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• WebFrameLoadDelegate.java

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

/*******************************************************************************
 * 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 java.io.*;
import java.net.*;
import java.util.*;

import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
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.layout.*;
import org.eclipse.swt.widgets.*;

class WebFrameLoadDelegate {
	COMObject iWebFrameLoadDelegate;
	int refCount = 0;

	Browser browser;
	String html;
	String url;

	static final String OBJECTNAME_EXTERNAL = "external"; //$NON-NLS-1$

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

void addEventHandlers (boolean top) {
	if (top) {
		StringBuffer buffer = new StringBuffer ("window.SWTkeyhandler = function SWTkeyhandler(e) {"); //$NON-NLS-1$
		buffer.append ("try {e.returnValue = HandleWebKitEvent(e.type, e.keyCode, e.charCode, e.altKey, e.ctrlKey, e.shiftKey, e.metaKey);} catch (e) {}};"); //$NON-NLS-1$
		buffer.append ("document.addEventListener('keydown', SWTkeyhandler, true);"); //$NON-NLS-1$
		buffer.append ("document.addEventListener('keypress', SWTkeyhandler, true);"); //$NON-NLS-1$
		buffer.append ("document.addEventListener('keyup', SWTkeyhandler, true);"); //$NON-NLS-1$
		browser.execute (buffer.toString ());

		buffer = new StringBuffer ("window.SWTmousehandler = function SWTmousehandler(e) {"); //$NON-NLS-1$
		buffer.append ("try {e.returnValue = HandleWebKitEvent(e.type, e.screenX, e.screenY, e.detail, e.button + 1, e.altKey, e.ctrlKey, e.shiftKey, e.metaKey, e.relatedTarget != null);} catch (e) {}};"); //$NON-NLS-1$
		buffer.append ("document.addEventListener('mousedown', SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("document.addEventListener('mouseup', SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("document.addEventListener('mousemove', SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("document.addEventListener('mousewheel', SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("document.addEventListener('dragstart', SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("document.addEventListener('mouseover', SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("document.addEventListener('mouseout', SWTmousehandler, true);"); //$NON-NLS-1$

		browser.execute (buffer.toString ());
	} else {
		StringBuffer buffer = new StringBuffer ("for (var i = 0; i < frames.length; i++) {"); //$NON-NLS-1$
		buffer.append ("frames[i].document.addEventListener('keydown', window.SWTkeyhandler, true);"); //$NON-NLS-1$
		buffer.append ("frames[i].document.addEventListener('keypress', window.SWTkeyhandler, true);"); //$NON-NLS-1$
		buffer.append ("frames[i].document.addEventListener('keyup', window.SWTkeyhandler, true);"); //$NON-NLS-1$
		buffer.append ("frames[i].document.addEventListener('mousedown', window.SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("frames[i].document.addEventListener('mouseup', window.SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("frames[i].document.addEventListener('mousemove', window.SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("frames[i].document.addEventListener('mouseover', window.SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("frames[i].document.addEventListener('mouseout', window.SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("frames[i].document.addEventListener('mousewheel', window.SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ("frames[i].document.addEventListener('dragstart', window.SWTmousehandler, true);"); //$NON-NLS-1$
		buffer.append ('}');
		browser.execute (buffer.toString ());
	}
}

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

void createCOMInterfaces () {
	iWebFrameLoadDelegate = new COMObject (new int[] {2, 0, 0, 2, 2, 3, 2, 3, 3, 2, 3, 2, 5, 2, 2, 3, 4}) {
		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 didStartProvisionalLoadForFrame (args[0], args[1]);}
		public int /*long*/ method4 (int /*long*/[] args) {return COM.E_NOTIMPL;}
		public int /*long*/ method5 (int /*long*/[] args) {return didFailProvisionalLoadWithError (args[0], args[1], args[2]);}
		public int /*long*/ method6 (int /*long*/[] args) {return didCommitLoadForFrame (args[0], args[1]);}
		public int /*long*/ method7 (int /*long*/[] args) {return didReceiveTitle (args[0], args[1], args[2]);}
		public int /*long*/ method8 (int /*long*/[] args) {return COM.E_NOTIMPL;}
		public int /*long*/ method9 (int /*long*/[] args) {return didFinishLoadForFrame (args[0], args[1]);}
		public int /*long*/ method10 (int /*long*/[] args){return COM.E_NOTIMPL;}
		public int /*long*/ method11 (int /*long*/[] args){return didChangeLocationWithinPageForFrame (args[0], args[1]);}
		public int /*long*/ method12 (int /*long*/[] args){return COM.S_OK;}
		public int /*long*/ method13 (int /*long*/[] args){return COM.E_NOTIMPL;}
		public int /*long*/ method14 (int /*long*/[] args){return COM.S_OK;}
		public int /*long*/ method15 (int /*long*/[] args){return COM.S_OK;}
		public int /*long*/ method16 (int /*long*/[] args){return didClearWindowObject (args[0], args[1], args[2], args[3]);}
	};

	/* Callbacks that take double parameters require custom callbacks that instead pass pointers to the doubles. */
	int /*long*/ ppVtable = iWebFrameLoadDelegate.ppVtable;
	int /*long*/[] pVtable = new int /*long*/[1];
	COM.MoveMemory (pVtable, ppVtable, OS.PTR_SIZEOF);
	int /*long*/[] funcs = new int /*long*/[17];
	COM.MoveMemory (funcs, pVtable[0], OS.PTR_SIZEOF * funcs.length);
	funcs[12] = WebKit_win32.willPerformClientRedirectToURL_CALLBACK (funcs[12]);
	COM.MoveMemory (pVtable[0], funcs, OS.PTR_SIZEOF * funcs.length);
}

int didChangeLocationWithinPageForFrame (int /*long*/ webView, int /*long*/ frame) {
	IWebFrame iwebframe = new IWebFrame (frame);
	int /*long*/[] result = new int /*long*/[1];
	int hr = iwebframe.dataSource (result);
	if (hr != COM.S_OK || result[0] == 0) {
		return COM.S_OK;
	}
	IWebDataSource dataSource = new IWebDataSource (result[0]);
	result[0] = 0;
	hr = dataSource.request (result);
	dataSource.Release ();
	if (hr != COM.S_OK || result[0] == 0) {
		return COM.S_OK;
	}
	IWebURLRequest request = new IWebURLRequest (result[0]);
	result[0] = 0;
	hr = request.URL (result);
	request.Release ();
	if (hr != COM.S_OK || result[0] == 0) {
		return COM.S_OK;
	}
	String url2 = WebKit.extractBSTR (result[0]);
	COM.SysFreeString (result[0]);
	if (url2.length() == 0) 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 (url2.equals (WebKit.URI_FILEROOT)) {
		url2 = WebKit.ABOUT_BLANK;
	} else {
		int length = WebKit.URI_FILEROOT.length ();
		if (url2.startsWith (WebKit.URI_FILEROOT) && url2.charAt (length) == '#') {
			url2 = WebKit.ABOUT_BLANK + url2.substring (length);
		}
	}
	final Display display = browser.getDisplay ();
	result[0] = 0;
	IWebView iWebView = new IWebView (webView);
	hr = iWebView.mainFrame (result);
	boolean top = false;
	if (hr == COM.S_OK && result[0] != 0) {
		top = frame == result[0];
		new IWebFrame (result[0]).Release ();
	}
	if (top) {
		StatusTextEvent statusText = new StatusTextEvent (browser);
		statusText.display = display;
		statusText.widget = browser;
		statusText.text = url2;
		StatusTextListener[] statusTextListeners = browser.webBrowser.statusTextListeners;
		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;
	LocationListener[] locationListeners = browser.webBrowser.locationListeners;
	for (int i = 0; i < locationListeners.length; i++) {
		locationListeners[i].changed (location);
	}
	return COM.S_OK;
}

int didClearWindowObject (int /*long*/ webView, int /*long*/ context, int /*long*/ windowScriptObject, int /*long*/ frame) {
	WebKit_win32.JSGlobalContextRetain (context);
	int /*long*/ globalObject = WebKit_win32.JSContextGetGlobalObject (context);
	int /*long*/ privateData = ((WebKit)browser.webBrowser).webViewData;
	int /*long*/ externalObject = WebKit_win32.JSObjectMake (context, WebKit.ExternalClass, privateData);
	byte[] bytes = null;
	try {
		bytes = (OBJECTNAME_EXTERNAL + '\0').getBytes (WebKit.CHARSET_UTF8);
	} catch (UnsupportedEncodingException e) {
		bytes = (OBJECTNAME_EXTERNAL + '\0').getBytes ();
	} 
	int /*long*/ name = WebKit_win32.JSStringCreateWithUTF8CString (bytes);
	WebKit_win32.JSObjectSetProperty (context, globalObject, name, externalObject, 0, null);
	WebKit_win32.JSStringRelease (name);

	Enumeration elements = browser.webBrowser.functions.elements ();
	while (elements.hasMoreElements ()) {
		BrowserFunction current = (BrowserFunction)elements.nextElement ();
		browser.execute (current.functionString);
	}

	IWebView iwebView = new IWebView (webView);
	int /*long*/[] mainFrame = new int /*long*/[1];
	iwebView.mainFrame (mainFrame);
	boolean top = mainFrame[0] == frame;
	new IWebFrame (mainFrame[0]).Release ();
	addEventHandlers (top);
	return COM.S_OK;
}

int didCommitLoadForFrame (int /*long*/ webview, int /*long*/ frame) {
	IWebFrame iWebFrame = new IWebFrame (frame);
	int /*long*/[] result = new int /*long*/[1];
	int hr = iWebFrame.dataSource (result);
	if (hr != COM.S_OK || result[0] == 0) {
		return COM.S_OK;
    }
	IWebDataSource dataSource = new IWebDataSource (result[0]);
	result[0] = 0;
	hr = dataSource.request (result);
	dataSource.Release ();
	if (hr != COM.S_OK || result[0] == 0) {
		return COM.S_OK;
	}
	IWebMutableURLRequest request = new IWebMutableURLRequest (result[0]);
	result[0] = 0;
	hr = request.URL (result);
	request.Release ();
	if (hr != COM.S_OK || result[0] == 0) {
		return COM.S_OK;
	}
	String url2 = WebKit.extractBSTR (result[0]);
	COM.SysFreeString (result[0]);
	if (url2.length () == 0) 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 (url2.equals (WebKit.URI_FILEROOT)) {
		url2 = WebKit.ABOUT_BLANK;
	} else {
		int length = WebKit.URI_FILEROOT.length ();
		if (url2.startsWith (WebKit.URI_FILEROOT) && url2.charAt (length) == '#') {
			url2 = WebKit.ABOUT_BLANK + url2.substring (length);
		}
	}
	Display display = browser.getDisplay ();
	result[0] = 0;
	IWebView iwebView = new IWebView (webview);
	hr = iwebView.mainFrame (result);
	boolean top = false;
	if (hr == COM.S_OK && result[0] != 0) {
		top = frame == result[0];
		new IWebFrame (result[0]).Release ();
	}
	if (top) {
		/* reset resource status variables */
		this.url = url2;

		/*
		* Each invocation of setText() causes webView_didCommitLoadForFrame to be invoked
		* twice, once for the initial navigate to about:blank, and once for the auto-navigate
		* to about:blank that WebKit does when loadHTMLString is invoked.  If this is the
		* first webView_didCommitLoadForFrame callback received for a setText() invocation
		* then do not send any events or re-install registered BrowserFunctions. 
		*/
		if (url2.startsWith (WebKit.ABOUT_BLANK) && html != null) return COM.S_OK;

		/* re-install registered functions */
		Enumeration elements = browser.webBrowser.functions.elements ();
		while (elements.hasMoreElements ()) {
			BrowserFunction function = (BrowserFunction)elements.nextElement ();
			browser.webBrowser.execute (function.functionString);
		}

		ProgressEvent progress = new ProgressEvent (browser);
		progress.display = display;
		progress.widget = browser;
		progress.current = 1;
		progress.total = WebKit.MAX_PROGRESS;
		ProgressListener[] progressListeners = browser.webBrowser.progressListeners;
		for (int i = 0; i < progressListeners.length; i++) {
			progressListeners[i].changed (progress);
		}
		if (browser.isDisposed ()) return COM.S_OK;

		StatusTextEvent statusText = new StatusTextEvent (browser);
		statusText.display = display;
		statusText.widget = browser;
		statusText.text = url2;
		StatusTextListener[] statusTextListeners = browser.webBrowser.statusTextListeners;
		for (int i = 0; i < statusTextListeners.length; i++) {
			statusTextListeners[i].changed (statusText);
		}
		if (browser.isDisposed ()) return COM.S_OK;
	}
	LocationEvent location = new LocationEvent (browser);
	location.display = display;
	location.widget = browser;
	location.location = url2;
	location.top = top;
	LocationListener[] locationListeners = browser.webBrowser.locationListeners;
	for (int i = 0; i < locationListeners.length; i++) {
		locationListeners[i].changed (location);
	}
	return COM.S_OK;
}

int didFailProvisionalLoadWithError (int /*long*/ webView, int /*long*/ error, int /*long*/ frame) {
	IWebError iweberror = new IWebError (error);
	int[] errorCode = new int[1];
	int hr = iweberror.code (errorCode);
	if (WebKit_win32.WebURLErrorBadURL < errorCode[0]) return COM.S_OK;

	String failingURLString = null;
	int /*long*/[] failingURL = new int /*long*/[1];
	hr = iweberror.failingURL (failingURL);
	if (hr == COM.S_OK && failingURL[0] != 0) {
		failingURLString = WebKit.extractBSTR (failingURL[0]);
		COM.SysFreeString (failingURL[0]);
	}
	if (failingURLString != null && WebKit_win32.WebURLErrorServerCertificateNotYetValid <= errorCode[0] && errorCode[0] <= WebKit_win32.WebURLErrorSecureConnectionFailed) {
		/* handle invalid certificate error */
		int /*long*/[] result = new int /*long*/[1];
		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]);

		result[0] = 0;
		hr = iweberror.QueryInterface (WebKit_win32.IID_IWebErrorPrivate, result);
		if (hr != COM.S_OK || result[0] == 0) {
			return COM.S_OK;
		}

		IWebErrorPrivate webErrorPrivate = new IWebErrorPrivate (result[0]);
		result[0] = 0;
		int /*long*/[] certificate = new int /*long*/[1];
		hr = webErrorPrivate.sslPeerCertificate (certificate);
		webErrorPrivate.Release ();
		if (hr != COM.S_OK || certificate[0] == 0) {
			return COM.S_OK;
		}
		if (showCertificateDialog (webView, failingURLString, description, certificate[0])) {
			IWebFrame iWebFrame = new IWebFrame (frame);
			hr = WebKit_win32.WebKitCreateInstance (WebKit_win32.CLSID_WebMutableURLRequest, 0, WebKit_win32.IID_IWebMutableURLRequest, result);
			if (hr != COM.S_OK || result[0] == 0) {
				certificate[0] = 0;
				return COM.S_OK;
			}
			IWebMutableURLRequest request = new IWebMutableURLRequest (result[0]);
			request.setURL (failingURL[0]);
			request.setAllowsAnyHTTPSCertificate ();
			iWebFrame.loadRequest (request.getAddress ());
			request.Release ();
		}
		certificate[0] = 0;
		return COM.S_OK;
	}

	/* handle other types of errors */
	int /*long*/[] result = new int /*long*/[1];
	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]);
	if (!browser.isDisposed ()) {
		String message = failingURLString != null ? failingURLString + "\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;
}

int didFinishLoadForFrame (int /*long*/ webview, int /*long*/ frame) {
	IWebView iWebView = new IWebView (webview);
	int /*long*/[] iWebFrame = new int /*long*/[1];
	int hr = iWebView.mainFrame (iWebFrame);
	if (hr != COM.S_OK || iWebFrame[0] == 0) {
		return COM.S_OK;
	}
	boolean top = frame == iWebFrame[0];
	new IWebFrame (iWebFrame[0]).Release();
	if (!top) return COM.S_OK;

	/*
	 * 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 (WebKit.ABOUT_BLANK)) {
			((WebKit)browser.webBrowser).loadingText = true;
			int /*long*/ string = WebKit.createBSTR (html);
			int /*long*/ URLString;
			if (((WebKit)browser.webBrowser).untrustedText) {
				URLString = WebKit.createBSTR (WebKit.ABOUT_BLANK);
			} else {
				URLString = WebKit.createBSTR (WebKit.URI_FILEROOT);
			}
			IWebFrame mainFrame = new IWebFrame (frame);
			mainFrame.loadHTMLString (string, URLString);
			html = null;
		}
	}

	/*
	* The loadHTMLString() invocation above will trigger a second 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 (!((WebKit)browser.webBrowser).loadingText) {
		if (browser.isDisposed ()) return COM.S_OK;
		/*
		* To be consistent with other platforms a title event should be fired when a
		* page has completed loading.  A page with a