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/*******************************************************************************
* Copyright (c) 2010, 2017 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.browser;
import java.io.*;
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.layout.*;
import org.eclipse.swt.widgets.*;
class WebDownloadDelegate {
COMObject iWebDownloadDelegate;
Browser browser;
int refCount = 0;
int status = -1;
long size, totalSize;
String url;
static final int DOWNLOAD_FINISHED = 0;
static final int DOWNLOAD_CANCELLED = 1;
static final int DOWNLOAD_ERROR = 3;
WebDownloadDelegate (Browser browser) {
createCOMInterfaces ();
this.browser = browser;
}
int AddRef () {
refCount++;
return refCount;
}
void createCOMInterfaces () {
iWebDownloadDelegate = new COMObject (new int[] {2, 0, 0, 2, 2, 2, 2, 2, 2, 2, 3, 3, 4, 1, 1}) {
@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 decideDestinationWithSuggestedFilename (args[0], args[1]);}
@Override
public long /*int*/ method4 (long /*int*/[] args) {return COM.E_NOTIMPL;}
@Override
public long /*int*/ method5 (long /*int*/[] args) {return COM.E_NOTIMPL;}
@Override
public long /*int*/ method6 (long /*int*/[] args) {return didFailWithError (args[0], args[1]);}
@Override
public long /*int*/ method7 (long /*int*/[] args) {return COM.E_NOTIMPL;}
@Override
public long /*int*/ method8 (long /*int*/[] args) {return didReceiveDataOfLength (args[0], (int)/*64*/args[1]);}
@Override
public long /*int*/ method9 (long /*int*/[] args) {return didReceiveResponse (args[0], args[1]);}
@Override
public long /*int*/ method10 (long /*int*/[] args) {return COM.E_NOTIMPL;}
@Override
public long /*int*/ method11 (long /*int*/[] args) {return COM.E_NOTIMPL;}
@Override
public long /*int*/ method12 (long /*int*/[] args) {return willSendRequest (args[0], args[1], args[2], args[3]);}
@Override
public long /*int*/ method13 (long /*int*/[] args) {return didBegin (args[0]);}
@Override
public long /*int*/ method14 (long /*int*/[] args) {return didFinish (args[0]);}
};
}
int decideDestinationWithSuggestedFilename (long /*int*/ download, long /*int*/ filename) {
String name = WebKit.extractBSTR (filename);
FileDialog dialog = new FileDialog (browser.getShell(), SWT.SAVE);
dialog.setText (SWT.getMessage ("SWT_FileDownload")); //$NON-NLS-1$
dialog.setFileName (name);
dialog.setOverwrite (true);
String path = dialog.open ();
IWebDownload iwebdownload = new IWebDownload (download);
iwebdownload.setDeletesFileUponFailure (0);
if (path == null) {
/*
* Bug in WebKit. Failure to set a non-null destination on the IWebDownload results in
* a crash, even when the download is being cancelled.
*/
iwebdownload.setDestination (WebKit.createBSTR (""), 1); //$NON-NLS-1$
iwebdownload.cancel();
iwebdownload.Release();
} else {
File file = new File (path);
if (file.exists ()) file.delete ();
iwebdownload.setDestination (WebKit.createBSTR (path), 1);
openDownloadWindow (iwebdownload, path);
}
return COM.S_OK;
}
int didBegin (long /*int*/ download) {
new IWebDownload (download).AddRef ();
status = -1;
size = 0;
totalSize = 0;
url = null;
return COM.S_OK;
}
int didFailWithError (long /*int*/ download, long /*int*/ error) {
new IWebDownload (download).Release ();
status = DOWNLOAD_ERROR;
return COM.S_OK;
}
int didFinish (long /*int*/ download) {
new IWebDownload (download).Release ();
status = DOWNLOAD_FINISHED;
return COM.S_OK;
}
int didReceiveDataOfLength (long /*int*/ download, int length) {
size += length;
return COM.S_OK;
}
int didReceiveResponse (long /*int*/ download, long /*int*/ response) {
if (response != 0) {
IWebURLResponse urlResponse = new IWebURLResponse (response);
long[] size = new long[1];
int hr = urlResponse.expectedContentLength (size);
if (hr == COM.S_OK) totalSize = size[0];
long /*int*/[] result = new long /*int*/[1];
hr = urlResponse.URL (result);
if (hr == COM.S_OK && result[0] != 0) {
url = WebKit.extractBSTR (result[0]);
COM.SysFreeString (result[0]);
}
}
return COM.S_OK;
}
void disposeCOMInterfaces () {
if (iWebDownloadDelegate != null) {
iWebDownloadDelegate.dispose ();
iWebDownloadDelegate = null;
}
}
long /*int*/ getAddress () {
return iWebDownloadDelegate.getAddress ();
}
void openDownloadWindow (final IWebDownload download, String name) {
final Shell shell = new Shell ();
shell.setText (Compatibility.getMessage ("SWT_FileDownload")); //$NON-NLS-1$
GridLayout gridLayout = new GridLayout ();
gridLayout.marginHeight = 15;
gridLayout.marginWidth = 15;
gridLayout.verticalSpacing = 20;
shell.setLayout (gridLayout);
Label nameLabel = new Label (shell, SWT.WRAP);
nameLabel.setText (Compatibility.getMessage ("SWT_Download_Location", new Object[] {name, url})); //$NON-NLS-1$
GridData data = new GridData ();
Monitor monitor = browser.getMonitor ();
int maxWidth = monitor.getBounds ().width / 2;
int width = nameLabel.computeSize (SWT.DEFAULT, SWT.DEFAULT).x;
data.widthHint = Math.min (width, maxWidth);
data.horizontalAlignment = GridData.FILL;
data.grabExcessHorizontalSpace = true;
nameLabel.setLayoutData (data);
final Label statusLabel = new Label (shell, SWT.NONE);
statusLabel.setText (Compatibility.getMessage ("SWT_Download_Started")); //$NON-NLS-1$
data = new GridData (GridData.FILL_BOTH);
statusLabel.setLayoutData (data);
final Button cancel = new Button (shell, SWT.PUSH);
cancel.setText (Compatibility.getMessage ("SWT_Cancel")); //$NON-NLS-1$
data = new GridData ();
data.horizontalAlignment = GridData.CENTER;
cancel.setLayoutData (data);
final Listener cancelListener = event -> {
download.cancel ();
status = DOWNLOAD_CANCELLED;
download.Release ();
};
cancel.addListener (SWT.Selection, cancelListener);
final Display display = browser.getDisplay ();
final int INTERVAL = 500;
display.timerExec (INTERVAL, new Runnable () {
@Override
public void run () {
if (shell.isDisposed () || status == DOWNLOAD_FINISHED || status == DOWNLOAD_CANCELLED) {
shell.dispose ();
return;
}
if (status == DOWNLOAD_ERROR) {
statusLabel.setText (Compatibility.getMessage ("SWT_Download_Error")); //$NON-NLS-1$
cancel.removeListener (SWT.Selection, cancelListener);
cancel.addListener (SWT.Selection, event -> shell.dispose ());
return;
}
long current = size / 1024L;
long total = totalSize / 1024L;
String message = Compatibility.getMessage ("SWT_Download_Status", new Object[] {current, total}); //$NON-NLS-1$
statusLabel.setText (message);
display.timerExec (INTERVAL, this);
}
});
shell.pack ();
shell.open ();
}
int QueryInterface (long /*int*/ riid, long /*int*/ 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)) {
OS.MoveMemory (ppvObject, new long /*int*/[] {iWebDownloadDelegate.getAddress ()}, C.PTR_SIZEOF);
new IUnknown (iWebDownloadDelegate.getAddress ()).AddRef ();
return COM.S_OK;
}
if (COM.IsEqualGUID (guid, WebKit_win32.IID_IWebDownloadDelegate)) {
OS.MoveMemory (ppvObject, new long /*int*/[] {iWebDownloadDelegate.getAddress ()}, C.PTR_SIZEOF);
new IUnknown (iWebDownloadDelegate.getAddress ()).AddRef ();
return COM.S_OK;
}
OS.MoveMemory (ppvObject, new long /*int*/[] {0}, C.PTR_SIZEOF);
return COM.E_NOINTERFACE;
}
int Release () {
refCount--;
if (refCount == 0) {
disposeCOMInterfaces ();
}
return refCount;
}
int willSendRequest (long /*int*/ download, long /*int*/ request, long /*int*/ redirectResponse, long /*int*/ finalRequest) {
IWebMutableURLRequest req = new IWebMutableURLRequest (request);
req.AddRef ();
OS.MoveMemory (finalRequest, new long /*int*/[] {request}, C.PTR_SIZEOF);
return COM.S_OK;
}
}
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