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authorrobert <robertrussell.72001@gmail.com>2022-01-08 11:40:34 -0800
committersinanmohd <pcmsinan@gmail.com>2023-01-12 08:21:56 +0530
commit3c4c2cffb32782f9b8df961e68c9cadca378f93a (patch)
tree34b7f22a63e62fef200f07c9409f832bf7d22b98
parent80d75fa9d416030108ef1b4e6cc07e67d555aeb5 (diff)
Fix mousereport
This patch replaces the previous one I sent. The following changes are made in this patch: - Fix tracking of pressed buttons. Previously, pressing two buttons and then releasing one would make st think no buttons are pressed, which in particular broke MODE_MOUSEMOTION. - Always send the lowest-numbered pressed button on motion events; when no button is pressed for a motion event in MODE_MOUSEMANY, then send a release. This matches the behaviour of xterm. (Previously, st sent the most recently pressed button in the motion report.) - Remove UB (?) access to potentially inactive struct member e->xbutton.button of XEvent union. - Fix (unlikely) possibility of overflow for large button numbers. The one discrepancy I found between st and xterm is that xterm sometimes encodes buttons with large numbers (>5) strangely. E.g., xterm reports presses of buttons 8 and 9 as releases, whereas st properly (?) encodes them as presses.
-rw-r--r--x.c86
1 files changed, 51 insertions, 35 deletions
diff --git a/x.c b/x.c
index 23d85b7..9c778e0 100644
--- a/x.c
+++ b/x.c
@@ -271,7 +271,7 @@ static char *opt_line = NULL;
static char *opt_name = NULL;
static char *opt_title = NULL;
-static int oldbutton = 3; /* button event on startup: 3 = release */
+static uint buttons; /* bit field of pressed buttons */
void
clipcopy(const Arg *dummy)
@@ -384,61 +384,68 @@ mousesel(XEvent *e, int done)
void
mousereport(XEvent *e)
{
- int len, x = evcol(e), y = evrow(e),
- button = e->xbutton.button, state = e->xbutton.state;
+ int len, btn, code;
+ int x = evcol(e), y = evrow(e);
+ int state = e->xbutton.state;
char buf[40];
static int ox, oy;
- /* from urxvt */
- if (e->xbutton.type == MotionNotify) {
+ if (e->type == MotionNotify) {
if (x == ox && y == oy)
return;
if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
return;
- /* MOUSE_MOTION: no reporting if no button is pressed */
- if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
+ /* MODE_MOUSEMOTION: no reporting if no button is pressed */
+ if (IS_SET(MODE_MOUSEMOTION) && buttons == 0)
return;
-
- button = oldbutton + 32;
- ox = x;
- oy = y;
+ /* Set btn to lowest-numbered pressed button, or 12 if no
+ * buttons are pressed. */
+ for (btn = 1; btn <= 11 && !(buttons & (1<<(btn-1))); btn++)
+ ;
+ code = 32;
} else {
- if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
- button = 3;
- } else {
- button -= Button1;
- if (button >= 7)
- button += 128 - 7;
- else if (button >= 3)
- button += 64 - 3;
- }
- if (e->xbutton.type == ButtonPress) {
- oldbutton = button;
- ox = x;
- oy = y;
- } else if (e->xbutton.type == ButtonRelease) {
- oldbutton = 3;
+ btn = e->xbutton.button;
+ /* Only buttons 1 through 11 can be encoded */
+ if (btn < 1 || btn > 11)
+ return;
+ if (e->type == ButtonRelease) {
/* MODE_MOUSEX10: no button release reporting */
if (IS_SET(MODE_MOUSEX10))
return;
- if (button == 64 || button == 65)
+ /* Don't send release events for the scroll wheel */
+ if (btn == 4 || btn == 5)
return;
}
+ code = 0;
}
+ ox = x;
+ oy = y;
+
+ /* Encode btn into code. If no button is pressed for a motion event in
+ * MODE_MOUSEMANY, then encode it as a release. */
+ if ((!IS_SET(MODE_MOUSESGR) && e->type == ButtonRelease) || btn == 12)
+ code += 3;
+ else if (btn >= 8)
+ code += 128 + btn - 8;
+ else if (btn >= 4)
+ code += 64 + btn - 4;
+ else
+ code += btn - 1;
+
if (!IS_SET(MODE_MOUSEX10)) {
- button += ((state & ShiftMask ) ? 4 : 0)
- + ((state & Mod4Mask ) ? 8 : 0)
- + ((state & ControlMask) ? 16 : 0);
+ code += ((state & ShiftMask ) ? 4 : 0)
+ + ((state & Mod4Mask ) ? 8 : 0)
+ + ((state & ControlMask) ? 16 : 0);
}
if (IS_SET(MODE_MOUSESGR)) {
len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
- button, x+1, y+1,
- e->xbutton.type == ButtonRelease ? 'm' : 'M');
+ code, x+1, y+1,
+ e->type == ButtonRelease ? 'm' : 'M');
} else if (x < 223 && y < 223) {
len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
- 32+button, 32+x+1, 32+y+1);
+ 32+code, 32+x+1, 32+y+1);
} else {
return;
}
@@ -481,9 +488,13 @@ mouseaction(XEvent *e, uint release)
void
bpress(XEvent *e)
{
+ int btn = e->xbutton.button;
struct timespec now;
int snap;
+ if (1 <= btn && btn <= 11)
+ buttons |= 1 << (btn-1);
+
if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
mousereport(e);
return;
@@ -492,7 +503,7 @@ bpress(XEvent *e)
if (mouseaction(e, 0))
return;
- if (e->xbutton.button == Button1) {
+ if (btn == Button1) {
/*
* If the user clicks below predefined timeouts specific
* snapping behaviour is exposed.
@@ -706,6 +717,11 @@ xsetsel(char *str)
void
brelease(XEvent *e)
{
+ int btn = e->xbutton.button;
+
+ if (1 <= btn && btn <= 11)
+ buttons &= ~(1 << (btn-1));
+
if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
mousereport(e);
return;
@@ -713,7 +729,7 @@ brelease(XEvent *e)
if (mouseaction(e, 1))
return;
- if (e->xbutton.button == Button1)
+ if (btn == Button1)
mousesel(e, 1);
}