Support for cap_html_filtering condition

[MasterKia]

Issue Details

Similar: #2146

https://github.com/gorhill/uBlock/wiki/Static-filter-syntax#if-condition

Sometimes an annoyance or popup case can be dealt with by either removing the script from that page entirely (HTML filtering) or with the use of scriptlets and it makes sense that the scriptlet rules don't get injected into a page that HTML filtering has already been applied to.

So I use this in my list:

example.com##^script:has-text(BadStuff)
!#if !cap_html_filtering
example.com##+js(FirstScriptlet)
example.com##+js(SecondScriptlet)
example.com##+js(ThirdScriptlet)
!#endif

For AdGuard it can be translated into !#if (!adguard_app_windows && !adguard_app_mac && !adguard_app_android && !adguard_ext_firefox) but it makes sense to have a dedicated condition for this.

Proposed solution

!#if cap_html_filtering

Alternative solution

!#if (!adguard_app_windows && !adguard_app_mac && !adguard_app_android && !adguard_ext_firefox)

[ameshkov]

We'll also need this in CoreLibs.

[krystian3w]

Maybe should be "delayed" until fix #2646 and reverted these: AdguardTeam/FiltersRegistry#596

I don't think AdGuard Asian users use a list outside the adtidy.org server on a daily basis by:

• https://subscribe.adblockplus.org/?location=1&title=2
• abp:subscribe?location=1&title=2
• abp://subscribe?location=1&title=2

share mechanism (as HTML links).

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Note

A little off-topic:

It is definitely worth analyzing whether the AdGuard domain (or IP range) is banned in some countries periodically or permanently for years.