| /* |
| * Copyright 2000-2012 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.lang.folding; |
| |
| import com.intellij.lang.ASTNode; |
| import com.intellij.lang.Commenter; |
| import com.intellij.lang.Language; |
| import com.intellij.lang.LanguageCommenters; |
| import com.intellij.lang.surroundWith.SurroundDescriptor; |
| import com.intellij.lang.surroundWith.Surrounder; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.TextRange; |
| import com.intellij.openapi.util.text.StringUtil; |
| import com.intellij.psi.PsiDocumentManager; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.PsiWhiteSpace; |
| import com.intellij.psi.codeStyle.CodeStyleManager; |
| import com.intellij.psi.codeStyle.CodeStyleSettingsManager; |
| import com.intellij.psi.codeStyle.CommonCodeStyleSettings; |
| import com.intellij.util.IncorrectOperationException; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * @author Rustam Vishnyakov |
| */ |
| public class CustomFoldingSurroundDescriptor implements SurroundDescriptor { |
| |
| public final static CustomFoldingSurroundDescriptor INSTANCE = new CustomFoldingSurroundDescriptor(); |
| public final static CustomFoldingRegionSurrounder[] SURROUNDERS; |
| |
| private final static String DEFAULT_DESC_TEXT = "Description"; |
| |
| static { |
| List<CustomFoldingRegionSurrounder> surrounderList = new ArrayList<CustomFoldingRegionSurrounder>(); |
| for (CustomFoldingProvider provider : CustomFoldingProvider.getAllProviders()) { |
| surrounderList.add(new CustomFoldingRegionSurrounder(provider)); |
| } |
| SURROUNDERS = surrounderList.toArray(new CustomFoldingRegionSurrounder[surrounderList.size()]); |
| } |
| |
| @NotNull |
| @Override |
| public PsiElement[] getElementsToSurround(PsiFile file, int startOffset, int endOffset) { |
| if (startOffset >= endOffset - 1) return PsiElement.EMPTY_ARRAY; |
| Commenter commenter = LanguageCommenters.INSTANCE.forLanguage(file.getLanguage()); |
| if (commenter == null || commenter.getLineCommentPrefix() == null) return PsiElement.EMPTY_ARRAY; |
| PsiElement startElement = file.findElementAt(startOffset); |
| if (startElement instanceof PsiWhiteSpace) startElement = startElement.getNextSibling(); |
| PsiElement endElement = file.findElementAt(endOffset - 1); |
| if (endElement instanceof PsiWhiteSpace) endElement = endElement.getPrevSibling(); |
| if (startElement != null && endElement != null) { |
| if (startElement.getTextRange().getStartOffset() > endElement.getTextRange().getStartOffset()) return PsiElement.EMPTY_ARRAY; |
| startElement = findClosestParentAfterLineBreak(startElement); |
| if (startElement != null) { |
| endElement = findClosestParentBeforeLineBreak(endElement); |
| if (endElement != null) { |
| PsiElement commonParent = startElement.getParent(); |
| if (endElement.getParent() == commonParent) { |
| if (startElement == endElement) return new PsiElement[] {startElement}; |
| return new PsiElement[] {startElement, endElement}; |
| } |
| } |
| } |
| } |
| return PsiElement.EMPTY_ARRAY; |
| } |
| |
| @Nullable |
| private static PsiElement findClosestParentAfterLineBreak(PsiElement element) { |
| PsiElement parent = element; |
| while (parent != null) { |
| PsiElement prev = parent.getPrevSibling(); |
| while (prev != null && prev.getTextLength() <= 0) { |
| prev = prev.getPrevSibling(); |
| } |
| if (isWhiteSpaceWithLineFeed(prev)) return parent; |
| parent = parent.getParent(); |
| } |
| return null; |
| } |
| |
| @Nullable |
| private static PsiElement findClosestParentBeforeLineBreak(PsiElement element) { |
| PsiElement parent = element; |
| while (parent != null) { |
| PsiElement next = parent.getNextSibling(); |
| if (isWhiteSpaceWithLineFeed(next)) return parent; |
| parent = parent.getParent(); |
| } |
| return null; |
| } |
| |
| private static boolean isWhiteSpaceWithLineFeed(@Nullable PsiElement element) { |
| if (element == null) { |
| return false; |
| } |
| if (element instanceof PsiWhiteSpace) { |
| return element.textContains('\n'); |
| } |
| final ASTNode node = element.getNode(); |
| if (node == null) { |
| return false; |
| } |
| final CharSequence text = node.getChars(); |
| boolean lineFeedFound = false; |
| for (int i = 0; i < text.length(); i++) { |
| final char c = text.charAt(i); |
| if (!StringUtil.isWhiteSpace(c)) { |
| return false; |
| } |
| lineFeedFound |= c == '\n'; |
| } |
| return lineFeedFound; |
| } |
| |
| @NotNull |
| @Override |
| public Surrounder[] getSurrounders() { |
| return SURROUNDERS; |
| } |
| |
| @Override |
| public boolean isExclusive() { |
| return false; |
| } |
| |
| private static class CustomFoldingRegionSurrounder implements Surrounder { |
| |
| private final CustomFoldingProvider myProvider; |
| |
| public CustomFoldingRegionSurrounder(@NotNull CustomFoldingProvider provider) { |
| myProvider = provider; |
| } |
| |
| @Override |
| public String getTemplateDescription() { |
| return myProvider.getDescription(); |
| } |
| |
| @Override |
| public boolean isApplicable(@NotNull PsiElement[] elements) { |
| if (elements.length == 0) return false; |
| for (FoldingBuilder each : LanguageFolding.INSTANCE.allForLanguage(elements[0].getLanguage())) { |
| if (each instanceof CustomFoldingBuilder) return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public TextRange surroundElements(@NotNull Project project, @NotNull Editor editor, @NotNull PsiElement[] elements) |
| throws IncorrectOperationException { |
| if (elements.length == 0) return null; |
| PsiElement firstElement = elements[0]; |
| PsiElement lastElement = elements[elements.length - 1]; |
| PsiFile psiFile = firstElement.getContainingFile(); |
| Language language = psiFile.getLanguage(); |
| Commenter commenter = LanguageCommenters.INSTANCE.forLanguage(language); |
| if (commenter == null) return null; |
| String linePrefix = commenter.getLineCommentPrefix(); |
| if (linePrefix == null) return null; |
| int prefixLength = linePrefix.length(); |
| int startOffset = firstElement.getTextRange().getStartOffset(); |
| int endOffset = lastElement.getTextRange().getEndOffset(); |
| int delta = 0; |
| TextRange rangeToSelect = new TextRange(startOffset, startOffset); |
| String startText = myProvider.getStartString(); |
| int descPos = startText.indexOf("?"); |
| if (descPos >= 0) { |
| startText = startText.replace("?", DEFAULT_DESC_TEXT); |
| rangeToSelect = new TextRange(startOffset + descPos, startOffset + descPos + DEFAULT_DESC_TEXT.length()); |
| } |
| String startString = linePrefix + startText + "\n"; |
| String endString = "\n" + linePrefix + myProvider.getEndString(); |
| editor.getDocument().insertString(endOffset, endString); |
| delta += endString.length(); |
| editor.getDocument().insertString(startOffset, startString); |
| delta += startString.length(); |
| rangeToSelect = rangeToSelect.shiftRight(prefixLength); |
| PsiDocumentManager documentManager = PsiDocumentManager.getInstance(project); |
| documentManager.commitDocument(documentManager.getDocument(psiFile)); |
| adjustLineIndent(project, psiFile, language, |
| new TextRange(endOffset + delta - endString.length(), endOffset + delta)); |
| adjustLineIndent(project, psiFile, language, |
| new TextRange(startOffset, startOffset + startString.length())); |
| return rangeToSelect; |
| } |
| |
| private static void adjustLineIndent(@NotNull Project project, PsiFile file, Language language, TextRange range) { |
| CommonCodeStyleSettings formatSettings = CodeStyleSettingsManager.getSettings(project).getCommonSettings(language); |
| boolean keepAtFirstCol = formatSettings.KEEP_FIRST_COLUMN_COMMENT; |
| formatSettings.KEEP_FIRST_COLUMN_COMMENT = false; |
| CodeStyleManager.getInstance(project).adjustLineIndent(file, range); |
| formatSettings.KEEP_FIRST_COLUMN_COMMENT = keepAtFirstCol; |
| } |
| } |
| } |