mirror of
https://github.com/pestctrl/emacs-config.git
synced 2026-02-16 16:24:18 +00:00
220 lines
8.1 KiB
Org Mode
220 lines
8.1 KiB
Org Mode
* Changing the transparency of specific windows
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#+begin_src emacs-lisp
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;; Stack Trace
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;; - https://www.google.com/search?client=firefox-b-1-d&q=change+window+transparency+compton
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;; - https://github.com/chjj/compton/issues/219
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;; - _NET_WM_WINDOW_OPACITY
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;; - https://github.com/i3/i3/issues/2840
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;; - Failure
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;; - https://www.google.com/search?client=firefox-b-1-d&ei=Qn4OXarOFNG4tQX1yKrwAg&q=dynamically+set+window+transparency+compton&oq=dynamically+set+window+transparency+compton&gs_l=psy-ab.3...1302.1926..2080...0.0..0.121.655.6j1......0....1..gws-wiz.......0i71j33i22i29i30j35i304i39j33i160.w6gx35dRUJc
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;; - https://www.reddit.com/r/unixporn/comments/3osw03/toggling_transparency_on_windows_in_compton_and/
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;; - https://github.com/freedesktop/transset
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;; - XChangeProperty
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;; - https://gitlab.peach-bun.com/pinion/SFML/commit/135c1716e877464db720265f37316cbb54ef13f2?expanded=1&view=parallel
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;; - xcb_change_property
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;; - https://www.x.org/releases/current/doc/man/man3/xcb_change_property.3.xhtml
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;; Also found this: https://xcb.freedesktop.org/XmlXcb/
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;; C-h f xcb change property
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;; Found xcb:ChangeProperty
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;; Let the hacking begin
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;; Found xcb:ewmh:-atoms
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;; added opacity to list
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;; called init function xcb:ewmh:init
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;; found opacity is cardinal atom through xprop
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;; example c call: https://github.com/ehntoo/unagi/blob/master/plugins/opacity.c#L71
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;; True example: https://github.com/polybar/polybar/blob/ca4426a9620f4db05a0117282fbed3a32a14ec92/src/x11/ewmh.cpp#L168
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;; reading from transset
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;; So in C with Xlib, NWWO (my new abbreviation) is essentially an unsigned int.
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;; max value is completely opaque, min is the opposite.
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;; However, it's converted to a char array when passed to xlib xchangeproperty
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;; xcb_change_property(conn->connection, XCB_PROP_MODE_REPLACE, win, _NET_WM_WINDOW_OPACITY, XCB_ATOM_CARDINAL, 32, 1, &values);
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(require 'dash)
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(require 'hydra)
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(defconst my/unsigned-int-max 4294967295)
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(defun my/int-to-char-array (int)
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(cl-labels ((thunk (int depth)
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(if (= depth 4)
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nil
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(cons (% int 256)
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(thunk (/ int 256)
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(1+ depth))))))
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(thunk int 0)))
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(defun my/char-array-to-int (arr)
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(let ((iter (1- (length arr)))
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(sum 0))
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(while (>= iter 0)
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(setf sum (+ (* 256 sum) (aref arr iter)))
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(decf iter))
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sum))
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(defun my/map-to-unsigned-int (percent)
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(round (* my/unsigned-int-max percent)))
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(defun my/map-to-percent (val)
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(/ val (float my/unsigned-int-max)))
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(defun my/set-transparency (window-id value)
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"`value` should be an float between 0 and and 1,"
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(->> value
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(my/map-to-unsigned-int)
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(my/int-to-char-array)
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(make-instance xcb:ChangeProperty
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:mode xcb:PropMode:Replace :window window-id
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:property xcb:Atom:_NET_WM_WINDOW_OPACITY :type xcb:Atom:CARDINAL
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:format 32 :data-len 1 :data)
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(xcb:+request exwm--connection))
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(xcb:flush exwm--connection))
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(defun my/get-transparency (window-id)
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(let ((reply (->> window-id
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(make-instance xcb:GetProperty :delete 0
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:property xcb:Atom:_NET_WM_WINDOW_OPACITY :type xcb:Atom:CARDINAL
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:long-offset 0 :long-length 1
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:window)
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(xcb:+request-unchecked+reply exwm--connection))))
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(let ((char-arr (slot-value reply 'value)))
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(if (zerop (length char-arr))
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1.0
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(-> char-arr
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(my/char-array-to-int)
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(my/map-to-percent))))))
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(defun my/increase-window-transparency ()
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(interactive)
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(when-let (id (exwm--buffer->id (current-buffer)))
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(let* ((curr-trans (my/get-transparency id))
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(new-trans (+ curr-trans 0.1)))
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(my/set-transparency
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id (if (< 1 new-trans) 1 new-trans)))))
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(defun my/decrease-window-transparency ()
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(interactive)
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(when-let (id (exwm--buffer->id (current-buffer)))
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(let* ((curr-trans (my/get-transparency id))
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(new-trans (- curr-trans 0.1)))
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(my/set-transparency
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id (if (< new-trans 0) 0 new-trans)))))
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(defun my/reset-window-transparency ()
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(interactive)
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(when-let (id (exwm--buffer->id (current-buffer)))
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(my/set-transparency id 1.0)))
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(defhydra window-transparency-hydra (*window-map* "t")
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"Manage window splits"
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("j" my/decrease-window-transparency)
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("k" my/increase-window-transparency)
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("r" my/reset-window-transparency)
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("q" nil))
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(eval-and-compile
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(defconst xcb:ewmh:-atoms
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'( ;; Root Window Properties (and Related Messages)
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_NET_SUPPORTED
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_NET_CLIENT_LIST
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_NET_CLIENT_LIST_STACKING
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_NET_NUMBER_OF_DESKTOPS
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_NET_DESKTOP_GEOMETRY
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_NET_DESKTOP_VIEWPORT
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_NET_CURRENT_DESKTOP
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_NET_DESKTOP_NAMES
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_NET_ACTIVE_WINDOW
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_NET_WORKAREA
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_NET_SUPPORTING_WM_CHECK
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_NET_VIRTUAL_ROOTS
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_NET_DESKTOP_LAYOUT
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_NET_SHOWING_DESKTOP
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;; Other Root Window Messages
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_NET_CLOSE_WINDOW
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_NET_MOVERESIZE_WINDOW
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_NET_WM_MOVERESIZE
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_NET_RESTACK_WINDOW
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_NET_REQUEST_FRAME_EXTENTS
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;; Application Window Properties
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_NET_WM_NAME
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_NET_WM_VISIBLE_NAME
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_NET_WM_ICON_NAME
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_NET_WM_VISIBLE_ICON_NAME
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_NET_WM_DESKTOP
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_NET_WM_WINDOW_TYPE
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_NET_WM_STATE
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_NET_WM_ALLOWED_ACTIONS
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_NET_WM_STRUT
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_NET_WM_STRUT_PARTIAL
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_NET_WM_ICON_GEOMETRY
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_NET_WM_ICON
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_NET_WM_PID
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_NET_WM_HANDLED_ICONS
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_NET_WM_USER_TIME
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_NET_WM_USER_TIME_WINDOW
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_NET_FRAME_EXTENTS
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_NET_WM_OPAQUE_REGION
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_NET_WM_BYPASS_COMPOSITOR
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;; Window Manager Protocols
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_NET_WM_PING
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_NET_WM_SYNC_REQUEST
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_NET_WM_SYNC_REQUEST_COUNTER
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_NET_WM_FULLSCREEN_MONITORS
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;; Other Properties
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_NET_WM_FULL_PLACEMENT
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_NET_WM_CM_S0 ;_NET_WM_CM_Sn (n = 1, 2, ...) are left out here.
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;; _NET_WM_WINDOW_TYPE hint
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_NET_WM_WINDOW_TYPE_DESKTOP
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_NET_WM_WINDOW_TYPE_DOCK
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_NET_WM_WINDOW_TYPE_TOOLBAR
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_NET_WM_WINDOW_TYPE_MENU
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_NET_WM_WINDOW_TYPE_UTILITY
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_NET_WM_WINDOW_TYPE_SPLASH
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_NET_WM_WINDOW_TYPE_DIALOG
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_NET_WM_WINDOW_TYPE_DROPDOWN_MENU
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_NET_WM_WINDOW_TYPE_POPUP_MENU
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_NET_WM_WINDOW_TYPE_TOOLTIP
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_NET_WM_WINDOW_TYPE_NOTIFICATION
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_NET_WM_WINDOW_TYPE_COMBO
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_NET_WM_WINDOW_TYPE_DND
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_NET_WM_WINDOW_TYPE_NORMAL
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;; _NET_WM_STATE hint
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_NET_WM_STATE_MODAL
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_NET_WM_STATE_STICKY
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_NET_WM_STATE_MAXIMIZED_VERT
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_NET_WM_STATE_MAXIMIZED_HORZ
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_NET_WM_STATE_SHADED
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_NET_WM_STATE_SKIP_TASKBAR
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_NET_WM_STATE_SKIP_PAGER
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_NET_WM_STATE_HIDDEN
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_NET_WM_STATE_FULLSCREEN
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_NET_WM_STATE_ABOVE
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_NET_WM_STATE_BELOW
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_NET_WM_STATE_DEMANDS_ATTENTION
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_NET_WM_STATE_FOCUSED
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;; _NET_WM_ACTION hint
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_NET_WM_ACTION_MOVE
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_NET_WM_ACTION_RESIZE
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_NET_WM_ACTION_MINIMIZE
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_NET_WM_ACTION_SHADE
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_NET_WM_ACTION_STICK
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_NET_WM_ACTION_MAXIMIZE_HORZ
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_NET_WM_ACTION_MAXIMIZE_VERT
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_NET_WM_ACTION_FULLSCREEN
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_NET_WM_ACTION_CHANGE_DESKTOP
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_NET_WM_ACTION_CLOSE
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_NET_WM_ACTION_ABOVE
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_NET_WM_ACTION_BELOW
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_NET_WM_WINDOW_OPACITY)
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"EWMH atoms.")
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(dolist (atom xcb:ewmh:-atoms)
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(eval `(defvar ,(intern (concat "xcb:Atom:" (symbol-name atom))) nil))))
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(xcb:ewmh:init exwm--connection t)
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#+end_src
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