[Bug 22621] New: RFE: Add font autoinstallation support

https://bugs.webkit.org/show_bug.cgi?id=22621

Summary: RFE: Add font autoinstallation support
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: Enhancement
          Priority: P2
         Component: Text
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
                CC: [e-mail]

The Linux platform is gaining an on-demand font autoinstallation framework (BSD
and Solaris will probably follow eventually).

http://fedoraproject.org/wiki/Features/AutomaticFontInstallation

Webkit browsers should be plugged into it and use it to request the fonts the
pages they render need. This would have a huge user impact, especially for
pages that have strong i18n constrains.

Unlike proposals such as @font-face and EOT the fonts are sourced from trusted
user-controlled sources, are properly vetted legal-side, use the latest font
versions not old obsolete ones (with bug fixes), and are installed system-wide
where other apps can take advantage of them.

[Bug 22621] RFE: Add font autoinstallation support

https://bugs.webkit.org/show_bug.cgi?id=22621

Frédéric Wang (:fredw)  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
                 CC|                            |[e-mail],
                   |                            |[e-mail]
             Blocks|                            |38377, 133604
     Ever Confirmed|0                           |1

--- Comment #1 from Frédéric Wang (:fredw)   2014-06-21 01:31:11 PST ---
This might be useful for the MathML support. Currently, the status of OpenType MATH fonts on Linux is

https://developer.mozilla.org/en-US/docs/Mozilla/MathML_Project/Fonts#Linux

and after bug 133604, "Latin Modern Math" is tried as the default font.

Gecko's bug is

https://bugzilla.mozilla.org/show_bug.cgi?id=467729

and there is a patch there that could be used as an example.

The main issue here is to decide how to detect missing fonts and to determine which fonts to ask PackageKit to install. There is a patch here in Gecko:

https://bugzilla.mozilla.org/show_bug.cgi?id=619521

[Bug 22621] RFE: Add font autoinstallation support

https://bugs.webkit.org/show_bug.cgi?id=22621

Frédéric Wang (:fredw)  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
         Depends on|                            |133604
             Blocks|133604                      |114565

[Bug 22621] RFE: Add font autoinstallation support

https://bugs.webkit.org/show_bug.cgi?id=22621

--- Comment #2 from Martin Robinson   2014-06-21 15:26:30 PST ---
Since WebKitGTK+ is an embedding library and not a browser, this should probably be handled by distributions that make the packages or by browsers that actually embed WebKit. Perhaps the answer is different for other WebKit ports.

[Bug 22621] RFE: Add font autoinstallation support

https://bugs.webkit.org/show_bug.cgi?id=22621

Frédéric Wang (:fredw)  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #3 from Frédéric Wang (:fredw)   2014-06-22 01:06:58 PST ---
It seems to me that if we want this feature, WebKit should at least expose an API to register a callback for "missing fonts" that would provide some info about the font needed to render a visited page. Then browsers can use that to call PackageKit.

Note that math is a bit different than "human" language. In general, Linux distributions are localized and thus contains the appropriate fonts for the script of the current language, so autoinstallation would only be for languages other than the one of the system. For math, we don't really have a way to know if the user of the system is interested in math, even if the fact that a TeX distribution is installed (and thus Latin Modern Math) is one possibility. Autoinstallation would allow to guess that by checking that Math(ML) pages are visited.