[REBOL] Re: XML Dialect
From: brett:codeconscious at: 25-Apr-2002 23:06
Hi Andrew,
> > Here's my first try at an XML dialect for Rebol.
>
> And here's my second try. It does HTML as well, and is smaller. Plus it
> incorporates the SVG MIME correction from Adobe's FAQ.
>
> Comments and suggestions gratefully appreciated.
It is interesting. I was playing around with Topic Maps (confusing
things they are too) some months back and I was using Gavin's great xml
parser. The thing is I had come up with a dialect *very* similar to
yours - actually identical in relation to using paths to encode
attributes. I was looking for a nice way to encode xml as rebol values
and to try to capture as much of the xml as possible.
The difference between what I did and what you have done is that yours
produces xml and mine reads it in! Nice fit :^) However, there is one
other difference I actually always produce a block for the content of
an element whereas your dialect is a bit smarter. Perhaps with a small
change they can work together.
Here's the result of my script when applied to your test.html (I've
manually added new lines and indentation to make it easier to read).
[
html [
head [ title ["Test"] ]
body
[
h1 [ "Test" ]
p/class [ "Test paragraphs" ] "Initial"
p [ {Now is the time for all good men to come to the aid of the
party.} ]
hr [ none ]
embed/src/name/type/pluginspage [none]
"Test.svg" "Test" "image/svg+xml"
http://www.adobe.com/svg/viewer/install/
]
]
]
It doesn't produce anything for test.svg - haven't looked into why yet.
See below for the script.
Regards,
Brett.
[
REBOL [
Title: "XML dialect experiement"
File: %xml-to-functions.r
Author: "Brett Handley"
Date: 29-Dec-2001
]
do %xml-parse.r
xml-to-functions: make xml-parse/xml-parse-handler [
_spop: function [a-stack] [a-val] [
if 0 < length? a-stack [
a-val: last a-stack
remove back tail a-stack
a-val
]
]
_spush: func [a-stack val] [
append/only a-stack val
]
_stack: none
start-document: func [
] [
_stack: copy []
_script: copy [
]
]
xml-decl: func [
version-info [string! none!]
encoding [string! none!]
standalone [string! none!]
] [
]
document-type: func [
document-type [string!]
public-id [string! none!]
system-id [string! none!]
internal-subset [string! none!]
] [
]
start-element: func [
ns-uri [string! none!]
local-name [string! none!]
q-name [string!]
attr-list [block!]
] [
_spush _stack _script
append _script reduce compose [
to-path head insert map :to-word extract attr-list 2 to-word
local-name
_script: copy [
]
(extract next attr-list 2)
]
]
end-element: func [
ns-uri [string! none!]
local-name [string! none!]
q-name [string!]
] [
_script: _spop _stack
]
characters: func [
characters [string! none!]
] [
if any [
none? characters
all [characters not empty? trim copy characters]
] [
append/only _script characters
]
]
pi: func [
pi-target [string! none!]
pi [string! none!]
] [
]
comment: func [
comment [string! none!]
] [
]
end-document: func [] [
]
start-prefix-mapping: func [
ns-prefix-uri-pairs [block!]
] [
]
end-prefix-mapping: func [
ns-prefix-uri-pairs [block!]
] [
]
get-parse-result: does [
_script
]
]
xml-parse/parser/handler: xml-to-functions
r: parse-xml+ read %test.html
probe r: parse-xml+ read %test.svg
halt
]
