1 files changed, 72 insertions, 0 deletions
diff --git a/chromium/third_party/catapult/third_party/polymer3/bower_components/polymer/util/minimalDocument.js b/chromium/third_party/catapult/third_party/polymer3/bower_components/polymer/util/minimalDocument.js
new file mode 100644
index 00000000000..b40256e6bcc
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+++ b/chromium/third_party/catapult/third_party/polymer3/bower_components/polymer/util/minimalDocument.js
@@ -0,0 +1,72 @@
+/**
+ * @license
+ * Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+const dom5 = require('dom5');
+const parse5 = require('parse5');
+const {Transform} = require('stream');
+
+const p = dom5.predicates;
+
+function onlyOneLicense(doc) {
+  let comments = dom5.nodeWalkAll(doc, dom5.isCommentNode);
+  let hasLicense = false;
+  for (let i = 0; i < comments.length; i++) {
+    let c = comments[i];
+    let text = dom5.getTextContent(c);
+    if (text.indexOf('@license') === -1 || hasLicense) {
+      dom5.remove(c);
+    } else {
+      hasLicense = true;
+    }
+  }
+}
+
+const blankRx = /^\s+$/;
+
+const isBlankNode = p.AND(dom5.isTextNode, (t) => blankRx.test(dom5.getTextContent(t)));
+
+class MinimalDocTransform extends Transform {
+  constructor() {
+    super({objectMode: true});
+  }
+  _transform(file, enc, cb) {
+    let doc = parse5.parse(String(file.contents), {locationInfo: true});
+    let vulc = dom5.query(doc, p.AND(p.hasTagName('div'), p.hasAttr('by-polymer-bundler'), p.hasAttr('hidden')));
+    let charset = dom5.query(doc, p.AND(p.hasTagName('meta'), p.hasAttrValue('charset', 'UTF-8')));
+
+    if (charset) {
+      dom5.remove(charset);
+    }
+
+    dom5.removeNodeSaveChildren(vulc);
+
+    let scripts = dom5.queryAll(doc, p.hasTagName('script'));
+    let collector = scripts[0];
+    let contents = [dom5.getTextContent(collector)];
+    for (let i = 1, s; i < scripts.length; i++) {
+      s = scripts[i];
+      dom5.remove(s);
+      contents.push(dom5.getTextContent(s));
+    }
+    dom5.setTextContent(collector, contents.join(''));
+
+    onlyOneLicense(doc);
+
+    dom5.removeFakeRootElements(doc);
+
+    dom5.nodeWalkAll(doc, isBlankNode).forEach((t) => dom5.remove(t));
+
+    file.contents = new Buffer(parse5.serialize(doc));
+
+    cb(null, file);
+  }
+}
+
+module.exports = () => new MinimalDocTransform();