Squeak-dev August 2017

squeak-dev@lists.squeakfoundation.org

42 participants
86 discussions

MQTT for Squeak?
by tim Rowledge 02 Feb '18

02 Feb '18

I’m having all sorts of fun making some weather station and environmental sensors with assorted Pi and ESP8266 boards and I need a nice way to make the sensor nodes report back to base. Since the ESP8266 modules don’t run squeak (shame!) I’m using Arduino-c++ (blech) on them, and since the weather sensor code already existed in python (double-blech) I’m using that on the weather-pi board. I’ve been recommended to look at MQTT as a way to bind them all together and from what little sense I can make of the assorted stuff that googling had lead me to (good grief, so much acronym laden gibberish) it looks like it might do the job. Googling for a squeak mqtt package has revealed nothing thus far so I’m now appealing to the list for any news. tim -- tim Rowledge; tim(a)rowledge.org; http://www.rowledge.org/tim Useful Latin Phrases:- O! Plus! Perge! Aio! Hui! Hem! = Oh! More! Go on! Yes! Ooh! Ummm!

8 28

app in app
by Chuck Smith 31 Jan '18

31 Jan '18

Dear Squeakers, I have always had a hard time learning anything until I had a project to do it around. Well that time has come. I need to write an app. that will let me run one application inside another. I would like to have a cad type app. running in a window and then be able to over lay that cad app. with another app. that lets me put hot spots on the cad app. These hot spots will have the ability to show a colored outline around their perimeter. That outline we would like to be able to turn on and off or make blink. The purpose of the hot spot is to train people how to use the cad app. by showing them where to pick menu items and enter data etc. So the whole things runs like this, we start the cad app. and the tutor app. The tutor app. step by step shows the student where and what bottoms to pic and where and what data to enter. As they enter etc. the app. actually functions and they are able to create in the cad app. Kind of a training wheel effect. Can any one tell whether or not I could do this in Squeak and kind of help me do it. I do have a nephew who is a good programmer but has never used Squeak of small Talk and I would like to get him help me do this app. start using Squeak. Can any one point in the right direction? I would like to do the same thing for learning Squeak. Once we learn how to do it for the cad app. I will do it for the Squeak community and make it free. Sincerely, Chuck Smith

4 4

Removing of Universe classes
by H. Hirzel 26 Jan '18

26 Jan '18

On 11/25/15, Frank Shearar <frank.shearar(a)gmail.com> wrote: > On 24 November 2015 at 21:09, H. Hirzel <hannes.hirzel(a)gmail.com> wrote: >> On 11/21/15, Chris Muller <asqueaker(a)gmail.com> wrote: >>> On Fri, Nov 20, 2015 at 12:40 PM, tim Rowledge <tim(a)rowledge.org> wrote: >>>> I suggest we should Universes. >>> +1. +1. +1 and, +1. .. > > I was under the impression that Universes _was removed_, like, back in > 4.4 or the beginning of the 4.5 cycle, when I was up to my eyeballs in > hairy dependencies... Certainly the build processes think so - > https://github.com/squeak-smalltalk/squeak-ci/blob/master/package-load-scri… > is the _load script_ for Universes (implying its _unloaded by default_ > state). > > frank > >> I think this has been discussed before the release of 4.6 and people >> agreed but at that time it was to late to do it. >> >> --Hannes >> > > Hi Frank Indeed I do not see a Universe browser in the app menu of Squeak 5.0. However there seem to be some classes left in the system, see screen shot. So there was removal but it seems it was not done completely.

9 14

List of all global variables? (Environments?)
by H. Hirzel 30 Dec '17

30 Dec '17

Hello The recipe: How to list all global variables [1] has the code snippet Smalltalk keys select: [:k | ((Smalltalk at: k) isKindOf: Class) not] thenCollect: [:k | k -> (Smalltalk at: k) class] to give a list of global variables. When executing this code the recommendation is to use Smalltalk globals instead of Smalltalk keys A rewrite because of Environments not having #select:thenCollect: (I do not think that is necessary) then is (Smalltalk globals select: [:k | ((Smalltalk at: k) isKindOf: Class) not]) collect: [:k | k -> (Smalltalk at: k) class] Then I get 'key not found: ExtendedNumberParser'. I wonder what is going on here ... Regards Hannes [1] http://wiki.squeak.org/squeak/1824

5 12

"repository editions" is finally permanent!
by Chris Muller 23 Oct '17

23 Oct '17

"repository editions" is finally permanent! This function formerly known as "mc history" appeared in 2013, but was clunky and unreliable and I didn't have time to fix it. Now with the recent server upgrade, I took the opportunity to upgrade the image to modern trunk, running under spur, with integration of the editions feature from directly within the image. It is now finally a permanent part of our source.squeak.org code repository. (Go ahead, try it!) It self-hosts its own code within our "ss" project. This is the exact same code loaded by the Personal Squeaksource package. Together can provide editions for ALL code (trunk and proprietary). The 'mc history' menu was recently renamed to "browse repository editions" because its only "history" if its retrieving them from the trunk repository. It selects from the first repository in the repository list of a package which can satisfy the editions request, so if you put inbox above trunk then you'll be looking at a list of "alternate editions" of that method (or class) existing in the Inbox, not the "history" from trunk. The new "demote to bottom" menu item can be used to adjust the order of the list. Nicolas wrote: > so you mean that we now browse all editions, including those which are not > in current MC version ancestors: > - those in concurrent branches Yes. And, I think this was always supported (when it worked!) -- In the server there is one big dictionary per Project (e.g., one for "trunk", one for "VMMaker", one for "inbox", etc.). The editions you see in the list are instances of MCMethodDefinition or MCClassDefinition which are keyed simply by their #description -- so for method editions this is {className. selector. classIsMeta}, and for class editions, simply its (class) name. Its valued by an OrderedCollection of all the editions. (hmm, that key might be too loose..) > - those in other packages (if the method was moved from one package to > another) So, yes, as long as the other package is in the same repository, they'll still be keyed by their same #description's. On Tue, 1 Nov 2016, Hans-Martin Mosner wrote: > Looks like there is a regression with raised and inset borders. The method #initialize in SimpleBorder sets baseColor to > ... snip... > > Levente, the method is from April 2016 and carries your initials - do you remember what the motivation for this change was? I'd been wanting encourage Hans-Martin to test this real-world use case for "browse origin" for the last weeks, now we finally can! :) 1) Bring up SimpleBorder, select the #initialize method. 2) Select "browse repository editions", a window with two editions is presented. 3) Select the one being asked about, "ul 4/7/2016 20:10" and select "browse origin". NOTE: "browse origin" is actually just "the earliest-known Version in which that definition appears." If a proper repository with all versions is kept, then it will be the origin. In this case, it appears Levente wrote very good "why" reasoning in the notes. _____ The timeouts should all be fixed. Our code repository has never been in a better shape than now. Please feel free to use browse repository editions and origins with confidence they will work! Cheers! Chris

4 7

The Inbox: EToys-hjh.279.mcz
by commits＠source.squeak.org 12 Oct '17

12 Oct '17

A new version of EToys was added to project The Inbox: http://source.squeak.org/inbox/EToys-hjh.279.mcz ==================== Summary ==================== Name: EToys-hjh.279 Author: hjh Time: 22 February 2017, 11:23:24.984746 am UUID: 3f908905-74c3-4c1c-931c-7b440b143602 Ancestors: EToys-dtl.278 Two steps towards loading an EToys projects dropped on to the desktop. Change StandardScriptingSystem>>baseColor StandardScriptingSystem>>borderColor to use UserInterfaceTheme current instead of the old direct access to Preferences. =============== Diff against EToys-dtl.278 =============== Item was changed: ----- Method: StandardScriptingSystem>>baseColor (in category '*Etoys-Squeakland-tile colors') ----- baseColor + ^ (UserInterfaceTheme current get: #titleColor for: #MenuMorph) ifNil: [ Color transparent]! - ^ Preferences menuTitleColor! Item was changed: ----- Method: StandardScriptingSystem>>borderColor (in category '*Etoys-Squeakland-tile colors') ----- borderColor + ^ (UserInterfaceTheme current get: #borderColor for: #MenuMorph) ifNil: [(Color r: 0.2 g: 0.3 b: 0.9)]! - ^ Preferences menuBorderColor!

3 4

The Trunk: EToys-nice.292.mcz
by commits＠source.squeak.org 10 Oct '17

10 Oct '17

Nicolas Cellier uploaded a new version of EToys to project The Trunk: http://source.squeak.org/trunk/EToys-nice.292.mcz ==================== Summary ==================== Name: EToys-nice.292 Author: nice Time: 15 April 2017, 3:44:39.800437 pm UUID: 39acfe15-791f-41c6-8aad-d679664643e7 Ancestors: EToys-eem.291 Remove the Multi*Scanner, MultiNewParagraph, MultiComposer because they have no additional value. =============== Diff against EToys-eem.291 =============== Item was changed: SystemOrganization addCategory: #'Etoys-Buttons'! SystemOrganization addCategory: #'Etoys-CustomEvents'! SystemOrganization addCategory: #'Etoys-Experimental'! SystemOrganization addCategory: #'Etoys-Outliner'! SystemOrganization addCategory: #'Etoys-Protocols'! SystemOrganization addCategory: #'Etoys-Protocols-Type Vocabularies'! SystemOrganization addCategory: #'Etoys-Scripting'! SystemOrganization addCategory: #'Etoys-Scripting Support'! SystemOrganization addCategory: #'Etoys-Scripting Tiles'! SystemOrganization addCategory: #'Etoys-Squeakland-BroomMorphs-Base'! SystemOrganization addCategory: #'Etoys-Squeakland-BroomMorphs-Connectors'! SystemOrganization addCategory: #'Etoys-Squeakland-EToys-Kedama'! SystemOrganization addCategory: #'Etoys-Squeakland-Etoys-Buttons'! SystemOrganization addCategory: #'Etoys-Squeakland-Etoys-Calendar'! SystemOrganization addCategory: #'Etoys-Squeakland-Etoys-Debugger'! SystemOrganization addCategory: #'Etoys-Squeakland-Etoys-Help'! SystemOrganization addCategory: #'Etoys-Squeakland-Etoys-Input'! SystemOrganization addCategory: #'Etoys-Squeakland-Etoys-Scripting'! SystemOrganization addCategory: #'Etoys-Squeakland-Etoys-Scripting Support'! SystemOrganization addCategory: #'Etoys-Squeakland-Etoys-Scripting Tiles'! SystemOrganization addCategory: #'Etoys-Squeakland-Etoys-SpeechBubbles'! SystemOrganization addCategory: #'Etoys-Squeakland-Etoys-Tile Scriptors'! SystemOrganization addCategory: #'Etoys-Squeakland-Graphics-External'! SystemOrganization addCategory: #'Etoys-Squeakland-Graphics-Text'! SystemOrganization addCategory: #'Etoys-Squeakland-Graphics-Tools-Intersection'! SystemOrganization addCategory: #'Etoys-Squeakland-Graphics-Tools-Simplification'! SystemOrganization addCategory: #'Etoys-Squeakland-Graphics-Tools-Triangulation'! SystemOrganization addCategory: #'Etoys-Squeakland-MorphicExtras-AdditionalMorphs'! SystemOrganization addCategory: #'Etoys-Squeakland-MorphicExtras-Charts'! SystemOrganization addCategory: #'Etoys-Squeakland-MorphicExtras-Postscript Filters'! SystemOrganization addCategory: #'Etoys-Squeakland-MorphicExtras-WebCam'! SystemOrganization addCategory: #'Etoys-Squeakland-MorphicExtras-Widgets'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Basic'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Books'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Components'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Demo'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Experimental'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Games'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Games-Chess'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-GeeMail'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Kernel'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Mentoring'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Navigators'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-PartsBin'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-PDA'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Support'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Widgets'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Windows'! SystemOrganization addCategory: #'Etoys-Squeakland-Morphic-Worlds'! SystemOrganization addCategory: #'Etoys-Squeakland-Multilingual-Languages'! - SystemOrganization addCategory: #'Etoys-Squeakland-Multilingual-Scanning'! SystemOrganization addCategory: #'Etoys-Squeakland-Multilingual-TextConversion'! SystemOrganization addCategory: #'Etoys-Squeakland-Network-HTML-Formatter'! SystemOrganization addCategory: #'Etoys-Squeakland-Network-HTML-Forms'! SystemOrganization addCategory: #'Etoys-Squeakland-Network-HTML-Parser'! SystemOrganization addCategory: #'Etoys-Squeakland-Network-HTML-Parser Entities'! SystemOrganization addCategory: #'Etoys-Squeakland-Network-HTML-Tokenizer'! SystemOrganization addCategory: #'Etoys-Squeakland-Network-MIME'! SystemOrganization addCategory: #'Etoys-Squeakland-Network-TelNet WordNet'! SystemOrganization addCategory: #'Etoys-Squeakland-Network-UI'! SystemOrganization addCategory: #'Etoys-Squeakland-Network-Url'! SystemOrganization addCategory: #'Etoys-Squeakland-Protocols-Type Vocabularies'! SystemOrganization addCategory: #'Etoys-Squeakland-Sound-Interface'! SystemOrganization addCategory: #'Etoys-Squeakland-Sound-Ogg'! SystemOrganization addCategory: #'Etoys-Squeakland-Sound-Scores'! SystemOrganization addCategory: #'Etoys-Squeakland-ST80-Morphic'! SystemOrganization addCategory: #'Etoys-Squeakland-SUnit'! SystemOrganization addCategory: #'Etoys-Squeakland-Sugar'! SystemOrganization addCategory: #'Etoys-Squeakland-System-Clipboard-Extended'! SystemOrganization addCategory: #'Etoys-Squeakland-System-Compiler'! SystemOrganization addCategory: #'Etoys-Squeakland-System-Exceptions Kernel'! SystemOrganization addCategory: #'Etoys-Squeakland-System-Support'! SystemOrganization addCategory: #'Etoys-Squeakland-Tools-Changes'! SystemOrganization addCategory: #'Etoys-Squeakland-Tools-Explorer'! SystemOrganization addCategory: #'Etoys-Squeakland-Tools-File Contents Browser'! SystemOrganization addCategory: #'Etoys-Squeakland-Tools-Process Browser'! SystemOrganization addCategory: #'Etoys-Squeakland-Tweak-Kedama-ObjectVectors'! SystemOrganization addCategory: #'Etoys-Squeakland-Tweak-Kedama-ParseTreeTransformer'! SystemOrganization addCategory: #'Etoys-Squeakland-Tweak-Kedama-ParseTree-AttributeDefinition'! SystemOrganization addCategory: #'Etoys-Stacks'! SystemOrganization addCategory: #'Etoys-StarSqueak'! SystemOrganization addCategory: #'Etoys-Support'! SystemOrganization addCategory: #'Etoys-Tests'! SystemOrganization addCategory: #'Etoys-Tile Scriptors'! SystemOrganization addCategory: #'Etoys-Widgets'! SystemOrganization addCategory: #'Etoys-Squeakland-Support'! SystemOrganization addCategory: #'Etoys-Squeakland-SISS-Serialization'! SystemOrganization addCategory: #'Etoys-OLPC-Display'! SystemOrganization addCategory: #'Etoys-ReleaseBuilder'! SystemOrganization addCategory: #'Etoys-UserInterfaceTheme'! Item was removed: - ----- Method: GrafPort>>displayScannerForMulti:foreground:background:ignoreColorChanges: (in category '*Etoys-Squeakland-accessing') ----- - displayScannerForMulti: para foreground: foreColor background: backColor ignoreColorChanges: shadowMode - - ((para isMemberOf: MultiNewParagraph) or: [para text string isByteString]) ifTrue: [ - ^ (MultiDisplayScanner new text: para presentationText textStyle: para textStyle - foreground: foreColor background: backColor fillBlt: self - ignoreColorChanges: shadowMode) - setPort: self clone - ]. - ^ (DisplayScanner new text: para text textStyle: para textStyle - foreground: foreColor background: backColor fillBlt: self - ignoreColorChanges: shadowMode) - setPort: self clone - ! Item was removed: - MultiCharacterScanner subclass: #MultiCanvasCharacterScanner - instanceVariableNames: 'canvas fillBlt foregroundColor runX lineY' - classVariableNames: '' - poolDictionaries: '' - category: 'Etoys-Squeakland-Multilingual-Scanning'! Item was removed: - ----- Method: MultiCanvasCharacterScanner>>canvas: (in category 'accessing') ----- - canvas: aCanvas - "set the canvas to draw on" - canvas ifNotNil: [ self inform: 'initializing twice!!' ]. - canvas := aCanvas! Item was removed: - ----- Method: MultiCanvasCharacterScanner>>cr (in category 'stop conditions') ----- - cr - "When a carriage return is encountered, simply increment the pointer - into the paragraph." - - lastIndex := lastIndex + 1. - ^false! Item was removed: - ----- Method: MultiCanvasCharacterScanner>>crossedX (in category 'stop conditions') ----- - crossedX - "This condition will sometimes be reached 'legally' during display, when, - for instance the space that caused the line to wrap actually extends over - the right boundary. This character is allowed to display, even though it - is technically outside or straddling the clipping ectangle since it is in - the normal case not visible and is in any case appropriately clipped by - the scanner." - - "self fillLeading." - ^ true ! Item was removed: - ----- Method: MultiCanvasCharacterScanner>>displayLine:offset:leftInRun: (in category 'scanning') ----- - displayLine: textLine offset: offset leftInRun: leftInRun - | nowLeftInRun done startLoc startIndex stopCondition | - "largely copied from DisplayScanner's routine" - - line := textLine. - foregroundColor ifNil: [ foregroundColor := Color black ]. - leftMargin := (line leftMarginForAlignment: alignment) + offset x. - - rightMargin := line rightMargin + offset x. - lineY := line top + offset y. - lastIndex := textLine first. - leftInRun <= 0 - ifTrue: [self setStopConditions. "also sets the font" - nowLeftInRun := text runLengthFor: lastIndex] - ifFalse: [nowLeftInRun := leftInRun]. - runX := destX := leftMargin. - - runStopIndex := lastIndex + (nowLeftInRun - 1) min: line last. - spaceCount := 0. - done := false. - - [done] whileFalse: [ - "remember where this portion of the line starts" - startLoc := destX@destY. - startIndex := lastIndex. - - "find the end of this portion of the line" - stopCondition := self scanCharactersFrom: lastIndex to: runStopIndex - in: text string rightX: rightMargin stopConditions: stopConditions - kern: kern "displaying: false". - - "display that portion of the line" - canvas drawString: text string - from: startIndex to: lastIndex - at: startLoc - font: font - color: foregroundColor. - - "handle the stop condition" - done := self perform: stopCondition - ]. - - ^runStopIndex - lastIndex! Item was removed: - ----- Method: MultiCanvasCharacterScanner>>doesDisplaying (in category 'private') ----- - doesDisplaying - ^false "it doesn't do displaying using copyBits"! Item was removed: - ----- Method: MultiCanvasCharacterScanner>>endOfRun (in category 'stop conditions') ----- - endOfRun - "The end of a run in the display case either means that there is actually - a change in the style (run code) to be associated with the string or the - end of this line has been reached." - | runLength | - - lastIndex = line last ifTrue: [^true]. - runX := destX. - runLength := text runLengthFor: (lastIndex := lastIndex + 1). - runStopIndex := lastIndex + (runLength - 1) min: line last. - self setStopConditions. - ^ false! Item was removed: - ----- Method: MultiCanvasCharacterScanner>>paddedSpace (in category 'stop conditions') ----- - paddedSpace - "Each space is a stop condition when the alignment is right justified. - Padding must be added to the base width of the space according to - which space in the line this space is and according to the amount of - space that remained at the end of the line when it was composed." - - destX := destX + spaceWidth + (line justifiedPadFor: spaceCount). - - lastIndex := lastIndex + 1. - ^ false! Item was removed: - ----- Method: MultiCanvasCharacterScanner>>setFont (in category 'private') ----- - setFont - foregroundColor ifNil: [foregroundColor := Color black]. - super setFont. - baselineY := lineY + line baseline. - destY := baselineY - font ascent.! Item was removed: - ----- Method: MultiCanvasCharacterScanner>>setStopConditions (in category 'stop conditions') ----- - setStopConditions - "Set the font and the stop conditions for the current run." - - self setFont. - self setConditionArray: (textStyle alignment = Justified ifTrue: [#paddedSpace]). - ! Item was removed: - ----- Method: MultiCanvasCharacterScanner>>tab (in category 'stop conditions') ----- - tab - - destX := (alignment == Justified and: [self leadingTab not]) - ifTrue: "imbedded tabs in justified text are weird" - [destX + (textStyle tabWidth - (line justifiedTabDeltaFor: spaceCount)) max: destX] - ifFalse: - [textStyle nextTabXFrom: destX - leftMargin: leftMargin - rightMargin: rightMargin]. - - lastIndex := lastIndex + 1. - ^ false! Item was removed: - ----- Method: MultiCanvasCharacterScanner>>textColor: (in category 'private') ----- - textColor: color - foregroundColor := color! Item was removed: - MultiCharacterScanner subclass: #MultiCharacterBlockScanner - instanceVariableNames: 'characterPoint characterIndex lastCharacter lastCharacterExtent lastSpaceOrTabExtent nextLeftMargin specialWidth' - classVariableNames: '' - poolDictionaries: '' - category: 'Etoys-Squeakland-Multilingual-Scanning'! Item was removed: - ----- Method: MultiCharacterBlockScanner>>buildCharacterBlockIn: (in category 'private') ----- - buildCharacterBlockIn: para - | lineIndex runLength lineStop done stopCondition | - "handle nullText" - (para numberOfLines = 0 or: [text size = 0]) - ifTrue: [^ CharacterBlock new stringIndex: 1 "like being off end of string" - text: para text - topLeft: (para leftMarginForDisplayForLine: 1 alignment: (alignment ifNil:[textStyle alignment])) - @ para compositionRectangle top - extent: 0 @ textStyle lineGrid]. - "find the line" - lineIndex := para lineIndexOfTop: characterPoint y. - destY := para topAtLineIndex: lineIndex. - line := para lines at: lineIndex. - rightMargin := para rightMarginForDisplay. - - (lineIndex = para numberOfLines and: - [(destY + line lineHeight) < characterPoint y]) - ifTrue: ["if beyond lastLine, force search to last character" - self characterPointSetX: rightMargin] - ifFalse: [characterPoint y < (para compositionRectangle) top - ifTrue: ["force search to first line" - characterPoint := (para compositionRectangle) topLeft]. - characterPoint x > rightMargin - ifTrue: [self characterPointSetX: rightMargin]]. - destX := (leftMargin := para leftMarginForDisplayForLine: lineIndex alignment: (alignment ifNil:[textStyle alignment])). - nextLeftMargin := para leftMarginForDisplayForLine: lineIndex+1 alignment: (alignment ifNil:[textStyle alignment]). - lastIndex := line first. - - self setStopConditions. "also sets font" - runLength := (text runLengthFor: line first). - characterIndex == nil - ifTrue: [lineStop := line last "characterBlockAtPoint"] - ifFalse: [lineStop := characterIndex "characterBlockForIndex"]. - (runStopIndex := lastIndex + (runLength - 1)) > lineStop - ifTrue: [runStopIndex := lineStop]. - lastCharacterExtent := 0 @ line lineHeight. - spaceCount := 0. done := false. - self handleIndentation. - - [done] - whileFalse: - [stopCondition := self scanCharactersFrom: lastIndex to: runStopIndex - in: text string rightX: characterPoint x - stopConditions: stopConditions kern: kern. - - "see setStopConditions for stopping conditions for character block operations." - self lastCharacterExtentSetX: (font widthOf: (text at: lastIndex)). - (self perform: stopCondition) ifTrue: - [characterIndex == nil - ifTrue: ["characterBlockAtPoint" - ^ CharacterBlock new stringIndex: lastIndex text: text - topLeft: characterPoint + (font descentKern @ 0) - extent: lastCharacterExtent] - ifFalse: ["characterBlockForIndex" - ^ CharacterBlock new stringIndex: lastIndex text: text - topLeft: characterPoint + ((font descentKern) - kern @ 0) - extent: lastCharacterExtent]]]! Item was removed: - ----- Method: MultiCharacterBlockScanner>>characterBlockAtPoint:in: (in category 'scanning') ----- - characterBlockAtPoint: aPoint in: aParagraph - "Answer a CharacterBlock for character in aParagraph at point aPoint. It - is assumed that aPoint has been transformed into coordinates appropriate - to the text's destination form rectangle and the composition rectangle." - - self initializeFromParagraph: aParagraph clippedBy: aParagraph clippingRectangle. - characterPoint := aPoint. - ^self buildCharacterBlockIn: aParagraph! Item was removed: - ----- Method: MultiCharacterBlockScanner>>characterBlockAtPoint:index:in: (in category 'scanning') ----- - characterBlockAtPoint: aPoint index: index in: textLine - "This method is the Morphic characterBlock finder. It combines - MVC's characterBlockAtPoint:, -ForIndex:, and buildCharcterBlock:in:" - | runLength lineStop done stopCondition | - line := textLine. - rightMargin := line rightMargin. - lastIndex := line first. - self setStopConditions. "also sets font" - characterIndex := index. " == nil means scanning for point" - characterPoint := aPoint. - (characterPoint isNil or: [characterPoint y > line bottom]) - ifTrue: [characterPoint := line bottomRight]. - (text isEmpty or: [(characterPoint y < line top or: [characterPoint x < line left]) - or: [characterIndex notNil and: [characterIndex < line first]]]) - ifTrue: [^ (CharacterBlock new stringIndex: line first text: text - topLeft: line leftMargin@line top extent: 0 @ textStyle lineGrid) - textLine: line]. - destX := leftMargin := line leftMarginForAlignment: alignment. - destY := line top. - runLength := text runLengthFor: line first. - characterIndex - ifNotNil: [lineStop := characterIndex "scanning for index"] - ifNil: [lineStop := line last "scanning for point"]. - runStopIndex := lastIndex + (runLength - 1) min: lineStop. - lastCharacterExtent := 0 @ line lineHeight. - spaceCount := 0. - - done := false. - [done] whileFalse: - [stopCondition := self scanCharactersFrom: lastIndex to: runStopIndex - in: text string rightX: characterPoint x - stopConditions: stopConditions kern: kern. - "see setStopConditions for stopping conditions for character block operations." - self lastCharacterExtentSetX: (specialWidth - ifNil: [font widthOf: (text at: lastIndex)] - ifNotNil: [specialWidth]). - (self perform: stopCondition) ifTrue: - [characterIndex - ifNil: [ - "Result for characterBlockAtPoint: " - (stopCondition ~~ #cr and: [ lastIndex == line last - and: [ aPoint x > ((characterPoint x) + (lastCharacterExtent x / 2)) ]]) - ifTrue: [ "Correct for right half of last character in line" - ^ (CharacterBlock new stringIndex: lastIndex + 1 - text: text - topLeft: characterPoint + (lastCharacterExtent x @ 0) + (font descentKern @ 0) - extent: 0 @ lastCharacterExtent y) - textLine: line ]. - ^ (CharacterBlock new stringIndex: lastIndex - text: text topLeft: characterPoint + (font descentKern @ 0) - extent: lastCharacterExtent - (font baseKern @ 0)) - textLine: line] - ifNotNil: ["Result for characterBlockForIndex: " - ^ (CharacterBlock new stringIndex: characterIndex - text: text topLeft: characterPoint + ((font descentKern) - kern @ 0) - extent: lastCharacterExtent) - textLine: line]]]! Item was removed: - ----- Method: MultiCharacterBlockScanner>>characterBlockForIndex:in: (in category 'scanning') ----- - characterBlockForIndex: targetIndex in: aParagraph - "Answer a CharacterBlock for character in aParagraph at targetIndex. The - coordinates in the CharacterBlock will be appropriate to the intersection - of the destination form rectangle and the composition rectangle." - - self - initializeFromParagraph: aParagraph - clippedBy: aParagraph clippingRectangle. - characterIndex := targetIndex. - characterPoint := - aParagraph rightMarginForDisplay @ - (aParagraph topAtLineIndex: - (aParagraph lineIndexOfCharacterIndex: characterIndex)). - ^self buildCharacterBlockIn: aParagraph! Item was removed: - ----- Method: MultiCharacterBlockScanner>>characterPointSetX: (in category 'private') ----- - characterPointSetX: xVal - characterPoint := xVal @ characterPoint y! Item was removed: - ----- Method: MultiCharacterBlockScanner>>cr (in category 'stop conditions') ----- - cr - "Answer a CharacterBlock that specifies the current location of the mouse - relative to a carriage return stop condition that has just been - encountered. The ParagraphEditor convention is to denote selections by - CharacterBlocks, sometimes including the carriage return (cursor is at - the end) and sometimes not (cursor is in the middle of the text)." - - ((characterIndex ~= nil - and: [characterIndex > text size]) - or: [(line last = text size) - and: [(destY + line lineHeight) < characterPoint y]]) - ifTrue: ["When off end of string, give data for next character" - destY := destY + line lineHeight. - baselineY := line lineHeight. - lastCharacter := nil. - characterPoint := (nextLeftMargin ifNil: [leftMargin]) @ destY. - lastIndex := lastIndex + 1. - self lastCharacterExtentSetX: 0. - ^ true]. - lastCharacter := CR. - characterPoint := destX @ destY. - self lastCharacterExtentSetX: rightMargin - destX. - ^true! Item was removed: - ----- Method: MultiCharacterBlockScanner>>crossedX (in category 'stop conditions') ----- - crossedX - "Text display has wrapping. The scanner just found a character past the x - location of the cursor. We know that the cursor is pointing at a character - or before one." - - | leadingTab currentX | - characterIndex == nil ifFalse: [ - "If the last character of the last line is a space, - and it crosses the right margin, then locating - the character block after it is impossible without this hack." - characterIndex > text size ifTrue: [ - lastIndex := characterIndex. - characterPoint := (nextLeftMargin ifNil: [leftMargin]) @ (destY + line lineHeight). - ^true]]. - characterPoint x <= (destX + (lastCharacterExtent x // 2)) - ifTrue: [lastCharacter := (text at: lastIndex). - characterPoint := destX @ destY. - ^true]. - lastIndex >= line last - ifTrue: [lastCharacter := (text at: line last). - characterPoint := destX @ destY. - ^true]. - - "Pointing past middle of a character, return the next character." - lastIndex := lastIndex + 1. - lastCharacter := text at: lastIndex. - currentX := destX + lastCharacterExtent x + kern. - self lastCharacterExtentSetX: (font widthOf: lastCharacter). - characterPoint := currentX @ destY. - lastCharacter = Space ifFalse: [^ true]. - - "Yukky if next character is space or tab." - alignment = Justified ifTrue: - [self lastCharacterExtentSetX: - (lastCharacterExtent x + (line justifiedPadFor: (spaceCount + 1))). - ^ true]. - - true ifTrue: [^ true]. - "NOTE: I find no value to the following code, and so have defeated it - DI" - - "See tabForDisplay for illumination on the following awfulness." - leadingTab := true. - line first to: lastIndex - 1 do: - [:index | (text at: index) ~= Tab ifTrue: [leadingTab := false]]. - (alignment ~= Justified or: [leadingTab]) - ifTrue: [self lastCharacterExtentSetX: (textStyle nextTabXFrom: currentX - leftMargin: leftMargin rightMargin: rightMargin) - - currentX] - ifFalse: [self lastCharacterExtentSetX: (((currentX + (textStyle tabWidth - - (line justifiedTabDeltaFor: spaceCount))) - - currentX) max: 0)]. - ^ true! Item was removed: - ----- Method: MultiCharacterBlockScanner>>endOfRun (in category 'stop conditions') ----- - endOfRun - "Before arriving at the cursor location, the selection has encountered an - end of run. Answer false if the selection continues, true otherwise. Set - up indexes for building the appropriate CharacterBlock." - - | runLength lineStop | - (((characterIndex ~~ nil and: - [runStopIndex < characterIndex and: [runStopIndex < text size]]) - or: [characterIndex == nil and: [lastIndex < line last]]) or: [ - ((lastIndex < line last) - and: [((text at: lastIndex) leadingChar ~= (text at: lastIndex+1) leadingChar) - and: [lastIndex ~= characterIndex]])]) - ifTrue: ["We're really at the end of a real run." - runLength := (text runLengthFor: (lastIndex := lastIndex + 1)). - characterIndex ~~ nil - ifTrue: [lineStop := characterIndex "scanning for index"] - ifFalse: [lineStop := line last "scanning for point"]. - (runStopIndex := lastIndex + (runLength - 1)) > lineStop - ifTrue: [runStopIndex := lineStop]. - self setStopConditions. - ^false]. - - lastCharacter := text at: lastIndex. - characterPoint := destX @ destY. - ((lastCharacter = Space and: [alignment = Justified]) - or: [lastCharacter = Tab and: [lastSpaceOrTabExtent notNil]]) - ifTrue: [lastCharacterExtent := lastSpaceOrTabExtent]. - characterIndex ~~ nil - ifTrue: ["If scanning for an index and we've stopped on that index, - then we back destX off by the width of the character stopped on - (it will be pointing at the right side of the character) and return" - runStopIndex = characterIndex - ifTrue: [self characterPointSetX: destX - lastCharacterExtent x. - ^true]. - "Otherwise the requested index was greater than the length of the - string. Return string size + 1 as index, indicate further that off the - string by setting character to nil and the extent to 0." - lastIndex := lastIndex + 1. - lastCharacter := nil. - self lastCharacterExtentSetX: 0. - ^true]. - - "Scanning for a point and either off the end of the line or off the end of the string." - runStopIndex = text size - ifTrue: ["off end of string" - lastIndex := lastIndex + 1. - lastCharacter := nil. - self lastCharacterExtentSetX: 0. - ^true]. - "just off end of line without crossing x" - lastIndex := lastIndex + 1. - ^true! Item was removed: - ----- Method: MultiCharacterBlockScanner>>indentationLevel: (in category 'scanning') ----- - indentationLevel: anInteger - super indentationLevel: anInteger. - nextLeftMargin := leftMargin. - indentationLevel timesRepeat: [ - nextLeftMargin := textStyle nextTabXFrom: nextLeftMargin - leftMargin: leftMargin - rightMargin: rightMargin]! Item was removed: - ----- Method: MultiCharacterBlockScanner>>lastCharacterExtentSetX: (in category 'private') ----- - lastCharacterExtentSetX: xVal - lastCharacterExtent := xVal @ lastCharacterExtent y! Item was removed: - ----- Method: MultiCharacterBlockScanner>>lastSpaceOrTabExtentSetX: (in category 'private') ----- - lastSpaceOrTabExtentSetX: xVal - lastSpaceOrTabExtent := xVal @ lastSpaceOrTabExtent y! Item was removed: - ----- Method: MultiCharacterBlockScanner>>paddedSpace (in category 'stop conditions') ----- - paddedSpace - "When the line is justified, the spaces will not be the same as the font's - space character. A padding of extra space must be considered in trying - to find which character the cursor is pointing at. Answer whether the - scanning has crossed the cursor." - - | pad | - pad := 0. - spaceCount := spaceCount + 1. - pad := line justifiedPadFor: spaceCount. - lastSpaceOrTabExtent := lastCharacterExtent copy. - self lastSpaceOrTabExtentSetX: spaceWidth + pad. - (destX + lastSpaceOrTabExtent x) >= characterPoint x - ifTrue: [lastCharacterExtent := lastSpaceOrTabExtent copy. - ^self crossedX]. - lastIndex := lastIndex + 1. - destX := destX + lastSpaceOrTabExtent x. - ^ false - ! Item was removed: - ----- Method: MultiCharacterBlockScanner>>placeEmbeddedObject: (in category 'scanning') ----- - placeEmbeddedObject: anchoredMorph - "Workaround: The following should really use #textAnchorType" - anchoredMorph relativeTextAnchorPosition ifNotNil:[^true]. - (super placeEmbeddedObject: anchoredMorph) ifFalse: [^ false]. - specialWidth := anchoredMorph width. - ^ true! Item was removed: - ----- Method: MultiCharacterBlockScanner>>scanMultiCharactersCombiningFrom:to:in:rightX:stopConditions:kern: (in category 'scanning') ----- - scanMultiCharactersCombiningFrom: startIndex to: stopIndex in: sourceString rightX: rightX stopConditions: stops kern: kernDelta - - | encoding f nextDestX maxAscii startEncoding char charValue | - lastIndex := startIndex. - lastIndex > stopIndex ifTrue: [lastIndex := stopIndex. ^ stops at: EndOfRun]. - startEncoding := (sourceString at: startIndex) leadingChar. - font ifNil: [font := (TextConstants at: #DefaultMultiStyle) fontArray at: 1]. - ((font isMemberOf: StrikeFontSet) or: [font isKindOf: TTCFontSet]) ifTrue: [ - [f := font fontArray at: startEncoding + 1] - on: Exception do: [:ex | f := font fontArray at: 1]. - f ifNil: [ f := font fontArray at: 1]. - maxAscii := f maxAscii. - spaceWidth := f widthOf: Space. - ] ifFalse: [ - maxAscii := font maxAscii. - ]. - - [lastIndex <= stopIndex] whileTrue: [ - encoding := (sourceString at: lastIndex) leadingChar. - encoding ~= startEncoding ifTrue: [lastIndex := lastIndex - 1. ^ stops at: EndOfRun]. - char := (sourceString at: lastIndex). - charValue := char charCode. - charValue > maxAscii ifTrue: [charValue := maxAscii]. - (encoding = 0 and: [(stopConditions at: charValue + 1) ~~ nil]) ifTrue: [ - ^ stops at: charValue + 1 - ]. - nextDestX := destX + (self widthOf: char inFont: font). - nextDestX > rightX ifTrue: [^ stops at: CrossedX]. - destX := nextDestX + kernDelta. - lastIndex := lastIndex + 1. - ]. - lastIndex := stopIndex. - ^ stops at: EndOfRun! Item was removed: - ----- Method: MultiCharacterBlockScanner>>setFont (in category 'stop conditions') ----- - setFont - specialWidth := nil. - super setFont! Item was removed: - ----- Method: MultiCharacterBlockScanner>>setStopConditions (in category 'stop conditions') ----- - setStopConditions - "Set the font and the stop conditions for the current run." - - self setFont. - self setConditionArray: (alignment = Justified ifTrue: [#paddedSpace]). - ! Item was removed: - ----- Method: MultiCharacterBlockScanner>>tab (in category 'stop conditions') ----- - tab - | currentX | - currentX := (alignment == Justified and: [self leadingTab not]) - ifTrue: "imbedded tabs in justified text are weird" - [destX + (textStyle tabWidth - (line justifiedTabDeltaFor: spaceCount)) max: destX] - ifFalse: - [textStyle - nextTabXFrom: destX - leftMargin: leftMargin - rightMargin: rightMargin]. - lastSpaceOrTabExtent := lastCharacterExtent copy. - self lastSpaceOrTabExtentSetX: (currentX - destX max: 0). - currentX >= characterPoint x - ifTrue: - [lastCharacterExtent := lastSpaceOrTabExtent copy. - ^ self crossedX]. - destX := currentX. - lastIndex := lastIndex + 1. - ^false! Item was removed: - Object subclass: #MultiCharacterScanner - instanceVariableNames: 'destX lastIndex xTable destY stopConditions text textStyle alignment leftMargin rightMargin font line runStopIndex spaceCount spaceWidth emphasisCode kern indentationLevel wantsColumnBreaks presentation presentationLine numOfComposition baselineY firstDestX' - classVariableNames: 'DefaultStopConditions NilCondition PaddedSpaceCondition SpaceCondition' - poolDictionaries: 'TextConstants' - category: 'Etoys-Squeakland-Multilingual-Scanning'! Item was removed: - ----- Method: MultiCharacterScanner class>>initialize (in category 'class initialization') ----- - initialize - " - MultiCharacterScanner initialize - " - | a | - a := Array new: 258. - a at: 1 + 1 put: #embeddedObject. - a at: Tab asciiValue + 1 put: #tab. - a at: CR asciiValue + 1 put: #cr. - a at: EndOfRun put: #endOfRun. - a at: CrossedX put: #crossedX. - NilCondition := a copy. - DefaultStopConditions := a copy. - - PaddedSpaceCondition := a copy. - PaddedSpaceCondition at: Space asciiValue + 1 put: #paddedSpace. - - SpaceCondition := a copy. - SpaceCondition at: Space asciiValue + 1 put: #space. - ! Item was removed: - ----- Method: MultiCharacterScanner>>addCharToPresentation: (in category 'multilingual scanning') ----- - addCharToPresentation: char - - ! Item was removed: - ----- Method: MultiCharacterScanner>>addEmphasis: (in category 'private') ----- - addEmphasis: code - "Set the bold-ital-under-strike emphasis." - emphasisCode := emphasisCode bitOr: code! Item was removed: - ----- Method: MultiCharacterScanner>>addKern: (in category 'private') ----- - addKern: kernDelta - "Set the current kern amount." - kern := kern + kernDelta! Item was removed: - ----- Method: MultiCharacterScanner>>basicScanCharactersFrom:to:in:rightX:stopConditions:kern: (in category 'scanning') ----- - basicScanCharactersFrom: startIndex to: stopIndex in: sourceString rightX: rightX stopConditions: stops kern: kernDelta - "Primitive. This is the inner loop of text display--but see - scanCharactersFrom: to:rightX: which would get the string, - stopConditions and displaying from the instance. March through source - String from startIndex to stopIndex. If any character is flagged with a - non-nil entry in stops, then return the corresponding value. Determine - width of each character from xTable, indexed by map. - If dextX would exceed rightX, then return stops at: 258. - Advance destX by the width of the character. If stopIndex has been - reached, then return stops at: 257. Optional. - See Object documentation whatIsAPrimitive." - | ascii nextDestX char | - <primitive: 103> - lastIndex := startIndex. - [lastIndex <= stopIndex] - whileTrue: - [char := (sourceString at: lastIndex). - ascii := char asciiValue + 1. - (stops at: ascii) == nil ifFalse: [^stops at: ascii]. - "Note: The following is querying the font about the width - since the primitive may have failed due to a non-trivial - mapping of characters to glyphs or a non-existing xTable." - nextDestX := destX + (font widthOf: char). - nextDestX > rightX ifTrue: [^stops at: CrossedX]. - destX := nextDestX + kernDelta. - lastIndex := lastIndex + 1]. - lastIndex := stopIndex. - ^stops at: EndOfRun! Item was removed: - ----- Method: MultiCharacterScanner>>columnBreak (in category 'scanning') ----- - columnBreak - - ^true! Item was removed: - ----- Method: MultiCharacterScanner>>combinableChar:for: (in category 'scanner methods') ----- - combinableChar: char for: prevEntity - - ! Item was removed: - ----- Method: MultiCharacterScanner>>embeddedObject (in category 'scanning') ----- - embeddedObject - | savedIndex | - savedIndex := lastIndex. - text attributesAt: lastIndex do:[:attr| - attr anchoredMorph ifNotNil:[ - "Following may look strange but logic gets reversed. - If the morph fits on this line we're not done (return false for true) - and if the morph won't fit we're done (return true for false)" - (self placeEmbeddedObject: attr anchoredMorph) ifFalse:[^true]]]. - lastIndex := savedIndex + 1. "for multiple(!!) embedded morphs" - ^false! Item was removed: - ----- Method: MultiCharacterScanner>>handleIndentation (in category 'scanning') ----- - handleIndentation - self indentationLevel timesRepeat: [ - self plainTab]! Item was removed: - ----- Method: MultiCharacterScanner>>indentationLevel (in category 'scanning') ----- - indentationLevel - "return the number of tabs that are currently being placed at the beginning of each line" - ^indentationLevel ifNil:[0]! Item was removed: - ----- Method: MultiCharacterScanner>>indentationLevel: (in category 'scanning') ----- - indentationLevel: anInteger - "set the number of tabs to put at the beginning of each line" - indentationLevel := anInteger! Item was removed: - ----- Method: MultiCharacterScanner>>initialize (in category 'initialize') ----- - initialize - destX := destY := leftMargin := 0.! Item was removed: - ----- Method: MultiCharacterScanner>>initializeFromParagraph:clippedBy: (in category 'private') ----- - initializeFromParagraph: aParagraph clippedBy: clippingRectangle - - text := aParagraph text. - textStyle := aParagraph textStyle. - ! Item was removed: - ----- Method: MultiCharacterScanner>>initializeStringMeasurer (in category 'initialize') ----- - initializeStringMeasurer - stopConditions := Array new: 258. - stopConditions at: CrossedX put: #crossedX. - stopConditions at: EndOfRun put: #endOfRun. - ! Item was removed: - ----- Method: MultiCharacterScanner>>isBreakableAt:in:in: (in category 'scanner methods') ----- - isBreakableAt: index in: sourceString in: encodingClass - - ^ encodingClass isBreakableAt: index in: sourceString. - ! Item was removed: - ----- Method: MultiCharacterScanner>>leadingTab (in category 'scanning') ----- - leadingTab - "return true if only tabs lie to the left" - line first to: lastIndex do: - [:i | (text at: i) == Tab ifFalse: [^ false]]. - ^ true! Item was removed: - ----- Method: MultiCharacterScanner>>measureString:inFont:from:to: (in category 'scanning') ----- - measureString: aString inFont: aFont from: startIndex to: stopIndex - "WARNING: In order to use this method the receiver has to be set up using #initializeStringMeasurer" - destX := destY := lastIndex := 0. - baselineY := aFont ascent. - xTable := aFont xTable. - font := aFont. " added Dec 03, 2004 " - " map := aFont characterToGlyphMap." - self scanCharactersFrom: startIndex to: stopIndex in: aString rightX: 999999 stopConditions: stopConditions kern: 0. - ^destX! Item was removed: - ----- Method: MultiCharacterScanner>>placeEmbeddedObject: (in category 'scanning') ----- - placeEmbeddedObject: anchoredMorph - "Place the anchoredMorph or return false if it cannot be placed. - In any event, advance destX by its width." - | w | - "Workaround: The following should really use #textAnchorType" - anchoredMorph relativeTextAnchorPosition ifNotNil:[^true]. - destX := destX + (w := anchoredMorph width). - (destX > rightMargin and: [(leftMargin + w) <= rightMargin]) - ifTrue: ["Won't fit, but would on next line" - ^ false]. - lastIndex := lastIndex + 1. - self setFont. "Force recalculation of emphasis for next run" - ^ true! Item was removed: - ----- Method: MultiCharacterScanner>>plainTab (in category 'scanning') ----- - plainTab - "This is the basic method of adjusting destX for a tab." - destX := (alignment == Justified and: [self leadingTab not]) - ifTrue: "embedded tabs in justified text are weird" - [destX + (textStyle tabWidth - (line justifiedTabDeltaFor: spaceCount)) max: destX] - ifFalse: - [textStyle nextTabXFrom: destX - leftMargin: leftMargin - rightMargin: rightMargin]! Item was removed: - ----- Method: MultiCharacterScanner>>registerBreakableIndex (in category 'multilingual scanning') ----- - registerBreakableIndex - - "Record left x and character index of the line-wrappable point. - The default implementation here does nothing." - - ^ false. - ! Item was removed: - ----- Method: MultiCharacterScanner>>removeLastCharFromPresentation (in category 'multilingual scanning') ----- - removeLastCharFromPresentation - ! Item was removed: - ----- Method: MultiCharacterScanner>>scanCharactersFrom:to:in:rightX:stopConditions:kern: (in category 'scanning') ----- - scanCharactersFrom: startIndex to: stopIndex in: sourceString rightX: rightX stopConditions: stops kern: kernDelta - - | startEncoding selector | - (sourceString isByteString) ifTrue: [^ self basicScanCharactersFrom: startIndex to: stopIndex in: sourceString rightX: rightX stopConditions: stops kern: kernDelta.]. - - (sourceString isWideString) ifTrue: [ - startIndex > stopIndex ifTrue: [lastIndex := stopIndex. ^ stops at: EndOfRun]. - startEncoding := (sourceString at: startIndex) leadingChar. - selector := EncodedCharSet scanSelectorAt: startEncoding. - ^ self perform: selector withArguments: (Array with: startIndex with: stopIndex with: sourceString with: rightX with: stopConditions with: kernDelta). - ]. - - ^ stops at: EndOfRun - ! Item was removed: - ----- Method: MultiCharacterScanner>>scanJapaneseCharactersFrom:to:in:rightX:stopConditions:kern: (in category 'scanner methods') ----- - scanJapaneseCharactersFrom: startIndex to: stopIndex in: sourceString rightX: rightX stopConditions: stops kern: kernDelta - - | ascii encoding f nextDestX maxAscii startEncoding | - lastIndex := startIndex. - lastIndex > stopIndex ifTrue: [lastIndex := stopIndex. ^ stops at: EndOfRun]. - startEncoding := (sourceString at: startIndex) leadingChar. - font ifNil: [font := (TextConstants at: #DefaultMultiStyle) fontArray at: 1]. - ((font isMemberOf: StrikeFontSet) or: [font isKindOf: TTCFontSet]) ifTrue: [ - [f := font fontArray at: startEncoding + 1] - on: Exception do: [:ex | f := font fontArray at: 1]. - f ifNil: [ f := font fontArray at: 1]. - maxAscii := f maxAscii. - "xTable := f xTable. - maxAscii := xTable size - 2." - spaceWidth := f widthOf: Space. - ] ifFalse: [ - (font isMemberOf: HostFont) ifTrue: [ - f := font. - maxAscii := f maxAscii. - spaceWidth := f widthOf: Space. - ] ifFalse: [ - maxAscii := font maxAscii. - ]. - ]. - [lastIndex <= stopIndex] whileTrue: [ - "self halt." - encoding := (sourceString at: lastIndex) leadingChar. - encoding ~= startEncoding ifTrue: [lastIndex := lastIndex - 1. ^ stops at: EndOfRun]. - ascii := (sourceString at: lastIndex) charCode. - ascii > maxAscii ifTrue: [ascii := maxAscii]. - (encoding = 0 and: [(stopConditions at: ascii + 1) ~~ nil]) ifTrue: [^ stops at: ascii + 1]. - (self isBreakableAt: lastIndex in: sourceString in: (EncodedCharSet charsetAt: encoding)) ifTrue: [ - self registerBreakableIndex. - ]. - nextDestX := destX + (font widthOf: (sourceString at: lastIndex)). - nextDestX > rightX ifTrue: [firstDestX ~= destX ifTrue: [^ stops at: CrossedX]]. - destX := nextDestX + kernDelta. - lastIndex := lastIndex + 1. - ]. - lastIndex := stopIndex. - ^ stops at: EndOfRun! Item was removed: - ----- Method: MultiCharacterScanner>>scanMultiCharactersCombiningFrom:to:in:rightX:stopConditions:kern: (in category 'scanner methods') ----- - scanMultiCharactersCombiningFrom: startIndex to: stopIndex in: sourceString rightX: rightX stopConditions: stops kern: kernDelta - - | charCode encoding f maxAscii startEncoding combining combined combiningIndex c | - lastIndex := startIndex. - lastIndex > stopIndex ifTrue: [lastIndex := stopIndex. ^ stops at: EndOfRun]. - startEncoding := (sourceString at: startIndex) leadingChar. - font ifNil: [font := (TextConstants at: #DefaultMultiStyle) fontArray at: 1]. - ((font isMemberOf: StrikeFontSet) or: [font isKindOf: TTCFontSet]) ifTrue: [ - [f := font fontArray at: startEncoding + 1] - on: Exception do: [:ex | f := font fontArray at: 1]. - f ifNil: [ f := font fontArray at: 1]. - maxAscii := f maxAscii. - spaceWidth := font widthOf: Space. - ] ifFalse: [ - maxAscii := font maxAscii. - spaceWidth := font widthOf: Space. - ]. - - combining := nil. - [lastIndex <= stopIndex] whileTrue: [ - charCode := (sourceString at: lastIndex) charCode. - c := (sourceString at: lastIndex). - combining ifNil: [ - combining := CombinedChar new. - combining add: c. - combiningIndex := lastIndex. - lastIndex := lastIndex + 1. - ] ifNotNil: [ - (combining add: c) ifFalse: [ - self addCharToPresentation: (combined := combining combined). - combining := CombinedChar new. - combining add: c. - charCode := combined charCode. - encoding := combined leadingChar. - encoding ~= startEncoding ifTrue: [lastIndex := lastIndex - 1. - (encoding = 0 and: [(stopConditions at: charCode + 1) ~~ nil]) ifTrue: [ - ^ stops at: charCode + 1 - ] ifFalse: [ - ^ stops at: EndOfRun - ]. - ]. - charCode > maxAscii ifTrue: [charCode := maxAscii]. - "" - (encoding = 0 and: [(stopConditions at: charCode + 1) ~~ nil]) ifTrue: [ - combining ifNotNil: [ - self addCharToPresentation: (combining combined). - ]. - ^ stops at: charCode + 1 - ]. - (self isBreakableAt: lastIndex in: sourceString in: Latin1Environment) ifTrue: [ - self registerBreakableIndex. - ]. - destX > rightX ifTrue: [ - destX ~= firstDestX ifTrue: [ - lastIndex := combiningIndex. - self removeLastCharFromPresentation. - ^ stops at: CrossedX]]. - combiningIndex := lastIndex. - lastIndex := lastIndex + 1. - ] ifTrue: [ - lastIndex := lastIndex + 1. - numOfComposition := numOfComposition + 1. - ]. - ]. - ]. - lastIndex := stopIndex. - combining ifNotNil: [ - combined := combining combined. - self addCharToPresentation: combined. - "assuming that there is always enough space for at least one character". - destX := destX + (self widthOf: combined inFont: font). - ]. - ^ stops at: EndOfRun! Item was removed: - ----- Method: MultiCharacterScanner>>scanMultiCharactersFrom:to:in:rightX:stopConditions:kern: (in category 'scanning') ----- - scanMultiCharactersFrom: startIndex to: stopIndex in: sourceString rightX: rightX stopConditions: stops kern: kernDelta - - | ascii encoding f nextDestX maxAscii startEncoding | - lastIndex := startIndex. - lastIndex > stopIndex ifTrue: [lastIndex := stopIndex. ^ stops at: EndOfRun]. - startEncoding := (sourceString at: startIndex) leadingChar. - font ifNil: [font := (TextConstants at: #DefaultMultiStyle) fontArray at: 1]. - ((font isMemberOf: StrikeFontSet) or: [font isKindOf: TTCFontSet]) ifTrue: [ - [f := font fontArray at: startEncoding + 1] - on: Exception do: [:ex | f := font fontArray at: 1]. - f ifNil: [ f := font fontArray at: 1]. - maxAscii := f maxAscii. - spaceWidth := f widthOf: Space. - ] ifFalse: [ - maxAscii := font maxAscii. - ]. - - [lastIndex <= stopIndex] whileTrue: [ - encoding := (sourceString at: lastIndex) leadingChar. - encoding ~= startEncoding ifTrue: [lastIndex := lastIndex - 1. ^ stops at: EndOfRun]. - ascii := (sourceString at: lastIndex) charCode. - ascii > maxAscii ifTrue: [ascii := maxAscii]. - (encoding = 0 and: [ascii < stopConditions size and: [(stopConditions at: ascii + 1) ~~ nil]]) ifTrue: [^ stops at: ascii + 1]. - (self isBreakableAt: lastIndex in: sourceString in: Latin1Environment) ifTrue: [ - self registerBreakableIndex. - ]. - nextDestX := destX + (font widthOf: (sourceString at: lastIndex)). - nextDestX > rightX ifTrue: [destX ~= firstDestX ifTrue: [^ stops at: CrossedX]]. - destX := nextDestX + kernDelta. - lastIndex := lastIndex + 1. - ]. - lastIndex := stopIndex. - ^ stops at: EndOfRun! Item was removed: - ----- Method: MultiCharacterScanner>>scanMultiCharactersR2LFrom:to:in:rightX:stopConditions:kern: (in category 'scanner methods') ----- - scanMultiCharactersR2LFrom: startIndex to: stopIndex in: sourceString rightX: rightX stopConditions: stops kern: kernDelta - - "Note that 'rightX' really means 'endX' in R2L context. Ie. rightX is usually smaller than destX." - | ascii encoding f nextDestX maxAscii startEncoding | - lastIndex := startIndex. - lastIndex > stopIndex ifTrue: [lastIndex := stopIndex. ^ stops at: EndOfRun]. - startEncoding := (sourceString at: startIndex) leadingChar. - font ifNil: [font := (TextConstants at: #DefaultMultiStyle) fontArray at: 1]. - ((font isMemberOf: StrikeFontSet) or: [font isKindOf: TTCFontSet]) ifTrue: [ - [f := font fontArray at: startEncoding + 1] - on: Exception do: [:ex | f := font fontArray at: 1]. - f ifNil: [ f := font fontArray at: 1]. - maxAscii := f maxAscii. - spaceWidth := f widthOf: Space. - ] ifFalse: [ - maxAscii := font maxAscii. - ]. - - [lastIndex <= stopIndex] whileTrue: [ - encoding := (sourceString at: lastIndex) leadingChar. - encoding ~= startEncoding ifTrue: [lastIndex := lastIndex - 1. ^ stops at: EndOfRun]. - ascii := (sourceString at: lastIndex) charCode. - ascii > maxAscii ifTrue: [ascii := maxAscii]. - (encoding = 0 and: [(stopConditions at: ascii + 1) ~~ nil]) ifTrue: [^ stops at: ascii + 1]. - (self isBreakableAt: lastIndex in: sourceString in: Latin1Environment) ifTrue: [ - self registerBreakableIndex. - ]. - nextDestX := destX - (font widthOf: (sourceString at: lastIndex)). - nextDestX < rightX ifTrue: [^ stops at: CrossedX]. - destX := nextDestX - kernDelta. - lastIndex := lastIndex + 1. - ]. - lastIndex := stopIndex. - ^ stops at: EndOfRun! Item was removed: - ----- Method: MultiCharacterScanner>>scanSimChineseCharactersFrom:to:in:rightX:stopConditions:kern: (in category 'scanner methods') ----- - scanSimChineseCharactersFrom: startIndex to: stopIndex in: sourceString rightX: rightX stopConditions: stops kern: kernDelta - - | ascii encoding f nextDestX maxAscii startEncoding | - lastIndex := startIndex. - lastIndex > stopIndex ifTrue: [lastIndex := stopIndex. ^ stops at: EndOfRun]. - startEncoding := (sourceString at: startIndex) leadingChar. - font ifNil: [font := (TextConstants at: #DefaultMultiStyle) fontArray at: 1]. - ((font isMemberOf: StrikeFontSet) or: [font isKindOf: TTCFontSet]) ifTrue: [ - [f := font fontArray at: startEncoding + 1] - on: Exception do: [:ex | f := font fontArray at: 1]. - f ifNil: [ f := font fontArray at: 1]. - maxAscii := f maxAscii. - "xTable := f xTable. - maxAscii := xTable size - 2." - spaceWidth := f widthOf: Space. - ] ifFalse: [ - (font isMemberOf: HostFont) ifTrue: [ - f := font. - maxAscii := f maxAscii. - spaceWidth := f widthOf: Space. - ] ifFalse: [ - maxAscii := font maxAscii. - ]. - ]. - [lastIndex <= stopIndex] whileTrue: [ - "self halt." - encoding := (sourceString at: lastIndex) leadingChar. - encoding ~= startEncoding ifTrue: [lastIndex := lastIndex - 1. ^ stops at: EndOfRun]. - ascii := (sourceString at: lastIndex) charCode. - ascii > maxAscii ifTrue: [ascii := maxAscii]. - (encoding = 0 and: [(stopConditions at: ascii + 1) ~~ nil]) ifTrue: [^ stops at: ascii + 1]. - (self isBreakableAt: lastIndex in: sourceString in: (EncodedCharSet charsetAt: encoding)) ifTrue: [ - self registerBreakableIndex. - ]. - nextDestX := destX + (font widthOf: (sourceString at: lastIndex)). - nextDestX > rightX ifTrue: [firstDestX ~= destX ifTrue: [^ stops at: CrossedX]]. - destX := nextDestX + kernDelta. - lastIndex := lastIndex + 1. - ]. - lastIndex := stopIndex. - ^ stops at: EndOfRun! Item was removed: - ----- Method: MultiCharacterScanner>>setActualFont: (in category 'private') ----- - setActualFont: aFont - "Set the basal font to an isolated font reference." - - font := aFont! Item was removed: - ----- Method: MultiCharacterScanner>>setAlignment: (in category 'private') ----- - setAlignment: style - alignment := style. - ! Item was removed: - ----- Method: MultiCharacterScanner>>setConditionArray: (in category 'private') ----- - setConditionArray: aSymbol - - aSymbol == #paddedSpace ifTrue: [^stopConditions := PaddedSpaceCondition "copy"]. - "aSymbol == #space ifTrue: [^stopConditions := SpaceCondition copy]." - aSymbol == nil ifTrue: [^stopConditions := NilCondition "copy"]. - self error: 'undefined stopcondition for space character'. - ! Item was removed: - ----- Method: MultiCharacterScanner>>setFont (in category 'private') ----- - setFont - | priorFont | - "Set the font and other emphasis." - priorFont := font. - text == nil ifFalse:[ - emphasisCode := 0. - kern := 0. - indentationLevel := 0. - alignment := textStyle alignment. - font := nil. - (text attributesAt: lastIndex forStyle: textStyle) - do: [:att | att emphasizeScanner: self]]. - font == nil ifTrue: - [self setFont: textStyle defaultFontIndex]. - font := font emphasized: emphasisCode. - priorFont ifNotNil: [destX := destX + priorFont descentKern]. - destX := destX - font descentKern. - "NOTE: next statement should be removed when clipping works" - leftMargin ifNotNil: [destX := destX max: leftMargin]. - kern := kern - font baseKern. - - "Install various parameters from the font." - spaceWidth := font widthOf: Space. - xTable := font xTable. - " map := font characterToGlyphMap." - stopConditions := DefaultStopConditions.! Item was removed: - ----- Method: MultiCharacterScanner>>setFont: (in category 'private') ----- - setFont: fontNumber - "Set the font by number from the textStyle." - - self setActualFont: (textStyle fontAt: fontNumber)! Item was removed: - ----- Method: MultiCharacterScanner>>text:textStyle: (in category 'private') ----- - text: t textStyle: ts - text := t. - textStyle := ts! Item was removed: - ----- Method: MultiCharacterScanner>>textColor: (in category 'private') ----- - textColor: ignored - "Overridden in DisplayScanner"! Item was removed: - ----- Method: MultiCharacterScanner>>wantsColumnBreaks: (in category 'initialize') ----- - wantsColumnBreaks: aBoolean - - wantsColumnBreaks := aBoolean! Item was removed: - ----- Method: MultiCharacterScanner>>widthOf:inFont: (in category 'multilingual scanning') ----- - widthOf: char inFont: aFont - - (char isMemberOf: CombinedChar) ifTrue: [ - ^ aFont widthOf: char base. - ] ifFalse: [ - ^ aFont widthOf: char. - ]. - - - ! Item was removed: - MultiCharacterScanner subclass: #MultiCompositionScanner - instanceVariableNames: 'spaceX lineHeight baseline breakableIndex lineHeightAtBreak baselineAtBreak breakAtSpace lastWidth' - classVariableNames: '' - poolDictionaries: '' - category: 'Etoys-Squeakland-Multilingual-Scanning'! Item was removed: - ----- Method: MultiCompositionScanner>>addCharToPresentation: (in category 'multilingual scanning') ----- - addCharToPresentation: char - - presentation nextPut: char. - lastWidth := self widthOf: char inFont: font. - destX := destX + lastWidth. - ! Item was removed: - ----- Method: MultiCompositionScanner>>columnBreak (in category 'stop conditions') ----- - columnBreak - - "Answer true. Set up values for the text line interval currently being - composed." - - line stop: lastIndex. - presentationLine stop: lastIndex - numOfComposition. - spaceX := destX. - line paddingWidth: rightMargin - spaceX. - presentationLine paddingWidth: rightMargin - spaceX. - ^true! Item was removed: - ----- Method: MultiCompositionScanner>>composeFrom:inRectangle:firstLine:leftSide:rightSide: (in category 'scanning') ----- - composeFrom: startIndex inRectangle: lineRectangle - firstLine: firstLine leftSide: leftSide rightSide: rightSide - "Answer an instance of TextLineInterval that represents the next line in the paragraph." - | runLength done stopCondition | - "Set up margins" - leftMargin := lineRectangle left. - leftSide ifTrue: [leftMargin := leftMargin + - (firstLine ifTrue: [textStyle firstIndent] - ifFalse: [textStyle restIndent])]. - destX := spaceX := leftMargin. - firstDestX := destX. - rightMargin := lineRectangle right. - rightSide ifTrue: [rightMargin := rightMargin - textStyle rightIndent]. - lastIndex := startIndex. "scanning sets last index" - destY := lineRectangle top. - lineHeight := baseline := 0. "Will be increased by setFont" - self setStopConditions. "also sets font" - runLength := text runLengthFor: startIndex. - runStopIndex := (lastIndex := startIndex) + (runLength - 1). - line := (TextLine start: lastIndex stop: 0 internalSpaces: 0 paddingWidth: 0) - rectangle: lineRectangle. - presentationLine := (TextLine start: lastIndex stop: 0 internalSpaces: 0 paddingWidth: 0) - rectangle: lineRectangle. - numOfComposition := 0. - spaceCount := 0. - self handleIndentation. - leftMargin := destX. - line leftMargin: leftMargin. - presentationLine leftMargin: leftMargin. - - presentation := TextStream on: (Text fromString: (WideString new: text size)). - - done := false. - [done] - whileFalse: - [stopCondition := self scanCharactersFrom: lastIndex to: runStopIndex - in: text string rightX: rightMargin stopConditions: stopConditions - kern: kern. - "See setStopConditions for stopping conditions for composing." - (self perform: stopCondition) - ifTrue: [presentationLine lineHeight: lineHeight + textStyle leading - baseline: baseline + textStyle leading. - ^ line lineHeight: lineHeight + textStyle leading - baseline: baseline + textStyle leading]]! Item was removed: - ----- Method: MultiCompositionScanner>>composeLine:fromCharacterIndex:inParagraph: (in category 'scanning') ----- - composeLine: lineIndex fromCharacterIndex: startIndex inParagraph: aParagraph - "Answer an instance of TextLineInterval that represents the next line in the paragraph." - | runLength done stopCondition | - destX := spaceX := leftMargin := aParagraph leftMarginForCompositionForLine: lineIndex. - destY := 0. - rightMargin := aParagraph rightMarginForComposition. - leftMargin >= rightMargin ifTrue: [self error: 'No room between margins to compose']. - lastIndex := startIndex. "scanning sets last index" - lineHeight := textStyle lineGrid. "may be increased by setFont:..." - baseline := textStyle baseline. - baselineY := destY + baseline. - self setStopConditions. "also sets font" - self handleIndentation. - runLength := text runLengthFor: startIndex. - runStopIndex := (lastIndex := startIndex) + (runLength - 1). - line := TextLineInterval - start: lastIndex - stop: 0 - internalSpaces: 0 - paddingWidth: 0. - presentationLine := TextLineInterval - start: lastIndex - stop: 0 - internalSpaces: 0 - paddingWidth: 0. - numOfComposition := 0. - presentation := TextStream on: (Text fromString: (WideString new: text size)). - spaceCount := 0. - done := false. - [done] - whileFalse: - [stopCondition := self scanCharactersFrom: lastIndex to: runStopIndex - in: text string rightX: rightMargin stopConditions: stopConditions - kern: kern. - "See setStopConditions for stopping conditions for composing." - (self perform: stopCondition) - ifTrue: [presentationLine lineHeight: lineHeight + textStyle leading - baseline: baseline + textStyle leading. - ^line lineHeight: lineHeight + textStyle leading - baseline: baseline + textStyle leading]]! Item was removed: - ----- Method: MultiCompositionScanner>>cr (in category 'stop conditions') ----- - cr - "Answer true. Set up values for the text line interval currently being - composed." - - line stop: lastIndex. - presentationLine stop: lastIndex - numOfComposition. - spaceX := destX. - line paddingWidth: rightMargin - spaceX. - presentationLine paddingWidth: rightMargin - spaceX. - ^true! Item was removed: - ----- Method: MultiCompositionScanner>>crossedX (in category 'stop conditions') ----- - crossedX - "There is a word that has fallen across the right edge of the composition - rectangle. This signals the need for wrapping which is done to the last - space that was encountered, as recorded by the space stop condition." - - (breakAtSpace) ifTrue: [ - spaceCount >= 1 ifTrue: - ["The common case. First back off to the space at which we wrap." - line stop: breakableIndex. - presentationLine stop: breakableIndex - numOfComposition. - lineHeight := lineHeightAtBreak. - baseline := baselineAtBreak. - spaceCount := spaceCount - 1. - breakableIndex := breakableIndex - 1. - - "Check to see if any spaces preceding the one at which we wrap. - Double space after punctuation, most likely." - [(spaceCount > 1 and: [(text at: breakableIndex) = Space])] - whileTrue: - [spaceCount := spaceCount - 1. - "Account for backing over a run which might - change width of space." - font := text fontAt: breakableIndex withStyle: textStyle. - breakableIndex := breakableIndex - 1. - spaceX := spaceX - (font widthOf: Space)]. - line paddingWidth: rightMargin - spaceX. - presentationLine paddingWidth: rightMargin - spaceX. - presentationLine internalSpaces: spaceCount. - line internalSpaces: spaceCount] - ifFalse: - ["Neither internal nor trailing spaces -- almost never happens." - lastIndex := lastIndex - 1. - [destX <= rightMargin] - whileFalse: - [destX := destX - (font widthOf: (text at: lastIndex)). - lastIndex := lastIndex - 1]. - spaceX := destX. - line paddingWidth: rightMargin - destX. - presentationLine paddingWidth: rightMargin - destX. - presentationLine stop: (lastIndex max: line first). - line stop: (lastIndex max: line first)]. - ^true - ]. - - (breakableIndex isNil or: [breakableIndex < line first]) ifTrue: [ - "Any breakable point in this line. Just wrap last character." - breakableIndex := lastIndex - 1. - lineHeightAtBreak := lineHeight. - baselineAtBreak := baseline. - ]. - - "It wasn't a space, but anyway this is where we break the line." - line stop: breakableIndex. - presentationLine stop: breakableIndex. - lineHeight := lineHeightAtBreak. - baseline := baselineAtBreak. - ^ true. - ! Item was removed: - ----- Method: MultiCompositionScanner>>endOfRun (in category 'stop conditions') ----- - endOfRun - "Answer true if scanning has reached the end of the paragraph. - Otherwise step conditions (mostly install potential new font) and answer - false." - - | runLength | - lastIndex = text size - ifTrue: [line stop: lastIndex. - presentationLine stop: lastIndex - numOfComposition. - spaceX := destX. - line paddingWidth: rightMargin - destX. - presentationLine paddingWidth: rightMargin - destX. - ^true] - ifFalse: [ - "(text at: lastIndex) charCode = 32 ifTrue: [destX := destX + spaceWidth]." - runLength := (text runLengthFor: (lastIndex := lastIndex + 1)). - runStopIndex := lastIndex + (runLength - 1). - self setStopConditions. - ^false] - ! Item was removed: - ----- Method: MultiCompositionScanner>>forParagraph: (in category 'intialize-release') ----- - forParagraph: aParagraph - "Initialize the receiver for scanning the given paragraph." - - self - initializeFromParagraph: aParagraph - clippedBy: aParagraph clippingRectangle. - ! Item was removed: - ----- Method: MultiCompositionScanner>>getPresentation (in category 'multilingual scanning') ----- - getPresentation - - ^ presentation contents. - - ! Item was removed: - ----- Method: MultiCompositionScanner>>getPresentationLine (in category 'multilingual scanning') ----- - getPresentationLine - - ^ presentationLine. - ! Item was removed: - ----- Method: MultiCompositionScanner>>isBreakableAt:in:in: (in category 'multilingual scanning') ----- - isBreakableAt: index in: sourceString in: encodingClass - - ^ encodingClass isBreakableAt: index in: sourceString. - ! Item was removed: - ----- Method: MultiCompositionScanner>>placeEmbeddedObject: (in category 'stop conditions') ----- - placeEmbeddedObject: anchoredMorph - | descent | - "Workaround: The following should really use #textAnchorType" - anchoredMorph relativeTextAnchorPosition ifNotNil:[^true]. - (super placeEmbeddedObject: anchoredMorph) ifFalse: ["It doesn't fit" - "But if it's the first character then leave it here" - lastIndex < line first ifFalse:[ - line stop: lastIndex-1. - ^ false]]. - descent := lineHeight - baseline. - lineHeight := lineHeight max: anchoredMorph height. - baseline := lineHeight - descent. - line stop: lastIndex. - presentationLine stop: lastIndex - numOfComposition. - ^ true! Item was removed: - ----- Method: MultiCompositionScanner>>presentation (in category 'accessing') ----- - presentation - - ^ presentation. - ! Item was removed: - ----- Method: MultiCompositionScanner>>presentationLine (in category 'accessing') ----- - presentationLine - - ^ presentationLine. - ! Item was removed: - ----- Method: MultiCompositionScanner>>registerBreakableIndex (in category 'multilingual scanning') ----- - registerBreakableIndex - - "Record left x and character index of the line-wrappable point. - Used for wrap-around. Answer whether the character has crossed the - right edge of the composition rectangle of the paragraph." - - (text at: lastIndex) = Character space ifTrue: [ - breakAtSpace := true. - spaceX := destX. - spaceCount := spaceCount + 1. - lineHeightAtBreak := lineHeight. - baselineAtBreak := baseline. - breakableIndex := lastIndex. - destX > rightMargin ifTrue: [^self crossedX]. - ] ifFalse: [ - breakAtSpace := false. - lineHeightAtBreak := lineHeight. - baselineAtBreak := baseline. - breakableIndex := lastIndex - 1. - ]. - ^ false. - ! Item was removed: - ----- Method: MultiCompositionScanner>>removeLastCharFromPresentation (in category 'multilingual scanning') ----- - removeLastCharFromPresentation - - presentation ifNotNil: [ - presentation position: presentation position - 1. - ]. - destX := destX - lastWidth. - ! Item was removed: - ----- Method: MultiCompositionScanner>>rightX (in category 'accessing') ----- - rightX - "Meaningful only when a line has just been composed -- refers to the - line most recently composed. This is a subtrefuge to allow for easy - resizing of a composition rectangle to the width of the maximum line. - Useful only when there is only one line in the form or when each line - is terminated by a carriage return. Handy for sizing menus and lists." - - breakAtSpace ifTrue: [^ spaceX]. - - ^ destX. - ! Item was removed: - ----- Method: MultiCompositionScanner>>setActualFont: (in category 'scanning') ----- - setActualFont: aFont - "Keep track of max height and ascent for auto lineheight" - | descent | - super setActualFont: aFont. - "' ', lastIndex printString, ' ' displayAt: (lastIndex * 15)@0." - lineHeight == nil - ifTrue: [descent := font descent. - baseline := font ascent. - lineHeight := baseline + descent] - ifFalse: [descent := lineHeight - baseline max: font descent. - baseline := baseline max: font ascent. - lineHeight := lineHeight max: baseline + descent]! Item was removed: - ----- Method: MultiCompositionScanner>>setFont (in category 'stop conditions') ----- - setFont - super setFont. - breakAtSpace := false. - wantsColumnBreaks == true ifTrue: [ - stopConditions := stopConditions copy. - stopConditions at: TextComposer characterForColumnBreak asciiValue + 1 put: #columnBreak. - ]. - ! Item was removed: - ----- Method: MultiCompositionScanner>>setStopConditions (in category 'stop conditions') ----- - setStopConditions - "Set the font and the stop conditions for the current run." - - self setFont! Item was removed: - ----- Method: MultiCompositionScanner>>tab (in category 'stop conditions') ----- - tab - "Advance destination x according to tab settings in the paragraph's - textStyle. Answer whether the character has crossed the right edge of - the composition rectangle of the paragraph." - - destX := textStyle - nextTabXFrom: destX leftMargin: leftMargin rightMargin: rightMargin. - destX > rightMargin ifTrue: [^self crossedX]. - lastIndex := lastIndex + 1. - ^false - ! Item was removed: - MultiCharacterScanner subclass: #MultiDisplayScanner - instanceVariableNames: 'bitBlt lineY runX foregroundColor backgroundColor fillBlt lineHeight paragraph paragraphColor morphicOffset ignoreColorChanges' - classVariableNames: '' - poolDictionaries: '' - category: 'Etoys-Squeakland-Multilingual-Scanning'! Item was removed: - ----- Method: MultiDisplayScanner class>>defaultFont (in category 'queries') ----- - defaultFont - ^ TextStyle defaultFont! Item was removed: - ----- Method: MultiDisplayScanner>>cr (in category 'stop conditions') ----- - cr - "When a carriage return is encountered, simply increment the pointer - into the paragraph." - - lastIndex := lastIndex + 1. - ^false! Item was removed: - ----- Method: MultiDisplayScanner>>crossedX (in category 'stop conditions') ----- - crossedX - "This condition will sometimes be reached 'legally' during display, when, - for instance the space that caused the line to wrap actually extends over - the right boundary. This character is allowed to display, even though it - is technically outside or straddling the clipping ectangle since it is in - the normal case not visible and is in any case appropriately clipped by - the scanner." - - ^ true ! Item was removed: - ----- Method: MultiDisplayScanner>>displayLine:offset:leftInRun: (in category 'scanning') ----- - displayLine: textLine offset: offset leftInRun: leftInRun - "The call on the primitive (scanCharactersFrom:to:in:rightX:) will be interrupted according to an array of stop conditions passed to the scanner at which time the code to handle the stop condition is run and the call on the primitive continued until a stop condition returns true (which means the line has terminated). leftInRun is the # of characters left to scan in the current run; when 0, it is time to call setStopConditions." - | done stopCondition nowLeftInRun startIndex string lastPos | - line := textLine. - morphicOffset := offset. - lineY := line top + offset y. - lineHeight := line lineHeight. - rightMargin := line rightMargin + offset x. - lastIndex := line first. - leftInRun <= 0 ifTrue: [self setStopConditions]. - leftMargin := (line leftMarginForAlignment: alignment) + offset x. - destX := runX := leftMargin. - fillBlt == nil ifFalse: - ["Not right" - fillBlt destX: line left destY: lineY - width: line width left height: lineHeight; copyBits]. - lastIndex := line first. - leftInRun <= 0 - ifTrue: [nowLeftInRun := text runLengthFor: lastIndex] - ifFalse: [nowLeftInRun := leftInRun]. - baselineY := lineY + line baseline. - destY := baselineY - font ascent. - runStopIndex := lastIndex + (nowLeftInRun - 1) min: line last. - spaceCount := 0. - done := false. - string := text string. - [done] whileFalse:[ - startIndex := lastIndex. - lastPos := destX@destY. - stopCondition := self scanCharactersFrom: lastIndex to: runStopIndex - in: string rightX: rightMargin stopConditions: stopConditions - kern: kern. - lastIndex >= startIndex ifTrue:[ - font displayString: string on: bitBlt - from: startIndex - "XXXX: The following is an interesting bug. All stopConditions exept #endOfRun - have lastIndex past the last character displayed. #endOfRun sets it *on* the character. - If we display up until lastIndex then we will also display invisible characters like - CR and tab. This problem should be fixed in the scanner (i.e., position lastIndex - consistently) but I don't want to deal with the fallout right now so we keep the - fix minimally invasive." - to: (stopCondition == #endOfRun ifTrue:[lastIndex] ifFalse:[lastIndex-1]) - at: lastPos kern: kern baselineY: baselineY]. - "see setStopConditions for stopping conditions for displaying." - done := self perform: stopCondition. - "lastIndex > runStopIndex ifTrue: [done := true]." - ]. - ^ runStopIndex - lastIndex "Number of characters remaining in the current run"! Item was removed: - ----- Method: MultiDisplayScanner>>displayLines:in:clippedBy: (in category 'MVC-compatibility') ----- - displayLines: linesInterval in: aParagraph clippedBy: visibleRectangle - "The central display routine. The call on the primitive - (scanCharactersFrom:to:in:rightX:) will be interrupted according to an - array of stop conditions passed to the scanner at which time the code to - handle the stop condition is run and the call on the primitive continued - until a stop condition returns true (which means the line has - terminated)." - | runLength done stopCondition leftInRun startIndex string lastPos | - "leftInRun is the # of characters left to scan in the current run; - when 0, it is time to call 'self setStopConditions'" - morphicOffset := 0@0. - leftInRun := 0. - self initializeFromParagraph: aParagraph clippedBy: visibleRectangle. - ignoreColorChanges := false. - paragraph := aParagraph. - foregroundColor := paragraphColor := aParagraph foregroundColor. - backgroundColor := aParagraph backgroundColor. - aParagraph backgroundColor isTransparent - ifTrue: [fillBlt := nil] - ifFalse: [fillBlt := bitBlt copy. "Blt to fill spaces, tabs, margins" - fillBlt sourceForm: nil; sourceOrigin: 0@0. - fillBlt fillColor: aParagraph backgroundColor]. - rightMargin := aParagraph rightMarginForDisplay. - lineY := aParagraph topAtLineIndex: linesInterval first. - bitBlt destForm deferUpdatesIn: visibleRectangle while: [ - linesInterval do: - [:lineIndex | - leftMargin := aParagraph leftMarginForDisplayForLine: lineIndex alignment: (alignment ifNil:[textStyle alignment]). - destX := (runX := leftMargin). - line := aParagraph lines at: lineIndex. - lineHeight := line lineHeight. - fillBlt == nil ifFalse: - [fillBlt destX: visibleRectangle left destY: lineY - width: visibleRectangle width height: lineHeight; copyBits]. - lastIndex := line first. - leftInRun <= 0 - ifTrue: [self setStopConditions. "also sets the font" - leftInRun := text runLengthFor: line first]. - baselineY := lineY + line baseline. - destY := baselineY - font ascent. "Should have happened in setFont" - runLength := leftInRun. - runStopIndex := lastIndex + (runLength - 1) min: line last. - leftInRun := leftInRun - (runStopIndex - lastIndex + 1). - spaceCount := 0. - done := false. - string := text string. - self handleIndentation. - [done] whileFalse:[ - startIndex := lastIndex. - lastPos := destX@destY. - stopCondition := self scanCharactersFrom: lastIndex to: runStopIndex - in: string rightX: rightMargin stopConditions: stopConditions - kern: kern. - lastIndex >= startIndex ifTrue:[ - font displayString: string on: bitBlt - from: startIndex to: lastIndex at: lastPos kern: kern baselineY: baselineY]. - "see setStopConditions for stopping conditions for displaying." - done := self perform: stopCondition]. - fillBlt == nil ifFalse: - [fillBlt destX: destX destY: lineY width: visibleRectangle right-destX height: lineHeight; copyBits]. - lineY := lineY + lineHeight]]! Item was removed: - ----- Method: MultiDisplayScanner>>endOfRun (in category 'stop conditions') ----- - endOfRun - "The end of a run in the display case either means that there is actually - a change in the style (run code) to be associated with the string or the - end of this line has been reached." - | runLength | - lastIndex = line last ifTrue: [^true]. - runX := destX. - runLength := text runLengthFor: (lastIndex := lastIndex + 1). - runStopIndex := lastIndex + (runLength - 1) min: line last. - self setStopConditions. - ^ false! Item was removed: - ----- Method: MultiDisplayScanner>>initializeFromParagraph:clippedBy: (in category 'MVC-compatibility') ----- - initializeFromParagraph: aParagraph clippedBy: clippingRectangle - - super initializeFromParagraph: aParagraph clippedBy: clippingRectangle. - bitBlt := BitBlt asGrafPort toForm: aParagraph destinationForm. - bitBlt sourceX: 0; width: 0. "Init BitBlt so that the first call to a primitive will not fail" - bitBlt combinationRule: Form paint. - bitBlt colorMap: - (Bitmap with: 0 "Assumes 1-bit deep fonts" - with: (bitBlt destForm pixelValueFor: aParagraph foregroundColor)). - bitBlt clipRect: clippingRectangle. - ! Item was removed: - ----- Method: MultiDisplayScanner>>isBreakableAt:in:in: (in category 'multilingual scanning') ----- - isBreakableAt: index in: sourceString in: encodingClass - - ^ false. - ! Item was removed: - ----- Method: MultiDisplayScanner>>paddedSpace (in category 'stop conditions') ----- - paddedSpace - "Each space is a stop condition when the alignment is right justified. - Padding must be added to the base width of the space according to - which space in the line this space is and according to the amount of - space that remained at the end of the line when it was composed." - - spaceCount := spaceCount + 1. - destX := destX + spaceWidth + (line justifiedPadFor: spaceCount). - lastIndex := lastIndex + 1. - ^ false! Item was removed: - ----- Method: MultiDisplayScanner>>placeEmbeddedObject: (in category 'scanning') ----- - placeEmbeddedObject: anchoredMorph - anchoredMorph relativeTextAnchorPosition ifNotNil:[ - anchoredMorph position: - anchoredMorph relativeTextAnchorPosition + - (anchoredMorph owner textBounds origin x @ 0) - - (0@morphicOffset y) + (0@lineY). - ^true - ]. - (super placeEmbeddedObject: anchoredMorph) ifFalse: [^ false]. - anchoredMorph isMorph ifTrue: [ - anchoredMorph position: ((destX - anchoredMorph width)@lineY) - morphicOffset - ] ifFalse: [ - destY := lineY. - baselineY := lineY + anchoredMorph height.. - runX := destX. - anchoredMorph - displayOn: bitBlt destForm - at: destX - anchoredMorph width @ destY - clippingBox: bitBlt clipRect - ]. - ^ true! Item was removed: - ----- Method: MultiDisplayScanner>>plainTab (in category 'stop conditions') ----- - plainTab - | oldX | - oldX := destX. - super plainTab. - fillBlt == nil ifFalse: - [fillBlt destX: oldX destY: destY width: destX - oldX height: font height; copyBits]! Item was removed: - ----- Method: MultiDisplayScanner>>presentationText: (in category 'private') ----- - presentationText: t - - text := t. - ! Item was removed: - ----- Method: MultiDisplayScanner>>scanMultiCharactersCombiningFrom:to:in:rightX:stopConditions:kern: (in category 'multilingual scanning') ----- - scanMultiCharactersCombiningFrom: startIndex to: stopIndex in: sourceString rightX: rightX stopConditions: stops kern: kernDelta - - | encoding f nextDestX maxAscii startEncoding char charValue | - lastIndex := startIndex. - lastIndex > stopIndex ifTrue: [lastIndex := stopIndex. ^ stops at: EndOfRun]. - startEncoding := (sourceString at: startIndex) leadingChar. - font ifNil: [font := (TextConstants at: #DefaultMultiStyle) fontArray at: 1]. - ((font isMemberOf: StrikeFontSet) or: [font isKindOf: TTCFontSet]) ifTrue: [ - [f := font fontArray at: startEncoding + 1] - on: Exception do: [:ex | f := font fontArray at: 1]. - f ifNil: [ f := font fontArray at: 1]. - maxAscii := f maxAscii. - spaceWidth := f widthOf: Space. - ] ifFalse: [ - maxAscii := font maxAscii. - ]. - - [lastIndex <= stopIndex] whileTrue: [ - encoding := (sourceString at: lastIndex) leadingChar. - encoding ~= startEncoding ifTrue: [lastIndex := lastIndex - 1. ^ stops at: EndOfRun]. - char := (sourceString at: lastIndex). - charValue := char charCode. - charValue > maxAscii ifTrue: [charValue := maxAscii]. - (encoding = 0 and: [(stopConditions at: charValue + 1) ~~ nil]) ifTrue: [ - ^ stops at: charValue + 1 - ]. - nextDestX := destX + (self widthOf: char inFont: font). - nextDestX > rightX ifTrue: [^ stops at: CrossedX]. - destX := nextDestX + kernDelta. - lastIndex := lastIndex + 1. - ]. - lastIndex := stopIndex. - ^ stops at: EndOfRun! Item was removed: - ----- Method: MultiDisplayScanner>>setDestForm: (in category 'private') ----- - setDestForm: df - bitBlt setDestForm: df.! Item was removed: - ----- Method: MultiDisplayScanner>>setFont (in category 'private') ----- - setFont - foregroundColor := paragraphColor. - super setFont. "Sets font and emphasis bits, and maybe foregroundColor" - font installOn: bitBlt foregroundColor: foregroundColor backgroundColor: Color transparent. - text ifNotNil:[ - baselineY := lineY + line baseline. - destY := baselineY - font ascent]. - ! Item was removed: - ----- Method: MultiDisplayScanner>>setPort: (in category 'private') ----- - setPort: aBitBlt - "Install the BitBlt to use" - bitBlt := aBitBlt. - bitBlt sourceX: 0; width: 0. "Init BitBlt so that the first call to a primitive will not fail" - bitBlt sourceForm: nil. "Make sure font installation won't be confused" - ! Item was removed: - ----- Method: MultiDisplayScanner>>setStopConditions (in category 'stop conditions') ----- - setStopConditions - "Set the font and the stop conditions for the current run." - - self setFont. - self setConditionArray: (alignment = Justified ifTrue: [#paddedSpace]). - - " - alignment = Justified ifTrue: [ - stopConditions == DefaultStopConditions - ifTrue:[stopConditions := stopConditions copy]. - stopConditions at: Space asciiValue + 1 put: #paddedSpace] - "! Item was removed: - ----- Method: MultiDisplayScanner>>tab (in category 'stop conditions') ----- - tab - self plainTab. - lastIndex := lastIndex + 1. - ^ false! Item was removed: - ----- Method: MultiDisplayScanner>>text:textStyle:foreground:background:fillBlt:ignoreColorChanges: (in category 'private') ----- - text: t textStyle: ts foreground: foreColor background: backColor fillBlt: blt ignoreColorChanges: shadowMode - text := t. - textStyle := ts. - foregroundColor := paragraphColor := foreColor. - (backgroundColor := backColor) isTransparent ifFalse: - [fillBlt := blt. - fillBlt fillColor: backgroundColor]. - ignoreColorChanges := shadowMode! Item was removed: - ----- Method: MultiDisplayScanner>>textColor: (in category 'private') ----- - textColor: textColor - ignoreColorChanges ifTrue: [^ self]. - foregroundColor := textColor! Item was removed: - NewParagraph subclass: #MultiNewParagraph - instanceVariableNames: 'presentationText presentationLines' - classVariableNames: '' - poolDictionaries: 'TextConstants' - category: 'Etoys-Squeakland-Multilingual-Scanning'! Item was removed: - ----- Method: MultiNewParagraph>>displayOn:using:at: (in category 'fonts-display') ----- - displayOn: aCanvas using: displayScanner at: somePosition - "Send all visible lines to the displayScanner for display" - - | visibleRectangle offset leftInRun line | - visibleRectangle := aCanvas clipRect. - offset := somePosition - positionWhenComposed. - leftInRun := 0. - (self lineIndexForPoint: visibleRectangle topLeft) - to: (self lineIndexForPoint: visibleRectangle bottomRight) - do: [:i | line := lines at: i. - self displaySelectionInLine: line on: aCanvas. - line first <= line last ifTrue: - [leftInRun := displayScanner displayLine: line - offset: offset leftInRun: leftInRun]]. - ! Item was removed: - ----- Method: MultiNewParagraph>>displayOnTest:using:at: (in category 'fonts-display') ----- - displayOnTest: aCanvas using: displayScanner at: somePosition - "Send all visible lines to the displayScanner for display" - - | visibleRectangle offset leftInRun line | - (presentationText isNil or: [presentationLines isNil]) ifTrue: [ - ^ self displayOn: aCanvas using: displayScanner at: somePosition. - ]. - visibleRectangle := aCanvas clipRect. - offset := somePosition - positionWhenComposed. - leftInRun := 0. - (self lineIndexForPoint: visibleRectangle topLeft) - to: (self lineIndexForPoint: visibleRectangle bottomRight) - do: [:i | line := presentationLines at: i. - self displaySelectionInLine: line on: aCanvas. - line first <= line last ifTrue: - [leftInRun := displayScanner displayLine: line - offset: offset leftInRun: leftInRun]]. - ! Item was removed: - ----- Method: MultiNewParagraph>>multiComposeLinesFrom:to:delta:into:priorLines:atY: (in category 'composition') ----- - multiComposeLinesFrom: start to: stop delta: delta into: lineColl priorLines: priorLines - atY: startingY - "While the section from start to stop has changed, composition may ripple all the way to the end of the text. However in a rectangular container, if we ever find a line beginning with the same character as before (ie corresponding to delta in the old lines), then we can just copy the old lines from there to the end of the container, with adjusted indices and y-values" - - | newResult composer presentationInfo | - - composer := MultiTextComposer new. - presentationLines := nil. - presentationText := nil. - newResult := composer - multiComposeLinesFrom: start - to: stop - delta: delta - into: lineColl - priorLines: priorLines - atY: startingY - textStyle: textStyle - text: text - container: container - wantsColumnBreaks: wantsColumnBreaks == true. - lines := newResult first asArray. - maxRightX := newResult second. - presentationInfo := composer getPresentationInfo. - presentationLines := presentationInfo first asArray. - presentationText := presentationInfo second. - "maxRightX printString displayAt: 0@0." - ^maxRightX - ! Item was removed: - ----- Method: MultiNewParagraph>>presentationLines (in category 'accessing') ----- - presentationLines - - ^ presentationLines. - ! Item was removed: - ----- Method: MultiNewParagraph>>presentationText (in category 'accessing') ----- - presentationText - - ^ presentationText. - ! Item was removed: - TextComposer subclass: #MultiTextComposer - instanceVariableNames: 'presentation presentationLines' - classVariableNames: '' - poolDictionaries: 'TextConstants' - category: 'Etoys-Squeakland-Multilingual-Scanning'! Item was removed: - ----- Method: MultiTextComposer>>composeEachRectangleIn: (in category 'as yet unclassified') ----- - composeEachRectangleIn: rectangles - - | myLine lastChar | - - 1 to: rectangles size do: [:i | - currCharIndex <= theText size ifFalse: [^false]. - myLine := scanner - composeFrom: currCharIndex - inRectangle: (rectangles at: i) - firstLine: isFirstLine - leftSide: i=1 - rightSide: i=rectangles size. - lines addLast: myLine. - presentationLines addLast: scanner getPresentationLine. - presentation ifNil: [presentation := scanner getPresentation] - ifNotNil: [presentation := presentation, scanner getPresentation]. - actualHeight := actualHeight max: myLine lineHeight. "includes font changes" - currCharIndex := myLine last + 1. - lastChar := theText at: myLine last. - lastChar = Character cr ifTrue: [^#cr]. - wantsColumnBreaks ifTrue: [ - lastChar = TextComposer characterForColumnBreak ifTrue: [^#columnBreak]. - ]. - ]. - ^false! Item was removed: - ----- Method: MultiTextComposer>>getPresentationInfo (in category 'as yet unclassified') ----- - getPresentationInfo - - ^ Array with: presentationLines with: presentation. - ! Item was removed: - ----- Method: MultiTextComposer>>multiComposeLinesFrom:to:delta:into:priorLines:atY:textStyle:text:container:wantsColumnBreaks: (in category 'as yet unclassified') ----- - multiComposeLinesFrom: argStart to: argStop delta: argDelta into: argLinesCollection priorLines: argPriorLines atY: argStartY textStyle: argTextStyle text: argText container: argContainer wantsColumnBreaks: argWantsColumnBreaks - - wantsColumnBreaks := argWantsColumnBreaks. - lines := argLinesCollection. - presentationLines := argLinesCollection copy. - theTextStyle := argTextStyle. - theText := argText. - theContainer := argContainer. - deltaCharIndex := argDelta. - currCharIndex := startCharIndex := argStart. - stopCharIndex := argStop. - prevLines := argPriorLines. - currentY := argStartY. - defaultLineHeight := theTextStyle lineGrid. - maxRightX := theContainer left. - possibleSlide := stopCharIndex < theText size and: [theContainer isMemberOf: Rectangle]. - nowSliding := false. - prevIndex := 1. - scanner := MultiCompositionScanner new text: theText textStyle: theTextStyle. - scanner wantsColumnBreaks: wantsColumnBreaks. - isFirstLine := true. - self composeAllLines. - isFirstLine ifTrue: ["No space in container or empty text" - self - addNullLineWithIndex: startCharIndex - andRectangle: (theContainer topLeft extent: 0@defaultLineHeight) - ] ifFalse: [ - self fixupLastLineIfCR - ]. - ^{lines asArray. maxRightX} - - !

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The Inbox: MorphicExtras-hjh.202.mcz
by commits＠source.squeak.org 16 Sep '17

16 Sep '17

A new version of MorphicExtras was added to project The Inbox: http://source.squeak.org/inbox/MorphicExtras-hjh.202.mcz ==================== Summary ==================== Name: MorphicExtras-hjh.202 Author: hjh Time: 24 January 2017, 9:18:04.266965 pm UUID: 790dbeec-ba66-4070-b51f-a0225aef4a9f Ancestors: MorphicExtras-cmm.201 Maintain aspect ratio in thumbnail display of imported graphic =============== Diff against MorphicExtras-cmm.201 =============== Item was changed: ----- Method: GraphicalDictionaryMenu>>initializeFor:fromDictionary: (in category 'initialization') ----- initializeFor: aTarget fromDictionary: aDictionary "Initialize me for a target and a dictionary." | anIndex aButton | self baseDictionary: aDictionary. target := aTarget. coexistWithOriginal := true. self extent: 210 @ 210. self clipSubmorphs: true. self layoutPolicy: ProportionalLayout new. aButton := (IconicButton new) borderWidth: 0; labelGraphic: (ScriptingSystem formAtKey: 'TinyMenu'); color: Color transparent; actWhen: #buttonDown; actionSelector: #showMenu; target: self; setBalloonText: 'menu'. self addMorph: aButton fullFrame: (LayoutFrame fractions: (0.5 @ 0 extent: 0 @ 0) offsets: (-50 @ 6 extent: aButton extent)). aButton := (SimpleButtonMorph new) target: self; borderColor: Color black; label: 'Prev'; actionSelector: #downArrowHit; actWhen: #whilePressed; setBalloonText: 'show previous picture'; yourself. self addMorph: aButton fullFrame: (LayoutFrame fractions: (0.5 @ 0 extent: 0 @ 0) offsets: (-24 @ 4 extent: aButton extent)). aButton := (SimpleButtonMorph new) target: self; borderColor: Color black; label: 'Next'; actionSelector: #upArrowHit; actWhen: #whilePressed; setBalloonText: 'show next pictutre'. self addMorph: aButton fullFrame: (LayoutFrame fractions: (0.5 @ 0 extent: 0 @ 0) offsets: (24 @ 4 extent: aButton extent)). self addMorph: ((UpdatingStringMorph new) contents: ' '; target: self; putSelector: #renameGraphicTo:; getSelector: #truncatedNameOfGraphic; useStringFormat; setBalloonText: 'The name of the current graphic'; yourself) fullFrame: (LayoutFrame fractions: (0 @ 0 extent: 1 @ 0) offsets: (10 @ 40 corner: -10 @ 60)). self addMorph: ((Morph new) extent: 100 @ 4; color: Color black) fullFrame: (LayoutFrame fractions: (0 @ 0 extent: 1 @ 0) offsets: (0 @ 60 corner: 0 @ 64)). formDisplayMorph := (Thumbnail new) extent: 100 @ 100; useInterpolation: true; maxWidth: 3000 minHeight: 100; yourself. + formDisplayMorph layoutFrame: + (LayoutFrame fractions: (0 @ 0 extent: 0@0) + offsets: (8 @ 72 corner: 108 @ 172)). + self addMorph: formDisplayMorph. - self addMorph: formDisplayMorph - fullFrame: (LayoutFrame fractions: (0 @ 0 extent: 0@0) - offsets: (8 @ 72 corner: 108 @ 172)). self minimumExtent: 116@180. target ifNotNil: [(anIndex := formChoices indexOf: target form ifAbsent: []) ifNotNil: [currentIndex := anIndex]]. self updateThumbnail!

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Inbox/Files-monty.172
by tim Rowledge 06 Sep '17

06 Sep '17

I happened upon Monty’s suggested changes to file opening. They look pretty reasonable to me but since I don’t use Windows and it looks mostly like changes that relate to the old Windows issue of running out of file descriptors and needing to GC, I really can’t have a meaningful opinion. Are we going to incorporate the changes? tim -- tim Rowledge; tim(a)rowledge.org; http://www.rowledge.org/tim Strange OpCodes: RIW: Re-Invent Wheel

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Re: [squeak-dev] [Vm-dev] Use less CPU (improve battery life or reduce cost in the cloud)
by Marcel Taeumel 04 Sep '17

04 Sep '17

Hi Holger, The Morphic main loop empties the event queue (mouse & keyboard) in each cycle. It also checks for drawing requests and stepping. If that processing goes too fast, it tries to free CPU time via a delay (so that the idle process can run if no other). No, it does not make sense to get rid of that pause/delay/tick. ;-) The system is NOT event-based at that lower level. It is just polling/looping. A single UI process, which sleeps occasionally. By design. Note that if you want to run that in the cloud, just avoid busy morphs and Morphic should use very little CPU resources. Best, Marcel Am 29.08.2017 23:29:21 schrieb Holger Freyther <holger(a)freyther.de>: Hi, I have done some early prototype for the Unix VM end of 2015(?) and I have improved and repeated these for MacOS now and the thread based heartbeat (now that it is the universal default). I won't make it to ESUG this year but this might be something to play with? The motivations is simple: Polling increases the CPU usage which will reduce your battery life, takes away resources from other processes (e.g. more Pharo images) or these days increases your cloud computing bill. On top of that it might increase network latency (time from socket becoming readable to the time the semaphore is signaled). To complete the work we have work inside the Image and the VM and some of it is on the way and others might need more discussion. The idle process: ProcessorScheduler>># idleProcess "A default background process which is invisible." [true] whileTrue: [self relinquishProcessorForMicroseconds: 1000] Let's please yield the CPU for more than a 1ms. Unless I am missing something an expired Delay or network IO would make us wake up earlier anyway? The delay scheduler: The VM supports that when the next wake-up time is set to 0, the VM can sleep indefinitely. There is a pending patch to sleep "0" in our Delay scheduler. Currently we force a wake-up earlier than that. I think we should trust the VM to do wake us up even if it is a second away. Morphic UI: I don't understand the WorldState>>#interCyclePause but then I never looked at Morphic. Do we really need to poll like that? Under which circumstances does the world update? We get an event (where we have the event semaphore), we get some I/O (where we have a semaphore) or we have a timeout (where we sleep on a semaphore). Did anyone ever look at removing the tick? VM I/O: Currently we receive a SIGIO but from what I can see (and I still need to write a benchmark) the processing might be delayed 20ms? My hack removes the usage of nextPollUsecs and instead checks a variable that is set by the SIGIO handler. Besides missing memory barriers this should work(tm). The biggest issue seems that for macos/ios the input is driven by polling. E.g. some wheel events seem to require to pump the event queue. Is this something we could trigger from the image in the future? I had hoped to get a fd to a machport we could get SIGIO for.. but that doesn't seem to exist. I have hacked out the honoring of the relinquish delay, added the polling into a iOS specific routine and thanks to the Morphic Delay we bump the event loop frequently enough. VM heartbeat thread: The process keeps ticking even if the VM doesn't run. E.g. sleeps and waits for an event. There is a cost in deciding when to halt the thread so there must be a cut-off for which delays we bother to disable the heartbeat thread. I think the current code would allow the hearbeat to drift so the new code might just make it a bit worse. Where are we now? I have pushed my changes to https://github.com/zecke/opensmalltalk-vm/tree/mac-use-less-cpu and would be happy to have people look at it, look at the memory synchronization, maybe run to see if they notice extra delays or such? I started the same image with the plain-vm and my hacked one and let it run for about 20min. The output is coming from top. COMMAND %CPU TIME Pharo 4.3 00:48.49 Pharo 0.8 00:10.20 Looking for comments and feedback. regards holger

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