mirror of
https://github.com/navidrome/navidrome.git
synced 2026-08-01 07:21:17 +00:00
13e96a0e81
* fix(lyrics): correct TTML background-vocal cue timing and whitespace Two parsing defects surfaced by Apple Music TTML files that mix a main vocal with an x-bg (background) span group within the same line: - Cue end-time normalization ran over the whole line's cue list in document order. Background cues are stored after the main cues but interleave earlier on the timeline, so the next-cue clamp collapsed the last main cue's end down to its own start (start == end). End times are now normalized per agent group, matching how the Subsonic serializer already groups cues, so parallel layers no longer corrupt each other. - Whitespace between elements was treated as significant: pretty-printed (indented) TTML injected spurious newlines into the line text, turning one line into many. Per TTML2 default xml:space handling (linefeeds treat-as-space, whitespace-collapse), formatting whitespace now collapses to a single space and hard line breaks come only from <br/>. The line-level value and per-agent cueLine.value remain the full line text, as required by the OpenSubsonic songLyrics v2 contract; the per-agent text is carried in each cueLine's cue[] array. Two existing tests that encoded the buggy newline-as-break behavior are corrected; new tests cover whitespace collapse, <br/> preservation, and interleaved background cue timing. * fix(lyrics): only collapse XML whitespace, preserve other Unicode spaces Whitespace collapsing used unicode.IsSpace, which matches more than the XML S production (space, tab, CR, LF): it also folds characters like NBSP and U+3000 into a regular space, silently altering content. Restrict collapsing to the four XML whitespace characters so other Unicode spaces pass through unchanged, and add a regression test. Also clarify the doc comment that collapsing is applied unconditionally (xml:space="preserve" is not supported).