[opensource-dev] XUI Cleanup Project

Richard Nelson richard at lindenlab.com
Fri Aug 3 15:36:56 PDT 2012

There is already code to round-trip XUI files through the param block  
mechanism such that invalid attributes and default values are dropped and  
formatting is normalized.  That code hasn't been exercised in a few years,  
though, so it probably won't run correctly right away, but it does provide  
a mechanism for keeping XUI files in line with changing param block schema  
going forward.


On Fri, 03 Aug 2012 15:32:41 -0700, Kadah <kadah.coba at gmail.com> wrote:

> Hash: SHA1
> This weekend I was working on some XUI files and my OCD (I don't
> actually have OCD) was getting very frustrated over the random
> formatting, lack of consistent indentation, trailing whitespace,
> random/missing newlines and wildly differently sorted arguments.
> Usually I'd either completely retab the file or give up, but I was
> lazy and tired of not doing anything. So needless to say I got nothing
> done on in XUI and spent the few days writing a script to reformat XUI
> files to some level of code standards.
> There is no XML code standards on
> http://wiki.secondlife.com/wiki/Coding_standard
> So I used my own, which were as such:
> * Unix EOLs
> * Child elements indented +4 spaces
> * Each argument on onw line and indented +1
> * Arguments sorted by defined list then alpha order
>  (eg. 'name' and composting before random control specific args)
> * Comments must be preserved
> Initially I looked for existing tools/libs that can do XML cleanup,
> but I had the same results I found the last time I looked, that none
> of them could cover all the requirements. Surprisingly comment support
> was actually hardest to find support for, unsurprisingly argument
> sorting is extremely uncommon and the ones that did were poor.
> After that I attempted to find an XML lib for parsing, but found that
> pretty much all of them did not support comments or the tabled output
> was unstable.
> So I ended up writing the XML parser and reserializer myself.
> Everything appears to output correctly, but I lack a diff tool that
> supports XML to be able to do verification. The text diff tools I'm
> familiar with can only do word/character comparisons and the reordered
> args, and sometimes drastically improved whitespace, make manual
> checking tedious.
> So does anyone know of a, preferably, open source XML diff tool?
> I'm guessing it could be possible to extract some of the XML/XUI file
> parsing from the viewer and make one, but it would be a pain in the rear.
> If this works out, I'll release the scripts (MIT licensed), and submit
> the requisite jira/RB to push upstream XUI cleaned up, which would be
> really nice.
> Samples:
> Input:
> http://hg.secondlife.com/viewer-release/raw/24c6da14256c/indra/newview/skins/default/xui/en/panel_preferences_general.xml
> Output: http://pastebin.com/9K40N49w
> Input:
> http://hg.secondlife.com/viewer-release/raw/24c6da14256c/indra/newview/skins/default/xui/en/menu_login.xml
> Output: http://pastebin.com/i16De7xU
> - -Kadah
> Version: GnuPG v2.0.17 (MingW32)
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
> Iaj8ZaRB9HVfjdOiJJiT6aaTodEag0B23i19WH0fvq23kgZOGzXgiUppsw3TeiLr
> eTX0bnct/CqmTDx+afYJY9QExhb0osC8FuFzjxVld6KtQk46Wn6a58ljNvyc459e
> ySBCUgoivg+1oa5XqPP2UmUHE5OK0oqnhALKEfcLpW0AFpbv1yLzrJNEZYE3iIRn
> 3/g0mAhcpMtC6Um8XjR3+l/lTi50iTz2T5APnxWX8LNepwOvT2muffHgwGDGRwCt
> 6/e1SZjP9AI4hfVf4HM7Rn0JIc87Vp3zODf5KtCsw93er0Qmhi99OBZfn8DriXI=
> =GHbm
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