JavaSliceProvider.java

/*
 * Copyright 2000-2016 JetBrains s.r.o.
 *
 * 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.intellij.slicer;

import com.intellij.ide.util.treeView.AbstractTreeStructure;
import com.intellij.openapi.actionSystem.DefaultActionGroup;
import com.intellij.psi.*;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class JavaSliceProvider implements SliceLanguageSupportProvider {
  @NotNull
  @Override
  public SliceUsage createRootUsage(@NotNull PsiElement element, @NotNull SliceAnalysisParams params) {
    return JavaSliceUsage.createRootUsage(element, params);
  }

  @Nullable
  @Override
  public PsiElement getExpressionAtCaret(PsiElement atCaret, boolean dataFlowToThis) {
    PsiElement element = PsiTreeUtil.getParentOfType(atCaret, PsiExpression.class, PsiVariable.class);
    if (dataFlowToThis && element instanceof PsiLiteralExpression) return null;
    return element;
  }

  @NotNull
  @Override
  public PsiElement getElementForDescription(@NotNull PsiElement element) {
    if (element instanceof PsiReferenceExpression) {
      PsiElement elementToSlice = ((PsiReferenceExpression)element).resolve();
      if (elementToSlice != null) {
        return elementToSlice;
      }
    }
    return element;
  }

  @NotNull
  @Override
  public SliceUsageCellRendererBase getRenderer() {
    return new SliceUsageCellRenderer();
  }

  @Override
  public void startAnalyzeLeafValues(@NotNull AbstractTreeStructure structure, @NotNull Runnable finalRunnable) {
    SliceLeafAnalyzer.startAnalyzeValues(structure, finalRunnable);
  }

  @Override
  public void startAnalyzeNullness(@NotNull AbstractTreeStructure structure, @NotNull Runnable finalRunnable) {
    SliceNullnessAnalyzer.startAnalyzeNullness(structure, finalRunnable);
  }

  @Override
  public void registerExtraPanelActions(@NotNull DefaultActionGroup actionGroup, @NotNull SliceTreeBuilder sliceTreeBuilder) {
    if (sliceTreeBuilder.dataFlowToThis) {
      actionGroup.add(new GroupByLeavesAction(sliceTreeBuilder));
      actionGroup.add(new CanItBeNullAction(sliceTreeBuilder));
    }
  }
}