Yes please yes please yes please yes please!!!

I believe the quick spine labels just break on spaces. You can add a lot of logic using JS and CSS, but that's quite painful.

Using the splitting rules makes a lot of sense here, I'll mark bug 32021 as a duplicate of this, as the general problem is the splitting rules not being used.

*** Bug 23021 has been marked as a duplicate of this bug. ***

We've just had someone on IRC ask about this. https://irc.koha-community.org/koha/2023-08-01#i_2501434

They had a label printer and wanted to use the quick spine label creator to print the spine labels with a specific splitting rule.

Test plan :
1. Create a splitting rule that splits on periods and spaces
   1.1. Go to Administration > Classification configuration
   1.2. Click 'New splitting rule'
   1.3. Fill out the form
        - Splitting rule code: TEST
        - Description: Split on period and spaces
        - Splitting routine: RegEx
        - Regular expression: s/\s/\n/g (click 'New' to add a second regex) 
                              s/\./\n\./g
   1.4. Optionally, test the regex by entering a call number, e.g. 822.33 H521
        It should be split as follows

        822
        .33
        H521

   1.5. Click 'Save'

2. Add this splitting rule to the Other/Generic Classification Scheme
   2.1. In Classification sources, click 'Edit' next to Other/Generic Classification Scheme
   2.2. Edit as follows
        - Source in use: Check
        - Splitting rule: Split on period and spaces (TEST)
   2.3. Click 'Save'

3. Create or edit an item to add a call number
   3.1. Find or create a record
   3.2. Edit or create an item
   3.3. Edit/Create the item as follows
        - 2 - Source of classification or shelving scheme: Other/Generic Classification Scheme
        - o - Full call number: 822.33 H521
        - p - Barcode: enter a barcode, note this down, you'll need it later
        - y - Koha item type: fill this out if it's not already
   3.4. Click 'Add item' or 'Save changes'

4. Print a quick label
   4.1. Go to Cataloging > Quick spine label creator
   4.2. Enter the barcode of the item and press Enter
        --> The call number is not split according to the rule

The regex rules don't work, but there is a lot of mark-up useful for splitting with jQuery and CSS if you have a look at how it presents in HTML.

I was able to follow the test plan on a sandbox!  I needed to enable the SpineLabelShowPrintOnBibDetails syspref, and to make the Other/generic... classification source "in use."

When I followed the test plan with the regex and tested the regex (when adding the splitting rule) the call number split correctly.  But after putting that exact same call number into an item record and trying the "spine label" button in the "Normal" display of the bib record to quick print a spint label, the call number did not split, even though I had configured the Other/generic to use the TEST splitting rule.

So, does that help?  Is there something else to do/test?

Cheerio!
h2