Case insensitive filter

General · Post by **General** » Fri Jun 12, 2009 1:08 am

I wonder if there is trick or workaround to create case insensitive filters.

For example if I want to filter all ids with the name of advert regardless of its case. In other words, all of the following would match: ADVERT, Advert, ADvert, advert, AdVert and so on.

What should I do?

MonztA · Post by **MonztA** » Fri Jun 12, 2009 1:48 am

http://adblockplus.org/en/filters#optio ... match-case — makes the filter only apply to addresses with matching letter case, e.g. the filter */BannerAd.gif$match-case will block http://example.com/BannerAd.gif but not http://example.com/bannerad.gif.[/quote]

General · Post by **General** » Fri Jun 12, 2009 2:04 am

MonztA wrote:http://adblockplus.org/en/filters#optio ... match-case — makes the filter only apply to addresses with matching letter case, e.g. the filter */BannerAd.gif$match-case will block http://example.com/BannerAd.gif but not http://example.com/bannerad.gif.

[/quote]

Hmm... As far as I know element hiding rules and normal ad blocking rules behave differently. The default for element hiding rules is case sensitive.

Wladimir Palant · Post by **Wladimir Palant** » Fri Jun 12, 2009 8:22 am

As explained before, element hiding rules depend on CSS - you cannot do anything with them that you cannot do with CSS.

MonztA · Post by **MonztA** » Fri Jun 12, 2009 11:50 am

General wrote:Hmm... As far as I know element hiding rules and normal ad blocking rules behave differently. The default for element hiding rules is case sensitive.

Oh, I missed it that you were talking about Element Hiding Filters.

General · Post by **General** » Fri Jun 12, 2009 8:53 pm

Wladimir Palant wrote:As explained before, element hiding rules depend on CSS - you cannot do anything with them that you cannot do with CSS.

That is the part I don't understand.

All Selectors syntax is case-insensitive within the ASCII range (i.e. [a-z] and [A-Z] are equivalent), except for parts that are not under the control of Selectors. The case sensitivity of document language element names, attribute names, and attribute values in selectors depends on the document language. For example, in HTML, element names are case-insensitive, but in XML, they are case-sensitive.

We are trying to detect HTML pages, aren't we? It should be case insensitive. But the fact is Firefox 2 or below is case insensitive. Firefox 3 or higher is case sensitive. If it only depends on CSS only, why does it have such a strange behavior? I'm confused.

@MonztA
Never mind.

Ares2 · Post by **Ares2** » Fri Jun 12, 2009 9:17 pm

HTML 4.01 defines id and class as case-sensitive: http://www.w3.org/TR/html401/struct/global.html#h-7.5.2

from: https://developer.mozilla.org/en/Case_S ... d_id_Names

The Mozilla document seems rather old though (April 2005), so I don't know why Firefox 2 (October 2006) is still case-insensitive.