GherkinStructureViewFactory.java

package org.jetbrains.plugins.cucumber.psi.structure;

import com.intellij.ide.structureView.StructureViewBuilder;
import com.intellij.ide.structureView.StructureViewModel;
import com.intellij.ide.structureView.StructureViewModelBase;
import com.intellij.ide.structureView.TreeBasedStructureViewBuilder;
import com.intellij.lang.PsiStructureViewFactory;
import com.intellij.openapi.editor.Editor;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.plugins.cucumber.psi.GherkinFeature;
import org.jetbrains.plugins.cucumber.psi.GherkinFile;
import org.jetbrains.plugins.cucumber.psi.GherkinStep;
import org.jetbrains.plugins.cucumber.psi.GherkinStepsHolder;

/**
 * @author yole
 */
public class GherkinStructureViewFactory implements PsiStructureViewFactory {
  @Override
  public StructureViewBuilder getStructureViewBuilder(@NotNull final PsiFile psiFile) {
    return new TreeBasedStructureViewBuilder() {
      @NotNull
      @Override
      public StructureViewModel createStructureViewModel(@Nullable Editor editor) {
        PsiElement root = PsiTreeUtil.getChildOfType(psiFile, GherkinFeature.class);
        if (root == null) {
          root = psiFile;
        }
        return
          new StructureViewModelBase(psiFile, editor, new GherkinStructureViewElement(root))
               .withSuitableClasses(GherkinFile.class, GherkinFeature.class, GherkinStepsHolder.class, GherkinStep.class);
      }
    };
  }
}