Increase amount of playable YouTube videos by deciphering the ones that require to do so.
Many thanks to "node-ytdl-core" devs for JS regular expressions needed for YouTube player parsing.
Let GTK handle setting queue resize/render on the widget. We are not accessing widget values at this time, so it can be unlocked. It will be locked back during the render.
The customized GTK4 sink version has few differences from the one shipped as part of GStreamer. Rename custom sink to GstClapperGLSink to avoid confusion.
Changing transition in middle or when not fully revealed has dire consequences, seems to be a GTK4 bug. Workaround this bug by switching top revealer transition type only when fully revealed.
Player window is considered mobile friendly with its transitions and touch/swipes gestures implemented. The only missing part now is preferences window that needs moving to libadwaita. Due to video playback being mobile friendly, mark this app as Purism Mobile compatible which will allow the app to appear on mobile app store and show the app icon in app launcher.
Instead setting value to volume scale, set value to the player itself. Scale will be updated due to bidirectional binded property. This fixes cases where slider did not emit value-changed notify as it was being set to the same value as initial one.
Bottom revealer motion controller was causing timeout to be cleared. Prevent that by making it child invisible when windowed, which will remove its allocated height and motion events will not be emitted.
Instead of setting hide controls timeout immediately when starting revealing, make the time controls are revealed constant by setting timeout after animation finishes.
GStreamer needs to perform a seek when changing playback rate. Snapping at next keyframe causes viewer to lose few seconds of video when changing playback speed (and ugly fast forward effect when dragging speed slider). Prevent all those issues by seeking to the nearest keyframe instead.
Now that player API itself is operating on a cubic scale (no value conversion required), the volume slider can be bind to the volume property. Thanks to that, player volume scale will correctly reflect Clapper volume set via external applications e.g. gnome-settings.
Fullscreen bottom controls panel does not look good when progress bar is too long (especially on "ultrawide" displays), so limit its max width to 1720 application-pixels. This should make it still long enough for convenient chapter seeking.
