typescript-formatter/lib/formatter.js

Formatter of TypeScript code

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var ts = require("typescript");
var utils_1 = require("./utils");
var LanguageServiceHost = /** @class */ (function () {
    function LanguageServiceHost() {
        var _this = this;
        this.files = {};
        // for ts.LanguageServiceHost
        this.getCompilationSettings = function () { return ts.getDefaultCompilerOptions(); };
        this.getScriptFileNames = function () { return Object.keys(_this.files); };
        this.getScriptVersion = function (_fileName) { return "0"; };
        this.getScriptSnapshot = function (fileName) { return _this.files[fileName]; };
        this.getCurrentDirectory = function () { return process.cwd(); };
        this.getDefaultLibFileName = function (options) { return ts.getDefaultLibFilePath(options); };
    }
    LanguageServiceHost.prototype.addFile = function (fileName, text) {
        this.files[fileName] = ts.ScriptSnapshot.fromString(text);
    };
    return LanguageServiceHost;
}());
function format(fileName, text, options) {
    if (options === void 0) { options = utils_1.createDefaultFormatCodeSettings(); }
    var host = new LanguageServiceHost();
    host.addFile(fileName, text);
    var languageService = ts.createLanguageService(host);
    var edits = languageService.getFormattingEditsForDocument(fileName, options);
    edits
        .sort(function (a, b) { return a.span.start - b.span.start; })
        .reverse()
        .forEach(function (edit) {
        var head = text.slice(0, edit.span.start);
        var tail = text.slice(edit.span.start + edit.span.length);
        text = "" + head + edit.newText + tail;
    });
    return text;
}
exports.format = format;
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