org.jboss.errai.idea.plugin.ui.completion.XmlDatafieldReference.java Source code

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Here is the source code for org.jboss.errai.idea.plugin.ui.completion.XmlDatafieldReference.java

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/*
 * Copyright 2013 Red Hat, Inc.
 *
 *    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.jboss.errai.idea.plugin.ui.completion;

import com.google.common.collect.Multimap;
import com.intellij.codeInsight.daemon.DaemonCodeAnalyzer;
import com.intellij.codeInsight.lookup.LookupElementBuilder;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiElementResolveResult;
import com.intellij.psi.PsiReferenceBase;
import com.intellij.psi.ResolveResult;
import com.intellij.psi.impl.source.xml.XmlAttributeImpl;
import com.intellij.psi.xml.XmlAttribute;
import com.intellij.psi.xml.XmlFile;
import com.intellij.util.IncorrectOperationException;
import org.jboss.errai.idea.plugin.ui.TemplateDataField;
import org.jboss.errai.idea.plugin.ui.TemplateUtil;
import org.jboss.errai.idea.plugin.ui.model.TemplateMetaData;
import org.jboss.errai.idea.plugin.util.AnnotationSearchResult;
import org.jboss.errai.idea.plugin.util.AnnotationValueElement;
import org.jboss.errai.idea.plugin.util.Types;
import org.jboss.errai.idea.plugin.util.Util;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

/**
 * @author Mike Brock
 */
public class XmlDatafieldReference extends PsiReferenceBase<PsiElement> {
    public XmlDatafieldReference(XmlAttribute element, boolean soft) {
        super(element, soft);
    }

    public static class DataFieldRef {
        private final String name;
        private final String fileName;

        public DataFieldRef(String name, String fileName) {
            this.name = name;
            this.fileName = fileName;
        }

        public String getName() {
            return name;
        }

        public String getFileName() {
            return fileName;
        }
    }

    private List<DataFieldRef> findLinkedTemplateAndDataFields() {
        final Project project = getElement().getProject();
        DaemonCodeAnalyzer.getInstance(project).restart();

        final XmlFile xmlFile = getXmlFile();
        final List<DataFieldRef> dataFieldRefs = new ArrayList<DataFieldRef>();
        final Multimap<String, TemplateDataField> allDataFieldTags = TemplateUtil.findAllDataFieldTags(xmlFile,
                xmlFile.getRootTag(), true);

        for (TemplateMetaData metaData : TemplateUtil.getTemplateOwners(xmlFile)) {
            final Collection<AnnotationSearchResult> allAnnotatedElements = Util
                    .findAllAnnotatedElements(metaData.getTemplateClass(), Types.DATAFIELD);

            for (String dataField : TemplateUtil.extractDataFieldList(allAnnotatedElements)) {
                if (allDataFieldTags.containsKey(dataField) || dataField.contains(Util.INTELLIJ_MAGIC_STRING))
                    continue;

                dataFieldRefs.add(new DataFieldRef(dataField, metaData.getTemplateClass().getQualifiedName()));
            }
        }

        return dataFieldRefs;
    }

    private XmlFile getXmlFile() {
        PsiElement el = getElement();
        while (!(el instanceof XmlFile) && el != null) {
            el = el.getParent();
        }
        return (XmlFile) el;
    }

    @Override
    public PsiElement handleElementRename(String newElementName) throws IncorrectOperationException {
        final PsiElement element = getElement();
        ((XmlAttributeImpl) element).setValue(newElementName);
        return element;
    }

    @Nullable
    @Override
    public PsiElement resolve() {
        final XmlFile xmlFile = getXmlFile();
        final Collection<TemplateMetaData> templateOwners = TemplateUtil.getTemplateOwners(xmlFile);
        for (TemplateMetaData metaData : templateOwners) {
            final Collection<AnnotationSearchResult> allAnnotatedElements = Util
                    .findAllAnnotatedElements(metaData.getTemplateClass(), Types.DATAFIELD);
            for (AnnotationSearchResult element : allAnnotatedElements) {
                final AnnotationValueElement annotationValueElement = Util
                        .getValueStringFromAnnotationWithDefault(element.getAnnotation());
                if (annotationValueElement.getValue().equals(((XmlAttribute) getElement()).getValue())) {
                    return annotationValueElement.getLogicalElement();
                }
            }
        }

        return null;
    }

    @NotNull
    @Override
    public Object[] getVariants() {
        List<Object> results = new ArrayList<Object>();
        for (DataFieldRef ref : findLinkedTemplateAndDataFields()) {
            results.add(LookupElementBuilder.create(ref.getName()).withTypeText(ref.getFileName(), true));
        }
        return results.toArray();
    }
}