Legacy form fields are drawn: check boxes, and drop-downs' selected entry (#2076)

* Legacy form fields are drawn: check boxes, and drop-downs' selected entry

Legacy form fields keep their w:ffData since the last round, but were
not drawn: a FORMCHECKBOX has an empty result, so a form of check
boxes came out with none, and a FORMDROPDOWN showed its saved result
rather than its selected entry.

- wordcraft-doc: `legacy_form` reads what layout needs from the kept
  w:ffData (kind, name, check box state and size, drop-down entries and
  selection, text field length); `InlineObject::legacy_form()`.
- wordcraft-layout: a check box takes the text line's height of room
  and is drawn as Word draws it; a drop-down shows its selected entry
  (w:result, else w:default, else the first).

Measured on Word's PDF export with a synthetic document (Calibri):

  text size | Word square | WordCraft
  8 pt      | 7.44        | 7.45
  10 pt     | 9.96        | 9.89
  12 pt     | 12.36       | 12.33
  20 pt     | 22.08       | 22.09
  w:size 15 | 16.08       | 15.99

The square sits 1.16 pt inside the line height on every side (room on
the line within 0.2 pt of Word's), has a 0.72 pt border and, checked,
an X from corner to corner in 0.48 pt lines; w:checked beats
w:default. docs/file-format-parity.md is updated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Draw::Shape takes the dash list main added

---------

Co-authored-by: Daniele Mori <Dinasty@hotmail.it>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>

docs/file-format-parity.md

@@ -83,7 +83,7 @@ Measured by grepping `crates/docx/src/read` and `src/write` for the OOXML elemen
 | Move tracking (`w:moveFrom`/`w:moveTo`, `w:moveFromRangeStart/End`, `w:moveToRangeStart/End`), moved paragraph marks | ✅ | ✅ | #400: both ends linked by the range name; ranges rewritten around each moved stretch (ids renumbered); a move missing an end or a range end opens as a plain deletion/insertion. ODT/PDF export the result (moved-away text hidden like deletions); RTF writes a move as a plain tracked deletion and insertion |
 | Content controls (`w:sdt`) | ✅ | ✅ | Block, inline, row and cell level, nested; title, tag, id, lock, placeholder, temporary, rich/plain text, `w14:checkbox`, combo box, drop-down list, date, picture, building block gallery, `w15` repeating sections; other `w:sdtPr` children (data binding, appearance) kept verbatim (#381). A TOC's control is rebuilt by the TOC. Replace All respects content-edit and control-deletion locks and refuses a batch before making any edit |
 | Restrict Editing (`w:documentProtection` edit/formatting/enforcement and password hash, `w:locked` styles, `w:permStart`/`w:permEnd` exceptions) | ✅ | ✅ | #412: SHA-512 hash with salt and spin count written; Word's legacy `w:cryptAlgorithmSid`/`w:hash` form (SHA-1/-256/-384/-512, ECMA-376 Part 4 §14.8.1) is kept and verified; MD2/MD4/MD5, `w:algIdExt` and other unsupported forms are refused, never unlocked; `w:colFirst`/`w:colLast` table-column ranges read as plain ranges; forms mode (`w:edit="forms"`) lets edits inside fillable content controls (`w:lock` content-editable, innermost wins) run, everything else rolls back; row-wrapped controls and control deletion remain refused; `review.restrict` reports `formFields`; Find Next Region covers form fields (the pane button shows for forms documents); under active protection, `developer.properties` refuses `lockEdit`/`lockDelete` changes — as Word blocks property edits until Stop Protection — while other properties (title, tag, placeholder…) stay editable |
-| Legacy form fields (`w:ffData`), check boxes, drop-downs | ❌ | ❌ | |
+| Legacy form fields (`w:ffData`), check boxes, drop-downs | 🟡 | ✅ | The field definition is kept raw and saved back. Check boxes (`FORMCHECKBOX`) are drawn as Word draws them: a square as tall as the text's line, inset 1.16 pt, 0.72 pt border, an X when checked (`w:checked`, else `w:default`), `w:size` honoured; drop-downs (`FORMDROPDOWN`) show their selected entry; text fields (`FORMTEXT`) show their result. Not yet: filling them in, Protect Document's forms mode for legacy fields |
 | DrawingML pictures inline and anchored (`wp:anchor`), wrap square/tight/through/top-bottom | ✅ | ✅ | Tight/through read and written with their `wp:wrapPolygon` (and `edited`); without one, a shape's outline is written (a picture's rectangle). `wrapText` (both sides, left, right, largest) read and written for square, tight and through |
 | WordArt text effects (`w14:textFill`, `w14:textOutline`, `w14:shadow`, `w14:glow`, `w14:reflection` in `w:rPr`) | ✅ | ✅ | Solid, gradient (linear) and no fill, outline colour/width, shadow, glow, reflection (#416); `w14:scene3d`/`w14:props3d` dropped |
 | Legacy font effects (`w:outline`, `w:shadow`, `w:emboss`, `w:imprint` in `w:rPr`) | ✅ | ✅ | Drawn on screen and in PDFs as Word's PDFs show them (#2534): hollow outlined letters; a sharp grey copy down-right (shadow, emboss) or up-left (imprint); WordArt effects on the same run win; tracked insertions and deletions keep them. Not drawn on colour emoji, or on top-to-bottom text with upright East Asian characters. Emboss and imprint are approximations (no highlight edge) |
@@ -354,3 +354,4 @@ Imported text fields use the first nonempty cached result run's formatting on th
 | 2026-10-12 | trivial | Recipient lists: legacy .xls workbooks and GBK/Big5/Shift_JIS/UTF-16 CSV/TXT (#778); plain-text import detects legacy encodings too |
 | 2026-10-15 | trivial | DOCX: runs mixing right-to-left and left-to-right text are split by direction on save; right-to-left pieces get `w:rtl` and `w:lang w:bidi`, so Word shows the order WordCraft shows (#1543) |
 | 2026-10-16 | trivial | DOCX: OpenType ligatures (`w14:ligatures`) read and written in runs, styles and document defaults |
+| 2026-10-15 | trivial | Legacy form fields are drawn: check boxes as Word's squares (checked with an X), drop-downs with their selected entry |