| /* |
| * Copyright 2000-2014 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.postfix.templates; |
| |
| import com.intellij.codeInsight.guess.GuessManager; |
| import com.intellij.codeInsight.lookup.LookupElement; |
| import com.intellij.codeInsight.lookup.PsiTypeLookupItem; |
| import com.intellij.codeInsight.template.*; |
| import com.intellij.codeInsight.template.postfix.util.JavaPostfixTemplatesUtils; |
| import com.intellij.openapi.editor.Document; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.editor.RangeMarker; |
| import com.intellij.openapi.editor.ScrollType; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.TextRange; |
| import com.intellij.psi.*; |
| import com.intellij.refactoring.introduceField.ElementToWorkOn; |
| import com.intellij.util.IncorrectOperationException; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.LinkedHashSet; |
| import java.util.Set; |
| |
| public class InstanceofExpressionPostfixTemplate extends PostfixTemplate { |
| |
| public InstanceofExpressionPostfixTemplate() { |
| this("instanceof"); |
| } |
| |
| public InstanceofExpressionPostfixTemplate(String alias) { |
| super(alias, "expr instanceof Type ? ((Type) expr). : null"); |
| } |
| |
| @Override |
| public boolean isApplicable(@NotNull PsiElement context, @NotNull Document copyDocument, int newOffset) { |
| return JavaPostfixTemplatesUtils.isNotPrimitiveTypeExpression(JavaPostfixTemplatesUtils.getTopmostExpression(context)); |
| } |
| |
| @Override |
| public void expand(@NotNull PsiElement context, @NotNull Editor editor) { |
| PsiExpression expression = JavaPostfixTemplatesUtils.getTopmostExpression(context); |
| if (!JavaPostfixTemplatesUtils.isNotPrimitiveTypeExpression(expression)) return; |
| surroundExpression(context.getProject(), editor, expression); |
| } |
| |
| private static void surroundExpression(@NotNull Project project, @NotNull Editor editor, @NotNull PsiExpression expr) |
| throws IncorrectOperationException { |
| assert expr.isValid(); |
| PsiType[] types = GuessManager.getInstance(project).guessTypeToCast(expr); |
| final boolean parenthesesNeeded = expr instanceof PsiPolyadicExpression || |
| expr instanceof PsiConditionalExpression || |
| expr instanceof PsiAssignmentExpression; |
| String exprText = parenthesesNeeded ? "(" + expr.getText() + ")" : expr.getText(); |
| Template template = generateTemplate(project, exprText, types); |
| TextRange range; |
| if (expr.isPhysical()) { |
| range = expr.getTextRange(); |
| } |
| else { |
| RangeMarker rangeMarker = expr.getUserData(ElementToWorkOn.TEXT_RANGE); |
| if (rangeMarker == null) { |
| PostfixTemplatesUtils.showErrorHint(project, editor); |
| return; |
| } |
| range = new TextRange(rangeMarker.getStartOffset(), rangeMarker.getEndOffset()); |
| } |
| editor.getDocument().deleteString(range.getStartOffset(), range.getEndOffset()); |
| editor.getCaretModel().moveToOffset(range.getStartOffset()); |
| editor.getScrollingModel().scrollToCaret(ScrollType.RELATIVE); |
| TemplateManager.getInstance(project).startTemplate(editor, template); |
| } |
| |
| private static Template generateTemplate(Project project, String exprText, PsiType[] suggestedTypes) { |
| TemplateManager templateManager = TemplateManager.getInstance(project); |
| Template template = templateManager.createTemplate("", ""); |
| template.setToReformat(true); |
| |
| Set<LookupElement> itemSet = new LinkedHashSet<LookupElement>(); |
| for (PsiType type : suggestedTypes) { |
| itemSet.add(PsiTypeLookupItem.createLookupItem(type, null)); |
| } |
| final LookupElement[] lookupItems = itemSet.toArray(new LookupElement[itemSet.size()]); |
| final Result result = suggestedTypes.length > 0 ? new PsiTypeResult(suggestedTypes[0], project) : null; |
| |
| Expression expr = new Expression() { |
| @Override |
| public LookupElement[] calculateLookupItems(ExpressionContext context) { |
| return lookupItems.length > 1 ? lookupItems : null; |
| } |
| |
| @Override |
| public Result calculateResult(ExpressionContext context) { |
| return result; |
| } |
| |
| @Override |
| public Result calculateQuickResult(ExpressionContext context) { |
| return null; |
| } |
| }; |
| |
| template.addTextSegment(exprText); |
| template.addTextSegment(" instanceof "); |
| String type = "type"; |
| template.addVariable(type, expr, expr, true); |
| template.addTextSegment(" ? (("); |
| template.addVariableSegment(type); |
| template.addTextSegment(")" + exprText + ")"); |
| template.addEndVariable(); |
| template.addTextSegment(" : null;"); |
| |
| return template; |
| } |
| } |