feat(pdf): add read-only source-content classifier (#33) - #97
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nonamexishere wants to merge 7 commits into
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feat(pdf): add read-only source-content classifier (#33)#97nonamexishere wants to merge 7 commits into
nonamexishere wants to merge 7 commits into
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Inspect the original source path and list existing text and image occurrences with unrotated PDF-space bounds, an opaque locator, and a supported/unsupported reason. Does not write a dest or edit page operators. Fixes McanKul#33.
Treat 180° text as ROTATED_TEXT, advance Tm after each show, refuse only applied signatures (not empty /FT /Sig widgets), keep operators after BI…EI, and scale text bounds by Tm×CTM.
Replace the same-agent fold with independently authored R1–R5 tests and a walker that does not edit those tests. Behavior is the same: 180° ROTATED_TEXT, Tm advance, empty Sig widgets, leftover ops after BI…EI, and Tm×CTM text bounds.
Strip only ID…EI payload so BI sees the live CTM. q/Q restores font metrics and Tc/Tw (not Tm/Tlm). Tc/Tw advance consecutive shows. Drop the fixture-history parenthetical on is_rotated_tm.
Indirect /Widths arrays are followed instead of falling back to Helvetica. Named and array Pattern color spaces refuse as PATTERN. ExtGState /SMask (not /None) marks following paints MASKED_IMAGE.
PDF cm / Form Matrix / Td / post-show Tm use mul(current, operand). Stacked cm now maps a unique image to (72, 400) 40×40; a scaled Tm plus a second Tj advances by 12× text-space width. Trm is unchanged.
Insert a newline between decoded /Contents chunks so Tj+ET cannot fuse into TjET. A two-stream page now lists both Hi and Lo.
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Summary
pagePdfpreview extract) and lists existing text and image occurrences.EditObject.rect), an opaque locator tied to a whole-file fingerprint, kindtext|image, andsupportedorunsupportedplus a specific reason code.DoisNESTED_FORM(real kind and bounds, never independently mutable).supportedmeans structurally classifiable for a later mutate loop. It is not a Save affordance and is not cover-and-overlay.Fixes #33.
Why
Spike #11 needs a machine that can emit explicit unsupported reasons before anyone opens a production “edit existing text/image” issue. Overlay stamps and
#34’s surviving source digest are not that machine. This is the#32corpus classifier only: no dest write, no PDFium, no Edit PDF UI.Validation
npm run buildnpm test(283)npm run typecheckcargo test --manifest-path src-tauri/Cargo.toml --lib(237, including 31source_contenttests)Privacy Checklist