| /* |
| * 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.lang.folding; |
| |
| import com.intellij.lang.ASTNode; |
| import com.intellij.lang.Language; |
| import com.intellij.openapi.editor.FoldingGroup; |
| import com.intellij.openapi.util.TextRange; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.util.ObjectUtils; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| |
| /** |
| * Defines a single folding region in the code. |
| * |
| * @author max |
| * @see FoldingBuilder |
| */ |
| public class FoldingDescriptor { |
| public static final FoldingDescriptor[] EMPTY = new FoldingDescriptor[0]; |
| |
| private final ASTNode myElement; |
| private final TextRange myRange; |
| @Nullable private final FoldingGroup myGroup; |
| private final Set<Object> myDependencies; |
| private final boolean myNeverExpands; |
| |
| /** |
| * Creates a folding region related to the specified AST node and covering the specified |
| * text range. |
| * @param node The node to which the folding region is related. The node is then passed to |
| * {@link FoldingBuilder#getPlaceholderText(com.intellij.lang.ASTNode)} and |
| * {@link FoldingBuilder#isCollapsedByDefault(com.intellij.lang.ASTNode)}. |
| * @param range The folded text range. |
| */ |
| public FoldingDescriptor(@NotNull ASTNode node, @NotNull TextRange range) { |
| this(node, range, null); |
| } |
| |
| public FoldingDescriptor(@NotNull PsiElement element, @NotNull TextRange range) { |
| this(ObjectUtils.assertNotNull(element.getNode()), range, null); |
| } |
| |
| public FoldingDescriptor(@NotNull ASTNode node, @NotNull TextRange range, @Nullable FoldingGroup group) { |
| this(node, range, group, Collections.<Object>emptySet()); |
| } |
| |
| /** |
| * Creates a folding region related to the specified AST node and covering the specified |
| * text range. |
| * @param node The node to which the folding region is related. The node is then passed to |
| * {@link com.intellij.lang.folding.FoldingBuilder#getPlaceholderText(com.intellij.lang.ASTNode)} and |
| * {@link com.intellij.lang.folding.FoldingBuilder#isCollapsedByDefault(com.intellij.lang.ASTNode)}. |
| * @param range The folded text range. |
| * @param group Regions with the same group instance expand and collapse together. |
| * @param dependencies folding dependencies: other files or elements that could change |
| * folding description |
| */ |
| public FoldingDescriptor(@NotNull ASTNode node, @NotNull TextRange range, @Nullable FoldingGroup group, Set<Object> dependencies) { |
| this(node, range, group, dependencies, false); |
| } |
| |
| /** |
| * Creates a folding region related to the specified AST node and covering the specified |
| * text range. |
| * @param node The node to which the folding region is related. The node is then passed to |
| * {@link com.intellij.lang.folding.FoldingBuilder#getPlaceholderText(com.intellij.lang.ASTNode)} and |
| * {@link com.intellij.lang.folding.FoldingBuilder#isCollapsedByDefault(com.intellij.lang.ASTNode)}. |
| * @param range The folded text range. |
| * @param group Regions with the same group instance expand and collapse together. |
| * @param dependencies folding dependencies: other files or elements that could change |
| * @param neverExpands shall be true for fold regions that must not be ever expanded. |
| */ |
| public FoldingDescriptor(@NotNull ASTNode node, |
| @NotNull TextRange range, |
| @Nullable FoldingGroup group, |
| Set<Object> dependencies, |
| boolean neverExpands) { |
| assert range.getLength() > 0 : range + ", text: " + node.getText() + ", language = " + node.getPsi().getLanguage(); |
| myElement = node; |
| TextRange.assertProperRange(range); |
| myRange = range; |
| myGroup = group; |
| myDependencies = dependencies; |
| assert !myDependencies.contains(null); |
| myNeverExpands = neverExpands; |
| } |
| |
| /** |
| * @return the node to which the folding region is related. |
| */ |
| @NotNull |
| public ASTNode getElement() { |
| return myElement; |
| } |
| |
| /** |
| * Returns the folded text range. |
| * @return the folded text range. |
| */ |
| @NotNull |
| public TextRange getRange() { |
| return myRange; |
| } |
| |
| @Nullable |
| public FoldingGroup getGroup() { |
| return myGroup; |
| } |
| |
| @Nullable |
| public String getPlaceholderText() { |
| final PsiElement psiElement = myElement.getPsi(); |
| if (psiElement == null) return null; |
| |
| final Language lang = psiElement.getLanguage(); |
| final FoldingBuilder foldingBuilder = LanguageFolding.INSTANCE.forLanguage(lang); |
| if (foldingBuilder != null) { |
| return foldingBuilder instanceof FoldingBuilderEx |
| ? ((FoldingBuilderEx)foldingBuilder).getPlaceholderText(myElement, myRange) |
| : foldingBuilder.getPlaceholderText(myElement); |
| } |
| return null; |
| } |
| |
| @NotNull |
| public Set<Object> getDependencies() { |
| return myDependencies; |
| } |
| |
| public boolean isNonExpandable() { |
| return myNeverExpands; |
| } |
| |
| @SuppressWarnings("HardCodedStringLiteral") |
| @Override |
| public String toString() { |
| return myRange + " for AST: " + myElement; |
| } |
| } |