Add shared multi-language visual benchmarks - #127
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Included review availability: Your plan provides up to 2 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe change adds PPTX conversion to Java, XLSX and PPTX conversion to Python, related tests and documentation, and shared PowerShell tooling for cross-language Office visual benchmarks. ChangesJava Office conversion
Python Office conversion
Cross-language visual benchmarking
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to The new Office conversion and benchmark support can generate PDFs with missing, reordered, or clipped spreadsheet and presentation content for valid inputs, and the Python benchmark command can run against an unintended interpreter. These issues should be addressed before merge. Sequence Diagram(s)sequenceDiagram
participant JavaAPI
participant PptxConverter
participant SimplePdfTextRenderer
JavaAPI->>PptxConverter: convert PPTX bytes
PptxConverter->>SimplePdfTextRenderer: render slide pages
SimplePdfTextRenderer-->>JavaAPI: PDF bytes
sequenceDiagram
participant PythonAPI
participant convert_xlsx
participant convert_pptx
PythonAPI->>convert_xlsx: dispatch XLSX input
PythonAPI->>convert_pptx: dispatch PPTX input
convert_xlsx-->>PythonAPI: PDF bytes
convert_pptx-->>PythonAPI: PDF bytes
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 1.82% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 55 functions across 15 files. (4 skipped: 4 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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🟡 Changes recommended
There are a few correctness/robustness issues in newly added code paths (notably ZIP entry normalization in Python package reads, deterministic XML reader closure in Java PPTX parsing, and collision risk in benchmark case IDs) that should be addressed before approval.
Once you've addressed the issues Copilot identified, you can request another Copilot review.
Pull request overview
This PR introduces a shared, Git-tracked Office fixture corpus to run consistent cross-language visual benchmarks across implementations, while adding baseline format coverage so each language can participate in XLSX/DOCX/PPTX comparisons and share LibreOffice reference PDFs keyed by content-derived case IDs.
Changes:
- Add a shared cross-language Office corpus manifest and document the shared benchmark workflow.
- Add a unified PowerShell entry point to run per-language (and all-language) visual benchmarks with isolated artifacts and shared LibreOffice references.
- Extend the Python implementation to support XLSX and PPTX conversion, and extend the Java implementation with baseline PPTX conversion plus updated CLI/docs/tests.
File summaries
| File | Description |
|---|---|
| tests/MiniPdf.Benchmark/shared-office-corpus.json | Declares shared, Git-tracked fixture roots/patterns for cross-language benchmarks. |
| tests/MiniPdf.Benchmark/README.md | Documents the shared corpus and per-language/all-language benchmark commands. |
| tests/MiniPdf.Benchmark/compare_pdfs.py | Propagates source_sha256 into comparison outputs for traceability. |
| scripts/Run-Rust-VisualBenchmark.ps1 | Adds Rust wrapper for the shared visual benchmark runner. |
| scripts/Run-Python-VisualBenchmark.ps1 | Adds Python wrapper for the shared visual benchmark runner. |
| scripts/Run-Node-VisualBenchmark.ps1 | Adds Node wrapper for the shared visual benchmark runner. |
| scripts/Run-Java-VisualBenchmark.ps1 | Adds Java wrapper for the shared visual benchmark runner. |
| scripts/Run-Go-VisualBenchmark.ps1 | Adds Go wrapper for the shared visual benchmark runner. |
| scripts/Run-DotNet-VisualBenchmark.ps1 | Adds .NET wrapper for the shared visual benchmark runner. |
| scripts/Run-All-Language-VisualBenchmarks.ps1 | Adds a driver to run all language benchmarks against the same selected cases. |
| scripts/Invoke-LanguageVisualBenchmark.ps1 | Implements the shared-corpus benchmark orchestration (selection, build, convert, reference, compare, reports). |
| minipdf-python/tests/test_api.py | Adds Python API tests covering XLSX and PPTX conversion paths. |
| minipdf-python/tests/helpers.py | Adds minimal XLSX/PPTX in-memory fixtures used by tests. |
| minipdf-python/src/minipdf/xlsx.py | Introduces baseline XLSX-to-PDF conversion (cell value extraction to text). |
| minipdf-python/src/minipdf/pptx.py | Introduces baseline PPTX-to-PDF conversion (slide text extraction + slide sizing). |
| minipdf-python/src/minipdf/office.py | Exposes ZIP entry names for converters to enumerate package contents. |
| minipdf-python/src/minipdf/api.py | Enables XLSX and PPTX conversion via the public Python API. |
| minipdf-python/README.md | Updates Python documentation to reflect XLSX/PPTX support and CLI examples. |
| minipdf-java/README.md | Adds Java README describing library/CLI usage and current conversion scope. |
| minipdf-java/pom.xml | Bumps Java parent version to 0.1.1-SNAPSHOT. |
| minipdf-java/minipdf/src/test/java/io/github/minisoftware/minipdf/OfficeFormatDetectionTest.java | Updates expectations now that PPTX is supported and missing slides are invalid input. |
| minipdf-java/minipdf/src/test/java/io/github/minisoftware/minipdf/ClassicFixtureSmokeTest.java | Adds a PPTX fixture smoke test for Java. |
| minipdf-java/minipdf/src/test/java/io/github/minisoftware/minipdf/BasicOfficeConversionTest.java | Adds Java PPTX conversion tests and additional path/IO behavior coverage. |
| minipdf-java/minipdf/src/main/java/io/github/minisoftware/minipdf/MiniPdf.java | Routes PPTX conversions to the new PPTX converter. |
| minipdf-java/minipdf/src/main/java/io/github/minisoftware/minipdf/internal/SimplePdfTextRenderer.java | Adds page-aware rendering to support “one PDF page per slide” for PPTX. |
| minipdf-java/minipdf/src/main/java/io/github/minisoftware/minipdf/internal/pptx/PptxConverter.java | Adds baseline PPTX parsing/text extraction and slide dimension handling. |
| minipdf-java/minipdf/pom.xml | Bumps Java library module to 0.1.1-SNAPSHOT. |
| minipdf-java/minipdf-cli/src/test/java/io/github/minisoftware/minipdf/cli/MiniPdfCommandTest.java | Adds a Java CLI PPTX conversion test. |
| minipdf-java/minipdf-cli/src/main/java/io/github/minisoftware/minipdf/cli/MiniPdfCommand.java | Extends CLI to accept PPTX and updates version/description strings. |
| minipdf-java/minipdf-cli/pom.xml | Bumps Java CLI module to 0.1.1-SNAPSHOT. |
Review details
Suppressed comments (1)
minipdf-java/minipdf/src/main/java/io/github/minisoftware/minipdf/internal/pptx/PptxConverter.java:75
readSlidecloses theXMLStreamReaderonly on the happy path. If a parsing exception happens mid-loop, the reader is not closed. Switching to try-with-resources keeps resource handling deterministic and avoids potential leaks.
try {
XMLStreamReader reader = SecureXml.reader(xml);
while (reader.hasNext()) {
int event = reader.next();
if (event == XMLStreamConstants.START_ELEMENT && reader.getLocalName().equals("p")) {
- Files reviewed: 30/30 changed files
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Inline comments:
In
`@minipdf-java/minipdf/src/main/java/io/github/minisoftware/minipdf/internal/pptx/PptxConverter.java`:
- Around line 32-35: Update PptxConverter’s slide discovery to use the
presentation’s p:sldIdLst order, resolving each relationship ID through
ppt/_rels/presentation.xml.rels to its slide-part target; do not derive
membership or ordering from slide filenames. Exclude unreferenced slide parts
and preserve the resolved presentation order, adding coverage for reordered
relationships and an orphan slide part.
In `@minipdf-python/src/minipdf/pptx.py`:
- Around line 81-82: Update the paragraph placement logic around cursor_y and
page.add_text so non-empty paragraphs that would reach or exceed the slide’s
lower boundary are wrapped or moved to a valid page position before being
written. Preserve the existing spacing and rendering behavior for paragraphs
that fit, and ensure no text is passed to PdfPage.add_text with a negative
vertical coordinate.
- Around line 61-64: Update convert_pptx to derive slide order from
presentation.xml’s p:sldIdLst and resolve each relationship through
presentation.xml.rels, rather than sorting package.names with _natural_key.
Include only referenced slide relationships in declared order and resolve custom
relationship targets correctly.
In `@minipdf-python/src/minipdf/xlsx.py`:
- Around line 60-86: Format the new XLSX and PPTX converters with Ruff so they
satisfy the repository’s formatting check; apply the formatter to the
minipdf-python package, including the code around the XLSX conversion flow.
- Line 35: Update convert_xlsx to parse xl/workbook.xml and
xl/_rels/workbook.xml.rels, resolve worksheet and shared-string targets from
their relationship IDs, and process sheets in the workbook’s declared sheet
order instead of filtering and sorting package filenames. Use the resolved
shared-strings part when available so shared-string indices remain correct.
In `@scripts/Invoke-LanguageVisualBenchmark.ps1`:
- Around line 241-243: Update the $Tools.python selection to use the
platform-appropriate virtual-environment interpreter path: retain
.venv/Scripts/python.exe on Windows and check .venv/bin/python on POSIX systems
before falling back to Find-Command "python".
After applying the fix, consider running `coderabbit review --agent` for local
review. Visit https://docs.coderabbit.ai/cli.
🪄 Autofix
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
ℹ️ Review info
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Review profile: CHILL
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Run ID: 72afc985-d853-405d-bf6f-c08bed9c0eff
📒 Files selected for processing (30)
minipdf-java/README.mdminipdf-java/minipdf-cli/pom.xmlminipdf-java/minipdf-cli/src/main/java/io/github/minisoftware/minipdf/cli/MiniPdfCommand.javaminipdf-java/minipdf-cli/src/test/java/io/github/minisoftware/minipdf/cli/MiniPdfCommandTest.javaminipdf-java/minipdf/pom.xmlminipdf-java/minipdf/src/main/java/io/github/minisoftware/minipdf/MiniPdf.javaminipdf-java/minipdf/src/main/java/io/github/minisoftware/minipdf/internal/SimplePdfTextRenderer.javaminipdf-java/minipdf/src/main/java/io/github/minisoftware/minipdf/internal/pptx/PptxConverter.javaminipdf-java/minipdf/src/test/java/io/github/minisoftware/minipdf/BasicOfficeConversionTest.javaminipdf-java/minipdf/src/test/java/io/github/minisoftware/minipdf/ClassicFixtureSmokeTest.javaminipdf-java/minipdf/src/test/java/io/github/minisoftware/minipdf/OfficeFormatDetectionTest.javaminipdf-java/pom.xmlminipdf-python/README.mdminipdf-python/src/minipdf/api.pyminipdf-python/src/minipdf/office.pyminipdf-python/src/minipdf/pptx.pyminipdf-python/src/minipdf/xlsx.pyminipdf-python/tests/helpers.pyminipdf-python/tests/test_api.pyscripts/Invoke-LanguageVisualBenchmark.ps1scripts/Run-All-Language-VisualBenchmarks.ps1scripts/Run-DotNet-VisualBenchmark.ps1scripts/Run-Go-VisualBenchmark.ps1scripts/Run-Java-VisualBenchmark.ps1scripts/Run-Node-VisualBenchmark.ps1scripts/Run-Python-VisualBenchmark.ps1scripts/Run-Rust-VisualBenchmark.ps1tests/MiniPdf.Benchmark/README.mdtests/MiniPdf.Benchmark/compare_pdfs.pytests/MiniPdf.Benchmark/shared-office-corpus.json
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Summary
Validation
git diff --checkpassedNotes
The focused smoke matrix uses one tracked fixture per format. The default runner uses the full tracked corpus when
-MaxCasesPerFormatis omitted.Summary by CodeRabbit
New Features
Documentation
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