| /******************************************************************************* |
| * Copyright (c) 2005, 2007 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 |
| * Amir Kouchekinia <amir@pyrus.us> - bug 200762 |
| *******************************************************************************/ |
| package org.eclipse.jface.fieldassist; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * SimpleContentProposalProvider is a class designed to map a static list of |
| * Strings to content proposals. |
| * |
| * @see IContentProposalProvider |
| * @since 3.2 |
| * |
| */ |
| public class SimpleContentProposalProvider implements IContentProposalProvider { |
| |
| /* |
| * The proposals provided. |
| */ |
| private String[] proposals; |
| |
| /* |
| * The proposals mapped to IContentProposal. Cached for speed in the case |
| * where filtering is not used. |
| */ |
| private IContentProposal[] contentProposals; |
| |
| /* |
| * Boolean that tracks whether filtering is used. |
| */ |
| private boolean filterProposals = false; |
| |
| /** |
| * Construct a SimpleContentProposalProvider whose content proposals are |
| * always the specified array of Objects. |
| * |
| * @param proposals |
| * the array of Strings to be returned whenever proposals are |
| * requested. |
| */ |
| public SimpleContentProposalProvider(String[] proposals) { |
| super(); |
| this.proposals = proposals; |
| } |
| |
| /** |
| * Return an array of Objects representing the valid content proposals for a |
| * field. |
| * |
| * @param contents |
| * the current contents of the field (only consulted if filtering |
| * is set to <code>true</code>) |
| * @param position |
| * the current cursor position within the field (ignored) |
| * @return the array of Objects that represent valid proposals for the field |
| * given its current content. |
| */ |
| public IContentProposal[] getProposals(String contents, int position) { |
| if (filterProposals) { |
| ArrayList list = new ArrayList(); |
| for (int i = 0; i < proposals.length; i++) { |
| if (proposals[i].length() >= contents.length() |
| && proposals[i].substring(0, contents.length()) |
| .equalsIgnoreCase(contents)) { |
| list.add(makeContentProposal(proposals[i])); |
| } |
| } |
| return (IContentProposal[]) list.toArray(new IContentProposal[list |
| .size()]); |
| } |
| if (contentProposals == null) { |
| contentProposals = new IContentProposal[proposals.length]; |
| for (int i = 0; i < proposals.length; i++) { |
| contentProposals[i] = makeContentProposal(proposals[i]); |
| } |
| } |
| return contentProposals; |
| } |
| |
| /** |
| * Set the Strings to be used as content proposals. |
| * |
| * @param items |
| * the array of Strings to be used as proposals. |
| */ |
| public void setProposals(String[] items) { |
| this.proposals = items; |
| contentProposals = null; |
| } |
| |
| /** |
| * Set the boolean that controls whether proposals are filtered according to |
| * the current field content. |
| * |
| * @param filterProposals |
| * <code>true</code> if the proposals should be filtered to |
| * show only those that match the current contents of the field, |
| * and <code>false</code> if the proposals should remain the |
| * same, ignoring the field content. |
| * @since 3.3 |
| */ |
| public void setFiltering(boolean filterProposals) { |
| this.filterProposals = filterProposals; |
| // Clear any cached proposals. |
| contentProposals = null; |
| } |
| |
| /* |
| * Make an IContentProposal for showing the specified String. |
| */ |
| private IContentProposal makeContentProposal(final String proposal) { |
| return new IContentProposal() { |
| public String getContent() { |
| return proposal; |
| } |
| |
| public String getDescription() { |
| return null; |
| } |
| |
| public String getLabel() { |
| return null; |
| } |
| |
| public int getCursorPosition() { |
| return proposal.length(); |
| } |
| }; |
| } |
| } |