/*
* Copyright 2012-2014 Sergey Ignatov
*
* 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.erlang.marker;
import com.intellij.codeHighlighting.Pass;
import com.intellij.codeInsight.daemon.LineMarkerInfo;
import com.intellij.codeInsight.daemon.LineMarkerProvider;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.markup.GutterIconRenderer;
import com.intellij.openapi.project.DumbAware;
import com.intellij.psi.PsiDocumentManager;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiReference;
import com.intellij.util.FunctionUtil;
import com.intellij.util.containers.HashSet;
import org.intellij.erlang.icons.ErlangIcons;
import org.intellij.erlang.psi.ErlangFunction;
import org.intellij.erlang.psi.ErlangFunctionCallExpression;
import org.intellij.erlang.psi.ErlangFunctionWithArity;
import org.intellij.erlang.psi.impl.ErlangPsiImplUtil;
import org.jetbrains.annotations.NotNull;
import java.util.Collection;
import java.util.List;
import java.util.Set;
public class ErlangRecursiveCallLineMarkerProvider implements LineMarkerProvider, DumbAware {
@Override
public LineMarkerInfo getLineMarkerInfo(@NotNull PsiElement element) {
return null; //do nothing
}
@Override
public void collectSlowLineMarkers(@NotNull List<PsiElement> elements, @NotNull Collection<LineMarkerInfo> result) {
Set<Integer> lines = new HashSet<Integer>();
for (PsiElement element : elements) {
if (element instanceof ErlangFunctionCallExpression || element instanceof ErlangFunctionWithArity) {
PsiReference reference = element.getReference();
PsiElement resolve = reference != null ? reference.resolve() : null;
if (resolve instanceof ErlangFunction) {
if (ErlangPsiImplUtil.isRecursiveCall(element, (ErlangFunction) resolve)) {
PsiDocumentManager instance = PsiDocumentManager.getInstance(element.getProject());
Document document = instance.getDocument(element.getContainingFile());
int textOffset = element.getTextOffset();
if (document == null) continue;
int lineNumber = document.getLineNumber(textOffset);
if (!lines.contains(lineNumber)) {
result.add(new RecursiveMethodCallMarkerInfo(element));
}
lines.add(lineNumber);
}
}
}
}
}
private static class RecursiveMethodCallMarkerInfo extends LineMarkerInfo<PsiElement> {
private RecursiveMethodCallMarkerInfo(@NotNull PsiElement methodCall) {
super(methodCall,
methodCall.getTextRange(),
ErlangIcons.RECURSIVE_CALL,
Pass.UPDATE_OVERRIDEN_MARKERS,
FunctionUtil.<PsiElement, String>constant("Recursive call"),
null,
GutterIconRenderer.Alignment.RIGHT
);
}
}
}