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ui.tools.listener.history: only add a history entry if it does not match the most recent entry.

db4
John Benediktsson 2011-09-15 07:57:51 -07:00
parent 7507196a98
commit 27e0071105
2 changed files with 20 additions and 3 deletions
basis/ui/tools/listener/history

12
basis/ui/tools/listener/history/history-tests.factor
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@ -1,7 +1,9 @@
! Copyright (C) 2009 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
USING: documents namespaces tools.test io.styles
ui.tools.listener.history kernel ;
USING: accessors documents io.styles kernel namespaces
sequences tools.test ui.tools.listener.history ;
IN: ui.tools.listener.history.tests
[ ] [ <document> "d" set ] unit-test
@ -65,3 +67,9 @@ IN: ui.tools.listener.history.tests
[ ] [ " " "d" get set-doc-string ] unit-test
[ ] [ "h" get history-recall-previous ] unit-test
[ 1 ] [
"abc" <document> [ set-doc-string ] [ <history> ] bi
[ history-add drop ]
[ history-add drop ]
[ elements>> length ] tri
] unit-test

11
basis/ui/tools/listener/history/history.factor
View File

@ -9,10 +9,19 @@ TUPLE: history document elements index ;
: <history> ( document -- history )
V{ } clone 0 history boa ;
<PRIVATE
: push-if-not-last ( elt seq -- )
dup empty? [ push ] [
dup last pick = [ 2drop ] [ push ] if
] if ;
PRIVATE>
: history-add ( history -- input )
dup elements>> length 1 + >>index
[ document>> doc-string [ <input> ] [ empty? ] bi ] keep
'[ [ _ elements>> push ] keep ] unless ;
'[ [ _ elements>> push-if-not-last ] keep ] unless ;
<PRIVATE