"

 COPYRIGHT (c) 1999 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:libwidg2' }"

HierarchicalList subclass:#HierarchicalFileList

	instanceVariableNames:'matchBlock showCursor mountPoints'

	classVariableNames:''

	poolDictionaries:''

	category:'Views-Support'

!

HierarchicalItem subclass:#HierarchicalFileItem

	instanceVariableNames:'fileName icon'

	classVariableNames:''

	poolDictionaries:''

	privateIn:HierarchicalFileList

!

HierarchicalFileList::HierarchicalFileItem subclass:#File

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:HierarchicalFileList

!

HierarchicalFileList::HierarchicalFileItem subclass:#Directory

	instanceVariableNames:'modificationTime'

	classVariableNames:''

	poolDictionaries:''

	privateIn:HierarchicalFileList

!

HierarchicalFileList::Directory subclass:#RemoteDirectory

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:HierarchicalFileList

!

!HierarchicalFileList class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1999 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.

"

! !

!HierarchicalFileList class methodsFor:'examples'!

examples

"

                                                                    [exBegin]

    |top sel list|

    list := HierarchicalFileList new.

    list directory:(Filename homeDirectory).

    list showRoot:false.

    list matchBlock:[:fn :isDir| true ].

    top := StandardSystemView new; extent:300@300.

    sel := ScrollableView for:HierarchicalListView miniScroller:true

                       origin:0.0@0.0 corner:1.0@1.0 in:top.

    sel list:list.

    list root expand.

    sel doubleClickAction:[:i| (list at:i) toggleExpand ].

    sel   indicatorAction:[:i| (list at:i) toggleExpand ].

    top open.

                                                                    [exEnd]

"

! !

!HierarchicalFileList class methodsFor:'helpers'!

itemFor:aFileOrDirectoryName fileType:fileType

    "instance creation helper

    "

    fileType == #directory ifTrue:[

        ^ Directory fileName:aFileOrDirectoryName.

    ].

    fileType == #remoteDirectory ifTrue:[

        ^ RemoteDirectory fileName:aFileOrDirectoryName.

    ].

    ^ File fileName:aFileOrDirectoryName.

! !

!HierarchicalFileList methodsFor:'accessing'!

directory

    "returns the root directory or nil

    "

    ^ root notNil ifTrue:[root fileName] ifFalse:[nil]

!

directory:aDirectory

    "set the root directory or nil

    "

    |directory|

"/    must explicitly enabled by user: ca

"/    monitoringTaskDelay := 1.

    (aDirectory notNil and:[(directory := aDirectory asFilename) exists]) ifTrue:[

        directory isDirectory ifFalse:[

            directory := directory directory

        ]

    ] ifFalse:[

        directory := nil

    ].

    directory = self directory ifFalse:[

        directory notNil ifTrue:[

            directory := self class itemFor:directory fileType:#directory 

        ].

        self root:directory

    ].

! !

!HierarchicalFileList methodsFor:'actions'!

matchBlock

    "set the matchBlock - if non-nil, it controls which files are visible.

    "

    ^ matchBlock

!

matchBlock:aBlock

    "set the matchBlock - if non-nil, it controls which files are visible.

    "

    matchBlock := aBlock.

    root notNil ifTrue:[

        self recursionLock critical:[

            self stopMonitoringTask.

            root matchBlockChanged.

        ].

        self startMonitoringTask.

    ].

! !

!HierarchicalFileList methodsFor:'private monitoring task'!

monitoringCycle

    "the block evaluated by the monitoring task; test whether directory is expanded

     otherwise we have not to evaluate the directory contents.

     think about remote file-systems

    "

    |index item mountInfo|

    mountPoints isNil ifTrue:[

        mountPoints := OperatingSystem mountPoints.

    ].

    item  := root.

    index := showRoot ifTrue:[1] ifFalse:[0].

    item isNil ifTrue:[

        item  := self at:index ifAbsent:nil.

    ].

    [item notNil] whileTrue:[

        item isDirectory ifTrue:[

            (item getChildren isNil) ifTrue:[

                "/ care for auto-mount points - we dont want to look into those automatically

                "/ i.e. user must explicitely click into them

                mountInfo := mountPoints detect:[:mInfo | mInfo mountPointPath = item fileName name] ifNone:nil.

                (mountInfo notNil and:[mountInfo isRemote]) ifTrue:[

                    "/ type := #remoteFileSystem.

                ] ifFalse:[

                    "/ must read children info

                    item readChildren

                ].

            ] ifFalse:[

                "/ children already initialized; thus we can update the contents

                item monitoringCycle

            ].

        ].

        Processor yield.

        index := index + 1.

        item  := self at:index ifAbsent:nil.

    ].

! !

!HierarchicalFileList methodsFor:'protocol'!

childrenFor:anItem

    "returns all visible children derived from the physical

     directory contents.

    "

    |contents list matchBlock|

    anItem isDirectory ifFalse:[^ #()].

    contents := DirectoryContents directoryNamed:(anItem fileName).

    contents ifNil:[ ^ #() ].

    list  := SortedCollection sortBlock:[:a :b| |res|

        a isDirectory == b isDirectory ifTrue:[ res := a baseName <= b baseName ]

                                      ifFalse:[ res := a isDirectory ].

        res

    ].

    matchBlock := self matchBlockFor:anItem.

    matchBlock isNil ifTrue:[

        matchBlock := [:fn :isDir | true].

    ].

    contents itemsDo:[:item |

        |fn isDir type|

        fn := item fileName.

        isDir := item isDirectory.

        (matchBlock value:fn value:isDir) ifTrue:[

            |hierarchicalItem|

            hierarchicalItem := self class itemFor:fn fileType:item type.

            list add:hierarchicalItem.

        ]

    ].

    list isEmpty ifTrue:[^ #()].

    ^ list asOrderedCollection

!

hasChildrenFor:anItem

    "returns true if the physical directory contains at least

     one visible item otherwise false.

    "

    |block|

    anItem isDirectory ifFalse:[

        ^ false

    ].

    (block := self matchBlockFor:anItem) isNil ifTrue:[

        block := [:aFilename :isDirectory| true ]

    ].

    ^ DirectoryContents directoryNamed:(anItem fileName) detect:block

!

iconFor:anItem

    "returns the icon for an item

    "

    (anItem isExpanded and:[anItem hasChildren]) ifTrue:[

        ^ FileBrowser iconForKeyMatching:#directoryOpen

    ].

    (anItem isRemoteDirectory) ifTrue:[

        ^ FileBrowser iconForKeyMatching:#directoryNetwork

    ].

    ^ FileBrowser iconForFile:(anItem fileName)

!

matchBlockFor:anItem

    "get the matchBlock - if non-nil, it controls which files are

     visible within the physical directory

    "

    ^ matchBlock        

!

validateIcon:anIcon for:anItem

    ^ anIcon

! !

!HierarchicalFileList methodsFor:'searching'!

detectItemFor:aPathOrFilename

    "make a filename visible

    "

    |file node p1 p2 sz|

    aPathOrFilename isNil ifTrue:[^ nil].

    file := aPathOrFilename asFilename.

    file exists ifFalse:[

        ^ nil

    ].

    (node := root) isNil ifTrue:[^ nil].

    p1 := node pathName.

    p2 := file pathName.

    (p2 startsWith:p1) ifFalse:[^ nil].

    sz := 1 + p1 size.

    (p1 last == Filename separator) ifFalse:[

        sz := sz + 1.

    ].

    p2 size > sz ifFalse:[^ nil].

    p2 :=  Filename components:(p2 copyFrom:sz).

    p2 do:[:bn|

        node := node detect:[:el| el baseName = bn] ifNone:nil.

        node isNil ifTrue:[^ nil ].

    ].

    ^ node

! !

!HierarchicalFileList::HierarchicalFileItem class methodsFor:'instance creation'!

fileName:aFileName

    "instance creation

    "

    ^ self new fileName:aFileName.

!

fileName:aFileName isDirectory:isDirectory

    "instance creation

    "

    |item|

    item := isDirectory ifTrue:[HierarchicalFileList::Directory new] ifFalse:[HierarchicalFileList::File new].

    item fileName:aFileName.

  ^ item

! !

!HierarchicalFileList::HierarchicalFileItem methodsFor:'accessing'!

baseName

    "returns the baseName

    "

    ^ fileName baseName.

"/    ^ baseName

!

fileName

    "returns the fileName

    "

    ^ fileName

!

fileName:fname

    "instance creation

    "

    fileName := fname.

"/    baseName := fname baseName.

!

icon

    "returns the icon key

    "

    |model|

    icon isNil ifTrue:[

        model := self model.

        model ifNil:[^ nil].

        icon := model iconFor:self.

        icon notNil ifTrue:[

            icon := model validateIcon:icon for:self

        ]

    ].

    ^ icon.

!

label

    "returns the printable name, the baseName

    "

    ^ self baseName

!

pathName

    "returns the pathName

    "

    ^ fileName pathName

! !

!HierarchicalFileList::HierarchicalFileItem methodsFor:'invalidate'!

invalidate

    "invalidate the contents

    "

    self invalidateRepairNow:false

!

invalidateRepairNow

    "invalidate the contents; repair now

    "

    self invalidateRepairNow:true

!

invalidateRepairNow:doRepair

    "invalidate the contents; dependent on the boolean

     do repair immediately

    "

!

matchBlockChanged

    "called if the matchBlock changed

    "

! !

!HierarchicalFileList::HierarchicalFileItem methodsFor:'printing'!

printString

    ^ super printString, ' for: ', self fileName asString

! !

!HierarchicalFileList::HierarchicalFileItem methodsFor:'queries'!

isDirectory

    ^ false

!

isRemoteDirectory

    ^ false

! !

!HierarchicalFileList::File methodsFor:'accessing'!

children

    "always returns an empty list

    "

    ^ #()

! !

!HierarchicalFileList::File methodsFor:'queries'!

hasChildren

    "always returns false

    "

    ^ false

! !

!HierarchicalFileList::Directory methodsFor:'accessing'!

children

    "returns the list of children

    "

    |model|

    children notNil ifTrue:[

        ^ children

    ].

    (model := self model) isNil ifTrue:[

        "/ must reread later

        modificationTime := children := nil.

        ^ nil

    ].

    true "readDirectoriesChildrenInBackground" ifTrue:[

        model triggerUpdateCycle.

        ^ nil.

    ].

self halt.

    self readChildren.

    ^ children

!

readChildren

    "reads the list of children

    "

    |model list|

    (model := self model) isNil ifTrue:[

        "/ must reread later

        modificationTime := children := nil.

        ^ nil

    ].

    children := #().

    modificationTime := fileName modificationTime.