| /* |
| * 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.refactoring.extractmethod; |
| |
| import com.intellij.codeInsight.codeFragment.CannotCreateCodeFragmentException; |
| import com.intellij.openapi.actionSystem.DataContext; |
| import com.intellij.openapi.editor.*; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.PsiComment; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.refactoring.RefactoringActionHandler; |
| import com.intellij.refactoring.RefactoringBundle; |
| import com.intellij.refactoring.util.CommonRefactoringUtil; |
| import com.jetbrains.python.PyBundle; |
| import com.jetbrains.python.codeInsight.codeFragment.PyCodeFragment; |
| import com.jetbrains.python.codeInsight.codeFragment.PyCodeFragmentUtil; |
| import com.jetbrains.python.codeInsight.controlflow.ScopeOwner; |
| import com.jetbrains.python.psi.PyElement; |
| import com.jetbrains.python.psi.impl.PyPsiUtils; |
| import com.jetbrains.python.refactoring.PyRefactoringUtil; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * @author oleg |
| */ |
| public class PyExtractMethodHandler implements RefactoringActionHandler { |
| @Override |
| public void invoke(@NotNull final Project project, final Editor editor, final PsiFile file, final DataContext dataContext) { |
| editor.getScrollingModel().scrollToCaret(ScrollType.MAKE_VISIBLE); |
| // select editor text fragment |
| if (!editor.getSelectionModel().hasSelection()) { |
| editor.getSelectionModel().selectLineAtCaret(); |
| } |
| invokeOnEditor(project, editor, file); |
| } |
| |
| @Override |
| public void invoke(@NotNull final Project project, @NotNull final PsiElement[] elements, final DataContext dataContext) { |
| } |
| |
| private static void invokeOnEditor(final Project project, final Editor editor, final PsiFile file) { |
| CommonRefactoringUtil.checkReadOnlyStatus(project, file); |
| PsiElement element1 = null; |
| PsiElement element2 = null; |
| final SelectionModel selectionModel = editor.getSelectionModel(); |
| if (selectionModel.hasSelection()) { |
| element1 = file.findElementAt(selectionModel.getSelectionStart()); |
| element2 = file.findElementAt(selectionModel.getSelectionEnd() - 1); |
| } |
| else { |
| final CaretModel caretModel = editor.getCaretModel(); |
| final Document document = editor.getDocument(); |
| int lineNumber = document.getLineNumber(caretModel.getOffset()); |
| if ((lineNumber >= 0) && (lineNumber < document.getLineCount())) { |
| element1 = file.findElementAt(document.getLineStartOffset(lineNumber)); |
| element2 = file.findElementAt(document.getLineEndOffset(lineNumber) - 1); |
| } |
| } |
| // Pass comments and whitespaces |
| element1 = PyPsiUtils.getSignificantToTheRight(element1, false); |
| element2 = PyPsiUtils.getSignificantToTheLeft(element2, false); |
| if (element1 == null || element2 == null) { |
| CommonRefactoringUtil.showErrorHint(project, editor, |
| PyBundle.message("refactoring.extract.method.error.cannot.perform.refactoring.using.selected.elements"), |
| RefactoringBundle.message("extract.method.title"), "refactoring.extractMethod"); |
| return; |
| } |
| |
| final PsiElement[] statements = getStatementsRange(element1, element2); |
| if (statements != null) { |
| final ScopeOwner owner = PsiTreeUtil.getParentOfType(statements[0], ScopeOwner.class); |
| if (owner == null) { |
| return; |
| } |
| final PyCodeFragment fragment; |
| try { |
| fragment = PyCodeFragmentUtil.createCodeFragment(owner, element1, element2); |
| } |
| catch (CannotCreateCodeFragmentException e) { |
| CommonRefactoringUtil.showErrorHint(project, editor, e.getMessage(), |
| RefactoringBundle.message("extract.method.title"), "refactoring.extractMethod"); |
| return; |
| } |
| PyExtractMethodUtil.extractFromStatements(project, editor, fragment, statements[0], statements[1]); |
| return; |
| } |
| |
| final PsiElement expression = PyRefactoringUtil.getSelectedExpression(project, file, element1, element2); |
| if (expression != null) { |
| final ScopeOwner owner = PsiTreeUtil.getParentOfType(element1, ScopeOwner.class); |
| if (owner == null) { |
| return; |
| } |
| final PyCodeFragment fragment; |
| try { |
| fragment = PyCodeFragmentUtil.createCodeFragment(owner, element1, element2); |
| } |
| catch (CannotCreateCodeFragmentException e) { |
| CommonRefactoringUtil.showErrorHint(project, editor, e.getMessage(), |
| RefactoringBundle.message("extract.method.title"), "refactoring.extractMethod"); |
| return; |
| } |
| PyExtractMethodUtil.extractFromExpression(project, editor, fragment, expression); |
| return; |
| } |
| |
| CommonRefactoringUtil.showErrorHint(project, editor, |
| PyBundle.message("refactoring.extract.method.error.cannot.perform.refactoring.using.selected.elements"), |
| RefactoringBundle.message("extract.method.title"), "refactoring.extractMethod"); |
| } |
| |
| @Nullable |
| private static PsiElement[] getStatementsRange(final PsiElement element1, final PsiElement element2) { |
| final PsiElement parent = PsiTreeUtil.findCommonParent(element1, element2); |
| if (parent == null) { |
| return null; |
| } |
| |
| final PyElement statementList = PyPsiUtils.getStatementList(parent); |
| if (statementList == null) { |
| return null; |
| } |
| |
| final PsiElement statement1 = PyPsiUtils.getStatement(statementList, element1); |
| final PsiElement statement2 = PyPsiUtils.getStatement(statementList, element2); |
| if (statement1 == null || statement2 == null){ |
| return null; |
| } |
| |
| // return elements if they are really first and last elements of statements |
| if (element1 == PsiTreeUtil.getDeepestFirst(statement1) && |
| element2 == PyPsiUtils.getSignificantToTheLeft(PsiTreeUtil.getDeepestLast(statement2), !(element2 instanceof PsiComment))) { |
| return new PsiElement[]{statement1, statement2}; |
| } |
| return null; |
| } |
| } |