/*
* Copyright 2011-2014 Gregory Shrago
*
* 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.grammar;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.ElementDescriptionLocation;
import com.intellij.psi.ElementDescriptionProvider;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiNamedElement;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.usageView.UsageViewNodeTextLocation;
import com.intellij.usageView.UsageViewShortNameLocation;
import com.intellij.usageView.UsageViewTypeLocation;
import org.apache.xmlbeans.impl.common.NameUtil;
import org.intellij.grammar.psi.BnfAttr;
import org.intellij.grammar.psi.BnfCompositeElement;
import org.intellij.grammar.psi.BnfRule;
import org.jetbrains.annotations.NotNull;
/**
* @author gregory
* Date: 17.07.11 18:46
*/
public class BnfDescriptionProvider implements ElementDescriptionProvider {
@Override
public String getElementDescription(@NotNull PsiElement psiElement, @NotNull ElementDescriptionLocation location) {
if (location == UsageViewNodeTextLocation.INSTANCE && psiElement instanceof BnfCompositeElement) {
return getElementDescription(psiElement, UsageViewTypeLocation.INSTANCE) + " " +
"'" + getElementDescription(psiElement, UsageViewShortNameLocation.INSTANCE) + "'";
}
if (psiElement instanceof BnfRule) {
if (location == UsageViewTypeLocation.INSTANCE) {
return "Grammar Rule";
}
return ((BnfRule)psiElement).getId().getText();
}
else if (psiElement instanceof BnfAttr) {
if (location == UsageViewTypeLocation.INSTANCE) {
BnfRule rule = PsiTreeUtil.getParentOfType(psiElement, BnfRule.class);
return (rule == null ? "Grammar " : "Rule ") + "Attribute";
}
return ((BnfAttr)psiElement).getId().getText();
}
else if (psiElement instanceof BnfCompositeElement) {
if (location == UsageViewTypeLocation.INSTANCE) {
return StringUtil.join(NameUtil.splitWords(psiElement.getNode().getElementType().toString(), false), " ");
}
return psiElement instanceof PsiNamedElement? ((PsiNamedElement) psiElement).getName() : psiElement.getClass().getSimpleName();
}
return null;
}
}