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1 /*******************************************************************************
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2 * Copyright (c) 2005, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.fieldassist.SimpleContentProposalProvider;
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14
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15 import dwtx.jface.fieldassist.IContentProposalProvider;
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16 import dwtx.jface.fieldassist.IContentProposal;
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17
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18 import tango.util.collection.ArraySeq;
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19
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20 import dwt.dwthelper.utils;
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21
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22 /**
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23 * SimpleContentProposalProvider is a class designed to map a static list of
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24 * Strings to content proposals.
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25 *
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26 * @see IContentProposalProvider
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27 * @since 3.2
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28 *
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29 */
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30 public class SimpleContentProposalProvider : IContentProposalProvider {
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31
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32 /*
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33 * The proposals provided.
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34 */
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35 private String[] proposals;
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36
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37 /*
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38 * The proposals mapped to IContentProposal. Cached for speed in the case
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39 * where filtering is not used.
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40 */
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41 private IContentProposal[] contentProposals;
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42
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43 /*
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44 * bool that tracks whether filtering is used.
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45 */
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46 private bool filterProposals = false;
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47
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48 /**
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49 * Construct a SimpleContentProposalProvider whose content proposals are
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50 * always the specified array of Objects.
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51 *
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52 * @param proposals
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53 * the array of Strings to be returned whenever proposals are
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54 * requested.
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55 */
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56 public this(String[] proposals) {
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57 //super();
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58 this.proposals = proposals;
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59 }
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60
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61 /**
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62 * Return an array of Objects representing the valid content proposals for a
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63 * field. Ignore the current contents of the field.
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64 *
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65 * @param contents
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66 * the current contents of the field (only consulted if filtering
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67 * is set to <code>true</code>)
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68 * @param position
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69 * the current cursor position within the field (ignored)
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70 * @return the array of Objects that represent valid proposals for the field
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71 * given its current content.
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72 */
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73 public IContentProposal[] getProposals(String contents, int position) {
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74 if (filterProposals) {
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75 auto list = new ArraySeq!(IContentProposal);
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76 for (int i = 0; i < proposals.length; i++) {
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77 if (proposals[i].length > contents.length
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78 && proposals[i].substring(0, contents.length)
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79 .equalsIgnoreCase(contents)) {
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80 list.append(makeContentProposal(proposals[i]));
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81 }
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82 }
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83 return list.toArray();
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84 }
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85 if (contentProposals is null) {
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86 contentProposals = new IContentProposal[proposals.length];
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87 for (int i = 0; i < proposals.length; i++) {
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88 contentProposals[i] = makeContentProposal(proposals[i]);
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89 }
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90 }
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91 return contentProposals;
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92 }
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93
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94 /**
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95 * Set the Strings to be used as content proposals.
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96 *
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97 * @param items
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98 * the array of Strings to be used as proposals.
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99 */
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100 public void setProposals(String[] items) {
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101 this.proposals = items;
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102 contentProposals = null;
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103 }
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104
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105 /**
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106 * Set the bool that controls whether proposals are filtered according to
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107 * the current field content.
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108 *
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109 * @param filterProposals
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110 * <code>true</code> if the proposals should be filtered to
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111 * show only those that match the current contents of the field,
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112 * and <code>false</code> if the proposals should remain the
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113 * same, ignoring the field content.
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114 * @since 3.3
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115 */
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116 public void setFiltering(bool filterProposals) {
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117 this.filterProposals = filterProposals;
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118 // Clear any cached proposals.
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119 contentProposals = null;
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120 }
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121
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122 /*
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123 * Make an IContentProposal for showing the specified String.
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124 */
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125 private IContentProposal makeContentProposal( String proposal) {
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126 return new class IContentProposal {
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127 String proposal_;
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128 this(){proposal_=proposal;}
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129 public String getContent() {
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130 return proposal_;
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131 }
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132
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133 public String getDescription() {
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134 return null;
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135 }
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136
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137 public String getLabel() {
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138 return null;
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139 }
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140
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141 public int getCursorPosition() {
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142 return proposal_.length;
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143 }
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144 };
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145 }
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146 }
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