don't take write actions for modifying TextComponentEditor

platform/platform-api/src/com/intellij/openapi/editor/actionSystem/EditorWriteActionHandler.java

@@ -19,6 +19,7 @@ import com.intellij.openapi.actionSystem.CommonDataKeys;
 import com.intellij.openapi.actionSystem.DataContext;
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.editor.*;
+import com.intellij.openapi.editor.textarea.TextComponentEditor;
 import com.intellij.openapi.fileEditor.FileDocumentManager;
 import com.intellij.openapi.project.Project;
 import org.jetbrains.annotations.Nullable;
@@ -46,7 +47,7 @@ public abstract class EditorWriteActionHandler extends EditorActionHandler {
       if (project != null && !FileDocumentManager.getInstance().requestWriting(editor.getDocument(), project)) return;
     }
 
-    ApplicationManager.getApplication().runWriteAction(new DocumentRunnable(editor.getDocument(),editor.getProject()) {
+    DocumentRunnable runnable = new DocumentRunnable(editor.getDocument(), editor.getProject()) {
       @Override
       public void run() {
         final Document doc = editor.getDocument();
@@ -62,7 +63,12 @@ public abstract class EditorWriteActionHandler extends EditorActionHandler {
           doc.stopGuardedBlockChecking();
         }
       }
-    });
+    };
+    if (editor instanceof TextComponentEditor) {
+      runnable.run();
+    } else {
+      ApplicationManager.getApplication().runWriteAction(runnable);
+    }
   }
 
   /**

platform/platform-api/src/com/intellij/openapi/editor/textarea/TextComponentEditor.java

@@ -0,0 +1,28 @@
+/*
+ * 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.openapi.editor.textarea;
+
+import com.intellij.openapi.editor.Editor;
+
+import javax.swing.text.Document;
+
+/**
+ * An implementation of {@link Editor} on top of a plain {@link javax.swing.text.JTextComponent}.
+ * The corresponding document ({@link #getDocument()}) is a wrapper over Swing {@link Document} and
+ * doesn't require write action for modifications.
+ */
+public interface TextComponentEditor extends Editor {
+}

platform/platform-impl/src/com/intellij/openapi/editor/actions/KillRingSaveAction.java

@@ -21,6 +21,7 @@ import com.intellij.openapi.editor.DocumentRunnable;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.editor.SelectionModel;
 import com.intellij.openapi.editor.actionSystem.EditorActionHandler;
+import com.intellij.openapi.editor.textarea.TextComponentEditor;
 import com.intellij.openapi.ide.KillRingTransferable;
 
 /**
@@ -61,13 +62,18 @@ public class KillRingSaveAction extends TextComponentEditorAction {
       }
       KillRingUtil.copyToKillRing(editor, start, end, false);
       if (myRemove) {
-        ApplicationManager.getApplication().runWriteAction(new DocumentRunnable(editor.getDocument(),editor.getProject()) {
+        DocumentRunnable runnable = new DocumentRunnable(editor.getDocument(), editor.getProject()) {
           @Override
           public void run() {
             editor.getDocument().deleteString(start, end);
           }
-        });
-      } 
+        };
+        if (editor instanceof TextComponentEditor) {
+          runnable.run();
+        } else {
+          ApplicationManager.getApplication().runWriteAction(runnable);
+        }
+      }
     }
   }
 }

platform/platform-impl/src/com/intellij/openapi/editor/actions/TextComponentEditorAction.java

@@ -21,7 +21,7 @@ import com.intellij.openapi.actionSystem.PlatformDataKeys;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.editor.actionSystem.EditorAction;
 import com.intellij.openapi.editor.actionSystem.EditorActionHandler;
-import com.intellij.openapi.editor.textarea.TextComponentEditor;
+import com.intellij.openapi.editor.textarea.TextComponentEditorImpl;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -47,7 +47,7 @@ public abstract class TextComponentEditorAction extends EditorAction {
     if (editor != null) return editor;
     final Object data = PlatformDataKeys.CONTEXT_COMPONENT.getData(dataContext);
     if (data instanceof JTextComponent) {
-      return new TextComponentEditor(CommonDataKeys.PROJECT.getData(dataContext), (JTextComponent) data);
+      return new TextComponentEditorImpl(CommonDataKeys.PROJECT.getData(dataContext), (JTextComponent) data);
     }
     return null;
   }

platform/platform-impl/src/com/intellij/openapi/editor/textarea/TextComponentEditorImpl.java

@@ -37,7 +37,7 @@ import java.awt.event.MouseEvent;
 /**
  * @author yole
  */
-public class TextComponentEditor extends UserDataHolderBase implements Editor {
+public class TextComponentEditorImpl extends UserDataHolderBase implements TextComponentEditor {
   private final Project myProject;
   private final JTextComponent myTextComponent;
   private final TextComponentDocument myDocument;
@@ -48,7 +48,7 @@ public class TextComponentEditor extends UserDataHolderBase implements Editor {
   private final TextComponentFoldingModel myFoldingModel;
   private EditorSettings mySettings;
 
-  public TextComponentEditor(final Project project, @NotNull JTextComponent textComponent) {
+  public TextComponentEditorImpl(final Project project, @NotNull JTextComponent textComponent) {
     myProject = project;
     myTextComponent = textComponent;
     if (textComponent instanceof JTextArea) {