NSDocument file type

kevgski

This is more of a cocoa question… I've been loading documents from a file like this:

let docError = MOPointer.alloc().init()
var newDocument = MSDocument.alloc().init();
newDocument.readFromURL_ofType_error(url,"com.bohemiancoding.sketch.drawing", docError);
console.log(sketch.fromNative(newDocument))

But I'm not sure where the type string "com.bohemiancoding.sketch.drawing" comes from? Is there a way to see where this comes from on MSDocument or MSDocumentController? Is it related to this document: https://developer.apple.com/library/archive/documentation/FileManagement/Conceptual/understanding_utis/understand_utis_declare/understand_utis_declare.html#//apple_ref/doc/uid/TP40001319-CH204-SW1 (declaring new uniform type identifiers)?

kevgski

I guess I can kinda answer my question. Looks like its an identifier from the bundle's info.plist file.

...
<string>Sketch</string>
	<key>CFBundleDocumentTypes</key>
	<array>
		<dict>
			<key>CFBundleTypeIconFile</key>
			<string>doc.icns</string>
			<key>CFBundleTypeName</key>
			<string>com.bohemiancoding.sketch.drawing</string>
			<key>CFBundleTypeRole</key>
			<string>Viewer</string>
			<key>LSHandlerRank</key>
			<string>Owner</string>
			<key>LSItemContentTypes</key>
			<array>
				<string>com.bohemiancoding.sketch.drawing</string>
			</array>
			<key>LSTypeIsPackage</key>
			<true/>
			<key>NSDocumentClass</key>
			<string>MSDocument</string>
		</dict>
		<dict>
			<key>CFBundleTypeIconFile</key>
			<string>doc.icns</string>
			<key>CFBundleTypeName</key>
			...

Some other types are

com.bohemiancoding.sketch.drawing.single
com.bohemiancoding.sketch.plugin
com.adobe.pdf
public.webp
com.adobe.encapsulated-postscript
public.image
com.bohemiancoding.sketch.plugin.bundle
com.bohemiancoding.sketch.clouddrawing.single