Alignment of ruby text is affected by -epub-text-align-last

[yuanshuai0217]

• KOReader version: 2024.04
• Device: moaan mix7 (with Android 11)

Issue

The alignment of ruby text is affected by -epub-text-align-last, which is not preferred, as according to JLREQ, ruby text shall be always center-aligned.

Steps to reproduce

This is a MWE file: test_ruby.zip

Ruby text get left aligned, which should be centered instead:

Deleting -epub-text-align-last: left from CSS can make it return to normal.

[poire-z]

I probably forgot about it in https://github.com/koreader/crengine/blob/1a9e79e25a5b4510d7aaff238d5239f2da70d8d0/cr3gui/data/html5.css#L240-L256 :)

You could (not sure you can on Android) add a line to koreader/data/html5.css:

--- a/data/html5.css
+++ b/data/html5.css
@@ -243,6 +243,7 @@ sup {
 ruby {
   display: ruby;
   text-align: center;
+  text-align-last: initial;
   text-indent: 0;
 }
 rb, rubyBox[T=rb] {

Seems to do the trick:

You could add it to a user/book style tweak if you want to solve your issue today:
ruby { text-align-last: initial }

(Minor issue, so it will wait a bit before reaching KOReader.)