| /* |
| * 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.completion.util; |
| |
| import com.intellij.codeInsight.completion.InsertHandler; |
| import com.intellij.codeInsight.completion.InsertionContext; |
| import com.intellij.codeInsight.lookup.LookupElement; |
| import com.intellij.openapi.editor.Document; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.util.text.StringUtil; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.PsiWhiteSpace; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * @author peter |
| */ |
| public abstract class ParenthesesInsertHandler<T extends LookupElement> implements InsertHandler<T> { |
| public static final ParenthesesInsertHandler<LookupElement> WITH_PARAMETERS = new ParenthesesInsertHandler<LookupElement>() { |
| @Override |
| protected boolean placeCaretInsideParentheses(final InsertionContext context, final LookupElement item) { |
| return true; |
| } |
| }; |
| public static final ParenthesesInsertHandler<LookupElement> NO_PARAMETERS = new ParenthesesInsertHandler<LookupElement>() { |
| @Override |
| protected boolean placeCaretInsideParentheses(final InsertionContext context, final LookupElement item) { |
| return false; |
| } |
| }; |
| |
| public static ParenthesesInsertHandler<LookupElement> getInstance(boolean hasParameters) { |
| return hasParameters ? WITH_PARAMETERS : NO_PARAMETERS; |
| } |
| |
| public static ParenthesesInsertHandler<LookupElement> getInstance(final boolean hasParameters, final boolean spaceBeforeParentheses, |
| final boolean spaceBetweenParentheses, |
| final boolean insertRightParenthesis, boolean allowParametersOnNextLine) { |
| return new ParenthesesInsertHandler<LookupElement>(spaceBeforeParentheses, spaceBetweenParentheses, insertRightParenthesis, allowParametersOnNextLine) { |
| @Override |
| protected boolean placeCaretInsideParentheses(InsertionContext context, LookupElement item) { |
| return hasParameters; |
| } |
| }; |
| } |
| |
| private final boolean mySpaceBeforeParentheses; |
| private final boolean mySpaceBetweenParentheses; |
| private final boolean myMayInsertRightParenthesis; |
| private final boolean myAllowParametersOnNextLine; |
| |
| protected ParenthesesInsertHandler(final boolean spaceBeforeParentheses, |
| final boolean spaceBetweenParentheses, |
| final boolean mayInsertRightParenthesis) { |
| this(spaceBeforeParentheses, spaceBetweenParentheses, mayInsertRightParenthesis, false); |
| } |
| |
| protected ParenthesesInsertHandler(boolean spaceBeforeParentheses, |
| boolean spaceBetweenParentheses, |
| boolean mayInsertRightParenthesis, |
| boolean allowParametersOnNextLine) { |
| mySpaceBeforeParentheses = spaceBeforeParentheses; |
| mySpaceBetweenParentheses = spaceBetweenParentheses; |
| myMayInsertRightParenthesis = mayInsertRightParenthesis; |
| myAllowParametersOnNextLine = allowParametersOnNextLine; |
| } |
| |
| protected ParenthesesInsertHandler() { |
| this(false, false, true); |
| } |
| |
| private static boolean isToken(@Nullable final PsiElement element, final String text) { |
| return element != null && text.equals(element.getText()); |
| } |
| |
| protected abstract boolean placeCaretInsideParentheses(final InsertionContext context, final T item); |
| |
| @Override |
| public void handleInsert(final InsertionContext context, final T item) { |
| final Editor editor = context.getEditor(); |
| final Document document = editor.getDocument(); |
| context.commitDocument(); |
| PsiElement element = findNextToken(context); |
| |
| final char completionChar = context.getCompletionChar(); |
| final boolean putCaretInside = completionChar == '(' || placeCaretInsideParentheses(context, item); |
| |
| if (completionChar == '(') { |
| context.setAddCompletionChar(false); |
| } |
| |
| if (isToken(element, "(")) { |
| int lparenthOffset = element.getTextRange().getStartOffset(); |
| if (mySpaceBeforeParentheses && lparenthOffset == context.getTailOffset()) { |
| document.insertString(context.getTailOffset(), " "); |
| lparenthOffset++; |
| } |
| |
| if (completionChar == '(' || completionChar == '\t') { |
| editor.getCaretModel().moveToOffset(lparenthOffset + 1); |
| } else { |
| editor.getCaretModel().moveToOffset(context.getTailOffset()); |
| } |
| |
| context.setTailOffset(lparenthOffset + 1); |
| |
| PsiElement list = element.getParent(); |
| PsiElement last = list.getLastChild(); |
| if (isToken(last, ")")) { |
| int rparenthOffset = last.getTextRange().getStartOffset(); |
| context.setTailOffset(rparenthOffset + 1); |
| if (!putCaretInside) { |
| for (int i = lparenthOffset + 1; i < rparenthOffset; i++) { |
| if (!Character.isWhitespace(document.getCharsSequence().charAt(i))) { |
| return; |
| } |
| } |
| editor.getCaretModel().moveToOffset(context.getTailOffset()); |
| } else if (mySpaceBetweenParentheses && document.getCharsSequence().charAt(lparenthOffset) == ' ') { |
| editor.getCaretModel().moveToOffset(lparenthOffset + 2); |
| } else { |
| editor.getCaretModel().moveToOffset(lparenthOffset + 1); |
| } |
| return; |
| } |
| } else { |
| document.insertString(context.getTailOffset(), getSpace(mySpaceBeforeParentheses) + "(" + getSpace(mySpaceBetweenParentheses)); |
| editor.getCaretModel().moveToOffset(context.getTailOffset()); |
| } |
| |
| if (!myMayInsertRightParenthesis) return; |
| |
| if (context.getCompletionChar() == '(') { |
| //todo use BraceMatchingUtil.isPairedBracesAllowedBeforeTypeInFileType |
| int tail = context.getTailOffset(); |
| if (tail < document.getTextLength() && StringUtil.isJavaIdentifierPart(document.getCharsSequence().charAt(tail))) { |
| return; |
| } |
| } |
| |
| document.insertString(context.getTailOffset(), getSpace(mySpaceBetweenParentheses) + ")"); |
| if (!putCaretInside) { |
| editor.getCaretModel().moveToOffset(context.getTailOffset()); |
| } |
| } |
| |
| private static String getSpace(boolean needSpace) { |
| return needSpace ? " " : ""; |
| } |
| |
| @Nullable |
| protected PsiElement findNextToken(final InsertionContext context) { |
| final PsiFile file = context.getFile(); |
| PsiElement element = file.findElementAt(context.getTailOffset()); |
| if (element instanceof PsiWhiteSpace) { |
| if (!myAllowParametersOnNextLine && element.getText().contains("\n")) { |
| return null; |
| } |
| element = file.findElementAt(element.getTextRange().getEndOffset()); |
| } |
| return element; |
| } |
| |
| } |