ekklesiaandClaude Opus 5
f65c814eff
Three things, none of them redesigns. The close affordance for a secondary Chrome window was a separate layer-shell surface anchored to that window's corner, repositioned by a five-per-second poll. Any position change tore the surface down and built another, so on real hardware it chased the window and flickered. Removed entirely: the GTK button process, the geometry maths that placed it, the --close-button mode that spawned it, and the poll loop that drove it. The window helper no longer imports GTK at all. The behaviour underneath it was right and is kept. The first Chrome top-level is the classroom browser, tiled and borderless; later ones float centred at about three quarters of the output. Creation order is the only thing that can tell them apart — confirmed on a real session, where every Chrome top-level shares app_id, shell, PID and a null transient_for, and sway exposes no window properties for Wayland toplevels at all. Titles are still not used. It now follows sway's own window events instead of polling, so dragging a popup costs nothing. Close moved into the dock, which was already on screen and does not move, so it cannot chase anything. It appears only while a secondary window is focused and runs kill on that one container. The helper publishes which window that is; the dock watches the file rather than polling. A stock sway title bar has no close button, so restoring the border would not have solved this either. Two bugs found by looking rather than by testing state. Chrome renegotiates the size of a popup opened with explicit dimensions after the resize returns, which left windows centred for a width they no longer had; placement now settles and repeats once, at creation only, so dragging is still free. And the dock's Close button came up empty because show_all does not recurse into a no-show-all widget. The printer's Location is now blank. CUPS prints it under the queue name in every dialog, so "Ekklesia Classroom" was a second line the teacher had to read past; the identity is one word. The already-configured check includes Location, so a machine set up before this is corrected rather than left as close enough. Co-Authored-By: Claude Opus 5 <[email protected]>
124 lines
3.7 KiB
Markdown
124 lines
3.7 KiB
Markdown
# Classroom printing
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The package installs and enables CUPS, its client/filter stack, and Debian's
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compressed Foomatic PPD database. Chrome is configured to open the system
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print dialog, which shows the queues configured in CUPS.
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The Ricoh Aficio MP C3502 supports PCL 5c and PCL 6 as standard; PostScript 3
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is optional. Debian Trixie does not provide a model-specific C3502 PPD in the
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installed driver set, so the classroom uses Trixie's recommended generic color
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PCL 6/PCL XL driver. This uses the printer's standard language and requires no
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vendor binary.
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## Automatic church printer
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Every provisioning pass runs:
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```
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classroom-printer-setup
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```
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It creates or updates this site-wide queue:
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| Setting | Value |
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| --- | --- |
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| Queue and display name | `Elmer` |
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| Printer | Ricoh Aficio MP C3502 |
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| Address | `10.10.0.155` |
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| Hardware address | `00:26:73:4F:E7:C9` |
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| URI | `socket://10.10.0.155:9100` |
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| Default | `Elmer` |
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| Print quality | `PrintoutMode=Normal` |
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| Color | `ColorModel=Color` |
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Those two print options are set explicitly. The generic driver otherwise chose
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`Normal.Gray` on the physical printer, which silently made jobs grayscale.
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If an older release created `Classroom_Color`, provisioning removes it before
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creating Elmer. A correct subsequent run reports that Elmer is already
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configured and does not rewrite the queue.
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The helper can still take an explicit address for diagnostics or future site
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changes:
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```
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sudo classroom-printer-setup 10.10.0.155
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sudo classroom-printer-setup ipp://10.10.0.155/ipp/print
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sudo classroom-printer-setup --no-default socket://10.10.0.155:9100
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```
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The command does not contact the printer while configuring CUPS. An
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unreachable printer only leaves jobs queued; the provisioning call is also
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capped at 30 seconds, so it cannot affect boot.
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## Network printer discovery
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Automatic remote queue browsing is disabled. `cups-browsed` is stopped and
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disabled, and both `avahi-daemon.service` and `avahi-daemon.socket` are stopped,
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disabled and masked. No other classroom component uses Avahi.
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This removes the direct DNS-SD destinations that `lpstat -e` can show even when
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cups-browsed is inactive, including the Brother check-in printer and the
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duplicate discovered Ricoh. The intended output is only:
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```
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$ lpstat -e
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Elmer
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```
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## Administration
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List the available Debian drivers, including the selected PCL path:
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```
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lpinfo -m
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lpinfo -m | grep -i -E 'Ricoh|PCL|PostScript|IPP Everywhere'
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```
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Show the queue, URI, system default and print defaults:
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```
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lpstat -p Elmer -v
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lpstat -d
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lpoptions -p Elmer -l | grep -E '^(PrintoutMode|ColorModel)/'
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```
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Set the default manually:
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```
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sudo lpadmin -d Elmer
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```
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Print CUPS's test page:
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```
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lp -d Elmer /usr/share/cups/data/testprint
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```
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Inspect or cancel queued jobs:
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```
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lpstat -o Elmer
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cancel -a Elmer
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```
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The printer language choice is based on Ricoh's published
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[MP C3002/C3502 specifications](https://assets.ricoh-usa.com/j2jqn9lauv41/1CzJla6qwny2d9oBVHHlID/5bfa366a01cf82162ea24287f99c8af9/aficiompc3002.pdf).
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## What the teacher sees
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The queue is `Elmer`, its Description is `Elmer`, and its **Location is
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deliberately blank**. CUPS prints the Location under the queue name in
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every print dialog, so anything there becomes a second line the teacher
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has to read past. The printer's teacher-facing identity is one word.
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`classroom-printer-setup` enforces this idempotently, and its
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already-configured check includes the Location, so a machine set up
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before this change is corrected on the next run rather than being left
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alone as "close enough".
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lpstat -l -p Elmer # Description: Elmer, Location: (blank)
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lpstat -p -d # Elmer, and the system default
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lpstat -e # Elmer, and nothing else
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