Partial fix for "null" `HGChangeset`
"null" changeset is currently kept as a singleton instance, i.e.,
`HGChangeset null` always return the same object. However, some
queries (such as `#isObsolete` or `#successors`) require repository
to be set - obviously, for "null" changeset there's no repository.
Therefore these queries resulted into DNU.
To paetially fix this, short-circuit these query methods to answer
trasonable values for "null" changeset. Better solution would be to
make "null" changeset a normal changeset within a repository.
"
stx:libscm - a new source code management library for Smalltalk/X
Copyright (C) 2012-2015 Jan Vrany
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"
"{ Package: 'stx:libscm/mercurial' }"
"{ NameSpace: Smalltalk }"
HGRepositoryObject subclass:#HGChangesetLabel
instanceVariableNames:'name color'
classVariableNames:''
poolDictionaries:''
category:'SCM-Mercurial-Internal'
!
!HGChangesetLabel class methodsFor:'documentation'!
copyright
"
stx:libscm - a new source code management library for Smalltalk/X
Copyright (C) 2012-2015 Jan Vrany
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"
!
documentation
"
documentation to be added.
[author:]
Jan Vrany <jan.vrany@fit.cvut.cz>
[instance variables:]
[class variables:]
[see also:]
"
! !
!HGChangesetLabel class methodsFor:'testing'!
isAbstract
^ self == HGChangesetLabel
! !
!HGChangesetLabel methodsFor:'accessing'!
name
"Returns a branche's name"
^ name
"Modified (comment): / 22-10-2012 / 19:59:44 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!HGChangesetLabel methodsFor:'accessing-presentation'!
color
"Return a color that should be maybe when displaying branch
visual guide."
^ self subclassResponsibility
"Modified (comment): / 20-03-2014 / 01:43:03 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!HGChangesetLabel methodsFor:'displaying'!
displayOn: aGC x: x y: y
| savedFG savedBG w h a |
savedFG := aGC paint.
savedBG := aGC background.
w := aGC widthOfString: self name.
h := aGC font height.
a := aGC font ascent.
aGC fillRectangleX: x y: y width: w + 3 + 3 height: h + 2 + 2 color: self color.
aGC paint: (self color contrastingBlackOrWhite).
aGC displayString: self name x: x + 3 y: y + a + 2.
aGC paint: savedFG.
aGC background: savedBG
"Created: / 16-03-2014 / 23:20:53 / Jan Vrany <jan.vrany@fit.cvut.cz>"
"Modified: / 17-03-2014 / 23:33:50 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
heightOn: aGC
| h |
h := aGC font height.
^ h + 2 + 2.
"Created: / 17-03-2014 / 09:05:12 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
widthOn: aGC
| w |
w := aGC widthOfString: self name.
^ w + 3 + 3
"Created: / 17-03-2014 / 09:05:38 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!HGChangesetLabel methodsFor:'initialization'!
setName: aString
name := aString
"Created: / 22-10-2012 / 20:00:38 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!HGChangesetLabel methodsFor:'printing & storing'!
printOn:aStream
"append a printed representation if the receiver to the argument, aStream"
super printOn:aStream.
aStream nextPutAll:'('.
name printOn:aStream.
aStream nextPutAll:')'.
"Modified: / 10-12-2012 / 03:17:30 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!HGChangesetLabel methodsFor:'testing'!
isBookmark
^ false
!
isBranch
^ false
!
isTag
^ false
! !
!HGChangesetLabel class methodsFor:'documentation'!
version_HG
^ '$Changeset: <not expanded> $'
! !