| /******************************************************************************* |
| * Copyright (c) 2015 Tasktop Technologies 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: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.tasks.ui; |
| |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.jface.fieldassist.ContentProposal; |
| import org.eclipse.jface.fieldassist.IContentProposal; |
| import org.eclipse.jface.fieldassist.IContentProposalProvider; |
| import org.eclipse.mylyn.internal.tasks.ui.editors.LabelsAttributeEditor; |
| |
| import com.google.common.base.Function; |
| import com.google.common.collect.FluentIterable; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Ordering; |
| |
| public class OptionsProposalProvider implements IContentProposalProvider { |
| |
| private static final String VALUE_SEPARATOR = ","; //$NON-NLS-1$ |
| |
| private final Set<String> proposals; |
| |
| private final boolean isMultiSelect; |
| |
| public OptionsProposalProvider(Map<String, String> proposals, boolean isMultiSelect) { |
| this.proposals = proposals.keySet(); |
| this.isMultiSelect = isMultiSelect; |
| } |
| |
| @Override |
| public IContentProposal[] getProposals(String contents, int position) { |
| Set<String> filteredProposals = new HashSet<>(proposals); |
| filteredProposals.remove(""); //$NON-NLS-1$ |
| String lastValue = ""; //$NON-NLS-1$ |
| // If the attribute is of type multi-select, filter the past values from the proposals |
| if (isMultiSelect) { |
| String[] contentsArray = contents.split(VALUE_SEPARATOR, -1); |
| if (contentsArray.length > 0) { |
| List<String> trimmedContents = LabelsAttributeEditor.getTrimmedValues(contentsArray); |
| filteredProposals.removeAll(trimmedContents); |
| lastValue = contentsArray[contentsArray.length - 1].trim(); |
| } |
| } else { |
| lastValue = contents; |
| } |
| |
| // If there is a last value, then filter the remaining the proposals to contain it |
| if (!lastValue.isEmpty()) { |
| for (Iterator<String> iterator = filteredProposals.iterator(); iterator.hasNext();) { |
| String proposal = iterator.next(); |
| if (!proposal.toLowerCase().contains(lastValue.toLowerCase())) { |
| iterator.remove(); |
| } |
| |
| } |
| } |
| // Since the contents of the editor is replaced, we need to include the existing values in the replacement |
| final String existingValues = contents.substring(0, contents.length() - lastValue.length()); |
| ImmutableList<String> sortedProposals = FluentIterable.from(filteredProposals).toSortedList( |
| Ordering.from(String.CASE_INSENSITIVE_ORDER)); |
| return FluentIterable.from(sortedProposals).transform(new Function<String, IContentProposal>() { |
| public IContentProposal apply(String proposal) { |
| return new ContentProposal(existingValues + proposal, proposal, null); |
| } |
| }).toArray(IContentProposal.class); |
| } |
| |
| public boolean isMultiSelect() { |
| return isMultiSelect; |
| } |
| } |