IITC-Mobile: better support for external userscripts at gitlab/github

[johnd0e]

Currently we have such intent filter:

.*\\.user.js

ingress-intel-total-conversion/mobile/app/src/main/AndroidManifest.xml

Lines 104 to 116 in 36a9b69

	<intent-filter>
	<action android:name="android.intent.action.VIEW"/>
	<action android:name="android.nfc.action.NDEF_DISCOVERED"/>
	<category android:name="android.intent.category.DEFAULT"/>
	<category android:name="android.intent.category.BROWSABLE"/>
	<data android:scheme="content"/>
	<data android:scheme="file"/>
	<data android:scheme="http"/>
	<data android:scheme="https"/>
	<data android:host="*" android:pathPattern=".*\\.user.js"/>
	</intent-filter>

On github/gitlab it triggers on 'blob' pages, like these:
https://github.com/TheSned/IITCPlugins/blob/master/extend-poly-lines.user.js
https://gitlab.com/AlfonsoML/wayfarer/-/blob/master/wayfarer-planner.user.js

But IITCm is unable to handle them: if we try to install from such url, then we get useless html output (installed plugin appears in list as "unknown").

So better to exclude such urls from filter.
And much even better - tranform the urls to raw source:
https://github.com/TheSned/IITCPlugins/raw/master/extend-poly-lines.user.js
https://gitlab.com/AlfonsoML/wayfarer/-/raw/master/wayfarer-planner.user.js

test urls

https://github.com/TheSned/IITCPlugins/blob/master/extend-poly-lines.user.js
https://gitlab.com/AlfonsoML/wayfarer/-/blob/master/wayfarer-planner.user.js

https://github.com/TheSned/IITCPlugins/raw/master/extend-poly-lines.user.js
https://gitlab.com/AlfonsoML/wayfarer/-/raw/master/wayfarer-planner.user.js

https://rawcdn.githack.com/TheSned/IITCPlugins/b52007347b1abab2b5be95c19f7f6ac0bb3d8aff/extend-poly-lines.user.js
https://glcdn.githack.com/AlfonsoML/wayfarer/-/raw/master/wayfarer-planner.user.js

Related to #257

[johnd0e]

Anyway, on mobile it may be tricky to pass plugin to IITC.

• Download it.
  • Then try to just open file. In most cases IITC should come into list of proposed apps to handle the file.
  • Or open it from IITC (Add external plugin), this also works for most cases.
  • Or just manually move into /IITC_Mobile/plugins
• Open directly from some app.
  • E.g. link posted in Telegram chat
  • In Chrome: in most cases link referring to *.user.js will be proposed to open in IITC.
    (not works for gitlab for some reason)
  • In some browsers there is possibility to pass current page to external app.
    This works in embedded browsers (Chrome custom tab), etc.
    Firefox also has this feature (look for android icon on action bar), but it currently does not work on github (though Firefox Preview is ok).

You see, I use for most cases wording very often.
That's mean that whole thing is not reliable enough, and in general, user experience here is not good.

We can make it better if we add one more possibility: install plugins via sharing.

• Currently IITC does not handle this case.

But there are some helpers in Google Play

• https://play.google.com/store/apps/details?id=com.kakkun61.opensharedurl (very tiny)
• https://play.google.com/store/apps/details?id=com.tasomaniac.openwith

Anyway, we should implement share handling in IITC directly.