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Fixing an out-of-bound bug in the selection code. Thanks Szabolczs Nagy!

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This commit is contained in:
Christoph Lohmann 2012-11-03 03:24:22 +01:00
parent 091ae143ce
commit abe85c0e99
2 changed files with 24 additions and 9 deletions
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2
config.def.h
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@ -2,7 +2,7 @@
/* appearance */
static char font[] = "Liberation Mono:pixelsize=12:antialias=false:autohint=false";
static unsigned int borderpx = 2;
static int borderpx = 2;
static char shell[] = "/bin/sh";
/* double-click timeout (in milliseconds) between clicks for selection */

31
st.c
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@ -72,8 +72,6 @@
#define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
#define IS_SET(flag) (term.mode & (flag))
#define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
#define X2COL(x) (((x) - borderpx)/xw.cw)
#define Y2ROW(y) (((y) - borderpx)/xw.ch)
#define VT102ID "\033[?6c"
@ -582,6 +580,22 @@ selinit(void) {
sel.xtarget = XA_STRING;
}
static int
x2col(int x) {
x -= borderpx;
x /= xw.cw;
return LIMIT(x, 0, term.col-1);
}
static int
y2row(int y) {
y -= borderpx;
y /= xw.ch;
return LIMIT(y, 0, term.row-1);
}
static inline bool
selected(int x, int y) {
int bx, ex;
@ -603,8 +617,9 @@ getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
if(b)
*b = e->xbutton.button;
*x = X2COL(e->xbutton.x);
*y = Y2ROW(e->xbutton.y);
*x = x2col(e->xbutton.x);
*y = y2row(e->xbutton.y);
sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
sel.b.y = MIN(sel.by, sel.ey);
sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
@ -613,8 +628,8 @@ getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
void
mousereport(XEvent *e) {
int x = X2COL(e->xbutton.x);
int y = Y2ROW(e->xbutton.y);
int x = x2col(e->xbutton.x);
int y = y2row(e->xbutton.y);
int button = e->xbutton.button;
int state = e->xbutton.state;
char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
@ -656,8 +671,8 @@ bpress(XEvent *e) {
draw();
}
sel.mode = 1;
sel.ex = sel.bx = X2COL(e->xbutton.x);
sel.ey = sel.by = Y2ROW(e->xbutton.y);
sel.ex = sel.bx = x2col(e->xbutton.x);
sel.ey = sel.by = y2row(e->xbutton.y);
}
}