| |
| /* |
| * Copyright 2000-2009 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.codeInsight.template.macro; |
| |
| import com.intellij.codeInsight.CodeInsightBundle; |
| import com.intellij.codeInsight.guess.GuessManager; |
| import com.intellij.codeInsight.lookup.LookupElement; |
| import com.intellij.codeInsight.template.*; |
| import com.intellij.codeInsight.template.impl.JavaTemplateUtil; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.TextRange; |
| import com.intellij.psi.PsiExpression; |
| import com.intellij.psi.PsiType; |
| import com.intellij.psi.PsiWildcardType; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.LinkedHashSet; |
| import java.util.Set; |
| |
| public class GuessElementTypeMacro extends Macro { |
| @Override |
| public String getName() { |
| return "guessElementType"; |
| } |
| |
| @Override |
| public String getPresentableName() { |
| return CodeInsightBundle.message("macro.guess.element.type.of.container"); |
| } |
| |
| @Override |
| @NotNull |
| public String getDefaultValue() { |
| return "A"; |
| } |
| |
| @Override |
| public Result calculateResult(@NotNull Expression[] params, final ExpressionContext context) { |
| PsiType[] types = guessTypes(params, context); |
| if (types == null || types.length == 0) return null; |
| return new PsiTypeResult(types[0], context.getProject()); |
| } |
| |
| @Override |
| public LookupElement[] calculateLookupItems(@NotNull Expression[] params, ExpressionContext context) { |
| PsiType[] types = guessTypes(params, context); |
| if (types == null || types.length < 2) return null; |
| Set<LookupElement> set = new LinkedHashSet<LookupElement>(); |
| for (PsiType type : types) { |
| JavaTemplateUtil.addTypeLookupItem(set, type); |
| } |
| return set.toArray(new LookupElement[set.size()]); |
| } |
| |
| @Nullable |
| private static PsiType[] guessTypes(Expression[] params, ExpressionContext context) { |
| if (params.length != 1) return null; |
| final Result result = params[0].calculateResult(context); |
| if (result == null) return null; |
| |
| Project project = context.getProject(); |
| |
| PsiExpression expr = MacroUtil.resultToPsiExpression(result, context); |
| if (expr == null) return null; |
| PsiType[] types = GuessManager.getInstance(project).guessContainerElementType(expr, new TextRange(context.getTemplateStartOffset(), context.getTemplateEndOffset())); |
| for (int i = 0; i < types.length; i++) { |
| PsiType type = types[i]; |
| if (type instanceof PsiWildcardType) { |
| if (((PsiWildcardType)type).isExtends()) { |
| types[i] = ((PsiWildcardType)type).getBound(); |
| } else { |
| types[i] = PsiType.getJavaLangObject(expr.getManager(), expr.getResolveScope()); |
| } |
| } |
| } |
| return types; |
| } |
| |
| @Override |
| public boolean isAcceptableInContext(TemplateContextType context) { |
| return context instanceof JavaCodeContextType; |
| } |
| |
| } |