| /* |
| * Copyright 2000-2014 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.Language; |
| import com.intellij.lang.LanguageExtension; |
| import com.intellij.openapi.editor.Document; |
| import com.intellij.openapi.project.DumbService; |
| import com.intellij.psi.PsiElement; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * @author yole |
| * @author Konstantin Bulenkov |
| */ |
| public class LanguageFolding extends LanguageExtension<FoldingBuilder> { |
| public static final LanguageFolding INSTANCE = new LanguageFolding(); |
| |
| private LanguageFolding() { |
| super("com.intellij.lang.foldingBuilder"); |
| } |
| |
| @Override |
| public FoldingBuilder forLanguage(@NotNull Language l) { |
| FoldingBuilder cached = l.getUserData(getLanguageCache()); |
| if (cached != null) return cached; |
| |
| List<FoldingBuilder> extensions = forKey(l); |
| FoldingBuilder result; |
| if (extensions.isEmpty()) { |
| |
| Language base = l.getBaseLanguage(); |
| if (base != null) { |
| result = forLanguage(base); |
| } |
| else { |
| result = getDefaultImplementation(); |
| } |
| } |
| else { |
| return extensions.size() == 1 ? extensions.get(0) : new CompositeFoldingBuilder(extensions); |
| } |
| |
| l.putUserData(getLanguageCache(), result); |
| return result; |
| } |
| |
| @NotNull |
| @Override |
| public List<FoldingBuilder> allForLanguage(@NotNull Language l) { |
| FoldingBuilder result = forLanguage(l); |
| if (result == null) return Collections.emptyList(); |
| return result instanceof CompositeFoldingBuilder ? ((CompositeFoldingBuilder)result).getAllBuilders() |
| : Collections.singletonList(result); |
| } |
| |
| @NotNull |
| public static FoldingDescriptor[] buildFoldingDescriptors(@Nullable FoldingBuilder builder, @NotNull PsiElement root, @NotNull Document document, boolean quick) { |
| if (!DumbService.isDumbAware(builder) && DumbService.getInstance(root.getProject()).isDumb()) { |
| return FoldingDescriptor.EMPTY; |
| } |
| |
| if (builder instanceof FoldingBuilderEx) { |
| return ((FoldingBuilderEx)builder).buildFoldRegions(root, document, quick); |
| } |
| final ASTNode astNode = root.getNode(); |
| if (astNode == null || builder == null) { |
| return FoldingDescriptor.EMPTY; |
| } |
| |
| return builder.buildFoldRegions(astNode, document); |
| } |
| } |