Paste previously flattened everything to plain text (the signed import
doctrine deferred rich paste). Now the editor parses clipboard text/html
into the V2 model, the inverse of serialize-html.ts:
- parse-html.ts: parseWordsHtml(domRoot) -> WordsBlock[]. Maps p / h1-6 /
blockquote / pre / ul-ol-li (incl. checkboxes) / hr / img / figure /
table, with inline marks (bold/italic/underline/strike/code, colour +
background from style) and links. URLs sanitised; unknown blocks fall
back to a paragraph, unknown inline tags are transparent.
- insert-blocks.ts: insertBlocks(state, blocks) drops blocks at the caret.
Single pasted paragraph inline-merges (a phrase stays in the sentence);
multiple/block-level paste splits the host; a nested or non-inline caret
degrades to a structure-preserving plain-text insert; a trailing
paragraph guarantees a caret home after a terminal table/image. New
insertBlocks command + dispatch.
- provider onpaste: parse text/html in an INERT document
(createHTMLDocument off the active dom — no scripts run, no resources
load), then applyCommand insertBlocks. Image-files / single-URL /
plain-text paths unchanged; plain text is still the fallback.
Tests: insert-blocks 6/6 (merge/split/replace/append/no-op), parse-html
10/10 browser (marks, lists, tables, colour, javascript: URL sanitised).
Browser-verified: pasting an h2 + a bold/italic paragraph + a list inserts
the heading, the formatted paragraph and the list at the caret. Updated
the provider's unsupported-paste test (real HTML now parses; only
content-free fragments log unsupported-html).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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