/*
* Copyright 2013-2016 Sergey Ignatov, Alexander Zolotov, Florin Patan
*
* 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.goide.template;
import com.goide.psi.GoFieldDeclaration;
import com.intellij.codeInsight.lookup.LookupElement;
import com.intellij.codeInsight.lookup.LookupElementBuilder;
import com.intellij.codeInsight.template.*;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiNamedElement;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Collections;
import java.util.Set;
public class GoFieldNameMacro extends Macro {
@Override
public String getName() {
return "fieldName";
}
@Override
public String getPresentableName() {
return "fieldName()";
}
@Nullable
@Override
public Result calculateResult(@NotNull Expression[] params, ExpressionContext context) {
String name = ContainerUtil.getFirstItem(fieldNames(context));
return StringUtil.isNotEmpty(name) ? new TextResult(name) : null;
}
@Nullable
@Override
public LookupElement[] calculateLookupItems(@NotNull Expression[] params, ExpressionContext context) {
return ContainerUtil.map2Array(fieldNames(context), LookupElement.class, LookupElementBuilder::create);
}
@Override
public boolean isAcceptableInContext(TemplateContextType context) {
return context instanceof GoLiveTemplateContextType.Tag || context instanceof GoLiveTemplateContextType.TagLiteral;
}
private static Set<String> fieldNames(ExpressionContext context) {
PsiElement psiElement = context != null ? context.getPsiElementAtStartOffset() : null;
GoFieldDeclaration fieldDeclaration = PsiTreeUtil.getNonStrictParentOfType(psiElement, GoFieldDeclaration.class);
if (fieldDeclaration == null) {
return Collections.emptySet();
}
return ContainerUtil.map2LinkedSet(fieldDeclaration.getFieldDefinitionList(), PsiNamedElement::getName);
}
}