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1
11 package org.eclipse.jdt.internal.ui.text.template.preferences;
12
13 import java.util.ArrayList  ;
14 import java.util.Collections ;
15 import java.util.Comparator ;
16 import java.util.Iterator ;
17 import java.util.List ;
18
19 import org.eclipse.jface.text.ITextViewer;
20 import org.eclipse.jface.text.contentassist.ICompletionProposal;
21 import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
22 import org.eclipse.jface.text.contentassist.IContextInformation;
23 import org.eclipse.jface.text.contentassist.IContextInformationValidator;
24 import org.eclipse.jface.text.templates.TemplateContextType;
25 import org.eclipse.jface.text.templates.TemplateVariableResolver;
26
27
28
29 public class TemplateVariableProcessor implements IContentAssistProcessor {
30
31 private static Comparator fgTemplateVariableProposalComparator= new Comparator () {
32 public int compare(Object arg0, Object arg1) {
33 TemplateVariableProposal proposal0= (TemplateVariableProposal) arg0;
34 TemplateVariableProposal proposal1= (TemplateVariableProposal) arg1;
35
36 return proposal0.getDisplayString().compareTo(proposal1.getDisplayString());
37 }
38
39 public boolean equals(Object arg0) {
40 return false;
41 }
42 };
43
44
45
46 private TemplateContextType fContextType;
47
48
51 public void setContextType(TemplateContextType contextType) {
52 fContextType= contextType;
53 }
54
55
58 public TemplateContextType getContextType() {
59 return fContextType;
60 }
61
62
65 public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int documentOffset) {
66
67 if (fContextType == null)
68 return null;
69
70 List proposals= new ArrayList ();
71
72 String text= viewer.getDocument().get();
73 int start= getStart(text, documentOffset);
74 int end= documentOffset;
75
76 String string= text.substring(start, end);
77 int colon= string.indexOf(':');
78 boolean includeBrace= true;
79 int offset= start;
80 String prefix= string;
81 if (colon != -1) {
82 includeBrace= false;
83 offset= start + colon + 1;
84 prefix= string.substring(colon + 1);
85 } else {
86 int escape= string.indexOf("${"); if (escape != -1) {
88 offset= start + escape + 2;
89 includeBrace= false;
90 prefix= string.substring(escape + 2);
91 }
92 }
93 if (prefix.equals("$")) prefix= "";
96 int length= end - offset;
97
98 for (Iterator iterator= fContextType.resolvers(); iterator.hasNext(); ) {
99 TemplateVariableResolver variable= (TemplateVariableResolver) iterator.next();
100
101 if (variable.getType().startsWith(prefix))
102 proposals.add(new TemplateVariableProposal(variable, offset, length, viewer, includeBrace));
103 }
104
105 Collections.sort(proposals, fgTemplateVariableProposalComparator);
106 return (ICompletionProposal[]) proposals.toArray(new ICompletionProposal[proposals.size()]);
107 }
108
109
110 private int getStart(String string, int end) {
111 int start= end;
112
113 if (start >= 1 && string.charAt(start - 1) == '$')
114 return start - 1;
115
116 while ((start != 0) && Character.isUnicodeIdentifierPart(string.charAt(start - 1)))
117 start--;
118
119 if (start >= 1 && string.charAt(start - 1) == ':') {
120 start--;
121 while ((start != 0) && Character.isUnicodeIdentifierPart(string.charAt(start - 1)))
122 start--;
123 }
124
125 if (start >= 2 && string.charAt(start - 1) == '{' && string.charAt(start - 2) == '$')
126 return start - 2;
127
128 return end;
129 }
130
131
134 public IContextInformation[] computeContextInformation(ITextViewer viewer, int documentOffset) {
135 return null;
136 }
137
138
141 public char[] getCompletionProposalAutoActivationCharacters() {
142 return new char[] {'$'};
143 }
144
145
148 public char[] getContextInformationAutoActivationCharacters() {
149 return null;
150 }
151
152
155 public String getErrorMessage() {
156 return null;
157 }
158
159
162 public IContextInformationValidator getContextInformationValidator() {
163 return null;
164 }
165
166 }
167
168 |
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