nuttx-apps/system/termcurses/termcurses.c

282 lines
7.6 KiB
C
Raw Normal View History

/************************************************************************************
* apps/system/termcurses/termcurses.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#include <debug.h>
#include "tcurses_priv.h"
/************************************************************************************
* Private Data
************************************************************************************/
static struct termcurses_dev_s *g_termcurses_devices[] =
{
#ifdef CONFIG_SYSTEM_TERMCURSES_VT100
&g_vt100_tcurs,
#endif
NULL
};
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: termcurses_initterm
*
* Description:
* Allocate and initialize a termcurses_s context based on the provided
* term_type string. If the string is NULL, defaults to "vt100".
*
************************************************************************************/
int termcurses_initterm(FAR const char *term_type, int in_fd, int out_fd,
FAR struct termcurses_s **dev)
{
FAR struct termcurses_dev_s *pnext;
int c;
/* Set term_type if NULL provided */
if (term_type == NULL)
{
/* Check the "TERM" env variable */
term_type = getenv("TERM");
if (term_type == NULL)
{
/* Default to vt100 as a last resort */
term_type = (FAR const char *) "vt100";
}
}
/* Find the selected term_type in the list of registered handlers */
c = 0;
pnext = g_termcurses_devices[c];
while (pnext != NULL)
{
/* Test if this item matches the selected term_type */
if (strstr(pnext->name, term_type) != NULL)
{
/* Allocate a new structure for this termcurses */
if (*dev == NULL)
{
/* Call the termcurses_dev init function */
*dev = pnext->ops->init(in_fd, out_fd);
}
return OK;
}
/* No match. Check next item in linked list */
pnext = g_termcurses_devices[++c];
}
/* Not found! */
*dev = NULL;
return -ENOSYS;
}
/************************************************************************************
* Name: termcurses_deinitterm
*
* Description:
* Free all space for the termcurses terminal and perform any specific
* de-initialization tasks.
*
************************************************************************************/
int termcurses_deinitterm(FAR struct termcurses_s *dev)
{
struct termcurses_colors_s colors;
/* Ensure terminal has default color scheme */
colors.fg_red = 255;
colors.fg_green = 255;
colors.fg_blue = 255;
colors.bg_red = 0;
colors.bg_green = 0;
colors.bg_blue = 0;
colors.color_mask = 0xff;
termcurses_setcolors(dev, &colors);
/* For now, simply free the memory */
free(dev);
return OK;
}
/************************************************************************************
* Name: termcurses_moveyx
*
* Description:
* Move to location yx (row,col) on terminal
*
************************************************************************************/
int termcurses_moveyx(FAR struct termcurses_s *term, int row, int col)
{
FAR struct termcurses_dev_s *dev = (FAR struct termcurses_dev_s *) term;
/* Call the dev function */
if (dev->ops->move)
{
return dev->ops->move(term, TCURS_MOVE_YX, col, row);
}
return -ENOSYS;
}
/************************************************************************************
* Name: termcurses_setcolors
*
* Description:
* Configure output text to render in the specified fg/bg colors.
*
************************************************************************************/
int termcurses_setcolors(FAR struct termcurses_s *term,
FAR struct termcurses_colors_s *colors)
{
FAR struct termcurses_dev_s *dev = (FAR struct termcurses_dev_s *) term;
/* Call the dev function */
if (dev->ops->setcolors)
{
return dev->ops->setcolors(term, colors);
}
return -ENOSYS;
}
/************************************************************************************
* Name: termcurses_setattribute
*
* Description:
* Configure output text to render in the specified fg/bg colors.
*
************************************************************************************/
int termcurses_setattribute(FAR struct termcurses_s *term, unsigned long attrib)
{
FAR struct termcurses_dev_s *dev = (FAR struct termcurses_dev_s *) term;
/* Call the dev function */
if (dev->ops->setattrib)
{
return dev->ops->setattrib(term, attrib);
}
return -ENOSYS;
}
/************************************************************************************
* Name: termcurses_getwinsize
*
* Description:
* Get size of terminal screen in terms of character rows and cols.
*
************************************************************************************/
int termcurses_getwinsize(FAR struct termcurses_s *term, FAR struct winsize *winsz)
{
FAR struct termcurses_dev_s *dev = (FAR struct termcurses_dev_s *) term;
/* Call the dev function */
if (dev->ops->getwinsize)
{
return dev->ops->getwinsize(term, winsz);
}
return -ENOSYS;
}
/************************************************************************************
* Name: termcurses_getkeycode
*
* Description:
* Get a translated key code from the terminal input.
*
************************************************************************************/
int termcurses_getkeycode(FAR struct termcurses_s *term, FAR int *specialkey,
int *keymodifiers)
{
FAR struct termcurses_dev_s *dev = (FAR struct termcurses_dev_s *) term;
/* Call the dev function */
if (dev->ops->getkeycode)
{
return dev->ops->getkeycode(term, specialkey, keymodifiers);
}
return -1;
}
/************************************************************************************
* Name: termcurses_checkkey
*
* Description:
* Check if there is a key waiting to be processed.
*
************************************************************************************/
bool termcurses_checkkey(FAR struct termcurses_s *term)
{
FAR struct termcurses_dev_s *dev = (FAR struct termcurses_dev_s *) term;
/* Call the dev function */
if (dev->ops->checkkey)
{
return dev->ops->checkkey(term);
}
return 0;
}