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Avoid cursor move on every single character

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This commit is contained in:
Michael Brown 2006-12-19 00:51:32 +00:00
parent 8e460de6be
commit e85bf52446
2 changed files with 22 additions and 4 deletions
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24
src/hci/mucurses/ansi_screen.c
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@ -4,18 +4,25 @@
unsigned short _COLS = 80;
unsigned short _LINES = 25;
static void ansiscr_init ( struct _curses_screen *scr __unused ) {
static void ansiscr_init ( struct _curses_screen *scr ) {
/* Reset terminal attributes and clear screen */
scr->attrs = 0;
scr->curs_x = 0;
scr->curs_y = 0;
printf ( "\033[0m\033[2J" );
}
static void ansiscr_exit ( struct _curses_screen *scr __unused ) {
}
static void ansiscr_movetoyx ( struct _curses_screen *scr __unused,
static void ansiscr_movetoyx ( struct _curses_screen *scr,
unsigned int y, unsigned int x ) {
/* ANSI escape sequence to update cursor position */
printf ( "\033[%d;%dH", ( y + 1 ), ( x + 1 ) );
if ( ( x != scr->curs_x ) || ( y != scr->curs_y ) ) {
/* ANSI escape sequence to update cursor position */
printf ( "\033[%d;%dH", ( y + 1 ), ( x + 1 ) );
scr->curs_x = x;
scr->curs_y = y;
}
}
static void ansiscr_putc ( struct _curses_screen *scr, chtype c ) {
@ -26,13 +33,22 @@ static void ansiscr_putc ( struct _curses_screen *scr, chtype c ) {
short fcol;
short bcol;
/* Update attributes if changed */
if ( attrs != scr->attrs ) {
scr->attrs = attrs;
pair_content ( cpair, &fcol, &bcol );
/* ANSI escape sequence to update character attributes */
printf ( "\033[0;%d;3%d;4%dm", ( bold ? 1 : 22 ), fcol, bcol );
}
/* Print the actual character */
putchar ( character );
/* Update expected cursor position */
if ( ++(scr->curs_x) == _COLS ) {
scr->curs_x = 0;
++scr->curs_y;
}
}
static int ansiscr_getc ( struct _curses_screen *scr __unused ) {

2
src/include/curses.h
View File

@ -28,6 +28,8 @@ typedef uint32_t attr_t;
/** Curses SCREEN object */
typedef struct _curses_screen {
/** Current cursor position */
unsigned int curs_x, curs_y;
/** Current attribute */
attr_t attrs;