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• WebKit.java

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org.eclipse.swt.browser.WebKit Maven / Gradle / Ivy

/*******************************************************************************
 * Copyright (c) 2011, 2016 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.browser;

import java.nio.charset.*;
import java.util.*;

import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.cocoa.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

@SuppressWarnings({"rawtypes"})
class WebKit extends WebBrowser {
	WebView webView;
	WebPreferences preferences;
	SWTWebViewDelegate delegate;
	boolean loadingText, untrustedText;
	String lastHoveredLinkURL, lastNavigateURL;
	String html;
	long /*int*/ identifier;
	int resourceCount;
	String url = ""; //$NON-NLS-1$
	Point location;
	Point size;
	boolean statusBar = true, toolBar = true, ignoreDispose;
	int lastMouseMoveX, lastMouseMoveY;
	//TEMPORARY CODE
//	boolean doit;

	static long /*int*/ delegateClass;
	static boolean Initialized;
	// the following Callbacks are never freed
	static Callback Callback3, Callback4, Callback5, Callback6, Callback7;

	static final int MIN_SIZE = 16;
	static final int MAX_PROGRESS = 100;
	static final String WebElementLinkURLKey = "WebElementLinkURL"; //$NON-NLS-1$
	static final String AGENT_STRING = "Safari/522.0"; /* Safari version on OSX 10.5 initial release */ //$NON-NLS-1$
	static final String URI_FILEROOT = "file:///"; //$NON-NLS-1$
	static final String PROTOCOL_FILE = "file://"; //$NON-NLS-1$
	static final String PROTOCOL_HTTP = "http://"; //$NON-NLS-1$
	static final String ABOUT_BLANK = "about:blank"; //$NON-NLS-1$
	static final String HEADER_SETCOOKIE = "Set-Cookie"; //$NON-NLS-1$
	static final String POST = "POST"; //$NON-NLS-1$
	static final String USER_AGENT = "user-agent"; //$NON-NLS-1$
	static final String ADD_WIDGET_KEY = "org.eclipse.swt.internal.addWidget"; //$NON-NLS-1$
	static final String WEBKIT_EVENTS_FIX_KEY = "org.eclipse.swt.internal.webKitEventsFix"; //$NON-NLS-1$
	static final byte[] SWT_OBJECT = {'S', 'W', 'T', '_', 'O', 'B', 'J', 'E', 'C', 'T', '\0'};

	/* event strings */
	static final String DOMEVENT_KEYUP = "keyup"; //$NON-NLS-1$
	static final String DOMEVENT_KEYDOWN = "keydown"; //$NON-NLS-1$
	static final String DOMEVENT_MOUSEDOWN = "mousedown"; //$NON-NLS-1$
	static final String DOMEVENT_MOUSEUP = "mouseup"; //$NON-NLS-1$
	static final String DOMEVENT_MOUSEMOVE = "mousemove"; //$NON-NLS-1$
	static final String DOMEVENT_MOUSEWHEEL = "mousewheel"; //$NON-NLS-1$

	static {
		NativeClearSessions = () -> {
			NSHTTPCookieStorage storage = NSHTTPCookieStorage.sharedHTTPCookieStorage();
			NSArray cookies = storage.cookies();
			int count = (int)/*64*/cookies.count ();
			for (int i = 0; i < count; i++) {
				NSHTTPCookie cookie = new NSHTTPCookie(cookies.objectAtIndex(i));
				if (cookie.isSessionOnly()) {
					storage.deleteCookie(cookie);
				}
			}
		};

		NativeGetCookie = () -> {
			NSHTTPCookieStorage storage = NSHTTPCookieStorage.sharedHTTPCookieStorage ();
			NSURL url = NSURL.URLWithString (NSString.stringWith (CookieUrl));
			NSArray cookies = storage.cookiesForURL (url);
			int count = (int)/*64*/cookies.count ();
			if (count == 0) return;

			NSString name = NSString.stringWith (CookieName);
			for (int i = 0; i < count; i++) {
				NSHTTPCookie current = new NSHTTPCookie (cookies.objectAtIndex (i));
				if (current.name ().compare (name) == OS.NSOrderedSame) {
					CookieValue = current.value ().getString ();
					return;
				}
			}
		};

		NativeSetCookie = () -> {
			NSURL url = NSURL.URLWithString (NSString.stringWith (CookieUrl));
			NSMutableDictionary headers = NSMutableDictionary.dictionaryWithCapacity (1);
			headers.setValue (NSString.stringWith (CookieValue), NSString.stringWith (HEADER_SETCOOKIE));
			NSArray cookies = NSHTTPCookie.cookiesWithResponseHeaderFields (headers, url);
			if (cookies.count () == 0) return;
			NSHTTPCookieStorage storage = NSHTTPCookieStorage.sharedHTTPCookieStorage ();
			NSHTTPCookie cookie = new NSHTTPCookie (cookies.objectAtIndex (0));
			storage.setCookie (cookie);
			CookieResult = true;
		};

		if (NativePendingCookies != null) {
			SetPendingCookies (NativePendingCookies);
		}
		NativePendingCookies = null;
	}

@Override
public void create (Composite parent, int style) {
	if (delegateClass == 0) {
		Class webKitClass = this.getClass();
		Callback3 = new Callback(webKitClass, "browserProc", 3); //$NON-NLS-1$
		long /*int*/ proc3 = Callback3.getAddress();
		if (proc3 == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);
		Callback4 = new Callback(webKitClass, "browserProc", 4); //$NON-NLS-1$
		long /*int*/ proc4 = Callback4.getAddress();
		if (proc4 == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);
		Callback5 = new Callback(webKitClass, "browserProc", 5); //$NON-NLS-1$
		long /*int*/ proc5 = Callback5.getAddress();
		if (proc5 == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);
		Callback6 = new Callback(webKitClass, "browserProc", 6); //$NON-NLS-1$
		long /*int*/ proc6 = Callback6.getAddress();
		if (proc6 == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);
		Callback7 = new Callback(webKitClass, "browserProc", 7); //$NON-NLS-1$
		long /*int*/ proc7 = Callback7.getAddress();
		if (proc7 == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);
		long /*int*/ setFrameProc = OS.CALLBACK_webView_setFrame_(proc4);
		if (setFrameProc == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);

		String className = "SWTWebViewDelegate"; //$NON-NLS-1$
		byte[] types = {'*','\0'};
		int size = C.PTR_SIZEOF, align = C.PTR_SIZEOF == 4 ? 2 : 3;
		delegateClass = OS.objc_allocateClassPair (OS.class_NSObject, className, 0);

		OS.class_addIvar(delegateClass, SWT_OBJECT, size, (byte)align, types);
		OS.class_addMethod(delegateClass, OS.sel_webView_didChangeLocationWithinPageForFrame_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_didFailProvisionalLoadWithError_forFrame_, proc5, "@:@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_didFinishLoadForFrame_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_didReceiveTitle_forFrame_, proc5, "@:@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_didStartProvisionalLoadForFrame_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_didCommitLoadForFrame_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_resource_didFinishLoadingFromDataSource_, proc5, "@:@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_resource_didReceiveAuthenticationChallenge_fromDataSource_, proc6, "@:@@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_resource_didFailLoadingWithError_fromDataSource_, proc6, "@:@@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_identifierForInitialRequest_fromDataSource_, proc5, "@:@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_resource_willSendRequest_redirectResponse_fromDataSource_, proc7, "@:@@@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_createWebViewWithRequest_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webViewShow_, proc3, "@:@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webViewClose_, proc3, "@:@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_contextMenuItemsForElement_defaultMenuItems_, proc5, "@:@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_setStatusBarVisible_, proc4, "@:@B"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_setResizable_, proc4, "@:@B"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_setToolbarsVisible_, proc4, "@:@B"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_setStatusText_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webViewFocus_, proc3, "@:@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webViewUnfocus_, proc3, "@:@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_runBeforeUnloadConfirmPanelWithMessage_initiatedByFrame_, proc5, "@:@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_runJavaScriptAlertPanelWithMessage_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_runJavaScriptAlertPanelWithMessage_initiatedByFrame_, proc5, "@:@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_runJavaScriptConfirmPanelWithMessage_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_runJavaScriptConfirmPanelWithMessage_initiatedByFrame_, proc5, "@:@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_runOpenPanelForFileButtonWithResultListener_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_mouseDidMoveOverElement_modifierFlags_, proc5, "@:@@I"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_printFrameView_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_decidePolicyForMIMEType_request_frame_decisionListener_, proc7, "@:@@@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_decidePolicyForNavigationAction_request_frame_decisionListener_, proc7, "@:@@@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_decidePolicyForNewWindowAction_request_newFrameName_decisionListener_, proc7, "@:@@@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_unableToImplementPolicyWithError_frame_, proc5, "@:@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_download_decideDestinationWithSuggestedFilename_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_handleEvent_, proc3, "@:@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_setFrame_, setFrameProc, "@:@{NSRect}"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_webView_windowScriptObjectAvailable_, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_callJava, proc6, "@:@@@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_callRunBeforeUnloadConfirmPanelWithMessage, proc4, "@:@@"); //$NON-NLS-1$
		OS.class_addMethod(delegateClass, OS.sel_createPanelDidEnd, proc5, "@:@@@"); //$NON-NLS-1$
		OS.objc_registerClassPair(delegateClass);

 		long /*int*/ metaClass = OS.objc_getMetaClass (className);
		OS.class_addMethod(metaClass, OS.sel_isSelectorExcludedFromWebScript_, proc3, "@:@"); //$NON-NLS-1$
		OS.class_addMethod(metaClass, OS.sel_webScriptNameForSelector_, proc3, "@:@"); //$NON-NLS-1$
	}

	/*
	* Override the default event mechanism to not send key events so
	* that the browser can send them by listening to the DOM instead.
	*/
	browser.setData(WEBKIT_EVENTS_FIX_KEY);

	WebView webView = (WebView)new WebView().alloc();
	if (webView == null) SWT.error(SWT.ERROR_NO_HANDLES);
	webView.initWithFrame(browser.view.frame(), null, null);
	webView.setAutoresizingMask(OS.NSViewWidthSizable | OS.NSViewHeightSizable);
	if (webView.respondsToSelector(OS.sel__setDashboardBehavior)) {
		OS.objc_msgSend(webView.id, OS.sel__setDashboardBehavior, 2, 1);
	}
	final SWTWebViewDelegate delegate = (SWTWebViewDelegate)new SWTWebViewDelegate().alloc().init();
	Display display = browser.getDisplay();
	display.setData(ADD_WIDGET_KEY, new Object[] {delegate, browser});
	this.delegate = delegate;
	this.webView = webView;
	browser.view.addSubview(webView);

	Listener listener = e -> {
		switch (e.type) {
			case SWT.FocusIn:
				WebKit.this.webView.window().makeFirstResponder(WebKit.this.webView);
				break;
			case SWT.Dispose: {
				/* make this handler run after other dispose listeners */
				if (ignoreDispose) {
					ignoreDispose = false;
					break;
				}
				ignoreDispose = true;
				browser.notifyListeners (e.type, e);
				e.type = SWT.NONE;

				/* Browser could have been disposed by one of the Dispose listeners */
				if (!browser.isDisposed()) {
					/* invoke onbeforeunload handlers */
					if (!browser.isClosing) {
						close (false);
					}

					e.display.setData(ADD_WIDGET_KEY, new Object[] {delegate, null});
				}

				WebKit.this.webView.setFrameLoadDelegate(null);
				WebKit.this.webView.setResourceLoadDelegate(null);
				WebKit.this.webView.setUIDelegate(null);
				WebKit.this.webView.setPolicyDelegate(null);
				WebKit.this.webView.setDownloadDelegate(null);

				WebKit.this.webView.release();
				WebKit.this.webView = null;
				WebKit.this.delegate.release();
				WebKit.this.delegate = null;
				html = null;
				lastHoveredLinkURL = lastNavigateURL = null;

				Iterator elements = functions.values().iterator ();
				while (elements.hasNext ()) {
					elements.next ().dispose (false);
				}
				functions = null;

				if (preferences != null) preferences.release ();
				preferences = null;
				break;
			}
		}
	};
	browser.addListener(SWT.Dispose, listener);
	browser.addListener(SWT.KeyDown, listener); /* needed for tabbing into the Browser */
	browser.addListener(SWT.FocusIn, listener);

	webView.setFrameLoadDelegate(delegate);
	webView.setResourceLoadDelegate(delegate);
	webView.setUIDelegate(delegate);
	webView.setPolicyDelegate(delegate);
	webView.setDownloadDelegate(delegate);
	webView.setApplicationNameForUserAgent(NSString.stringWith(AGENT_STRING));

	if (!Initialized) {
		Initialized = true;
		/* disable applets */
		WebPreferences.standardPreferences().setJavaEnabled(false);
	}
}

@Override
public boolean back() {
	html = null;
	return webView.goBack();
}

static long /*int*/ browserProc(long /*int*/ id, long /*int*/ sel, long /*int*/ arg0) {
	if (id == delegateClass) {
		if (sel == OS.sel_isSelectorExcludedFromWebScript_) {
			return isSelectorExcludedFromWebScript (arg0) ? 1 : 0;
		} else if (sel == OS.sel_webScriptNameForSelector_) {
			return webScriptNameForSelector (arg0);
		}
	}

	Display d = Display.getCurrent();
	if (d == null || d.isDisposed()) return 0;
	Widget widget = d.findWidget(id);
	if (widget == null) return 0;
	WebKit webKit = (WebKit)((Browser)widget).webBrowser;
	if (sel == OS.sel_webViewShow_) {
		webKit.webViewShow(arg0);
	} else if (sel == OS.sel_webViewClose_) {
		webKit.webViewClose(arg0);
	} else if (sel == OS.sel_webViewFocus_) {
		webKit.webViewFocus(arg0);
	} else if (sel == OS.sel_webViewUnfocus_) {
		webKit.webViewUnfocus(arg0);
	} else if (sel == OS.sel_handleEvent_) {
		webKit.handleEvent(arg0);
	}
	return 0;
}

static long /*int*/ browserProc(long /*int*/ id, long /*int*/ sel, long /*int*/ arg0, long /*int*/ arg1) {
	Display d = Display.getCurrent();
	if (d == null || d.isDisposed()) return 0;
	Widget widget = d.findWidget(id);
	if (widget == null) return 0;
	WebKit webKit = (WebKit)((Browser)widget).webBrowser;
	if (sel == OS.sel_webView_didChangeLocationWithinPageForFrame_) {
		webKit.webView_didChangeLocationWithinPageForFrame(arg0, arg1);
	} else if (sel == OS.sel_webView_didFinishLoadForFrame_) {
		webKit.webView_didFinishLoadForFrame(arg0, arg1);
	} else if (sel == OS.sel_webView_didStartProvisionalLoadForFrame_) {
		webKit.webView_didStartProvisionalLoadForFrame(arg0, arg1);
	} else if (sel == OS.sel_webView_didCommitLoadForFrame_) {
		webKit.webView_didCommitLoadForFrame(arg0, arg1);
	} else if (sel == OS.sel_webView_setFrame_) {
		webKit.webView_setFrame(arg0, arg1);
	} else if (sel == OS.sel_webView_createWebViewWithRequest_) {
		return webKit.webView_createWebViewWithRequest(arg0, arg1);
	} else if (sel == OS.sel_webView_setStatusBarVisible_) {
		webKit.webView_setStatusBarVisible(arg0, arg1 != 0);
	} else if (sel == OS.sel_webView_setResizable_) {
		webKit.webView_setResizable(arg0, arg1 != 0);
	} else if (sel == OS.sel_webView_setStatusText_) {
		webKit.webView_setStatusText(arg0, arg1);
	} else if (sel == OS.sel_webView_setToolbarsVisible_) {
		webKit.webView_setToolbarsVisible(arg0, arg1 != 0);
	} else if (sel == OS.sel_webView_runJavaScriptAlertPanelWithMessage_) {
		webKit.webView_runJavaScriptAlertPanelWithMessage(arg0, arg1);
	} else if (sel == OS.sel_webView_runJavaScriptConfirmPanelWithMessage_) {
		return webKit.webView_runJavaScriptConfirmPanelWithMessage(arg0, arg1);
	} else if (sel == OS.sel_webView_runOpenPanelForFileButtonWithResultListener_) {
		webKit.webView_runOpenPanelForFileButtonWithResultListener(arg0, arg1);
	} else if (sel == OS.sel_download_decideDestinationWithSuggestedFilename_) {
		webKit.download_decideDestinationWithSuggestedFilename(arg0, arg1);
	} else if (sel == OS.sel_webView_printFrameView_) {
		webKit.webView_printFrameView(arg0, arg1);
	} else if (sel == OS.sel_webView_windowScriptObjectAvailable_) {
		webKit.webView_windowScriptObjectAvailable (arg0, arg1);
	} else if (sel == OS.sel_callRunBeforeUnloadConfirmPanelWithMessage) {
		return webKit.callRunBeforeUnloadConfirmPanelWithMessage (arg0, arg1).id;
	}
	return 0;
}

static long /*int*/ browserProc(long /*int*/ id, long /*int*/ sel, long /*int*/ arg0, long /*int*/ arg1, long /*int*/ arg2) {
	Display d = Display.getCurrent();
	if (d == null || d.isDisposed()) return 0;
	Widget widget = d.findWidget(id);
	if (widget == null) return 0;
	WebKit webKit = (WebKit)((Browser)widget).webBrowser;
	if (sel == OS.sel_webView_didFailProvisionalLoadWithError_forFrame_) {
		webKit.webView_didFailProvisionalLoadWithError_forFrame(arg0, arg1, arg2);
	} else if (sel == OS.sel_webView_didReceiveTitle_forFrame_) {
		webKit.webView_didReceiveTitle_forFrame(arg0, arg1, arg2);
	} else if (sel == OS.sel_webView_resource_didFinishLoadingFromDataSource_) {
		webKit.webView_resource_didFinishLoadingFromDataSource(arg0, arg1, arg2);
	} else if (sel == OS.sel_webView_identifierForInitialRequest_fromDataSource_) {
		return webKit.webView_identifierForInitialRequest_fromDataSource(arg0, arg1, arg2);
	} else if (sel == OS.sel_webView_contextMenuItemsForElement_defaultMenuItems_) {
		return webKit.webView_contextMenuItemsForElement_defaultMenuItems(arg0, arg1, arg2);
	} else if (sel == OS.sel_webView_mouseDidMoveOverElement_modifierFlags_) {
		webKit.webView_mouseDidMoveOverElement_modifierFlags(arg0, arg1, arg2);
	} else if (sel == OS.sel_webView_unableToImplementPolicyWithError_frame_) {
		webKit.webView_unableToImplementPolicyWithError_frame(arg0, arg1, arg2);
	} else if (sel == OS.sel_webView_runBeforeUnloadConfirmPanelWithMessage_initiatedByFrame_) {
		return webKit.webView_runBeforeUnloadConfirmPanelWithMessage_initiatedByFrame(arg0, arg1, arg2) ? 1 : 0;
	} else if (sel == OS.sel_webView_runJavaScriptAlertPanelWithMessage_initiatedByFrame_) {
		webKit.webView_runJavaScriptAlertPanelWithMessage(arg0, arg1);
	} else if (sel == OS.sel_webView_runJavaScriptConfirmPanelWithMessage_initiatedByFrame_) {
		return webKit.webView_runJavaScriptConfirmPanelWithMessage(arg0, arg1);
	} else if (sel == OS.sel_createPanelDidEnd) {
		webKit.createPanelDidEnd(arg0, arg1, arg2);
	}
	return 0;
}

static long /*int*/ browserProc(long /*int*/ id, long /*int*/ sel, long /*int*/ arg0, long /*int*/ arg1, long /*int*/ arg2, long /*int*/ arg3) {
	Display d = Display.getCurrent();
	if (d == null || d.isDisposed()) return 0;
	Widget widget = d.findWidget(id);
	if (widget == null) return 0;
	WebKit webKit = (WebKit)((Browser)widget).webBrowser;
	if (sel == OS.sel_webView_resource_didFailLoadingWithError_fromDataSource_) {
		webKit.webView_resource_didFailLoadingWithError_fromDataSource(arg0, arg1, arg2, arg3);
	} else if (sel == OS.sel_webView_resource_didReceiveAuthenticationChallenge_fromDataSource_) {
		webKit.webView_resource_didReceiveAuthenticationChallenge_fromDataSource(arg0, arg1, arg2, arg3);
	} else if (sel == OS.sel_callJava) {
		id result = webKit.callJava(arg0, arg1, arg2, arg3);
		return result == null ? 0 : result.id;
	}
	return 0;
}

static long /*int*/ browserProc(long /*int*/ id, long /*int*/ sel, long /*int*/ arg0, long /*int*/ arg1, long /*int*/ arg2, long /*int*/ arg3, long /*int*/ arg4) {
	Display d = Display.getCurrent();
	if (d == null || d.isDisposed()) return 0;
	Widget widget = d.findWidget(id);
	if (widget == null) return 0;
	WebKit webKit = (WebKit)((Browser)widget).webBrowser;
	if (sel == OS.sel_webView_resource_willSendRequest_redirectResponse_fromDataSource_) {
		return webKit.webView_resource_willSendRequest_redirectResponse_fromDataSource(arg0, arg1, arg2, arg3, arg4);
	} else if (sel == OS.sel_webView_decidePolicyForMIMEType_request_frame_decisionListener_) {
		webKit.webView_decidePolicyForMIMEType_request_frame_decisionListener(arg0, arg1, arg2, arg3, arg4);
	} else if (sel == OS.sel_webView_decidePolicyForNavigationAction_request_frame_decisionListener_) {
		webKit.webView_decidePolicyForNavigationAction_request_frame_decisionListener(arg0, arg1, arg2, arg3, arg4);
	} else if (sel == OS.sel_webView_decidePolicyForNewWindowAction_request_newFrameName_decisionListener_) {
		webKit.webView_decidePolicyForNewWindowAction_request_newFrameName_decisionListener(arg0, arg1, arg2, arg3, arg4);
	}
	return 0;
}

static boolean isSelectorExcludedFromWebScript (long /*int*/ aSelector) {
	return !(aSelector == OS.sel_callJava || aSelector == OS.sel_callRunBeforeUnloadConfirmPanelWithMessage);
}

static long /*int*/ webScriptNameForSelector (long /*int*/ aSelector) {
	if (aSelector == OS.sel_callJava) {
		return NSString.stringWith ("callJava").id; //$NON-NLS-1$
	}
	if (aSelector == OS.sel_callRunBeforeUnloadConfirmPanelWithMessage) {
		return NSString.stringWith ("callRunBeforeUnloadConfirmPanelWithMessage").id; //$NON-NLS-1$
	}
	return 0;
}

@Override
public boolean close () {
	return close (true);
}

boolean close (boolean showPrompters) {
	if (!jsEnabled) return true;

	String functionName = EXECUTE_ID + "CLOSE"; // $NON-NLS-1$
	StringBuffer buffer = new StringBuffer ("function "); // $NON-NLS-1$
	buffer.append (functionName);
	buffer.append ("(win) {\n"); // $NON-NLS-1$
	buffer.append ("var fn = win.onbeforeunload; if (fn != null) {try {var str = fn(); "); // $NON-NLS-1$
	if (showPrompters) {
		buffer.append ("if (str != null) { "); // $NON-NLS-1$
		buffer.append ("var result = window.external.callRunBeforeUnloadConfirmPanelWithMessage(str);"); // $NON-NLS-1$
		buffer.append ("if (!result) return false;}"); // $NON-NLS-1$
	}
	buffer.append ("} catch (e) {}}"); // $NON-NLS-1$
	buffer.append ("try {for (var i = 0; i < win.frames.length; i++) {var result = "); // $NON-NLS-1$
	buffer.append (functionName);
	buffer.append ("(win.frames[i]); if (!result) return false;}} catch (e) {} return true;"); // $NON-NLS-1$
	buffer.append ("\n};"); // $NON-NLS-1$
	execute (buffer.toString ());

	Boolean result = (Boolean)evaluate ("return " + functionName +"(window);"); // $NON-NLS-1$ // $NON-NLS-2$
	if (result == null) return false;
	return result.booleanValue ();
}

@Override
public boolean execute (String script) {
	WebFrame frame = webView.mainFrame();
	long /*int*/ context = frame.globalContext();

	byte[] bytes = (script + '\0').getBytes(StandardCharsets.UTF_8); //$NON-NLS-1$
	long /*int*/ scriptString = OS.JSStringCreateWithUTF8CString(bytes);

	bytes = (getUrl() + '\0').getBytes(StandardCharsets.UTF_8); //$NON-NLS-1$
	long /*int*/ urlString = OS.JSStringCreateWithUTF8CString(bytes);

	long /*int*/ result = OS.JSEvaluateScript(context, scriptString, 0, urlString, 0, null);
	OS.JSStringRelease(urlString);
	OS.JSStringRelease(scriptString);
	return result != 0;
}

@Override
public boolean forward () {
	html = null;
	return webView.goForward();
}

@Override
public String getBrowserType () {
	return "webkit"; //$NON-NLS-1$
}

@Override
public String getText() {
	WebFrame mainFrame = webView.mainFrame();
	WebDataSource dataSource = mainFrame.dataSource();
	if (dataSource == null) return "";	//$NON-NLS-1$
	WebDocumentRepresentation representation = dataSource.representation();
	if (representation == null) return "";	//$NON-NLS-1$
	NSString source = representation.documentSource();
	if (source == null) return "";	//$NON-NLS-1$
	return source.getString();
}

@Override
public String getUrl() {
	/* WebKit auto-navigates to about:blank at startup */
	if (url.length() == 0) return ABOUT_BLANK;

	return url;
}

@Override
public boolean isBackEnabled() {
	return webView.canGoBack();
}

@Override
public boolean isForwardEnabled() {
	return webView.canGoForward();
}

@Override
public void refresh() {
	html = null;
	webView.reload(null);
}

@Override
public boolean setText(String html, boolean trusted) {
	/*
	* If this.html is not null then the about:blank page is already being loaded,
	* so no navigate is required.  Just set the html that is to be shown.
	*/
	boolean blankLoading = this.html != null;
	this.html = html;
	untrustedText = !trusted;
	if (blankLoading) return true;

	NSURL inURL = NSURL.URLWithString(NSString.stringWith (ABOUT_BLANK));
	NSURLRequest request = NSURLRequest.requestWithURL(inURL);
	WebFrame mainFrame = webView.mainFrame();
	mainFrame.loadRequest(request);
	return true;
}

@Override
public boolean setUrl(String url, String postData, String[] headers) {
	html = null;
	lastNavigateURL = url;

	if (url.indexOf('/') == 0) {
		url = PROTOCOL_FILE + url;
	} else if (url.indexOf(':') == -1) {
		url = PROTOCOL_HTTP + url;
	}

	NSString str = NSString.stringWith(url);
	NSString unescapedStr = NSString.stringWith("%#"); //$NON-NLS-1$
	long /*int*/ ptr = OS.CFURLCreateStringByAddingPercentEscapes(0, str.id, unescapedStr.id, 0, OS.kCFStringEncodingUTF8);
	NSString escapedString = new NSString(ptr);
	NSURL inURL = NSURL.URLWithString(escapedString);
	OS.CFRelease(ptr);
	NSMutableURLRequest request = (NSMutableURLRequest)NSMutableURLRequest.requestWithURL(inURL);
	if (postData != null) {
		request.setHTTPMethod(NSString.stringWith(POST));
		byte[] bytes = postData.getBytes();
		NSData data = NSData.dataWithBytes(bytes, bytes.length);
		request.setHTTPBody(data);
	}
	if (headers != null) {
		for (int i = 0; i < headers.length; i++) {
			String current = headers[i];
			if (current != null) {
				int index = current.indexOf(':');
				if (index != -1) {
					String key = current.substring(0, index).trim();
					String value = current.substring(index + 1).trim();
					if (key.length() > 0 && value.length() > 0) {
						if (key.equalsIgnoreCase(USER_AGENT)) {
							/*
							* Feature of WebKit.  The user-agent header value cannot be overridden
							* here.  The workaround is to temporarily set the value on the WebView
							* and then remove it after the loading of the request has begun.
							*/
							webView.setCustomUserAgent(NSString.stringWith(value));
						} else {
							request.setValue(NSString.stringWith(value), NSString.stringWith(key));
						}
					}
				}
			}
		}
	}
	WebFrame mainFrame = webView.mainFrame();
	mainFrame.loadRequest(request);
	webView.setCustomUserAgent(null);
	return true;
}

@Override
public void stop() {
	html = null;
	webView.stopLoading(null);
}

@Override
boolean translateMnemonics() {
	return false;
}

/* WebFrameLoadDelegate */

void webView_didChangeLocationWithinPageForFrame(long /*int*/ sender, long /*int*/ frameID) {
	WebFrame frame = new WebFrame(frameID);
	WebDataSource dataSource = frame.dataSource();
	NSURLRequest request = dataSource.request();
	NSURL url = request.URL();
	NSString s = url.absoluteString();
	int length = (int)/*64*/s.length();
	if (length == 0) return;
	String url2 = s.getString();
	/*
	 * If the URI indicates that the page is being rendered from memory
	 * (via setText()) then set it to about:blank to be consistent with IE.
	 */
	if (url2.equals (URI_FILEROOT)) {
		url2 = ABOUT_BLANK;
	} else {
		length = URI_FILEROOT.length ();
		if (url2.startsWith (URI_FILEROOT) && url2.charAt (length) == '#') {
			url2 = ABOUT_BLANK + url2.substring (length);
		}
	}

	final Display display = browser.getDisplay();
	boolean top = frameID == webView.mainFrame().id;
	if (top) {
		StatusTextEvent statusText = new StatusTextEvent(browser);
		statusText.display = display;
		statusText.widget = browser;
		statusText.text = url2;
		for (int i = 0; i < statusTextListeners.length; i++) {
			statusTextListeners[i].changed(statusText);
		}
	}

	LocationEvent location = new LocationEvent(browser);
	location.display = display;
	location.widget = browser;
	location.location = url2;
	location.top = top;
	for (int i = 0; i < locationListeners.length; i++) {
		locationListeners[i].changed(location);
	}
}

void webView_didFailProvisionalLoadWithError_forFrame(long /*int*/ sender, long /*int*/ error, long /*int*/ frame) {
	if (frame == webView.mainFrame().id) {
		/*
		* Feature on WebKit.  The identifier is used here as a marker for the events
		* related to the top frame and the URL changes related to that top frame as
		* they should appear on the location bar of a browser.  It is expected to reset
		* the identifier to 0 when the event didFinishLoadingFromDataSource related to
		* the identifierForInitialRequest event is received.  However, WebKit fires
		* the didFinishLoadingFromDataSource event before the entire content of the
		* top frame is loaded.  It is possible to receive multiple willSendRequest
		* events in this interval, causing the Browser widget to send unwanted
		* Location.changing events.  For this reason, the identifier is reset to 0
		* when the top frame has either finished loading (didFinishLoadForFrame
		* event) or failed (didFailProvisionalLoadWithError).
		*/
		identifier = 0;
	}

	NSError nserror = new NSError(error);
	long /*int*/ errorCode = nserror.code();
	if (OS.NSURLErrorBadURL < errorCode) return;

	NSURL failingURL = null;
	NSDictionary info = nserror.userInfo();
	if (info != null) {
		id id = info.valueForKey(NSString.stringWith("NSErrorFailingURLKey")); //$NON-NLS-1$
		if (id != null) failingURL = new NSURL(id);
	}

	if (failingURL != null && OS.NSURLErrorServerCertificateNotYetValid <= errorCode && errorCode <= OS.NSURLErrorSecureConnectionFailed) {
		/* handle invalid certificate error */
		id certificates = info.objectForKey(NSString.stringWith("NSErrorPeerCertificateChainKey")); //$NON-NLS-1$

		long /*int*/[] policySearch = new long /*int*/[1];
		long /*int*/[] policyRef = new long /*int*/[1];
		long /*int*/[] trustRef = new long /*int*/[1];
		boolean success = false;
		int result = OS.SecPolicySearchCreate(OS.CSSM_CERT_X_509v3, 0, 0, policySearch);
		if (result == 0 && policySearch[0] != 0) {
			result = OS.SecPolicySearchCopyNext(policySearch[0], policyRef);
			if (result == 0 && policyRef[0] != 0) {
				result = OS.SecTrustCreateWithCertificates(certificates.id, policyRef[0], trustRef);
				if (result == 0 && trustRef[0] != 0) {
					SFCertificateTrustPanel panel = SFCertificateTrustPanel.sharedCertificateTrustPanel();
					String failingUrlString = failingURL.absoluteString().getString();
					String message = Compatibility.getMessage("SWT_InvalidCert_Message", new Object[] {failingUrlString}); //$NON-NLS-1$
					panel.setAlternateButtonTitle(NSString.stringWith(Compatibility.getMessage("SWT_Cancel"))); //$NON-NLS-1$
					panel.setShowsHelp(true);
					failingURL.retain();
					NSWindow window = browser.getShell().view.window();
					panel.beginSheetForWindow(window, delegate, OS.sel_createPanelDidEnd, failingURL.id, trustRef[0], NSString.stringWith(message));
					success = true;
				}
			}
		}

		if (trustRef[0] != 0) OS.CFRelease(trustRef[0]);
		if (policyRef[0] != 0) OS.CFRelease(policyRef[0]);
		if (policySearch[0] != 0) OS.CFRelease(policySearch[0]);
		if (success) return;
	}

	/* handle other types of errors */
	NSString description = nserror.localizedDescription();
	if (description != null) {
		String descriptionString = description.getString();
		String message = failingURL != null ? failingURL.absoluteString().getString() + "\n\n" : ""; //$NON-NLS-1$ //$NON-NLS-2$
		message += Compatibility.getMessage ("SWT_Page_Load_Failed", new Object[] {descriptionString}); //$NON-NLS-1$
		MessageBox messageBox = new MessageBox(browser.getShell(), SWT.OK | SWT.ICON_ERROR);
		messageBox.setMessage(message);
		messageBox.open();
	}
}

void createPanelDidEnd(long /*int*/ sheet, long /*int*/ returnCode, long /*int*/ contextInfo) {
	NSURL failingURL = new NSURL(contextInfo);
	failingURL.autorelease();
	if (returnCode != OS.NSFileHandlingPanelOKButton) return;	/* nothing more to do */

	long /*int*/ method = OS.class_getClassMethod(OS.class_NSURLRequest, OS.sel_setAllowsAnyHTTPSCertificate);
	if (method != 0) {
		OS.objc_msgSend(OS.class_NSURLRequest, OS.sel_setAllowsAnyHTTPSCertificate, 1, failingURL.host().id);
		setUrl(failingURL.absoluteString().getString(), null, null);
	}
}

void webView_didFinishLoadForFrame(long /*int*/ sender, long /*int*/ frameID) {
	if (frameID == webView.mainFrame().id) {
		/*
		 * If html is not null then there is html from a previous setText() call
		 * waiting to be set into the about:blank page once it has completed loading.
		 */
		if (html != null) {
			if (getUrl().startsWith(ABOUT_BLANK)) {
				loadingText = true;
				NSString string = NSString.stringWith(html);
				NSString URLString;
				if (untrustedText) {
					URLString = NSString.stringWith(ABOUT_BLANK);
				} else {
					URLString = NSString.stringWith(URI_FILEROOT);
				}
				NSURL URL = NSURL.URLWithString(URLString);
				WebFrame mainFrame = webView.mainFrame();
				mainFrame.loadHTMLString(string, URL);
				html = null;
			}
		}

		/*
		* The loadHTMLString() invocation above will trigger a second webView_didFinishLoadForFrame
		* callback when it is completed.  If text was just set into the browser then wait for this
		* second callback to come before sending the title or completed events.
		*/
		if (!loadingText) {
			/*
			* To be consistent with other platforms a title event should be fired when a
			* page has completed loading.  A page with a