* fix: Block math not closed by trailing $$ on a content line
The closing delimiter check compared a 3-character slice against the
2-character "$$" delimiter, so block math closed on the same line as
content (e.g. "c = d$$") was never detected and the block swallowed the
rest of the document. Use the delimiter length rather than a hardcoded
slice. Also fix the indexOf sentinel comparison (!== 1 instead of
!== -1) in inline math parsing, which terminated correctly only by
coincidence.
Adds tests for the math markdown rules and moves the findNodes test
helper into shared/test/editor for reuse.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* fix: NaN width and height parsed for video and image nodes
Video parseDOM and parseMarkdown used parseInt on a missing attribute,
storing NaN instead of null and persisting it to markdown as NaNxNaN.
Image size syntax with a missing dimension (e.g. "=x100") hit the same
issue through optional regex groups. Parse dimensions only when
present, matching the existing guard in Image parseDOM, and correct the
video getAttrs element type.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* fix: Normalize non-numeric video dimensions, avoid serializing nullxnull
Review feedback: parseInt could still produce NaN when the attribute
exists but is not numeric (e.g. width="auto"), and toMarkdown wrote
null dimensions as "nullxnull". Parse dimensions through a helper that
normalizes non-finite values to null, and serialize nullish dimensions
as empty strings, which still round-trips as a video node.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* test
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Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Tom Moor