Theia: [editor] annoying auto-suggestion when writing comments

[vince-fugnitto]

Description

There is an annoying auto-suggestion feature when writing comments.
I do not expect suggestions when writing comments as it is intrusive to the experience.


In comparison, here's vscode:


[sauny]

Have been looking into this and from what I can see the problem is within packages/monaco/src/browser/monaco-snippet-suggest-provider.ts. I can intercept when the snippets are provided but I am having difficulty working out if it is within a comment block. The only feasible way I can see to do this is to the class name of the div what is being written... any other ideas?

[vince-fugnitto]

@sauny I took a look at the hint you provided and saw that provideCompletionItems is the one that provides the snippets from the bug.

https://github.com/theia-ide/theia/blob/c8dc1398fe1c9427f2d28b3c16049eeab8f6cb80/packages/monaco/src/browser/monaco-snippet-suggest-provider.ts#L30

For test purposes updating the code to return [] fixed the bug. I'm not entirely sure what the method is used for, since without it I am still getting proper snippets.

[vince-fugnitto]

@sauny I wonder if we can detect when we have a comment and not provide the snippet help.

[sauny]

@vince-fugnitto I thought that, the comments get registered in the grammar-contribution files but I see nowhere where they get used. If I can work out where theia decides to set the CSS for comments, I should be able to set something to say it is in comment mode... but I can't find a way to do it....

[vince-fugnitto]

@vince-fugnitto I thought that, the comments get registered in the grammar-contribution files but I see nowhere where they get used. If I can work out where theia decides to set the CSS for comments, I should be able to set something to say it is in comment mode... but I can't find a way to do it....

I don't quite understand what you mean about the CSS suggestion.

[sauny]

I meant the Monaco editor sets the css for a comment (it goes green). But I can't work out where that happens.

[BroKun]

I noticed this problem, it is caused by the configuration of monaco.

// type in monaco editor
quickSuggestions?: boolean | {
    other: boolean;
    comments: boolean;
    strings: boolean;
};
// editor preference
'editor.quickSuggestions': {
       'type': 'boolean',
       'default': true,
       'description': 'Enable quick suggestions (shadow suggestions)'
},

The value True means you will see suggestions anywhere.
We should not display suggestions by default in string and comment, just like vscode.

[akosyakov]

@BroKun can you handle it please? Please could you also reference a corresponding default configuration in VS Code, just to check that it is so.

[BroKun]

@BroKun can you handle it please? Please could you also reference a corresponding default configuration in VS Code, just to check that it is so.

Yes, I am doing this.
And I found that there is another problem, we need to pass the object that can be rewritten to monaco, especially when updating the configuration, but now the preferrenceService provides read-only objects.
I will solve this problem first, but it is better if the preferenceService can support it. Maybe I should open another issue.

[BroKun]

@vince-fugnitto This seems to have been resolved after #5931 and Monaco upgraded to 0.17.0.

[vince-fugnitto]

@vince-fugnitto This seems to have been resolved after #5931 and Monaco upgraded to 0.17.0.

I forgot to close, thank you!