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1 /*******************************************************************************
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2 * Copyright (c) 2003, 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.preference.PreferenceContentProvider;
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14
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15 import dwtx.jface.preference.IPreferenceNode;
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16 import dwtx.jface.preference.PreferenceManager;
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17
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18 import dwtx.jface.viewers.ITreeContentProvider;
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19 import dwtx.jface.viewers.Viewer;
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20
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21 import dwt.dwthelper.utils;
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22
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23 /**
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24 * Provides a tree model for <code>PreferenceManager</code> content.
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25 *
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26 * @since 3.0
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27 */
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28 public class PreferenceContentProvider : ITreeContentProvider {
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29
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30 private PreferenceManager manager;
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31
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32 /* (non-Javadoc)
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33 * @see dwtx.jface.viewers.IContentProvider#dispose()
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34 */
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35 public void dispose() {
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36 manager = null;
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37 }
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38
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39 /**
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40 * Find the parent of the provided node. Will search recursivly through the
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41 * preference tree.
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42 *
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43 * @param parent the possible parent node.
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44 * @param target the target child node.
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45 * @return the parent node of the child node.
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46 */
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47 private IPreferenceNode findParent(IPreferenceNode parent,
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48 IPreferenceNode target) {
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49 if (parent.getId().equals(target.getId())) {
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50 return null;
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51 }
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52
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53 IPreferenceNode found = parent.findSubNode(target.getId());
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54 if (found !is null) {
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55 return parent;
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56 }
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57
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58 IPreferenceNode[] children = parent.getSubNodes();
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59
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60 for (int i = 0; i < children.length; i++) {
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61 found = findParent(children[i], target);
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62 if (found !is null) {
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63 return found;
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64 }
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65 }
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66
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67 return null;
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68 }
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69
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70 /*
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71 * (non-Javadoc)
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72 * @see dwtx.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
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73 */
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74 public Object[] getChildren(Object parentElement) {//must be an instance of <code>IPreferenceNode</code>.
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75 return arraycast!(Object)((cast(IPreferenceNode) parentElement).getSubNodes());
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76 }
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77
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78 /*
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79 * (non-Javadoc)
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80 * @see dwtx.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
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81 */
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82 public Object[] getElements(Object inputElement) {// must be an instance of <code>PreferenceManager</code>.
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83 return getChildren(cast(Object)(cast(PreferenceManager) inputElement).getRoot_package());
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84 }
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85
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86 /*
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87 * (non-Javadoc)
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88 * @see dwtx.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
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89 */
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90 public Object getParent(Object element) {//must be an instance of <code>IPreferenceNode</code>.
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91 IPreferenceNode targetNode = cast(IPreferenceNode) element;
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92 IPreferenceNode root = manager.getRoot_package();
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93 return cast(Object)findParent(root, targetNode);
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94 }
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95
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96 /* (non-Javadoc)
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97 * @see dwtx.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
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98 */
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99 public bool hasChildren(Object element) {
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100 return getChildren(element).length > 0;
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101 }
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102
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103 /* (non-Javadoc)
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104 * @see dwtx.jface.viewers.IContentProvider#inputChanged(dwtx.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
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105 */
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106 public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
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107 manager = cast(PreferenceManager) newInput;
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108 }
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109 /**
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110 * Set the manager for the preferences.
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111 * @param manager The manager to set.
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112 *
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113 * @since 3.1
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114 */
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115 protected void setManager(PreferenceManager manager) {
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116 this.manager = manager;
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117 }
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118 }
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