feat: add Linux support for Live Notifications toasts w/ libnotify

[camporter]

Add libnotify notification support for channels going live. Would be nice to have notifications for other things as well, but this is just adding an equivalent for wintoast.

Disabled QT keywords to not clash with glib 😞 there's probably a better way to do this.

Fixes #5782

There's a lot of testing that needs to be done and build concerns, so leaving as a draft.

[Nerixyz]

Disabled QT keywords to not clash with glib 😞 there's probably a better way to do this.

Could you do this in another PR? This makes the diff way larger than it actually is. You can remove emits (imo) - they're cosmetic and don't do anything.

[pajlada]

Hi! Thanks for your initial PR, I just wanted to let you know that the use of libnotify seems like a good idea from my perspective.

[8thony]

• Towards Rewrite the toasts implementation for crossplatform #1000

[github-actions]

clang-tidy made some suggestions

[killertofus]

the aur version of chatterino will also need to include libnotify as a dep then

[camporter]

Thanks, happy to provide a PKGBUILD patch but it should just be libnotify in the deps.

Missed nixos in the docs so updated.

[camporter]

I have some Highlight -> Toast behavior done

but that should probably wait for the live notification and build issues to be resolved first.

[pajlada]

@camporter I would prefer if desktop notifications for highlights is not added in this PR - It's too much of a separate feature. I'm currently looking into changing the way highlights are modified (more options means more checkboxes in the current way of doing things, and that gets really unwieldy)

If you want to add some way to test desktop notifications easier, feel free to add an additional branch to the /debug-test command

[camporter]

Thanks, added a debug option for notifications and tried a variety of random channels.

Remaining things:

• The linux builds I believe are breaking because the container images will need an update.
• For freebsd, considering leaving libnotify off..

[Wissididom]

For the container update you could make a PR in https://github.com/Chatterino/docker where you update Dockerfile_chatterino2-build-ubuntu-20.04, Dockerfile_chatterino2-build-ubuntu-22.04 and Dockerfile_chatterino2-build-ubuntu-24.04. I think from what I've read in the error message that it might be enough to just install libnotify or smth in those container images. After pajlada than merges the PR in Chatterino/docker and you wait until the build on master is complete, the new docker images should be available for pulling/in the workflow.

[camporter]

Ah thanks, confused the separate repo with the .docker dir. Opened a PR over there 🙂

[pajlada]

Small nits, otherwise seems good

[Nerixyz]

I wonder if we could make our own small notification library (I'd be fine with a submodule here). Implementing this for macOS doesn't seem to be that complicated either (KNotifications impl - ObjectiveC might be the hardest part here). Maybe after EventSub is in a decent state.

[Nerixyz]

Could ensureInitialized and initialized_ be defined in a single block? They're the same on Windows and with libnotify. Maybe the send* functions could be united as well. Something like sendPlatformNotification? It would include the platform for now (#5914).

[pajlada]

Probably best to leave for follow-up PR, or for whenever notifications are touched again

[camporter]

I left these separate just to avoid getting into too much rework here, but combining them or moving them into a library seems good. The macos notification stuff required signing and other conditions that I didn't wade into. I don't boot windows up very often to test there either 😆

For linux/freebsd, you could also avoid libnotify and use dbus directly, but a bit more involved to do.

[pajlada]

Looks like you can apply this patch to fix the FreeBSD build, and it also just looks simpler

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 24ddbe7b..05a83ebd 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1065,10 +1065,8 @@ if (UNIX)
 
     if (NOT APPLE AND BUILD_WITH_LIBNOTIFY)
         find_package(PkgConfig REQUIRED)
-        pkg_check_modules(LIBNOTIFY REQUIRED libnotify)
-        include_directories(${LIBRARY_PROJECT} ${LIBNOTIFY_INCLUDE_DIRS})
-        target_link_libraries(${LIBRARY_PROJECT} PRIVATE ${LIBNOTIFY_LIBRARIES})
-        target_link_directories(${LIBRARY_PROJECT} PRIVATE ${LIBNOTIFY_LIBRARY_DIRS})
+        pkg_check_modules(LIBNOTIFY REQUIRED IMPORTED_TARGET libnotify)
+        target_link_libraries(${LIBRARY_PROJECT} PRIVATE PkgConfig::LIBNOTIFY)
         target_compile_definitions(${LIBRARY_PROJECT} PUBLIC CHATTERINO_WITH_LIBNOTIFY)
     endif ()
 endif ()

[pajlada]

Notifications works for me, valgrind doesn't complain about anything (new) - Thank you!