"
 COPYRIGHT (c) 2006 by eXept Software AG
	      All Rights Reserved

 This software is furnished under a license and may be used
 only in accordance with the terms of that license and with the
 inclusion of the above copyright notice.   This software may not
 be provided or otherwise made available to, or used by, any
 other person.  No title to or ownership of the software is
 hereby transferred.
"
"{ Package: 'stx:libtool' }"

"{ NameSpace: Tools }"

TwoColumnTextView subclass:#DiffCodeView2
	instanceVariableNames:''
	classVariableNames:''
	poolDictionaries:''
	category:'Interface-CodeView'
!

Object subclass:#DiffData
	instanceVariableNames:'text1 text2 inserted deleted changed'
	classVariableNames:''
	poolDictionaries:''
	privateIn:DiffCodeView2
!

!DiffCodeView2 class methodsFor:'documentation'!

copyright
"
 COPYRIGHT (c) 2006 by eXept Software AG
	      All Rights Reserved

 This software is furnished under a license and may be used
 only in accordance with the terms of that license and with the
 inclusion of the above copyright notice.   This software may not
 be provided or otherwise made available to, or used by, any
 other person.  No title to or ownership of the software is
 hereby transferred.
"
! !

!DiffCodeView2 class methodsFor:'defaults'!

textViewClass
    "return the type of the synced subViews.
     Can be redefined in subclasses"

    ^ Tools::CodeView2

    "Created: / 06-03-2010 / 10:40:18 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!DiffCodeView2 methodsFor:'accessing'!

text1:t1 text2:t2 
    |data|

    data := self computeDiffDataForText1:t1 text2:t2.

    (textViews at:1) 
        contents:(data text1);
        deletedLines:(data deleted);
        changedLines:(data changed);
        insertedLines:#();    
        originDiffText:t1;
        emptyLines:(data inserted).

    (textViews at:2) 
        contents:(data text2);
        deletedLines:#();
        changedLines:(data changed);
        insertedLines:(data inserted);
        originDiffText:t2;
        emptyLines:(data deleted).

    "Created: / 06-03-2010 / 10:45:49 / Jan Vrany <jan.vrany@fit.cvut.cz>"
    "Modified: / 22-06-2010 / 21:36:35 / Jakub <zelenja7@fel.cvut.cz>"
    "Modified: / 15-07-2010 / 23:08:39 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!DiffCodeView2 methodsFor:'initialization'!

initialize

    super initialize.
    textViews do:
        [:thisView|
        thisView diffMode: true.
        thisView ~= textViews first ifTrue:
            [thisView showGutterChannel value: false].
        textViews do:
            [:otherView|
            thisView == otherView ifFalse:
                [thisView synchronizeWith: otherView]]].

    "Created: / 06-04-2010 / 14:15:03 / Jakub <zelenja7@fel.cvut.cz>"
    "Modified: / 23-06-2010 / 19:36:38 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!DiffCodeView2 methodsFor:'private'!

computeDiffDataForText1:t1 text2:t2 
    "created diffText object from two string"
    
    |array1 array2 diff change index1 index2 text1 text2 i diffHelper deleted inserted helperText addConstant1 addConstant2 changed helper ins del pom|

    "cerate array from origin text(1 item=1 row)"
    array1 := self createArray:t1.
    array2 := self createArray:t2.
     "inserted,deleted, cahnged lines"
    inserted := OrderedCollection new.
    deleted := OrderedCollection new.
    changed := OrderedCollection new.
     "indicates which row of origin text is added to ne text"
    index1 := 1.
    index2 := 1.
     "indicate how much rows were deleted or inserted "
    addConstant1 := 0.
    addConstant2 := 0.
    text1 := ''.
    text2 := ''.
    diff := Diff new.
    diff a:array1 b:array2.
    change := diff diff:false.
    diffHelper := DiffData new.
    [ change notNil ] whileTrue:[
        "check first lines which are same"
        (((change line0) > 0) and:[ ((change line1) > 0) ]) ifTrue:[
            [
                index1 <= (change line0)
            ] whileTrue:[
                helperText := (array1 at:index1) asText.
                text1 := text1 asString , helperText asString.
                index1 := index1 + 1.
            ].
            [
                index2 <= (change line1)
            ] whileTrue:[
                helperText := (array2 at:index2) asText.
                text2 := text2 , helperText.
                index2 := index2 + 1.
            ].
        ].
        ins := change inserted.
        del := change deleted.
        index1 := (change line0) + 1.
        index2 := (change line1) + 1.
         "find replace files "
        ((del > 0) and:[ ins > 0 ]) ifTrue:[
            helper := del - ins.
            (helper <= 0) ifTrue:[
                pom := change deleted.
            ].
            (helper > 0) ifTrue:[
                pom := change inserted.
            ].
             "its same count row"
            i := 1.
            [ i <= pom ] whileTrue:[
                changed add:index1 + addConstant1.
                text1 := text1 , (array1 at:index1) asString.
                text2 := text2 , (array2 at:index2) asString.
                index1 := index1 + 1.
                index2 := index2 + 1.
                del := del - 1.
                ins := ins - 1.
                i := i + 1.
            ].
        ].
         "find deleted files"
        (del > 0) ifTrue:[
            i := 1.
            [ i <= del ] whileTrue:[
                deleted add:index1 + addConstant1.
                text2 := text2 , Character cr.
                addConstant2 := addConstant2 + 1.
                text1 := text1 , (array1 at:index1) asString.
                index1 := index1 + 1.
                i := i + 1.
            ].
        ].
         "find inserted lines"
        (ins > 0) ifTrue:[
            i := 1.
            [ i <= ins ] whileTrue:[
                inserted add:index2 + addConstant2.
                text1 := text1 , Character cr.
                addConstant1 := addConstant1 + 1.
                text2 := text2 , (array2 at:index2) asString.
                index2 := index2 + 1.
                i := i + 1.
            ].
        ].
        change := change nextLink.
    ].
     "kontrola zda nam nechybi posledni znaky"
    (index1 <= (array1 size)) ifTrue:[
        [
            index1 <= (array1 size)
        ] whileTrue:[
            helperText := (array1 at:index1) asText.
            text1 := text1 , helperText.
            index1 := index1 + 1.
        ].
    ].
    (index2 <= (array2 size)) ifTrue:[
        [
            index2 <= (array2 size)
        ] whileTrue:[
            helperText := (array2 at:index2) asText.
            text2 := text2 , helperText.
            index2 := index2 + 1.
        ].
    ].
    diffHelper text1:text1.
    diffHelper text2:text2.
    diffHelper changed:changed.
    diffHelper inserted:inserted.
    diffHelper deleted:deleted.
    ^ diffHelper.

    "Modified: / 22-06-2010 / 21:02:50 / Jakub <zelenja7@fel.cvut.cz>"
    "Modified: / 24-06-2010 / 21:07:50 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!

createArray:text1 
    "Creates array from string where every row is one item"

    "^text1 asStringCollection"

    |helperText i item char array|

    item := ''.
    helperText := text1.
    array := OrderedCollection new.
    i := 1.
    [ i <= text1 size ] whileTrue:[
        char := helperText at:i.
        item := item , char.
        (char == Character cr) ifTrue:[
            array add:item.
            item := ''.
        ].
        i := i + 1.
    ].

    ^ array.

    "Created: / 22-03-2010 / 14:48:27 / Jakub <zelenja7@fel.cvut.cz>"
    "Modified: / 24-06-2010 / 13:40:58 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!DiffCodeView2::DiffData methodsFor:'accessing'!

changed

    ^changed copy

    "Modified: / 02-05-2010 / 19:31:18 / Jakub <zelenja7@fel.cvut.cz>"
    "Modified: / 16-07-2010 / 09:35:01 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!

changed:something
    changed := something.
!

deleted
    ^ deleted
!

deleted:something
    deleted := something.
!

inserted
    ^ inserted
!

inserted:something
    inserted := something.
!

text1
    ^ text1
!

text1:something
    text1 := something.
!

text2
    ^ text2
!

text2:something
    text2 := something.
! !

!DiffCodeView2 class methodsFor:'documentation'!

version_CVS
    ^ '$Header: /cvs/stx/stx/libtool/Tools__DiffCodeView2.st,v 1.1 2011-07-01 13:19:46 cg Exp $'
!

version_SVN
    ^ '§Id: Tools__DiffCodeView2.st 7594 2010-07-16 08:57:35Z vranyj1 §'
! !