master b3ceeb3f2a: Generate TOUCH_END_EVENTs on NS when mwheel momentum is disabled

[Po Lu]

branch: master
commit b3ceeb3f2a4240736840422c272204030d113083
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Generate TOUCH_END_EVENTs on NS when mwheel momentum is disabled
    
    * src/nsterm.m ([EmacsView mouseDown:]): Generate
    TOUCH_END_EVENTs on the first event whose momentum phase is not
    NSEventPhaseNone.
---
 src/nsterm.m | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/nsterm.m b/src/nsterm.m
index 428d1a2fe2..a15dc47a22 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -6519,6 +6519,22 @@ not_in_argv (NSString *arg)
           int x = 0, y = 0;
           int scrollUp = NO;
 
+         static bool end_flag = false;
+
+         if (!ns_use_mwheel_momentum && !end_flag
+             && [theEvent momentumPhase] != NSEventPhaseNone)
+           {
+             emacs_event->kind = TOUCH_END_EVENT;
+             emacs_event->arg = Qnil;
+             end_flag = [theEvent momentumPhase] != NSEventPhaseNone;
+             XSETINT (emacs_event->x, lrint (p.x));
+             XSETINT (emacs_event->y, lrint (p.y));
+             EV_TRAILER (theEvent);
+             return;
+           }
+
+         end_flag = [theEvent momentumPhase] != NSEventPhaseNone;
+
           /* FIXME: At the top or bottom of the buffer we should
            * ignore momentum-phase events.  */
           if (! ns_use_mwheel_momentum