How to default to given OpenHandler

vincent · 23 February 2021 09:36

Hi,

I added an OpenHandler to my extension following TypeFox’s instructions:

TypeFox/theia-workshop/blob/solution-1/jsonschema-form-extension/src/browser/jsonschema-form-open-handler.ts

import { WidgetOpenHandler } from "@theia/core/lib/browser";
import { JsonschemaFormWidget, JsonschemaFormWidgetOptions } from "./jsonschema-form-widget";
import URI from "@theia/core/lib/common/uri";
import { injectable, inject } from "inversify";
import { EditorManager } from "@theia/editor/lib/browser";

@injectable()
export class JsonschemaFormOpenHandler extends WidgetOpenHandler<JsonschemaFormWidget> {
    
    readonly id = JsonschemaFormWidget.id;
    readonly label = "Form";

    @inject(EditorManager)
    protected readonly editorManager: EditorManager;

    canHandle(uri: URI): number {
        if (uri.path.ext !== '.json') {
            return 0;
        }
        if (uri.path.name.endsWith('-data')) {

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It works as expected when right clicking a file and using “Open With”.

However, I would like to open all JSON files (in my case) with the custom editor by default. If I double click a JSON file, it opens in the regular Monaco editor. I do return 100 in my implementation of canHandle.

Did I miss something?

Thanks!

kittaakos · 23 February 2021 09:48

Try to increase it. The default Code editor open handler uses 100.

github.com

eclipse-theia/theia/blob/f66bc8cddf2a4f8bb68184f1e4b0bbf23a798fd3/packages/editor/src/browser/editor-manager.ts#L135-L137


canHandle(uri: URI, options?: WidgetOpenerOptions): number {
    return 100;
}

vincent · 23 February 2021 09:59

101 did the trick!

Is the default value defined as a constant somewhere? I’d like to retrieve it and add 1 in order to be more explicit.

kittaakos · 23 February 2021 10:15

No, it isn’t.