Fix registered fonts for Java DOCX and PPTX conversion - #157
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📝 WalkthroughWalkthroughChangesThe Java renderer now uses registered fonts for DOCX and PPTX text rendering, with fallback behavior when no usable font is available. The API adds registry cleanup. Tests validate Unicode output and embedded fonts. Documentation and Maven references update to version 0.1.6. Registered font rendering
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The release adds registered-font rendering for DOCX and PPTX, but copied examples can leave fonts registered after a failed conversion, affecting later work in the same JVM. Some translated support tables also understate PPTX support. These are bounded documentation issues and do not block the implemented conversion behavior. Sequence Diagram(s)sequenceDiagram
participant OfficeConversion
participant SimplePdfTextRenderer
participant MiniPdf
participant PDFBox
OfficeConversion->>SimplePdfTextRenderer: renderPages(sourcePages, pageSize)
SimplePdfTextRenderer->>MiniPdf: read registered fonts
SimplePdfTextRenderer->>PDFBox: load supported font and render pages
PDFBox-->>SimplePdfTextRenderer: return PDF bytes
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 22 functions across 5 files. (11 skipped: 11 unsupported.)
✨ Finishing Touches📝 Generate docstrings
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🟡 Changes recommended
The registered-font rendering path needs safer PDPageContentStream lifecycle handling to ensure streams are always closed on exceptions, and the Java README font snippet currently lacks a required Path import.
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Pull request overview
This PR fixes Java DOCX/PPTX conversion so process-wide MiniPdf.registerFont(...) registrations are honored by the shared text renderer (using an embedded Type 0 font when it covers the document text), adds lifecycle management via MiniPdf.clearRegisteredFonts(), and bumps Java artifacts/docs to 0.1.6 with new Unicode regression tests.
Changes:
- Route DOCX/PPTX (and shared renderer paths) through a registered-font rendering path when a suitable font is available.
- Add
MiniPdf.clearRegisteredFonts()and ensure test isolation via@AfterEachcleanup. - Add Unicode + embedded-font regression tests and update Java/version documentation to
0.1.6.
File summaries
| File | Description |
|---|---|
| README.md | Bumps Maven version snippet to 0.1.6; documents Java font registration + clearing. |
| minipdf-java/README.md | Updates version/CLI examples to 0.1.6; adds font registration guidance. |
| minipdf-java/pom.xml | Bumps parent Maven version to 0.1.6. |
| minipdf-java/minipdf/pom.xml | Bumps module Maven version to 0.1.6. |
| minipdf-java/minipdf-cli/pom.xml | Bumps CLI module Maven version to 0.1.6. |
| minipdf-java/minipdf-cli/src/main/java/io/github/minisoftware/minipdf/cli/MiniPdfCommand.java | Updates CLI version string to 0.1.6. |
| minipdf-java/minipdf/src/main/java/io/github/minisoftware/minipdf/MiniPdf.java | Adds clearRegisteredFonts() API for process-wide font lifecycle management. |
| minipdf-java/minipdf/src/main/java/io/github/minisoftware/minipdf/internal/SimplePdfTextRenderer.java | Adds registered-font rendering path using PDFBox Type 0 embedding, with fallback to legacy renderer. |
| minipdf-java/minipdf/src/test/java/io/github/minisoftware/minipdf/FontRegistrationTest.java | Adds @AfterEach cleanup to prevent cross-test font registration leakage. |
| minipdf-java/minipdf/src/test/java/io/github/minisoftware/minipdf/BasicOfficeConversionTest.java | Adds DOCX/PPTX Unicode + embedded-font regression tests and shared helper utilities. |
| documents/README.zh-TW.md | Updates Java Maven version + font registration guidance (traditional Chinese). |
| documents/README.zh-CN.md | Updates Java Maven version + font registration guidance (simplified Chinese). |
| documents/README.ko.md | Updates Java Maven version + font registration guidance (Korean). |
| documents/README.ja.md | Updates Java Maven version + font registration guidance (Japanese). |
| documents/README.it.md | Updates Java Maven version + font registration guidance (Italian). |
| documents/README.fr.md | Updates Java Maven version + font registration guidance (French). |
Review details
- Files reviewed: 16/16 changed files
- Comments generated: 2
- Review effort level: Lite
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Actionable comments posted: 4
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Inline comments:
In `@documents/README.fr.md`:
- Around line 108-110: Align the Java capability tables with the PPTX
font-registration notes by adding PPTX to the Java input lists in
documents/README.fr.md lines 108-110, documents/README.it.md lines 108-110, and
documents/README.ja.md lines 108-109; do not remove PPTX from the notes.
In `@documents/README.ko.md`:
- Around line 108-109: Update the Java support row to include PPTX alongside
XLSX and DOCX in documents/README.ko.md lines 108-109, documents/README.zh-CN.md
lines 107-108, and documents/README.zh-TW.md lines 107-108, keeping the
translated tables consistent.
In `@minipdf-java/README.md`:
- Line 49: Wrap each Java conversion example’s font registration/conversion flow
in a finally block so MiniPdf.clearRegisteredFonts() always executes, including
when conversion fails: minipdf-java/README.md lines 49-49,
documents/README.ko.md lines 105-105, documents/README.zh-CN.md lines 104-104,
and documents/README.zh-TW.md lines 104-104.
In `@README.md`:
- Line 109: Make the Java examples exception-safe by wrapping font registration,
Files.readAllBytes, and MiniPdf.convertToPdf in try/finally blocks, with
MiniPdf.clearRegisteredFonts() in finally. Apply the same change in README.md
(line 109), minipdf-java/README.md, documents/README.fr.md (line 105),
documents/README.it.md (line 105), documents/README.ja.md (line 105), and the
remaining two translated README files under documents/.
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ℹ️ Review info
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Configuration used: defaults
Review profile: CHILL
Plan: Advanced
Run ID: 0e81b3d7-7608-4c27-bd2f-ad37a1fb4039
📒 Files selected for processing (16)
README.mddocuments/README.fr.mddocuments/README.it.mddocuments/README.ja.mddocuments/README.ko.mddocuments/README.zh-CN.mddocuments/README.zh-TW.mdminipdf-java/README.mdminipdf-java/minipdf-cli/pom.xmlminipdf-java/minipdf-cli/src/main/java/io/github/minisoftware/minipdf/cli/MiniPdfCommand.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/test/java/io/github/minisoftware/minipdf/BasicOfficeConversionTest.javaminipdf-java/minipdf/src/test/java/io/github/minisoftware/minipdf/FontRegistrationTest.javaminipdf-java/pom.xml
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Fix Java DOCX and PPTX conversion so
MiniPdf.registerFont(...)is honored by the shared text renderer instead of falling back to Windows-1252 Helvetica.Changes
MiniPdf.clearRegisteredFonts()for process-wide font lifecycle management0.1.6Validation
mvn -B -ntp clean verifyFixes #151
Summary by CodeRabbit
New Features
Documentation