"

 COPYRIGHT (c) 1995 by Claus Gittinger

              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.

"

ThreeColumnTextView subclass:#Diff3TextView

	instanceVariableNames:'useColors showSeparators addedColor addedBgColor removedColor

		removedBgColor changedColor changedBgColor'

	classVariableNames:''

	poolDictionaries:''

	category:'Views-Text'

!

copyright

"

 COPYRIGHT (c) 1995 by Claus Gittinger

              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.

"

!

documentation

"

    a view showing merged diff3 (see rcsmerge / merge unix manual pages) output in a 

    user-friendly form.

    The view is created and opened with:

       d := Diff3TextView openOn:text label:l1 label:l2 label:l3.

    and it will show the 3 versions side-by-side

    Its main use is for the SourceCodeManager, to show merged sources after

    a failed checkin.

"

! !

openOnMergedText:text label:firstLabel label:secondLabel label:thirdLabel

    "open up a view showing firstText, secondText and thirdText side-by-side,

     and labels for all views."

    |top v l1 l2 l3|

    top := StandardSystemView label:'three texts'.

    l1 := Label label:firstLabel in:top.

    l1 origin:0.0@0.0 corner:0.33@(l1 height).

    l2 := Label label:secondLabel in:top.

    l2 origin:0.33@0.0 corner:0.67@(l1 height).

    l3 := Label label:thirdLabel in:top.

    l3 origin:0.67@0.0 corner:1.0@(l1 height).

    v := HVScrollableView 

               for:self 

               miniScrollerH:true miniScrollerV:false

               in:top.

    v origin:0.0 @ (l1 height + ViewSpacing) corner:1.0 @ 1.0.

    v scrolledView updateListsFromMergedText:text.

    ^ top open

    "

     ThreeColumnTextView

        openOn:('smalltalk.rc' asFilename contentsOfEntireFile)

        label:'smalltalk.rc'

        and:('display.rc' asFilename contentsOfEntireFile)

        label:'display.rc'

        and:('private.rc' asFilename contentsOfEntireFile)

        label:'private.rc'

    "

    "Modified: 12.12.1995 / 13:09:13 / cg"

! !

!Diff3TextView methodsFor:'initialization'!

initStyle

    super initStyle.

    showSeparators := false.

    useColors := ColoredListEntry notNil.

    useColors ifTrue:[

	device hasColors ifTrue:[

	    addedColor := Color black.

	    addedBgColor := Color green.

	    removedColor := Color white.

	    removedBgColor := Color red.

	    changedColor := Color white.

	    changedBgColor := Color blue.

	] ifFalse:[

	    addedBgColor := removedBgColor := changedBgColor := Color black.

	    addedColor := removedColor := changedColor := Color white.

	]

    ].

    "Created: 16.11.1995 / 16:59:48 / cg"

    "Modified: 12.12.1995 / 12:25:55 / cg"

! !

!Diff3TextView methodsFor:'private'!

updateListsFromMergedText:mergedText

    "given the merge()/rcsmerge() merged output (as created by 'cvs update'),

     update my views contents"

    |idx1 idx2 idx3 dIdx dEnd state s nr1 nr2 nr3 entry c l1 l2 l3  

     textView1 textView2 textView3 skip max|

    textView1 := textViews at:1.

    textView2 := textViews at:2.

    textView3 := textViews at:3.

    l1 := OrderedCollection new.

    l2 := OrderedCollection new.

    l3 := OrderedCollection new.

    idx1 := 1.

    idx2 := 1.

    idx3 := 1.

    dIdx := 1.

    dEnd := mergedText size + 1.

    state := #initial.

    [dIdx < dEnd] whileTrue:[

        dIdx == dEnd ifTrue:[

            "dummy cleanup entry"

            entry := nil.

            state := #initial.

        ] ifFalse:[

            entry := mergedText at:dIdx.

            dIdx := dIdx + 1.

        ].

        state == #initial ifTrue:[

            "

             fill up to size difference from previous change

            "

            max := (l1 size max:l2 size) max:l3 size.

            [l1 size < max] whileTrue:[

                l1 add:nil

            ].

            [l2 size < max] whileTrue:[

                l2 add:nil

            ].

            [l3 size < max] whileTrue:[

                l3 add:nil

            ].

            "

             except for the first chunk, add a separating line

            "

            l1 size ~~ 0 ifTrue:[

                showSeparators ifTrue:[

                    l1 add:'--------'.

                    l2 add:'--------'.

                    l3 add:'--------'.

                ]

            ].

        ].

        skip := false.

        entry notNil ifTrue:[

            (entry startsWith:'<<<<<<<') ifTrue:[

                state := 1. skip := true.

            ] ifFalse:[

                (entry startsWith:'|||||||') ifTrue:[

                    state := 2. skip := true.

                ] ifFalse:[

                    (entry startsWith:'=======') ifTrue:[

                        state == 2 ifFalse:[

                            state := 23        "/ on both 2 and 3

                        ] ifTrue:[

                            state := 3         "/ only in 3

                        ].

                        skip := true.

                    ] ifFalse:[

                        (entry startsWith:'>>>>>>>') ifTrue:[

                            state := #initial.

                            skip := true.

                        ]

                    ]

                ]

            ].

            skip ifFalse:[

                (state == #initial or:[state == 1]) ifTrue:[

                    (useColors and:[state == 1]) ifTrue:[

                        l1 add:(ColoredListEntry string:entry foregroundColor:changedColor backgroundColor:changedBgColor).

                    ] ifFalse:[

                        l1 add:entry

                    ]

                ].

                (state == #initial or:[state == 2 or:[state == 23]]) ifTrue:[

                    (useColors and:[state == 2 or:[state == 23]]) ifTrue:[

                        l2 add:(ColoredListEntry string:entry foregroundColor:changedColor backgroundColor:changedBgColor).

                    ] ifFalse:[

                        l2 add:entry

                    ]

                ].

                (state == #initial or:[state == 3 or:[state == 23]]) ifTrue:[

                    (useColors and:[state == 3 or:[state == 23]]) ifTrue:[

                        l3 add:(ColoredListEntry string:entry foregroundColor:changedColor backgroundColor:changedBgColor).

                    ] ifFalse:[

                        l3 add:entry

                    ]

                ].

            ].

        ].

    ].

    textView1 list:l1.

    textView2 list:l2.

    textView3 list:l3.

    "Modified: 13.12.1995 / 19:56:32 / cg"

! !

version

! !