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The osx x86_64 swt jar as available in the Eclipse 4.6 (Neon) release for OSX. It is suitable for use with jface and other dependencies available from maven central in the org.eclipse.scout.sdk.deps group. The sources is copied from swt-4.6-cocoa-macosx-x86_64.zip from http://download.eclipse.org/eclipse/downloads/drops4/R-4.6-201606061100/ and javadoc is generated from sources.
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/*******************************************************************************
 * Copyright (c) 2003, 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 org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.mozilla.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

class WindowCreator2 {
	XPCOMObject supports;
	XPCOMObject windowCreator;
	XPCOMObject windowCreator2;
	int refCount = 0;

WindowCreator2 () {
	createCOMInterfaces ();
}

int AddRef () {
	refCount++;
	return refCount;
}

void createCOMInterfaces () {
	/* Create each of the interfaces that this object implements */
	supports = new XPCOMObject (new int[] {2, 0, 0}) {
		@Override
		public long /*int*/ method0 (long /*int*/[] args) {return QueryInterface (args[0], args[1]);}
		@Override
		public long /*int*/ method1 (long /*int*/[] args) {return AddRef ();}
		@Override
		public long /*int*/ method2 (long /*int*/[] args) {return Release ();}
	};

	windowCreator = new XPCOMObject (new int[] {2, 0, 0, 3}) {
		@Override
		public long /*int*/ method0 (long /*int*/[] args) {return QueryInterface (args[0], args[1]);}
		@Override
		public long /*int*/ method1 (long /*int*/[] args) {return AddRef ();}
		@Override
		public long /*int*/ method2 (long /*int*/[] args) {return Release ();}
		@Override
		public long /*int*/ method3 (long /*int*/[] args) {return CreateChromeWindow (args[0], (int)/*64*/args[1], args[2]);}
	};

	windowCreator2 = new XPCOMObject (new int[] {2, 0, 0, 3, 6}) {
		@Override
		public long /*int*/ method0 (long /*int*/[] args) {return QueryInterface (args[0], args[1]);}
		@Override
		public long /*int*/ method1 (long /*int*/[] args) {return AddRef ();}
		@Override
		public long /*int*/ method2 (long /*int*/[] args) {return Release ();}
		@Override
		public long /*int*/ method3 (long /*int*/[] args) {return CreateChromeWindow (args[0], (int)/*64*/args[1], args[2]);}
		@Override
		public long /*int*/ method4 (long /*int*/[] args) {return CreateChromeWindow2 (args[0], (int)/*64*/args[1], (int)/*64*/args[2], args[3], args[4], args[5]);}
	};
}

void disposeCOMInterfaces () {
	if (supports != null) {
		supports.dispose ();
		supports = null;
	}
	if (windowCreator != null) {
		windowCreator.dispose ();
		windowCreator = null;
	}

	if (windowCreator2 != null) {
		windowCreator2.dispose ();
		windowCreator2 = null;
	}
}

long /*int*/ getAddress () {
	return windowCreator.getAddress ();
}

int QueryInterface (long /*int*/ riid, long /*int*/ ppvObject) {
	if (riid == 0 || ppvObject == 0) return XPCOM.NS_ERROR_NO_INTERFACE;
	nsID guid = new nsID ();
	XPCOM.memmove (guid, riid, nsID.sizeof);

	if (guid.Equals (XPCOM.NS_ISUPPORTS_IID)) {
		XPCOM.memmove (ppvObject, new long /*int*/[] {supports.getAddress ()}, C.PTR_SIZEOF);
		AddRef ();
		return XPCOM.NS_OK;
	}
	if (guid.Equals (XPCOM.NS_IWINDOWCREATOR_IID)) {
		XPCOM.memmove (ppvObject, new long /*int*/[] {windowCreator.getAddress ()}, C.PTR_SIZEOF);
		AddRef ();
		return XPCOM.NS_OK;
	}
	if (guid.Equals (XPCOM.NS_IWINDOWCREATOR2_IID)) {
		XPCOM.memmove (ppvObject, new long /*int*/[] {windowCreator2.getAddress ()}, C.PTR_SIZEOF);
		AddRef ();
		return XPCOM.NS_OK;
	}

	XPCOM.memmove (ppvObject, new long /*int*/[] {0}, C.PTR_SIZEOF);
	return XPCOM.NS_ERROR_NO_INTERFACE;
}

int Release () {
	refCount--;
	if (refCount == 0) disposeCOMInterfaces ();
	return refCount;
}

/* nsIWindowCreator */

int CreateChromeWindow (long /*int*/ parent, int chromeFlags, long /*int*/ _retval) {
	return CreateChromeWindow2 (parent, chromeFlags, 0, 0, 0, _retval);
}

/* nsIWindowCreator2 */

int CreateChromeWindow2 (long /*int*/ parent, int chromeFlags, int contextFlags, long /*int*/ uri, long /*int*/ cancel, long /*int*/ _retval) {
	if (parent == 0 && (chromeFlags & nsIWebBrowserChrome.CHROME_OPENAS_CHROME) == 0) {
		return XPCOM.NS_ERROR_NOT_IMPLEMENTED;
	}
	Browser src = null;
	if (parent != 0) {
		nsIWebBrowserChrome browserChromeParent = new nsIWebBrowserChrome (parent);
		long /*int*/[] aWebBrowser = new long /*int*/[1];
		int rc = browserChromeParent.GetWebBrowser (aWebBrowser);
		if (rc != XPCOM.NS_OK) Mozilla.error (rc);
		if (aWebBrowser[0] == 0) Mozilla.error (XPCOM.NS_ERROR_NO_INTERFACE);

		nsIWebBrowser webBrowser = new nsIWebBrowser (aWebBrowser[0]);
		long /*int*/[] result = new long /*int*/[1];
		rc = webBrowser.QueryInterface (IIDStore.GetIID (nsIBaseWindow.class), result);
		if (rc != XPCOM.NS_OK) {
			SWT.error (rc);
		}
		if (result[0] == 0) Mozilla.error (XPCOM.NS_ERROR_NO_INTERFACE);
		webBrowser.Release ();

		nsIBaseWindow baseWindow = new nsIBaseWindow (result[0]);
		result[0] = 0;
		long /*int*/[] aParentNativeWindow = new long /*int*/[1];
		rc = baseWindow.GetParentNativeWindow (aParentNativeWindow);
		if (rc != XPCOM.NS_OK) Mozilla.error (rc);
		if (aParentNativeWindow[0] == 0) Mozilla.error (XPCOM.NS_ERROR_NO_INTERFACE);
		baseWindow.Release ();

		src = Mozilla.findBrowser (aParentNativeWindow[0]);
	}
	final Browser browser;
	boolean doit = true;
	if ((chromeFlags & nsIWebBrowserChrome.CHROME_OPENAS_CHROME) != 0) {
		/*
		* Mozilla will request a new Browser in a modal window in order to emulate a native
		* dialog that is not available to it (eg.- a print dialog on Linux).  For this
		* reason modal requests are handled here so that the user is not exposed to them.
		*/
		int style = SWT.NONE;
		if ((chromeFlags & nsIWebBrowserChrome.CHROME_WINDOW_POPUP) == 0) {
			/* add dialog trim for all windows except pop-ups */
			style |= SWT.DIALOG_TRIM;
		}
		if ((chromeFlags & nsIWebBrowserChrome.CHROME_MODAL) != 0) style |= SWT.APPLICATION_MODAL;
		final Shell shell = src == null ?
			new Shell (style) :
			new Shell (src.getShell(), style);
		shell.setLayout (new FillLayout ());
		browser = new Browser (shell, src == null ? SWT.MOZILLA : src.getStyle () & SWT.MOZILLA);
		browser.addVisibilityWindowListener (new VisibilityWindowListener () {
			@Override
			public void hide (WindowEvent event) {
			}
			@Override
			public void show (WindowEvent event) {
				if (event.location != null) shell.setLocation (event.location);
				if (event.size != null) {
					Point size = event.size;
					shell.setSize (shell.computeSize (size.x, size.y));
				}
				shell.open ();
			}
		});
		browser.addCloseWindowListener (new CloseWindowListener () {
			@Override
			public void close (WindowEvent event) {
				shell.close ();
			}
		});
		if (uri != 0) {
			nsIURI location = new nsIURI (uri);
			long /*int*/ aSpec = XPCOM.nsEmbedCString_new ();
			if (location.GetSpec (aSpec) == XPCOM.NS_OK) {
				int length = XPCOM.nsEmbedCString_Length (aSpec);
				if (length > 0) {
					long /*int*/ buffer = XPCOM.nsEmbedCString_get (aSpec);
					byte[] dest = new byte[length];
					XPCOM.memmove (dest, buffer, length);
					browser.setUrl (new String (dest));
				}
			}
			XPCOM.nsEmbedCString_delete (aSpec);
		}
	} else {
		WindowEvent event = new WindowEvent (src);
		event.display = src.getDisplay ();
		event.widget = src;
		event.required = true;
		for (int i = 0; i < src.webBrowser.openWindowListeners.length; i++) {
			src.webBrowser.openWindowListeners[i].open (event);
		}
		browser = event.browser;

		/* Ensure that the Browser provided by the client is valid for use */
		doit = browser != null && !browser.isDisposed ();
		if (doit) {
			String platform = Platform.PLATFORM;
			boolean isMozillaNativePlatform = platform.equals ("gtk"); //$NON-NLS-1$
			doit = isMozillaNativePlatform || (browser.getStyle () & SWT.MOZILLA) != 0;
		}
	}
	if (doit) {
		Mozilla mozilla = (Mozilla)browser.webBrowser;
		mozilla.isChild = true;
		long /*int*/ chromePtr = mozilla.webBrowserChrome.getAddress ();
		nsIWebBrowserChrome webBrowserChrome = new nsIWebBrowserChrome (chromePtr);
		webBrowserChrome.SetChromeFlags (chromeFlags);
		webBrowserChrome.AddRef ();
		XPCOM.memmove (_retval, new long /*int*/[] {chromePtr}, C.PTR_SIZEOF);
	} else {
		if (cancel != 0) {
			XPCOM.memmove (cancel, new boolean[] {true});
		}
	}
	return doit ? XPCOM.NS_OK : XPCOM.NS_ERROR_NOT_IMPLEMENTED;
}
}