The reflowable adjust (objective 9) had no fixed-layout counterpart: the
popover's Adjust button relied on adjustContext, which is only stashed by
the reflowable show-annotation path, so PDF rows showed a button that
silently did nothing. PDF highlights persist as page-fraction rect
payloads ({v:1,page,rects}), so their adjustment is geometry, not range
re-anchoring.
- startAnyAdjust routes the popover button by format; startPdfAdjust
runs a rect-edge session: 4 grips per rect (all edges, one rect per
drag), live preview through the renderer's own addRectAnnotation
(replace-by-key — no fork change), commit via saveHighlightChanges.
- Snap vocabulary mirrors snapBoundary: maximal letter runs are atomic
tokens (start edge takes the word start, end edge the word end), each
punctuation glyph is its own token with both edges grabbable (a period
or line-break hyphen can be taken or shed precisely). Horizontal edges
snap to line top/bottom bands (own line + neighbours).
- selection_text is recomputed from the glyph boxes inside the final
rects (reading order, lines joined with spaces) so the stored text
stays honest with the extent.
- Cancel paths mirror the reflowable session: page turn (renderer
relocate) discards and restores; a committed session skips the restore.
- getContents() from the fixed-layout renderer carries no index — page
iframe docs are mapped through a WeakMap filled by the view's load
events. Pointer mapping goes through the canvas's post-transform rect
(the dpr denominator lesson) via the fork's own convertPoint ratios.
- pdfCharBoxes dedupes by box key: pdf.js re-renders append a second
span set into the same .textLayer without clearing, and undeduped
glyphs doubled the recomputed text.
Device-verified (emulator Chrome + CDP): popover route, grip placement,
word-atomic shrink ("But this" -> "this"), extension to the exact
line-break hyphen boundary (0.8777), far-drag clamp at the last token,
page-turn cancel, and the reflowable adjust still routing to handles.
John O'Keefe
4d1fb05e49