| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * 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.android.tools.idea.lang.databinding; |
| |
| import com.intellij.openapi.util.TextRange; |
| import com.intellij.psi.InjectedLanguagePlaces; |
| import com.intellij.psi.LanguageInjector; |
| import com.intellij.psi.PsiLanguageInjectionHost; |
| import com.intellij.psi.xml.XmlAttributeValue; |
| import com.intellij.psi.xml.XmlTokenType; |
| import org.jetbrains.annotations.NotNull; |
| |
| import static com.android.SdkConstants.PREFIX_BINDING_EXPR; |
| |
| public class DbLanguageInjector implements LanguageInjector { |
| @Override |
| public void getLanguagesToInject(@NotNull PsiLanguageInjectionHost host, @NotNull InjectedLanguagePlaces injectionPlacesRegistrar) { |
| if (!(host instanceof XmlAttributeValue)) { |
| return; |
| } |
| String valueText = ((XmlAttributeValue)host).getValue(); |
| if (valueText.length() <= PREFIX_BINDING_EXPR.length() || !valueText.startsWith(PREFIX_BINDING_EXPR)) { |
| return; |
| } |
| // Parser only parses the expression, not the prefix '@{' or the suffix '}'. Extract the start/end index of the expression. |
| String unescapedValue = host.getText(); |
| int startIndex = unescapedValue.indexOf(PREFIX_BINDING_EXPR.charAt(0)) + PREFIX_BINDING_EXPR.length(); |
| int endIndex; |
| if (valueText.endsWith("}")) { |
| endIndex = unescapedValue.lastIndexOf('}'); |
| } else { |
| if (host.getNode().getLastChildNode().getElementType() == XmlTokenType.XML_ATTRIBUTE_VALUE_END_DELIMITER) { |
| endIndex = host.getLastChild().getStartOffsetInParent(); |
| } else { |
| endIndex = unescapedValue.length(); |
| } |
| } |
| injectionPlacesRegistrar.addPlace(DbLanguage.INSTANCE, TextRange.from(startIndex, endIndex-startIndex), null, null); |
| } |
| } |