| /* |
| * 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 org.intellij.lang.regexp; |
| |
| import com.intellij.lang.injection.InjectedLanguageManager; |
| import com.intellij.openapi.util.ClassExtension; |
| import com.intellij.psi.PsiComment; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiLanguageInjectionHost; |
| import org.intellij.lang.regexp.psi.RegExpChar; |
| import org.intellij.lang.regexp.psi.RegExpGroup; |
| import org.intellij.lang.regexp.psi.RegExpPyCondRef; |
| import org.intellij.lang.regexp.psi.RegExpQuantifier; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * @author yole |
| */ |
| public final class RegExpLanguageHosts extends ClassExtension<RegExpLanguageHost> { |
| private static final RegExpLanguageHosts INSTANCE = new RegExpLanguageHosts(); |
| private final DefaultRegExpPropertiesProvider myDefaultProvider; |
| |
| public static RegExpLanguageHosts getInstance() { |
| return INSTANCE; |
| } |
| |
| private RegExpLanguageHosts() { |
| super("com.intellij.regExpLanguageHost"); |
| myDefaultProvider = DefaultRegExpPropertiesProvider.getInstance(); |
| } |
| |
| @Nullable |
| private static RegExpLanguageHost findRegExpHost(@Nullable final PsiElement element) { |
| if (element == null) { |
| return null; |
| } |
| PsiLanguageInjectionHost host = InjectedLanguageManager.getInstance(element.getProject()).getInjectionHost(element); |
| if (host instanceof RegExpLanguageHost) { |
| return (RegExpLanguageHost)host; |
| } |
| if (host != null) { |
| return INSTANCE.forClass(host.getClass()); |
| } |
| return null; |
| } |
| |
| public boolean isRedundantEscape(@NotNull final RegExpChar ch, @NotNull final String text) { |
| if (text.length() <= 1) { |
| return false; |
| } |
| final RegExpLanguageHost host = findRegExpHost(ch); |
| if (host != null) { |
| final char c = text.charAt(1); |
| final boolean needsEscaping = host.characterNeedsEscaping(c); |
| return !needsEscaping; |
| } |
| else { |
| return !("\\]".equals(text) || "\\}".equals(text)); |
| } |
| } |
| |
| public boolean supportsNamedGroupSyntax(@Nullable final RegExpGroup group) { |
| final RegExpLanguageHost host = findRegExpHost(group); |
| return host != null && host.supportsNamedGroupSyntax(group); |
| } |
| |
| public boolean supportsPerl5EmbeddedComments(@Nullable final PsiComment comment) { |
| final RegExpLanguageHost host = findRegExpHost(comment); |
| return host != null && host.supportsPerl5EmbeddedComments(); |
| } |
| |
| public boolean supportsPythonConditionalRefs(@Nullable final RegExpPyCondRef condRef) { |
| final RegExpLanguageHost host = findRegExpHost(condRef); |
| return host != null && host.supportsPythonConditionalRefs(); |
| } |
| |
| public boolean supportsPossessiveQuantifiers(@Nullable final RegExpQuantifier quantifier) { |
| final RegExpLanguageHost host = findRegExpHost(quantifier); |
| return host == null || host.supportsPossessiveQuantifiers(); |
| } |
| |
| public boolean isValidCategory(@NotNull final PsiElement element, @NotNull String category) { |
| final RegExpLanguageHost host = findRegExpHost(element); |
| return host != null ? host.isValidCategory(category) : myDefaultProvider.isValidCategory(category); |
| } |
| |
| @NotNull |
| public String[][] getAllKnownProperties(@NotNull final PsiElement element) { |
| final RegExpLanguageHost host = findRegExpHost(element); |
| return host != null ? host.getAllKnownProperties() : myDefaultProvider.getAllKnownProperties(); |
| } |
| |
| @Nullable |
| String getPropertyDescription(@NotNull final PsiElement element, @Nullable final String name) { |
| final RegExpLanguageHost host = findRegExpHost(element); |
| return host != null ? host.getPropertyDescription(name) : myDefaultProvider.getPropertyDescription(name); |
| } |
| |
| @NotNull |
| String[][] getKnownCharacterClasses(@NotNull final PsiElement element) { |
| final RegExpLanguageHost host = findRegExpHost(element); |
| return host != null ? host.getKnownCharacterClasses() : myDefaultProvider.getKnownCharacterClasses(); |
| } |
| } |