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Implementing Back Color Erase (BCE).

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This commit is contained in:
Christoph Lohmann 2013-01-20 14:54:35 +01:00
parent b4b513c791
commit b78c5085f7
2 changed files with 40 additions and 25 deletions
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61
st.c
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@ -152,7 +152,7 @@ typedef struct {
uchar state; /* state flags */
} Glyph;
typedef Glyph* Line;
typedef Glyph *Line;
typedef struct {
Glyph attr; /* current char attributes */
@ -303,7 +303,7 @@ static void strhandle(void);
static void strparse(void);
static void strreset(void);
static void tclearregion(int, int, int, int);
static void tclearregion(int, int, int, int, int);
static void tcursor(int);
static void tdeletechar(int);
static void tdeleteline(int);
@ -1113,7 +1113,7 @@ treset(void) {
term.bot = term.row - 1;
term.mode = MODE_WRAP;
tclearregion(0, 0, term.col-1, term.row-1);
tclearregion(0, 0, term.col-1, term.row-1, 0);
tmoveto(0, 0);
tcursor(CURSOR_SAVE);
}
@ -1157,7 +1157,7 @@ tscrolldown(int orig, int n) {
LIMIT(n, 0, term.bot-orig+1);
tclearregion(0, term.bot-n+1, term.col-1, term.bot);
tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
for(i = term.bot; i >= orig+n; i--) {
temp = term.line[i];
@ -1177,7 +1177,7 @@ tscrollup(int orig, int n) {
Line temp;
LIMIT(n, 0, term.bot-orig+1);
tclearregion(0, orig, term.col-1, orig+n-1);
tclearregion(0, orig, term.col-1, orig+n-1, 0);
for(i = orig; i <= term.bot-n; i++) {
temp = term.line[i];
@ -1305,7 +1305,7 @@ tsetchar(char *c, Glyph *attr, int x, int y) {
}
void
tclearregion(int x1, int y1, int x2, int y2) {
tclearregion(int x1, int y1, int x2, int y2, int bce) {
int x, y, temp;
if(x1 > x2)
@ -1320,9 +1320,16 @@ tclearregion(int x1, int y1, int x2, int y2) {
for(y = y1; y <= y2; y++) {
term.dirty[y] = 1;
for(x = x1; x <= x2; x++)
for(x = x1; x <= x2; x++) {
if(bce) {
term.line[y][x] = term.c.attr;
memcpy(term.line[y][x].c, " ", 2);
term.line[y][x].state |= GLYPH_SET;
} else {
term.line[y][x].state = 0;
}
}
}
}
void
@ -1334,13 +1341,13 @@ tdeletechar(int n) {
term.dirty[term.c.y] = 1;
if(src >= term.col) {
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
return;
}
memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
size * sizeof(Glyph));
tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
}
void
@ -1352,13 +1359,13 @@ tinsertblank(int n) {
term.dirty[term.c.y] = 1;
if(dst >= term.col) {
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
return;
}
memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
size * sizeof(Glyph));
tclearregion(src, term.c.y, dst - 1, term.c.y);
tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
}
void
@ -1542,8 +1549,10 @@ tsetmode(bool priv, bool set, int *args, int narg) {
case 47:
case 1047: {
alt = IS_SET(MODE_ALTSCREEN);
if(alt)
tclearregion(0, 0, term.col-1, term.row-1);
if(alt) {
tclearregion(0, 0, term.col-1,
term.row-1, 0);
}
if(set ^ alt) /* set is always 1 or 0 */
tswapscreen();
if(*args != 1049)
@ -1662,17 +1671,19 @@ csihandle(void) {
sel.bx = -1;
switch(csiescseq.arg[0]) {
case 0: /* below */
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
if(term.c.y < term.row-1)
tclearregion(0, term.c.y+1, term.col-1, term.row-1);
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
if(term.c.y < term.row-1) {
tclearregion(0, term.c.y+1, term.col-1,
term.row-1, 1);
}
break;
case 1: /* above */
if(term.c.y > 1)
tclearregion(0, 0, term.col-1, term.c.y-1);
tclearregion(0, term.c.y, term.c.x, term.c.y);
tclearregion(0, 0, term.col-1, term.c.y-1, 1);
tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
break;
case 2: /* all */
tclearregion(0, 0, term.col-1, term.row-1);
tclearregion(0, 0, term.col-1, term.row-1, 1);
break;
default:
goto unknown;
@ -1681,13 +1692,14 @@ csihandle(void) {
case 'K': /* EL -- Clear line */
switch(csiescseq.arg[0]) {
case 0: /* right */
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
tclearregion(term.c.x, term.c.y, term.col-1,
term.c.y, 1);
break;
case 1: /* left */
tclearregion(0, term.c.y, term.c.x, term.c.y);
tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
break;
case 2: /* all */
tclearregion(0, term.c.y, term.col-1, term.c.y);
tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
break;
}
break;
@ -1712,7 +1724,8 @@ csihandle(void) {
break;
case 'X': /* ECH -- Erase <n> char */
DEFAULT(csiescseq.arg[0], 1);
tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0],
term.c.y, 0);
break;
case 'P': /* DCH -- Delete <n> char */
DEFAULT(csiescseq.arg[0], 1);
@ -2505,6 +2518,7 @@ xinit(void) {
xw.fy = 0;
}
/* Events */
attrs.background_pixel = dc.col[defaultbg].pixel;
attrs.border_pixel = dc.col[defaultbg].pixel;
attrs.bit_gravity = NorthWestGravity;
@ -2898,6 +2912,7 @@ drawregion(int x1, int y1, int x2, int y2) {
ox = x;
base = new;
}
sl = utf8size(new.c);
memcpy(buf+ib, new.c, sl);
ib += sl;

2
st.info
View file

@ -3,7 +3,7 @@
st| simpleterm,
acsc=``aaffggiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~,
am,
# bce,
bce,
bel=^G,
# blink=\E[5m,
bold=\E[1m,