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// @flow
/**
* Utils for working with Source URLs
* @module utils/source
*/
import { endTruncateStr } from "./utils";
import { basename } from "../utils/path";
import { parse as parseURL } from "url";
import type { Source } from "../types";
/**
* Trims the query part or reference identifier of a url string, if necessary.
*
* @memberof utils/source
* @static
*/
function trimUrlQuery(url: string): string {
let length = url.length;
let q1 = url.indexOf("?");
let q2 = url.indexOf("&");
let q3 = url.indexOf("#");
let q = Math.min(
q1 != -1 ? q1 : length,
q2 != -1 ? q2 : length,
q3 != -1 ? q3 : length
);
return url.slice(0, q);
}
/**
* Returns true if the specified url and/or content type are specific to
* javascript files.
*
* @return boolean
* True if the source is likely javascript.
*
* @memberof utils/source
* @static
*/
function isJavaScript(url: ?string, contentType: string = ""): boolean {
return (
(url && /\.(jsm|js)?$/.test(trimUrlQuery(url))) ||
contentType.includes("javascript")
);
}
/**
* @memberof utils/source
* @static
*/
function isPretty(source: Source): boolean {
return source.url ? /formatted$/.test(source.url) : false;
}
/**
* @memberof utils/source
* @static
*/
function getPrettySourceURL(url: ?string): string {
if (!url) {
url = "";
}
return `${url}:formatted`;
}
/**
* @memberof utils/source
* @static
*/
function getRawSourceURL(url: string): string {
return url.replace(/:formatted$/, "");
}
function getFilenameFromURL(url: string) {
url = getRawSourceURL(url || "");
const name = basename(url) || "(index)";
return endTruncateStr(name, 50);
}
/**
* Show a source url's filename.
* If the source does not have a url, use the source id.
*
* @memberof utils/source
* @static
*/
function getFilename(source: Source) {
let { url, id } = source;
if (!url) {
const sourceId = id.split("/")[1];
return `SOURCE${sourceId}`;
}
return getFilenameFromURL(url);
}
const contentTypeModeMap = {
"text/javascript": { name: "javascript" },
"text/typescript": { name: "javascript", typescript: true },
"text/coffeescript": "coffeescript",
"text/typescript-jsx": {
name: "jsx",
base: { name: "javascript", typescript: true }
},
"text/jsx": "jsx",
"text/x-elm": "elm",
"text/x-clojure": "clojure",
"text/wasm": { name: "text" },
"text/html": { name: "htmlmixed" }
};
function getSourcePath(source: Source) {
if (!source.url) {
return "";
}
const { path, href } = parseURL(source.url);
// for URLs like "about:home" the path is null so we pass the full href
return path || href;
}
/**
* Returns amount of lines in the source. If source is a WebAssembly binary,
* the function returns amount of bytes.
*/
function getSourceLineCount(source: Source) {
if (source.isWasm) {
const { binary } = (source.text: any);
return binary.length;
}
return source.text != undefined ? source.text.split("\n").length : 0;
}
/**
*
* Returns Code Mirror mode for source content type
* @param contentType
* @return String
* @memberof utils/source
* @static
*/
function getMode(source: Source) {
const { contentType, text, isWasm } = source;
if (!text || isWasm) {
return { name: "text" };
}
// Use HTML mode for files in which the first non whitespace
// character is `<` regardless of extension.
const isHTMLLike = text.match(/^\s*</);
if (!contentType) {
if (isHTMLLike) {
return { name: "htmlmixed" };
}
return { name: "text" };
}
// // @flow or /* @flow */
if (text.match(/^\s*(\/\/ @flow|\/\* @flow \*\/)/)) {
return contentTypeModeMap["text/typescript"];
}
if (/script|elm|jsx|clojure|wasm|html/.test(contentType)) {
if (contentType in contentTypeModeMap) {
return contentTypeModeMap[contentType];
}
return contentTypeModeMap["text/javascript"];
}
if (isHTMLLike) {
return { name: "htmlmixed" };
}
return { name: "text" };
}
export {
isJavaScript,
isPretty,
getPrettySourceURL,
getRawSourceURL,
getFilename,
getFilenameFromURL,
getSourcePath,
getSourceLineCount,
getMode
};