This tutorial is meant to illustrate how the project tree structure view appearance can be modified programmatically. If you need to know more about basic concepts of a project view in IntelliJ-based IDEs, please refer to Exploring The Project Structure of IntelliJ IDEA Web Help.
To provide custom Structure View behaviour, implement TreeStructureProvider with nodes filtering logic in modify() method. The example below shows how to filter out all the Project View nodes except those which correspond to text files and directories.
// Copyright 2000-2020 JetBrains s.r.o. and other contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
package org.intellij.sdk.treeStructureProvider;
import com.intellij.ide.projectView.TreeStructureProvider;
import com.intellij.ide.projectView.ViewSettings;
import com.intellij.ide.projectView.impl.nodes.PsiFileNode;
import com.intellij.ide.util.treeView.AbstractTreeNode;
import com.intellij.openapi.fileTypes.PlainTextFileType;
import com.intellij.openapi.vfs.VirtualFile;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.ArrayList;
import java.util.Collection;
public class TextOnlyTreeStructureProvider implements TreeStructureProvider {
@NotNull
@Override
public Collection<AbstractTreeNode<?>> modify(@NotNull AbstractTreeNode<?> parent,
@NotNull Collection<AbstractTreeNode<?>> children,
ViewSettings settings) {
ArrayList<AbstractTreeNode<?>> nodes = new ArrayList<>();
for (AbstractTreeNode<?> child : children) {
if (child instanceof PsiFileNode) {
VirtualFile file = ((PsiFileNode) child).getVirtualFile();
if (file != null && !file.isDirectory() && !(file.getFileType() instanceof PlainTextFileType)) {
continue;
}
}
nodes.add(child);
}
return nodes;
}
@Nullable
@Override
public Object getData(@NotNull Collection<AbstractTreeNode<?>> selected, @NotNull String dataId) {
return null;
}
}
Compile and Run the Plugin
See Code Samples on how to set up and run the plugin.
After going through the steps described above you can see only text files and directories belonging to a project in the Project View.
