Single file type for multiple content types?
Is there any way to register a single file type with IDEA that corresponds to multiple file types? I'm creating a plugin for a system that has a class of files with a single extension where each file has a companion XML file that contains the main file's content type. It'd be great if I could register a single file type for the extension that, on a per-file basis, returns the appropriate response for FileType.getIcon(), FileType.isBinary(), FileType.isReadOnly(), etc., as well as the language of the file if the content type can be resolved to a different locally-registered file type, e.g., Javascript, HTML, PNG, etc. Unfortunately right now I'm not really seeing any good way to do that, though. Thoughts?
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You can use the FileTypeDetector extension point to dynamically determine the content type of a file.
Thanks! That definitely looks promising. I'm trying to implement this now but my implementation is never getting invoked. Debugging a bit I see that in FileTypeManagerImpl.getOrDetectFromContent(), these files are being auto-detected as text or binary before it would consult my implementation. Is there something I need to do to force it to skip auto-detection on these files and invoke my detector?
Try to invalidate caches? I think the detected file type is persisted and not updated when a new detector is registered.
That seems to have done it! One more question along these lines...is there any common facility in IDEA to resolve a MIME type/content type to a file type (or even a file extension)?
Thanks again!!!
UPDATE: I do see HtmlUtil.CONTENT_TYPES which uses MimeTypeDictionary, but that's just a list of MIME/content types, not a map from them to standard extensions. I saw a few third-party libs that can do this, but before I pull one into my project, I wanted to see if this IDEA had this out-of-the-box.
UPDATE 2: I went ahead and used Apache Tika 1.8 (just the core jar) for this purpose and it's working wonderfully. Obviously if IDEA has such a provision internally, that would be even better, but at this point I think I'm good to go!