Pure-MoonBit library for reading, building, and writing PPTX (OOXML) presentations with a type-safe builder API.

pptx

powerpoint

ooxml

office

presentation

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Author

moonbitlang

Version

0.1.1

License

Apache-2.0

Repository

github.com/moonbitlang/office.mbt

Last updated

yesterday

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#PPTX for MoonBit Office

moonbitlang/pptx reads, builds, and writes PowerPoint (.pptx) presentations. It is a module of the Office workspace, managed by the root moon.work and the repository's shared CI, tooling, and release workflow.

Derived from t-ujiie-g/moon-pptx. Thank you to t-ujiie-g and the original contributors for the architecture, implementation, documentation, and extensive tests. See UPSTREAM.md for the pinned revision and attribution; the Apache-2.0 LICENSE is retained. The MoonBit team maintains the official module's API and releases. Contributions from the original author are welcome, and the original project can continue independently.

#Packages

Package	Responsibility
presentation	Presentation model, building, editing, loading, and saving
slide, slide_master, theme	Slides, layouts, masters, and themes
chart, chart_ex, smartart	Charts and diagrams
notes, comments	Speaker notes and comments
oxml, units	OOXML models and typed units
demos	Shared sample-deck builders with public-API tests
cmd/demos, cmd/bench	Demo generation and benchmark executables
integration	Cross-package tests, embedded fixtures, and benchmarks
sdk_validity	Native tests against the shared OpenXML SDK validator

Shared XML and ZIP support comes from the separate moonbitlang/ooxml module through moonbitlang/ooxml/xml and moonbitlang/ooxml/opc.

PPTX source packages live directly under this module, matching the other Office modules. Examples and benchmarks are packages of moonbitlang/pptx, not separate modules or workspaces. Import paths such as moonbitlang/pptx/presentation are unchanged by the directory organization.

#API boundaries

Parser and writer state, package storage and indexes, presentation caches, and staged construction handles have private fields. Construct and edit them through their methods. OOXML value models retain the fields needed to inspect, construct, and preserve document content, including unknown XML extensions.

Use Presentation::opc_package() for low-level edits that the typed APIs do not cover. Package::parts(), Part::bytes(), ContentTypes::defaults() and overrides(), and Relationships::items() return independent buffers or arrays. Editing these snapshots does not edit the document: replace a part with Package::replace_part, or build and install an updated catalog. Part::new also copies its input buffer. Slide-order caches refresh when the presentation or relationship part is replaced.

#Develop

Run all commands from the repository root:

moon check --deny-warn
moon test --target native
moon info
moon fmt

For focused work, select the relevant package:

moon test --deny-warn --target native pptx/presentation pptx/demos pptx/integration
moon run --target native pptx/cmd/bench -- 10
bash scripts/generate_pptx_demos.sh
bash scripts/validate_pptx.sh demos_out_pptx/sample.pptx
python3 scripts/embed_pptx_corpus.py
moon fmt pptx/integration

See the cookbook, demo guide, validation guide, and benchmark guide. The shared validator needs .NET 8; the wrapper uses Office's existing .NET setup and build cache.

Publishing follows the common release process. The local module version is not evidence of a registry release. The unified office CLI integrates PPTX identification, outline, slide/notes text extraction, and fresh one-slide creation through office-lib/pptx. See Office PPTX integration for scope and limitations. The library and dedicated development commands expose additional functionality.

#Limits

Unknown XML element preservation is supported, but arbitrary PPTX input is not guaranteed to round-trip without loss. Attribute/namespace preservation, ZIP resource limits, and PowerPoint display/edit compatibility remain tracked in #549. SDK schema validation and parsed-model equality do not establish visual fidelity.

#Shared OPC and XML

Import moonbitlang/ooxml/opc and moonbitlang/ooxml/xml for the shared low-level types previously owned by PPTX. See the shared module for implementation boundaries. Presentation::save() now raises PptxError when ZIP writing fails.

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