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-rw-r--r--devtools/shared/webconsole/parser-helper.js66
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diff --git a/devtools/shared/webconsole/parser-helper.js b/devtools/shared/webconsole/parser-helper.js
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+/* 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
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const DevToolsUtils = require("resource://devtools/shared/DevToolsUtils.js");
+const lazy = {};
+ChromeUtils.defineESModuleGetters(lazy, {
+ Reflect: "resource://gre/modules/reflect.sys.mjs",
+});
+
+/**
+ * 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 &lt, 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;