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This fixes the following crash that happens with the default xmobar
configuration (using HOME=/ makes xmobar ignore ~/.xmobarrc):
$ echo "<fn=1>x</fn>" | HOME=/ xmobar
xmobar: Prelude.!!: index too large
Commit 3e9e1cb9d300 ("Fix crashes/busy looping happening via index")
meant to fix this but apparently it only fixed indexing of fontlist, not
voffs, so the crash was still there.
Fixes: https://github.com/jaor/xmobar/issues/504
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The readme says additional fonts are centered vertically if a
corresponding offset isn't specified in `textOffsets`, but this didn't
happen as we used the first font's metrics for centering of all fonts
instead.
Fixes: a2365debfaba ("New configuration parameter `textOffsets` (fixes #311)")
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This makes the Date plugin approximately twice as fast, and makes xmobar
up to about 5–10 % faster if Date is the only active plugin. (If more
expensive plugins like Network or MultiCpu are used, it doesn't make any
measurable difference.)
Micro-benchmark results on my HW:
Date Benchmarks/Date mean 2.833 μs ( +- 16.08 ns )
Date Benchmarks/DateZonedTime mean 5.020 μs ( +- 32.91 ns )
Date Benchmarks/DateWithTimeZone mean 2.827 μs ( +- 20.52 ns )
(DateZonedTime is the original implementation and DateWithTimeZone is
the implementation we had since 0.34 which never refreshes timezone.)
Real-life measurements (done overnight on an idle laptop, with all
measured xmobars running in parallel to ensure comparable conditions;
xmobars configured to only display date and with rate 10 — once per
second):
$ time timeout 6h xmobar .xmobarrc-DateZonedTime
real 360m0,010s
user 0m9,867s
sys 0m4,644s
(9.867 + 4.644) / (360 * 60) = 0.000672
$ time timeout 6h xmobar .xmobarrc-Date
real 360m0,008s
user 0m9,535s
sys 0m4,327s
(9.535 + 4.327) / (360 * 60) = 0.000642
$ time timeout 6h xmobar .xmobarrc-Date-10m
real 360m0,010s
user 0m9,780s
sys 0m4,215s
(9.780 + 4.215) / (360 * 60) = 0.000648
$ time timeout 6h xmobar .xmobarrc-DateWithTimeZone
real 360m0,006s
user 0m9,658s
sys 0m4,166s
(9.658 + 4.166) / (360 * 60) = 0.000640
(.xmobarrc-Date-10m is the proposed implementation, but with timezone
refresh every 10 minutes instead of every 1 minute)
Interpretation of these results:
* refreshing xmobar with just date takes around 650 μs
* that is xmobar with just date uses around 0.065 % of CPU time
* refreshing timezone takes additional cca 30 μs
When we only refresh timezone once a minute, these 30 μs become 0.5 μs
amortized, and that should be acceptable to even the most dedicated
perfectionist :-)
Fixes: a58e32f7c8af ("Revert "Optimize date plugin"")
Fixes: 878db3908060 ("Optimize date plugin")
Co-authored-by: Sibi Prabakaran <sibi@psibi.in>
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A missing bit from a58e32f7c8af7b03410ab6693019cfc92c9cfca3.
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This reverts commit 878db39080607ba476ba8d8f547ad28259efb6a9. That
commit optimized the date plugin by avoiding calling getTimeZone on each
execution, instead calling it just once upon startup and reusing that
zone. As a result, the time zone will not be updated dynamically, e.g.
when shifting in or out of daylight savings time.
I noticed this after my local time zone had shifted from EDT to EST. My
xmobar showed 4:30 when the local time was in fact 3:30 (and running
date on the command line confirmed that my system clock was actually
aware of this shift). I had to restart xmobar in order to pick up the
new time zone.
I repro'd the unexpected behavior by temporarily disabling my system's
time syncing, setting the time to 30 seconds before the zone shift,
running date to confirm I'd set the correct time, restarting xmobar, and
observing.
sudo systemctl stop systemd-timesyncd.service
date --set="01:59:30"
date
I observed my xmobar clock go from 1:59 to 2:00, rather than from 1:59
to 1:00 as expected.
Following the same steps, I was able to verify that this commit fixes
the issue.
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There's a longstanding bug in timezone-olson that causes it to fail to
read some zoneinfo files (but not all, oddly). This was resolved in
timezone-olson-0.2.0 which can be built against by using a later
Stackage snapshot than master currently points to.
This fix pushes the snapshot up to lts-16.0 and also modifies the
cabal version range for timezone-olson to set 0.2.0 as the minimum.
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- Relates to #491
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Provide an option the user can specify any number of times to add to the
additionalFonts config field.
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With this change, xmobar should respect the data which it gets. Xmobar
should just render the data instead of trying to encode it.
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spotifyd is funky that way
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Both functions had a default parameter for use in some error cases. Now each accepts only one parameter (a
PerChannel), and return Nothing on an error.
The definition of 'channel' confused me, so I simplified it. Hopefully it's now
more clear that it just applies 'toInteger' to the 'IO (Maybe
CLong)' that 'channel'' returns.
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ColorInfo contains background offsets, it is no longer only about colors
TextRenderInfo can hold information such as color, offsets, etc
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Implemented only for XFT fonts.
Adds a new "part" in the fc tag.
> Example: <fc=white,gray:0>foo bar</fc> will make the font background
as tall as the bar (absolute offset, here set to 0 for both top &
bottom)
Changes ColorString to ColorInfo, containing both top and bottom
offsets. The "colors string" is still in only one string.
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