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

Go to download
Show more of this group Show more artifacts with this name
Show all versions of org.eclipse.swt.win32.win32.x86 Show documentation
SWT is an open source widget toolkit for Java designed to provide efficient, portable access to the user-interface facilities of the operating systems on which it is implemented.
The newest version!
/*******************************************************************************
 * Copyright (c) 2010, 2012 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.internal.*;
import org.eclipse.swt.internal.ole.win32.*;
import org.eclipse.swt.internal.webkit.*;
import org.eclipse.swt.internal.win32.*;
import org.eclipse.swt.widgets.*;

class WebPolicyDelegate {
	COMObject iWebPolicyDelegate;
	int refCount = 0;

	Browser browser;

WebPolicyDelegate (Browser browser) {
	createCOMInterfaces ();
	this.browser = browser;
}

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

void createCOMInterfaces () {
	iWebPolicyDelegate = new COMObject (new int[] {2, 0, 0, 5, 5, 5, 3}) {
		public int /*long*/ method0 (int /*long*/[] args) {return QueryInterface (args[0], args[1]);}
		public int /*long*/ method1 (int /*long*/[] args) {return AddRef ();}
		public int /*long*/ method2 (int /*long*/[] args) {return Release ();}
		public int /*long*/ method3 (int /*long*/[] args) {return decidePolicyForNavigationAction (args[0], args[1], args[2], args[3], args[4]);}
		public int /*long*/ method4 (int /*long*/[] args) {return decidePolicyForNewWindowAction (args[0], args[1], args[2], args[3], args[4]);}
		public int /*long*/ method5 (int /*long*/[] args) {return decidePolicyForMIMEType (args[0], args[1], args[2], args[3], args[4]);}
		public int /*long*/ method6 (int /*long*/[] args) {return unableToImplementPolicyWithError (args[0], args[1], args[2]);}
	};
}

int decidePolicyForMIMEType (int /*long*/ webView, int /*long*/ type, int /*long*/ request, int /*long*/ frame, int /*long*/ listener) {
	IWebView iwebView = new IWebView (webView);
	int[] canShow = new int[1];
	iwebView.canShowMIMEType (type, canShow);
	IWebPolicyDecisionListener pdListener = new IWebPolicyDecisionListener (listener);
	if (canShow[0] != 0) {
		pdListener.use ();
	} else {
		pdListener.download ();
	}
	return COM.S_OK;
}

int decidePolicyForNavigationAction (int /*long*/ webView, int /*long*/ actionInformation, int /*long*/ request, int /*long*/ frame, int /*long*/ listener) {
	IWebURLRequest iwebUrlRequest = new IWebURLRequest (request);
	int /*long*/[] result = new int /*long*/[1];
	int hr = iwebUrlRequest.URL (result);
	if (hr != COM.S_OK || result[0] == 0) {
		return COM.S_OK;
	}
	String url = WebKit.extractBSTR (result[0]);
	COM.SysFreeString (result[0]);
	IWebPolicyDecisionListener pdListener = new IWebPolicyDecisionListener (listener);
	WebKit webKit = (WebKit)browser.webBrowser;
	if (webKit.loadingText) {
		/* 
		 * WebKit is auto-navigating to about:blank in response to a loadHTMLString()
		 * invocation.  This navigate should always proceed without sending an event
		 * since it is preceded by an explicit navigate to about:blank in setText().
		 */
		pdListener.use ();
		return COM.S_OK;
	}
	if (url.length () == 0) {
		pdListener.ignore ();
		return COM.S_OK;
	}
	if (url.startsWith (WebKit.PROTOCOL_FILE) && webKit.getUrl ().startsWith (WebKit.ABOUT_BLANK) && webKit.untrustedText) {
		/* indicates an attempt to access the local file system from untrusted content */
		pdListener.ignore ();
		return COM.S_OK;
	}
	/*
	 * 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 (url.equals (WebKit.URI_FILEROOT)) {
		url = WebKit.ABOUT_BLANK;
	} else {
		int length = WebKit.URI_FILEROOT.length ();
		if (url.startsWith (WebKit.URI_FILEROOT) && url.charAt (length) == '#') {
			url = WebKit.ABOUT_BLANK + url.substring (length);
		}
	}
	LocationEvent newEvent = new LocationEvent (browser);
	newEvent.display = browser.getDisplay ();
	newEvent.widget = browser;
	newEvent.location = url;
	newEvent.doit = true;
	LocationListener[] locationListeners = webKit.locationListeners;
	if (locationListeners != null) {
		for (int i = 0; i < locationListeners.length; i++) {
			locationListeners[i].changing (newEvent);
		}
	}
	if (newEvent.doit) {
		if (webKit.jsEnabled != webKit.jsEnabledOnNextPage) {
			webKit.jsEnabled = webKit.jsEnabledOnNextPage;
			IWebView view = new IWebView (webView);
			result[0] = 0;
			hr = view.preferences (result);
			if (hr == COM.S_OK && result[0] != 0) {
				IWebPreferences preferences = new IWebPreferences (result[0]);
				hr = preferences.setJavaScriptEnabled (webKit.jsEnabled ? 1 : 0);
				view.setPreferences (preferences.getAddress());
				preferences.Release ();
			}
		}
		pdListener.use ();
		webKit.lastNavigateURL = url;
	} else {
		pdListener.ignore ();
	}
	return COM.S_OK;
}

int decidePolicyForNewWindowAction (int /*long*/ webView, int /*long*/ actionInformation, int /*long*/ request, int /*long*/ frameName, int /*long*/ listener) {
	IWebPolicyDecisionListener pdListener = new IWebPolicyDecisionListener (listener);
	pdListener.use();
	return COM.S_OK;
}

protected void disposeCOMInterfaces () {
	if (iWebPolicyDelegate != null) {
		iWebPolicyDelegate.dispose ();
		iWebPolicyDelegate = null;
	}	
}

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

int QueryInterface (int /*long*/ riid, int /*long*/ ppvObject) {
	if (riid == 0 || ppvObject == 0) return COM.E_INVALIDARG;
	GUID guid = new GUID ();
	COM.MoveMemory (guid, riid, GUID.sizeof);

	if (COM.IsEqualGUID (guid, COM.IIDIUnknown)) {
		COM.MoveMemory (ppvObject, new int /*long*/[] {iWebPolicyDelegate.getAddress ()}, OS.PTR_SIZEOF);
		new IUnknown (iWebPolicyDelegate.getAddress ()).AddRef ();
		return COM.S_OK;
	}
	if (COM.IsEqualGUID (guid, WebKit_win32.IID_IWebPolicyDelegate)) {
		COM.MoveMemory (ppvObject, new int /*long*/[] {iWebPolicyDelegate.getAddress ()}, OS.PTR_SIZEOF);
		new IUnknown (iWebPolicyDelegate.getAddress ()).AddRef ();
		return COM.S_OK;
	}

	COM.MoveMemory (ppvObject, new int /*long*/[] {0}, OS.PTR_SIZEOF);
	return COM.E_NOINTERFACE;
}

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

int unableToImplementPolicyWithError (int /*long*/ webView, int /*long*/ error, int /*long*/ frame) {
	if (browser.isDisposed ()) return COM.S_OK;

	IWebError iweberror = new IWebError (error);
	String failingURL = null;
	int /*long*/[] result = new int /*long*/[1];
	int hr = iweberror.failingURL (result);
	if (hr == COM.S_OK && result[0] != 0) {
		failingURL = WebKit.extractBSTR (result[0]);
		COM.SysFreeString (result[0]);
	}
	result[0] = 0;
	hr = iweberror.localizedDescription (result);
	if (hr != COM.S_OK || result[0] == 0) {
    	return COM.S_OK;
    }
	String description = WebKit.extractBSTR (result[0]);
	COM.SysFreeString (result[0]);

	String message = failingURL != null ? failingURL + "\n\n" : ""; //$NON-NLS-1$ //$NON-NLS-2$
	message += Compatibility.getMessage ("SWT_Page_Load_Failed", new Object[] {description}); //$NON-NLS-1$
	MessageBox messageBox = new MessageBox (browser.getShell (), SWT.OK | SWT.ICON_ERROR);
	messageBox.setMessage (message);
	messageBox.open ();
	return COM.S_OK;
}

}