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tui/input.c: add support for mouse release events in urxvt (#8309) 

Some terminals don't report which buttons are involved in some mouse
events. For example, the urxvt protocol
(http://www.huge-man-linux.net/man7/urxvt.html section "Mouse
reporting") does not report which button has been released.
In this case libtermkey reports button 0
(http://www.leonerd.org.uk/code/libtermkey/doc/termkey_interpret_mouse.3.html)

Up to now, forward_mouse_event did not handle button==0.
On press events there is not much we can do, and we keep the
current behavior which is dropping the event. But on drag-and-release
events we can compensate by remembering the last button pressed.

fixes #3182 for urxvt
fixes #5400
This commit is contained in:
symphorien 2018-04-22 17:26:04 +00:00 committed by Justin M. Keyes
parent d05712fbe7
commit ffb8904913
1 changed files with 13 additions and 2 deletions
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15
src/nvim/tui/input.c
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@ -170,11 +170,21 @@ static void forward_mouse_event(TermInput *input, TermKeyKey *key)
char buf[64];
size_t len = 0;
int button, row, col;
static int last_pressed_button = 0;
TermKeyMouseEvent ev;
termkey_interpret_mouse(input->tk, key, &ev, &button, &row, &col);
if (ev != TERMKEY_MOUSE_PRESS && ev != TERMKEY_MOUSE_DRAG
&& ev != TERMKEY_MOUSE_RELEASE) {
if ((ev == TERMKEY_MOUSE_RELEASE || ev == TERMKEY_MOUSE_DRAG)
&& button == 0) {
// Some terminals (like urxvt) don't report which button was released.
// libtermkey reports button 0 in this case.
// For drag and release, we can reasonably infer the button to be the last
// pressed one.
button = last_pressed_button;
}
if (button == 0 || (ev != TERMKEY_MOUSE_PRESS && ev != TERMKEY_MOUSE_DRAG
&& ev != TERMKEY_MOUSE_RELEASE)) {
return;
}
@ -210,6 +220,7 @@ static void forward_mouse_event(TermInput *input, TermKeyKey *key)
"ScrollWheelDown");
} else {
len += (size_t)snprintf(buf + len, sizeof(buf) - len, "Mouse");
last_pressed_button = button;
}
break;
case TERMKEY_MOUSE_DRAG: