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-rw-r--r--st.c50
1 files changed, 28 insertions, 22 deletions
diff --git a/st.c b/st.c
index 6a51581..6dcded5 100644
--- a/st.c
+++ b/st.c
@@ -46,8 +46,9 @@
/* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
-enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE = 1,
- CURSOR_DRAW = 0, CURSOR_SAVE, CURSOR_LOAD };
+enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
+ CURSOR_SAVE, CURSOR_LOAD };
+enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
@@ -67,7 +68,7 @@ typedef struct {
Glyph attr; /* current char attributes */
int x;
int y;
- char hide;
+ char state;
} TCursor;
/* CSI Escape sequence structs */
@@ -164,7 +165,7 @@ static void xbell(void);
static void xdraws(char *, Glyph, int, int, int);
static void xhints(void);
static void xclear(int, int, int, int);
-static void xcursor(int);
+static void xcursor(void);
static void xinit(void);
static void xloadcols(void);
@@ -329,7 +330,7 @@ treset(void) {
.mode = ATTR_NULL,
.fg = DefaultFG,
.bg = DefaultBG
- }, .x = 0, .y = 0, .hide = 0};
+ }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
term.top = 0, term.bot = term.row - 1;
term.mode = MODE_WRAP;
@@ -414,8 +415,11 @@ csiparse(void) {
void
tmoveto(int x, int y) {
- term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
- term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
+ LIMIT(x, 0, term.col-1);
+ LIMIT(y, 0, term.row-1);
+ term.c.state &= ~CURSOR_WRAPNEXT;
+ term.c.x = x;
+ term.c.y = y;
}
void
@@ -711,7 +715,7 @@ csihandle(void) {
case 12: /* att610 -- Stop blinking cursor (IGNORED) */
break;
case 25:
- term.c.hide = CURSOR_HIDE;
+ term.c.state |= CURSOR_HIDE;
break;
case 1048: /* XXX: no alt. screen to erase/save */
case 1049:
@@ -760,7 +764,7 @@ csihandle(void) {
case 12: /* att610 -- Start blinking cursor (IGNORED) */
break;
case 25:
- term.c.hide = CURSOR_DRAW;
+ term.c.state &= ~CURSOR_HIDE;
break;
case 1048:
case 1049: /* XXX: no alt. screen to erase/save */
@@ -788,6 +792,7 @@ csihandle(void) {
DEFAULT(escseq.arg[0], 1);
DEFAULT(escseq.arg[1], term.row);
tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
+ tmoveto(0, 0);
}
break;
case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
@@ -932,11 +937,13 @@ tputc(char c) {
term.esc = ESC_START;
break;
default:
+ if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
+ tnewline();
tsetchar(c);
- if(term.c.x+1 < term.col) {
+ if(term.c.x+1 < term.col)
tmoveto(term.c.x+1, term.c.y);
- } else if(IS_SET(MODE_WRAP))
- tnewline();
+ else
+ term.c.state |= CURSOR_WRAPNEXT;
break;
}
}
@@ -974,13 +981,12 @@ tresize(int col, int row) {
for(/* i == minrow */; i < row; i++)
term.line[i] = calloc(col, sizeof(Glyph));
- LIMIT(term.c.x, 0, col-1);
- LIMIT(term.c.y, 0, row-1);
- LIMIT(term.top, 0, row-1);
- LIMIT(term.bot, 0, row-1);
-
- term.bot = row-1;
+ /* update terminal size */
term.col = col, term.row = row;
+ /* make use of the LIMIT in tmoveto */
+ tmoveto(term.c.x, term.c.y);
+ /* reset scrolling region */
+ tsetscroll(0, row-1);
}
void
@@ -1112,7 +1118,7 @@ xdraws(char *s, Glyph base, int x, int y, int len) {
}
void
-xcursor(int mode) {
+xcursor(void) {
static int oldx = 0;
static int oldy = 0;
Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
@@ -1130,7 +1136,7 @@ xcursor(int mode) {
xclear(oldx, oldy, oldx, oldy);
/* draw the new one */
- if(mode == CURSOR_DRAW) {
+ if(!(term.c.state & CURSOR_HIDE)) {
xdraws(&g.c, g, term.c.x, term.c.y, 1);
oldx = term.c.x, oldy = term.c.y;
}
@@ -1157,7 +1163,7 @@ draw(int dummy) {
if(term.line[y][x].state & GLYPH_SET)
xdrawc(x, y, term.line[y][x]);
- xcursor(term.c.hide);
+ xcursor();
XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
XFlush(xw.dis);
}
@@ -1193,7 +1199,7 @@ draw(int redraw_all) {
if(i > 0)
xdraws(buf, base, ox, y, i);
}
- xcursor(term.c.hide);
+ xcursor();
XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
XFlush(xw.dis);
}