Re: [docbook-apps] Slow TOC tree in webhelp when there are a largenumberof heading entries

[David Cramer <david@thingbag.net>]

Thanks for reporting the information Denis. I've opened a tracker item
for it:
https://sourceforge.net/tracker/?func=detail&aid=3266134&group_id=21935&atid=373747

David

On 03/31/2011 06:22 PM, Denis Bradford wrote:
> When I ran a medium-size webhelp document on MSIE 8 and clicked a
> search result I also got slow performance. And this error, which even
> appears when I run the small webhelp demo.
>
> ================
> Webpage error details
>
> User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1;
> Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR
> 3.0.04506.30; .NET CLR 3.0.04506.648; InfoPath.2; .NET CLR
> 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; .NET4.0E)
> Timestamp: Fri, 25 Feb 2011 20:59:29 UTC
>
>
> Message: Object doesn't support this property or method
> Line: 65
> Char: 13
> Code: 0
> URI: file:///C:/webhelp/demo/out/common/main.js
> ================
>
> Here's the referenced line in main.js:
>   if (style != null && !style.match(/background-color: Background;/)) {
>
> The generated HTML has this line with the background-color style:
> <div id="leftnavigation" style="padding-top:3px;
>    background-color:white;">
>
> Maybe this error explains why expanded TOC trees don't have shaded
> backgrounds in MSIE 8, as they do in other browsers.
>
> Googling on this connection, I read that MSIE 8 doesn't support the
> match function. I tried switching to the search function, with the
> same result.
>
> Too bad you can't just advise people not to use MSIE -- that might
> solve a whole bunch of other problems too ;-)
>
> Cheers,
> Denis
>
> On 03/31/2011 06:41 PM, david@thingbag.net wrote:
>> Also see the Recommended Apache Configurations section to improve
>> performance. In fact, those settings are all things Kasun researched
>> last summer :-) The TDG example on thingbag.net that Kasun pointed to
>> benefits from those settings:
>>
>> http://docbook.sourceforge.net/release/xsl/current/webhelp/docs/content/ch02s02.html
>>
>>
>> The TDG example is a pretty large book and it works ok in webhelp. At
>> some point, however, you would indeed hit a limit since one of the side
>> effects of having no frameset is that the toc tree is on every page in a
>> div.
>>
>> A possible improvement would be to store the toc tree in a separate js
>> file, so it could be cached. It's on the list of things we'd like to
>> improve: http://docbook.xmlpress.net/tiki-index.php?page=WebHelp2011
>>
>> Thanks,
>> David
>>
>