Squeak-dev November 2001

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174 participants
374 discussions

[ENH]: added configuration possibilities to MorphicWrapper
by ducasse 28 Nov '01

28 Nov '01

Hi I added some configuration to MorphicWrapper. Execute MorphicWrapperConfiguration changeToGetANiceStyle Then I have the impression that there is bug in the position of the string inside a balloon. you can see that with morphicWrapper because the text is dynamic. While typing the base line of the text changes slightly depending on the lentgh of the text. Have fun Morphic Wrapper are cool.

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[ENH] Transform the architecture of the file list to support regsitration
by ducasse 28 Nov '01

28 Nov '01

Hi I had lot of fun cleaning the file list so that we we do a major shrink we do not have tons of obsolete class reference. The idea is that every tools should register to the file list that will then use this information to dynamically propose action. I hope this could be integrated into the image even if there is a lot of small changes. This is this kind of architecture that can help Squeaqk to be modular and clean. Stef Here is a part of the preamble Author: Henrik Gedenryd, Gerald Leeb and Stephane Ducasse Version 3.0 - 16 Nov 2001 Prerequisites: HookForRemoveFromSystem.cs version 1. SUnit any version This changeset introduces an important architectural change in the design of the FileList. The FileList now proposes a registration mechanism to which any tools the filelist use ***MUST*** register. This way it is possible to load dynamically a new tool or unload and to have the FileList automatically updated. This change supports a decomposition of Squeak and removes problem with dead reference to classes after a major shrink. Tools should implement the method fileReaderServicesForSuffix: suffix (look for sender in the image) and register to the FileList calling the class method registerFileReader: aProvider when they load in. There is a testSuite called FileListTest that presents some example. A tool register by providing a SimpleEntryService. It is composed by a class, a menu label and a method selector having one argument. See example below. The convention right now is that the argument is the path of the selected file when one file is selected and the fileList itself when no file is selected. It seems an arbitrary choice but this is the one that avoid to declare method with explicit reference to file list in reader. Hence decouple the most the reader and the file list. Note that this regsitration mechanism relies on the fact that the file list is on the image. In the future we may introduce another object that we know will be always in the image. To do list: look for - self flag: #shouldBeChangedToReflectThatToolsCanBeRemoved. - self flag: #ViolateNonReferenceToOtherClasses. stef History: Stef 10 November 2001. - documented an edited the preamble + class comment. - Added the possibility to unregister a tool, to check if a given tool was registered. This help to build default menu. - remove a bug with browseFile. Now we can also selectAndBrowse file when no file are selected in a way enforced by the registration mechanism. - Remove one possible bug the class variable was lazzily accessed from the class side but there was an instance methods returned it directly. This would have returned nil instead of an empty collection. - renamed some methods to use the same vocabulary - fixed genie registration. Now genie uses the registration mechanism too. - fixed zipArchive registration - fixed alice registration - removing a class form the image also unregisters the tools for that purpose I introduced a hook method in the Class>>removeFromSystem: that per default does nothing. But using this hook instead of specializing removeFromSystem: does not let the responsibility to the class developer to call super removeFromSystem: To do: Check all the code and add some flag: method to indicate future work to do. check for example flag: #ViolateNonReferenceToOtherClasses and shouldBeChangedToReflectThatToolsCanBeRemoved - For example, some classes like ServerDirectory are still directly referenced via menu action. They could be the target of another iteration. Example: The method FileList>>itemsForFileEnding: retrieves the menu entries via ReaderServices. Each class can register itself as ReaderService with: FileList registerFileReader: self. The FileList collects the service entries for a file suffix by the message #fileReaderServicesForSuffix: of each ReaderService. Example: FlashMorphReader>>fileReaderServicesForSuffix: suffix ^(suffix = 'swf') | (suffix = '*') ifTrue: [ {SimpleServiceEntry provider: self label: 'open as Flash' selector: #openAsFlash:}] ifFalse: [#()]

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Re: [BUG] file Truncate is it really busted?
by Richard A. O'Keefe 28 Nov '01

28 Nov '01

"David T. Lewis" <lewis(a)mail.msen.com> wrote: p.s. "ftruncate()" is certainly a misleading name. All of the other "fwhatever()" calls expect to use a FILE structure. That's about as far from true as you can get. There is a naming convention in UNIX system calls that snarkle(...char*...) operates on a file object, given a pathname for it, while fsnarkle(...int...) operates on a file object, given a file descriptor for a connection to it. Examples: acl() -vs- facl() chdir() -vs- fchdir() chmod() -vs- fchmod() chown() -vs- fchown() chroot() -vs- fchroot() pathconf() -vs- fpathconf() stat() -vs- fstat() statvfs() -vs- fstatvfs() truncate() -vs- ftruncate() There are also several functions which take a file descriptor argument and have no analogue with a path-name, such as flock(), fsync(), and fdatasync(), not to mention fcntl(), which no long-time Unix hacker could ever forget. There is also a stdio naming convention that analogues of system calls such as snurkle(...int...) which take a FILE* instead of a file descriptor add an "f" prefix fsnurkle(...FILE*...) giving the series close() -vs- fclose() open() -vs- fopen() read() -vs- fread() lseek() -vs- fseek() [lseek() replaced an older seek()] write() -vs- fwrite() The "f" prefix is also generalised to functions which have no system call analogue. It is indeed unfortunate that the same prefix is used for both purposes; blame it on UNIX having originally had a limit of 7 significant characters in external C identifiers (8 for assembler, but C stuck '_' in front). It would make sense to have an fftruncate() function (truncate + f prefix to get file descriptor + f prefix to get FILE*), but there is none.

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AlignmentMorph?
by merlyn＠stonehenge.com 28 Nov '01

28 Nov '01

I'm seeing new changesets go into the core that use AlignmentMorph. Why? I thought we were deprecating that class. Or does AlignmentMorph still do something that Morph doesn't? I'm confused. -- Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095 <merlyn(a)stonehenge.com> <URL:http://www.stonehenge.com/merlyn/> Perl/Unix/security consulting, Technical writing, Comedy, etc. etc. See PerlTraining.Stonehenge.com for onsite and open-enrollment Perl training!

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JPEG Win32 plugin
by Bruce ONeel 28 Nov '01

28 Nov '01

... is on the FTP site in Squeak/3.2alpha. cheers bruce

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Re: [updates] 10 for 3.2a
by Bruce ONeel 27 Nov '01

27 Nov '01

Hi, This is up on the FTP site now. Not VMs or plugins, just the .zip. cheers bruce Dan Ingalls <Dan(a)SqueakLand.org> wrote: > Folks - > > Now out on the servers, some pretty interesting goodies... > > First, in time for the holidays, we have two classic games. Mines from David A. Smith is ready to gobble up your spare minutes and hours. And an entire game of Chess, from Andreas Raab, which he says needs a bit more programming to play a decent game. Who wants a Squeak game that needs more programming? Oh, I see ;-). > > There are several bug fixes, plus a whole rewrite of Morphic borders from Andreas. Lots of cool new styles are now available. > > Then there's a high-speed reader/writer for JPEG format from Juan Manuel Vuletich. And streaming sound support from John Maloney. > > Last, but not least: An entire JPEG movie morph from John Maloney and Juan Manuel Vuletich. You mean MPEG, don't you? No! Juan's JPEG plugin is so fast that you can show movies from it at 30-40 frames per second. This means we have a movie format that is open, can be written from Squeak, and is something like 20 times more compact than our old .movie format. > > Check them out > > - Dan > -------------------- > 4543hideTabsFix-sw -- Scott Wallace -- 24 November 2001 > Fixes the bug that could drop you into an endless series of debuggers if you hit the 'hide tabs' button in a flap-based Navigator tab" > > 4544Morphic-Chess-ar -- Andreas Raab -- 25 November 2001 > A long-term project of mine has always been to write a nice little chess program for Squeak. But since I haven't done anything on it in the last few months I'm just going to throw it at the community to see if someone is interested in doing a bit more. > It's a playing ... but not well :-( So, go get it from the objects tool and improve it!" > Smalltalk at: #ChessConstants put: Dictionary new. > > 4545Mines-das -- David A. Smith -- 25 November 2001 > Ah ... one of those terribly addicting games..." > > 4546projEnter-sw -- Scott Wallace -- 25 November 2001 > Fixes a recently-introduced bug regarding the initial state of morphic projects." > > 4547viewBoxFix-crl -- Craig Latta -- 5 November 2001 > Initialize the fullBounds of a pasteup when its viewBox is set -- fixes a bug seen when entering a newborn project that has no submorphs in it. " > > 4548BorderStyles-ar -- Andreas Raab -- 26 November 2001 > This change set introduces explicit border styles in Morphic. At this point they are hacked into BorderedMorph to allow the dual existance of the borderWidth/borderColor pair with the new border styles (e.g., storing a value into borderWidth/borderColor will be reflected in the borderStyle when it is used). > Six new complex border styles have been added - besides 'rounded' versions of inset and raised borders (as well as their inverse variants) framed borders are supported. The new border styles are available from the object properties dialog (e.g., when you click on the 'change color' halo - which really should be renamed). > In addition, each border style can either track the color from its associated morph, or it can have a fixed color. It is therefore now possible to have a morph with a gradient fill and a manually selected color with a raised (or inset, or framed) border style, thus greatly improving the results for any fancy fill styles. > > 4549fastJPEGReadWriter-jmv -- Juan Manuel Vuletich -- 26 November 2001 > JPEGReadWriter2 uses a free JPEG library from the Independent > JPEG Group to provide: > 1. encoding, as well as decoding of JPEG images > 2. very good performance > It has many applications, including JPEG movies. Many thanks > to Juan Manual for this splendid addition to the Squeak toolbox!" > > 4550streamingSound-jm -- John Maloney -- 26 November 2001 > Adds support for the creation and playback of monophonic > streaming sampled sounds. The sounds can be compressed > using any of Squeak's sound codecs. Random access > (i.e. moving the playback position) is supported. Compatible > with StreamingMP3Sound. > Note: Random access does not work perfectly with the ADPCM > codec. A fix is forthcoming. For now, mulaw or gsm compression > are recommended." > > 4551jpegMovie-jm -- John Maloney -- 26 November 2001 > Exploits the new fast JPEG plugin to support a new, compressed > movie format: JPEG movies. A JPEG movie file (usually ending > in '.jmv') contains a header, the JPEG compressed frames of the > movie, and possibly one or more sound tracks. Like a Squeak > movie--and unlike an MPEG movie--JPEG movies can be created, > manipulated, and edited using only Squeak. However, they are > much, much smaller than Squeak movies. For example, a > several minute clip from Fantasia ('Night on Bald Mountain') > shrunk from about 176 to under 6 megabytes. On the other hand, > JPEG movies tend to be 1.5 to 3.0 times the size of an MPEG movie > at a similar quality level. > The class JPEGMovieFile contains methods for converting both > MPEG or Squeak movies into JPEG movies. JPEGMovieFile implements > a subset of the MPEGFile protocol so that JPEG movies can be > played by MPEGMoviePlayerMorph. > Also included in this changeset: > 1. the ability to resize the movie display (use the yellow halo) > 2. improved sound/picture sync that is robust in the face of > sound pauses induced by OS activities > > 4552borderStylesInViewer-sw -- Scott Wallace -- 26 November 2001 > Makes the full range of new border styles available in viewers"

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Re: [ENH] ??? MD5 in Squeak.
by Mike Rutenberg 27 Nov '01

27 Nov '01

"Duane Maxwell" <dmaxwell(a)san.rr.com> wrote: > One reason I believe it has not made it into the image is that a request was > made by SqC a few months back to try and refactor SHA and MD5 functionality > to take advantage of their similarities, but neither I nor anyone else found > the time to do so. I agree that it should probably be part of the image. The "integration issue" that I heard of (while talking with John and Stephan) was to take advantage of John's SHA/DSA plugin speed and avoid having an additional MD5 plugin. The DSA plugin was then replaced by the general purpose LargeInteger plugin, eliminating the need for special purpose plugins for either SHA or MD5. As far as I know, there are no outstanding integration issues. Mike

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[ENH] hook method for removeFromSystem:
by Stephane Ducasse 27 Nov '01

27 Nov '01

This changeset (two methods) introduces a hook method when removing a class from the system. The hook method is called lastActionBeforeRemoveFromSystem. The point of introducing it is that without it developer of classes which needs to performed some actions before been removed from the system have to specialize removeFromSystem: on their class and not forget to call the overriden method using a super removeFromSystem:. This hook frees the developer from this responsibility and makes then the system safer. We will need that when unloading classes or modules. lastActionBeforeRemoveFromSystem "This hook lets a class performs a last action before being removed from the system whitout letting the responsibility to the developer to invoke super removeFromSystem: which is the case when we specialize directly removeFromSystem: sd-15Nov01" "Do nothing"! ! !Class methodsFor: 'initialize-release' stamp: 'SD 11/15/2001 22:19'! removeFromSystem: logged "Forget the receiver from the Smalltalk global dictionary. Any existing instances will refer to an obsolete version of the receiver." self lastActionBeforeRemoveFromSystem. self superclass ifNotNil:[ "If we have no superclass there's nothing to be remembered" self superclass addObsoleteSubclass: self]. self environment removeClassFromSystem: self logged: logged. self obsolete! !

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Images, change sets and projects
by Leo Burd 27 Nov '01

27 Nov '01

Folks, Where can I find a good, introductory description of what people mean by Squeak images, change sets and projects? Best, Leo

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Re: Celeste scaring me...
by Mike Rutenberg 26 Nov '01

26 Nov '01

You did exactly the right thing. Whenever mail is created (received or written) it is written immediatelyt to the messages file. At that point the image can crash, but the mail safely there. If you restart your image after the crash, it will likely not know about the last few messages. Salvage will find them by looking though the whole messages file. Those that it does not have a category for it will put in .unclassified. (After salvaging, it probably makes sense to have feedback appear if .unclassified. now has message, so that people know where to look for what they thought they had lost. I will do that shortly along with some other celeste tweaks). Mike

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