"

              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.

"

ListSelectionBox subclass:#FileSelectionBox

       instanceVariableNames:'patternField directory timeStamp directoryId

                              directoryContents directoryFileTypes'

       classVariableNames:''

       poolDictionaries:''

       category:'Views-Interactors'

!

FileSelectionBox comment:'

              All Rights Reserved

this class implements file selection boxes. They show a list of

files, and perform an action block with the selected pathname as

argument when ok is clicked.

written Jan 90 by claus

'!

!FileSelectionBox methodsFor:'initialization'!

initialize

    directory := FileDirectory currentDirectory.

    super initialize.

    labelField extent:(0.7 @ labelField height).

    labelField label:(resources string:'select a file:').

    labelField adjust:#left.

    patternField := EditField

                        origin:(0.7 @ labelField origin y)

                        corner:(1.0 @ labelField corner y)

                            in:self.

    patternField initialText:'*'.

    patternField leaveAction:[:p | self updateList].

    patternField hidden:true.

    "selections in list get forwarded to enterfield if not a directory;

     otherwise directory is changed"

    selectionList action:[:lineNr |

        |entry|

        entry := selectionList selectionValue.

        (entry endsWith:' ...') ifTrue:[

            entry := entry copyTo:(entry size - 4).

        ].

        ((directory typeOf:entry) == #directory) ifTrue:[

            self directory:(directory pathName , '/' , entry)

        ] ifFalse:[

            enterField contents:entry

        ]

    ]

    "FileSelectionBox new show"

!

reinitialize

    directory := FileDirectory currentDirectory.

    super reinitialize

! !

!FileSelectionBox methodsFor:'accessing'!

directory:nameOrDirectory

    "set the lists contents to the filenames in the directory name"

    |oldPath name|

    (nameOrDirectory isKindOf:String) ifTrue:[

        name := nameOrDirectory

    ] ifFalse:[

        name := nameOrDirectory pathName

    ].

    oldPath := directory pathName.

    directory pathName:name.

    (directory pathName = oldPath) ifFalse:[

        self updateList

    ]

!

pattern:aPattern

    patternField initialText:aPattern.

    patternField hidden:false.

    realized ifTrue:[

        patternField realize.

        self updateList

    ].

! !

!FileSelectionBox methodsFor:'private'!

updateList

    "set the lists contents to the filenames in the directory"

    |oldCursor oldListCursor files pattern newList index|

    oldCursor := cursor.

    oldListCursor := selectionList cursor.

    self cursor:(Cursor read).

    selectionList cursor:(Cursor read).

    directoryId == directory id ifFalse:[

        timeStamp := directory timeOfLastChange.

        directoryId := directory id.

        directoryContents := directory asText sort.

        ((directoryContents at:1) = '.') ifTrue:[

            directoryContents removeIndex:1

        ].

        directoryFileTypes := OrderedCollection new.

        directoryContents do:[:name | directoryFileTypes add:(directory typeOf:name)].

    ].

    files := directoryContents.

    pattern := patternField contents.

    newList := OrderedCollection new.

    index := 1.

    files do:[:name |

        (directoryFileTypes at:index) == #directory ifTrue:[

            name = '..' ifTrue:[

                newList add:name

            ] ifFalse:[

                newList add:(name , ' ...')

            ]

        ] ifFalse:[

            (pattern isEmpty or:[pattern match:name]) ifTrue:[

                newList add:name

            ]

        ].

        index := index + 1

    ].

    self list:newList.

    self cursor:oldCursor.

    selectionList cursor:oldListCursor

! !

!FileSelectionBox methodsFor:'events'!

show

    "make the box visible; redefined to check if directory is still 

     valid (using timestamp and inode numbers) - reread if not"

    (timeStamp isNil 

     or:[(directory timeOfLastChange > timeStamp) 

     or:[(directoryId isNil)

     or:[directoryId ~~ directory id]]]) ifTrue:[

        directoryId := nil.

        self updateList

    ].

    super show

! !

!FileSelectionBox methodsFor:'user interaction'!

okPressed

    "redefined, since action will be evaluated with full path as argument

     (instead of enterfields contents only as inherited by EnterBox"

    self hideAndEvaluate:[:string |

        okAction notNil ifTrue:[

            okAction value:(directory pathName , '/' , string)

        ]

    ]

! !