Add debug log message to print each bar's widget tree #927
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spdlog bundles a version of fmt. However, we also depend on and use fmt directly. If we don't tell spdlog not to use its bundled version, we end up with two versions of fmt in our include path, since both libraries are header-only, meaning any slight API mismatches will cause build failures and undesired behavior. We seem to have gotten lucky so far, but I ran into all sorts of issues when I tried to update to a newer version of spdlog. This change prevents them.
Among other changes, this adds spdlog::should_log(), which lets us easily determine whether a log message will be printed so that we can avoid extra computation when unnecessary. New wrap file taken from https://wrapdb.mesonbuild.com/spdlog and modified to download from GitHub as per commit 99dde1a ("Download patch files from Github instead of wrapdb").
This is very useful when writing CSS that affects more than just a
single widget. Pass `-l debug` to enable debug logging and show this
information.
Example output:
[2020-11-30 12:38:51.141] [debug] GTK widget tree:
window#waybar.background.bottom.eDP-1.:dir(ltr)
decoration:dir(ltr)
box.horizontal:dir(ltr)
box.horizontal.modules-left:dir(ltr)
widget:dir(ltr)
box#workspaces.horizontal:dir(ltr)
widget:dir(ltr)
label#mode:dir(ltr)
widget:dir(ltr)
label#window:dir(ltr)
box.horizontal.modules-center:dir(ltr)
box.horizontal.modules-right:dir(ltr)
widget:dir(ltr)
box#tray.horizontal:dir(ltr)
widget:dir(ltr)
label#idle_inhibitor:dir(ltr)
widget:dir(ltr)
label#pulseaudio:dir(ltr)
widget:dir(ltr)
label#network:dir(ltr)
widget:dir(ltr)
label#cpu:dir(ltr)
widget:dir(ltr)
label#memory:dir(ltr)
widget:dir(ltr)
label#temperature:dir(ltr)
widget:dir(ltr)
label#backlight:dir(ltr)
widget:dir(ltr)
label#battery:dir(ltr)
widget:dir(ltr)
label#clock:dir(ltr)
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Updated with commits that bump the bundled spdlog version, since the one we had previously doesn't have |
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Thanks, useful! |
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Maybe, add a sentence to the github wiki about this? |
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This is very useful when writing CSS that affects more than just a single widget. Pass
-l debugto enable debug logging and show this information.Example output: