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File Associations

Goal

Register MarkdownViewer as able to open:

Markdown (.md, .markdown, .mdown)
Rich Text (.rtf)
Word OpenXML (.docx)
OpenDocument Text (.odt)

Current Status

GNUstep on Linux (GNOME)

Implemented:

Desktop entry MIME registration includes markdown + importable formats in Resources/MarkdownViewer.desktop.in.
Installer refreshes desktop MIME cache in scripts/install-desktop.sh.
Runtime file-open path auto-routes importable formats through converter in ObjcMarkdownViewer/OMDAppDelegate.m.

GNUstep App Bundle Metadata

Implemented:

ObjcMarkdownViewer/MarkdownViewerInfo.plist now declares:
- NSMIMETypes for GNUstep metadata consumers.
- CFBundleDocumentTypes for future macOS-compatible bundle metadata.

macOS (future target)

Prepared:

CFBundleDocumentTypes entries are already present in ObjcMarkdownViewer/MarkdownViewerInfo.plist.

Remaining when macOS build target is added:

Verify LaunchServices registration during install.
Validate Finder "Open With" behavior for all supported types.

Windows/GNUstep (future target)

Remaining:

Add installer-time registry registration for extensions and MIME types.
Register a ProgID mapping to MarkdownViewer.exe "%1".
Validate shell double-click behavior and "Open with" entries.

Notes

File association should cover formats the app can open directly or import via converter.
docx/odt/rtf opening depends on pandoc availability in runtime environment.