[LON-CAPA-dev] Plot Response and HTML5

[Stuart Raeburn]

Hi,

> Is there a way to stick a version check on Safari?
> (I guess the same thing would happen with a too-old chrome as well, though I
> don't know where that threshold is).

The following changes incorporate more comprehensive browser detection  
in functionplotresponse, based on the user agent string provided by  
the browser when a user logs into LON-CAPA. Following authentication,  
the user agent string is decoded and stored in a number of browser.*  
items in %env.

homework/functionplotresponse.pm rev. 1.103
loncom/interface/loncommon.pm rev. 1.1141
loncom/loncapa_apache.conf rev. 1.225


- More comprehensive checking for HTML5 support for Geogebra , based on
   decoding of user agent at log-in.
   - HTML5 used for:
     Chrome: version 14 or later
     Safari: version 536 or later (version 8536 for mobile safari).
     Firefox: version required dependent on os (Windows - 14 or later;  
Mac - 20 or later; Linux - 17 or later).
     IE: version 10 or later

One currently untested scenario, is whether IE9 with Google's Chrome  
Frame plug-in installed will support the GWT-based HTML5 Geogebra  
implementation. In my tests neither standard IE9, nor IE8 with the  
Chrome Frame plugin supported HTML5 Geogebra.  The current logic in  
useHTML5() returns 0 for IE9.

For the future it would be useful to know what set of HTML5  
capabilities GeoGegraWeb requires, so that specific tests could be  
made for the required functionality, in place of the current reliance  
on the user agent string, e.g., see: http://html5test.com/


Stuart Raeburn
LON-CAPA Academic Consortium


Quoting Mark Lucas <lucasm at ohio.edu>:

> I'm stuck in the dark ages.
>
> The chrome download worked.
>
> When I downloaded using safari, the image came up but nothing else happened.
> I'm still running snow leopard, which means I'm stuck back on Safari 5.1.9.
>
> Is there a way to stick a version check on Safari?
> (I guess the same thing would happen with a too-old chrome as well, though I
> don't know where that threshold is).
>
> Later,
> Mark
>
>
> On Jun 19, 2013, at 1:57 PM, Gerd Kortemeyer wrote:
>
>> Hi,
>>
>> On Jun 19, 2013, at 11:31 AM, Mark Lucas <lucasm at ohio.edu> wrote:
>>
>>> How does LON-CAPA check for the functionality and decide which to deliver?
>>>
>>> Is there a particular function that is tested?
>>
>> No, we had to test each browser. Here's the function that decides:
>>
>> www		Fri Aug 17 18:02:16 2012 EDT
>>
>> Modified files:
>>   /loncom/homework	functionplotresponse.pm
>> Log:
>> HTML5 compatibility
>>
>>
>> Index: loncom/homework/functionplotresponse.pm
>> diff -u loncom/homework/functionplotresponse.pm:1.98   
>> loncom/homework/functionplotresponse.pm:1.99
>> --- loncom/homework/functionplotresponse.pm:1.98	Fri Aug 17 13:08:11 2012
>> +++ loncom/homework/functionplotresponse.pm	Fri Aug 17 18:02:15 2012
>> @@ -1,7 +1,7 @@
>> # LearningOnline Network with CAPA
>> # Functionplot responses
>> #
>> -# $Id: functionplotresponse.pm,v 1.98 2012/08/17 13:08:11 www Exp $
>> +# $Id: functionplotresponse.pm,v 1.99 2012/08/17 18:02:15 www Exp $
>> #
>> # Copyright Michigan State University Board of Trustees
>> #
>> @@ -49,7 +49,10 @@
>> # Return a true value if HTML5 should be used.
>>
>> sub useHTML5 {
>> -    return 1;
>> +    if  ($env{'browser.type'} eq 'chrome') { return 1; }
>> +    if (($env{'browser.type'} eq 'safari') &&
>> +        ($env{'browser.os'} eq 'mac')) { return 1; }
>> +    return 0;
>> }
>>
>> #
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>> LON-CAPA-dev at mail.lon-capa.org
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>
> --
> Mark Lucas 								email: lucasm at ohiou.edu
> 252D Clippinger Lab						phone: (740)597-2984
> Department of Physics and Astronomy		fax: (740)593-0433
> Ohio University
> Athens, OH 45701
>