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/****************************************************************************
* nuttx/graphics/nxconsole/nxcon_putc.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/ascii.h>
#include "nxcon_internal.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxcon_putc
*
* Description:
* Render the specified character at the current display position.
*
****************************************************************************/
void nxcon_putc(FAR struct nxcon_state_s *priv, uint8_t ch)
{
FAR const struct nxcon_bitmap_s *bm;
int lineheight;
/* Ignore carriage returns */
if (ch == '\r')
{
return;
}
/* Handle backspace (treating both BS and DEL as backspace) */
if (ch == ASCII_BS || ch == ASCII_DEL)
{
nxcon_backspace(priv);
return;
}
/* Will another character fit on this line? */
if (priv->fpos.x + priv->fwidth > priv->wndo.wsize.w)
{
#ifndef CONFIG_NXCONSOLE_NOWRAP
/* No.. move to the next line */
nxcon_newline(priv);
/* If we were about to output a newline character, then don't */
if (ch == '\n')
{
return;
}
#else
/* No.. Ignore all further characters until a newline is encountered */
if (ch != '\n')
{
return;
}
#endif
}
/* If it is a newline character, then just perform the logical newline
* operation.
*/
if (ch == '\n')
{
nxcon_newline(priv);
return;
}
/* Check if we need to scroll up */
lineheight = (priv->fheight + CONFIG_NXCONSOLE_LINESEPARATION);
while (priv->fpos.y >= priv->wndo.wsize.h - lineheight)
{
nxcon_scroll(priv, lineheight);
}
/* Find the glyph associated with the character and render it onto the
* display.
*/
bm = nxcon_addchar(priv->font, priv, ch);
if (bm)
{
nxcon_fillchar(priv, NULL, bm);
}
}
/****************************************************************************
* Name: nxcon_showcursor
*
* Description:
* Render the cursor character at the current display position.
*
****************************************************************************/
void nxcon_showcursor(FAR struct nxcon_state_s *priv)
{
int lineheight;
/* Will another character fit on this line? */
if (priv->fpos.x + priv->fwidth > priv->wndo.wsize.w)
{
#ifndef CONFIG_NXCONSOLE_NOWRAP
/* No.. move to the next line */
nxcon_newline(priv);
#else
return;
#endif
}
/* Check if we need to scroll up */
lineheight = (priv->fheight + CONFIG_NXCONSOLE_LINESEPARATION);
while (priv->fpos.y >= priv->wndo.wsize.h - lineheight)
{
nxcon_scroll(priv, lineheight);
}
/* Render the cursor glyph onto the display. */
priv->cursor.pos.x = priv->fpos.x;
priv->cursor.pos.y = priv->fpos.y;
nxcon_fillchar(priv, NULL, &priv->cursor);
}
/****************************************************************************
* Name: nxcon_hidecursor
*
* Description:
* Render the cursor cursor character from the display.
*
****************************************************************************/
void nxcon_hidecursor(FAR struct nxcon_state_s *priv)
{
(void)nxcon_hidechar(priv, &priv->cursor);
}
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