commit c58950f2efd8f203e72add7b22e7f5b973c09a7d
parent 91fa81dbac4f09de234921cdf5afacb8c8295919
Author: Christoph Lohmann <20h@r-36.net>
Date: Thu, 30 Aug 2012 21:17:54 +0200
Applying the CBT patch of Roberto Vargas. Thanks.
Diffstat:
| M | st.c | | | 59 | ++++++++++++++++++++++++++++++++++++----------------------- |
1 file changed, 36 insertions(+), 23 deletions(-)
diff --git a/st.c b/st.c
@@ -97,11 +97,11 @@ enum glyph_state {
};
enum term_mode {
- MODE_WRAP = 1,
+ MODE_WRAP = 1,
MODE_INSERT = 2,
MODE_APPKEYPAD = 4,
MODE_ALTSCREEN = 8,
- MODE_CRLF = 16,
+ MODE_CRLF = 16,
MODE_MOUSEBTN = 32,
MODE_MOUSEMOTION = 64,
MODE_MOUSE = 32|64,
@@ -110,8 +110,8 @@ enum term_mode {
enum escape_state {
ESC_START = 1,
- ESC_CSI = 2,
- ESC_STR = 4, /* DSC, OSC, PM, APC */
+ ESC_CSI = 2,
+ ESC_STR = 4, /* DSC, OSC, PM, APC */
ESC_ALTCHARSET = 8,
ESC_STR_END = 16, /* a final string was encountered */
};
@@ -152,21 +152,21 @@ typedef struct {
/* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
typedef struct {
char buf[ESC_BUF_SIZ]; /* raw string */
- int len; /* raw string length */
+ int len; /* raw string length */
char priv;
int arg[ESC_ARG_SIZ];
- int narg; /* nb of args */
+ int narg; /* nb of args */
char mode;
} CSIEscape;
/* STR Escape sequence structs */
/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
typedef struct {
- char type; /* ESC type ... */
+ char type; /* ESC type ... */
char buf[STR_BUF_SIZ]; /* raw string */
- int len; /* raw string length */
+ int len; /* raw string length */
char *args[STR_ARG_SIZ];
- int narg; /* nb of args */
+ int narg; /* nb of args */
} STREscape;
/* Internal representation of the screen */
@@ -262,7 +262,7 @@ static void tinsertblankline(int);
static void tmoveto(int, int);
static void tnew(int, int);
static void tnewline(int);
-static void tputtab(void);
+static void tputtab(bool);
static void tputc(char*);
static void treset(void);
static int tresize(int, int);
@@ -1243,7 +1243,7 @@ csihandle(void) {
case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
DEFAULT(csiescseq.arg[0], 1);
while (csiescseq.arg[0]--)
- tputtab();
+ tputtab(1);
break;
case 'J': /* ED -- Clear screen */
sel.bx = -1;
@@ -1356,7 +1356,11 @@ csihandle(void) {
DEFAULT(csiescseq.arg[0], 1);
tdeletechar(csiescseq.arg[0]);
break;
- /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
+ case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
+ DEFAULT(csiescseq.arg[0], 1);
+ while (csiescseq.arg[0]--)
+ tputtab(0);
+ break;
case 'd': /* VPA -- Move to <row> */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(term.c.x, csiescseq.arg[0]-1);
@@ -1528,11 +1532,20 @@ strreset(void) {
}
void
-tputtab(void) {
- unsigned x;
+tputtab(bool forward) {
+ unsigned x = term.c.x;
- for (x = term.c.x + 1; x < term.col && !term.tabs[x]; ++x)
- /* nothing */ ;
+ if (forward) {
+ if (x == term.col)
+ return;
+ for (++x; x < term.col && !term.tabs[x]; ++x)
+ /* nothing */ ;
+ } else {
+ if (x == 0)
+ return;
+ for (--x; x > 0 && !term.tabs[x]; --x)
+ /* nothing */ ;
+ }
tmoveto(x, term.c.y);
}
@@ -1650,7 +1663,7 @@ tputc(char *c) {
sel.bx = -1;
switch(ascii) {
case '\t':
- tputtab();
+ tputtab(1);
break;
case '\b':
tmoveto(term.c.x-1, term.c.y);
@@ -1806,8 +1819,8 @@ void
xclear(int x1, int y1, int x2, int y2) {
XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
XFillRectangle(xw.dpy, xw.buf, dc.gc,
- BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
- (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
+ BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
+ (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
}
void
@@ -1982,8 +1995,8 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
/* copy buffer pixmap to screen pixmap */
void
xcopy() {
- XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
- XdbeSwapBuffers(xw.dpy, swpinfo, 1);
+ XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
+ XdbeSwapBuffers(xw.dpy, swpinfo, 1);
}
@@ -2080,8 +2093,8 @@ expose(XEvent *ev) {
if(xw.state & WIN_REDRAW) {
if(!e->count)
xw.state &= ~WIN_REDRAW;
- }
- xcopy();
+ }
+ xcopy();
}
void
