feat(xml parser): Only allow angular syntax extensions if configured.

Configure via the public `angularSyntax` property on EasySAXParser and
the XmlParser wrapper.

js-libs/easysax/easysax.d.ts

@@ -5,6 +5,7 @@ declare module "js-libs/easysax" {
         parse(xml: string): void;
         on(name: string, cb: Function): void;
         ns(root: string, ns: any): void; 
+        public angularSyntax: boolean;
     }
 }
 

node-tests/test-angular-xml.ts

@@ -15,6 +15,7 @@ describe("angular xml parser", () => {
                     break;
             }
         });
+        parser.angularSyntax = true;
     });
 
     it("parses [property] binding", () => {
@@ -53,7 +54,6 @@ describe("angular xml parser", () => {
         assert.equal(last_attrs['text'], 'Name');
     });
 
-    return
     it("detects equals without value", () => {
         parser.parse("<TextField brokenTag= />");
 
@@ -71,4 +71,11 @@ describe("angular xml parser", () => {
 
         assert.isFalse(last_attrs);
     });
+
+    it("rejects angular properties if syntax disabled", () => {
+        parser.angularSyntax = false;
+        parser.parse("<TextField [text]='somevalue' />");
+
+        assert.isFalse(last_attrs);
+    });
 });

xml/xml.d.ts

@@ -86,7 +86,7 @@ declare module "xml" {
         * @param onError The callback to execute when a parser error occurs. The 'error' parameter contains the error.
         * @param processNamespaces Specifies whether namespaces should be processed.
         */
-        constructor(onEvent: (event: ParserEvent) => void, onError?: (error: Error) => void, processNamespaces?: boolean);
+        constructor(onEvent: (event: ParserEvent) => void, onError?: (error: Error) => void, processNamespaces?: boolean, angularSyntax?: boolean);
         
        /**
         * Parses the supplied xml string.
@@ -94,4 +94,4 @@ declare module "xml" {
         */
         parse(xmlString: string): void;
     }
-}
+}

xml/xml.ts

@@ -148,6 +148,14 @@ export class XmlParser implements definition.XmlParser {
         }
     }
 
+    public get angularSyntax() : boolean {
+        return this._parser.angularSyntax;
+    }
+
+    public set angularSyntax(value: boolean) {
+        this._parser.angularSyntax = value;
+    }
+
     public parse(xmlString: string): void {
         if (this._processNamespaces) {
             this._namespaceStack = [];