XFA - Add a parser for XFA files

- the parser is base on a class extending XMLParserBase
 - it handle xml namespaces:
   * each namespace is assocated with a builder
   * builder builds nodes belonging to the namespace
   * when a node is inserted in the parent namespace compatibility is checked (if required)
 - to avoid name collision between xml names and object properties, use Symbol.

test/unit/clitests.json

@@ -39,6 +39,7 @@
     "unicode_spec.js",
     "util_spec.js",
     "writer_spec.js",
+    "xfa_parser_spec.js",
     "xml_spec.js"
   ]
 }

test/unit/jasmine-boot.js

@@ -85,6 +85,7 @@ async function initializePDFJS(callback) {
       "pdfjs-test/unit/unicode_spec.js",
       "pdfjs-test/unit/util_spec.js",
       "pdfjs-test/unit/writer_spec.js",
+      "pdfjs-test/unit/xfa_parser_spec.js",
       "pdfjs-test/unit/xml_spec.js",
     ].map(function (moduleName) {
       // eslint-disable-next-line no-unsanitized/method

test/unit/xfa_parser_spec.js

@@ -0,0 +1,93 @@
+/* Copyright 2020 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { $dump } from "../../src/core/xfa/xfa_object.js";
+import { XFAParser } from "../../src/core/xfa/parser.js";
+
+describe("XFAParser", function () {
+  describe("Parse XFA", function () {
+    it("should parse a xfa document and create an object to represent it", function () {
+      const xml = `
+<?xml version="1.0"?>
+<xdp:xdp xmlns:xdp="http://ns.adobe.com/xdp/" uuid="1234" invalid="foo">
+  <config xmlns="http://www.xfa.org/schema/xci/3.1/">
+    <present>
+      <pdf name="hello">
+        <adobeExtensionLevel>
+          7
+        </adobeExtensionLevel>
+      </pdf>
+      <invalid><a>foobar</a></invalid>
+    </present>
+    <acrobat>
+      <submitUrl>http://a.b.c</submitUrl>
+      <acrobat7>
+        <dynamicRender>
+          forbidden
+        </dynamicRender>
+      </acrobat7>
+      <autoSave>enabled</autoSave>      
+      <submitUrl>
+                 http://d.e.f
+      </submitUrl>
+      <submitUrl>http://g.h.i</submitUrl>
+      <validate>foobar</validate>
+    </acrobat>
+  </config>
+</xdp:xdp>
+      `;
+      const root = new XFAParser().parse(xml);
+      const expected = {
+        uuid: "1234",
+        timeStamp: "",
+        config: {
+          acrobat: {
+            acrobat7: {
+              dynamicRender: {
+                $content: "forbidden",
+              },
+            },
+            autoSave: {
+              $content: "enabled",
+            },
+            validate: {
+              $content: "preSubmit",
+            },
+            submitUrl: [
+              {
+                $content: "http://a.b.c",
+              },
+              {
+                $content: "http://d.e.f",
+              },
+              {
+                $content: "http://g.h.i",
+              },
+            ],
+          },
+          present: {
+            pdf: {
+              name: "hello",
+              adobeExtensionLevel: {
+                $content: 7,
+              },
+            },
+          },
+        },
+      };
+      expect(root[$dump]()).toEqual(expected);
+    });
+  });
+});