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1
11 package org.eclipse.ltk.internal.ui.refactoring;
12
13 import java.util.ArrayList  ;
14 import java.util.Iterator ;
15 import java.util.List ;
16
17 import org.eclipse.core.runtime.Assert;
18 import org.eclipse.core.runtime.CoreException;
19
20 import org.eclipse.ltk.core.refactoring.Change;
21 import org.eclipse.ltk.core.refactoring.GroupCategorySet;
22 import org.eclipse.ltk.core.refactoring.TextEditBasedChange;
23 import org.eclipse.ltk.core.refactoring.TextEditBasedChangeGroup;
24
25 import org.eclipse.jface.text.IRegion;
26
27 import org.eclipse.ltk.ui.refactoring.IChangePreviewViewer;
28 import org.eclipse.ltk.ui.refactoring.TextEditChangeNode;
29 import org.eclipse.ltk.ui.refactoring.TextEditChangeNode.ChildNode;
30
31 public abstract class InternalLanguageElementNode extends TextEditChangeNode.ChildNode {
32
33 private List fChildren;
34 private GroupCategorySet fGroupCategories;
35
36 protected InternalLanguageElementNode(PreviewNode parent) {
37 super(parent);
38 }
39
40 ChangePreviewViewerDescriptor getChangePreviewViewerDescriptor() throws CoreException {
41 InternalTextEditChangeNode element= getTextEditChangeNode();
42 if (element == null)
43 return null;
44 return element.getChangePreviewViewerDescriptor();
45 }
46
47 void feedInput(IChangePreviewViewer viewer, List categories) throws CoreException {
48 InternalTextEditChangeNode element= getTextEditChangeNode();
49 if (element != null) {
50 Change change= element.getChange();
51 if (change instanceof TextEditBasedChange) {
52 List groups= collectTextEditBasedChangeGroups(categories);
53 viewer.setInput(TextEditChangePreviewViewer.createInput(change,
54 (TextEditBasedChangeGroup[])groups.toArray(new TextEditBasedChangeGroup[groups.size()]),
55 getTextRange()));
56 }
57 } else {
58 viewer.setInput(null);
59 }
60 }
61
62 void setEnabled(boolean enabled) {
63 for (Iterator iter= fChildren.iterator(); iter.hasNext();) {
64 PreviewNode element= (PreviewNode)iter.next();
65 element.setEnabled(enabled);
66 }
67 }
68
69 void setEnabledShallow(boolean enabled) {
70 }
72
73 int getActive() {
74 Assert.isTrue(fChildren.size() > 0);
75 int result= ((PreviewNode)fChildren.get(0)).getActive();
76 for (int i= 1; i < fChildren.size(); i++) {
77 PreviewNode element= (PreviewNode)fChildren.get(i);
78 result= PreviewNode.ACTIVATION_TABLE[element.getActive()][result];
79 if (result == PreviewNode.PARTLY_ACTIVE)
80 break;
81 }
82 return result;
83 }
84
85 PreviewNode[] getChildren() {
86 if (fChildren == null)
87 return PreviewNode.EMPTY_CHILDREN;
88 return (PreviewNode[]) fChildren.toArray(new PreviewNode[fChildren.size()]);
89 }
90
91 boolean hasOneGroupCategory(List categories) {
92 if (fChildren == null)
93 return false;
94 return getGroupCategorySet().containsOneCategory(categories);
95 }
96
97 boolean hasDerived() {
98 if (fChildren == null)
99 return false;
100 for (Iterator iter= fChildren.iterator(); iter.hasNext();) {
101 PreviewNode node= (PreviewNode)iter.next();
102 if (node.hasDerived())
103 return true;
104 }
105 return false;
106 }
107
108 private GroupCategorySet getGroupCategorySet() {
109 if (fGroupCategories == null) {
110 fGroupCategories= GroupCategorySet.NONE;
111 for (Iterator iter= fChildren.iterator(); iter.hasNext();) {
112 PreviewNode node= (PreviewNode)iter.next();
113 GroupCategorySet other= null;
114 if (node instanceof TextEditGroupNode) {
115 other= ((TextEditGroupNode)node).getGroupCategorySet();
116 } else if (node instanceof InternalLanguageElementNode) {
117 other= ((InternalLanguageElementNode)node).getGroupCategorySet();
118 } else {
119 Assert.isTrue(false, "Shouldn't happen"); }
121 fGroupCategories= GroupCategorySet.union(fGroupCategories, other);
122 }
123 }
124 return fGroupCategories;
125 }
126
127 protected void internalAddChild(ChildNode child) {
128 if (fChildren == null)
129 fChildren= new ArrayList (2);
130 fChildren.add(child);
131 }
132
133 private List collectTextEditBasedChangeGroups(List categories) {
134 List result= new ArrayList (10);
135 PreviewNode[] children= getChildren();
136 for (int i= 0; i < children.length; i++) {
137 PreviewNode child= children[i];
138 if (child instanceof TextEditGroupNode) {
139 TextEditBasedChangeGroup changeGroup= ((TextEditGroupNode)child).getChangeGroup();
140 if (categories == null || changeGroup.getGroupCategorySet().containsOneCategory(categories))
141 result.add(changeGroup);
142 } else if (child instanceof InternalLanguageElementNode) {
143 result.addAll(((InternalLanguageElementNode)child).collectTextEditBasedChangeGroups(categories));
144 }
145 }
146 return result;
147 }
148
149
155 public abstract IRegion getTextRange() throws CoreException;
156 }
157 |
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