Re: [xsl] calendar generation

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

James,

This sounds like a fun problem.

To start, I'd simply determine how many days there were during the 
interval of interest, then iterate through a set of natural numbers 
(1 to the day count), using date arithmetic to add single days to the 
starting date. This would give me a sequence of date objects. (The 
methods you will need are all well-explained in Mike Kay's book.)

Here's something to get you started:

<xsl:variable name="start-date" select="xs:date('1776-01-01')"/>

<xsl:variable name="date-sequence" as="xs:date+">
  <xsl:sequence select="$start-date"/>
  <xsl:for-each select="1 to 365">
    <xsl:variable name="days"
       select="xs:dayTimeDuration(concat('P',.,'D'))"/>
    <xsl:sequence select="$start-date + $days"/>
  </xsl:for-each>
</xsl:variable>

<xsl:template match="/">
  <xsl:for-each select="$date-sequence">
    <xsl:value-of select="format-date(.,'[MNn] [D] [Y]')"/>
    <xsl:text>&#xA;</xsl:text>
  </xsl:for-each>
</xsl:template>

Notice in this case how 366 days are necessary to get all of 1776.

I'd then group them (groups starting with Sundays) into tabular form 
to make my calendar. The format-date function will be very useful for 
determining days of the week.

Cheers,
Wendell

At 11:35 AM 5/11/2010, you wrote:
> Hi there,
>
> I'm sure I'm treading over well-trodden ground, but my glance through
> the FAQ and googling doesn't turn up an easy XSLT2-based solution.
>
> What I want to do is for any given year (well, they will be between
> 1788 and 1837 in this case) generate a tabular calendar of months and
> days, with some of the days predictably being links to a resource for
> that date.  (Type: cal 1788  in any linux system to get an idea of
> what I mean.)   I have a list of what years/days/months the resource
> has content for in a format like:
>
> <year xml:id="g1789">
>     <month xml:id="g1789-01">
>        <day xml:id="g1789-01-01"/>
>        <day xml:id="g1789-01-02"/>
>        <day xml:id="g1789-01-03"/>
>        <day xml:id="g1789-01-04"/>
>        <day xml:id="g1789-01-05"/>
>        <day xml:id="g1789-01-06"/>
> etc.
>
> And I know I can lookup these ids to test whether there is a
> corresponding link in the resource.  That isn't really the problem.
> What I want to know is whether someone has already done the code to
> generate a year-view calendar in some sensible manner so I don't have
> to figure out the date calculation of any individual date? Obviously
> the intent of this is that it will be used for navigation on a
> date-oriented historical resource.
>
> Thanks for any suggestions!





======================================================================
Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
----------------------------------------------------------------------
  Mulberry Technologies: A Consultancy Specializing in SGML and XML
======================================================================