static/codelens-handler.ts

// Copyright (c) 2020, 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:
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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import _ from 'underscore';
import * as monaco from 'monaco-editor';

interface RegisteredCodeLens {
    compilerId: number;
    editorModel: monaco.editor.ITextModel;
    lenses: monaco.languages.CodeLens[];
}

let registeredCodelenses: RegisteredCodeLens[] = [];
const providersPerLanguage: Record<string, monaco.IDisposable> = {};

export function registerLensesForCompiler(
    compilerId: number,
    editorModel: monaco.editor.ITextModel,
    lenses: monaco.languages.CodeLens[]): void {
    const item: RegisteredCodeLens = _.find(registeredCodelenses, (item: RegisteredCodeLens): boolean => {
        return item.compilerId === compilerId;
    });

    if (item) {
        item.lenses = lenses;
    } else {
        registeredCodelenses.push({
            compilerId: compilerId,
            editorModel: editorModel,
            lenses: lenses,
        });
    }
}

function provide(model: monaco.editor.ITextModel): monaco.languages.CodeLensList {
    const item: RegisteredCodeLens = _.find(registeredCodelenses, (item: RegisteredCodeLens): boolean => {
        return item.editorModel === model;
    });

    if (item) {
        return {
            lenses: item.lenses,
            dispose: function () {},
        };
    } else {
        return {
            lenses: [],
            dispose: function () {},
        };
    }
}

export function unregister(compilerId: number): void {
    const item: RegisteredCodeLens = _.find(registeredCodelenses, (item: RegisteredCodeLens): boolean => {
        return item.compilerId === compilerId;
    });

    if (item) {
        registeredCodelenses = _.without(registeredCodelenses, item);
    }
}

export function registerProviderForLanguage(language: string): void {
    if (!providersPerLanguage[language]) {
        providersPerLanguage[language] = monaco.languages.registerCodeLensProvider(language, {
            provideCodeLenses: provide,
        });
    }
}