> Unless I misunderstood what you mean: this already exists. On the page > you linked to above look for “reply via email to”. It’s followed by a > button. When you click on it you get a “mailto”-Link.
Whoops. I should have read the page better. However, clicking on that button in icecat does not send E-Mail for me. Monitoring the network interface I can see that it redirects to a mailto: URL. So that's nice. Checking the application preferences of icecat, it only gives "always ask" (note: it doesn't ask) and not an application for "mailto". (in GuixSD) Creating my own HTML page with a mailto link doesn't work either. Therefore, I reported a bug to Guix too. Bug report follows: "mailto:"; links don't work in icecat. Checking the icecat source code, there are several ways to handle E-Mail. One of them is as "external helper app". One of those (not sure whether it's the correct one) uses gio's g_app_info_launch_default_for_uri in order to launch helper applications. There is a test icecat-38.8.0/uriloader/exthandler/tests/unit/test_handlerService.js that does: let isLinux = ("@mozilla.org/gio-service;1" in Components.classes); if (isLinux) { // Check mailto handler from GIO // If there isn't one, then we have no mailto handler let gIOSvc = Cc["@mozilla.org/gio-service;1"]. createInstance(Ci.nsIGIOService); try { gIOSvc.getAppForURIScheme("mailto"); noMailto = false; } catch (ex) { noMailto = true; } } And this ./toolkit/system/gnome/nsGIOService.cpp uses g_app_info_launch_default_for_uri . Therefore, I tried it out: #include <glib.h> #include <gio/gio.h> #include <stdlib.h> int main() { GError* error; g_app_info_launch_default_for_uri("mailto:f...@example.com";, NULL, &error); // g_app_info_launch_default_for_uri("http://www.google.at/";, NULL, &error); if (error) { g_warning("err %s", error->message); g_error_free(error); return 1; } else return 0; } I get: ** (process:12464): WARNING **: err Operation not supported If I debug it some more I get: $ strace -f ./g 2>&1 |grep open |grep -v ENOENT open("/home/dannym/.local/share//mime/mime.cache", O_RDONLY) = 3 open("/home/dannym/.guix-profile/share/mime/mime.cache", O_RDONLY) = 3 open("/run/current-system/profile/share/mime/mime.cache", O_RDONLY) = 3 open("/home/dannym/.guix-profile/share/mime/mime.cache", O_RDONLY) = 3 open("/run/current-system/profile/share/mime/mime.cache", O_RDONLY) = 3 open("/home/dannym/.guix-profile/lib/gio/modules", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 open("/home/dannym/.guix-profile/lib/gio/modules/giomodule.cache", O_RDONLY) = 4 open("/home/dannym/.guix-profile/lib/gio/modules/libdconfsettings.so", O_RDONLY|O_CLOEXEC) = 4 open("/run/current-system/profile/lib/gio/modules", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 open("/run/current-system/profile/lib/gio/modules/giomodule.cache", O_RDONLY) = 4 open("/gnu/store/6qrijb6cfyvs8svacr0l9a75vcpypr5f-glib-2.48.0/lib/gio/modules", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 open("/gnu/store/4lbgxvsk8xl75hlkjqgrqvmpq74app73-dconf-0.26.0/lib/gio/modules", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 open("/gnu/store/4lbgxvsk8xl75hlkjqgrqvmpq74app73-dconf-0.26.0/lib/gio/modules/giomodule.cache", O_RDONLY) = 4 open("/home/dannym/.guix-profile/lib/gio/modules", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 open("/home/dannym/.guix-profile/lib/gio/modules/giomodule.cache", O_RDONLY) = 4 open("/run/current-system/profile/lib/gio/modules", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 open("/run/current-system/profile/lib/gio/modules/giomodule.cache", O_RDONLY) = 4 open("/gnu/store/m3py3rk71ihlfgvj2kss7054hwfqwkpq-glib-2.48.0/lib/gio/modules", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 [pid 12632] open("/usr/share/locale/locale.alias", O_RDONLY <unfinished ...> [pid 12632] open("/home/dannym/.config/mimeapps.list", O_RDONLY) = 5 [pid 12632] open("/gnu/store/8m00x5x8ykmar27s9248cmhnkdb2n54a-glibc-2.22/lib/gconv/gconv-modules", O_RDONLY|O_CLOEXEC) = 5 [pid 12632] open("/home/dannym/.local/share/applications", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 5 [pid 12632] open("/home/dannym/.local/share/applications/mimeapps.list", O_RDONLY) = 5 [pid 12632] open("/home/dannym/.local/share/applications/mimeinfo.cache", O_RDONLY) = 5 [pid 12632] open("/home/dannym/.guix-profile/share/applications", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 5 [pid 12632] open("/run/current-system/profile/share/applications", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 5 [pid 12632] open("/run/current-system/profile/share/applications/mimeinfo.cache", O_RDONLY) = 5 [pid 12632] open("/home/dannym/.guix-profile/share/applications", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 5 [pid 12632] open("/run/current-system/profile/share/applications", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 5 [pid 12632] open("/run/current-system/profile/share/applications/mimeinfo.cache", O_RDONLY) = 5 There would be g_app_info_set_as_default_for_type () to set a new default application in nsGIOService - which is exposed and used by ./browser/components/shell/nsGNOMEShellService.cpp on setting icecat up as default browser (so not always). I'm using Fluxbox.
