[texworks] what is a default browser?

[Stefan Löffler]

Hi,

On 2011-07-15 06:34, Atsuhito Kohda wrote:
> recently TeXworks provides nice manual and we can see
> it from menu with a browser.
>
> But, strangely, on one of my Debian system it calls 
> /opt/google/chrome/google-chrome as a browser and, 
> because there is no such browser on my system, it fails 
> to show me a manual.  (On another system, it works fine.)
>
> I investigated various methods to define a default browser,
> like x-www-browser, gconf-editor etc. but no success.
>
> I'd like to know how TeXworks selects a default browser
> for manual and if we can define it at compile time.

TeXworks uses QDesktopServices::openUrl (src/TWApp.cpp at 305), documented
at http://doc.trolltech.com/latest/qdesktopservices.html#openUrl
That resource just states "Opens the given /url/ in the appropriate Web
browser for the user's desktop environment".

Digging into the Qt source code (Qt 4.7.2,
src/util/gui/qdesktopservices_x11.cpp) suggests the following things are
tried:
1) `xdg-open`
2) `gnome-open` or `kfmclient exec` (depending on desktop environment)
3) firefox
4) mozilla
5) netscape
6) opera

(note that this applies to local files (file:// protocol). For others,
the DEFAULT_BROWSER and BROWSER environment variable are tried between
attempts 1) and 2).

So, you probably know better how to configure these tools than I do, but
it should get you started in the right direction :).

HTH
Stefan
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