Squeak-dev July 1998

squeak-dev@lists.squeakfoundation.org

80 participants
111 discussions

Re: a Squeak web browser
by Lex Spoon 29 Jul '98

29 Jul '98

Tim Rowledge writes: > On Tue 28 Jul, Mark Guzdial wrote: > > within Squeak. (Please don't ever implement frames! :-) > > > Surely frames would be easy to provide simply by inserting a new browser > window? Not much ugly about that is there? :-) > The problem with not having frame support is that lots of useful websites just > don't work without them anymore. Annoying, but true. Pragmatically, I agree, some frames support is important. At first, I'm just going to copy Lynx's really cheap frame support: put links to the sub-frames. I get a real kick out of visiting arrogant pages say "Your browser doesn't support frames. Use another browser", and then clicking on in. Eventually, frames in Scamper will probably look the same as however tables look. But it's not a real high priority for me personally. Incidentally, it's amazing what lynx can do with just an 80x25 screen of text; I had been using it lately to avoid downloading netscape, and actually have ended up not missing netscape at all. What many people consider to be the basics for a web browser, for instance the above implication that frames must be implemented and furthermore implemented in a certain way, really is overly specific. There's more to browsing the web than Netscape and Internet Explorer. Back to the matter at hand, frames philosophically ARE ugly. They talk about not only page layout, but window layout, in a language that is supposed to be about content description. Even worse than frames is Javascript, which talks about windowing *behavior*. Both frames and Javascript are encrustations which have developed and become popular simply because "everyone" uses web browsers that are so similar. Maybe the Squeak community can come up with a Web browsing system that's not so similar.... Lex

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a Squeak web browser
by Lex Spoon 28 Jul '98

28 Jul '98

Hi Squeakers, I've been working on putting together a Squeak web browser, and it's to the point now that you really can use it--it can handle links, lists, headers, and basic forms--enough to browse text-oriented pages and to do basic searches on Yahoo et al. Below is a little more detail as posted on our Swiki; I'm not sure what more to ramble about so will just leave it at that. Comments and ideas welcome! -Lex ================= http://minnow.cc.gatech.edu/squeak.14 =========== Scamper is a simple web browser which runs in Squeak. Currently it supports: titles, headers, paragraphs, emphasis, links, lists, some forms, most text emphases--the basics. Some things that don't work are: tables, frames, cookies, auto-reloading. Why use a Squeak browser instead of Netscape? Because of all that working in Squeak implies. The code and the objects are all there, accessible if you ever need to gt at them. A Squeak user in this system isn't limitted to just looking at rendered HTML pages, but can get directly at the underlying objects which structure them; they can move within the web, instead of just looking at it through glass. At least, that's the idea. The code is at http://www.cc.gatech.edu/~lex/squeak/www0.2/. It is under constant change still. The system is divided into the following main changesets: o Misc-URL - parsing absolute and relative URLs, and downloading Web documents through an abstract interface. Also includes a "MIMEObject" class which combines data with its content-type. o HTML - The biggest part. It includes three main subparts: 1. HtmlTokenizer - divides a text stream into a sequence of HTML tags, text (handling character reference entities) and comments. 2. HtmlParser - takes the results from the above and generates a tree of HTML entities which is more convenient to manipulate. 3. HtmlFormatter - takes the result of the above and generates a formatted Text object suitable for displaying. o Scamper - a simple Web browser. It currently only works in Morphic, but it wouldbe easy to have a display-only version in MVC. I don't see how to make forms work in MVC, though; not with near the ease as it can be done in Morphic. Ideas are welcome, though! The following supporting changesets are also needed: o protocolHacks - supports form requests over HTTP, plus some other small changes o governedPolling - slows the UI loop in Morphic (well, MVC, too). This is critical for the way Scamper is written, where pages are downloaded and rendered in a low-priority background thread. Without this, the background thread never executes. o DirectoryEntry - makes the directory entries returned by FileDirectories have their own class, instead of just being 5-element arrays. Mild Warning Some of the above code makes minor system changes to make things work. Well, at least I hope they're minor. Point is: don't use this in an image holding data you don't have backups of. Thoughts Dumb dee dooo...... Contributors Scamper was originally put together by Lex Spoon. David Pennell has been working on the HTML representation, and pointed out the existing Document Object Model described above. (feel free to jump in and explain this better!) Comments Hey, this is a Swiki after all. Any comments are quite welcome.

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Squeak2.1 under WinCE2.00
by Alejandro F. Reimondo 28 Jul '98

28 Jul '98

Folks, (abajo en castellano) I've refactored the WinCE port for Squeak2.1 acording to the new VM sources built by Andreas Raab for Win32 platforms. You can download them from http://www.sugarWeb.com/Miniatures/Files/WinCE/WceToday.htm This version is more stable and clean. Image can be shrinked more than actual image, but loosing functionality (like removing sound & network support). Cheers, Ale. Estimados, Reconstruí la última version de Squeak 2.1 para WindowsCE! Pueden visitar la pagina de SUGAR en maquinas pequeñas para ver mas detalles sobre esto. http://www.sugarWeb.com/Miniatures/Files/WceHoy.htm Saludos. Ale. Alejandro F. Reimondo Feel free to visit Smalltalk User Group of Argentina (SUGAR) at http://www.sugarWeb.com

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re: a Squeak web browser
by Craig Latta 28 Jul '98

28 Jul '98

Lex Spoon writes: > I'm not happy either with the way Scamper scedules its work, either. > Either you put it in a background thread, which means a busy UI can > slow or even stop it (try running a BouncingAtomsMorph while > downloading something!), or you put it in a normal-to-high priority > thread and the UI gets frozen when the thread actually starts working. > Either way someone loses. Event-driven input handling would help a lot... -C -- Craig Latta composer and computer scientist craig.latta(a)netjam.org www.netjam.org latta(a)interval.com Smalltalkers do: [:it | All with: Class, (And love: it)]

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Re: a Squeak web browser
by Bob Arning 28 Jul '98

28 Jul '98

Lex, Great start! Some thoughts for the future: 1. Enabling mailto: url's. The current version of my email client = supports the following: (Smalltalk includesKey: #EmailWindow) ifTrue: [ (Smalltalk at: #EmailWindow) beginNewMessageTo: 'joe(a)abc.com' ]. This, or something more user-configurable, would be an easy addition. I = have added support to the email client to invoke Scamper for the = display of links found in email. 2. Performance - I think there are still some gaps. I have found that = getting to the squeak swiki at Ga Tech sometimes is very slow even = though it seems that the data comes across the modem in a reasonable = time. I tried raising the priority of the Process doing the download to = #highIOPriority and that helped a lot until it failed to get the data = and got stuck in a "data was slow" loop. I am going to (for my own = edification) to try to understand the process scheduling mechanism and = perhaps that will shed some light on the matter. 3. Addition of more html types - while I understand, and in large = measure agree with, your bias towards text types, more will be needed = to make this a replacement for a regular browser. Images come to mind = immediately (though a user option in the matter would be nice). A = reasonable benchmark might be a site like www.apple.com which looks = nice and doesn't have a lot of bells and whistles - Scamper renders it = a bit too minimally. I'll let you know more as I spend more time with it. Cheers, Bob

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RE: WinCE2.0 port
by Alejandro F. Reimondo 26 Jul '98

26 Jul '98

Try http://www.sugarweb.com/Miniatures/Files/WinCE/ Ale. ---------- Desde: Serg Koren[SMTP:skoren@pop5.ibm.net] Enviado el: Sábado 25 de Julio de 1998 22:33 Para: alereimondo(a)sugarweb.com Asunto: WinCE2.0 port hi Ale, Have you fixed the broken links? They're still broken. Thanks, S ---------------------------------------------------------------------------- ------------------------- Serg Koren Principal VisualNewt Software, Makers of Newt'sPaper(tm): http://www.VisualNewt.com/ ICQ: 9079417 ---------------------------------------------------------------------------- ------------------------

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TextAttributes
by gr＠fuzzy.uba.ar 26 Jul '98

26 Jul '98

Hi everybody! (mas adelante en espanol, como la vez pasada) There is an update for TextAttributes (it has some new features and some bugfixes) it's available, as you may guess in http://www.sugarweb.com, I hope you like it. Hola! Hay una nueva version de los TextAttributes, (Tiene algunos agrgados y algunos bugfixes), se la pueden bajar de http://www.sugarweb.com. Espero que les guste. Bilingual Bye! Richie++

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ASCII code
by Alessandro Manunza 25 Jul '98

25 Jul '98

Hi Squeakers, I have some problems with the ASCII code of Squeak 2.0 Try a 'print it' of this: | file a| file _ StandardFileStream newFileNamed:'ascii.txt'. 1 to: 256 do:[ :i| file nextPut:(Character characterTable at: i)]. file close. file _ StandardFileStream fileNamed: 'ascii.txt'. file reset. a _ file contentsOfEntireFile. And after this,try to read the 'ascii.txt' file with BlockNotes(Win95). If you compare the content of BlockNotes to the content of a, you will find a big difference. WHY? How can I avoid this difference and all the consequent problems? Thanks for your help Alessandro

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Squeak in HP9000
by sgarcia＠ssax.com 25 Jul '98

25 Jul '98

Markus, I am using squeak in my HP9000. It is great.I am happy. Right now, I need the sources in C of virtual machine and the scripts to compiler and to link the source. Could you help me ? I am connecting from HP9000 server to a PC (window 95) throught TCP/IP. It is very easy with Squeak. The only problem is to make nice interface. (Windows) Thank you squeak(a)cs.uiuc.edu on 07/22/98 05:48:56 AM Please respond to markus_kohler(a)bbn.hp.com To: squeak(a)cs.uiuc.edu cc: (bcc: Sergio Garcia/AR/SSA_LATIN_AMERICA) Subject: Re: Unidentified subject! sgarcia(a)ssax.com wrote: > > Dears, > > I am Sergio Garcia Canto from Argentina. > I teach a introduction course about Object Oriented Programing in the > "La Matanza" university. > I want to run the Squeak on HP-9000 k220 server with the operating > system HP-UX B10.20. > Is it posible ? How ? > Could you help me ? It's possible. At least on my C-Class machine with HP-UX 10.20 it runs very well. As far as I can remember I had it running also on a K-Class machine sometime ago. It's available from ftp://st.cs.uiuc.edu/Smalltalk/Squeak/unix/distributions/hppa-hpux-10.2/ What's currently missing is the JITTER. Maybe I will give it a try soon, because I lately got egcs running on my machine. Markus -- Markus Kohler mailto:markus_kohler@hp.com

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Re: Closing a socket - Mac/2.1
by Bob Arning 25 Jul '98

25 Jul '98

On Fri, 24 Jul 1998 13:06:06 -0700 Maloney <johnm(a)wdi.disney.com> = wrote:=3D20 >From your discription, it sounds as though the server that Squeak is >talking to is not closing the connection properly. I don't know of any >bug in the Mac socket implementation that would cause this to happen. >(There was a recent bug related to socket closing in the Win32 >implementation, but it had different symptoms from those you describe.) Part of what I am wondering about is the following code from = sqMacNetwork.c: void TCPSockCloseConnection(TCPSockPtr s) { /* Note: This operation uses a dedicated parameter block so that it can be invoked even in the previous send is not yet complete. It will eventually use a completion routine to delete the socket automatically. For now, this is the client's responsibility. */ if ((s =3D3D=3D3D nil) || (s->tcpStream =3D3D=3D3D nil)) return; /* = socket destroyed */ InitTCPCmd(TCPClose, s->tcpStream, &s->closePB); // s->closePB.ioCompletion =3D3D tcpCloseDoneProc; s->connectStatus =3D3D ThisEndClosed; // xxx remove when making this = async s->lastError =3D3D PBControlSync((ParmBlkPtr) &s->closePB); } are those //'s some sort of comment? Does this accurately reflect the = 2.1 vm? > >What is the server? Is it implemented in Squeak? Whatever my ISP uses as a POP server. This is what appears when I = connect: +OK QPOP (version 2.5) at fellspt.charm.net starting. =3D20 > >It could be merely that you need a longer timeout in the call >to waitForDisconnectionUntil:. > I just raised the timeout to 60 seconds and it took 60 seconds to close = the connection (abort it actually). Cheers, Bob

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