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Use Vaxis library directly to initialize the UI, dropping the need for a
tcell Screen implementation
Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Acked-by: Robin Jarry <robin@jarry.cc>
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Modify the function signature of Event and MouseEvent interfaces to
accept vaxis events. Note that because a vaxis event is an empty
interface, the implementations are not affected and the events are
delivered as they were before
Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Acked-by: Robin Jarry <robin@jarry.cc>
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There is no need for an UI object. The Aerc.ui field is unused. And
there is a single instance of it anyway.
Move the object's public fields as global variables and change methods
to public functions.
This makes the code cleaner and removes boilerplate.
Signed-off-by: Robin Jarry <robin@jarry.cc>
Acked-by: Moritz Poldrack <moritz@poldrack.dev>
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There are several ways the ui message channel can fill up leading to
deadlocks.
1) Invalidate() changes the value of uiState to DIRTY. The following
call sequence:
QueueRedraw()
Invalidate()
QueueRedraw()
Leads to multiple nil messages being queued in the message channel
whereas one could assume that the second QueueRedraw() would do
nothing. This is caused by the tri-state nature of uiState.
2) We use the same channel to convey state change, keyboard events and
redraw requests. Since a keyboard event almost always triggers
a redraw, we end up trying to append a redraw message in the same
goroutine that reads from the channel. This triggers a deadlock when
there are more than 50 pending messages.
Solve the issue by using multiple channels, one per type of message that
needs to be sent to the main ui thread.
Remove QueueRedraw() and merge its functionality in Invalidate(). Only
use a DIRTY/CLEAN state to determine if something needs to be queued in
the redraw channel.
Use a channel for quitting instead of an atomic. Restructure some code
functions to have a cleaner API.
Use a for loop in the main thread and select from all channels.
Signed-off-by: Robin Jarry <robin@jarry.cc>
Tested-by: Koni Marti <koni.marti@gmail.com>
Tested-by: Maarten van Gompel <proycon@anaproy.nl>
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Another attempt at fixing the high CPU usage when terminal tabs are
running interactive tui applications and the message list tab is
selected.
There are cases where a terminal widget can be visible but not focused
(composer, message viewer, attachment selector, etc.). Define a new
Visible interface with a single Show() method. Call that method when
changing tabs to make sure that terminal widget content events only
trigger redraws when they are visible.
Fixes: 382aea4a9426 ("terminal: avoid high cpu usage when not focused")
Signed-off-by: Robin Jarry <robin@jarry.cc>
Tested-by: Koni Marti <koni.marti@gmail.com>
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Rework how tabs are closed. Change the aerc.RemoveTab and
aerc.ReplaceTab functions to accept a new boolean argument. If true,
make sure to close the tab content.
Signed-off-by: Robin Jarry <robin@jarry.cc>
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Remove invalidatable type and all associated calls. All items can
directly invalidate the UI.
Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Acked-by: Robin Jarry <robin@jarry.cc>
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Add AercMsg as a main interface for internal communication in aerc in
preparation for a main event loop. Add a QueueRedraw function to to
trigger a redraw. This will be needed for widgets which should be drawn
after some delay (completions, terminal, for example)
Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Acked-by: Robin Jarry <robin@jarry.cc>
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Also update to the tcell v2 PaletteColor api, which should keep the chosen
theme of the user intact.
Note, that if $TRUECOLOR is defined and a truecolor given, aerc will now stop
clipping the value to one of the theme colors.
Generally this is desired behaviour though.
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This adds the Mouseable interface. When this is implemented for a
component that item can accept and process mouseevents.
At the top level when a mouse event is received it is passed to the
grid's handler and then it trickles down until it reaches a component
that can actually handle it, such as the tablist, dirlist or msglist.
A mouse event is passed so that components can handle other things such
as scrolling with the mousewheel. The components themselves then perform
the necessary actions.
Clicking emails in the messagelist opens them in a new tab.
Textinputs can be clicked to position the cursor inside them.
Mouseevents are not forwarded to the terminal at the moment.
Elements which do not handle mouse events are not required to implement
the Mouseable interface.
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Add a "new-message-bell" option to the UI section of aerc.conf. A new
hook into the message store allows the msglist widget to detect new
messages being added to the displayed list. When new messages are
delivered, and the new-message-bell option is enabled (as it is by
default), the terminal will beep.
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This introduces a new interface `Clickable`. I'd imagine this would be
implemented for most widgets eventually and would allow for programs run
in the terminal to also have their mouse events forwarded to them.
For the tabs it was relatively simple to check that the position of the
click is within the boxes for the tabs. For other components I'd imagine
that some state representing their currently drawn bounding box would be
useful.
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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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