XFDL Viewer – Good and Bad.

I used to think of myself as a decent coder, but this XFDL project is a monster.  Particularly with the parsing schemes.  Let alone the May 15th suspense on the project!!  Oh well, if it doesn’t get done, I’m still working on it…  So I broke apart the XML and just to give a taste of the parsing for this, here’s my notes:

Mind you, I’m skipping the globals but here what needs to be parsed from there:

  • Title
  • Version
  • Fontinfo
  • Bgcolor
  • Print Settings
  • Bindings

This first block is the “field” form.  This is the main part to parse because this is where all values except checks and signatures will go.

<field sid="TO"> --> sid == div id
	<itemlocation>
		<ae>
			<ae>absolute</ae> -- style='position:absolute'
			<ae>y</ae>
			<ae>x</ae>
		</ae>
		<ae>
			<ae>extent</ae> -- dimensions
			<ae>l</ae>
			<ae>w</ae>
		</ae>
		<value>THIS IS WHAT NEEDS EDITTING!</value> - input, no border
		<broderwidth>0</broderwidth> --> style
		<fontinfo> --> style
			<ae>type</ae>
			<ae>size</ae>
			<ae>attribute</ae>
		</fontinfo>
		<justify>center</justify> --> style
		<scrollhoriz>wordwrap</scrollhoriz>
		<scrollvert>fixed</scrollvert>
		<next>TO</next> -> form taborder
		<previous>DATE_A</previous> -> form taborder
		<acclabel>lorum ipsum</acclabel>
		<format>
			<ae>string</ae> --> set form input type
			<ae>optional</ae> --> validation check
			<length>
				<ae>0</ae> vert
				<ae>18</ae> horiz
			</length>
		</format>
	</itemlocation>
</field>

Next part, check boxes.  Nothing too scary here.  Much the same as above.

<check sid=""> same
	<itemlocation></itemlocation> same
	<value>on|off</value>
	<fontinfo></fontinfo> same
	<next></next> same
	<previous></previous> same
	<acclabel></acclabel> same
</check>

Here we get complicated.  Nothing bad about the labels, except there form uses labels for definitions at the end and you’ll see it later where it is reused for a new purpose.  This could pose a good challenge!

<label sid=""> same
	<itemlocation></itemlocation> same
	<value>TEXT</value>
	<linespacing>1</linespacing> OPITONAL
	<fontinfo></fontinfo> same
	<fontcolor>black</fontcolor>
	<format></format> same
</label>

Lines, not too bad… will just be a simple parsing the xml to putting them on the page.

<line sid=""> same
	<itemlocation></itemlocation>same
</line>

Buttons!  These would be easy but they will associate with signatures.

<button sid=""> same
	<itemlocation></itemlocation> same
	<value compute="">FROM CERT</value>
	<type>signature|</type>
	<vfd_signmode>custom</vfd_signmode>
	<printvisible compute="">on|off</printvisible>
	<signformat>???WTF???</signformat>
	<signature>FOR BINDINGS</signature>
	<signer>FROM CERT</signer>
	<custom:onClick>function</custom:onClick>
	<signoptions>
		<ae>omit</ae>
		<ae>triggeritem</ae>
		<ae>coordinates</ae>
		<ae>ufv_settings</ae>
	</signoptions>
	<vfd_group>??</vfd_group>
	<format></format> same
	<previous></previous> same
	<next></next> same
	<image>FROM CERT?</image>
	<signatureimage>FROM CERT?</signatureimage>
	<signitemrefs>
		<ae>LOCK BINDS</ae> -- USE FOR VALIDATION
	</signitemrefs>
</button>

Not even touching signatures until I get the parsing scheme in place!

<signature>
	WILL DO LATER
</signature>

Data will be easy enough, just needs to be decoded and displayed.  Whew… may need to save the files to the server to display but I think HTML can handle an image from data.

<data sid=""> relates to signatures & images
	<filename></filename> -- image (optional)
	<mimedata encoding="base64-gzip"></mimedata>
</data>

Do I really need the toolbar if I’m not using it’s functions?

<toolbar sid="TOOLBAR">
	<bgcolor>
		<ae>gray60</ae>
	</bgcolor>
</toolbar>

Is IBM so dense they can’t find a new name for the toolbar tags instead of reusing label?

<label sid="TOP">
	<itemlocation>
		<ae>
			<ae>within</ae>
			<ae>TOOLBAR</ae>
		</ae>
		<ae>
			<ae>absolute</ae>
			<ae>0</ae>
			<ae>0</ae>
		</ae>
	</itemlocation>
	<image>PAGE1.ArmyLogoTop</image>
	<imagemode>clip</imagemode> -- style
	<active>off</active>
</label>

I won’t complain about this one!  Seems pretty simple, just like lines…

<spacer sid=""> same
	<itemlocation></itemlocation> same
</spacer>

So keep watching the blog… I’ll post more when I figure out how to handle all this data.  And this all needs to be cycled per page to output to the browser… yuck.

One thought on “XFDL Viewer – Good and Bad.”

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