Squeak-dev January 2021

squeak-dev@lists.squeakfoundation.org

38 participants
172 discussions

Proposal: Geometry Classes
by patrick.rein＠hpi.uni-potsdam.de 11 Mar '21

11 Mar '21

Hi everyone, during some recent clean-up an issue with geometry objects came up. As a result the following idea came up which I thereby would like to put out for an initial discussion. In case we find that this might be useful, I would continue by implementing a first prototype of the package as a foundation of a more in-depth discussion later on. Bests Patrick # Squeak Change Proposal - Geometry Package ## Why? Squeak implements basic geometry logic in too many different places. For example intersection of different kinds of geometric objects is implemented all over Morphic, ST80, Balloon, Graphics, and Etoys. Such extensive scattering across packages and classes impedes modularity, that is, readability and extensibility. An example for this recently came up when we discovered an issue with testing for graphical intersections between PolygonMorph and RectangleMorph. It was not possible to compute that overlapping area because the class Rectangle omits to provide an important method. A quick fix would entail unnecessary dependencies (here: Morphic -> Balloon) or duplicated code (see also http://bugs.squeak.org/view.php?id=7872). Consequently, we might want to modularize the geometry objects and operations. As a side effect, dependent packages such as Morphic can be simplified a little bit (more). ## Scope The proposed package should cover basic 2D geometric objects and their operations represented by the following classes: - Point - Line - LineSegment - Polygon - Rectangle (as an optimization as it could be represented as a special Polygon already) Most classes could simply be moved from their previous packages. Afterwards the interfaces would need to be made consistent with each other to allow interoperability of all geometry classes within the new package. ### Affected classes: - All classes in ST80-Paths - LineSegement, Bezier2Segment, Bezier3Segment (Balloon-Geometry) - Rectangle, Quadrangle, Point (Graphics-Primitives) - LineIntersections, LineIntersectionSegment, LineIntersectionEvent (Etoys-Squeakland-Graphics-Tools-Intersection) ## Open questions - Should this become a single new package or a subcategory in the Graphics package? - Should the package contain an Ellipses class? - Should we model curved line segments as BezierLineSegments, CurvedLineSegment, or Arc? ## Risks - This would potentially deprecate the existing ST80 geometry classes (ST80-Paths) - Some of the new classes will cause name clashes with existing classes. For example Line is currently in ST-80 and represents a line segment, and the class LineSegment is a line segment but not in the geometric sense as it also incorporates arcs. Both names might then be used by new classes with different meanings. This might be mitigated by introducing a pre-/postfix for the names of the new classes.

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find original change set
by Javier Orsaria 09 Mar '21

09 Mar '21

Hi, I was trying to use, in VersionsBrowser, the feature "find original change set" for a method. In old versions (3.8 and earlier) this work fine. But in 3.10 and 3.9 don´t. I followed the sequence and detect the problem at MethodChangeRecord-noteNewMethod: noteNewMethod: newMethod "NEVER do this. It is evil." currentMethod _ nil. should be: noteNewMethod: newMethod "NEVER do this. It is evil." currentMethod _ newMethod. This way work as I expect. But with that comment I understand was intentioned. What is the problem with this? I can´t see it... I'm the devil? Thanks, Javier

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Cannot read 4.3 image on Raspberry Pi
by Jim Rosenberg 03 Feb '21

03 Feb '21

Ouch! I have a lot of artistic work which is developed in Squeak on Linux -- currently only up to 4.3 (which is working fine for me, so I haven't upgraded). I'm trying to run one of my 4.3 images on a Raspberry Pi 3B+ which is at Raspbian 10 (buster), and with the current armv6 squeak VM, getting the message This interpreter (vers. 6521) cannot read image file (vers. 6504). Suggestions? -Thanks in advance, Jim

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Transcript losing output when #processPreemptionYields = true
by jaromir 03 Feb '21

03 Feb '21

Transcript may lose some output for #processPreemptionYields = true Example (semaphore prearmed with 2 signals): |accessProtect| Smalltalk vm processPreemptionYields: true. Transcript cr. accessProtect := Semaphore new signal signal. [accessProtect critical: [ Transcript cr; show: 'Process 1a '. 10000 factorial. Transcript cr; show: 'Process 1b '. ]] fork. Processor yield. [accessProtect critical: [ Transcript cr; show: 'Process 2a '. 10000 factorial. Transcript cr; show: 'Process 2b '. ]] forkAt: 41. Transcript cr; show: 'Process UIa '. 0.3 second wait. Transcript cr; show: 'Process UIb '. Output: "this is ok" Process 1a Process 2a Process 2b Process 1b Process UIa Process UIb "Here Process 2a output missing!" Process 1a Process 2b Process UIa Process 1b Process UIb "Or even this came out" Process 1a Process 2b Process 1b Process UIb The problem is probably related to the post: Transcript error when forceUpdate: false http://forum.world.st/Transcript-error-when-forceUpdate-false-td5126397.html Similar workaround (Collections-mt.923 @ inbox) may fix this issue too. Tested on Squeak6.0alpha-20182-64bit-freshCopy (Collections-dtl.923 @ trunk) -- Sent from: http://forum.world.st/Squeak-Dev-f45488.html

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Unicode Ranges you might want to copy
by gettimothy 02 Feb '21

02 Feb '21

Hi Folks, You might find the below handy. Fwiw, I have coded the UnicodeRangeBrowser SeasideApp to display all the below (it times out before all display, I will be doing refactor and more development). I am also coding a utility class to provide information such as below in a variety of ways. fwiw, here are my current todo notes for this font information. unifont provide link to the unicode spec. provide browser fonts list. provide squeak fonts list. provide phare fonts list ^self squeak fonts list: what are Variant Selectors ? show gaps in the ranges. provide a link(s) to required fonts that will make a range display. displays on: browser list, squeak, emacs, xterm... status bar...broken, partial, full. use cases for fonts pairs with xyz example superscripts and subscripts The goal is to show what works and to find/test fonts that will support stuff. I am modelling the Seaside app on https://jrgraphix.net/research/unicode_blocks.php But...for each unicode range, I intend to display smalltalk specific helpers on what/where to get fonts for both the browser side and the image side. --------------snip ------------------- (16r000020 asCharacter to: 16r00007F asCharacter) -> 'Basic Latin' (16r0000A0 asCharacter to: 16r0000FF asCharacter) -> 'Latin-1 Supplement' (16r000100 asCharacter to: 16r00017F asCharacter) -> 'Latin Extended-A' (16r000180 asCharacter to: 16r00024F asCharacter) -> 'Latin Extended-B' (16r000250 asCharacter to: 16r0002AF asCharacter) -> 'IPA Extensions' (16r0002B0 asCharacter to: 16r0002FF asCharacter) -> 'Spacing Modifier Letters' (16r000300 asCharacter to: 16r00036F asCharacter) -> 'Combining Diacritical Marks' (16r000370 asCharacter to: 16r0003FF asCharacter) -> 'Greek and Coptic' (16r000400 asCharacter to: 16r0004FF asCharacter) -> 'Cyrillic' (16r000500 asCharacter to: 16r00052F asCharacter) -> 'Cyrillic Supplementary' (16r000530 asCharacter to: 16r00058F asCharacter) -> 'Armenian' (16r000590 asCharacter to: 16r0005FF asCharacter) -> 'Hebrew' (16r000600 asCharacter to: 16r0006FF asCharacter) -> 'Arabic' (16r000700 asCharacter to: 16r00074F asCharacter) -> 'Syriac' (16r000780 asCharacter to: 16r0007BF asCharacter) -> 'Thaana' (16r000900 asCharacter to: 16r00097F asCharacter) -> 'Devanagari' (16r000980 asCharacter to: 16r0009FF asCharacter) -> 'Bengali' (16r000A00 asCharacter to: 16r000A7F asCharacter) -> 'Gurmukhi' (16r000A80 asCharacter to: 16r000AFF asCharacter) -> 'Gujarati' (16r000B00 asCharacter to: 16r000B7F asCharacter) -> 'Oriya' (16r000B80 asCharacter to: 16r000BFF asCharacter) -> 'Tamil' (16r000C00 asCharacter to: 16r000C7F asCharacter) -> 'Telugu' (16r000C80 asCharacter to: 16r000CFF asCharacter) -> 'Kannada' (16r000D00 asCharacter to: 16r000D7F asCharacter) -> 'Malayalam' (16r000D80 asCharacter to: 16r000DFF asCharacter) -> 'Sinhala' (16r000E00 asCharacter to: 16r000E7F asCharacter) -> 'Thai' (16r000E80 asCharacter to: 16r000EFF asCharacter) -> 'Lao' (16r000F00 asCharacter to: 16r000FFF asCharacter) -> 'Tibetan' (16r001000 asCharacter to: 16r00109F asCharacter) -> 'Myanmar' (16r0010A0 asCharacter to: 16r0010FF asCharacter) -> 'Georgian' (16r001100 asCharacter to: 16r0011FF asCharacter) -> 'Hangul Jamo' (16r001200 asCharacter to: 16r00137F asCharacter) -> 'Ethiopic' (16r0013A0 asCharacter to: 16r0013FF asCharacter) -> 'Cherokee' (16r001400 asCharacter to: 16r00167F asCharacter) -> 'Unified Canadian Aboriginal Syllabics' (16r001680 asCharacter to: 16r00169F asCharacter) -> 'Ogham' (16r0016A0 asCharacter to: 16r0016FF asCharacter) -> 'Runic' (16r001700 asCharacter to: 16r00171F asCharacter) -> 'Tagalog' (16r001720 asCharacter to: 16r00173F asCharacter) -> 'Hanunoo' (16r001740 asCharacter to: 16r00175F asCharacter) -> 'Buhid' (16r001760 asCharacter to: 16r00177F asCharacter) -> 'Tagbanwa' (16r001780 asCharacter to: 16r0017FF asCharacter) -> 'Khmer' (16r001800 asCharacter to: 16r0018AF asCharacter) -> 'Mongolian' (16r001900 asCharacter to: 16r00194F asCharacter) -> 'Limbu' (16r001950 asCharacter to: 16r00197F asCharacter) -> 'Tai Le' (16r0019E0 asCharacter to: 16r0019FF asCharacter) -> 'Khmer Symbols' (16r001D00 asCharacter to: 16r001D7F asCharacter) -> 'Phonetic Extensions' (16r001E00 asCharacter to: 16r001EFF asCharacter) -> 'Latin Extended Additional' (16r001F00 asCharacter to: 16r001FFF asCharacter) -> 'Greek Extended' (16r002000 asCharacter to: 16r00206F asCharacter) -> 'General Punctuation' (16r002070 asCharacter to: 16r00209F asCharacter) -> 'Superscripts and Subscripts' (16r0020A0 asCharacter to: 16r0020CF asCharacter) -> 'Currency Symbols' (16r0020D0 asCharacter to: 16r0020FF asCharacter) -> 'Combining Diacritical Marks for Symbols' (16r002100 asCharacter to: 16r00214F asCharacter) -> 'Letterlike Symbols' (16r002150 asCharacter to: 16r00218F asCharacter) -> 'Number Forms' (16r002190 asCharacter to: 16r0021FF asCharacter) -> 'Arrows' (16r002200 asCharacter to: 16r0022FF asCharacter) -> 'Mathematical Operators' (16r002300 asCharacter to: 16r0023FF asCharacter) -> 'Miscellaneous Technical' (16r002400 asCharacter to: 16r00243F asCharacter) -> 'Control Pictures' (16r002440 asCharacter to: 16r00245F asCharacter) -> 'Optical Character Recognition' (16r002460 asCharacter to: 16r0024FF asCharacter) -> 'Enclosed Alphanumerics' (16r002500 asCharacter to: 16r00257F asCharacter) -> 'Box Drawing' (16r002580 asCharacter to: 16r00259F asCharacter) -> 'Block Elements' (16r0025A0 asCharacter to: 16r0025FF asCharacter) -> 'Geometric Shapes' (16r002600 asCharacter to: 16r0026FF asCharacter) -> 'Miscellaneous Symbols' (16r002700 asCharacter to: 16r0027BF asCharacter) -> 'Dingbats' (16r0027C0 asCharacter to: 16r0027EF asCharacter) -> 'Miscellaneous Mathematical Symbols-A' (16r0027F0 asCharacter to: 16r0027FF asCharacter) -> 'Supplemental Arrows-A' (16r002800 asCharacter to: 16r0028FF asCharacter) -> 'Braille Patterns' (16r002900 asCharacter to: 16r00297F asCharacter) -> 'Supplemental Arrows-B' (16r002980 asCharacter to: 16r0029FF asCharacter) -> 'Miscellaneous Mathematical Symbols-B' (16r002A00 asCharacter to: 16r002AFF asCharacter) -> 'Supplemental Mathematical Operators' (16r002B00 asCharacter to: 16r002BFF asCharacter) -> 'Miscellaneous Symbols and Arrows' (16r002E80 asCharacter to: 16r002EFF asCharacter) -> 'CJK Radicals Supplement' (16r002F00 asCharacter to: 16r002FDF asCharacter) -> 'Kangxi Radicals' (16r002FF0 asCharacter to: 16r002FFF asCharacter) -> 'Ideographic Description Characters' (16r003000 asCharacter to: 16r00303F asCharacter) -> 'CJK Symbols and Punctuation' (16r003040 asCharacter to: 16r00309F asCharacter) -> 'Hiragana' (16r0030A0 asCharacter to: 16r0030FF asCharacter) -> 'Katakana' (16r003100 asCharacter to: 16r00312F asCharacter) -> 'Bopomofo' (16r003130 asCharacter to: 16r00318F asCharacter) -> 'Hangul Compatibility Jamo' (16r003190 asCharacter to: 16r00319F asCharacter) -> 'Kanbun' (16r0031A0 asCharacter to: 16r0031BF asCharacter) -> 'Bopomofo Extended' (16r0031F0 asCharacter to: 16r0031FF asCharacter) -> 'Katakana Phonetic Extensions' (16r003200 asCharacter to: 16r0032FF asCharacter) -> 'Enclosed CJK Letters and Months' (16r003300 asCharacter to: 16r0033FF asCharacter) -> 'CJK Compatibility' (16r003400 asCharacter to: 16r004DBF asCharacter) -> 'CJK Unified Ideographs Extension A' (16r004DC0 asCharacter to: 16r004DFF asCharacter) -> 'Yijing Hexagram Symbols' (16r004E00 asCharacter to: 16r009FFF asCharacter) -> 'CJK Unified Ideographs' (16r00A000 asCharacter to: 16r00A48F asCharacter) -> 'Yi Syllables' (16r00A490 asCharacter to: 16r00A4CF asCharacter) -> 'Yi Radicals' (16r00AC00 asCharacter to: 16r00D7AF asCharacter) -> 'Hangul Syllables' (16r00D800 asCharacter to: 16r00DB7F asCharacter) -> 'High Surrogates' (16r00DB80 asCharacter to: 16r00DBFF asCharacter) -> 'High Private Use Surrogates' (16r00DC00 asCharacter to: 16r00DFFF asCharacter) -> 'Low Surrogates' (16r00E000 asCharacter to: 16r00F8FF asCharacter) -> 'Private Use Area' (16r00F900 asCharacter to: 16r00FAFF asCharacter) -> 'CJK Compatibility Ideographs' (16r00FB00 asCharacter to: 16r00FB4F asCharacter) -> 'Alphabetic Presentation Forms' (16r00FB50 asCharacter to: 16r00FDFF asCharacter) -> 'Arabic Presentation Forms-A' (16r00FE00 asCharacter to: 16r00FE0F asCharacter) -> 'Variation Selectors' (16r00FE20 asCharacter to: 16r00FE2F asCharacter) -> 'Combining Half Marks' (16r00FE30 asCharacter to: 16r00FE4F asCharacter) -> 'CJK Compatibility Forms' (16r00FE50 asCharacter to: 16r00FE6F asCharacter) -> 'Small Form Variants' (16r00FE70 asCharacter to: 16r00FEFF asCharacter) -> 'Arabic Presentation Forms-B' (16r00FF00 asCharacter to: 16r00FFEF asCharacter) -> 'Halfwidth and Fullwidth Forms' (16r00FFF0 asCharacter to: 16r00FFFF asCharacter) -> 'Specials' (16r010000 asCharacter to: 16r01007F asCharacter) -> 'Linear B Syllabary' (16r010080 asCharacter to: 16r0100FF asCharacter) -> 'Linear B Ideograms' (16r010100 asCharacter to: 16r01013F asCharacter) -> 'Aegean Numbers' (16r010300 asCharacter to: 16r01032F asCharacter) -> 'Old Italic' (16r010330 asCharacter to: 16r01034F asCharacter) -> 'Gothic' (16r010380 asCharacter to: 16r01039F asCharacter) -> 'Ugaritic' (16r010400 asCharacter to: 16r01044F asCharacter) -> 'Deseret' (16r010450 asCharacter to: 16r01047F asCharacter) -> 'Shavian' (16r010480 asCharacter to: 16r0104AF asCharacter) -> 'Osmanya' (16r010800 asCharacter to: 16r01083F asCharacter) -> 'Cypriot Syllabary' (16r01D000 asCharacter to: 16r01D0FF asCharacter) -> 'Byzantine Musical Symbols' (16r01D100 asCharacter to: 16r01D1FF asCharacter) -> 'Musical Symbols' (16r01D300 asCharacter to: 16r01D35F asCharacter) -> 'Tai Xuan Jing Symbols' (16r01D400 asCharacter to: 16r01D7FF asCharacter) -> 'Mathematical Alphanumeric Symbols' (16r020000 asCharacter to: 16r02A6DF asCharacter) -> 'CJK Unified Ideographs Extension B' (16r02F800 asCharacter to: 16r02FA1F asCharacter) -> 'CJK Compatibility Ideographs Supplement' (16r0E0000 asCharacter to: 16r0E007F asCharacter) -> 'Tags'

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Transcript error when forceUpdate: false (?)
by jaromir 01 Feb '21

01 Feb '21

I ran the following in Squeak 5.3: TranscriptStream forceUpdate: false. [ 10000 timesRepeat: [ Transcript show: 'x' ] ] forkAt: 39 When the Transcript window fills up, 'Message not understood' and 'Assertion failure' appear. I'm wondering is this a bug? Thanks. Jaromir <http://forum.world.st/file/t372955/Screenshot_2021-01-22_205244.png> -- Sent from: http://forum.world.st/Squeak-Dev-f45488.html

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The Inbox: System-ct.1213.mcz
by commits＠source.squeak.org 31 Jan '21

31 Jan '21

Christoph Thiede uploaded a new version of System to project The Inbox: http://source.squeak.org/inbox/System-ct.1213.mcz ==================== Summary ==================== Name: System-ct.1213 Author: ct Time: 31 January 2021, 8:25:50.362826 pm UUID: 389f6bbe-a0cb-764c-815d-369887fc2d39 Ancestors: System-eem.1212 Improves SmalltalkImage>>isHeadless to recognize double-dash arguments correctly. (It's still not perfect just because one could delete the empty DISPLAY env var on Linux, but accessing env vars in Trunk would probably be a larger project ...) =============== Diff against System-eem.1212 =============== Item was changed: ----- Method: SmalltalkImage>>isHeadless (in category 'vm parameters') ----- isHeadless "Answer whether the command-line specified to launch the VM headless." + | headlessOptions | + headlessOptions := #('display=none' '-headless' '-nodisplay' '-vm-display-null') + gather: [:option | {option. option copyWithFirst: $-}]. self optionsDo: + [ : each | (headlessOptions includes: each) ifTrue: [ ^ true ] ]. - [ : each | (#('display=none' '-headless' '-nodisplay' '-vm-display-null' ) includes: each) ifTrue: [ ^ true ] ]. ^ false!

1 0

(16r00E007F + 16r000001) asCharacter
by gettimothy 31 Jan '21

31 Jan '21

Hi Folks, I am diving into Unicode and resultant parts for my WikitextParser work and am asking for some pointers on where to look in Squeak/Morphic for how fonts interact with Morphic. The maximum unicode character per here: https://jrgraphix.net/research/unicode_blocks.php is 16r00E007F So, I decided to see what Character would do if I dialed it up to 11 a bit... (16r00E007F + 16r000001) asCharacter What this tells me is that Character just has an integer and that the display of the character associated with that integer is "delegated" to something else (which makes sense). So, as I try to "duplicate" the displayed characters at https://jrgraphix.net/research/unicode_blocks.php with an appropriate Font (or "Font strategy...meaning, detect the font required and load it on the fly in a particular use-case) I figured I would ask for help in clarifying my presuppositions on how we get from 16r00E0041 asCharacter to 16r00E0042 asCharacter (get it? from A to B....heh). to expand a bit. I have characters that do show up in Chrome that do not show up in Squeak. I assume this only has to do with the Font not supporting that particular integer. Is this assumption correct? thanks in advance.

3 2

Testing mail server
by LawsonEnglish 30 Jan '21

30 Jan '21

I’m getting odd messages when I try to reply to a message from squeak dev so this is a pristine message L

2 1

Unloading EToys from Squeak Image
by Arjen van Elteren 30 Jan '21

30 Jan '21

All, I would like to unload the EToys packages from image. I tried with the Monticello Browser, unloading seems to proceed. But at the end nothing is reacting anymore. Any hint on how to successfully unload the EToys? Should I use a workspace in an MVC project? Kind regards, Arjen

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