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Only call exwm-randr-screen-change-hook on new event sequence number

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Multiple event callbacks are triggered per physical monitor plug event.
This de-duplicates the events triggering the running of the hook.
This commit is contained in:
James Ferguson 2018-12-03 11:25:11 -05:00
parent 58f7916619
commit e6892216a6
1 changed files with 9 additions and 2 deletions
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11
exwm-randr.el
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@ -95,6 +95,8 @@ corresponding monitors whenever the monitors are active.
(defvar exwm-workspace--fullscreen-frame-count)
(defvar exwm-workspace--list)
(defvar exwm-randr--prev-screen-change-seqnum nil
"The most recent ScreenChangeNotify sequence number.")
(declare-function exwm-workspace--count "exwm-workspace.el")
(declare-function exwm-workspace--set-active "exwm-workspace.el"
(frame active))
@ -193,12 +195,17 @@ corresponding monitors whenever the monitors are active.
(define-obsolete-function-alias 'exwm-randr--refresh #'exwm-randr-refresh
"27.1")
(defun exwm-randr--on-ScreenChangeNotify (_data _synthetic)
(defun exwm-randr--on-ScreenChangeNotify (data _synthetic)
"Handle `ScreenChangeNotify' event.
Run `exwm-randr-screen-change-hook' (usually user scripts to configure RandR)."
(exwm--log)
(run-hooks 'exwm-randr-screen-change-hook))
(let ((evt (make-instance 'xcb:randr:ScreenChangeNotify)))
(xcb:unmarshal evt data)
(let ((seqnum (slot-value evt '~sequence)))
(unless (equal seqnum exwm-randr--prev-screen-change-seqnum)
(setq exwm-randr--prev-screen-change-seqnum seqnum)
(run-hooks 'exwm-randr-screen-change-hook)))))
(defun exwm-randr--on-Notify (data _synthetic)
"Handle `CrtcChangeNotify' and `OutputChangeNotify' events.