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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.ltk.core.refactoring.Change;
20 import org.eclipse.ltk.core.refactoring.TextChange;
21 import org.eclipse.ltk.core.refactoring.TextEditChangeGroup;
22 import org.eclipse.ltk.ui.refactoring.IChangePreviewViewer;
23
24 import org.eclipse.jface.text.IRegion;
25 import org.eclipse.jface.util.Assert;
26
27 public abstract class PseudoLanguageChangeElement extends ChangeElement {
28
29 private List fChildren;
30
31 public PseudoLanguageChangeElement(ChangeElement parent) {
32 super(parent);
33 }
34
35 public Change getChange() {
36 return null;
37 }
38
39 public ChangePreviewViewerDescriptor getChangePreviewViewerDescriptor() throws CoreException {
40 DefaultChangeElement element= getDefaultChangeElement();
41 if (element == null)
42 return null;
43 return element.getChangePreviewViewerDescriptor();
44 }
45
46 public void feedInput(IChangePreviewViewer viewer) throws CoreException {
47 DefaultChangeElement element= getDefaultChangeElement();
48 if (element != null) {
49 Change change= element.getChange();
50 if (change instanceof TextChange) {
51 List edits= collectTextEditChanges();
52 viewer.setInput(TextChangePreviewViewer.createInput(change,
53 (TextEditChangeGroup[])edits.toArray(new TextEditChangeGroup[edits.size()]),
54 getTextRange()));
55 }
56 } else {
57 viewer.setInput(null);
58 }
59 }
60
61 public void setEnabled(boolean enabled) {
62 for (Iterator iter= fChildren.iterator(); iter.hasNext();) {
63 ChangeElement element= (ChangeElement)iter.next();
64 element.setEnabled(enabled);
65 }
66 }
67
68 public void setEnabledShallow(boolean enabled) {
69 }
71
72 public int getActive() {
73 Assert.isTrue(fChildren.size() > 0);
74 int result= ((ChangeElement)fChildren.get(0)).getActive();
75 for (int i= 1; i < fChildren.size(); i++) {
76 ChangeElement element= (ChangeElement)fChildren.get(i);
77 result= ACTIVATION_TABLE[element.getActive()][result];
78 if (result == PARTLY_ACTIVE)
79 break;
80 }
81 return result;
82 }
83
84
87 public ChangeElement[] getChildren() {
88 if (fChildren == null)
89 return EMPTY_CHILDREN;
90 return (ChangeElement[]) fChildren.toArray(new ChangeElement[fChildren.size()]);
91 }
92
93
99 public void addChild(TextEditChangeElement child) {
100 doAddChild(child);
101 }
102
103
109 public void addChild(PseudoLanguageChangeElement child) {
110 doAddChild(child);
111 }
112
113 private void doAddChild(ChangeElement child) {
114 if (fChildren == null)
115 fChildren= new ArrayList (2);
116 fChildren.add(child);
117 }
118
119 private DefaultChangeElement getDefaultChangeElement() {
120 ChangeElement element= getParent();
121 while(!(element instanceof DefaultChangeElement) && element != null) {
122 element= element.getParent();
123 }
124 return (DefaultChangeElement)element;
125 }
126
127 private List collectTextEditChanges() {
128 List result= new ArrayList (10);
129 ChangeElement[] children= getChildren();
130 for (int i= 0; i < children.length; i++) {
131 ChangeElement child= children[i];
132 if (child instanceof TextEditChangeElement) {
133 result.add(((TextEditChangeElement)child).getTextEditChange());
134 } else if (child instanceof PseudoLanguageChangeElement) {
135 result.addAll(((PseudoLanguageChangeElement)child).collectTextEditChanges());
136 }
137 }
138 return result;
139 }
140
141
147 public abstract IRegion getTextRange() throws CoreException;
148 }
149 |
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