;
00054     }
00055     return 1;
00056 
00057   case CH_CURS_UP:
00058     if(t->ypos == 0) {
00059       t->xpos = 0;
00060       return 1;
00061     }
00062     --t->ypos;
00063     break;
00064 
00065   case CH_CURS_DOWN:
00066     if(t->ypos == t->h - 1) {
00067       t->xpos = (unsigned char)strlen(&t->text[t->ypos * (t->len + 1)]);
00068       if(t->xpos == t->len) {
00069         --t->xpos;
00070       }
00071       return 1;
00072     }
00073     ++t->ypos;
00074     break;
00075 
00076   case CH_ENTER:
00077     if(t->ypos == t->h - 1) {
00078       return 0;
00079     }
00080     ++t->ypos;
00081     t->xpos = 0;
00082     return 1;
00083 
00084   default:
00085     return 0;
00086   }
00087 
00088   len = (unsigned char)strlen(&t->text[t->ypos * (t->len + 1)]);
00089   if(t->xpos > len) {
00090     t->xpos = len;
00091   }
00092   return 1;
00093 }
00094 /*-----------------------------------------------------------------------------------*/