r/org.eclipse.statet.r.ui/srcDebug/org/eclipse/statet/internal/r/objectbrowser/DeleteHandler.java - statet/org.eclipse.statet-r - Git at Google

 /*=============================================================================#
  # Copyright (c) 2009, 2019 Stephan Wahlbrink and others.
  #
  # This program and the accompanying materials are made available under the
  # terms of the Eclipse Public License 2.0 which is available at
  # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
  # which is available at https://www.apache.org/licenses/LICENSE-2.0.
  #
  # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
  #
  # Contributors:
  #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
  #=============================================================================*/

 package org.eclipse.statet.internal.r.objectbrowser;

 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Comparator;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;

 import org.eclipse.core.commands.AbstractHandler;
 import org.eclipse.core.commands.ExecutionEvent;
 import org.eclipse.core.commands.ExecutionException;
 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.jface.viewers.IElementComparer;
 import org.eclipse.jface.viewers.ITreeSelection;
 import org.eclipse.jface.viewers.TreePath;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.ui.ISharedImages;
 import org.eclipse.ui.PlatformUI;

 import org.eclipse.statet.jcommons.lang.Nullable;
 import org.eclipse.statet.jcommons.status.ProgressMonitor;
 import org.eclipse.statet.jcommons.status.StatusException;
 import org.eclipse.statet.jcommons.ts.core.Tool;

 import org.eclipse.statet.ecommons.models.core.util.ElementPartition;
 import org.eclipse.statet.ecommons.ts.ui.ToolRunnableDecorator;
 import org.eclipse.statet.ecommons.ui.util.UIAccess;

 import org.eclipse.statet.ltk.core.ElementName;
 import org.eclipse.statet.nico.core.runtime.ToolProcess;
 import org.eclipse.statet.nico.ui.util.ToolMessageDialog;
 import org.eclipse.statet.r.console.core.AbstractRDataRunnable;
 import org.eclipse.statet.r.console.core.IRDataAdapter;
 import org.eclipse.statet.r.core.data.CombinedRElement;
 import org.eclipse.statet.r.core.model.RElementName;
 import org.eclipse.statet.r.ui.util.RElementInputContentProvider;
 import org.eclipse.statet.rj.data.RObject;


 class DeleteHandler extends AbstractHandler {


 	private static class DeleteRunnable extends AbstractRDataRunnable implements ToolRunnableDecorator {

 		private final List<String> names;
 		private final List<String> commands;
 		private final Set<ElementName> topEnvirs;

 		public DeleteRunnable(final List<String> names, final List<String> commands,
 				final Set<ElementName> topEnvirs) {
 			super("r/objectbrowser/delete", "Delete Elements"); //$NON-NLS-1$
 			this.names = names;
 			this.commands = commands;
 			this.topEnvirs = topEnvirs;
 		}

 		@Override
 		public Image getImage() {
 			return PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_TOOL_DELETE);
 		}

 		@Override
 		public boolean changed(final int event, final Tool tool) {
 			if (event == MOVING_FROM) {
 				return false;
 			}
 			return true;
 		}

 		@Override
 		protected void run(final IRDataAdapter r,
 				final ProgressMonitor m) throws StatusException {
 			r.briefAboutToChange();
 			try {
 				for (int i = 0; i < this.names.size(); i++) {
 					r.evalVoid(this.commands.get(i), m);
 				}
 			}
 			finally {
 				r.briefChanged(this.topEnvirs, 0);
 			}
 		}

 	}


 	private final ObjectBrowserView view;


 	public DeleteHandler(final ObjectBrowserView view) {
 		this.view = view;
 	}


 	private boolean isValidSelection(final ITreeSelection selection) {
 		if (selection == null || selection.isEmpty()) {
 			return false;
 		}
 		for (final Iterator<?> iter = selection.iterator(); iter.hasNext(); ) {
 			final Object element = iter.next();
 			if (element instanceof ElementPartition) {
 				return false;
 			}
 		}
 		return true;
 	}

 	@Override
 	public void setEnabled(final @Nullable Object evaluationContext) {
 		final ToolProcess process = this.view.getTool();
 		setBaseEnabled(process != null && !process.isTerminated()
 				&& isValidSelection(this.view.getSelection()) );
 	}

 	@Override
 	public @Nullable Object execute(final ExecutionEvent event) throws ExecutionException {
 		if (!UIAccess.isOkToUse(this.view.getViewer())) {
 			return null;
 		}
 		final ITreeSelection selection = this.view.getSelection();
 		if (!isValidSelection(selection)) {
 			return null;
 		}
 		final TreePath[] treePaths = selection.getPaths();
 		Arrays.sort(treePaths, new Comparator<TreePath>() {
 			@Override
 			public int compare(final TreePath o1, final TreePath o2) {
 				return o1.getSegmentCount()-o2.getSegmentCount();
 			}
 		});
 		final IElementComparer comparer = new IElementComparer() {
 			@Override
 			public int hashCode(final Object e) {
 				return e.hashCode();
 			}
 			@Override
 			public boolean equals(final Object e1, final Object e2) {
 				return (e1 == e2);
 			}
 		};
 		final List<String> commands= new ArrayList<>(treePaths.length);
 		final List<String> names= new ArrayList<>(treePaths.length);
 		final Set<ElementName> topEnvirs= new HashSet<>(treePaths.length);
 		ITER_ELEMENTS: for (int i = 0; i < treePaths.length; i++) {
 			for (int j = 0; j < i; j++) {
 				if (treePaths[j] != null && treePaths[i].startsWith(treePaths[j], comparer)) {
 					treePaths[i] = null;
 					continue ITER_ELEMENTS;
 				}
 			}

 			final TreePath treePath = treePaths[i];
 			final CombinedRElement element= RElementInputContentProvider.getCombinedRElement(treePath.getLastSegment());
 			final CombinedRElement parent= element.getModelParent();

 			final RElementName elementName = this.view.getFQElementName(treePath);
 			if (parent != null && elementName != null) {
 				final RElementName topName;
 				switch (parent.getRObjectType()) {
 				case RObject.TYPE_ENVIRONMENT: {
 					final RElementName envirName = (treePath.getSegmentCount() > 1) ? this.view.getFQElementName(treePath.getParentPath()) : parent.getElementName();
 					final ElementName itemName = element.getElementName();
 					topName = elementName.getScope();
 					if (envirName != null) { // elementName ok => segmentName ok
 						commands.add("rm(`"+itemName.getSegmentName()+"`,"+ //$NON-NLS-1$ //$NON-NLS-2$
 								"pos="+RElementName.createDisplayName(envirName, RElementName.DISPLAY_FQN | RElementName.DISPLAY_EXACT)+ //$NON-NLS-1$
 								")"); //$NON-NLS-1$
 						names.add(elementName.getDisplayName());
 						topEnvirs.add(topName);
 						continue ITER_ELEMENTS;
 					}
 					break; }
 				case RObject.TYPE_LIST:
 				case RObject.TYPE_DATAFRAME:
 				case RObject.TYPE_S4OBJECT:
 					topName = elementName.getScope();
 					final String name = RElementName.createDisplayName(elementName, RElementName.DISPLAY_EXACT);
 					commands.add("with("+RElementName.createDisplayName(topName, RElementName.DISPLAY_FQN)+","+ //$NON-NLS-1$ //$NON-NLS-2$
 							name+"<-NULL"+ //$NON-NLS-1$
 							")"); //$NON-NLS-1$
 					names.add(elementName.getDisplayName());
 					topEnvirs.add(topName);
 					continue ITER_ELEMENTS;
 				}
 			}

 			final StringBuilder message = new StringBuilder("Selection contains unsupported object");
 			if (elementName != null) {
 				message.append("\n\t"); //$NON-NLS-1$
 				message.append(elementName.getDisplayName());
 			}
 			else {
 				message.append("."); //$NON-NLS-1$
 			}
 			MessageDialog.openError(this.view.getSite().getShell(), "Delete", message.toString());
 			return null;
 		}

 		final StringBuilder message = new StringBuilder(names.size() == 1 ?
 				"Delete this object?" :
 				NLS.bind("Delete these {0} objects?", names.size()));
 		final int show = (names.size() > 5) ? 3 : names.size();
 		for (int i = 0; i < show; i++) {
 			message.append("\n\t"); //$NON-NLS-1$
 			message.append(names.get(i));
 		}
 		if (show < names.size()) {
 			message.append("\n\t..."); //$NON-NLS-1$
 		}

 		final ToolProcess process = this.view.getTool();
 		if (ToolMessageDialog.openConfirm(process, this.view.getSite().getShell(), "Delete R Objects",
 				message.toString(), "Delete")) {
 			process.getQueue().add(new DeleteRunnable(names, commands, topEnvirs));
 		}

 		return null;
 	}

 }
	/*=============================================================================#
	# Copyright (c) 2009, 2019 Stephan Wahlbrink and others.
	#
	# This program and the accompanying materials are made available under the
	# terms of the Eclipse Public License 2.0 which is available at
	# https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
	# which is available at https://www.apache.org/licenses/LICENSE-2.0.
	#
	# SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
	#
	# Contributors:
	# Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
	#=============================================================================*/

	package org.eclipse.statet.internal.r.objectbrowser;

	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Comparator;
	import java.util.HashSet;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Set;

	import org.eclipse.core.commands.AbstractHandler;
	import org.eclipse.core.commands.ExecutionEvent;
	import org.eclipse.core.commands.ExecutionException;
	import org.eclipse.jface.dialogs.MessageDialog;
	import org.eclipse.jface.viewers.IElementComparer;
	import org.eclipse.jface.viewers.ITreeSelection;
	import org.eclipse.jface.viewers.TreePath;
	import org.eclipse.osgi.util.NLS;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.ui.ISharedImages;
	import org.eclipse.ui.PlatformUI;

	import org.eclipse.statet.jcommons.lang.Nullable;
	import org.eclipse.statet.jcommons.status.ProgressMonitor;
	import org.eclipse.statet.jcommons.status.StatusException;
	import org.eclipse.statet.jcommons.ts.core.Tool;

	import org.eclipse.statet.ecommons.models.core.util.ElementPartition;
	import org.eclipse.statet.ecommons.ts.ui.ToolRunnableDecorator;
	import org.eclipse.statet.ecommons.ui.util.UIAccess;

	import org.eclipse.statet.ltk.core.ElementName;
	import org.eclipse.statet.nico.core.runtime.ToolProcess;
	import org.eclipse.statet.nico.ui.util.ToolMessageDialog;
	import org.eclipse.statet.r.console.core.AbstractRDataRunnable;
	import org.eclipse.statet.r.console.core.IRDataAdapter;
	import org.eclipse.statet.r.core.data.CombinedRElement;
	import org.eclipse.statet.r.core.model.RElementName;
	import org.eclipse.statet.r.ui.util.RElementInputContentProvider;
	import org.eclipse.statet.rj.data.RObject;


	class DeleteHandler extends AbstractHandler {


	private static class DeleteRunnable extends AbstractRDataRunnable implements ToolRunnableDecorator {

	private final List<String> names;
	private final List<String> commands;
	private final Set<ElementName> topEnvirs;

	public DeleteRunnable(final List<String> names, final List<String> commands,
	final Set<ElementName> topEnvirs) {
	super("r/objectbrowser/delete", "Delete Elements"); //$NON-NLS-1$
	this.names = names;
	this.commands = commands;
	this.topEnvirs = topEnvirs;
	}

	@Override
	public Image getImage() {
	return PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_TOOL_DELETE);
	}

	@Override
	public boolean changed(final int event, final Tool tool) {
	if (event == MOVING_FROM) {
	return false;
	}
	return true;
	}

	@Override
	protected void run(final IRDataAdapter r,
	final ProgressMonitor m) throws StatusException {
	r.briefAboutToChange();
	try {
	for (int i = 0; i < this.names.size(); i++) {
	r.evalVoid(this.commands.get(i), m);
	}
	}
	finally {
	r.briefChanged(this.topEnvirs, 0);
	}
	}

	}


	private final ObjectBrowserView view;


	public DeleteHandler(final ObjectBrowserView view) {
	this.view = view;
	}


	private boolean isValidSelection(final ITreeSelection selection) {
	if (selection == null \|\| selection.isEmpty()) {
	return false;
	}
	for (final Iterator<?> iter = selection.iterator(); iter.hasNext(); ) {
	final Object element = iter.next();
	if (element instanceof ElementPartition) {
	return false;
	}
	}
	return true;
	}

	@Override
	public void setEnabled(final @Nullable Object evaluationContext) {
	final ToolProcess process = this.view.getTool();
	setBaseEnabled(process != null && !process.isTerminated()
	&& isValidSelection(this.view.getSelection()) );
	}

	@Override
	public @Nullable Object execute(final ExecutionEvent event) throws ExecutionException {
	if (!UIAccess.isOkToUse(this.view.getViewer())) {
	return null;
	}
	final ITreeSelection selection = this.view.getSelection();
	if (!isValidSelection(selection)) {
	return null;
	}
	final TreePath[] treePaths = selection.getPaths();
	Arrays.sort(treePaths, new Comparator<TreePath>() {
	@Override
	public int compare(final TreePath o1, final TreePath o2) {
	return o1.getSegmentCount()-o2.getSegmentCount();
	}
	});
	final IElementComparer comparer = new IElementComparer() {
	@Override
	public int hashCode(final Object e) {
	return e.hashCode();
	}
	@Override
	public boolean equals(final Object e1, final Object e2) {
	return (e1 == e2);
	}
	};
	final List<String> commands= new ArrayList<>(treePaths.length);
	final List<String> names= new ArrayList<>(treePaths.length);
	final Set<ElementName> topEnvirs= new HashSet<>(treePaths.length);
	ITER_ELEMENTS: for (int i = 0; i < treePaths.length; i++) {
	for (int j = 0; j < i; j++) {
	if (treePaths[j] != null && treePaths[i].startsWith(treePaths[j], comparer)) {
	treePaths[i] = null;
	continue ITER_ELEMENTS;
	}
	}

	final TreePath treePath = treePaths[i];
	final CombinedRElement element= RElementInputContentProvider.getCombinedRElement(treePath.getLastSegment());
	final CombinedRElement parent= element.getModelParent();

	final RElementName elementName = this.view.getFQElementName(treePath);
	if (parent != null && elementName != null) {
	final RElementName topName;
	switch (parent.getRObjectType()) {
	case RObject.TYPE_ENVIRONMENT: {
	final RElementName envirName = (treePath.getSegmentCount() > 1) ? this.view.getFQElementName(treePath.getParentPath()) : parent.getElementName();
	final ElementName itemName = element.getElementName();
	topName = elementName.getScope();
	if (envirName != null) { // elementName ok => segmentName ok
	commands.add("rm(`"+itemName.getSegmentName()+"`,"+ //$NON-NLS-1$ //$NON-NLS-2$
	"pos="+RElementName.createDisplayName(envirName, RElementName.DISPLAY_FQN \| RElementName.DISPLAY_EXACT)+ //$NON-NLS-1$
	")"); //$NON-NLS-1$
	names.add(elementName.getDisplayName());
	topEnvirs.add(topName);
	continue ITER_ELEMENTS;
	}
	break; }
	case RObject.TYPE_LIST:
	case RObject.TYPE_DATAFRAME:
	case RObject.TYPE_S4OBJECT:
	topName = elementName.getScope();
	final String name = RElementName.createDisplayName(elementName, RElementName.DISPLAY_EXACT);
	commands.add("with("+RElementName.createDisplayName(topName, RElementName.DISPLAY_FQN)+","+ //$NON-NLS-1$ //$NON-NLS-2$
	name+"<-NULL"+ //$NON-NLS-1$
	")"); //$NON-NLS-1$
	names.add(elementName.getDisplayName());
	topEnvirs.add(topName);
	continue ITER_ELEMENTS;
	}
	}

	final StringBuilder message = new StringBuilder("Selection contains unsupported object");
	if (elementName != null) {
	message.append("\n\t"); //$NON-NLS-1$
	message.append(elementName.getDisplayName());
	}
	else {
	message.append("."); //$NON-NLS-1$
	}
	MessageDialog.openError(this.view.getSite().getShell(), "Delete", message.toString());
	return null;
	}

	final StringBuilder message = new StringBuilder(names.size() == 1 ?
	"Delete this object?" :
	NLS.bind("Delete these {0} objects?", names.size()));
	final int show = (names.size() > 5) ? 3 : names.size();
	for (int i = 0; i < show; i++) {
	message.append("\n\t"); //$NON-NLS-1$
	message.append(names.get(i));
	}
	if (show < names.size()) {
	message.append("\n\t..."); //$NON-NLS-1$
	}

	final ToolProcess process = this.view.getTool();
	if (ToolMessageDialog.openConfirm(process, this.view.getSite().getShell(), "Delete R Objects",
	message.toString(), "Delete")) {
	process.getQueue().add(new DeleteRunnable(names, commands, topEnvirs));
	}

	return null;
	}

	}