editor: introduce API for StructureViewBuilder creation without FileEditor

Follow-up: 4bff20b5ba

GitOrigin-RevId: c589ce26e73426af36bd27051008d931845a6cf0

platform/analysis-api/src/com/intellij/openapi/fileEditor/ex/StructureViewFileEditorProvider.java

@@ -0,0 +1,17 @@
+// Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package com.intellij.openapi.fileEditor.ex;
+
+import com.intellij.ide.structureView.StructureViewBuilder;
+import com.intellij.openapi.fileEditor.FileEditor;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.VirtualFile;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * If {@link FileEditor} implements this interface it be used instead of
+ * creating a temp FileEditor just to call {@link FileEditor#getStructureViewBuilder()}.
+ */
+public interface StructureViewFileEditorProvider {
+  @Nullable StructureViewBuilder getStructureViewBuilder(@NotNull Project project, @NotNull VirtualFile file);
+}

platform/editor-ui-api/src/com/intellij/openapi/fileEditor/FileEditor.java

@@ -121,6 +121,9 @@ public interface FileEditor extends UserDataHolder, Disposable {
     return null;
   }
 
+  /**
+   * @see com.intellij.openapi.fileEditor.impl.text.StructureViewFileEditorProvider
+   */
   default @Nullable StructureViewBuilder getStructureViewBuilder() {
     return null;
   }

platform/lang-impl/src/com/intellij/ide/impl/StructureViewWrapperImpl.java

@@ -20,9 +20,9 @@ import com.intellij.openapi.fileEditor.FileEditor;
 import com.intellij.openapi.fileEditor.FileEditorManager;
 import com.intellij.openapi.fileEditor.FileEditorProvider;
 import com.intellij.openapi.fileEditor.ex.FileEditorProviderManager;
+import com.intellij.openapi.fileEditor.ex.StructureViewFileEditorProvider;
 import com.intellij.openapi.fileEditor.impl.EditorWindow;
 import com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl;
-import com.intellij.openapi.fileEditor.impl.text.TextEditorProvider;
 import com.intellij.openapi.module.Module;
 import com.intellij.openapi.module.ModuleType;
 import com.intellij.openapi.module.ModuleUtilCore;
@@ -470,8 +470,8 @@ public final class StructureViewWrapperImpl implements StructureViewWrapper, Dis
     List<FileEditorProvider> providers = FileEditorProviderManager.getInstance().getProviderList(myProject, file);
     FileEditorProvider provider = providers.size() == 0 ? null : providers.get(0);
     if (provider == null) return null;
-    if (provider instanceof TextEditorProvider) {
-      return StructureViewBuilder.PROVIDER.getStructureViewBuilder(file.getFileType(), file, myProject);
+    if (provider instanceof StructureViewFileEditorProvider) {
+      return ((StructureViewFileEditorProvider)provider).getStructureViewBuilder(myProject, file);
     }
 
     FileEditor editor = provider.createEditor(myProject, file);

platform/platform-impl/src/com/intellij/openapi/fileEditor/impl/text/TextEditorProvider.java

@@ -8,6 +8,7 @@ import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.editor.*;
 import com.intellij.openapi.editor.ex.util.EditorUtil;
 import com.intellij.openapi.fileEditor.*;
+import com.intellij.openapi.fileEditor.ex.StructureViewFileEditorProvider;
 import com.intellij.openapi.fileEditor.impl.DefaultPlatformFileEditorProvider;
 import com.intellij.openapi.fileTypes.BinaryFileTypeDecompilers;
 import com.intellij.openapi.fileTypes.FileType;
@@ -35,8 +36,11 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.Objects;
 
-public class TextEditorProvider
-  implements DefaultPlatformFileEditorProvider, TextBasedFileEditorProvider, QuickDefinitionProvider, DumbAware {
+public class TextEditorProvider implements DefaultPlatformFileEditorProvider,
+                                           TextBasedFileEditorProvider,
+                                           StructureViewFileEditorProvider,
+                                           QuickDefinitionProvider,
+                                           DumbAware {
   protected static final Logger LOG = Logger.getInstance(TextEditorProvider.class);
 
   private static final Key<TextEditor> TEXT_EDITOR_KEY = Key.create("textEditor");
@@ -277,6 +281,11 @@ public class TextEditorProvider
     });
   }
 
+  @Override
+  public @Nullable StructureViewBuilder getStructureViewBuilder(@NotNull Project project, @NotNull VirtualFile file) {
+    return StructureViewBuilder.PROVIDER.getStructureViewBuilder(file.getFileType(), file, project);
+  }
+
   protected class EditorWrapper extends UserDataHolderBase implements TextEditor {
     private final Editor myEditor;
 
@@ -312,7 +321,7 @@ public class TextEditorProvider
 
       final Project project = myEditor.getProject();
       if (project == null) return null;
-      return StructureViewBuilder.PROVIDER.getStructureViewBuilder(file.getFileType(), file, project);
+      return TextEditorProvider.this.getStructureViewBuilder(project, file);
     }
 
     @Override