View provider for newly generated file Follow

Created December 28, 2017 16:45

My plugin generates a PsiFile using PsiFileFactory#createFileFromText and I want to use FileViewProvider immediately after. How do I make it generate a psi tree/virtual file? I tried adding the file to some PsiDirectory (temporarily) and then using VirtualFileManager#refreshAndFindFileByUrl, but the file still doesn't seem to have a view provider.

Also, is there a way to get rid of whitespace left by programmatically removing xml tags/attributes via psi?

3 comments

Eric Bishton

Created December 28, 2017 19:18

A PsiFile _is_ a PsiElement. It's children are the PSI tree that you want to traverse.

If you need a FileViewProvider: `psiFile.getFileViewProvider();`

Look at PsiElement.delete() to remove elements you don't want.

Zjin256

Created December 29, 2017 14:52

No...PsiFile.getFileViewProvider doesn't work if I do it on the newly made file.

I'm deleting the xml attributes and tags just fine but they leave whitespace where they used to be.

Eric Bishton

Created December 29, 2017 18:23

You can create a FileViewProvider the hard way:

new SingleRootFileViewProvider(PsiManager.getInstance(project), 
                                     psiFile.getVirtualFile(),
                                     isPhysical) {
  @Override
  public boolean supportsIncrementalReparse(@NotNull Language rootLanguage) {
    return false;
  }
}

Whitespace is another PSI element just like the XML you are manipulating. Use PsiElement.getPreviousSibling() and getNextSibling() to determine whether there are extra white spaces that you want to remove.

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