static/formatter-registry.ts

// Copyright (c) 2021, Compiler Explorer Authors
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are met:
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import $ from 'jquery';
import * as monaco from 'monaco-editor';
import { Promise } from "es6-promise";

import { Alert } from "./alert";

const getDocumentFormatter = (
    language: string,
    formatter: string,
    formatBase: string
): monaco.languages.DocumentFormattingEditProvider => ({
    provideDocumentFormattingEdits(
        model: monaco.editor.ITextModel,
        options: monaco.languages.FormattingOptions,
        token: monaco.CancellationToken
    ): Promise<monaco.languages.TextEdit[]> {
        const alertSystem = new Alert();
        return new Promise((resolve, reject) => {
            const source = model.getValue();
            $.ajax({
                type: 'POST',
                url: `${window.location.origin}${window.httpRoot}api/format/${formatter}`,
                dataType: 'json',
                contentType: 'application/json',
                data: JSON.stringify({
                    source,
                    base: formatBase,
                }),
                success: (result) => {
                    if (result.exit === 0) {
                        resolve([{
                            range: model.getFullModelRange(),
                            text: result.answer,
                        }]);
                    } else {
                        alertSystem.notify(`We encountered an error formatting your code: ${result.answer}`, {
                            group: 'formatting',
                            alertClass: 'notification-error',
                        });
                    }
                },
                error: (xhr, status, error) => {
                    // Hopefully we have not exploded!
                    if (xhr.responseText) {
                        try {
                            var res = JSON.parse(xhr.responseText);
                            error = res.answer || error;
                        } catch (e) {
                            // continue regardless of error
                        }
                    }
                    error = error || 'Unknown error';
                    alertSystem.notify(`We ran into some issues while formatting your code: ${error}`, {
                        group: 'formatting',
                        alertClass: 'notification-error',
                    });
                    reject();
                },
                cache: true,
            });
        });
    }
});

monaco.languages.registerDocumentFormattingEditProvider('cppp', getDocumentFormatter('cppp', 'clangformat', 'Google'));
monaco.languages.registerDocumentFormattingEditProvider('nc', getDocumentFormatter('nc', 'clangformat', 'Google'));
monaco.languages.registerDocumentFormattingEditProvider('rust', getDocumentFormatter('rust', 'rustfmt', 'None'));