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Anthony Stirling
2025-11-12 10:16:36 +00:00
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11 changed files with 109 additions and 109 deletions
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docs/pdf-json-editor-backlog.md → docs/pdf-text-editor-backlog.md
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# PDF JSON Editor Backlog
# PDF Text Editor Backlog
- **Type3 Font Support (Text Additions)**
- Parse Type3 charprocs to extract glyph outlines, build a synthetic TrueType/OpenType font (FontTools, Ghostscript `ps2ttf`, etc.), and store it in `webProgram` / `pdfProgram` for client use.
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- **Editor UX Safeguards**
- Mark groups using fallback glyphs so the UI can warn about possible appearance shifts. Font family matching is now implemented (Liberation fonts), but weight matching is still TODO, so bold/italic text using fallbacks may appear lighter than original.
- Surface when Type3 conversion was downgraded (e.g., rasterized glyphs) and limit editing to operations that keep the PDF stable.
- Reference: `frontend/src/proprietary/components/tools/pdfJsonEditor/PdfJsonEditorView.tsx:1260-1287`
- Reference: `frontend/src/proprietary/components/tools/pdfTextEditor/PdfTextEditorView.tsx:1260-1287`
- **Canonical Font Sharing**
- Emit fonts once per unique embedded program. Add a `canonicalFonts` array containing the full payload (program, ToUnicode, metadata) and a compact `fontAliases` mapping `{pageNumber, fontId, canonicalUid}` so text elements can still reference per-page IDs.

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docs/pdf_json_type3_fonts.md
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## Overview
The PDF JSON editor needs to handle **Type3 fonts** - custom vector fonts embedded in PDFs that don't follow standard font formats. These are common in PDFs generated by Matplotlib, LaTeX, scientific papers, and presentation tools.
The PDF Text editor needs to handle **Type3 fonts** - custom vector fonts embedded in PDFs that don't follow standard font formats. These are common in PDFs generated by Matplotlib, LaTeX, scientific papers, and presentation tools.
When converting a PDF to JSON for editing, Type3 fonts present two challenges:
1. **No Unicode mapping** - Character codes don't map to standard Unicode characters
@@ -430,8 +430,8 @@ Output shows all Type3 fonts with their signatures and glyph coverage.
- `PdfJsonFontType3Glyph.java` - Model for Type3 glyph data
### Frontend (TypeScript)
- `pdfJsonEditorTypes.ts` - Type definitions for JSON structure
- `pdfJsonEditorUtils.ts` - Font handling utilities
- `pdfTextEditorTypes.ts` - Type definitions for JSON structure
- `pdfTextEditorUtils.ts` - Font handling utilities
### Resources
- `type3/library/index.json` - Font library metadata