| /* |
| * 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; |
| |
| import com.intellij.lexer.Lexer; |
| import com.intellij.openapi.util.Condition; |
| import com.intellij.psi.FileViewProvider; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.templateLanguages.TemplateLanguage; |
| import com.intellij.util.containers.ContainerUtil; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.Comparator; |
| import java.util.List; |
| import java.util.Set; |
| |
| public final class LanguageUtil { |
| private LanguageUtil() { |
| } |
| |
| public static final Comparator<Language> LANGUAGE_COMPARATOR = new Comparator<Language>() { |
| @Override |
| public int compare(Language o1, Language o2) { |
| return o1.getDisplayName().compareToIgnoreCase(o2.getDisplayName()); |
| } |
| }; |
| |
| public static ParserDefinition.SpaceRequirements canStickTokensTogetherByLexer(ASTNode left, ASTNode right, Lexer lexer) { |
| String textStr = left.getText() + right.getText(); |
| |
| lexer.start(textStr, 0, textStr.length()); |
| if(lexer.getTokenType() != left.getElementType()) return ParserDefinition.SpaceRequirements.MUST; |
| if(lexer.getTokenEnd() != left.getTextLength()) return ParserDefinition.SpaceRequirements.MUST; |
| lexer.advance(); |
| if(lexer.getTokenEnd() != textStr.length()) return ParserDefinition.SpaceRequirements.MUST; |
| if(lexer.getTokenType() != right.getElementType()) return ParserDefinition.SpaceRequirements.MUST; |
| return ParserDefinition.SpaceRequirements.MAY; |
| } |
| |
| @NotNull |
| public static Language[] getLanguageDialects(final Language base) { |
| final List<Language> list = ContainerUtil.findAll(Language.getRegisteredLanguages(), new Condition<Language>() { |
| @Override |
| public boolean value(final Language language) { |
| return language.getBaseLanguage() == base; |
| } |
| }); |
| return list.toArray(new Language[list.size()]); |
| } |
| |
| public static boolean isInTemplateLanguageFile(@Nullable final PsiElement element) { |
| if (element == null) return false; |
| |
| final PsiFile psiFile = element.getContainingFile(); |
| if(psiFile == null) return false; |
| |
| final Language language = psiFile.getViewProvider().getBaseLanguage(); |
| return language instanceof TemplateLanguage; |
| } |
| |
| public static boolean isInjectableLanguage(Language language) { |
| if (language == Language.ANY) { |
| return false; |
| } |
| if (language.getID().startsWith("$")) { |
| return false; |
| } |
| if (language instanceof InjectableLanguage) { |
| return true; |
| } |
| if (language instanceof TemplateLanguage || language instanceof DependentLanguage) { |
| return false; |
| } |
| if (LanguageParserDefinitions.INSTANCE.forLanguage(language) == null) { |
| return false; |
| } |
| return true; |
| } |
| |
| @NotNull |
| public static Language getRootLanguage(@NotNull PsiElement element) { |
| final FileViewProvider provider = element.getContainingFile().getViewProvider(); |
| final Set<Language> languages = provider.getLanguages(); |
| if (languages.size() > 1) { |
| PsiElement current = element; |
| while (current != null) { |
| final Language language = current.getLanguage(); |
| if (languages.contains(language)) return language; |
| current = current.getParent(); |
| } |
| } |
| return provider.getBaseLanguage(); |
| } |
| } |