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Add DECOM sequence

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DECOM sequence allows to the user defines a new home position. The home
position is used as base for all the movement commands except HVP and
VPA. It is important notice than DECSLM moves cursor to absolute position
0,0.
---
 st.c |   33 ++++++++++++++++++++++++++-------
 1 file changed, 26 insertions(+), 7 deletions(-)
This commit is contained in:
Roberto E. Vargas Caballero 2012-11-08 17:21:10 +01:00
parent ee3e0a9fd0
commit 5260a9ea22
1 changed files with 26 additions and 7 deletions
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33
st.c
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@ -97,6 +97,7 @@ enum cursor_movement {
enum cursor_state { enum cursor_state {
CURSOR_DEFAULT = 0, CURSOR_DEFAULT = 0,
CURSOR_WRAPNEXT = 1, CURSOR_WRAPNEXT = 1,
CURSOR_ORIGIN = 2
}; };
enum glyph_state { enum glyph_state {
@ -300,6 +301,7 @@ static void tdeleteline(int);
static void tinsertblank(int); static void tinsertblank(int);
static void tinsertblankline(int); static void tinsertblankline(int);
static void tmoveto(int, int); static void tmoveto(int, int);
static void tmoveato(int x, int y);
static void tnew(int, int); static void tnew(int, int);
static void tnewline(int); static void tnewline(int);
static void tputtab(bool); static void tputtab(bool);
@ -1211,10 +1213,25 @@ csiparse(void) {
} }
} }
/* for absolute user moves, when decom is set */
void
tmoveato(int x, int y) {
tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
}
void void
tmoveto(int x, int y) { tmoveto(int x, int y) {
int miny, maxy;
if(term.c.state & CURSOR_ORIGIN) {
miny = term.top;
maxy = term.bot;
} else {
miny = 0;
maxy = term.row - 1;
}
LIMIT(x, 0, term.col-1); LIMIT(x, 0, term.col-1);
LIMIT(y, 0, term.row-1); LIMIT(y, miny, maxy);
term.c.state &= ~CURSOR_WRAPNEXT; term.c.state &= ~CURSOR_WRAPNEXT;
term.c.x = x; term.c.x = x;
term.c.y = y; term.c.y = y;
@ -1456,7 +1473,9 @@ tsetmode(bool priv, bool set, int *args, int narg) {
if(mode != term.mode) if(mode != term.mode)
redraw(); redraw();
break; break;
case 6: /* XXX: DECOM -- Origin */ case 6: /* DECOM -- Origin */
MODBIT(term.c.state, set, CURSOR_ORIGIN);
tmoveato(0, 0);
break; break;
case 7: /* DECAWM -- Auto wrap */ case 7: /* DECAWM -- Auto wrap */
MODBIT(term.mode, set, MODE_WRAP); MODBIT(term.mode, set, MODE_WRAP);
@ -1593,7 +1612,7 @@ csihandle(void) {
case 'f': /* HVP */ case 'f': /* HVP */
DEFAULT(csiescseq.arg[0], 1); DEFAULT(csiescseq.arg[0], 1);
DEFAULT(csiescseq.arg[1], 1); DEFAULT(csiescseq.arg[1], 1);
tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1); tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
break; break;
case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */ case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
DEFAULT(csiescseq.arg[0], 1); DEFAULT(csiescseq.arg[0], 1);
@ -1667,7 +1686,7 @@ csihandle(void) {
break; break;
case 'd': /* VPA -- Move to <row> */ case 'd': /* VPA -- Move to <row> */
DEFAULT(csiescseq.arg[0], 1); DEFAULT(csiescseq.arg[0], 1);
tmoveto(term.c.x, csiescseq.arg[0]-1); tmoveato(term.c.x, csiescseq.arg[0]-1);
break; break;
case 'h': /* SM -- Set terminal mode */ case 'h': /* SM -- Set terminal mode */
tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg); tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
@ -1682,7 +1701,7 @@ csihandle(void) {
DEFAULT(csiescseq.arg[0], 1); DEFAULT(csiescseq.arg[0], 1);
DEFAULT(csiescseq.arg[1], term.row); DEFAULT(csiescseq.arg[1], term.row);
tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1); tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
tmoveto(0, 0); tmoveato(0, 0);
} }
break; break;
case 's': /* DECSC -- Save cursor position (ANSI.SYS) */ case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
@ -2119,10 +2138,10 @@ tresize(int col, int row) {
/* update terminal size */ /* update terminal size */
term.col = col; term.col = col;
term.row = row; term.row = row;
/* make use of the LIMIT in tmoveto */
tmoveto(term.c.x, term.c.y);
/* reset scrolling region */ /* reset scrolling region */
tsetscroll(0, row-1); tsetscroll(0, row-1);
/* make use of the LIMIT in tmoveto */
tmoveto(term.c.x, term.c.y);
return (slide > 0); return (slide > 0);
} }