Completion does not work for custom language

Answered

Completion 

extend(CompletionType.BASIC, PlatformPatterns.psiElement(MyTypes.ID), new CompletionProvider<CompletionParameters>() {
    @Override
    protected void addCompletions(@NotNull CompletionParameters parameters, @NotNull ProcessingContext context, @NotNull CompletionResultSet result) {
        PsiElement element = parameters.getPosition();
        PsiElement parent = element.getParent();
        PsiElement prevSibling = element.getPrevSibling();
        PsiElement nextSibling = element.getNextSibling();

        LOG.warn("---------------ID------------------");
        LOG.warn("position=" + element);
        LOG.warn("original position=" +  parameters.getOriginalPosition());
        LOG.warn("parent=" + parent);
        if (prevSibling != null) {
            LOG.warn("prevSibling=" + prevSibling);
        }
        if (nextSibling != null) {
            LOG.warn("nextSibling=" + nextSibling);
        }
    }
});

does not work for a tag like [[~10]] 

But for some reason it works for him

 

extend(CompletionType.BASIC, PlatformPatterns.psiElement(MyTypes.IDENTIFIER), new CompletionProvider<CompletionParameters>() {
    @Override
    protected void addCompletions(@NotNull CompletionParameters parameters, @NotNull ProcessingContext context, @NotNull CompletionResultSet result) {
        PsiElement element = parameters.getPosition();
        PsiElement parent = element.getParent();
        PsiElement prevSibling = element.getPrevSibling();
        PsiElement nextSibling = element.getNextSibling();

        LOG.warn("---------------IDENTIFIER------------------");
        LOG.warn("position=" + element);
        LOG.warn("original position=" +  parameters.getOriginalPosition());
        LOG.warn("parent=" + parent);
        if (prevSibling != null) {
            LOG.warn("prevSibling=" + prevSibling);
        }
        if (nextSibling != null) {
            LOG.warn("nextSibling=" + nextSibling);
        }
    }
});

 

which for a tag like [[+pls]]  

In parameters.getPosition() always PsiElement(MyTokenType.IDENTIFIER)

Lexer.flex

Parser.bnf

 

0
3 comments

Hi,

I'm sorry, but I don't understand what the issue is. What are expected/actual behaviors? Please try to explain it again.

0

I want my code to be executed when the cursor is inside a tag [[~10]] near a number and Ctrl + Space is pressed. 

But this doesn't happen with

extend(CompletionType.BASIC, PlatformPatterns.psiElement(MyTypes.ID), new CompletionProvider<CompletionParameters>() {
    @Override
    protected void addCompletions(@NotNull CompletionParameters parameters, @NotNull ProcessingContext context, @NotNull CompletionResultSet result) {
       // My code
    }
});

 

 

 

0

Before invoking completion, two important steps are done:

  1. Original file/PSI is copied.
  2. In the copy of the file/PSI, dummy identifier (see CompletionInitializationContext.DUMMY_IDENTIFIER) is inserted at the caret position, so that there is always a token present, that in most cases makes the PSI tree valid.

As far as I understand, in your case, the dummy identifier with characters is inserted, but you need a number. You can change the dummy identifier in your contributor to numbers by overriding com.intellij.codeInsight.completion.CompletionContributor.beforeCompletion() and using com.intellij.codeInsight.completion.CompletionInitializationContext.setDummyIdentifier().

1

Please sign in to leave a comment.