World: r4wp

Unknown word or style: tree
Unknown word or style: textarea

REBOL [Title: "rtext.r"]

view layout [treepane: tree contentpane: textarea] 400x400

found a reference...

hmm. How to display a tree of folders and files in REBOL???

There are some scripts that do that in the script library:
   www.rebol.org/search.r?find=tree

...bloated platforms include tree components by default...

For a complete package that has a tree view (rather than a separate 
component), try rebGUI:
   http://www.dobeash.com/RebGUI/widgets.html

A question: where can I find View syntax reference?
 : http://www.rebol.com/docs/docs.html
See the "Graphical Programming" section.

probe face  
;-)

I have a problem with Parse
The following string does not work
parse line [any [to mystring copy link to {<br />}]]
mystring is a variable
This works
parse line [any [to "http://mysite.com"copy link to {<br />}]]
Can't variables be used after TO ?

you'd have to use compose on mystring

it works with global variables.
maybe your variable is not visible to parse

>> mys: "ac"
== "ac"
>> parse " abacbac  ba" [any [to mys copy s to "b" (probe s)]]
ac
ac  
== false

How do I parse the same data with different ending ?
I could have
http://myfile.txt</BR>
http://myfile.txt</DIV>
I need something like 
PARSE mystring [copy link to [</ BR>|</ DIV>]

to
 doesn't accept block, so put "to" inside the block:

s1: {http://myfile.txt</br>}
s2: {http://myfile.txt</div>}
parse s1 [copy link [to </br> | to </div>] (print link)] ;works

parse s2 [copy link [to </br> | to </div>] (print link)] ;works too

I need something like the following
parse s1 [any [to "http://"copy link [to </br>|to </div>]]
Is it possible ?

Of course it is possible, if I understand if well what you want, 
is:

s1: "a http://xxx</div>b http://yyy</br>"

parse/all s1 [any [to "http://"copy link any [</br> break | </div> 
break | skip] (print link)]]

If you do want to leave out the </br> and </div> substrings, the 
simplest way probably is:

s1: "a http://xxx</div>b http://yyy</br>"

parse/all s1 [any [to "http://"start: any [end: </br> break | </div> 
break | skip] (print copy/part start end)]]

Also note that it is easy to replace the </br> or </div> subrule 
by a more complicated subrule

Thanks God ! ;-)

There is no documentaion about BREAK in PARSE (for R2), so it is 
always difficult to remember for me. Thanks Ladislav.

Guiseppe: if you didn't read this before, here is a very good article:
http://www.codeconscious.com/rebol/parse-tutorial.html
other articles are also great, take a look at them all.

In Ladislav's examples I am not ablie to understand the use of Break. 
Why it is useful ?

Also in the second example why there isn't a "end:" before "</div> 
break" ?

Also:

parse/all s1 [any [to "http://"copy link any [</br> break | </div> 
break | skip] (print link)]]
Could it be written as:

parse/all s1 [any [to "http://"copy link TO any [</br> break | </div> 
break | skip] (print link)]]
Or

parse/all s1 [any [to "http://"copy link any [TO </br> break |TO 
 </div> break | skip] (print link)]]

Finally, which is the purpose of the SKIP keywork in this context 
?

I use Artisteer to prototype web pages, and it saves content in UTF-8. 
Later on, I need to do few adaptations to such generated pages, so 
I opened it in R2, reparsed, inserted some stuff, deleted other, 
but it did not work out ....

What are my options, apart from doing it in R3?

Use some external tool to convert it to ANSI, do adaptations, and 
covert it back to UTF-8?

Why don't you want to do it in R3? That's the obvious solution

I am trying now. I somehow lost interest in R3, as it is non-finished, 
and dead product. But probably still easier than to use iconv together 
with R2, although I did it in the past that way, using CALL

One of the few advantages of R3 is processing Unicode. It fixed the 
Russian Syllable website

I am somehow not able to load one czech text properly ....

I mean - text I need to input into the resulting file (UTF-8) is 
ANSI. I do print to-string read %text-slider.html, and in R3 console, 
Czech text is not correct ....

I'll try with some other version than rather old view.exe

The console may be broken. How about the actual text, in an editor?

in editor, it's correct. Simply put - I read czech text from an ansi 
file, and it is distorted in console, ditto when writing it back 
to file of course ....

When you cut and paste it from the console, or when you write it 
with REBOL?

So you're saying the input file is not UTF-8?

Yes, ANSI. I solved it by re-saving the same source file as UTF-8 
istead of ANSI. Still a bad complication, as by default, Windows 
sets Notepad to ANSI, so it is a bit inconvenient ...

I am surprised R3 is not able to properly read/decode ANSI file with 
Czech alphabet ...

Guiseppe: "I am not ablie to understand the use of Break. Why it 
is useful ?"
I'll try to explain:

>> parse/all "http://a.txthttp://b.dat"[any [to "http://"copy 
x any [".txt" | ".dat" | skip] (print x)]]

http://a.txthttp://b.dat;it prints just one line, from the first 
http:// to the last .dat


>> parse/all "http://a.txthttp://b.dat"[any [to "http://"copy 
x any [".txt" break | ".dat" break | skip] (print x)]]

http://a.txt;now it works as expected, from http:// to .txt 
and breaks
http://b.dat;and from the next http:// to .dat

Guiseppe: "Could it be written as: ..."
TO ANY doesn't work.
but ANY [TO "..." BREAK | TO "..." BREAK] works.

just be careful using ANY and TO together, because they both don't 
advance the series pointer. So you can easily put the console in 
an infinit loop (escape key also doesn't work)

But still there is a problem in your example. Here I'll try to explain:


>> parse/all "http://a.txthttp://b.dat"[any [to "http://"copy 
x any [thru ".txt" (print 1) break | thru ".dat" (print 2) break 
| skip (print 3)] (print x)]]
1
http://a.txt
2
http://b.dat


it looks correct. but actually it depends on which one is first (.txt 
or .dat)

here is the problem:

>> parse/all "http://a.txthttp://b.dat"[any [to "http://"copy 
x [thru ".dat" (print 1) | thru ".txt" (print 2) | skip (print 3)] 
(print x)]]
1
http://a.txthttp://b.dat

hmm.. links look weird in AltME, select all text, copy and paste 
to a text editor to see it correctly.

Petr, R3 can't decode any 8bit encodings with its built-in code, 
just ASCII (which is 7bit) and UTF-8. However, its binary handling 
is better so it should be easy to write your own converters. For 
R2, I would suggest looking at Gabriele's PowerMezz package; it has 
some great text converters. Of course you lose out on R3's PARSE 
if you use R2.

Pekr, look for Oldes' UTF8 package for Rebol 2, I believe it's on 
rebol.org, it can convert anything (it supports downloading code 
pages from net) to/from UTF8, I really saved me lot of time when 
I was working on translations for Windows Vista.

Rebolek - thanks, I forgot about it. I needed it only once in the 
past, and so I used iconv command line tool  via CALL ....

Recently I switched to R3, as I don't need the gui, just a script 
to do some webpage source code post-processing ....

End I have tried. Exchanging the position of .txt and .dat I have 
only a single line. How it could be solved ?

Also, which is the purpose of the SKIP as third option ?

Also in Ladislav's example why there is only one END ?

On my mac the script I made on windows using a couple of international 
characters the chars are also displayed wrong. "Nederlands" "English" 
"Deutsch" "Français"

 "Español" "Italiano" "Português". When I saved as UTF-8 I hoped my 
 problems would have resolved, but then REBOL complained my script 
 had no REBOL header. :-(