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This commit introduces a new Aerc.Tick function that should be called to
refresh the internal state. This in turn makes each AccountView process worker
events.
The UI goroutine repeatedly refreshes the internal state before drawing a new
frame. The reason for this is that many worker messages may need to be
processed for a single frame, and drawing the UI is far slower than refreshing
the internal state. This has been confirmed in my testing (calling Aerc.Tick
only once per frame results in a slower display).
Many synchronization code has been removed. We can now write widgets without
having to care so much about races. The remaining sync users are:
- widgets/spinner: the spinner value is updated from inside an internal
goroutine
- lib/ui/invalidatable: Invalidate may be called from any goroutine
- lib/ui/grid: same
- lib/ui/ui: an internal goroutine needs read access to UI.exit
- worker/types/worker: Worker.callbacks is used for both worker and UI
callbacks
The exact goroutine requirements for Drawable have been documented.
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UI.Exit can be accessed from goroutines drawing, goroutines executing
commands and goroutines waiting for events.
Write at 0x00c0002b2040 by main goroutine:
main.main.func1()
/home/simon/src/aerc2/aerc.go:76 +0x33d
git.sr.ht/~sircmpwn/aerc2/widgets.(*Aerc).BeginExCommand.func1()
/home/simon/src/aerc2/widgets/aerc.go:245 +0x89
git.sr.ht/~sircmpwn/aerc2/widgets.(*ExLine).Event()
/home/simon/src/aerc2/widgets/exline.go:131 +0x442
git.sr.ht/~sircmpwn/aerc2/widgets.(*Aerc).Event()
/home/simon/src/aerc2/widgets/aerc.go:116 +0x83c
git.sr.ht/~sircmpwn/aerc2/widgets.(*Aerc).simulate()
/home/simon/src/aerc2/widgets/aerc.go:109 +0x12a
git.sr.ht/~sircmpwn/aerc2/widgets.(*Aerc).Event()
/home/simon/src/aerc2/widgets/aerc.go:142 +0x722
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*UI).Tick()
/home/simon/src/aerc2/lib/ui/ui.go:75 +0x33f
main.main()
/home/simon/src/aerc2/aerc.go:94 +0x497
Previous read at 0x00c0002b2040 by goroutine 19:
git.sr.ht/~sircmpwn/aerc2/lib/ui.Initialize.func1()
/home/simon/src/aerc2/lib/ui/ui.go:45 +0x97
Goroutine 19 (running) created at:
git.sr.ht/~sircmpwn/aerc2/lib/ui.Initialize()
/home/simon/src/aerc2/lib/ui/ui.go:44 +0x372
main.main()
/home/simon/src/aerc2/aerc.go:87 +0x3a9
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This is a simple mostly straight forward switch to tcell in favor of
termbox.
It uses the tcell native api (not the compat layer) but does not make
use of most features.
Further changes should include moving to tcell's views.TextArea and the
general built in widget behaviour instead of the current ad hoc
implementation.
Regression: Cursor isn't shown in ex-line
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