1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
package com.intellij.codeInsight.lookup;
import com.intellij.codeInsight.AutoPopupController;
import com.intellij.codeInsight.TailType;
import com.intellij.codeInsight.completion.*;
import com.intellij.codeInsight.daemon.impl.analysis.HighlightControlFlowUtil;
import com.intellij.featureStatistics.FeatureUsageTracker;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.RangeMarker;
import com.intellij.openapi.util.registry.Registry;
import com.intellij.psi.*;
import com.intellij.psi.codeStyle.JavaCodeStyleManager;
import com.intellij.psi.controlFlow.ControlFlowUtil;
import com.intellij.psi.impl.source.PostprocessReformattingAspect;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.util.PsiUtil;
import com.intellij.util.containers.HashMap;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Collection;
/**
* @author peter
*/
public class VariableLookupItem extends LookupItem<PsiVariable> implements TypedLookupItem, StaticallyImportable {
@Nullable private final MemberLookupHelper myHelper;
public VariableLookupItem(PsiVariable object) {
super(object, object.getName());
myHelper = null;
}
public VariableLookupItem(PsiField field, boolean shouldImport) {
super(field, field.getName());
myHelper = new MemberLookupHelper(field, field.getContainingClass(), shouldImport, false);
if (!shouldImport) {
forceQualify();
}
}
@Override
public PsiType getType() {
return getSubstitutor().substitute(getObject().getType());
}
@NotNull
public PsiSubstitutor getSubstitutor() {
final PsiSubstitutor substitutor = (PsiSubstitutor)getAttribute(LookupItem.SUBSTITUTOR);
return substitutor == null ? PsiSubstitutor.EMPTY : substitutor;
}
public void setSubstitutor(@NotNull PsiSubstitutor substitutor) {
setAttribute(SUBSTITUTOR, substitutor);
}
@Override
public void setShouldBeImported(boolean shouldImportStatic) {
assert myHelper != null;
myHelper.setShouldBeImported(shouldImportStatic);
}
@Override
public boolean canBeImported() {
return myHelper != null;
}
@Override
public boolean willBeImported() {
return myHelper != null && myHelper.willBeImported();
}
@Override
public void renderElement(LookupElementPresentation presentation) {
super.renderElement(presentation);
if (myHelper != null) {
myHelper.renderElement(presentation, getAttribute(FORCE_QUALIFY) != null ? Boolean.TRUE : null, getSubstitutor());
}
}
@Override
public LookupItem<PsiVariable> forceQualify() {
PsiVariable var = getObject();
if (var instanceof PsiField) {
for (String s : JavaCompletionUtil.getAllLookupStrings((PsiField)var)) {
setLookupString(s); //todo set the string that will be inserted
}
}
return super.forceQualify();
}
@Override
public void handleInsert(InsertionContext context) {
PsiVariable variable = getObject();
Document document = context.getDocument();
document.replaceString(context.getStartOffset(), context.getTailOffset(), variable.getName());
context.commitDocument();
if (variable instanceof PsiField) {
if (willBeImported()) {
RangeMarker toDelete = JavaCompletionUtil.insertTemporary(context.getTailOffset(), document, " ");
context.commitDocument();
final PsiReferenceExpression
ref = PsiTreeUtil.findElementOfClassAtOffset(context.getFile(), context.getStartOffset(), PsiReferenceExpression.class, false);
if (ref != null) {
ref.bindToElementViaStaticImport(((PsiField)variable).getContainingClass());
PostprocessReformattingAspect.getInstance(ref.getProject()).doPostponedFormatting();
}
if (toDelete.isValid()) {
document.deleteString(toDelete.getStartOffset(), toDelete.getEndOffset());
}
context.commitDocument();
}
else if (shouldQualify((PsiField)variable, context)) {
qualifyFieldReference(context, (PsiField)variable);
}
}
PsiReferenceExpression ref = PsiTreeUtil.findElementOfClassAtOffset(context.getFile(), context.getTailOffset() - 1, PsiReferenceExpression.class, false);
if (ref != null) {
JavaCodeStyleManager.getInstance(context.getProject()).shortenClassReferences(ref);
}
ref = PsiTreeUtil.findElementOfClassAtOffset(context.getFile(), context.getTailOffset() - 1, PsiReferenceExpression.class, false);
PsiElement target = ref == null ? null : ref.resolve();
if (target instanceof PsiLocalVariable || target instanceof PsiParameter) {
makeFinalIfNeeded(context, (PsiVariable)target);
}
final char completionChar = context.getCompletionChar();
if (completionChar == '=') {
context.setAddCompletionChar(false);
TailType.EQ.processTail(context.getEditor(), context.getTailOffset());
}
else if (completionChar == ',' && getAttribute(LookupItem.TAIL_TYPE_ATTR) != TailType.UNKNOWN) {
context.setAddCompletionChar(false);
TailType.COMMA.processTail(context.getEditor(), context.getTailOffset());
AutoPopupController.getInstance(context.getProject()).autoPopupParameterInfo(context.getEditor(), null);
}
else if (completionChar == ':') {
context.setAddCompletionChar(false);
TailType.COND_EXPR_COLON.processTail(context.getEditor(), context.getTailOffset());
}
else if (completionChar == '.') {
AutoPopupController.getInstance(context.getProject()).autoPopupMemberLookup(context.getEditor(), null);
}
else if (completionChar == '!' && PsiType.BOOLEAN.isAssignableFrom(variable.getType())) {
context.setAddCompletionChar(false);
if (ref != null) {
FeatureUsageTracker.getInstance().triggerFeatureUsed(CodeCompletionFeatures.EXCLAMATION_FINISH);
document.insertString(ref.getTextRange().getStartOffset(), "!");
}
}
}
public static void makeFinalIfNeeded(@NotNull InsertionContext context, @NotNull PsiVariable variable) {
PsiElement place = context.getFile().findElementAt(context.getTailOffset() - 1);
if (!Registry.is("java.completion.make.outer.variables.final") ||
place == null || PsiUtil.isLanguageLevel8OrHigher(place) || JspPsiUtil.isInJspFile(place)) {
return;
}
if (HighlightControlFlowUtil.getInnerClassVariableReferencedFrom(variable, place) != null &&
!HighlightControlFlowUtil.isReassigned(variable, new HashMap<PsiElement, Collection<ControlFlowUtil.VariableInfo>>())) {
PsiUtil.setModifierProperty(variable, PsiModifier.FINAL, true);
}
}
private boolean shouldQualify(PsiField field, InsertionContext context) {
if (myHelper != null && !myHelper.willBeImported()) {
return true;
}
if (getAttribute(FORCE_QUALIFY) != null) {
return true;
}
PsiReference reference = context.getFile().findReferenceAt(context.getStartOffset());
if (reference instanceof PsiReferenceExpression && !((PsiReferenceExpression)reference).isQualified()) {
final PsiVariable target = JavaPsiFacade.getInstance(context.getProject()).getResolveHelper()
.resolveReferencedVariable(field.getName(), (PsiElement)reference);
return !field.getManager().areElementsEquivalent(target, CompletionUtil.getOriginalOrSelf(field));
}
return false;
}
private static void qualifyFieldReference(InsertionContext context, PsiField field) {
context.commitDocument();
PsiFile file = context.getFile();
final PsiReference reference = file.findReferenceAt(context.getStartOffset());
if (reference instanceof PsiJavaCodeReferenceElement && ((PsiJavaCodeReferenceElement)reference).isQualified()) {
return;
}
PsiClass containingClass = field.getContainingClass();
if (containingClass != null && containingClass.getName() != null) {
OffsetKey oldStart = context.trackOffset(context.getStartOffset(), true);
JavaCompletionUtil.insertClassReference(containingClass, file, context.getStartOffset());
context.getDocument().insertString(context.getOffsetMap().getOffset(oldStart), ".");
PsiDocumentManager.getInstance(context.getProject()).commitDocument(context.getDocument());
}
}
}
|
