Exhibit - Timeline How to display dates before/after 9999 BC/AD

[Shhh!!!]

Hello Everyone,

I am loading a Google spreadsheet into an Exhibit Timeline and it is
having problems displaying
dates past 9999 BC or AD. BC dates are listed in the spreadsheet as
negative (i.e. -1562), but
it can't once it reaches 10000 even though the timeline shows dates
farther down. Does anyone
have any experience with this problem? Thank you.


bzzzzzzzrp

[David Huynh]

Date/time is parsed by the code in this file

http://static.simile.mit.edu/ajax/api-2.0/scripts/date-time.js

There are a few regex in that file that you can override to get support
for 5 digit years.

<script>

SimileAjax.DateTime._dateRegexp = new RegExp(
"^(-?)([0-9]{5})(" + [
"(-?([0-9]{2})(-?([0-9]{2}))?)", // -month-dayOfMonth
"(-?([0-9]{3}))", // -dayOfYear
"(-?W([0-9]{2})(-?([1-7]))?)" // -Wweek-dayOfWeek
].join("|") + ")?$"
);

</script>

David

[Jon Crump]

Hi David,

If you're still here maybe you can offer some guidance on this question in the current context.

the timeline on this page will plot at date -9999-01-01, but not a date -10000-01-01 (both are in the spreadsheet that supplies the data)

If I try this in the console:

SimileAjax.DateTime.parseIso8601DateTime("-9999-01-01")
Sun Dec 31 -10000 23:59:02 GMT-0752 (Pacific Standard Time)

I see a valid date, but parsing "-10000-01-1" gives a valid date too, but it's nevertheless not plotted on the timeline:

SimileAjax.DateTime.parseIso8601DateTime("-10000-01-01")
Fri Dec 31 -10001 23:59:02 GMT-0752 (Pacific Standard Time)

I tried overriding the `_dateRegexp` as you suggested by doing this:

jQuery(document).on("registerComponents.exhibit", function(ev){

    SimileAjax.DateTime._dateRegexp = new RegExp(
        "^(-?)([0-9]{5})(" + [
            "(-?([0-9]{2})(-?([0-9]{2}))?)", // -month-dayOfMonth
            "(-?([0-9]{3}))",                // -dayOfYear
            "(-?W([0-9]{2})(-?([1-7]))?)"    // -Wweek-dayOfWeek
        ].join("|") + ")?$"
    );

});

the date regex appears to have been overridden:

SimileAjax.DateTime._dateRegexp
/^(-?)([0-9]{5})((-?([0-9]{2})(-?([0-9]{2}))?)|(-?([0-9]{3}))|(-?W([0-9]{2})(-?([1-7]))?))?$/

But the 5 digit date still isn't plotted on the timeline. but `parseIso8601DateTime` functions as I would expect:

SimileAjax.DateTime.parseIso8601DateTime("-9999-01-01")
null

but:

SimileAjax.DateTime.parseIso8601DateTime("-09999-01-01")
Sun Dec 31 -10000 23:59:02 GMT-0752 (Pacific Standard Time)
SimileAjax.DateTime.parseIso8601DateTime("-10000-01-01")
Fri Dec 31 -10001 23:59:02 GMT-0752 (Pacific Standard Time)

I also tried overriding with this regex:

_dateRegexp:/^(-?)([0-9]{1,6})((-?([0-9]{2})(-?([0-9]{2}))?)|(-?([0-9]{3}))|(-?W([0-9]{2})(-?([1-7]))?))?$/

and that too seemed to work as I would expect such that:

SimileAjax.DateTime.parseIso8601DateTime("-001000-01-01")
Tue Dec 31 -1001 23:59:02 GMT-0752 (Pacific Standard Time)
SimileAjax.DateTime.parseIso8601DateTime("-10000-01-01")
Fri Dec 31 -10001 23:59:02 GMT-0752 (Pacific Standard Time)
SimileAjax.DateTime.parseIso8601DateTime("-9999-01-01")
Sun Dec 31 -10000 23:59:02 GMT-0752 (Pacific Standard Time)

But the timeline resolutely refuses to plot any date before -9999

Can you, or anyone listening, give me some idea of what I'm missing?

best,

Jon

PS The page at http://neolography.com/staging/itinExhibitSketchIII.html is a test bed for solving a different set of problems. Please ignore the naive experiments and talking to myself in the comments.

[David Karger]

Hi Jon.  I'll try to take a look just as soon as the semester's teaching ends.

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