"{ Package: 'jv:smallsense' }"

"{ NameSpace: SmallSense }"

EditSupport subclass:#JavaEditSupport
	instanceVariableNames:'lastTypedKey0 lastTypedKey1 lastTypedKey2 lastTypedKey3'
	classVariableNames:''
	poolDictionaries:''
	category:'SmallSense-Java'
!


!JavaEditSupport methodsFor:'accessing'!

language
    "superclass SmallSenseEditSupport says that I am responsible to implement this method"

    | javaLanguageClass |

    javaLanguageClass := Smalltalk at:#JavaLanguage.
    ^ javaLanguageClass notNil ifTrue:[ javaLanguageClass instance ] ifFalse: [ nil ].

    "Modified: / 04-10-2013 / 08:42:10 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!JavaEditSupport methodsFor:'accessing-classes'!

completionEngineClass
    "Returns a code completion engine class or nil, of 
     no completion is supported"

"/    OperatingSystem getLoginName = 'jv' ifTrue:[
"/        ^ SmallSense::JavaCompletionEngine
"/    ].
    ^ SmallSense::JavaCompletionEngineSimple

    "Created: / 03-10-2013 / 17:45:08 / Jan Vrany <jan.vrany@fit.cvut.cz>"
    "Modified: / 20-10-2013 / 02:53:24 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!

scannerClass
    "Returns a class to use for scanning lines. If nil, scanning is
     not supported and scanLine* methods will return an empty array."

    ^ (Smalltalk at: #JavaScanner)

    "Created: / 22-10-2013 / 00:38:49 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!JavaEditSupport methodsFor:'editing'!

insertElectricSnippet
    | tokens lastToken0 |

    tokens := self scanLineAtCursor.
    tokens isEmptyOrNil ifTrue:[ ^ false ].
    lastToken0 := tokens at: (tokens size - 3).
    lastToken0 = 'Error' ifTrue:[ ^ false ].
    (tokens last > service textView cursorCol) ifTrue:[ ^ false ].

    "/ Insert try { ... }
    lastToken0 == #try ifTrue:[
        (tokens size == 4 or:[(tokens size > 4) and:[(tokens at: tokens size -7) ~~ $.]]) ifTrue:[
            self insertElectricBlockOpenedBy: ' {' closedBy: '}'. 
            ^ true.
        ]
    ].

    "/ Insert catch (  ) { ... }
    lastToken0 == #catch ifTrue:[
        (tokens size > 4 and:[(tokens at: tokens size -7) == $}]) ifTrue:[
            | cursorLine cursorCol |
            cursorLine := service textView cursorLine.
            cursorCol := service textView cursorCol.
            self insertElectricBlockOpenedBy: ' (  ) {' closedBy: '}'. 
            service textView cursorLine: cursorLine  col: cursorCol + 3.
            ^ true.
        ].
    ].

    "/ Insert finally { ... }
    lastToken0 == #finally ifTrue:[
        (tokens size > 4 and:[(tokens at: tokens size -7) == $}]) ifTrue:[
            self insertElectricBlockOpenedBy: ' {' closedBy: '}'. 
            ^ true.
        ].
    ].

    "/ Insert if/while/synchronized ( )  { ... }
    (#(if while synchronized) includes: lastToken0) ifTrue:[
        (tokens size = 4) ifTrue:[
            | cursorLine cursorCol |
            cursorLine := service textView cursorLine.
            cursorCol := service textView cursorCol.
            self insertElectricBlockOpenedBy: ' (  ) {' closedBy: '}'. 
            service textView cursorLine: cursorLine  col: cursorCol + 3.
            ^ true.
        ].
    ].

    "/ Insert for ( ; ; )  { ... }
    (lastToken0 == #for) ifTrue:[
        (tokens size = 4) ifTrue:[
            | cursorLine cursorCol |
            cursorLine := service textView cursorLine.
            cursorCol := service textView cursorCol.
            self insertElectricBlockOpenedBy: ' ( ; ; ) {' closedBy: '}'. 
            service textView cursorLine: cursorLine  col: cursorCol + 3.
            ^ true.
        ].
    ].

    ^ false

    "Created: / 22-10-2013 / 01:53:24 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!JavaEditSupport methodsFor:'event handling'!

keyPress: key x:x y:y in: view

    "Handles an event in given view (a subview of codeView).
     If the method returns true, the event will not be processed
     by the view."

    view ~~ textView ifTrue:[ ^ false ].

    (self keyPressIgnored: key) ifTrue:[
        ^ true.
    ]. 

    lastTypedKey3 := lastTypedKey2.
    lastTypedKey2 := lastTypedKey1.
    lastTypedKey1 := lastTypedKey0.
    lastTypedKey0 := key.

    key == ${ ifTrue:[
        ^ self keyPressOpenCurly
    ].

    key == Character space ifTrue:[
        ^ self insertElectricSnippet
    ].

    ^ false

    "Created: / 07-03-2010 / 09:36:44 / Jan Vrany <jan.vrany@fit.cvut.cz>"
    "Modified: / 20-01-2014 / 09:20:28 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!

keyPressOpenCurly
    | line tokens i |

    line := service codeView listAt: service codeView cursorLine.
    line notEmptyOrNil ifTrue:[
        i := line size.
        [ i > 0 and:[(line at: i) isSeparator] ] whileTrue:[ i := i - 1 ].
        (i ~~ 0 and:[service codeView cursorCol < i]) ifTrue:[
            ^ false.        ].
    ] ifFalse:[
        self insertElectricBlockOpenedBy: '{' closedBy: '}'. 
        ^ true
    ].

    tokens := self scanLineAtCursor.
    tokens notEmptyOrNil ifTrue:[
        | column |

        column := service textView cursorCol.
        (tokens at: tokens size - 3) = 'Error' ifTrue:[ ^ false ].
        1 to: tokens size - 3 by: 4 do:[:i |
            (column between: (tokens at: i + 2) and: (tokens at: i + 3)) ifTrue:[
                (tokens at: i) == #String ifTrue:[ ^ false ].

                self insertElectricBlockOpenedBy: '{' closedBy: '}'. 
                ^ true.
            ].
        ].
    ].

    self insertElectricBlockOpenedBy: '{' closedBy: '}'. 
    ^ true

    "Created: / 04-08-2013 / 01:54:48 / Jan Vrany <jan.vrany@fit.cvut.cz>"
    "Modified: / 25-10-2013 / 18:03:24 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!JavaEditSupport methodsFor:'initialization'!

initializeForService: anEditService    
    super initializeForService: anEditService.
    service textView  autoIndent:true.

    "Created: / 27-09-2013 / 13:55:51 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!JavaEditSupport methodsFor:'private'!

tokenAtCursorLine
    | scanner token |

    scanner := (Smalltalk at:#JavaScanner) for: (service textView listAt: service textView cursorLine) string.

    [ 
        [ 
            token := scanner nextToken.
            (token ~~ #EOF and:[ scanner tokenEndPosition + 1 < service textView cursorCol ])
        ] whileTrue.
    ] on: Error do:[
        token := nil.
    ].
    ^ token

    "Created: / 04-08-2013 / 02:00:43 / Jan Vrany <jan.vrany@fit.cvut.cz>"
    "Modified: / 04-08-2013 / 03:10:40 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!

tokensAtCursorLine
    | scanner token |

    scanner := (Smalltalk at:#JavaScanner) for: (service textView listAt: service textView cursorLine) string.
    ^ OrderedCollection streamContents:[:tokens |
        [ token := scanner nextToken.token ~~ #EOF ] whileTrue:[
            tokens nextPut: token.
        ].
    ].

    "Created: / 04-08-2013 / 01:57:24 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!JavaEditSupport class methodsFor:'documentation'!

version_HG

    ^ '$Changeset: <not expanded> $'
! !