From 0a9dc8209408bc558e1708213ab3ca99e25b2e08 Mon Sep 17 00:00:00 2001 From: Stefan Monnier Date: Fri, 25 May 2007 15:00:41 +0000 Subject: [PATCH] (xterm-mouse-truncate-wrap): New function. (xterm-mouse-event): Use it. --- lisp/xt-mouse.el | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/lisp/xt-mouse.el b/lisp/xt-mouse.el index 8ae79903d51..a4779053937 100644 --- a/lisp/xt-mouse.el +++ b/lisp/xt-mouse.el @@ -122,6 +122,22 @@ (+ c #x8000000 128) c))) +(defun xterm-mouse-truncate-wrap (f) + "Truncate with wrap-around." + (condition-case nil + ;; First try the built-in truncate, in case there's no overflow. + (truncate f) + ;; In case of overflow, do wraparound by hand. + (range-error + ;; In our case, we wrap around every 3 days or so, so if we assume + ;; a maximum of 65536 wraparounds, we're safe for a couple years. + ;; Using a power of 2 makes rounding errors less likely. + (let* ((maxwrap (* 65536 2048)) + (dbig (truncate (/ f maxwrap))) + (fdiff (- f (* 1.0 maxwrap dbig)))) + (+ (truncate fdiff) (* maxwrap dbig)))))) + + (defun xterm-mouse-event () "Convert XTerm mouse event to Emacs mouse event." (let* ((type (- (xterm-mouse-event-read) #o40)) @@ -129,7 +145,7 @@ (y (- (xterm-mouse-event-read) #o40 1)) ;; Emulate timestamp information. This is accurate enough ;; for default value of mouse-1-click-follows-link (450msec). - (timestamp (truncate + (timestamp (xterm-mouse-truncate-wrap (* 1000 (- (float-time) (or xt-mouse-epoch @@ -206,5 +222,5 @@ down the SHIFT key while pressing the mouse button." (provide 'xt-mouse) -;;; arch-tag: 84962d4e-fae9-4c13-a9d7-ef4925a4ac03 +;; arch-tag: 84962d4e-fae9-4c13-a9d7-ef4925a4ac03 ;;; xt-mouse.el ends here -- 2.30.2