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.master
robert
Hiltjo Posthuma
parent
7fb0c0cc68
commit
ea7cd7b62f
86
x.c
86
x.c
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@ -252,7 +252,7 @@ static char *opt_line = NULL;
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static char *opt_name = NULL;
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static char *opt_title = NULL;
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static int oldbutton = 3; /* button event on startup: 3 = release */
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static uint buttons; /* bit field of pressed buttons */
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void
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clipcopy(const Arg *dummy)
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@ -364,61 +364,68 @@ mousesel(XEvent *e, int done)
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void
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mousereport(XEvent *e)
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{
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int len, x = evcol(e), y = evrow(e),
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button = e->xbutton.button, state = e->xbutton.state;
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int len, btn, code;
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int x = evcol(e), y = evrow(e);
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int state = e->xbutton.state;
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char buf[40];
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static int ox, oy;
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/* from urxvt */
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if (e->xbutton.type == MotionNotify) {
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if (e->type == MotionNotify) {
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if (x == ox && y == oy)
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return;
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if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
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return;
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/* MOUSE_MOTION: no reporting if no button is pressed */
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if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
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/* MODE_MOUSEMOTION: no reporting if no button is pressed */
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if (IS_SET(MODE_MOUSEMOTION) && buttons == 0)
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return;
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button = oldbutton + 32;
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ox = x;
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oy = y;
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/* Set btn to lowest-numbered pressed button, or 12 if no
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* buttons are pressed. */
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for (btn = 1; btn <= 11 && !(buttons & (1<<(btn-1))); btn++)
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;
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code = 32;
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} else {
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if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
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button = 3;
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} else {
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button -= Button1;
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if (button >= 7)
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button += 128 - 7;
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else if (button >= 3)
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button += 64 - 3;
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}
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if (e->xbutton.type == ButtonPress) {
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oldbutton = button;
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ox = x;
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oy = y;
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} else if (e->xbutton.type == ButtonRelease) {
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oldbutton = 3;
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btn = e->xbutton.button;
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/* Only buttons 1 through 11 can be encoded */
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if (btn < 1 || btn > 11)
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return;
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if (e->type == ButtonRelease) {
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/* MODE_MOUSEX10: no button release reporting */
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if (IS_SET(MODE_MOUSEX10))
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return;
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if (button == 64 || button == 65)
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/* Don't send release events for the scroll wheel */
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if (btn == 4 || btn == 5)
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return;
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}
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code = 0;
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}
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ox = x;
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oy = y;
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/* Encode btn into code. If no button is pressed for a motion event in
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* MODE_MOUSEMANY, then encode it as a release. */
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if ((!IS_SET(MODE_MOUSESGR) && e->type == ButtonRelease) || btn == 12)
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code += 3;
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else if (btn >= 8)
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code += 128 + btn - 8;
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else if (btn >= 4)
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code += 64 + btn - 4;
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else
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code += btn - 1;
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if (!IS_SET(MODE_MOUSEX10)) {
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button += ((state & ShiftMask ) ? 4 : 0)
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+ ((state & Mod4Mask ) ? 8 : 0)
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+ ((state & ControlMask) ? 16 : 0);
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code += ((state & ShiftMask ) ? 4 : 0)
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+ ((state & Mod4Mask ) ? 8 : 0)
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+ ((state & ControlMask) ? 16 : 0);
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}
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if (IS_SET(MODE_MOUSESGR)) {
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len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
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button, x+1, y+1,
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e->xbutton.type == ButtonRelease ? 'm' : 'M');
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code, x+1, y+1,
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e->type == ButtonRelease ? 'm' : 'M');
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} else if (x < 223 && y < 223) {
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len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
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32+button, 32+x+1, 32+y+1);
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32+code, 32+x+1, 32+y+1);
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} else {
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return;
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}
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@ -461,9 +468,13 @@ mouseaction(XEvent *e, uint release)
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void
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bpress(XEvent *e)
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{
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int btn = e->xbutton.button;
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struct timespec now;
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int snap;
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if (1 <= btn && btn <= 11)
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buttons |= 1 << (btn-1);
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if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
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mousereport(e);
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return;
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@ -472,7 +483,7 @@ bpress(XEvent *e)
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if (mouseaction(e, 0))
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return;
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if (e->xbutton.button == Button1) {
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if (btn == Button1) {
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/*
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* If the user clicks below predefined timeouts specific
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* snapping behaviour is exposed.
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@ -686,6 +697,11 @@ xsetsel(char *str)
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void
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brelease(XEvent *e)
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{
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int btn = e->xbutton.button;
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if (1 <= btn && btn <= 11)
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buttons &= ~(1 << (btn-1));
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if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
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mousereport(e);
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return;
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@ -693,7 +709,7 @@ brelease(XEvent *e)
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if (mouseaction(e, 1))
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return;
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if (e->xbutton.button == Button1)
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if (btn == Button1)
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mousesel(e, 1);
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}
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