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placement: Add a callback to detach the placement function

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This commit is contained in:
Emmanuel Lepage Vallee 2016-05-07 01:45:50 -04:00
parent b4f08eb7b6
commit 50c97ed167
1 changed files with 42 additions and 0 deletions
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42
lib/awful/placement.lua
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@ -51,6 +51,11 @@
--
-- **attach** (*boolean*):
--
-- When the parent geometry (like the screen) changes, re-apply the placement
-- function. This will add a `detach_callback` function to the drawable. Call
-- this to detach the function. This will be called automatically when a new
-- attached function is set.
--
-- **offset** (*table or number*):
--
-- The offset(s) to apply to the new geometry.
@ -505,6 +510,16 @@ attach = function(d, position_f, args)
if not position_f then return end
-- If there is multiple attached function, there is an high risk of infinite
-- loop. While some combinaisons are harmless, other are very hard to debug.
--
-- Use the placement composition to build explicit multi step attached
-- placement functions.
if d.detach_callback then
d.detach_callback()
d.detach_callback = nil
end
local function tracker()
position_f(d, args)
end
@ -540,6 +555,33 @@ attach = function(d, position_f, args)
if parent then
parent:connect_signal("property::geometry" , tracker)
end
-- Create a way to detach a placement function
d:add_signal("property::detach_callback")
function d.detach_callback()
d:disconnect_signal("property::width" , tracker)
d:disconnect_signal("property::height" , tracker)
d:disconnect_signal("property::border_width", tracker)
if parent then
parent:disconnect_signal("property::geometry" , tracker)
if parent == d.screen then
if args.honor_workarea then
parent:disconnect_signal("property::workarea", tracker)
end
if args.honor_padding then
parent:disconnect_signal("property::padding", tracker)
end
end
end
if args.update_workarea then
d:disconnect_signal("property::geometry" , tracker_struts)
d:disconnect_signal("property::visible" , tracker_struts)
capi.client.disconnect_signal("property::struts", tracker_struts)
end
end
end
--- Check if an area intersect another area.