June 2019 - Pharo-users - lists.pharo.org

Call for sponsors is open - Smalltalks Conference 2019

by Mariano Martinez Peck

Greetings all, I am contacting you on behalf of FAST organization [1] in case you may be interested in sponsoring Smalltalks Conference 2019 [2]. Here [3] is a brochure with some details about the conference, what we do and the importance of the sponsors [4]. We provide different categories to suite different possibilities. If you are interested or have questions please contact me and I can give you all the details about the categories or any further information you may want. We would also appreciate if you can help us pass the word about it [5] (either by mail, linkedin, forums, google groups, mailing lists, twitter, or whatever). Kind regards, PS: Sorry for the multiple copies you may get. [1] https://www.fast.org.ar/ [2] https://smalltalks2019.fast.org.ar/ [3] https://drive.google.com/open?id=1IFjFrWeW-tpJhIkENNJE5pPIytquaDzF [4] https://www.fast.org.ar/get-involved/sponsorship [5] https://twitter.com/fast_arg/status/1128015197636050945 -- Mariano Martinez Peck Email: marianopeck(a)gmail.com Twitter: @MartinezPeck LinkedIn: www.linkedin.com/in/mariano-martinez-peck <https://www.linkedin.com/in/mariano-mart%C3%ADnez-peck/> Blog: https://marianopeck.wordpress.com/

June 14, 2019

Re: [Pharo-users] Can I code a web browser in a Pharo GUI window (Morphic or other)?

by Noury Bouraqadi

Hi Arie, Do you really need to code web browser, or is it acceptable to control a web browser from Pharo. This is what we do in PharoJS (http://pharojs.org <http://pharojs.org/>), for running tests. We also have a custom playground, so evaluate pharo expressions that are translated to javascript and executed by the web browser. Noury > On 14 Jun 2019, at 09:45, Arie van Wingerden <xapwing(a)gmail.com> wrote: > > Hi, > > for a project I need this kind of program: > client side only > must be able to programmatically show a web browser in a window (Morphic??); only local content will be shown > must also be able to show other windows, containing simple games > Now, I guess that 1 and 3 are possible straight away, but I am unsure about option 2. > > I found out that there are a few ways to do it: > using C#, which has: > standard web browser control out-of-the-box > third-party open source chromium web browser component > using Java, which (afaict) is a coding effort, but possible anyway > > That saiud, since I'd very much like to start using Pharo for more tasks (just starting) I wonder if Pharo has something to offer in this case. > > Many thx! > /Arie >

June 14, 2019

Re: [Pharo-users] Can I code a web browser in a Pharo GUI window (Morphic or other)?

by Ben Coman

On Fri, 14 Jun 2019 at 15:46, Arie van Wingerden <xapwing(a)gmail.com> wrote: > Hi, > > for a project I need this kind of program: > > 1. client side only > 2. must be able to programmatically show a web browser in a window > (Morphic??); only local content will be shown > 3. must also be able to show other windows, containing simple games > > Now, I guess that 1 and 3 are possible straight away, but I am unsure > about option 2. > > I found out that there are a few ways to do it: > > - using C#, which has: > - standard web browser control out-of-the-box > - third-party open source chromium web browser component > - using Java, which (afaict) is a coding effort, but possible anyway > > > That said, since I'd very much like to start using Pharo for more tasks > (just starting) I wonder if Pharo has something to offer in this case. > The easier path is probably to connect to Chrome externally... http://forum.world.st/Chrome-DevTools-Protocol-and-Pharo-td4947589.html http://forum.world.st/Pharo-Chrome-was-Soup-bug-fix-td5020666.html http://forum.world.st/Web-scrapping-with-Pharo-Chrome-td5066882.html A heavier path is integrating Chromium via FFI. This is probably the most feasible path to a fully functioning browser. Many web browsers are a wrappers around Chromium, letting it do all the heavy lifting. https://en.wikipedia.org/wiki/Chromium_(web_browser)#Browsers_based_on_Chro… Pharo could do the same thing. Even Microsoft is doing this... https://www.theverge.com/2018/12/6/18128648/microsoft-edge-chrome-chromium-… I've previously linked a small sub-part of Chromium with Pharo. https://blog.openinworld.com/2017/11/pharo-pdf-part-1/ > In C# I can do this literally in a few hours, given the fact that ready made components exist. Depends on how you can balance your particular goals and time constraints, wrt the effort of getting a connection versus the effort of processing the data you get out of it. https://imgs.xkcd.com/comics/is_it_worth_the_time.png cheers -ben

June 14, 2019

Re: [Pharo-users] Can I code a web browser in a Pharo GUI window (Morphic or other)?

by Arie van Wingerden

Hi Richard, Op vr 14 jun. 2019 om 12:58 schreef Richard O'Keefe <raoknz(a)gmail.com>: > There was a thread about this two years ago. > http://forum.world.st/Smalltalk-Internet-Browser-td4944879.html > Mmmm. Sounds not like a ready to use solution at all. Given the fact that I am a Pharo n00b it wouldn't be an easy way to go I guess. There is Scamper for Squeak, https://github.com/HPI-SWA-Teaching/Scamper > It used to come standard in Squeak. When I knew it, it couldn't quite > handle HTML 3.2. I imagine it was removed from Squeak (and SqueakMap) > because it was quite impractical to keep up with the rapid changes in > the web. It would be cruel to say that some browser engineers never > saw a feature they didn't like; the truth often hurts. > Same "problem" here I guess? > There is already something called tODE, which apparently can make Pharo > tools visible in browser windows. That may be a better way to go. > This one? https://github.com/dalehenrich/tode/blob/master/repository/Tode-Client-Phar… And what do you mean with "Pharo tools" here? ... > We already have the tools needed to talk to WebKit; there is very > little benefit to the Pharo team from pouring vast resources into > duplicating what already exists. > Of course, I agree! Would you be so kind to point me to some docs about this? May I conclude that *maybe* "tODE" and "the tools needed to talk to WebKit" are the best ways to achieve my goal(s)? But, between the lines I read that it would be a rough way (for me at least), which would be a bit too rough for me as aa Pharo n00b. In C# I can do this literally in a few hours, given the fact that ready made components exist. So, maybe I'd better stick with that for this project and try my hands on a bit easier and smaller Pharo projects :-) Anyway, I really appreciate the help! Many thx! /Arie

June 14, 2019

Re: [Pharo-users] Can I code a web browser in a Pharo GUI window (Morphic or other)?

by Richard O'Keefe

There was a thread about this two years ago. http://forum.world.st/Smalltalk-Internet-Browser-td4944879.html There is Scamper for Squeak, https://github.com/HPI-SWA-Teaching/Scamper It used to come standard in Squeak. When I knew it, it couldn't quite handle HTML 3.2. I imagine it was removed from Squeak (and SqueakMap) because it was quite impractical to keep up with the rapid changes in the web. It would be cruel to say that some browser engineers never saw a feature they didn't like; the truth often hurts. There is already something called tODE, which apparently can make Pharo tools visible in browser windows. That may be a better way to go. ST/X went to the trouble of including its own Javascript and JVM implementations, but of course JS changes quite rapidly too and is no longer the little language it was when introduced. Heck, the ECMAScript specification is bigger than the source code listing of the mainframe operating system I used as an undergraduate. We already have the tools needed to talk to WebKit; there is very little benefit to the Pharo team from pouring vast resources into duplicating what already exists. On Fri, 14 Jun 2019 at 19:46, Arie van Wingerden <xapwing(a)gmail.com> wrote: > Hi, > > for a project I need this kind of program: > > 1. client side only > 2. must be able to programmatically show a web browser in a window > (Morphic??); only local content will be shown > 3. must also be able to show other windows, containing simple games > > Now, I guess that 1 and 3 are possible straight away, but I am unsure > about option 2. > > I found out that there are a few ways to do it: > > - using C#, which has: > - standard web browser control out-of-the-box > - third-party open source chromium web browser component > - using Java, which (afaict) is a coding effort, but possible anyway > > > That saiud, since I'd very much like to start using Pharo for more tasks > (just starting) I wonder if Pharo has something to offer in this case. > > Many thx! > /Arie > >

June 14, 2019

Re: [Pharo-users] TestCases and forked processes in TestResource don't play well

by Denis Kudriashov

Hi Eric ÑÑ, 13 Ð¸ÑÐ½. 2019 Ð³., 20:31 Erik Stel <erik.stel(a)gmail.com>: > Hi Denis, > > Thanks for the fast response. > > When you say proper fix, do you mean a general fix for all TestResources or > do you mean the fix for my situation? > I mean a general fix for test resources. > I can't oversee (yet) what the effect will be of halt/debug code inside the > web application (TestResource) which is the subject of the TestCase. > Normally this gets caught and handled specifically. And proper termination > of those forked processes from the TestResource will need to be handled > specifically (similar to the TestExecutionEnvironment :-) in the resource > #tearDown. Will try it out. > > Cheers, > Erik > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > >

June 14, 2019

Can I code a web browser in a Pharo GUI window (Morphic or other)?

by Arie van Wingerden

Hi, for a project I need this kind of program: 1. client side only 2. must be able to programmatically show a web browser in a window (Morphic??); only local content will be shown 3. must also be able to show other windows, containing simple games Now, I guess that 1 and 3 are possible straight away, but I am unsure about option 2. I found out that there are a few ways to do it: - using C#, which has: - standard web browser control out-of-the-box - third-party open source chromium web browser component - using Java, which (afaict) is a coding effort, but possible anyway That saiud, since I'd very much like to start using Pharo for more tasks (just starting) I wonder if Pharo has something to offer in this case. Many thx! /Arie

June 14, 2019

Re: [Pharo-users] TestCases and forked processes in TestResource don't play well

by Erik Stel

Hi Denis, Thanks for the fast response. When you say proper fix, do you mean a general fix for all TestResources or do you mean the fix for my situation? I can't oversee (yet) what the effect will be of halt/debug code inside the web application (TestResource) which is the subject of the TestCase. Normally this gets caught and handled specifically. And proper termination of those forked processes from the TestResource will need to be handled specifically (similar to the TestExecutionEnvironment :-) in the resource #tearDown. Will try it out. Cheers, Erik -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

June 13, 2019

Re: [Pharo-users] An IPFS interface for Pharo

by Konrad Hinsen

Marcus Denker <marcus.denker(a)inria.fr> writes: > Indeed. Another thing to try: if someone has a local IPFS running, would it cache > only those images that either this machine or near machines requested? Yes. But note that "nearby" is probably not what you expect, since IPFS connects more or less randomly to other peers in the network. It's neither geographically nearby nor nearby in the local network. All that can be configured. > This way we could have one âfullâ copy and caching (e.g. in the âAfrican class roomâ > example) would happen automatically. That might work. A safer approach is to have one server machine in the classroom on which the required files are pinned (IPFS jargon for "not removed during garbage collection"). Then configure the other machines nearby to "bootstrap" from that server. > Of course the downside is that one needs to speak the IPFS protocol, > thus either running a client (e.g the go client)â¦ so real transparent > use would only be possible if Pharo could implement the protocolâ¦ The generally recommended way to use IPFS on a desktop machine is what I do in my Pharo interface: connect via HTTP to go-ipfs running as a daemon process. Even the IPFS command-line client does that. The advantage is that you have only one data repository per machine, rather than one per process. For getting a Pharo image, you would then use the command-line interface, or implement IPFS access in Pharo launcher via the daemon (which should be straightforward, since it's really just an HTTP request). > There are many other ideas to explore (based on my partial knowledge)â¦ > more brainstorming than anything else: > > - Could we have an image formate that would be âblock friendlyâ? Probably. If some stable core is in one part of the image and the stuff that changes with each release in another part, then many block could be shared. Which IPFS does automatically. > - How could one move resources out of the image into IPFS? This is what I am currently experimenting with. My idea is to use IPFS as something like an extended image, mainly for data that I would also like to access from non-Pharo code. > - Content addressing (like it is done in Git, too) and Objects, how can it mix? > â Could one have âcontent pointersâ instead of âmemory pointersâ? It can certainly be done (just put all objects into a dictionary with the hash as the key), but memory efficiency and access time could be serious obstacles. This sounds more like a research project. Konrad.

June 13, 2019

Any Pharoer in Geneva?

by Hilaire

Hi, I will likely start a course on programming with Smalltalk through Dr.Geo and student text book I am writing [1]. Anyone in Geneva interested on Smalltalk teaching? Hilaire [1] https://launchpad.net/drgeo/trunk/19.06/+download/programmer-avec-drgeo.pdf -- Dr. Geo http://drgeo.eu

June 13, 2019