static void erase_line(int mode)
{
COORD start;
start.Y = console->y + console->top;
int count;
if (mode == 0)
{
/* Erase to end */
start.X = console->x;
count = console->width - console->x;
}
else if (mode == 1)
{
/* Erase to begin */
start.X = 0;
count = console->x + 1;
}
else if (mode == 2)
{
/* Erase whole line */
start.X = 0;
count = console->width;
}
else
{
log_error("erase_line(): Invalid mode %d\n", mode);
return;
}
DWORD num_written;
FillConsoleOutputAttribute(console->out, get_text_attribute(console), count, start, &num_written);
FillConsoleOutputCharacterW(console->out, L' ', count, start, &num_written);
}
static void erase_screen(int mode)
{
COORD start;
int count;
if (mode == 0)
{
/* Erase current line to bottom */
start.X = console->x;
start.Y = console->y + console->top;
count = (console->width - console->x + 1) + (console->height - console->y - 1) * console->width;
}
else if (mode == 1)
{
/* Erase top to current line */
start.X = 0;
start.Y = console->top;
count = console->y * console->width + console->x + 1;
}
else if (mode == 2)
{
/* Erase entire screen */
start.X = 0;
start.Y = console->top;
count = console->width * console->height;
}
else
{
log_error("erase_screen(): Invalid mode %d\n", mode);
return;
}
DWORD num_written;
FillConsoleOutputAttribute(console->out, get_text_attribute(console), count, start, &num_written);
FillConsoleOutputCharacterW(console->out, L' ', count, start, &num_written);
}
void console_clear(){
// Note that we must use short for the pointer so that we can
// use memsetw.
uint32_t i=0;
// empty text with white text.
uint16_t blankCell = get_text_value(' ', WHITE, BLACK);
for (i = 0; i < SCREEN_ROWS; i++)
memsetw(video_memory + (i * SCREEN_COLUMNS), blankCell, SCREEN_COLUMNS);
// Clear current console options
main_console.attributes = get_text_attribute(WHITE, BLACK);
main_console.x = 0;
main_console.y = 0;
update_cursor();
}
static void restore_cursor()
{
console->x = console->saved_cursor.x;
console->y = console->saved_cursor.y;
console->at_right_margin = console->saved_cursor.at_right_margin;
console->bright = console->saved_cursor.bright;
console->reverse = console->saved_cursor.reverse;
console->foreground = console->saved_cursor.foreground;
console->background = console->saved_cursor.background;
console->charset = console->saved_cursor.charset;
console->origin_mode = console->saved_cursor.origin_mode;
console->wraparound_mode = console->saved_cursor.wraparound_mode;
console->top = console->saved_top;
set_pos(console->x, console->y);
SetConsoleTextAttribute(console->out, get_text_attribute());
}
static void control_escape_sharp(char ch)
{
switch (ch)
{
case '8':
{
/* DECALN: DEC screen alignment test */
/* Fill screen with 'E' */
COORD start;
start.X = 0;
start.Y = 0;
DWORD bytes_written;
FillConsoleOutputAttribute(console->out, get_text_attribute(), console->width * console->height, start, &bytes_written);
FillConsoleOutputCharacterW(console->out, L'E', console->width * console->height, start, &bytes_written);
console->processor = NULL;
}
default:
log_error("control_escape_sharp(): Unhandled character %c\n", ch);
console->processor = NULL;
}
}
/* Handler for control sequencie introducer, "ESC [" */
static void control_escape_csi(char ch)
{
switch (ch)
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
console->params[console->param_count] = 10 * console->params[console->param_count] + (ch - '0');
break;
case ';':
if (console->param_count + 1 == CONSOLE_MAX_PARAMS)
log_error("Too many console parameters.\n");
else
console->param_count++;
break;
case 'A': /* CUU */
move_up(console->params[0]? console->params[0]: 1);
console->processor = NULL;
break;
case 'B': /* CUD */
case 'e': /* VPR */
move_down(console->params[0]? console->params[0]: 1);
console->processor = NULL;
break;
case 'C': /* CUF */
case 'a': /* HPR */
move_right(console->params[0]? console->params[0]: 1);
console->processor = NULL;
break;
case 'D': /* CUB */
move_left(console->params[0]? console->params[0]: 1);
console->processor = NULL;
break;
case 'd': /* VPA */
{
int y = console->params[0]? console->params[0]: 1;
if (y > console->height)
y = console->height;
set_pos(console->x, y - 1);
console->processor = NULL;
break;
}
case 'G': /* CHA */
case '`': /* HPA */
{
int x = console->params[0] ? console->params[0] : 1;
if (x > console->width)
x = console->width;
set_pos(x - 1, console->y);
console->processor = NULL;
break;
}
case 'H':
case 'f':
/* Zero or one both represents the first row/column */
if (console->params[0] > 0)
console->params[0]--;
if (console->params[1] > 0)
console->params[1]--;
if (console->origin_mode)
set_pos(console->params[1], console->scroll_top + console->params[0]);
else
set_pos(console->params[1], console->params[0]);
console->processor = NULL;
break;
case 'h':
if (console->private_mode)
change_private_mode(console->params[0], 1);
else
change_mode(console->params[0], 1);
console->processor = NULL;
break;
case 'J':
erase_screen(console->params[0]);
console->processor = NULL;
break;
case 'K':
erase_line(console->params[0]);
console->processor = NULL;
break;
case 'l':
if (console->private_mode)
change_private_mode(console->params[0], 0);
else
change_mode(console->params[0], 0);
console->processor = NULL;
break;
case 'L': /* IL */
insert_line(console->params[0]? console->params[0]: 1);
console->processor = NULL;
break;
case 'M': /* DL */
delete_line(console->params[0]? console->params[0]: 1);
console->processor = NULL;
break;
case '@': /* ICH */
insert_character(console->params[0]? console->params[0]: 1);
console->processor = NULL;
break;
case 'P': /* DCH */
delete_character(console->params[0]? console->params[0]: 1);
console->processor = NULL;
break;
case 'm':
for (int i = 0; i <= console->param_count; i++)
{
switch (console->params[i])
{
case 0: /* Reset */
console->bright = 0;
console->reverse = 0;
console->foreground = 7;
console->background = 0;
break;
case 1:
console->bright = 1;
break;
case 2:
console->bright = 0;
break;
case 7:
console->reverse = 1;
break;
case 27:
console->reverse = 0;
break;
case 30:
case 31:
case 32:
case 33:
case 34:
case 35:
case 36:
case 37:
console->foreground = console->params[i] - 30;
break;
case 40:
case 41:
case 42:
case 43:
case 44:
case 45:
case 46:
case 47:
console->background = console->params[i] - 40;
break;
default:
log_error("Unknown console attribute: %d\n", console->params[i]);
}
}
/* Set updated text attribute */
SetConsoleTextAttribute(console->out, get_text_attribute(console));
console->processor = NULL;
break;
case 'r':
if (console->params[0] == 0)
console->params[0] = 1;
if (console->params[1] == 0)
console->params[1] = console->height;
console->scroll_full_screen = (console->params[0] == 1 && console->params[1] == console->height);
console->scroll_top = console->params[0] - 1;
console->scroll_bottom = console->params[1] - 1;
set_pos(0, 0);
console->processor = NULL;
break;
case 'S': /* SU */
scroll_up(console->params[0]? console->params[0]: 1);
console->processor = NULL;
break;
case '?':
console->private_mode = 1;
break;
default:
log_error("control_escape_csi(): Unhandled character %c\n", ch);
console->processor = NULL;
}
}
/*
* This updates the current text color and background color of the console.
*/
void console_set_text_color(uint8_t foreground, uint8_t background){
main_console.attributes = get_text_attribute(foreground, background);
}
/*
* Calculates the 16-bit value of a character, foreground and background.
*/
uint16_t get_text_value(uint8_t character, uint8_t foreground, uint8_t background){
return character | (get_text_attribute(foreground, background) << 8);
}