Package org.intellij.erlang.navigation

Source Code of org.intellij.erlang.navigation.ErlangNavigationUtil

/*
* 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.navigation;

import com.intellij.navigation.ItemPresentation;
import com.intellij.psi.NavigatablePsiElement;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiReference;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.util.containers.ContainerUtil;
import org.intellij.erlang.icons.ErlangIcons;
import org.intellij.erlang.psi.*;
import org.intellij.erlang.psi.impl.ErlangCompositeElementImpl;
import org.intellij.erlang.psi.impl.ErlangPsiImplUtil;
import org.jetbrains.annotations.Nullable;

import javax.swing.*;
import java.util.LinkedList;
import java.util.List;

public class ErlangNavigationUtil {

  private ErlangNavigationUtil() {
  }

  public static List<ErlangCallbackSpec> getCallbackSpecs(ErlangFunction function) {
    PsiFile file = function.getContainingFile();

    List<ErlangCallbackSpec> callbackSpecs = new LinkedList<ErlangCallbackSpec>();

    String fullName = ErlangPsiImplUtil.createFunctionPresentation(function);
    if (file instanceof ErlangFile) {
      List<ErlangBehaviour> behaviours = ((ErlangFile) file).getBehaviours();
      for (ErlangBehaviour behaviour : behaviours) {
        ErlangModuleRef moduleRef = behaviour.getModuleRef();
        PsiReference reference = moduleRef != null ? moduleRef.getReference() : null;
        PsiElement resolve = reference != null ? reference.resolve() : null;
        PsiFile containingFile = resolve != null ? resolve.getContainingFile() : null;

        ErlangCallbackSpec callbackSpec = containingFile instanceof ErlangFile ? ((ErlangFile) containingFile).getCallbackByName(fullName) : null;
        ContainerUtil.addIfNotNull(callbackSpecs, callbackSpec);
      }
    }
    return callbackSpecs;
  }

  @Nullable
  public static NavigatablePsiElement getNavigatableSpecFun(final String presentation, PsiElement callbackSpec) {
    ErlangSpecFun specFun = PsiTreeUtil.findChildOfType(callbackSpec, ErlangSpecFun.class);

    if (specFun == null) return null;

    return new ErlangCompositeElementImpl(specFun.getNode()) {
      @Override
      public ItemPresentation getPresentation() {
        return new ItemPresentation() {
          @Nullable
          @Override
          public String getPresentableText() {
            return presentation;
          }

          @Nullable
          @Override
          public String getLocationString() {
            return getContainingFile().getName();
          }

          @Nullable
          @Override
          public Icon getIcon(boolean unused) {
            return ErlangIcons.CALLBACK;
          }
        };
      }

      @Nullable
      @Override
      public Icon getIcon(int flags) {
        return ErlangIcons.CALLBACK;
      }
    };
  }
}
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