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Added support for double/triple click+dragging.

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Now double-click+dragging automatically snaps both ends to word boundaries
(unless on series of spaces), and triple-click selects whole lines.
As a side effect, snapping now occurs on button press, not button release
like it previously was, but I hope that won't be inconvenient for anyone.

Signed-off-by: Christoph Lohmann <20h@r-36.net>
This commit is contained in:
Alexander Sedov 2013-04-15 10:28:31 +04:00 committed by Christoph Lohmann
parent 3c546ae739
commit 872a7f18ea
1 changed files with 63 additions and 27 deletions
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90
st.c
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@ -135,6 +135,11 @@ enum selection_type {
SEL_RECTANGULAR = 2
};
enum selection_snap {
SNAP_WORD = 1,
SNAP_LINE = 2
};
/* bit macro */
#undef B0
enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
@ -232,6 +237,7 @@ typedef struct {
typedef struct {
int mode;
int type;
int snap;
int bx, by;
int ex, ey;
struct {
@ -372,6 +378,7 @@ static void selinit(void);
static inline bool selected(int, int);
static void selcopy(void);
static void selscroll(int, int);
static void selsnap(int, int *, int *, int);
static int utf8decode(char *, long *);
static int utf8encode(long *, char *);
@ -657,6 +664,25 @@ selected(int x, int y) {
&& (x <= sel.e.x || sel.b.y != sel.e.y));
}
void
selsnap(int mode, int *x, int *y, int direction) {
switch(mode) {
case SNAP_WORD:
while(*x > 0 && *x < term.col-1 && term.line[*y][*x + direction].c[0] != ' ') {
*x += direction;
}
break;
case SNAP_LINE:
*x = (direction < 0) ? 0 : term.col - 1;
break;
default:
/* do nothing */
break;
}
}
void
getbuttoninfo(XEvent *e) {
int type;
@ -667,6 +693,15 @@ getbuttoninfo(XEvent *e) {
sel.ex = x2col(e->xbutton.x);
sel.ey = y2row(e->xbutton.y);
if (sel.by < sel.ey
|| (sel.by == sel.ey && sel.bx < sel.ex)) {
selsnap(sel.snap, &sel.bx, &sel.by, -1);
selsnap(sel.snap, &sel.ex, &sel.ey, +1);
} else {
selsnap(sel.snap, &sel.ex, &sel.ey, -1);
selsnap(sel.snap, &sel.bx, &sel.by, +1);
}
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;
@ -730,9 +765,13 @@ mousereport(XEvent *e) {
void
bpress(XEvent *e) {
struct timeval now;
if(IS_SET(MODE_MOUSE)) {
mousereport(e);
} else if(e->xbutton.button == Button1) {
gettimeofday(&now, NULL);
/* Clear previous selection, logically and visually. */
if(sel.bx != -1) {
sel.bx = -1;
tsetdirt(sel.b.y, sel.e.y);
@ -742,6 +781,30 @@ bpress(XEvent *e) {
sel.type = SEL_REGULAR;
sel.ex = sel.bx = x2col(e->xbutton.x);
sel.ey = sel.by = y2row(e->xbutton.y);
/*
* Snap handling.
* If user clicks are fasst enough (e.g. below timeouts),
* we ignore if his hand slipped left or down and accidentally selected more;
* we are just snapping to whatever we're snapping.
*/
if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
/* Snap to line */
sel.snap = SNAP_LINE;
} else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
sel.snap = SNAP_WORD;
} else {
sel.snap = 0;
}
selsnap(sel.snap, &sel.bx, &sel.by, -1);
selsnap(sel.snap, &sel.ex, &sel.ey, 1);
sel.b.x = sel.bx, sel.b.y = sel.by, sel.e.x = sel.ex, sel.e.y = sel.ey;
/* Draw selection, unless it's regular and we don't want to make clicks visible */
if (sel.snap != 0) {
tsetdirt(sel.b.y, sel.e.y);
draw();
}
sel.tclick2 = sel.tclick1;
sel.tclick1 = now;
} else if(e->xbutton.button == Button4) {
ttywrite("\031", 1);
} else if(e->xbutton.button == Button5) {
@ -907,8 +970,6 @@ xsetsel(char *str) {
void
brelease(XEvent *e) {
struct timeval now;
if(IS_SET(MODE_MOUSE)) {
mousereport(e);
return;
@ -922,35 +983,10 @@ brelease(XEvent *e) {
term.dirty[sel.ey] = 1;
if(sel.bx == sel.ex && sel.by == sel.ey) {
sel.bx = -1;
gettimeofday(&now, NULL);
if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
/* triple click on the line */
sel.b.x = sel.bx = 0;
sel.e.x = sel.ex = term.col;
sel.b.y = sel.e.y = sel.ey;
selcopy();
} else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
/* double click to select word */
sel.bx = sel.ex;
while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].c[0] != ' ') {
sel.bx--;
}
sel.b.x = sel.bx;
while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].c[0] != ' ') {
sel.ex++;
}
sel.e.x = sel.ex;
sel.b.y = sel.e.y = sel.ey;
selcopy();
}
} else {
selcopy();
}
}
memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
gettimeofday(&sel.tclick1, NULL);
}
void