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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.CoreException;
18
19 import org.eclipse.jdt.core.IJavaElement;
20 import org.eclipse.jdt.core.ISourceRange;
21 import org.eclipse.jdt.core.ISourceReference;
22
23 import org.eclipse.jface.text.IRegion;
24 import org.eclipse.jface.text.Region;
25 import org.eclipse.jface.util.Assert;
26
27 import org.eclipse.ltk.core.refactoring.Change;
28 import org.eclipse.ltk.core.refactoring.TextChange;
29 import org.eclipse.ltk.core.refactoring.TextEditChangeGroup;
30 import org.eclipse.ltk.ui.refactoring.IChangePreviewViewer;
31
32
36 class PseudoJavaChangeElement extends ChangeElement {
37
38 private IJavaElement fJavaElement;
39 private List fChildren;
40
41 public PseudoJavaChangeElement(ChangeElement parent, IJavaElement element) {
42 super(parent);
43 fJavaElement= element;
44 Assert.isNotNull(fJavaElement);
45 }
46
47
52 public IJavaElement getJavaElement() {
53 return fJavaElement;
54 }
55
56 public Change getChange() {
57 return null;
58 }
59
60 public ChangePreviewViewerDescriptor getChangePreviewViewerDescriptor() throws CoreException {
61 DefaultChangeElement element= getDefaultChangeElement();
62 if (element == null)
63 return null;
64 return element.getChangePreviewViewerDescriptor();
65 }
66
67 public void feedInput(IChangePreviewViewer viewer) throws CoreException {
68 DefaultChangeElement element= getDefaultChangeElement();
69 if (element != null) {
70 Change change= element.getChange();
71 if (change instanceof TextChange) {
72 List edits= collectTextEditChanges();
73 viewer.setInput(TextChangePreviewViewer.createInput(change,
74 (TextEditChangeGroup[])edits.toArray(new TextEditChangeGroup[edits.size()]),
75 getTextRange()));
76 }
77 } else {
78 viewer.setInput(null);
79 }
80 }
81
82 public void setActive(boolean active) {
83 for (Iterator iter= fChildren.iterator(); iter.hasNext();) {
84 ChangeElement element= (ChangeElement)iter.next();
85 element.setActive(active);
86 }
87 }
88
89 public int getActive() {
90 Assert.isTrue(fChildren.size() > 0);
91 int result= ((ChangeElement)fChildren.get(0)).getActive();
92 for (int i= 1; i < fChildren.size(); i++) {
93 ChangeElement element= (ChangeElement)fChildren.get(i);
94 result= ACTIVATION_TABLE[element.getActive()][result];
95 if (result == PARTLY_ACTIVE)
96 break;
97 }
98 return result;
99 }
100
101
104 public ChangeElement[] getChildren() {
105 if (fChildren == null)
106 return EMPTY_CHILDREN;
107 return (ChangeElement[]) fChildren.toArray(new ChangeElement[fChildren.size()]);
108 }
109
110
116 public void addChild(TextEditChangeElement child) {
117 doAddChild(child);
118 }
119
120
126 public void addChild(PseudoJavaChangeElement child) {
127 doAddChild(child);
128 }
129
130 private void doAddChild(ChangeElement child) {
131 if (fChildren == null)
132 fChildren= new ArrayList (2);
133 fChildren.add(child);
134 }
135
136 private DefaultChangeElement getDefaultChangeElement() {
137 ChangeElement element= getParent();
138 while(!(element instanceof DefaultChangeElement) && element != null) {
139 element= element.getParent();
140 }
141 return (DefaultChangeElement)element;
142 }
143
144 private List collectTextEditChanges() {
145 List result= new ArrayList (10);
146 ChangeElement[] children= getChildren();
147 for (int i= 0; i < children.length; i++) {
148 ChangeElement child= children[i];
149 if (child instanceof TextEditChangeElement) {
150 result.add(((TextEditChangeElement)child).getTextEditChange());
151 } else if (child instanceof PseudoJavaChangeElement) {
152 result.addAll(((PseudoJavaChangeElement)child).collectTextEditChanges());
153 }
154 }
155 return result;
156 }
157
158 public IRegion getTextRange() throws CoreException {
159 ISourceRange range= ((ISourceReference)fJavaElement).getSourceRange();
160 return new Region(range.getOffset(), range.getLength());
161 }
162 }
163
164 |
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