"

 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:libcomp' }"

Parser subclass:#AbstractSyntaxHighlighter

	instanceVariableNames:'method sourceText preferences fullSelectorCheck'

	classVariableNames:''

	poolDictionaries:''

	category:'System-Compiler'

!

!AbstractSyntaxHighlighter 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.

"

!

documentation

"

    common superclass for (smalltalk-) syntax highlighting.

"

! !

!AbstractSyntaxHighlighter class methodsFor:'api highlighting'!

formatClassDefinition:aString in:aClass

    "format (recolor) a class definition expression in a given class.

     Return the text containing font changes and color information."

    ^ self formatExpression:aString in:aClass

!

formatClassDefinition:aString in:aClass elementsInto: elements

    "format (recolor) a class definition expression in a given class.

     Return the text containing font changes and color information."

    ^ self formatExpression:aString in:aClass

    "Created: / 10-04-2011 / 18:18:28 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

formatExpression:aString in:aClass

    "format (recolor) an expression in a given class.

     Return the text containing font changes and color information."

    |parser tree text endPos|

    aString isNil ifTrue:[^ nil].

    parser := self for:(ReadStream on:aString string) in:aClass.

    parser ignoreErrors:true.

    parser ignoreWarnings:true.

    parser sourceText:(text := aString string asText).

    "/ use an array here - this can be changed much faster using #at:put:

    text emphasisCollection:(Array new:aString size).

    parser nextToken.

    tree := parser expression.

    "/ now, convert the emphasis-array to a runArray

    text emphasisCollection:(text emphasis asRunArray).

    tree == #Error ifTrue:[

        "/ mhmh - which is better ...

        "/ alternative1: color rest after error in red

"/        text 

"/            emphasizeFrom:(parser sourceStream position) 

"/            to:text size 

"/            with:(#color->Color red).

        "/ alternative2: take original emphasis for rest

        endPos := parser sourceStream position + 1.

        endPos >= text size ifTrue:[

            ^ text

        ].

        ^ (text copyTo:endPos) , (aString copyFrom:(endPos+1))

        "/ alternative3: no emphasis for rest.

"/        ^ text "/ aString

    ].

    ^ text

    "

     self

        formatExpression:'(1 + 2) max:5' 

        in:UndefinedObject

    "

    "Modified: / 7.4.1998 / 09:57:19 / cg"

    "Created: / 9.4.1998 / 16:57:16 / cg"

!

formatMethod:aString in:aClass

    <resource: #obsolete>

    "format (recolor) a method in a given class.

     Return the text containing font changes and color information."

    self obsoleteMethodWarning:'use #formatMethodSource:in:'.

    ^ self formatMethod:nil source:aString in:aClass using:nil

    "

     self

        formatMethod:'foo 

    ^ self bar:''hello''.

    ' , (Character doubleQuote asString) , 'some comment' , (Character doubleQuote asString) , '

'

        in:UndefinedObject

    "

    "Modified: / 28-04-2010 / 13:03:04 / cg"

!

formatMethod:aString in:aClass using:preferencesOrNil

    <resource: #obsolete>

    "format (recolor) a method in a given class.

     Return the text containing font changes and color information."

    self obsoleteMethodWarning:'use #formatMethodSource:in:using:'.

    ^ self formatMethod:nil source:aString in:aClass using:preferencesOrNil

    "Modified: / 28-04-2010 / 13:03:15 / cg"

!

formatMethod:methodOrNil source:aString in:aClass

    "format (recolor) a method in a given class.

     Return the text containing font changes and color information."

    ^ self formatMethod:methodOrNil source:aString in:aClass using:nil

    "

     self

        formatMethod:'foo 

    ^ self bar:''hello''.

    ' , (Character doubleQuote asString) , 'some comment' , (Character doubleQuote asString) , '

'

        in:UndefinedObject

    "

    "Created: / 28-04-2010 / 13:44:24 / cg"

!

formatMethod:methodOrNil source:aString in:aClass using:preferencesOrNil

    "format (recolor) a method in a given class.

     Return the text containing font changes and color information."

    |highlighter tree text endPos eColor|

    aString isNil ifTrue:[^ nil].

    Error handle:[:ex |

        Transcript showCR:ex description.

        self breakPoint:#cg.

        ex creator isHandled ifTrue:[

            ex reject.    

        ].

        (ParseError handles:ex) ifFalse:[

            "Parse error may happen when re-formatting incomplete code while editing"

            ('SyntaxHighlighter [info]: error during highlight: ' , ex description) infoPrintCR.

            "/ ex suspendedContext fullPrintAll.

        ].

        ^ aString

    ] do:[

        highlighter := self for:(ReadStream on:aString string) in:aClass.    

        highlighter method:methodOrNil.

        preferencesOrNil notNil ifTrue:[highlighter preferences:preferencesOrNil].

        "/ highlighter ignoreErrors:true.

        highlighter ignoreWarnings:true.

        highlighter sourceText:(text := aString string asText).

        "/ use an array here - this can be changed much faster using #at:put:

        text emphasisCollection:(Array new:aString size).

        tree := highlighter parseMethod.

        "/ now, convert the emphasis-array to a runArray

        text emphasisCollection:(text emphasis asRunArray).

        tree == #Error ifTrue:[

            eColor := UserPreferences current errorColor.

            eColor notNil ifTrue:[

                "/ mhmh - which is better ...

                "/ alternative1: color rest after error in red

                text 

                    emphasizeFrom:(highlighter sourceStream position + 1) 

                    to:text size 

                    with:(#color->eColor).

            ] ifFalse:[

                "/ alternative2: take original emphasis for rest

                endPos := highlighter sourceStream position + 1.

                endPos >= text size ifTrue:[

                    ^ text

                ].

                ^ (text copyTo:endPos) , (aString copyFrom:(endPos+1))

            ].

            "/ alternative3: no emphasis for rest.

        ].

        ^ text

    ]

    "

     self

        formatMethod:'foo 

    ^ self bar:''hello''.

    ' , (Character doubleQuote asString) , 'some comment' , (Character doubleQuote asString) , '

'

        in:UndefinedObject

    "

    "Created: / 28-04-2010 / 13:01:42 / cg"

    "Modified: / 05-07-2011 / 11:22:20 / cg"

!

formatMethod:aMethodOrNil source:aString in:aClass using:preferencesOrNil elementsInto: elements

    ^ self formatMethod:aMethodOrNil source:aString in:aClass using:preferencesOrNil

    "Created: / 05-07-2011 / 10:41:14 / cg"

    "Modified: / 20-07-2011 / 16:29:57 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

formatMethodSource:aString in:aClass

    "format (recolor) a method in a given class.

     Return the text containing font changes and color information."

    ^ self formatMethod:nil source:aString in:aClass using:nil

    "

     self

        formatMethod:'foo 

    ^ self bar:''hello''.

    ' , (Character doubleQuote asString) , 'some comment' , (Character doubleQuote asString) , '

'

        in:UndefinedObject

    "

    "Created: / 28-04-2010 / 12:58:13 / cg"

!

formatMethodSource:aString in:aClass using:preferencesOrNil

    "format (recolor) a method in a given class.

     Return the text containing font changes and color information."

    ^ self formatMethod:nil source:aString in:aClass using:preferencesOrNil

    "Modified: / 28-04-2010 / 13:02:11 / cg"

! !

!AbstractSyntaxHighlighter class methodsFor:'misc'!

collectionEnumerationSelectors

    "these are considered wellknown, builtin selectors of very common

     collection enumeration methods. 

     These are optionally shown with another color (dark green)"

    ^ #(

        collect: 

        select:

        inject:into:

        count:

        collect:thenSelect:

        select:thenCollect:

    )

    "Created: / 14-02-2012 / 15:56:59 / cg"

!

controlFlowSelectors

    "these are considered wellknown, builtin selectors of very common

     control flow constructs. Correspond to syntax or special forms in other

     languages. These are optionally shown with another color (blue)"

    ^ #(

        ifTrue: ifFalse:

        ifTrue:ifFalse: ifFalse:ifTrue:

        ifNil: ifNotNil:

        ifNil:ifNotNil: ifNotNil:ifNil:

        and: or:

        whileTrue:

        whileFalse:

        to:do:

        downTo:do:

        to:by:do:

        loop

        whileTrue

        whileFalse

        doWhile:

        doUntil:

        do:

        doWithIndex:

        pairWiseDo:

        keysAndValuesDo:

        withPriority:do:

        handle:do:

        on:do:

        catch:

        ignoreIn:

        "/ newProcess

        fork:

        ensure:

        ifCurtailed:

        valueOnUnwindDo:

        valueNowOrOnUnwindDo:

        caseOf:

        caseOf:otherwise:

    )

    "Created: / 08-09-2006 / 15:56:47 / cg"

!

debugSelectors

    "these are considered harmful if left in a deployed application:

     selectors for debugging which open a debugger (unless haltSignal is

     cought or disabled, which end-user apps should do). 

     These are optionally shown with another color (redish)"

    ^ #(

        halt halt:

    )

    "Modified (comment): / 27-07-2013 / 11:45:07 / cg"

!

errorRaisingSelectors

    "these are error raisers. 

     These are optionally shown with another color (red)"

    ^ #(

        error error:

        raise raiseRequest:

        raiseErrorString: raiseRequestErrorString:

        raiseWith: raiseRequestWith:

        raiseWith:errorString: raiseRequestWith:errorString:

        subclassResponsibility

        obsoleteMethodWarning obsoleteMethodWarning:

    )

!

isControlFlowSelector:aSelector

    "these are considered wellknown, builtin selectors of very common

     control flow constructs. Correspond to syntax or special forms in other

     languages. These are optionally shown with another color (blue)"

    (self controlFlowSelectors includesIdentical:aSelector) ifTrue:[^ true].

    true "((aSelector startsWith:'with') or:[ aSelector startsWith:'all'])" ifTrue:[

        ((aSelector endsWith:'do:') or:[ aSelector endsWith:'Do:']) ifTrue:[

            ^ true

        ]

    ].

    ^ false.

! !

!AbstractSyntaxHighlighter class methodsFor:'utilities'!

mark:sourceText from:pos1 to:pos2 withAddedEmphasis:addedEmphasis

    sourceText emphasisFrom:pos1 to:pos2 add:addedEmphasis

    "Created: / 01-06-2012 / 21:43:36 / cg"

!

mark:sourceText from:pos1 to:pos2 withEmphasis:fontEmp color:clrIn

    |e p2 clr|

    (clrIn isNil or:[clrIn = Color black]) ifTrue:[

        e := fontEmp

    ] ifFalse:[

        clr := clrIn onDevice:Screen current.

        fontEmp isNil ifTrue:[

            e := (#color->clr)

        ] ifFalse:[

            e := Text addEmphasis:fontEmp to:(#color->clr).

        ]

    ].

    (p2 := pos2) isNil ifTrue:[

        p2 := sourceText size

    ] ifFalse:[

        p2 := p2 min:sourceText size

    ].

    sourceText emphasizeFrom:pos1 to:p2 with:e

    "Created: / 01-06-2012 / 21:42:41 / cg"

!

mark:sourceText from:pos1 to:pos2 withEmphasis:fontEmp color:fgClr1 ifNil:fgClr2 backgroundColor:bgClr

    |e p2 clr fgClr|

    fgClr := fgClr1 ? fgClr2.

    (fgClr isNil or:[fgClr = Color black]) ifTrue:[

        e := fontEmp

    ] ifFalse:[

        clr := fgClr onDevice:Screen current.

        fontEmp isNil ifTrue:[

            e := (#color->clr)

        ] ifFalse:[

            e := Text addEmphasis:fontEmp to:(#color->clr).

        ]

    ].

    bgClr notNil ifTrue:[

        e := Text addEmphasis:(#backgroundColor->bgClr) to:e.

    ].

    (p2 := pos2) isNil ifTrue:[

        p2 := sourceText size

    ] ifFalse:[

        p2 := p2 min:sourceText size

    ].

    sourceText emphasizeFrom:pos1 to:p2 with:e

    "Created: / 01-06-2012 / 21:44:17 / cg"

! !

!AbstractSyntaxHighlighter methodsFor:'accessing'!

method:aMethod

    "the original method, if known (for subclasses which can make use of it)"

    method := aMethod.

    "Created: / 28-04-2010 / 13:15:33 / cg"

!

preferences:something

    preferences := something.

!

sourceText

    ^ sourceText

    "Created: / 31.3.1998 / 11:49:05 / cg"

!

sourceText:aString

    sourceText := aString.

    "Created: / 31-03-1998 / 11:49:05 / cg"

    "Modified: / 28-04-2010 / 13:22:27 / cg"

! !

!AbstractSyntaxHighlighter methodsFor:'error handling'!

parseError:aMessage position:position to:endPos

"/ Transcript showCR:aMessage.

    super parseError:aMessage position:position to:endPos.

    self 

        markFrom:position to:endPos 

        withEmphasis:nil color:UserPreferences current errorColor

!

showErrorMessage:aMessage position:pos

"/ Transcript showCR:aMessage.

    super showErrorMessage:aMessage position:pos.

    self 

        markFrom:pos to:nil 

        withEmphasis:nil color:UserPreferences current errorColor

!

syntaxError:aMessage position:position to:endPos

"/ Transcript showCR:aMessage.

    super syntaxError:aMessage position:position to:endPos.

    self 

        markFrom:position to:endPos 

        withEmphasis:nil color:UserPreferences current errorColor

!

warning:msg position:pos1 to:pos2

"/    self markUnknownIdentifierFrom:pos1 to:pos2