Resolve "Structure View Support"

Closes #3 (closed)

src/main/java/org/jastadd/tooling/aspect/psi/impl/JastAddAspectAspectDeclarationImplExtension.java

+package org.jastadd.tooling.aspect.psi.impl;
+
+import com.intellij.lang.ASTNode;
+import com.intellij.navigation.ItemPresentation;
+import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.fileEditor.FileDocumentManager;
+import com.intellij.psi.PsiElement;
+import org.jastadd.tooling.aspect.psi.AspectElementFactory;
+import org.jastadd.tooling.aspect.psi.JastAddAspectAspectDeclaration;
+import org.jastadd.tooling.aspect.psi.JastAddAspectAspectName;
+import org.jastadd.tooling.grammar.psi.GrammarNamedElement;
+import org.jastadd.tooling.grammar.psi.impl.GrammarNamedElementImpl;
+import org.jastadd.tooling.util.JastAddIcons;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import javax.swing.*;
+
+public class JastAddAspectAspectDeclarationImplExtension extends GrammarNamedElementImpl implements GrammarNamedElement {
+
+  public JastAddAspectAspectDeclarationImplExtension(@NotNull ASTNode node) {
+    super(node);
+  }
+
+  public String getName() {
+    return getNameIdentifier().getText();
+  }
+
+  public PsiElement setName(@NotNull String newName) {
+    ASTNode identifierNode = getNameIdentifier().getNode().getFirstChildNode();
+    if (identifierNode != null) {
+      JastAddAspectAspectDeclaration name = AspectElementFactory.createAspectDeclaration(getProject(), newName);
+      assert name != null; // we know the name is not null because we always create the same one
+      ASTNode newNameIdentifierNode = name.getAspectName().getNode().getFirstChildNode();
+      getNameIdentifier().getNode().replaceChild(identifierNode, newNameIdentifierNode);
+    }
+    return this;
+  }
+
+  @Override
+  @NotNull
+  public JastAddAspectAspectName getNameIdentifier() {
+    return ((JastAddAspectAspectDeclaration) getNode().getPsi()).getAspectName();
+  }
+
+  @Override
+  public ItemPresentation getPresentation() {
+    return new ItemPresentation() {
+      @Nullable
+      @Override
+      public String getPresentableText() {
+        return "aspect " + getName();
+      }
+
+      @Override
+      public String getLocationString() {
+        Document document = FileDocumentManager.getInstance().getDocument(getNode().getPsi().getContainingFile().getVirtualFile());
+        return document != null ? "l." + document.getLineNumber(getTextRange().getStartOffset() + 1) : "";
+      }
+
+      @Override
+      public Icon getIcon(boolean unused) {
+        return JastAddIcons.FILE;
+      }
+    };
+  }
+}