| /* |
| * 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; |
| |
| import com.intellij.lang.ASTNode; |
| import com.intellij.lang.LanguageUtil; |
| import com.intellij.lang.ParserDefinition; |
| import com.intellij.lang.TokenSeparatorGenerator; |
| import com.intellij.lexer.Lexer; |
| import com.intellij.openapi.util.text.StringUtil; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiManager; |
| import com.intellij.psi.TokenType; |
| import com.intellij.psi.impl.source.tree.Factory; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.jetbrains.python.lexer.PythonIndentingLexer; |
| import com.jetbrains.python.psi.PyFunction; |
| import com.jetbrains.python.psi.PyStatement; |
| import com.jetbrains.python.psi.impl.PyPsiUtils; |
| |
| /** |
| * @author yole |
| */ |
| public class PyTokenSeparatorGenerator implements TokenSeparatorGenerator { |
| public ASTNode generateWhitespaceBetweenTokens(ASTNode left, ASTNode right) { |
| PsiManager manager = right.getTreeParent().getPsi().getManager(); |
| if (left.getElementType() == PyTokenTypes.END_OF_LINE_COMMENT) { |
| return createLineBreak(manager); |
| } |
| |
| if (left.getPsi().isValid() && right.getPsi().isValid()) { |
| final PsiElement commonParent = PsiTreeUtil.findCommonParent(left.getPsi(), right.getPsi()); |
| if (commonParent == null) return null; |
| final PsiElement leftPrevAncestor = PsiTreeUtil.findPrevParent(commonParent, left.getPsi()); |
| final PsiElement rightPrevAncestor = PsiTreeUtil.findPrevParent(commonParent, right.getPsi()); |
| |
| if (isStatementOrFunction(leftPrevAncestor) && isStatementOrFunction(rightPrevAncestor)) { |
| int leftIndent = PyPsiUtils.getElementIndentation(leftPrevAncestor); |
| int rightIndent = PyPsiUtils.getElementIndentation(rightPrevAncestor); |
| int maxIndent = Math.max(leftIndent, rightIndent); |
| return createWhitespace(manager, "\n" + StringUtil.repeatSymbol(' ', maxIndent)); |
| } |
| } |
| |
| if (right.getElementType() == PyTokenTypes.DEF_KEYWORD || right.getElementType() == PyTokenTypes.CLASS_KEYWORD) { |
| return createLineBreak(manager); |
| } |
| if (left.getElementType() == TokenType.WHITE_SPACE || right.getElementType() == TokenType.WHITE_SPACE) { |
| return null; |
| } |
| final PyStatement leftStatement = PsiTreeUtil.getParentOfType(left.getPsi(), PyStatement.class); |
| if (leftStatement != null && !PsiTreeUtil.isAncestor(leftStatement, right.getPsi(), false)) { |
| return createLineBreak(manager); |
| } |
| final Lexer lexer = new PythonIndentingLexer(); |
| if (LanguageUtil.canStickTokensTogetherByLexer(left, right, lexer) == ParserDefinition.SpaceRequirements.MUST) { |
| return createSpace(manager); |
| } |
| return null; |
| } |
| |
| private static boolean isStatementOrFunction(PsiElement element) { |
| return element instanceof PyFunction || element instanceof PyStatement; |
| } |
| |
| private static ASTNode createSpace(PsiManager manager) { |
| return createWhitespace(manager, " "); |
| } |
| |
| private static ASTNode createLineBreak(PsiManager manager) { |
| return createWhitespace(manager, "\n"); |
| } |
| |
| private static ASTNode createWhitespace(PsiManager manager, final String text) { |
| return Factory.createSingleLeafElement(TokenType.WHITE_SPACE, text, 0, text.length(), null, manager); |
| } |
| } |