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// Copyright (c) 2021, Compiler Explorer Authors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
import * as monaco from 'monaco-editor';
import { Alert } from './alert';
import { getStoredSettings } from './settings';
import { FormatRequestOptions, FormatResponse } from './formatter-registry.interfaces';
import { SiteSettings } from './settings.interfaces';
// Proxy function to emit the error to the alert system
const onFormatError = (cause: string, source: string) => {
const alertSystem = new Alert();
alertSystem.notify(`We encountered an error formatting your code: ${cause}`, {
group: 'formatting',
alertClass: 'notification-error',
});
return source;
};
const getFormattedCode = async ({ source, formatterId, base, tabWidth, useSpaces }: FormatRequestOptions) => {
const res = await fetch(`${window.location.origin}${window.httpRoot}api/format/${formatterId}`, {
method: 'POST',
credentials: 'include',
headers: {
'Content-Type': 'application/json',
'Accept': 'application/json',
},
body: JSON.stringify({ source, base, tabWidth, useSpaces }),
});
const body = await res.json() as FormatResponse;
if (res.status === 200 && body.exit === 0) {
// API sent 200 and we have a valid response
return body.answer;
}
// We had an error (either HTTP request error, or API error)
// Figure out which it is, show it to the user, and reject the promise
const cause = body?.answer ?? res.statusText
throw new Error(cause);
};
/**
* Create a monaco DocumentFormattingEditProvider for a registered monaco
* language.
*
* @param language The monaco-editor registered language to format code for
* @param formatter The CE format API backend to use
* @param isOneTrueStyle Whether the CE format API backend has one true style
*/
const getDocumentFormatter = (
language: string,
formatter: string,
isOneTrueStyle: boolean,
): monaco.languages.DocumentFormattingEditProvider => ({
async provideDocumentFormattingEdits(
model: monaco.editor.ITextModel,
options: monaco.languages.FormattingOptions,
token: monaco.CancellationToken,
): Promise<monaco.languages.TextEdit[]> {
const settings: SiteSettings = getStoredSettings();
// If there is only one style, return __DefaultStyle.
const base = isOneTrueStyle ? '__DefaultStyle' : settings.formatBase;
const source = model.getValue();
// Request the formatted code. If that API call fails, we just back off
// and return the user's old code.
const formattedSource = await getFormattedCode({
formatterId: formatter,
tabWidth: settings.tabWidth,
useSpaces: settings.useSpaces,
source,
base,
}).catch(err => onFormatError(err, source));
return [{
range: model.getFullModelRange(),
text: formattedSource,
}];
},
});
/** Register a monaco-editor language's default document formatting provider */
const register = (lang: string, formatter: string, isOneTrueStyle: boolean) => {
const provider = getDocumentFormatter(lang, formatter, isOneTrueStyle);
monaco.languages.registerDocumentFormattingEditProvider(lang, provider);
}
register('cppp', 'clangformat', false);
register('nc', 'clangformat', false);
register('go', 'gofmt', true);
register('rust', 'rustfmt', true);
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