| /* |
| * Copyright 2000-2013 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.jetbrains.python.codeInsight.intentions; |
| |
| import com.intellij.codeInsight.CodeInsightUtilCore; |
| import com.intellij.codeInsight.controlflow.ControlFlow; |
| import com.intellij.codeInsight.controlflow.Instruction; |
| import com.intellij.codeInsight.intention.impl.BaseIntentionAction; |
| import com.intellij.codeInsight.lookup.LookupElement; |
| import com.intellij.codeInsight.template.*; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.util.IncorrectOperationException; |
| import com.jetbrains.python.PyBundle; |
| import com.jetbrains.python.codeInsight.codeFragment.PyCodeFragmentUtil; |
| import com.jetbrains.python.codeInsight.controlflow.ControlFlowCache; |
| import com.jetbrains.python.psi.*; |
| import com.jetbrains.python.psi.impl.PyFunctionBuilder; |
| import com.jetbrains.python.refactoring.introduce.IntroduceValidator; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * User: catherine |
| * Intention to convert lambda to function |
| */ |
| public class PyConvertLambdaToFunctionIntention extends BaseIntentionAction { |
| |
| @NotNull |
| public String getFamilyName() { |
| return PyBundle.message("INTN.convert.lambda.to.function"); |
| } |
| |
| @NotNull |
| public String getText() { |
| return PyBundle.message("INTN.convert.lambda.to.function"); |
| } |
| |
| public boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) { |
| if (!(file instanceof PyFile)) { |
| return false; |
| } |
| |
| PyLambdaExpression lambdaExpression = PsiTreeUtil.getParentOfType(file.findElementAt(editor.getCaretModel().getOffset()), PyLambdaExpression.class); |
| if (lambdaExpression != null) { |
| if (lambdaExpression.getBody() != null) { |
| final ControlFlow flow = ControlFlowCache.getControlFlow(lambdaExpression); |
| final List<Instruction> graph = Arrays.asList(flow.getInstructions()); |
| final List<PsiElement> elements = PyCodeFragmentUtil.getInputElements(graph, graph); |
| if (elements.size() > 0) return false; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public void invoke(@NotNull Project project, Editor editor, PsiFile file) throws IncorrectOperationException { |
| PyLambdaExpression lambdaExpression = PsiTreeUtil.getParentOfType(file.findElementAt(editor.getCaretModel().getOffset()), PyLambdaExpression.class); |
| if (lambdaExpression != null) { |
| String name = "function"; |
| while (IntroduceValidator.isDefinedInScope(name, lambdaExpression)) { |
| name += "1"; |
| } |
| |
| PsiElement parent = lambdaExpression.getParent(); |
| if (parent instanceof PyAssignmentStatement) { |
| name = ((PyAssignmentStatement)parent).getLeftHandSideExpression().getText(); |
| } |
| |
| if (name.isEmpty()) return; |
| PyExpression body = lambdaExpression.getBody(); |
| PyFunctionBuilder functionBuilder = new PyFunctionBuilder(name); |
| for (PyParameter param : lambdaExpression.getParameterList().getParameters()) { |
| functionBuilder.parameter(param.getText()); |
| } |
| functionBuilder.statement("return " + body.getText()); |
| PyFunction function = functionBuilder.buildFunction(project, LanguageLevel.getDefault()); |
| |
| final PyStatement statement = PsiTreeUtil.getParentOfType(lambdaExpression, |
| PyStatement.class); |
| if (statement != null) { |
| final PsiElement statementParent = statement.getParent(); |
| if (statementParent != null) |
| function = (PyFunction)statementParent.addBefore(function, statement); |
| } |
| |
| function = CodeInsightUtilCore |
| .forcePsiPostprocessAndRestoreElement(function); |
| |
| if (parent instanceof PyAssignmentStatement) { |
| parent.delete(); |
| } |
| else { |
| PsiFile parentScope = lambdaExpression.getContainingFile(); |
| final TemplateBuilder builder = TemplateBuilderFactory.getInstance().createTemplateBuilder(parentScope); |
| PsiElement functionName = function.getNameIdentifier(); |
| functionName = CodeInsightUtilCore.forcePsiPostprocessAndRestoreElement(functionName); |
| lambdaExpression = CodeInsightUtilCore.forcePsiPostprocessAndRestoreElement(lambdaExpression); |
| |
| ReferenceNameExpression refExpr = new ReferenceNameExpression(name); |
| |
| ((TemplateBuilderImpl)builder).replaceElement(lambdaExpression, name, refExpr, true); |
| ((TemplateBuilderImpl)builder).replaceElement(functionName, name, name, false); |
| |
| int textOffSet = functionName.getTextOffset(); |
| editor.getCaretModel().moveToOffset(parentScope.getTextRange().getStartOffset()); |
| |
| Template template = ((TemplateBuilderImpl)builder).buildInlineTemplate(); |
| TemplateManager.getInstance(project).startTemplate(editor, template); |
| editor.getCaretModel().moveToOffset(textOffSet); |
| } |
| } |
| } |
| private class ReferenceNameExpression extends Expression { |
| ReferenceNameExpression(String oldReferenceName) { |
| myOldReferenceName = oldReferenceName; |
| } |
| |
| private final String myOldReferenceName; |
| |
| public Result calculateResult(ExpressionContext context) { |
| return new TextResult(myOldReferenceName); |
| } |
| |
| public Result calculateQuickResult(ExpressionContext context) { |
| return null; |
| } |
| |
| @Override |
| public LookupElement[] calculateLookupItems(ExpressionContext context) { |
| return null; |
| } |
| } |
| } |