aboutsummaryrefslogtreecommitdiff
path: root/Command/VCycle.hs
blob: 20fc9a22a62fe098431f87924e191f673b935ca7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
{- git-annex command
 -
 - Copyright 2014 Joey Hess <id@joeyh.name>
 -
 - Licensed under the GNU GPL version 3 or higher.
 -}

module Command.VCycle where

import Command
import Annex.View
import Types.View
import Logs.View
import Command.View (checkoutViewBranch)

cmd :: Command
cmd = notBareRepo $ notDirect $
	command "vcycle" SectionMetaData
		"switch view to next layout"
		paramNothing (withParams seek)

seek :: CmdParams -> CommandSeek
seek = withNothing start

start ::CommandStart
start = go =<< currentView
  where
	go Nothing = error "Not in a view."
	go (Just v) = do
		showStart "vcycle" ""
		let v' = v { viewComponents = vcycle [] (viewComponents v) }
		if v == v'
			then do
				showNote "unchanged"
				next $ next $ return True
			else next $ next $ checkoutViewBranch v' narrowView

	vcycle rest (c:cs)
		| viewVisible c = rest ++ cs ++ [c]
		| otherwise = vcycle (c:rest) cs
	vcycle rest c = rest ++ c