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* M7: preserve Arabic text order when copying and editing Record per-line ActualText for shaped added text and preserve its logical order in Edit text. Cover mixed scripts, marks, copy/search, retyping and save/reopen; retain the drawing golden. Assisted-by: Codex * Edit text: keep only right-to-left ActualText out of line joining and bidi recovery Word and Chrome wrap Latin ligatures in /ActualText spans mid-word; splitting lines at every span broke such words into pieces in Edit Text. Only spans whose ActualText has strong right-to-left characters keep their own line and typing order now. Regression: a Latin fi ligature span stays on its line. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: Brandon Thomas <echelon@gmail.com> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
57 lines
4.1 KiB
Markdown
57 lines
4.1 KiB
Markdown
# Editing existing text and source subsets
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Click a text region in **Edit a PDF → Edit text and images**. One editor contains its
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source rows and mixed styles. Embedded TrueType and OpenType/CFF faces are used in memory;
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source font programs, colour, size and baseline anchors stay intact. A textless preview
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prevents a second copy underneath. The frame shows the live extent as text grows or shrinks.
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A subset font contains only some of the original face's glyphs. A new character cannot be
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reconstructed from a glyph the PDF does not contain. **Load font…** imports an openly licensed,
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embeddable standalone `.ttf` or `.otf` face. **Installed fonts…** discovers eligible user-installed
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faces on request, off the UI thread; the document-font menu selects resources already on the
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page. Select **Keep source fonts** to preserve each run's original face. A matching full face
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completes its subsets automatically, including new Chinese characters. Choosing another face
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is explicit. Fonts with restricted embedding, unsupported collections, excluded families or
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no open-licence declaration are refused. Interface fallback fonts are never exported.
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The full selected program, glyph mappings, widths and Unicode text are embedded in the PDF.
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Saving and reopening therefore needs no locally installed font. Original subset bytes are
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preserved. Optional matching faces from `CRAFT_FONTS_DIR` can also complete source subsets;
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this works only when that build input actually contains the full face. This change does not
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add a font binary or change the release font pin. Fonts shared by releases belong in
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`storytold/craft-fonts` under the repository's asset rules.
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Select text within the editor before changing size, colour, font, underline or spacing to
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format that selection. Automation supports up to 1024 disjoint UTF-8 byte ranges with the
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same properties; invalid or overlapping ranges fail atomically. Untouched source formatting
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survives. OpenType shaping uses the selected/source face's substitution and positioning
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rules, preserves marks and ligatures, and applies Unicode bidi ordering for a single face.
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Logical text remains available after save/reopen through ToUnicode and ActualText.
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Added Arabic text records ActualText per shaped line for copying and searching in typing order.
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ActualText already supplies typing order, so the editor preserves it without applying
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a second bidi reversal; adjacent visual glyph runs still recover their own reading order.
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Only right-to-left ActualText is kept apart this way: left-to-right spans, such as the Latin
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ligatures (`fi`, `fl`) Word and Chrome wrap in ActualText mid-word, join their line as before.
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For headless editing, use `text_font_files` → `text_font_import` → `text_fonts` and pass a
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resource to `text_edit.font_resource`. `text_edit.ranges` holds selected range formatting.
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`text_edit_layout` accepts resource/ranges too and measures a draft without applying it.
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All file inputs respect CLI root confinement; importing a font and applying text are undoable.
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Explicit marked paragraph/heading scopes prevent unrelated tagged regions from merging.
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Compatible geometry groups untagged content, including runs split across content streams
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or equivalent graphics transforms. Geometry cannot infer author intent in every untagged
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PDF. Semantic structure-tree preservation, legacy Type 1/Type 3 inline font preview,
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font collections/variable-font instances, mixed-font/style contextual runs and complete rotated
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layout fidelity still need broader coverage. Do not interpret the passing real-file checks
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as a guarantee for every PDF.
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Private acceptance tests are opt-in and keep inputs unmodified. They exercise actual Chinese
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keyboard insertion/deletion on all four pages, source-face/baseline checks and identical
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in-memory renders before and after saving/reopening. Synthetic tests cover full TrueType
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mapping, OpenType/CFF, Arabic marks/ligatures/mixed bidi, repeated edits, disjoint styles,
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invalid ranges, font selection and root confinement. CLI acceptance repeats insertion/deletion
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and two saves/reopens on four pages; independent PDFium checks extraction and rendering.
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No private document, font or screenshot
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is included in the repository.
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