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MarketplaceDropAdapter.java
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MarketplaceDropAdapter.java
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/*******************************************************************************
* Copyright (c) 2011, 2018 The Eclipse Foundation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* The Eclipse Foundation - initial API and implementation
* Yatta Solutions - public API (bug 432803), drag&drop (bug 433333)
*******************************************************************************/
package org.eclipse.epp.internal.mpc.ui.wizards;
import java.lang.reflect.Field;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.epp.internal.mpc.ui.MarketplaceClientUi;
import org.eclipse.epp.internal.mpc.ui.MarketplaceClientUiPlugin;
import org.eclipse.epp.mpc.ui.MarketplaceUrlHandler;
import org.eclipse.epp.mpc.ui.MarketplaceUrlHandler.SolutionInstallationInfo;
import org.eclipse.jface.util.Util;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTarget;
import org.eclipse.swt.dnd.DropTargetAdapter;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.DropTargetListener;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.dnd.TransferData;
import org.eclipse.swt.dnd.URLTransfer;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IPageListener;
import org.eclipse.ui.IPartListener2;
import org.eclipse.ui.IPartService;
import org.eclipse.ui.IPerspectiveDescriptor;
import org.eclipse.ui.IPerspectiveListener;
import org.eclipse.ui.IStartup;
import org.eclipse.ui.IWindowListener;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPartReference;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.progress.UIJob;
/**
* @author Benjamin Muskalla
* @author Carsten Reckord
*/
public class MarketplaceDropAdapter implements IStartup {
private static final int[] PREFERRED_DROP_OPERATIONS = { DND.DROP_DEFAULT, DND.DROP_COPY, DND.DROP_MOVE,
DND.DROP_LINK };
private static final int DROP_OPERATIONS = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK | DND.DROP_DEFAULT;
private final DropTargetAdapter dropListener = new MarketplaceDropTargetListener();
private final WorkbenchListener workbenchListener = new WorkbenchListener();
private Transfer[] transferAgents;
@Override
public void earlyStartup() {
UIJob registerJob = new UIJob(Display.getDefault(), Messages.MarketplaceDropAdapter_0) {
{
setPriority(Job.SHORT);
setSystem(true);
}
@Override
public IStatus runInUIThread(IProgressMonitor monitor) {
IWorkbench workbench = PlatformUI.getWorkbench();
workbench.addWindowListener(workbenchListener);
IWorkbenchWindow[] workbenchWindows = workbench
.getWorkbenchWindows();
for (IWorkbenchWindow window : workbenchWindows) {
workbenchListener.hookWindow(window);
}
return Status.OK_STATUS;
}
};
registerJob.schedule();
}
public void installDropTarget(final Shell shell) {
hookUrlTransfer(shell, dropListener);
}
private DropTarget hookUrlTransfer(final Shell shell, DropTargetAdapter dropListener) {
DropTarget target = findDropTarget(shell);
if (target != null) {
//target exists, get it and check proper registration
registerWithExistingTarget(target);
} else {
target = new DropTarget(shell, DROP_OPERATIONS);
if (transferAgents == null) {
transferAgents = new Transfer[] { URLTransfer.getInstance() };
}
target.setTransfer(transferAgents);
}
registerDropListener(target, dropListener);
Control[] children = shell.getChildren();
for (Control child : children) {
hookRecursive(child, dropListener);
}
return target;
}
private void registerDropListener(DropTarget target, DropTargetListener dropListener) {
target.removeDropListener(dropListener);
target.addDropListener(dropListener);
}
private void hookRecursive(Control child, DropTargetListener dropListener) {
DropTarget childTarget = findDropTarget(child);
if (childTarget != null) {
registerWithExistingTarget(childTarget);
registerDropListener(childTarget, dropListener);
}
if (child instanceof Composite) {
Composite composite = (Composite) child;
// Bug 485245 - avoid UI freezes for deeply nested widget trees
composite.getDisplay().asyncExec(() -> {
Control[] children = composite.getChildren();
for (Control control : children) {
hookRecursive(control, dropListener);
}
});
}
}
private void registerWithExistingTarget(DropTarget target) {
Transfer[] transfers = target.getTransfer();
boolean exists = false;
if (transfers != null) {
for (Transfer transfer : transfers) {
if (transfer instanceof URLTransfer) {
exists = true;
break;
}
}
if (!exists) {
Transfer[] newTransfers = new Transfer[transfers.length + 1];
System.arraycopy(transfers, 0, newTransfers, 0, transfers.length);
newTransfers[transfers.length] = URLTransfer.getInstance();
target.setTransfer(newTransfers);
}
}
}
private DropTarget findDropTarget(Control control) {
if (control.isDisposed()) {
return null;
}
Object object = control.getData(DND.DROP_TARGET_KEY);
if (object instanceof DropTarget) {
return (DropTarget) object;
}
return null;
}
protected void proceedInstallation(String url) {
SolutionInstallationInfo info = MarketplaceUrlHandler.createSolutionInstallInfo(url);
if (info != null) {
MarketplaceUrlHandler.triggerInstall(info);
}
}
protected void proceedFavorites(String url) {
MarketplaceUrlHandler.triggerFavorites(url);
}
protected boolean acceptSolutionUrl(final String url) {
return MarketplaceUrlHandler.isPotentialSolution(url);
}
protected boolean acceptFavoritesListUrl(final String url) {
return MarketplaceUrlHandler.isPotentialFavoritesList(url);
}
private class MarketplaceDropTargetListener extends DropTargetAdapter {
@Override
public void dragEnter(DropTargetEvent e) {
updateDragDetails(e);
}
@Override
public void dragOver(DropTargetEvent e) {
updateDragDetails(e);
}
@Override
public void dragLeave(DropTargetEvent e) {
if (e.detail == DND.DROP_NONE) {
setDropOperation(e);
}
}
@Override
public void dropAccept(DropTargetEvent e) {
updateDragDetails(e);
}
@Override
public void dragOperationChanged(DropTargetEvent e) {
updateDragDetails(e);
}
private void setDropOperation(DropTargetEvent e) {
int allowedOperations = e.operations;
for (int op : PREFERRED_DROP_OPERATIONS) {
if ((allowedOperations & op) != 0) {
traceDropOperation(op);
e.detail = op;
return;
}
}
e.detail = allowedOperations;
}
private void updateDragDetails(DropTargetEvent e) {
if (dropTargetIsValid(e, false)) {
setDropOperation(e);
}
}
private boolean dropTargetIsValid(DropTargetEvent e, boolean isDrop) {
if (URLTransfer.getInstance().isSupportedType(e.currentDataType)) {
//on Windows, we get the URL already during drag operations...
//FIXME find a way to check the URL early on other platforms, too...
if (isDrop || Util.isWindows()) {
if (e.data == null && !extractEventData(e)) {
traceMissingEventData(e);
//... but if we don't, it's no problem, unless this is already
//the final drop event
return !isDrop;
}
final String url = getUrl(e.data);
if (acceptSolutionUrl(url)) {
return true;
} else if (acceptFavoritesListUrl(url)) {
return true;
} else {
traceInvalidEventData(e);
return false;
}
}
return true;
}
traceUnsupportedDataType(e);
return false;
}
private boolean extractEventData(DropTargetEvent e) {
TransferData transferData = e.currentDataType;
if (transferData != null) {
Object data = URLTransfer.getInstance().nativeToJava(transferData);
if (data != null && getUrl(data) != null) {
e.data = data;
return true;
}
}
return false;
}
@Override
public void drop(DropTargetEvent event) {
if (!URLTransfer.getInstance().isSupportedType(event.currentDataType)) {
traceUnsupportedDataType(event);
//ignore
return;
}
if (event.data == null) {
traceMissingEventData(event);
//reject
event.detail = DND.DROP_NONE;
return;
}
if (!dropTargetIsValid(event, true)) {
//reject
event.detail = DND.DROP_NONE;
return;
}
final String url = getUrl(event.data);
if (acceptSolutionUrl(url)) {
//http://marketplace.eclipse.org/marketplace-client-intro?mpc_install=1640500
DropTarget source = (DropTarget) event.getSource();
Display display = source.getDisplay();
display.asyncExec(() -> proceedInstallation(url));
} else if (acceptFavoritesListUrl(url)) {
//https://marketplace.eclipse.org/user/xxx/favorites
DropTarget source = (DropTarget) event.getSource();
Display display = source.getDisplay();
display.asyncExec(() -> proceedFavorites(url));
} else {
traceInvalidEventData(event);
}
}
private void traceDropOperation(int op) {
if (MarketplaceClientUiPlugin.DEBUG) {
MarketplaceClientUiPlugin.trace(MarketplaceClientUiPlugin.DROP_ADAPTER_DEBUG_OPTION,
"Updating drop event: Setting drop operation to {0}", op); //$NON-NLS-1$
}
}
private void traceInvalidEventData(DropTargetEvent event) {
if (MarketplaceClientUiPlugin.DEBUG) {
MarketplaceClientUiPlugin.trace(MarketplaceClientUiPlugin.DROP_ADAPTER_DEBUG_OPTION,
"Drop event: Data is not a solution url: {0}", event.data, new Throwable()); //$NON-NLS-1$
}
}
private void traceMissingEventData(DropTargetEvent event) {
if (MarketplaceClientUiPlugin.DEBUG) {
MarketplaceClientUiPlugin.trace(MarketplaceClientUiPlugin.DROP_ADAPTER_DEBUG_OPTION,
"Missing drop event data {0}", event.data, new Throwable()); //$NON-NLS-1$
}
}
private void traceUnsupportedDataType(DropTargetEvent event) {
if (MarketplaceClientUiPlugin.DEBUG) {
MarketplaceClientUiPlugin.trace(MarketplaceClientUiPlugin.DROP_ADAPTER_DEBUG_OPTION,
"Unsupported drop data type {0}", traceTransferData(event.currentDataType), new Throwable()); //$NON-NLS-1$
}
}
private Object traceTransferData(TransferData data) {
if (MarketplaceClientUiPlugin.DEBUG) {
return new TransferDataTraceFormatter(data);
}
return null;
}
private String getUrl(Object eventData) {
if (eventData == null) {
return null;
}
if (eventData == null || !(eventData instanceof String)) {
return null;
}
// Depending on the form the link and browser/os,
// we get the url twice in the data separated by new lines
String[] dataLines = ((String) eventData).split(System.getProperty("line.separator")); //$NON-NLS-1$
String url = dataLines[0];
return url;
}
}
private static final class TransferDataTraceFormatter {
private static final Field TYPE_FIELD;
static {
Field typeField = null;
try {
typeField = TransferData.class.getDeclaredField("type"); //$NON-NLS-1$
typeField.setAccessible(true);
} catch (Exception e) {
}
TYPE_FIELD = typeField;
}
private final TransferData transferData;
public TransferDataTraceFormatter(TransferData transferData) {
this.transferData = transferData;
}
@Override
public String toString() {
if (transferData == null) {
return null;
}
return "TransferData[type=" + getType() + "]"; //$NON-NLS-1$//$NON-NLS-2$
}
private String getType() {
if (TYPE_FIELD == null) {
return "<unknown>"; //$NON-NLS-1$
}
try {
Object type = TYPE_FIELD.get(transferData);
return type == null ? null : type.toString();
} catch (IllegalArgumentException e) {
return "<unknown:" + transferData.getClass() + ">"; //$NON-NLS-1$ //$NON-NLS-2$
} catch (IllegalAccessException e) {
return "<inaccessible>"; //$NON-NLS-1$
}
}
}
private class WorkbenchListener implements IPartListener2, IPageListener, IPerspectiveListener, IWindowListener {
@Override
public void perspectiveActivated(IWorkbenchPage page, IPerspectiveDescriptor perspective) {
pageChanged(page);
}
@Override
public void perspectiveChanged(IWorkbenchPage page, IPerspectiveDescriptor perspective, String changeId) {
}
@Override
public void pageActivated(IWorkbenchPage page) {
pageChanged(page);
}
@Override
public void pageClosed(IWorkbenchPage page) {
}
@Override
public void pageOpened(IWorkbenchPage page) {
pageChanged(page);
}
private void pageChanged(IWorkbenchPage page) {
if (page == null) {
return;
}
IWorkbenchWindow workbenchWindow = page.getWorkbenchWindow();
windowChanged(workbenchWindow);
}
@Override
public void windowActivated(IWorkbenchWindow window) {
windowChanged(window);
}
private void windowChanged(IWorkbenchWindow window) {
if (window == null) {
return;
}
Shell shell = window.getShell();
runUpdate(shell);
}
@Override
public void windowDeactivated(IWorkbenchWindow window) {
}
@Override
public void windowClosed(IWorkbenchWindow window) {
}
@Override
public void windowOpened(IWorkbenchWindow window) {
hookWindow(window);
}
public void hookWindow(IWorkbenchWindow window) {
if (window == null) {
return;
}
window.addPageListener(this);
window.addPerspectiveListener(this);
IPartService partService = window.getService(IPartService.class);
partService.addPartListener(this);
windowChanged(window);
}
@Override
public void partOpened(IWorkbenchPartReference partRef) {
partUpdate(partRef);
}
@Override
public void partActivated(IWorkbenchPartReference partRef) {
partUpdate(partRef);
}
@Override
public void partBroughtToTop(IWorkbenchPartReference partRef) {
partUpdate(partRef);
}
@Override
public void partVisible(IWorkbenchPartReference partRef) {
}
@Override
public void partClosed(IWorkbenchPartReference partRef) {
partUpdate(partRef);
}
@Override
public void partDeactivated(IWorkbenchPartReference partRef) {
partUpdate(partRef);
}
@Override
public void partHidden(IWorkbenchPartReference partRef) {
partUpdate(partRef);
}
@Override
public void partInputChanged(IWorkbenchPartReference partRef) {
}
private void partUpdate(IWorkbenchPartReference partRef) {
if (partRef == null) {
return;
}
IWorkbenchPage page = partRef.getPage();
pageChanged(page);
}
private void runUpdate(final Shell shell) {
if (shell == null || shell.isDisposed()) {
return;
}
Display display = shell.getDisplay();
if (display == null || display.isDisposed()) {
return;
}
try {
display.asyncExec(() -> {
if (!shell.isDisposed()) {
installDropTarget(shell);
}
});
} catch (SWTException ex) {
if (ex.code == SWT.ERROR_DEVICE_DISPOSED) {
//ignore
return;
}
MarketplaceClientUi.error(ex);
} catch (RuntimeException ex) {
MarketplaceClientUi.error(ex);
}
}
}
}