"{ Package: 'jv:smallsense' }"

Tools::CodeHighlightingService subclass:#SmallSenseSyntaxHighlightingService

	instanceVariableNames:'lastLineFromChanged lastLineToChanged lastContentsList'

	classVariableNames:''

	poolDictionaries:''

	category:'SmallSense-Services'

!

!SmallSenseSyntaxHighlightingService class methodsFor:'accessing'!

label

    "Answers a short label - for UI"

    ^'SmallSense - Syntax Highlighting'

    "Created: / 27-07-2013 / 22:46:20 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!SmallSenseSyntaxHighlightingService methodsFor:'change & update'!

sourceChanged:force

    ^self sourceChanged: force from: nil to: nil.

    "Created: / 27-07-2013 / 22:52:01 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

sourceChanged:force from:start to:end    

    "Called when codeview's text changes"

    (force or:[codeView reallyModified]) ifTrue:[

        (start notNil and: [end notNil and:[start > end]]) ifTrue:[

            lastLineFromChanged  := lastLineToChanged := nil.

        ] ifFalse:[

            lastLineFromChanged := start.

            lastLineToChanged := end.   

        ].

        self process

    ].

    "Created: / 27-07-2013 / 22:51:44 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 03-08-2013 / 13:00:32 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

update:aspect with:param from:sender

    "Invoked when an object that I depend upon sends a change notification."

    textView notNil ifTrue:[

        (sender == textView and:[aspect == #sizeOfContents]) ifTrue:[

"/            self halt.

"/            lastContentsList ~~ textView list ifTrue:[

"/                lastContentsList := textView list.

"/                self sourceChanged:true.

"/                textView instVarNamed: #suppressNotifications put: false.

"/            ].

            ^self.

        ].  

    ].

    super update:aspect with:param from:sender

    "Modified: / 03-08-2013 / 12:39:16 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!SmallSenseSyntaxHighlightingService methodsFor:'event handling'!

linesDeletedFrom:start to:end 

    self sourceChanged:true from:start to:end

    "Created: / 27-07-2013 / 22:51:14 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

linesInsertedFrom:start to:end 

    self sourceChanged:true from:start to:end

    "Created: / 27-07-2013 / 22:51:05 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

linesModifiedFrom:start to:end 

    self sourceChanged:true from:start to:end

    "Created: / 27-07-2013 / 22:50:59 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!SmallSenseSyntaxHighlightingService methodsFor:'initialization'!

initialize

    job := (Smalltalk at:#BackgroundQueueProcessingJob) 

                named:self defaultJobName

                on:[:interval |

                    Error handle:[:ex |

                        (Dialog confirm:('Error while processing source:\\',ex description,'\\Debug ?') withCRs)

                        ifTrue:[

                            ex reject.

                        ]

                    ] do:[

                        self process:true changed: interval

                    ]

                ].

    "Created: / 03-08-2013 / 11:08:58 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!SmallSenseSyntaxHighlightingService methodsFor:'private'!

setHighlightedLine: line at: lineNr

    |firstShown lastShown anyChange replaceAction list|

    "textView" modified ifTrue:[

        "/ new input arrived in the meantime

        ^ self

    ].

"/    done ifFalse:[

"/        "/ another coloring process has already been started.

"/        "/ ignore this (leftover) code.

"/        ^ self

"/    ].

    firstShown := textView firstLineShown.

    lastShown := textView lastLineShown.

    replaceAction := [:lNr :line |

            |oldLine|

            oldLine :=  list at:lNr ifAbsent:nil.

            oldLine notNil ifTrue:[

                line notNil ifTrue:[

                    "/ this check is needed - there is a race

                    "/ when the text is converted. This detects the

                    "/ resulting error.

                    "/ Certainly a kludge.

                    oldLine string = line string ifTrue:[

                        | i |

                        "JV@2012-02-01: Remove any emphasis on leading whitespace"

                        "(presumably created by LintHighlighter)"

                        i := line string indexOfNonSeparator.

                        i > 1 ifTrue:[

                            | e |

                            (e := (line emphasisAt: i - 1)) notNil ifTrue:[

                                line emphasisFrom: 1 to: i - 1 remove: e.

                            ]

                        ].

                        oldLine emphasis ~= line emphasis ifTrue:[

                            textView modifiedChannel removeDependent:self.

                            list at:lNr put:line.

                            textView modifiedChannel addDependent:self.

                            (lNr between:firstShown and:lastShown) ifTrue:[

                                anyChange ifFalse:[

                                    anyChange := true.

                                ].

                                textView redrawLine:lNr

                            ]

                        ]

                    ]

                ]

            ]

        ].

    list := textView list.  

    replaceAction value: lineNr value: line.

    gutterView invalidate.

"/    Transcript showCR:'--> rehighlighted ', self identityHash printString.

    "Created: / 03-08-2013 / 23:49:02 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 04-08-2013 / 00:55:46 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!SmallSenseSyntaxHighlightingService methodsFor:'processing'!

process

    "(Re)starts the processing job. Should be called whenever a source 

     must be (re)processed."

    | browser |

    (self syntaxHighlighters isEmptyOrNil) ifTrue:[

        "No higlighter, nothing to do"

        ^self

    ].   

    "/ this clobbers the codeViews modified state; therefore, we have to remember

    "/ this info somewhere ...

    (browser := codeView browser) notNil ifTrue:[

        textView modified ifTrue:[

            browser navigationState realModifiedState: true

        ].

        textView modifiedChannel setValue:false.

    ].

    ((lastLineFromChanged isNil and:[lastLineToChanged isNil]) 

        or:[lastLineFromChanged == 1 and:[lastLineToChanged == textView size]]) ifTrue:[

        job stopAndRemoveAll.

        job add: nil.

    ] ifFalse:[

        job add:(lastLineFromChanged to:lastLineToChanged).

    ]

    "Created: / 03-08-2013 / 11:07:42 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 06-08-2013 / 03:41:16 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

process: delayed

    ^self process: delayed changed: nil.

    "Created: / 27-07-2013 / 22:53:14 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 03-08-2013 / 11:11:27 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

process: delayed changed: interval

    |oldCode oldCodeList newCode newCodeList newCodeRefetch newCodeListRefetch elements cls mthd highlighters|

    done := false.

    modified := false.

    codeView syntaxElements: nil.

    codeView syntaxElementSelection: nil.

    highlighters := self syntaxHighlighters.

    cls := codeView klass.

    (cls notNil and:[cls isObsolete]) ifTrue:[

        cls isMeta ifTrue:[

            cls := (Smalltalk at:cls theNonMetaclass name) class

        ] ifFalse:[

            cls := Smalltalk at:cls name

        ].

    ].

    mthd := codeView methodHolder value.

    "textView" modified ifFalse:[

        oldCodeList := textView list copy.

        "textView" modified ifFalse:[

            oldCodeList isNil ifFalse:[

                oldCode := oldCodeList asStringWithoutEmphasis.

                "textView" modified ifFalse:[

                    Screen currentScreenQuerySignal answer:codeView device do:[

                        Parser parseErrorSignal handle:[:ex |

                            |errMsg|

                            errMsg := ex description asStringCollection first asString.

                            "/ Transcript topView raiseDeiconified.

                            "/ Transcript showCR:'ParseError: ', ex description.

"/ self halt.

                            "/ self showInfo:(errMsg colorizeAllWith:Color red).

                            newCode := nil.

                        ] do:[

                            | codeAspect |

                            elements := ParseTreeIndex new.

                            codeAspect := codeView codeAspect.

                            "/ switch codeAspect

                            "/ case method

                                codeAspect == SyntaxHighlighter codeAspectMethod ifTrue:[

                                    (highlighters first respondsTo:#formatMethod:source:line:number:in:using:) ifTrue:[

                                        newCodeList := oldCodeList.

                                        newCode := newCodeList asString.

                                    ] ifFalse:[

                                        newCodeList := oldCode asStringCollection.

                                        newCode := oldCode asText. 

                                    ].

                                    newCodeListRefetch := [].

                                    newCodeRefetch := [].

                                    highlighters do:[:h|

                                        (interval notNil and:[h respondsTo:#formatMethod:source:line:number:in:using:]) ifTrue:[

                                            newCodeListRefetch value.   

                                            interval do:[:lnr |

                                                | ln |

                                                ln := newCodeList at: lnr ifAbsent:[nil].

                                                ln notEmptyOrNil ifTrue:[

                                                    | nln |

                                                    nln := h formatMethod:mthd source:newCode line: ln string number: lnr in:cls using:syntaxPreferences.

                                                    nln ~~ ln ifTrue:[

                                                        delayed ifTrue:[

                                                            codeView sensor 

                                                                pushUserEvent:#setHighlightedLine:at:

                                                                for:self

                                                                withArguments:(Array with:nln with: lnr).                                                                                                                                                                                                                     

                                                        ] ifFalse:[

                                                           self setHighlightedLine: nln at: lnr.

                                                        ].

                                                        newCodeList at: lnr put: nln.

                                                       newCodeListRefetch := [].

                                                       newCodeRefetch := [ newCode := newCodeList asString. newCodeListRefetch := [] ].   

                                                    ]

                                                ]

                                            ].

                                        ] ifFalse:[

                                            newCodeRefetch value.

                                            newCode := h formatMethod:mthd source:newCode in:cls using:syntaxPreferences elementsInto: elements.

                                            newCodeListRefetch := [ newCodeList := newCode asStringCollection. newCodeRefetch := [] ].

                                            newCodeRefetch := [  ].

                                        ].

                                    ].

                                ] ifFalse:[

                            "/ case expession

                                codeAspect == (SyntaxHighlighter codeAspectExpression) ifTrue:[

                                    newCodeList := oldCode asStringCollection.

                                    newCode := oldCode asText.

                                    highlighters do:[:h|

                                        newCodeRefetch value.

                                        newCode := h formatExpression:newCode in:cls elementsInto: elements.

                                        newCodeListRefetch := [ newCodeList := newCode asStringCollection. newCodeRefetch := [] ].

                                        newCodeRefetch := [  ].

                                    ].

                                ] ifFalse:[

                            "/case class definition

                               codeView codeAspect == #classDefinition ifTrue:[

                                    (highlighters first respondsTo:#formatClassDefinition:line:number:in:) ifTrue:[

                                         newCodeList := oldCodeList.

                                         newCode := newCodeList asString.

                                    ] ifFalse:[

                                         newCodeList := oldCode asStringCollection.

                                         newCode := oldCode asText. 

                                    ].

                                    newCodeListRefetch := [].

                                    newCodeRefetch := [].

                                    highlighters do:[:h|

                                       (interval notNil and:[h respondsTo:#formatClassDefinition:line:number:in:]) ifTrue:[

                                            newCodeListRefetch value.

                                            interval do:[:lnr |

                                                | ln |

                                                ln := oldCodeList at: lnr ifAbsent:[nil].

                                                ln notEmptyOrNil ifTrue:[

                                                    | nln |

                                                    nln := h formatClassDefinition:newCode line: ln string number: lnr in:cls.

                                                    nln ~~ ln ifTrue:[

                                                        delayed ifTrue:[

                                                            codeView sensor 

                                                                pushUserEvent:#setHighlightedLine:at:

                                                                for:self

                                                                withArguments:(Array with:nln with: lnr).                                                                                                 

                                                       ] ifFalse:[

                                                           self setHighlightedLine: nln at: lnr.

                                                       ].

                                                       newCodeList at: lnr put: nln.

                                                       newCodeListRefetch := [].

                                                       newCodeRefetch := [ newCode := newCodeList asString. newCodeListRefetch := [] ].   

                                                    ]

                                                ]

                                            ].

                                        ] ifFalse:[

                                            newCodeRefetch value.

                                            newCode := h formatClassDefinition:newCode in:cls elementsInto: elements.

                                            newCodeListRefetch := [ newCodeList := newCode asStringCollection. newCodeRefetch := [] ].

                                            newCodeRefetch := [  ].

                                        ]

                                   ].

                               ]]].

                        ]

                    ].

                    newCode notNil ifTrue:[

                        "textView" modified ifFalse:[

                            newCode ~= oldCodeList ifTrue:[

                                newCode := newCode asStringCollection.

                                "textView" modified ifFalse:[

                                    done := true.

                                    textView notNil ifTrue:[

                                        "/ must add this event - and not been interrupted

                                        "/ by any arriving key-event.

                                        "/ self showInfo:nil.

                                        delayed ifTrue:[

                                            codeView sensor

                                                pushUserEvent:#setHighlightedCode:elements:

                                                for:self

                                                withArguments:(Array with:newCode with: elements).

                                                "/self delayedUpdateBufferLabelWithCheckIfModified

                                        ] ifFalse:[

                                            textView contents: newCode.

                                            codeView syntaxElements: elements.

                                            gutterView invalidate.

                                        ]

                                    ]

                                ]

                            ].

                        ]

                    ]

                ] "/ ---

            ]

        ]

    ]

    "Created: / 03-08-2013 / 11:11:07 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 06-08-2013 / 11:43:09 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!SmallSenseSyntaxHighlightingService class methodsFor:'documentation'!

version_HG

    ^ '$Changeset: <not expanded> $'

! !