Squeak-dev May 2006

squeak-dev@lists.squeakfoundation.org

185 participants
370 discussions

Name spaces in Spoon
by Ralph Johnson 29 May '06

29 May '06

I'm just getting into Spoon (hmm, I'm just learning to use Spoon, I'm getting stirred up with Spoon, ... there ought to be a good line here) so I'm probably making some mistakes, but mailiing lists are good for finding that out. My guess is that Spoon doesn't implement the global variable Smalltalk. I'm going to assume that people know that the global variable Smalltalk is implemented as a dictionary (a SystemDictionary, actually) and that global variables are implemented as Associations. SystemDictionary needs to be nested. Each module should have its own "global variable Smalltalk", i.e. its own SystemDictionary that holds the names of all classes. The compiler looks up a name by looking in a dictionary, but a SystemDictionary will look in its parent if it doesn't have its own copy. This way, two modules can each have a class with the same name and the two classes won't collide. I recently read (probably in squeak-dev) a proposal to standardize the way people use prefixes to ensure that class names don't collide. It was something like Prefix::ClassName and the point was that only one or two places in the image had to change to legalize that kind of name. If "Prefix" was the module name, and if we ensured that module names were unique, and if importing a module caused all the classes in the module's local version of Smalltalk to be added to the root version of Smalltalk with this prefix added, then very little would have to change in the programming environment. -Ralph Johnson

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About Smacc
by Sebastien Aubry 29 May '06

29 May '06

Hello, I want to use SmaccParser with my Expert System. I want to parse a String of the form : (A&B)->C and/or A->C and/or ((A&B)|C)->D I created a suclass of SmaccParser and SmaccScanner but I don't know to utilise SmaCC. If you could help me to understand and use theses classes. Thanks for your request. Sébastien Aubry.

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Sources file for 3.9
by David Shaffer 29 May '06

29 May '06

I vaguely remember a discussion about changes which must be made to the squeak sources file in order for it to work properly under 3.9. Could some kind soul forward a pointer to instructions to me. I can't find it in the list nor after a brief look through SystemDictionary. The problem I'm having is that several characters in existing source code show up as "blocks" (rectangles) so I assume it is a character encoding problem. David

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REMINDER: Squeak Chat Tuesday May 30th 16:00 GMT
by Ken Causey 29 May '06

29 May '06

Just a reminder that the next Squeak Chat will take place between 16:00 (4 PM) and 20:00 (8 PM) GMT Tuesday May 30th, 2006. As usual we will meet in #squeak on irc.freenode.net. More information about the #squeak IRC channel can be found at http://people.squeakfoundation.org/article/7.html This is a good time to contribute to the development of Squeak by participating in the Harvesting Process. One of the main ways to contribute is by Reviewing submitted fixes and enhancements. For information about the Harvesting Process see http://minnow.cc.gatech.edu/squeak/3152 If you have the time please attend and work toward the future of Squeak. The next seven chats are scheduled for 20:00 (08:00 PM) GMT Saturday June 03, 2006 00:00 (12:00 AM) GMT Thursday June 08, 2006 04:00 (04:00 AM) GMT Monday June 12, 2006 08:00 (08:00 AM) GMT Friday June 16, 2006 12:00 (12:00 PM) GMT Tuesday June 20, 2006 16:00 (04:00 PM) GMT Saturday June 24, 2006 20:00 (08:00 PM) GMT Wednesday June 28, 2006

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True Type Instructions
by Noname Myname 29 May '06

29 May '06

On Tue, 16 May 2006 Boris Gaertner wrote : > >"Noname Myname" <gcdart_squeak(a)rediffmail.com> wrote: > > > > I believe that True Type Font Support in Already there in SQUEAK. >Yes, some support for True Type Fonts is available, but it is >still incomplete. > > > After seeing the Open Type specifications by microsoft and adobe , > > I think that to extended Support to Open Type fonts , is it just > > nessacary to extract the extra tables present in the Open Type > > font ( not CFF format ). >Right. However, the extraction of the more advanced tables >I find the specification for the tables GSUB, GPOS and GDEF quite >difficult to follow. For indian scripts, you will certainly need full >support for GSUB. In the "OpenTypeViewer" that you can >download from SqueakMap you will find incomplete support for >the GSUB table, but the subtables for contextual substitution >are not read - the application is still incomplete. > > > There was one Open Type font reader implemented, which > > failed to work on Indian Languages ( mangal.ttf , latha.ttf > > provided by microsoft ). Wat Xactly is the problem ? > > > More Over , Even if i extract all the tables how xacty > > shud i implement the script shaping ? > > that is wer shud i implement it ? >For several reasons this is the hard part of the exercise: >1. The Open Type Format is very flexible and allows for >a considerable difference in script shaping. You may not >assume that two different TTF fonts for, say, Devanagari, >will contain the same or similar glyph substitution rules. >2. For script shaping support, you will have to rewrite >most of the text formatting and display machinery. >For text formatting and display the following classes >cooperate (always with subclasses included): > Text, DisplayText, Paragraph, NewParagraph, >CharacterScanner, AbstractFont, TextStyle, TextLine, >TextLineInterval. > >3. I think that for script shaping you will have to implement >a structure that maintains both a string of stored codepoints >and a string that maintains the indices of the shaped glyphs >to display. The mapping between these two strings is not a >one-to-one mapping; due to script shaping several >codepoints may merge into one display glyph, a ligature. > > > Greetings, Boris > One more Question , shud the true type instructions in the Open Type files definitely be executed ? Or are they supported currently in SQUEAK ? Well if they are ... then wud'nt the display of characters be terribly slow ? Becuz you have to create an intrepreter inside another interpreter("SQUEAK") to understand the instructions and execute them. how does SQUEAK Handle the text display so efficiently or am i missing something very basic .... ?

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[ANN] A MathMorph book for 3.9b 7032
by Lic. Edgar J. De Cleene 29 May '06

29 May '06

Squeakers what like Math. Decompress and fileIn a fresh 3.9b 7032. Enjoy this autoloading morph. Soon I convert the others. Thanks to Milan for pointing to a 3.9 bug and to Serge for http://community.ofset.org/wiki/MathMorphs_Revival_Project

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Using Connectors
by Cowdery, Bob [UK] 29 May '06

29 May '06

Is there a way to attach a Connector to a morph embedded in a BorderedMorph or AlignmentMorph. I can only get them to attach to a morph embedded in a PasteUpMorph. Thanks Bob *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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Code coverage ?
by Squeak Smalltalk 29 May '06

29 May '06

Hi, I have some unit tests and I want to know if I test all my methods. Is there any squeak code for this ? B.R W.

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SqueakSource questions
by Keith Hodges 29 May '06

29 May '06

In the squeaksource wiki what is the best way of displaying source, particularly XML source. It says that XHTML tags are accepted, does this include the CDATA tag, could this be used, or can one disable XML markup temporarily. Is there a way to cross reference to other wikis in SqeakSource easily, or do you need to use http:// I am thinking of using this wiki extensively, as I learn about squeak I plan to document my findings there, if I feel there are any pages that contribute to documenting squeak then I will tag them *doc* , or is there an accepted protocol for doing this. Keith ___________________________________________________________ Try the all-new Yahoo! Mail. "The New Version is radically easier to use" The Wall Street Journal http://uk.docs.yahoo.com/nowyoucan.html

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Possible to create math-morphs-revival mailing list
by Milan Zimmermann 28 May '06

28 May '06

Ken, Is it possible to create a math-morphs-revival mailing list? I "remember" you are doing this stuff (thanks!) but was unable to find on squeak.org how to make this request properly.... Thanks Milan

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