[narain1]

Problem

A paragraph with a line break (Shift+Enter) has its characters scrambled in the PDF text layer. Text after a break is read from one position too early, so search and copy give wrong text. In a table cell I saw BETA come out as ETAG.

Cause

text_layer and master_text_pieces in crates/pdf/src/lib.rs build each paragraph's string with p.runs.iter().map(|r| r.text.as_str()).collect::<String>(), then cut the laid-out run's character range out of it. A RunKind::Break run has empty text but occupies one character in the layout, because Run::content() returns "\u{b}" for it. The string is one character short per break, so every later range is shifted.

Fix

Build the string with Paragraph::text(), which is a sum of Run::content() and so counts a break as one character like the layout does. This covers both sites: the slide text layer, and the notes and handout master text.

Tests

crates/pdf/src/tests_line_breaks.rs adds two regression tests:

• line_breaks_preserve_actual_pdf_text_and_native_character_ranges exports a slide for several paragraphs with breaks (leading, consecutive, trailing, and accented or Greek text with combining marks). It checks that the layout's character ranges index the paragraph text and that the extracted PDF text equals the source with the breaks removed.
• line_breaks_preserve_master_pieces_and_notes_handout_pdf_text checks master_text_pieces and the exported text on notes and handout pages, where the master header text has breaks.

Both fail on main and pass with this change. cargo fmt --check is clean and the 17 tests in deckcraft-pdf pass.

Overlap with open PRs

#1192 and #1197 rewrite the same two lines for a different bug (slide-number fields, #1153): #1192 switches them to r.content() and #1197 to a precomputed shown string. Either also fixes this line-break bug, and I checked that applying only #1192's two content() hunks makes these tests pass. Neither adds a test for breaks.

I opened this so the regression tests land. If #1192 or #1197 merges first, I'll rebase this down to just the tests, or close it if you'd rather add them to that PR. Happy to go either way.

Summary by CodeRabbit

• Bug Fixes
  • Fixed PDF text export for paragraphs containing Shift+Enter line breaks. Characters after a line break now remain aligned with their source text.
  • Improved extracted text consistency in Notes and Handouts exports: line breaks are omitted, while slide and header text appears once per exported page. The source presentation remains unchanged during export.

[coderabbitai]

Walkthrough

This change adds PDF regression tests for line breaks in text layers and master headers. The tests check extracted text, character ranges, source presentation immutability, and Notes and Handouts output. The roadmap records the line-break character-count behavior.

Changes: PDF line-break regression coverage

Layer / File(s)	Summary
Line-break regression tests and roadmap entry crates/pdf/src/lib.rs, crates/pdf/src/tests_line_breaks.rs, ROADMAP.md	The new tests check line breaks, character ranges, extracted PDF text, and source presentation immutability. Notes and Handouts tests check slide and master header text. The roadmap records the line-break character-count behavior.

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Low

Suggested reviewers: dylanmtaylor, echelon, nikitkara

Merge Risk: Minimal · up to 86f74

This change adds tests for line-break handling in PDF text export and a roadmap note. It does not alter runtime behavior in the supplied diff, and no merge-blocking risk was found.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentat…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: preserving paragraph line breaks in the PDF text layer.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 4 functions across 2 files. (1 skipped: 1 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

Finishing Touches

Generate unit tests (beta)

• Create a new PR

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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[Harrison-Booth]

Keeping line breaks aligned in PDF text improves search and copy results for exported presentations. I checked this change against #1470: the vector PDF work is separate from this text-layer line-break fix. If you would rather not, I can open a PR that credits you, keeps your commits and shows a git range-diff against this one, so you'll still get credit and have visible work.

[FredApps]

ReviewerA — source-read COMMENT (not an approval)

I read the head of the diff: PDF export keeps line breaks in the text layer's paragraph text. The two places that joined a paragraph's runs (runs.iter().map(|r| r.text).collect::<String>()) now call p.text(), so a line break inside a paragraph (Shift+Enter) counts as one character in the hidden text layer and offsets stay aligned with the drawn glyphs; the ROADMAP records it and a test module tests_line_breaks is added. A text layer whose offsets drift from the drawn text breaks search and selection in the PDF, so using the model's own text accessor is the correct fix. p.text() must give a newline or a vertical tab as the character the exporter expects, and that choice should be stated in the test. I have not run it, and no exact-head CI result exists for this head. Nothing was run.

I ran nothing and have no exact-head CI result for this PR, so this is not an approval. Where a diff was long I read its code hunks rather than every generated or documentation line.

Status: waiting_author.

[narain1]

Thanks for the careful review. I tested exact PR head 83cc4c52f6aeeb83b4db38a072249b2f457a5203 on Linux with Rust 1.95 using cargo test --locked -p deckcraft-pdf tests_line_breaks -- --nocapture: 2 passed, 0 failed. The build warned that the optional craft-fonts directory was absent; the fixture resolved Ubuntu and, for one Unicode case, DejaVu Sans.

The model character is U+000B VERTICAL TAB, not LF: the regression fixtures use \u{b}, and the passing test asserts that paragraph.text() equals the original fixture. Each break occupies one Rust char in the logical text used for run.chars slicing; the old concatenation of stored run text omitted that position and shifted subsequent glyph-to-text mappings.

One important distinction: the test decodes the PDF text-showing operations and expects the visible characters with U+000B removed. It verifies character alignment and content after breaks, including master/notes/handout paths; it does not assert that a newline or vertical tab is emitted into the PDF text stream or that every PDF reader reconstructs a line separator. This is a focused local test, not an exact-head CI result or a full suite run.

[aiongg]

AI-generated review (Opus). Not a maintainer decision.

No blocking problems found.

Both PDF text-layer sites now build the paragraph string with Paragraph::text(), so a line break counts as one character, as it does in the layout, and later character ranges no longer shift.

• crates/pdf/src/lib.rs:310 and crates/pdf/src/lib.rs:515: Paragraph::text() joins Run::content(), which gives \u{b} for a break (crates/model/src/text.rs:483). That is the same character the layout puts in its logical text (crates/text/src/lib.rs:734), so run.chars indexes the right string.
• These are the only two places that cut a paragraph string by run.chars, so the change covers both the slide text layer and the notes/handout master text.
• Field runs still use their stored text here, while the layout uses the evaluated value (crates/text/src/lib.rs:735). That is a separate issue (slide-number fields) and not part of this change.

Claims checked:

• verified: A break run has empty text but takes one character in the layout, so the old run.text concatenation was one character short per break and shifted later ranges (crates/model/src/text.rs:483 content() gives \u{b} for Break; crates/text/src/lib.rs:734 the layout adds \u{b} for each Break when it build…
• verified: Using Paragraph::text() fixes both sites: the slide text layer and the notes/handout master text (crates/pdf/src/lib.rs:310 (master_text_pieces) and crates/pdf/src/lib.rs:515 (text_layer) now call p.text(), which is runs.map(Run::content) at crates/model/src/text.rs:532-533; no other code slices by…
• unverified: The two new regression tests fail on main and pass with the change (crates/pdf/src/tests_line_breaks.rs:104 and :131 define the tests; main still has the old concatenation at crates/pdf/src/lib.rs:310; the tests were not run here)

Recommendation: merge, after a maintainer's decision.

Reviewed at 83cc4c5.

[aiongg]

Automated message. Not a maintainer decision.

This branch conflicts with main. Could you merge or rebase main into it? The conflict needs a person to resolve.

[narain1]

Merged current main into the branch in 86f7482 and resolved the conflicts. Main already contains the equivalent production fix from #1192, so this PR retains the line-break regression coverage. The Unicode fixture now accepts the canonically equivalent composed or decomposed accented character emitted by shaping.

Validation on Rust 1.95: cargo fmt --all -- --check passed and cargo test --locked -p deckcraft-pdf passed (22 tests). The optional craft-fonts directory was absent. cargo xtask ci passed formatting and the PDF dependency check, but stopped at workspace Clippy: ALSA development files were unavailable, and Clippy reported unrelated warnings in crates/anim and crates/pptx. Remaining CI stages did not run locally.

GitHub reports the branch mergeable. Ready for review; please rely on the new CI run for the full checks.

[coderabbitai]

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Failed pre-merge checks:
- Docstring Coverage:
Write docstrings for the functions missing them to satisfy the coverage
threshold.

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Review info

Run configuration

• Source mode: Auto
• Repository: storytold/deckcraft
• Branch: main
• File: .coderabbit.yaml
• Commit: 5484675
• Layers: Repository YAML
• Review profile: CHILL
• Plan: Advanced
• Run ID: 7f1538a4-a481-4eae-85f7-040a069f6355

Commits

Reviewing files that changed from the base of the PR and between 83cc4c5 and 86f7482.

Files selected for processing: 3

• ROADMAP.md
• crates/pdf/src/lib.rs
• crates/pdf/src/tests_line_breaks.rs

Files skipped from review as they are similar to previous changes: 1

• ROADMAP.md

Included review availability: This review used your included allowance. Your plan provides up to 8 included reviews per hour; 7 remain after this review.

[autocraft-bot]

AI-generated review. Not a maintainer decision.

Changes needed:

Reviewed at 86f7482.

Recommendation: update the pull request; it will be reviewed again.