osd-contiki/core/lib/ctk-textentry-multiline.c

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/*
* Copyright (c) 2002-2003, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*
*/
#include <string.h>
#include "ctk/ctk.h"
#include "lib/ctk-textentry-multiline.h"
/*-----------------------------------------------------------------------------------*/
unsigned char
ctk_textentry_multiline_input(ctk_arch_key_t c,
struct ctk_textentry *t)
{
unsigned char len;
switch(c) {
case 0:
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t->xpos = (unsigned char)strlen(&t->text[t->ypos * (t->len + 1)]);
if(t->xpos == t->len) {
--t->xpos;
}
return 1;
case CH_CURS_UP:
if(t->ypos == 0) {
t->xpos = 0;
return 1;
}
--t->ypos;
break;
case CH_CURS_DOWN:
if(t->ypos == t->h - 1) {
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t->xpos = (unsigned char)strlen(&t->text[t->ypos * (t->len + 1)]);
if(t->xpos == t->len) {
--t->xpos;
}
return 1;
}
++t->ypos;
break;
case CH_ENTER:
if(t->ypos == t->h - 1) {
return 0;
}
++t->ypos;
t->xpos = 0;
return 1;
default:
return 0;
}
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len = (unsigned char)strlen(&t->text[t->ypos * (t->len + 1)]);
if(t->xpos > len) {
t->xpos = len;
}
return 1;
}
/*-----------------------------------------------------------------------------------*/