Sweden-Number/console/generic.c

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1998-12-02 20:58:08 +01:00
/* generic.c */
/* This is a driver to implement, when possible, "high-level"
routines using only low level calls. This is to make it possible
to have accelerated functions for the individual drivers...
or to simply not bother with them. */
/* When creating new drivers, you need to assign all the functions that
that driver supports into the driver struct. If it is a supplementary
driver, it should make sure to perserve the old values. */
#include <stdio.h>
1998-12-02 20:58:08 +01:00
#include "console.h"
#include "config.h"
#include "debug.h"
void GENERIC_Start()
{
/* Here, we only want to add a driver if there is not one already
defined. */
TRACE(console, "GENERIC_Start\n");
if (!driver.clearWindow)
driver.clearWindow = GENERIC_ClearWindow;
if (!driver.scrollUpWindow)
driver.scrollUpWindow = GENERIC_ScrollUpWindow;
if (!driver.scrollDownWindow)
driver.scrollDownWindow = GENERIC_ScrollDownWindow;
if (!driver.getCharacter)
driver.getCharacter = GENERIC_GetCharacter;
}
void GENERIC_ClearWindow(char row1, char col1, char row2, char col2,
int bg_color, int attribute)
{
char trow, tcol;
char x, y;
int old_refresh;
TRACE(console, "GENERIC_ClearWindow()\n");
/* Abort if we have only partial functionality */
if (!(driver.getCursorPosition && driver.moveCursor && driver.write))
return;
old_refresh = CONSOLE_GetRefresh();
CONSOLE_SetRefresh(FALSE);
CONSOLE_GetCursorPosition(&trow, &tcol);
for (x = row1; x < row2; x++)
{
CONSOLE_MoveCursor(x, col1);
for (y = col1; y < col2; y++)
{
CONSOLE_Write(' ', 0, bg_color, attribute);
}
}
CONSOLE_MoveCursor(trow, tcol);
CONSOLE_SetRefresh(old_refresh);
TRACE(console, "GENERIC_ClearWindow() completed.\n");
}
/* These are in-progress. I just haven't finished them yet... */
void GENERIC_ScrollUpWindow(char row1, char col1, char row2, char col2,
char lines, int bg_color, int attribute)
{
char trow, tcol;
int x, y;
char ch;
int bg, fg, attr;
int old_refresh;
TRACE(console, "GENERIC_ScrollUpWindow()\n");
/* Abort if we have only partial functionality */
if (!(driver.getCursorPosition && driver.moveCursor && driver.write
&& driver.getCharacterAtCursor && driver.clearWindow))
return;
old_refresh = CONSOLE_GetRefresh();
CONSOLE_SetRefresh(FALSE);
CONSOLE_GetCursorPosition(&trow, &tcol);
for (x = row1 + lines; x < row2; x++)
{
for (y = col1; y < col2; y++)
{
CONSOLE_MoveCursor(x, y);
CONSOLE_GetCharacterAtCursor(&ch, &fg, &bg, &attr);
CONSOLE_MoveCursor(x - lines, y);
CONSOLE_Write(ch, fg, bg, attr);
}
}
CONSOLE_ClearWindow(row2 - lines, col1, row2, col2, bg_color,
attribute);
CONSOLE_MoveCursor(trow, tcol);
CONSOLE_SetRefresh(old_refresh);
TRACE(console, "GENERIC_ScrollUpWindow() completed.\n");
}
void GENERIC_ScrollDownWindow(char row1, char col1, char row2, char col2,
char lines, int bg_color, int attribute)
{
char trow, tcol;
int x, y;
char ch;
int bg, fg, attr;
int old_refresh;
TRACE(console, "GENERIC_ScrollDownWindow()\n");
/* Abort if we have only partial functionality */
if (!(driver.getCursorPosition && driver.moveCursor && driver.write
&& driver.getCharacterAtCursor && driver.clearWindow))
return;
old_refresh = CONSOLE_GetRefresh();
CONSOLE_SetRefresh(FALSE);
CONSOLE_GetCursorPosition(&trow, &tcol);
for (x = row2 - lines; x > row1; x--)
{
for (y = col1; y < col2; y++)
{
CONSOLE_MoveCursor(x, y);
CONSOLE_GetCharacterAtCursor(&ch, &fg, &bg, &attr);
CONSOLE_MoveCursor(x + lines, y);
CONSOLE_Write(ch, fg, bg, attr);
}
}
CONSOLE_ClearWindow(row1, col1, row1 + lines, col2, bg_color,
attribute);
CONSOLE_MoveCursor(trow, tcol);
CONSOLE_SetRefresh(old_refresh);
TRACE(console, "GENERIC_ScrollDownWindow() completed.\n");
}
char GENERIC_GetCharacter()
{
/* Keep getting keys until we get one with a char value */
char ch = (char) 0, scan;
while (!ch)
{
CONSOLE_GetKeystroke(&ch, &scan);
}
return ch;
}