"{ Encoding: utf8 }"

"

stx:goodies/smallsense - A productivity plugin for Smalltalk/X IDE

Copyright (C) 2013-2014 Jan Vrany

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

"

"{ Package: 'stx:goodies/smallsense' }"

"{ NameSpace: SmallSense }"

EditSupport subclass:#SmalltalkEditSupport

	instanceVariableNames:'lastTypedKey0 lastTypedKey1 lastTypedKey2 lastTypedKey3'

	classVariableNames:''

	poolDictionaries:''

	category:'SmallSense-Smalltalk'

!

!SmalltalkEditSupport class methodsFor:'documentation'!

copyright

"

stx:goodies/smallsense - A productivity plugin for Smalltalk/X IDE

Copyright (C) 2013-2014 Jan Vrany

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

"

! !

!SmalltalkEditSupport class methodsFor:'utilities'!

indent: text by: level

    ^ String streamContents:[ :out |

        | in |

        in := text readStream.

        [ in atEnd ] whileFalse:[

            in peek == Character cr ifTrue:[

                out nextPut: in next.

                out spaces: level.

            ] ifFalse:[

                out nextPut: in next.

            ].

        ].

    ]

    "Created: / 04-05-2014 / 23:29:57 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

undent: stringOrStringCollection

    | lines indent tabwidth ignoreIndentOfFirstLineIfZero indentOfFirstLineIsZero |

    stringOrStringCollection isStringCollection ifTrue:[

	ignoreIndentOfFirstLineIfZero := false.

	stringOrStringCollection removeLast.

	lines := stringOrStringCollection.

    ] ifFalse:[

	ignoreIndentOfFirstLineIfZero := true.

	lines := stringOrStringCollection asStringCollection.

    ].

    tabwidth := (ListView userDefaultTabPositions = ListView tab4Positions) ifTrue:[ 4 ] ifFalse: [ 8 ].

    indent := nil.

    indentOfFirstLineIsZero := false.

    1 to: lines size do:[:lineNo |

	| line lineIndent |

	line := lines at: lineNo.

	lineIndent := line indexOfNonSeparator.

	(lineIndent ~~ 0) ifTrue:[

	    indent isNil ifTrue:[

		indent := ((lineIndent - 1) // tabwidth) * tabwidth.

	    ] ifFalse:[

		indent := (((lineIndent - 1) // tabwidth) * tabwidth) min: indent.

	    ].

	    indent == 0 ifTrue:[

		(lineNo == 1 and:[ignoreIndentOfFirstLineIfZero]) ifTrue:[

		    indent := nil.

		    indentOfFirstLineIsZero := true.

		] ifFalse:[

		    ^ stringOrStringCollection isStringCollection

			ifTrue:[ stringOrStringCollection asStringWithoutFinalCR ]

			ifFalse:[ stringOrStringCollection ]

		].

	    ].

	].

    ].

    1 to: lines size do:[:lineNr |

	(lineNr ~~ 1 or:[indentOfFirstLineIsZero not]) ifTrue:[

	    lines at: lineNr put: ((lines at: lineNr) copyFrom: indent + 1).

	].

    ].

    ^ lines asStringWithoutFinalCR

    "Created: / 04-05-2014 / 23:09:35 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 23-07-2014 / 23:24:18 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!SmalltalkEditSupport methodsFor:'accessing'!

language

    "superclass SmallSenseEditorSupport says that I am responsible to implement this method"

    ^SmalltalkLanguage instance

    "Modified: / 24-07-2013 / 23:46:42 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!SmalltalkEditSupport methodsFor:'accessing-classes'!

completionEngineClass

    ^ SmalltalkCompletionEngine

    "Created: / 02-10-2013 / 13:30:50 / 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."

    ^ Scanner

    "Created: / 22-10-2013 / 00:39:01 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!SmalltalkEditSupport methodsFor:'editing'!

electricInsert:stringOrLines advanceCursorBy:offsetOrNil

    | ignore |

    (stringOrLines isString and:[ stringOrLines first == lastTypedKey0 ]) ifTrue:[

	ignore := stringOrLines copyFrom:2.

    ].

    ^ self

	    electricInsert:stringOrLines

	    advanceCursorBy:offsetOrNil

	    ignoreKeystrokes:ignore

    "Created: / 20-01-2014 / 09:27:00 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

electricInsertSnippet

    lastTypedKey0 == Character space ifTrue:[

	^ self electricInsertSnippetAfterSpace

    ].

    lastTypedKey0 == $: ifTrue:[

	^ self electricInsertSnippetAfterDoubleColon

    ].

    ^ false.

    "Created: / 22-10-2013 / 02:55:37 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

electricInsertSnippetAfterDoubleColon

    | tokens  lastToken0  lastValue0 |

    tokens := self scanLineAtCursor.

    tokens isEmptyOrNil ifTrue:[

	^ false

    ].

    lastToken0 := tokens at:(tokens size - 3).

    lastToken0 = 'Error' ifTrue:[

	^ false

    ].

    (tokens last > service textView cursorCol) ifTrue:[

	^ false

    ].

    ((lastToken0 == #Identifier)

	and:[ (service textView cursorCol - 1) == tokens last ])

	    ifTrue:[

		lastValue0 := tokens at:tokens size - 2.

		tokens size > 4 ifTrue:[

		    (#( #do #select #reject #detect #contains #allSatisfy #anySatisfy )

			includes:lastValue0)

			    ifTrue:[

				| collectionName  eachName  space  part1  part2 |

				space := RBFormatter spaceAfterKeywordSelector ifTrue:[

					' '

				    ] ifFalse:[ '' ].

				eachName := 'each'.

				tokens size > 4 ifTrue:[

				    ((collectionName := tokens at:tokens size - 6) last = $s) ifTrue:[

					(collectionName endsWith:'ses') ifTrue:[

					    eachName := collectionName copyButLast:2

					] ifFalse:[

					    eachName := collectionName copyButLast:1

					].

				    ].

				].

				part1 := ':' , space , '[:' , eachName , ' | '.

				part2 := ' ]'.

				self electricInsert:part1 , part2 advanceCursorBy:part1 size.

				^ true.

			    ].

		    RBFormatter spaceAfterKeywordSelector ifTrue:[

			self electricInsert:': '.

			^ true.

		    ]

		].

	    ].

    ^ false.

    "Created: / 22-10-2013 / 03:05:35 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 22-10-2013 / 12:00:14 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

electricInsertSnippetAfterSpace

    | tokens  lastToken0  lastValue0 |

    tokens := self scanLineAtCursor.

    tokens isEmptyOrNil ifTrue:[

	^ false

    ].

    lastToken0 := tokens at:(tokens size - 3).

    lastToken0 = 'Error' ifTrue:[

	^ false

    ].

    (tokens last > service textView cursorCol) ifTrue:[

	^ false

    ].

    lastToken0 == #Keyword ifTrue:[

	lastValue0 := tokens at:tokens size - 2.

	tokens size > 4 ifTrue:[

	    (#( #do: #select: #reject: #detect: #contains: #allSatisfy: #anySatisfy: )

		includes:lastValue0)

		    ifTrue:[

			| collectionName  eachName  part1  part2 |

			eachName := 'each'.

			tokens size > 4 ifTrue:[

			    ((collectionName := tokens at:tokens size - 6) last = $s) ifTrue:[

				(collectionName endsWith:'ses') ifTrue:[

				    eachName := collectionName copyButLast:2

				] ifFalse:[

				    eachName := collectionName copyButLast:1

				].

			    ].

			].

			part1 := ' [:' , eachName , ' | '.

			part2 := ' ]'.

			self electricInsert:part1 , part2 advanceCursorBy:part1 size.

			^ true.

		    ].

	]

    ].

    ^ false.

    "Created: / 22-10-2013 / 03:00:36 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 23-05-2014 / 11:28:19 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!SmalltalkEditSupport 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 == #CodeCompletion ifTrue:[

	| controller |

	(controller := self textView completionSupport) notNil ifTrue:[

	    ^ controller handleKeyPress:key x:x y:y

	].

	^ false

    ].

    key == #BackSpace ifTrue:[

	backspaceIsUndo ifTrue:[

	     textView undo.

	     backspaceIsUndo := false.

	     ^ true.

	].

    ].

    backspaceIsUndo := false.

    key == #Paste ifTrue:[

	^ self keyPressPaste.

    ].

    key == $^ ifTrue:[

	^ self keyPressReturnToken

    ].

    key == #Return ifTrue: [

	^ self keyPressReturn

    ].

    key == $: ifTrue: [

	^ self keyPressDoubleColon.

    ].

    key == $= ifTrue: [

	^ self keyPressEqual

    ].

    key == Character space ifTrue:[

	^ self electricInsertSnippet

    ].

    key == $[ ifTrue:[

	^ self keyPressOpenBracket.

    ].

    ^ false.

    "Created: / 07-03-2010 / 09:36:44 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 18-05-2014 / 12:45:26 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

keyPressDoubleColon

    ^ self electricInsertSnippetAfterDoubleColon

    "Created: / 22-10-2013 / 03:08:53 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

keyPressEqual

    | line |

    line := textView listAt:textView cursorLine.

    line isNil ifTrue:[ ^ false ].

    line := line string.

    line size > textView cursorCol ifTrue: [ ^ false ].

    line size < (textView cursorCol - 1) ifTrue: [ ^ false ].

    (line at: textView cursorCol - 1) == $: ifTrue: [

	self electricInsert:'= '.

	^ true

    ].

    ^ false

    "Created: / 22-10-2013 / 11:01:03 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

keyPressOpenBracket

    "Opening `[` has been pressed. Complete closing bracket and position

     cursor in between them, but only of there's no other text on current line"

    | line |

    line := textView listAt: textView cursorLine.

    line notNil ifTrue:[

	line := line string.

	line size > textView cursorCol ifTrue: [

	    line size downTo: textView cursorCol - 1 do:[:i |

		(line at:i) == Character space ifFalse:[ ^ false ].

	    ]

	].

    ].

    RBFormatter spaceAfterBlockStart ifTrue:[

	RBFormatter spaceBeforeBlockEnd ifTrue:[

	    self electricInsert:'[  ]' advanceCursorBy: 2.

	] ifFalse:[

	    self electricInsert:'[ ]' advanceCursorBy: 2.

	].

    ] ifFalse:[

	RBFormatter spaceBeforeBlockEnd ifTrue:[

	    self electricInsert:'[ ]' advanceCursorBy: 1.

	] ifFalse:[

	    self electricInsert:'[]' advanceCursorBy: 1.

	].

    ].

    ^ true.

    "Created: / 22-01-2014 / 21:35:21 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 29-01-2014 / 10:30:52 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

keyPressPaste

    | textSelected textPasted currentLineNo currentLine currentLineIsEmpty |

    (UserPreferences current smallSenseSmalltalkIndentOnPasteEnabled == true) ifFalse:[ ^ false ].

    textView checkModificationsAllowed ifTrue:[

	textSelected := textPasted := textView getTextSelectionOrTextSelectionFromHistory.

	currentLineNo := textView currentLine.

	currentLineIsEmpty := true.

	((currentLineNo > textView list size)

	    or:[ (currentLine := textView list at: currentLineNo) isNil

		or:[ (currentLineIsEmpty := currentLine indexOfNonSeparator == 0) ]]) ifTrue:[

		    | indent |

		    currentLineIsEmpty ifTrue:[

			indent := textView leftIndentForLine: currentLineNo.

			textView setCursorCol: indent + 1.

		    ].

		    textPasted := self class undent: textPasted.

		    textPasted := self class indent: textPasted by: textView cursorCol - 1.

		].

	textView undoablePasteOrReplace: textPasted info: nil.

    ].

    ^ true

    "Created: / 03-05-2014 / 01:08:21 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 19-07-2014 / 00:13:31 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

keyPressReturn

    | line tokens c i t currentLineIndent closingBracketIndex |

    line := textView listAt: textView cursorLine.

    line isNil ifTrue:[ ^ false ].

    line := line string.

    "/ Check whether there is any text afer cursor

    "/ except of single closing `]`. If there's some text

    "/ don't do anything smart. If there's only single closing

    "/ ']', then remeber it.

    closingBracketIndex := 0.

    line size > textView cursorCol ifTrue: [

	line size downTo: ((textView cursorCol - 1) max: 1) do:[:i |

	    (c :=line at:i) == Character space ifFalse:[

		(c == $] and:[closingBracketIndex == 0]) ifTrue:[

		    closingBracketIndex := i.

		] ifFalse:[

		    ^ false

		].

	    ].

	]

    ].

    (line indexOfAny:'[|/') == 0 ifTrue:[ ^ false ].

    "/ Insert "/ at the beggining of the line if current line starts with "/

    i := currentLineIndent := line indexOfNonSeparator.

    (i ~~ 0 and:[ i < line size and:[(line at:i) == $" and:[(line at:i + 1) == $/]]]) ifTrue:[

	"/ OK, current line contains eol-comment. Split into

	"/ two actions so backspace deletes only the inserted '"/ ' text

	self electricInsert:#( '' '' ) advanceCursorBy:(1 @ i).

	self electricInsert:'"/ '.

	^ true

    ].

    "/ Now insert/reindent closing bracket ( ']' ) for block, byt only

    "/ if current preference is C-style blocks

    RBFormatter cStyleBlocks ifFalse:[ ^ false ].

    "/ There are two possible cases:

    "/ (i)  there is no single closing bracket on the line, then

    "/      add closing ] but only iff last typed character is

    "/      either [ or |  !!!!!!!! Otherwise we would get annoying behaviour

    "/      when there's already valid code and someone position cursor after

    "/      opening bracket and press enter.

    "/ (ii) there's single closing bracket on current line

    "/      (closingBracketIndex is non-zero)

    (closingBracketIndex == 0 and:[('[|' includes: lastTypedKey1) not]) ifTrue:[ ^ false ].

    i := textView cursorCol - 1.

    [ (line at: i) isSeparator and:[i > 0] ] whileTrue:[ i := i - 1 ].