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GNOME 51 moves event handling off actor vfuncs and onto Clutter actions,
gestures and key binding pools. The shell classes stopped overriding
`vfunc_*_event` and grew signal handlers instead. Those vfuncs still
exist on `Clutter.Actor`, so nothing fails to compile. The declarations
just stopped describing the shell.
Checked against gnome-shell at tag 51.beta, module by module, for every
declared name that changed between 50.4 and 51.beta:
appDisplay BaseAppView/AppDisplay._onScroll now takes the
ScrollController signal arguments; _onKeyPressEvent is a
binding pool closure
boxpointer _muteKeys is a KeyController, _muteInput a ClickGesture
calendar vfunc_scroll_event -> _onScroll
dialog vfunc_event -> KeyController
layout HotCorner.vfunc_leave_event is gone
messageList URLHighlighter motion/leave -> MotionController;
Message.vfunc_key_press_event -> _closeIfAllowed
messageTray _onNotificationKeyRelease -> binding pool
modalDialog vfunc_captured_event is gone
search new exported SearchEntry with activate-new-instance
slider scroll/key vfuncs -> _onScroll, _moveLeft, _moveRight
backlight SliderItem forwards vfunc_navigate_focus
volume _handleScrollEvent -> _onScroll + _handleScroll
switcherPopup key/scroll vfuncs -> _onKeyPress, _onModifierChange,
_onScroll
userWidget new showAvatar/hideAvatar
Everything added here carries `@version 51`, including the handlers
whose arguments 51 reshaped.
Checking these modules against 51.beta turned up a second group. These
names are absent at 50.4 as well, so gnome-shell dropped them in an
earlier cycle and they describe an API no supported shell has.
appFavorites _onFavsChanged
calendar _dndSwitch, _dndButton and the DoNotDisturbSwitch class
behind them (the switch moved to quick settings)
layout HotCorner._entered, _onCornerEntered, _onCornerLeft,
_setupFallbackCornerIfNeeded, _pendingLoadBackground
messageList URLHighlighter button press/release vfuncs,
NotificationMessage._getIcon/_onUpdated,
MediaMessage._secondaryBin/_closeButton
messageTray _onNotificationShow
popupMenu _motionEvent, _touchDragging
search _onPan
slider button press/release and touch vfuncs, startDragging,
_endDragging, _motionEvent, scroll
switcherPopup vfunc_button_press_event
Slider gains `step(nSteps)` in the same pass. It replaced
`scroll(event)`, `status/volume` calls it, and it was never declared. It
predates 51, so it carries no `@version` tag.
Only modules that GNOME 51 touched are in scope here. The rest of the
package has more of this; the PR description lists it.
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