forms (L3) gained a dev-dependency on render (L3) with #516, which
`xtask layers` refuses, so main CI failed. The one test that renders a
rotated field now lives in engine's tests, which may depend on both;
the parity evidence points there.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* M5: draw all ten PDF line-ending styles
Imported lines, polylines and callouts kept Square, Circle, Diamond, Butt, Slash and reverse arrows in /LE but would not redraw them. Those styles now draw, and comment_add and Comment properties can set them.
* hu, uk: Line ending
---------
Co-authored-by: Brandon Thomas <echelon@gmail.com>
The export model (`pdfcraft_export::Block`/`Cell`) had no colour, so
`export_pages` dropped the fill colour that `edit::TextBlock` already
carries and every run came out black.
Block and Cell now carry an sRGB colour, mapped from TextBlock.color.
Word runs get `<w:color w:val="RRGGBB"/>`, HTML paragraphs, headings and
cells a `style="color:#RRGGBB"`, and RTF a colour table with `\cfN`.
Black text keeps each format's default; NaN and out-of-range components
clamp.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Refs #434 (partial). Preserve displayed bounds and standard appearance orientation through stamp edits; image signatures and explicit rectangles remain outside this fix.
Assisted-by: OpenAI GPT-6.1 (gpt-6.1-sol)
Co-authored-by: Brandon Thomas <echelon@gmail.com>
* M5: comments without an appearance stream are drawn (display only, never saved)
#260 (page 7): a FreeText box with /DA and an orange /C background, a
Text note and an Ink stroke, all without /AP, were not drawn; Acrobat,
MuPDF, PDFium and Poppler draw them. The renderer only draws /AP (plus
the Highlight fallback of #274), and pdfcraft-annot, which already
draws all of these for PdfCraft's own comments, can't be used from the
renderer (both are L3).
pdfcraft_annot::with_missing_appearances returns a copy of the document
in which every annotation without /AP /N that appearance::build can
draw (FreeText, Ink, Text, FileAttachment, stamps, shapes, lines,
markup, …) has the appearance build draws from its dictionary; links,
form fields and pop-ups are left alone, as is anything build declines.
The engine keeps that copy, written as an in-memory incremental update,
in a new Document::display: the page view's render pool, page_render
and page images (export_source) read it. Document::bytes, what Save,
signatures and the inspector use, is unchanged. display is rebuilt
wherever the renderer was (open, refresh, scoped refresh) and is bytes
itself when nothing is missing or the document can't be edited.
Tests: annot tests::comments_without_appearances_get_one_for_display_only
(FreeText, Ink and Text get /AP /N in the copy, an existing /AP is kept,
Link, Widget and an unknown subtype aren't touched, the original is
untouched, none means no copy) and engine
tests::comments_without_appearances_are_drawn_but_not_saved (the page
view draws the FreeText background and the Ink stroke, before and after
an edit; the working bytes stay the opened file; Save writes no /AP).
On main the page view shows white where the FreeText box is. Parity:
view.render-annotation-appearances cites the test and notes what's left
(Link borders without /AP, printing).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* Test the Ink stroke on its apex row: Ink is now a curve through its points (#374)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>
* M11: Optimize PDF and Reduce File Size run in the background with a progress bar
Advanced optimization and Reduce File Size did all their work on the UI
thread, so on a large file the window stopped repainting until they were
done and looked as if it had crashed.
- pdfcraft-optimize: optimize_with_progress reports each image and the
clean-up; returning false stops with OptimizeError::Cancelled.
- engine: Session::optimize_job captures a copy of the document and the
choices; OptimizeJob::run reports each OptimizeStage (removing user data,
images, cleaning up, merging, writing), stops on request with
EditError::Cancelled and turns a panic into an error so a worker always
reports back. optimized_bytes is the job run in place.
- ui: both commands run the job on a worker thread (inline in tests and on
the web), like OCR and Export. A card at the bottom centre shows the
stage ("Optimizing... image 14 of 40"), a bar that eases towards the
fraction with a light sweeping across it, the percentage and Cancel;
notices stack above it. A second run is refused while one is going. The
control channel's state includes the progress.
The headless doc_optimize and doc_reduce tools stay synchronous. New
strings are translated for es, fr, ja, zh-hans, zh-hant.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* Clippy: as_chunks in the signature image background test (follow-up to #355)
#360 switched the image test to as_chunks; #355 added another chunks_exact(4)
in the background test, which clippy's chunks_exact_to_as_chunks rejects.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* Optimize: report a failed worker spawn instead of waiting forever
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>
* M10.2: create PDF from multiple files
Create a PDF ▸ Multiple files takes PDFs, images and .txt files, lets the
user reorder them, and makes one combined PDF (a bookmark and an optional
page range per file) or one PDF per file in a chosen folder, never
overwriting what is there.
- create: source_kind() tells PDFs, images and text apart (moved from the shell)
- engine: Session::convert_to_pdf, shared by Open, the dialog and the tool
- automation: doc_create_multiple (combine or separate)
- ui: Multiple files dialog reusing the Combine files list; translations
- parity entry and ROADMAP updated; catalog hashes refreshed
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* M10.2: multiple files open in the page grid; insert files at any gap
Create a PDF ▸ Multiple files now opens the picked files as one unsaved
document in the Organize page grid instead of a file-list dialog: pages
are removed and reordered there, and Save pages writes what is shown.
- grid: a "+" at every gap inserts files right there; Save pages button
- insert from file: several files in order, images and text converted,
inserted pages selected
- the file-list dialog is removed; one PDF per file stays in the
doc_create_multiple tool
- translations, catalog hashes, parity notes and ROADMAP updated
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* M4: insert files by dropping them on the page grid
On desktop, PDFs, images and .txt files dropped on the Organize page grid
are inserted at the gap under the pointer, in order, and selected; a
dropped file still opens as a document everywhere else.
winit does not report the pointer while files are dragged over the
window on every platform, so a drop waits (up to a second) for the
pointer to show up and otherwise appends at the end.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* M4: files dragged over the page grid follow the pointer (macOS)
winit sends no pointer moves while files are dragged over the window, so
egui kept the place the pointer entered at: the insertion bar froze there
and the files were inserted there. During a file drag the pointer is now
read from AppKit (safe objc2 calls, crates already in the tree) and fed
to egui, so the bar and a "+" badge follow the pointer and the files go
where they are released.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>
* M4: Combine files in its own tab, with a sortable table and unlocking of protected files
Combine files was a modal dialog with a cramped list and up/down buttons on
every row. It is now a tab next to Home and the documents, showing a table
of the files: File name | Pages | Size | Modified | Warnings.
- Columns sort when their heading is clicked (anywhere in the cell; again to
reverse; names in natural order), resize from their edges and move by
dragging the heading. Order and widths are kept in the settings; a
right-click on a heading resets them.
- Rows select like a file manager (click, Ctrl/Cmd+click, Shift+click,
Shift+arrows, Ctrl/Cmd+A). One toolbar moves, removes and unlocks the
selection; Alt+arrows and dragging move it too. Every change to the list
undoes and redoes with Cmd/Ctrl+Z (also toolbar buttons).
- Add files, Add folder, Add folder and subfolders (a split button), Add open
documents, or drop files and folders on the tab.
- Problems show before Combine: password-protected files, security settings
that withhold page assembly, page ranges (checked as typed, with the pages
they take), duplicates. Files that open but are protected say that the
combined file won't keep their security; the result is never encrypted.
- Unlock... asks for a file's open or permissions password (one password can
be tried on several files). Passwords stay in memory, are never printed,
and reach the engine through combine_unlocked; doc_combine takes them as
`passwords`. The engine decides whether a password works, since the
inspector rejects some it accepts (RC4 owner passwords).
organize.combine-sort is shipped and organize.combine-options partial
(include open files). Strings are translated for es, fr, ja, zh-hans, zh-hant.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* Credit Marlon Konrad (mlkonrad) in the About window
Adds my own entry to contributors/people.toml, as docs/contributors.md asks.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>
* XFA: run FormCalc scripts
A FormCalc interpreter (XFA 3.3 part 8) in the js crate, over the same
form table, effects and budgets as the XFA JavaScript model, so the
engine runs both languages alike: expressions and FormCalc coercions,
var, if/while/for/foreach/func, accessors ($, $host, $form, $record,
$layout, $event, xfa., .., [n], [*], _name instance managers) and the
arithmetic, logical, string, date/time, financial and unit built-ins.
Get/Post/Put refuse.
The JavaScript model's XHost, HNode, SOM resolution and instance
operations are shared (pub(crate)) with Context-free add_instance and
remove_instance that the boa wrappers call.
Bounded like the JavaScript path: steps, loop iterations, recursion,
parse depth, string and list sizes, clamped dates, the instance cap,
and the per-activity time budget with abandonment.
Tests: language, built-ins, control flow, form objects and hostile
scripts in the js crate; a FormCalc fixture form in the engine that
initializes, calculates, validates, adds and removes rows, shows a
subform and round-trips through save; hostile scripts at the engine
level. parity form.xfa-formcalc planned -> partial.
Hardened after two adversarial review passes: statement nesting and
chain length count against the limits (verified on a 1 MiB stack), the
script honours the engine's deadline itself, strings are capped after
every built-in and messages/values clipped and noted (shared host),
lists hold each object once and the shared SOM resolver deduplicates,
values go into fields only (shared host, JavaScript too), saturating
Stuff and time arithmetic, FormCalc-specific size check instead of the
JavaScript refuse scan. Semantics: bare row[*] and row[n] from inside a
row see every row, relative [-n]/[+n] indexes, Count of non-null,
Parse with a date picture gives the ISO date, assignment is an
expression.
* form.xfa-formcalc: bound FormCalc values, results, errors and copying (#301 review)
- XHost::set_value cuts a value to 64 Ki chars before storing it, so later
reads match what is saved and the snapshot stays bounded.
- A script's completion value (calculate result) is cut to 64 Ki chars with a
note, in both the FormCalc and the JavaScript paths.
- throw clips its value like any message.
- Copying, dereferencing and comparing long strings is charged to the step
budget (len/256), so wasm (no clock) can't spend unbounded time on it;
OneOf charges per comparison.
- Exists propagates step/deadline/depth/size limits, answering 0 only for
lookup failures.
- IPmt/PPmt charge a step per period.
- The parser counts each top-level expression's chain from zero, so an
elseif condition no longer inherits the previous arm's count.
- Comment on the interpreter's depth limit fixed; parity notes say memory
isn't capped and Uuid/Date/Time are deterministic on wasm.
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>
* Layers: run set-layer-visibility actions, keeping radio-button groups
The engine can apply a set-layer-visibility action (SetOCGState,
ISO 32000-2 §12.6.4.13) to a document's layers: each ON, OFF or Toggle
in order, naming the layer by its optional content group, so a toggle
sees the state the changes before it left. With /PreserveRB (the
default), a layer turned on turns off the other layers of its
radio-button groups, now read from /OCProperties /D /RBGroups; turning
one off leaves them alone. The renderer is rebuilt once per action, not
once per layer.
Like the Layers panel, this changes the view, not the document.
Tests: engine set_layer_actions_toggle_in_order_and_keep_radio_groups
and set_layer_actions_change_what_renders (pixels before and after),
render radio_button_layer_groups_are_read.
* Links: run set-layer-visibility actions
Clicking a link whose action is SetOCGState showed "SetOCGState actions
run in the JavaScript engine (M6)" and did nothing. Links now read the
action (/State, also when indirect, and /PreserveRB) and clicking runs
it; the Layers panel follows. Hovering shows "Set layer visibility"
(translated in the ja, es, zh-hans and zh-hant catalogs), and doc_info
describes the action in its link list.
Tests: render links_read_set_layer_actions, automation
doc_info_describes_set_layer_links and ui-egui
links_set_layer_visibility.
* Forms: push buttons run set-layer-visibility actions
A push button whose mouse-up action is SetOCGState counted as having no
action, so clicking it did nothing. Buttons now read the action as
links do, and clicking runs it.
Tests: forms push_buttons_read_set_layer_actions and ui-egui
push_buttons_set_layer_visibility.
parity: edit.action-set-ocg-state is partial. The notes say what is
missing: creating the action, bookmarks and other triggers, /Next
chains, JavaScript ocg.state, and the Layers panel keeping radio-button
groups itself.
* French: Set layer visibility
The French catalog is coverage-checked since #291.
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>
* M12: run XFA forms' JavaScript: calculations, validation, rows, visibility (#60)
Laid-out XFA forms had their fields but none of their behaviour: totals
didn't compute, "Add row" buttons did nothing, and subforms a check box
should reveal stayed hidden.
The js crate gains the XFA scripting object model as native boa objects
over a snapshot of the form tree: xfa.form navigation by name, SOM
resolution (absolute, relative with the containing-subform search,
descendants, indexes and wildcards), rawValue/presence/access, instance
managers (_name, addInstance, removeInstance, setInstances, count),
xfa.host (messageBox, resetData, print, setFocus, gotoURL), xfa.layout
page numbers, xfa.event, app, console and util, plus unqualified sibling
names as XFA resolves them. Scripts run with `this` bound to the node and
yield their completion value; everything they change or ask for comes
back as effects.
The xfa crate builds the live form tree (instances from the data, values,
presence and access with overrides) and the event table from the
template, keeps presence and access overrides on the AcroForm
(/PCXfaOverrides) so undo and reopening preserve them, adds and removes
row instances in the datasets packet through the existing merge
pipeline, and lays the form out again on demand.
The engine runs initialize and calculate scripts on open (an appended
revision, nothing dirty), exit, validate and calculate after a field
changes (a failing validate shows its message and keeps the value, as
Acrobat does), and click scripts for buttons through run_javascript, so
the app's buttons and the js_run tool work unchanged. Values a script
sets go to the fields and the data at once; rows and visibility changes
re-lay the form out. All of it is one undo step. JavaScript off turns it
off. FormCalc scripts are recognised and reported, not run.
Bounds: script length and nesting as before, loop and recursion limits,
at most 1000 instances added per run, 2000 scripts and 50 re-layouts per
event; a calculate script that adds rows, or a click script looping on
addInstance/setInstances, ends quickly with a bounded form (tested).
Checked on IRCC's IMM 5669: opens with its page-number scripts, the Print
button's xfa.host.print runs through js_run, fill and save keep the
original bytes.
* M12: Save and SaveAs named actions run the file commands (#60)
XFA forms' Save buttons are app.execMenuItem("SaveAs"), which the layout
turns into a SaveAs named action; the shell answered it with "the SaveAs
action isn't supported yet". Named Save and SaveAs now run file.save and
file.save_as, like Named Print opens the print dialog.
The buttons test covers Save against a file on disk (SaveAs opens the
native dialog, which a headless test must not).
* M12: bound XFA form scripts against hostile forms (#60)
Review fixes for the XFA scripting PR (#230):
- Effects: values, presence and access set again on the same object merge
(last wins, behind order-dependent effects); 10k effects, 100 message boxes
and 1000 console lines per script and per event, reported when hit. An
event's data writes are kept in memory and written as one rewrite of the
datasets packet; later writes in the same edit replace that stream in place.
- form_tree stops at 200k objects and says so; forms without scripts build no
live form and run nothing.
- Only click scripts may print, save, open links or move the focus; others are
noted in the console. Open-time messages and errors show right after open.
- Lower loop limits for initialize/calculate/validate, a time budget per event
after which remaining scripts are skipped and reported, and a per-script time
limit after which a runaway script is abandoned and the document's scripts
turned off.
- What open-time scripts change is noted in the XFA warnings.
- A document's Named /Save no longer writes the file on click (SaveAs opens
the Save As dialog, as a script's execMenuItem does).
- XFA click scripts are no longer written as /S /JavaScript actions: the
button carries /PCXfaClick and runs by SOM path. Private keys documented.
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>
* M12: add calibrated 2D measurement tools
* M12: harden measurement tools for landing (#208)
Bounded snap targets (endpoints only for accepted segments, page-wide cap),
lenient extraction (deep q nesting and undecodable streams are skipped and
reported), per-page snap cache, measure::list reports unsupported entries
instead of failing, closed polygons with a repeated vertex, printable unit
labels (m²), cached panel listing, WinAnsi captions, indirect /VP kept,
measure.export skipped in the command test like other pickers, missing
translations, honest parity (scale and distance partial) and ROADMAP.
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>
* M12: lay dynamic XFA forms out from their template (#60)
A dynamic XFA form is a PDF shell around an XML template: one placeholder
page ("requires Adobe Reader") and /NeedsRendering true. Every viewer
without an XFA engine shows the placeholder, and so did PrintCraft.
New crate printcraft-xfa (L3, already reserved in the layering table). It
reads the XDP packets, parses the template (XFA 3.3: subforms, areas,
fields, draws, exclusion groups, page sets, fonts, paragraphs, borders,
captions, rich text, inline JPEGs, occurrences, breaks, overflow leaders,
column widths), lays it out (positioned, tb, lr-tb, table/row; containers
without a width size to their content; flow across content areas and page
masters; header rows repeat after a break; hidden takes no space; page
number and count fields resolve) and writes real pages and AcroForm
widgets into the document: text, date (AFDate format and keystroke
actions from the picture clause), check boxes, radio groups, push buttons
with reset/print/save/URI actions. Standard-14 fonts stand in for Arial,
Courier New and friends; nothing is embedded.
The engine lays a dynamic form out when it opens it. The original bytes
stay: the layout is one appended revision, the widgets get appearances
from the forms crate, and the XFA packets remain so Adobe's viewers keep
rendering the form their way. A marker on the AcroForm (/PCXfaLayout)
stops a saved form from being laid out twice; each field keeps its SOM
path (/PCSom) for the data round trip to come. doc_info, the CLI's info
and the notice bar report the layout.
Checked on IRCC's IMM 5669 (Schedule A, Designer 6.2, 464 KB template,
AES-encrypted, usage rights): four pages and 308 fields in 27 ms, the
same page structure as the form, filled through form_fill, saved in
place with the original bytes intact and reopened with the values.
Not done, and said so in the parity notes: the datasets packet is neither
read nor written, so Adobe's viewers don't show values filled in here;
no FormCalc or XFA JavaScript (rows don't grow, nothing calculates);
choice lists are text fields; signature, image and barcode fields are
blank; metrics are approximate and fidelity is eyeballed, not measured.
Tests: crates/xfa (parsing, sizing, pagination with repeated headers,
PDF writing, hostile input), the engine (open, fill, incremental save,
reopen without a second layout), the automation tools (open, info,
render, fill, save, reopen) and the UI notice (kittest).
* M12: XFA forms read and write their datasets packet; static forms too (#60)
With the layout alone, a form filled in PrintCraft opened blank in Adobe
Reader, and one filled in Acrobat opened blank here: Adobe's viewers keep
the values in the XFA datasets packet, not in the AcroForm fields.
The xfa crate's new data module reads the datasets packet (normal binding:
a field's node is named after it under its named ancestor subforms,
repeated instances as repeated siblings) and writes it back from the
fields. Laying a form out now takes each field's value from its data node
(dates in ISO form shown in the field's pattern, check boxes and radio
groups by their on values) and gives a repeating subform or table row as
many instances as the data has, so rows another viewer added appear.
Every laid-out field carries its SOM path and its on/off items, so the
packet can be rebuilt from the AcroForm at any time.
The engine writes the datasets after every form edit (one revision with
the field change), and on open applies the datasets to the fields of a
static XFA form, or of a dynamic one laid out earlier, when another
viewer changed them since. The static-form notice now says the two are
kept in step instead of warning that Acrobat may disagree.
Checked on IRCC's IMM 5669: fill, save in place (original bytes intact),
and the file holds <IMM_5669><page1><familyName>SINGH</familyName>…, the
structure Acrobat writes for this form; reopening shows the values.
Not done: explicit bind refs, global binding and data descriptions are
not followed; no import or export of standalone XML or XDP data files.
* M12: XFA layout memoizes container sizes, bounding measurement work (#60)
A container without a width measured its content for its width and again for its
height at every level, so nested width-less subforms took 2^depth measurements, all
synchronously in Session::open. Container sizes are now cached per (node, width,
depth), the root and page-area items keep stable addresses instead of being cloned
per measurement, and a measurement budget turns anything left into TooLarge.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* M12: rustfmt the merged XFA notice (#60)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* M12: XFA datasets are merged into, not replaced; capped; UTF-16 kept; rewrites recorded (#60)
- write_datasets merged nothing: it replaced <xfa:data> with the AcroForm-bound values
alone, dropping unbound, namespaced and deep data. It now edits the existing packet
text in place: a bound node's text is replaced only when it differs, missing nodes are
added below the deepest existing one, and everything else (unbound data, other
namespaces, attributes, comments, layout) stays byte for byte. A packet of an XFA array
that relies on the envelope's prefixes is read inside a wrapper declaring them.
- What can't be written (a node holding structured content, too-deep paths or absurd
SOM indices, conflicting fields, an unreadable or non-UTF packet) comes back as
DatasetsWrite.warnings; the engine keeps them in Document.xfa_warnings and
info.warnings (surviving re-reads), and doc_info reports xfa_warnings.
- Building data counted same-name siblings for every one it added (quadratic in an
untrusted index) with no total cap. Children are now indexed by name, indices above
10,000 and paths deeper than 64 are refused, and one write creates at most 20,000 nodes.
- Packets are decoded exactly (UTF-8, UTF-16 LE/BE with or without BOM) and written back
in the encoding they came in; anything else is reported and left untouched instead of
being rewritten from a lossy UTF-8 reading.
- A static XFA form whose fields are rewritten from the datasets on open now says so in
info.warnings, naming the fields.
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>
The app, crates, binaries, bundle id, packaging, icons, screenshots and docs are now
PdfCraft / pdfcraft (repo storytold/pdfcraft). On first launch the desktop app moves the
PrintCraft settings and crash-recovery folders to the new name, and both apps read settings
saved under the old storage key, so upgrades keep recent files, preferences and unsaved work.
The signing test fixtures keep their PrintCraft subject names (they are binary).
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
`printcraft_engine::guard` wraps `catch_unwind` and returns an error message.
- `Session::apply`: edits run on a copy of the document, so a panic leaves it unchanged and is
reported as an error. A panic while refreshing rolls the edit back.
- `Session::open`, `save_bytes`, `save_full_bytes` and `export_data` report a panic as an
open, write or export error.
- `PrintCraftApp::execute`: a command that panics shows a notice, and the app and its documents
keep running.
- The desktop app installs a panic hook that logs every panic to stderr, with a backtrace when
`RUST_BACKTRACE` is set.
Autosave and crash recovery (`RecoveryStore`) were already in place for anything that escapes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
