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/*
* 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.editorActions.smartEnter;
import com.google.common.collect.ImmutableList;
import com.intellij.codeInsight.editorActions.smartEnter.SmartEnterProcessor;
import com.intellij.codeInsight.lookup.LookupManager;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Key;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiWhiteSpace;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.util.IncorrectOperationException;
import com.jetbrains.python.codeInsight.editorActions.smartEnter.enterProcessors.EnterProcessor;
import com.jetbrains.python.codeInsight.editorActions.smartEnter.enterProcessors.PyCommentBreakerEnterProcessor;
import com.jetbrains.python.codeInsight.editorActions.smartEnter.enterProcessors.PyPlainEnterProcessor;
import com.jetbrains.python.codeInsight.editorActions.smartEnter.fixers.*;
import com.jetbrains.python.psi.PyFile;
import com.jetbrains.python.psi.PyStatement;
import com.jetbrains.python.psi.PyStatementList;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.ArrayList;
import java.util.List;
/**
* Created by IntelliJ IDEA.
* Author: Alexey.Ivanov
* Date: 15.04.2010
* Time: 15:55:57
*/
public class PySmartEnterProcessor extends SmartEnterProcessor {
private static final Logger LOG = Logger.getInstance("#com.jetbrains.python.codeInsight.editorActions.smartEnter.PySmartEnterProcessor");
private static final List<PyFixer> ourFixers = ImmutableList.<PyFixer>builder()
.add(new PyStringLiteralFixer())
.add(new PyParenthesizedFixer())
.add(new PyMissingBracesFixer())
.add(new PyConditionalStatementPartFixer())
.add(new PyUnconditionalStatementPartFixer())
.add(new PyForPartFixer())
.add(new PyExceptFixer())
.add(new PyArgumentListFixer())
.add(new PyParameterListFixer())
.add(new PyFunctionFixer())
.add(new PyClassFixer())
.add(new PyWithFixer())
.build();
private static final List<EnterProcessor> ourProcessors = ImmutableList.of(new PyCommentBreakerEnterProcessor(),
new PyPlainEnterProcessor());
private static class TooManyAttemptsException extends Exception {
}
private static void collectAllElements(final PsiElement element, @NotNull final List<PsiElement> result, boolean recurse) {
result.add(0, element);
if (doNotStep(element)) {
if (!recurse) {
return;
}
recurse = false;
}
final PsiElement[] children = element.getChildren();
for (PsiElement child : children) {
if (element instanceof PyStatement && child instanceof PyStatement) {
continue;
}
collectAllElements(child, result, recurse);
}
}
private static boolean doNotStep(final PsiElement element) {
return (element instanceof PyStatementList) || (element instanceof PyStatement);
}
private static boolean isModified(@NotNull final Editor editor) {
final Long timestamp = editor.getUserData(SMART_ENTER_TIMESTAMP);
return editor.getDocument().getModificationStamp() != timestamp.longValue();
}
private int myFirstErrorOffset = Integer.MAX_VALUE;
private static final int MAX_ATTEMPTS = 20;
private static final Key<Long> SMART_ENTER_TIMESTAMP = Key.create("smartEnterOriginalTimestamp");
@Override
public boolean process(@NotNull final Project project, @NotNull final Editor editor, @NotNull final PsiFile psiFile) {
final Document document = editor.getDocument();
final String textForRollBack = document.getText();
final int offset = editor.getCaretModel().getOffset();
try {
editor.putUserData(SMART_ENTER_TIMESTAMP, editor.getDocument().getModificationStamp());
myFirstErrorOffset = Integer.MAX_VALUE;
process(project, editor, psiFile, 0);
}
catch (TooManyAttemptsException e) {
LOG.info(e);
document.replaceString(0, document.getTextLength(), textForRollBack);
editor.getCaretModel().moveToOffset(offset);
}
finally {
editor.putUserData(SMART_ENTER_TIMESTAMP, null);
}
return true;
}
private void process(@NotNull final Project project, @NotNull final Editor editor, @NotNull final PsiFile psiFile, final int attempt)
throws TooManyAttemptsException {
if (attempt > MAX_ATTEMPTS) {
throw new TooManyAttemptsException();
}
try {
commit(editor);
if (myFirstErrorOffset != Integer.MAX_VALUE) {
editor.getCaretModel().moveToOffset(myFirstErrorOffset);
}
//myFirstErrorOffset = Integer.MAX_VALUE;
PsiElement statementAtCaret = getStatementAtCaret(editor, psiFile);
if (statementAtCaret == null) {
if (!new PyCommentBreakerEnterProcessor().doEnter(editor, psiFile, false)) {
SmartEnterUtil.plainEnter(editor);
}
return;
}
List<PsiElement> queue = new ArrayList<PsiElement>();
collectAllElements(statementAtCaret, queue, true);
queue.add(statementAtCaret);
for (PsiElement element : queue) {
for (PyFixer fixer : ourFixers) {
fixer.apply(editor, this, element);
if (LookupManager.getInstance(project).getActiveLookup() != null) {
return;
}
if (isUncommited(project) || !element.isValid()) {
process(project, editor, psiFile, attempt + 1);
return;
}
}
}
doEnter(statementAtCaret, editor);
}
catch (IncorrectOperationException e) {
LOG.error(e);
}
}
private void doEnter(final PsiElement atCaret, final Editor editor) {
if (myFirstErrorOffset != Integer.MAX_VALUE) {
editor.getCaretModel().moveToOffset(myFirstErrorOffset);
return;
}
commit(editor);
for (EnterProcessor enterProcessor : ourProcessors) {
if (enterProcessor.doEnter(editor, atCaret, isModified(editor))) {
return;
}
}
if (!isModified(editor)) {
SmartEnterUtil.plainEnter(editor);
}
else {
if (myFirstErrorOffset == Integer.MAX_VALUE) {
editor.getCaretModel().moveToOffset(atCaret.getTextRange().getEndOffset());
}
else {
editor.getCaretModel().moveToOffset(myFirstErrorOffset);
}
}
}
@Nullable
protected PsiElement getStatementAtCaret(Editor editor, PsiFile psiFile) {
PsiElement statementAtCaret = super.getStatementAtCaret(editor, psiFile);
if (statementAtCaret instanceof PsiWhiteSpace) {
return null;
}
if (statementAtCaret == null) {
return null;
}
final PyStatementList statementList = PsiTreeUtil.getParentOfType(statementAtCaret, PyStatementList.class, false);
if (statementList != null) {
for (PyStatement statement : statementList.getStatements()) {
if (PsiTreeUtil.isAncestor(statement, statementAtCaret, true)) {
return statement;
}
}
}
else {
final PyFile file = PsiTreeUtil.getParentOfType(statementAtCaret, PyFile.class, false);
if (file != null) {
for (PyStatement statement : file.getStatements()) {
if (PsiTreeUtil.isAncestor(statement, statementAtCaret, true)) {
return statement;
}
}
}
}
return null;
}
public void registerUnresolvedError(int offset) {
if (offset < myFirstErrorOffset) {
myFirstErrorOffset = offset;
}
}
}
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