PDFs have fully searchable text (pdf.js text layer) — the previous
reflowable-only gate existed only because foliate's generic search
needs DOM documents that PDF sections don't provide. This adds a PDF
pipeline alongside it:
- Fork d065495 exposes the pdf.js document proxy as book.pdf so the
host can drive text extraction directly.
- New web/src/reader/pdf-search.ts: extractPdfPages() pulls each
page's textContent with item geometry (progress-reported, cached
after first search). PDF text items often omit inter-word spaces
(gaps are positional), so pages are joined gap-aware — baseline
changes, hasEOL, or horizontal gaps past a font-size threshold
become spaces — recording a char→item map. searchPdfPages() does
case-insensitive matching over the joined text and maps each hit
back to the page-fraction rects of the items it spans, with
ellipsized pre/match/post excerpts. Pure functions, unit-sanity
checked (cross-item 'brave new' → two rects).
- runSearch branches: EPUB keeps foliate's DOM search; PDFs search
the extracted pages, group hits per page ('Page 12'), and render
on-page hit rectangles through the existing fraction-rect overlay
(addRectAnnotation) — which re-render automatically when pages
revisit, same as highlights. Clearing the query removes them.
- Results navigate by page index; the 🔍 button and '/' shortcut now
appear for PDFs too (comics remain without searchable text).
john-okeefe
6fc4107e3c