| /* |
| * 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.intention.impl; |
| |
| import com.intellij.codeInsight.CodeInsightBundle; |
| import com.intellij.codeInsight.FileModificationService; |
| import com.intellij.lang.java.JavaLanguage; |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.editor.ScrollType; |
| import com.intellij.openapi.fileEditor.ex.IdeDocumentHistory; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.Comparing; |
| import com.intellij.psi.*; |
| import com.intellij.psi.codeStyle.CodeStyleManager; |
| import com.intellij.psi.codeStyle.JavaCodeStyleManager; |
| import com.intellij.psi.codeStyle.SuggestedNameInfo; |
| import com.intellij.psi.codeStyle.VariableKind; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.util.IncorrectOperationException; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| public class AssignFieldFromParameterAction extends BaseIntentionAction { |
| private static final Logger LOG = Logger.getInstance(AssignFieldFromParameterAction.class); |
| |
| @Override |
| public boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) { |
| final PsiParameter myParameter = FieldFromParameterUtils.findParameterAtCursor(file, editor); |
| final PsiType type = FieldFromParameterUtils.getType(myParameter); |
| final PsiClass targetClass = PsiTreeUtil.getParentOfType(myParameter, PsiClass.class); |
| if (!FieldFromParameterUtils.isAvailable(myParameter, type, targetClass)) { |
| return false; |
| } |
| final PsiField field = findFieldToAssign(project, myParameter); |
| if (field == null) return false; |
| if (!field.getLanguage().isKindOf(JavaLanguage.INSTANCE)) return false; |
| setText(CodeInsightBundle.message("intention.assign.field.from.parameter.text", field.getName())); |
| |
| return true; |
| } |
| |
| @Override |
| @NotNull |
| public String getFamilyName() { |
| return CodeInsightBundle.message("intention.assign.field.from.parameter.family"); |
| } |
| |
| @Override |
| public void invoke(@NotNull Project project, Editor editor, PsiFile file) { |
| final PsiParameter myParameter = FieldFromParameterUtils.findParameterAtCursor(file, editor); |
| if (!FileModificationService.getInstance().prepareFileForWrite(myParameter.getContainingFile())) return; |
| |
| IdeDocumentHistory.getInstance(project).includeCurrentPlaceAsChangePlace(); |
| try { |
| PsiField field = findFieldToAssign(project, myParameter); |
| if (field != null) addFieldAssignmentStatement(project, field, myParameter, editor); |
| } |
| catch (IncorrectOperationException e) { |
| LOG.error(e); |
| } |
| } |
| |
| @Nullable |
| private static PsiField findFieldToAssign(@NotNull Project project, |
| @NotNull PsiParameter myParameter) { |
| final JavaCodeStyleManager styleManager = JavaCodeStyleManager.getInstance(project); |
| final String parameterName = myParameter.getName(); |
| final String propertyName = styleManager.variableNameToPropertyName(parameterName, VariableKind.PARAMETER); |
| |
| final PsiMethod method = (PsiMethod)myParameter.getDeclarationScope(); |
| |
| final boolean isMethodStatic = method.hasModifierProperty(PsiModifier.STATIC); |
| final VariableKind kind = isMethodStatic ? VariableKind.STATIC_FIELD : VariableKind.FIELD; |
| final SuggestedNameInfo suggestedNameInfo = styleManager.suggestVariableName(kind, propertyName, null, FieldFromParameterUtils.getSubstitutedType(myParameter)); |
| |
| final String fieldName = suggestedNameInfo.names[0]; |
| |
| PsiClass aClass = method.getContainingClass(); |
| if (aClass == null) return null; |
| PsiField field = aClass.findFieldByName(fieldName, false); |
| if (field == null) return null; |
| if (!field.hasModifierProperty(PsiModifier.STATIC) && isMethodStatic) return null; |
| |
| return field; |
| } |
| |
| public static PsiElement addFieldAssignmentStatement(@NotNull Project project, |
| @NotNull PsiField field, |
| @NotNull PsiParameter parameter, |
| @NotNull Editor editor) throws IncorrectOperationException { |
| final PsiMethod method = (PsiMethod)parameter.getDeclarationScope(); |
| final PsiCodeBlock methodBody = method.getBody(); |
| if (methodBody == null) return null; |
| final PsiElementFactory factory = JavaPsiFacade.getInstance(project).getElementFactory(); |
| final String fieldName = field.getName(); |
| final String parameterName = parameter.getName(); |
| final boolean isMethodStatic = method.hasModifierProperty(PsiModifier.STATIC); |
| final PsiClass targetClass = method.getContainingClass(); |
| if (targetClass == null) return null; |
| |
| String stmtText = fieldName + " = " + parameterName + ";"; |
| if (Comparing.strEqual(fieldName, parameterName) || JavaPsiFacade.getInstance(project).getResolveHelper().resolveReferencedVariable(fieldName, methodBody) != field) { |
| @NonNls String prefix = isMethodStatic ? targetClass.getName() == null ? "" : targetClass.getName() + "." : "this."; |
| stmtText = prefix + stmtText; |
| } |
| |
| final PsiStatement assignmentStmt = (PsiStatement)CodeStyleManager.getInstance(project).reformat(factory.createStatementFromText(stmtText, methodBody)); |
| final PsiStatement[] statements = methodBody.getStatements(); |
| final int i = FieldFromParameterUtils.findFieldAssignmentAnchor(statements, null, targetClass, parameter); |
| final PsiElement inserted; |
| if (i == statements.length) { |
| inserted = methodBody.add(assignmentStmt); |
| } |
| else { |
| inserted = methodBody.addAfter(assignmentStmt, i > 0 ? statements[i - 1] : null); |
| } |
| editor.getCaretModel().moveToOffset(inserted.getTextRange().getEndOffset()); |
| editor.getScrollingModel().scrollToCaret(ScrollType.RELATIVE); |
| return inserted; |
| } |
| } |