Bug 429739 - Permission denied to access property ''

Add a helper class to evaluate javascript in a chrome context for
XULRunner >=24

Change-Id: I5aa80883c3b2793ee8dc675e75f21863738cb469
Signed-off-by: mjgp2 <matthew.painter@import.io>

1 files changed, 81 insertions, 0 deletions

diff --git a/bundles/org.eclipse.swt/Eclipse SWT Mozilla/common/org/eclipse/swt/browser/MozillaEvaluator.java b/bundles/org.eclipse.swt/Eclipse SWT Mozilla/common/org/eclipse/swt/browser/MozillaEvaluator.java
new file mode 100644
index 0000000000..297a261498
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT Mozilla/common/org/eclipse/swt/browser/MozillaEvaluator.java
@@ -0,0 +1,81 @@
+/*******************************************************************************
+ * Copyright (c) 2015 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Matthew Painter <matthew.painter@import.io>
+ *******************************************************************************/
+package org.eclipse.swt.browser;
+
+import org.eclipse.swt.*;
+import org.eclipse.swt.internal.mozilla.*;
+
+/**
+ * Helper class to evaluate javascript in XULRunner >=24
+ * @since 3.104
+ */
+public class MozillaEvaluator {
+	
+	/**	 
+	 * Allows evaluation of javascript in XULRunner >=24 in a chrome security context.
+	 * Execution in XULRunner <= 24 is in this security context by default.
+	 *
+	 * @param browser the browser which should be the value of the "window" variable in the script execution context
+	 * @param script the javascript to be evaluated.
+	 *
+	 * @exception IllegalArgumentException <ul>
+	 *    <li>ERROR_NULL_ARGUMENT - if the browser or javascript is null</li>
+	 *    <li>ERROR_INVALID_ARGUMENT - if the version of XULRunner < 24</li>
+	 * </ul>
+	 *@since 3.104
+	 */
+	public static Object evaluateAsChrome (Browser browser, String script) {
+		
+		if (browser == null || script == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
+		if ((browser.getStyle() & SWT.MOZILLA) == 0) SWT.error (SWT.ERROR_INVALID_ARGUMENT);
+		if (!MozillaVersion.CheckVersion (MozillaVersion.VERSION_XR24, false)) SWT.error (SWT.ERROR_INVALID_ARGUMENT);
+		
+		Mozilla mozillaWebBrowser = (Mozilla) browser.webBrowser;
+		nsIWebBrowser webBrowser = mozillaWebBrowser.webBrowser;
+		
+		long /*int*/[] result = new long /*int*/[1];
+		int rc = webBrowser.QueryInterface(IIDStore.GetIID (nsIInterfaceRequestor.class), result);
+		if (rc != XPCOM.NS_OK) Mozilla.error (rc);
+		if (result[0] == 0) Mozilla.error (XPCOM.NS_NOINTERFACE);
+		nsIInterfaceRequestor interfaceRequestor = new nsIInterfaceRequestor (result[0]);
+		result[0] = 0;
+		rc = XPCOM.NS_GetServiceManager (result);
+		if (rc != XPCOM.NS_OK) Mozilla.error (rc);
+		if (result[0] == 0) Mozilla.error (XPCOM.NS_NOINTERFACE);
+	
+		nsIServiceManager serviceManager = new nsIServiceManager (result[0]);
+		result[0] = 0;
+		rc = interfaceRequestor.GetInterface (IIDStore.GetIID (nsIDOMWindow.class), result);
+		interfaceRequestor.Release ();
+		if (rc != XPCOM.NS_OK) Mozilla.error (rc);
+		if (result[0] == 0) Mozilla.error (XPCOM.NS_NOINTERFACE);
+	
+		nsIDOMWindow window = new nsIDOMWindow (result[0]);
+		result[0] = 0;
+		byte[] aContractID = MozillaDelegate.wcsToMbcs (null, XPCOM.EXECUTE_CONTRACTID, true);
+		rc = serviceManager.GetServiceByContractID (aContractID, IIDStore.GetIID (Execute.class), result);
+		if (rc != XPCOM.NS_OK) Mozilla.error (rc);
+		if (result[0] == 0) Mozilla.error (XPCOM.NS_NOINTERFACE);
+	
+		Execute execute = new Execute (result[0]);
+		result[0] = 0;
+		nsEmbedString data = new nsEmbedString ("(function(){" + script + "}())");
+		execute.EvalAsChrome(window, data, result);
+		data.dispose ();
+		execute.Release ();
+		if (result[0] == 0) return null;
+	
+		nsIVariant variant = new nsIVariant (result[0]);
+		Object retval = External.convertToJava( variant);
+		variant.Release ();
+		return retval;
+	}
+}