Source code
Revision control
Copy as Markdown
Other Tools
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
"use strict";
const lazy = {};
ChromeUtils.defineESModuleGetters(
lazy,
{
},
{ global: "contextual" }
);
/**
* Gets a collection of parser methods for a specified source.
*
* @param string source
* The source text content.
* @param boolean logExceptions
*/
function getSyntaxTrees(source, logExceptions) {
// The source may not necessarily be JS, in which case we need to extract
// all the scripts. Fastest/easiest way is with a regular expression.
// Don't worry, the rules of using a <script> tag are really strict,
// this will work.
const regexp = /<script[^>]*?(?:>([^]*?)<\/script\s*>|\/>)/gim;
const syntaxTrees = [];
const scriptMatches = [];
let scriptMatch;
if (source.match(/^\s*</)) {
// First non whitespace character is <, so most definitely HTML.
while ((scriptMatch = regexp.exec(source))) {
// Contents are captured at index 1 or nothing: Self-closing scripts
// won't capture code content
scriptMatches.push(scriptMatch[1] || "");
}
}
// If there are no script matches, send the whole source directly to the
// reflection API to generate the AST nodes.
if (!scriptMatches.length) {
// Reflect.parse throws when encounters a syntax error.
try {
syntaxTrees.push(lazy.Reflect.parse(source));
} catch (e) {
if (logExceptions) {
DevToolsUtils.reportException("Parser:get", e);
}
}
} else {
// Generate the AST nodes for each script.
for (const script of scriptMatches) {
// Reflect.parse throws when encounters a syntax error.
try {
syntaxTrees.push(lazy.Reflect.parse(script));
} catch (e) {
if (logExceptions) {
DevToolsUtils.reportException("Parser:get", e);
}
}
}
}
return syntaxTrees;
}
exports.getSyntaxTrees = getSyntaxTrees;