From de9ed4b2f88b2362fe67c2773d53aef2b5e218ed Mon Sep 17 00:00:00 2001
From: Dmitry Batrak <Dmitry.Batrak@jetbrains.com>
Date: Mon, 20 Feb 2017 16:40:54 +0300
Subject: [PATCH] IDEA-168452 Backspace does not change cursor position

handle bulk mode correctly (it's not possible to read caret position in bulk mode)
---
 .../openapi/wm/impl/status/PositionPanel.java | 22 ++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/platform/platform-impl/src/com/intellij/openapi/wm/impl/status/PositionPanel.java b/platform/platform-impl/src/com/intellij/openapi/wm/impl/status/PositionPanel.java
index 70cca110ea70..fdaacb9ac186 100644
--- a/platform/platform-impl/src/com/intellij/openapi/wm/impl/status/PositionPanel.java
+++ b/platform/platform-impl/src/com/intellij/openapi/wm/impl/status/PositionPanel.java
@@ -16,9 +16,12 @@
 package com.intellij.openapi.wm.impl.status;
 
 import com.intellij.ide.util.GotoLineNumberDialog;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.command.CommandProcessor;
 import com.intellij.openapi.editor.*;
 import com.intellij.openapi.editor.event.*;
+import com.intellij.openapi.editor.ex.DocumentBulkUpdateListener;
+import com.intellij.openapi.editor.ex.DocumentEx;
 import com.intellij.openapi.fileEditor.FileEditorManagerEvent;
 import com.intellij.openapi.fileEditor.ex.IdeDocumentHistory;
 import com.intellij.openapi.project.Project;
@@ -27,6 +30,7 @@ import com.intellij.openapi.wm.StatusBarWidget;
 import com.intellij.ui.UIBundle;
 import com.intellij.util.Alarm;
 import com.intellij.util.Consumer;
+import com.intellij.util.messages.MessageBusConnection;
 import org.jetbrains.annotations.NotNull;
 
 import javax.swing.*;
@@ -34,7 +38,8 @@ import java.awt.*;
 import java.awt.event.MouseEvent;
 
 public class PositionPanel extends EditorBasedWidget
-  implements StatusBarWidget.Multiframe, StatusBarWidget.TextPresentation, CaretListener, SelectionListener, DocumentListener {
+  implements StatusBarWidget.Multiframe, StatusBarWidget.TextPresentation,
+             CaretListener, SelectionListener, DocumentListener, DocumentBulkUpdateListener {
   private static final int CHAR_COUNT_SYNC_LIMIT = 500_000;
   private static final String CHAR_COUNT_UNKNOWN = "...";
 
@@ -111,6 +116,8 @@ public class PositionPanel extends EditorBasedWidget
     multicaster.addCaretListener(this, this);
     multicaster.addSelectionListener(this, this);
     multicaster.addDocumentListener(this, this);
+    MessageBusConnection connection = ApplicationManager.getApplication().getMessageBus().connect(this);
+    connection.subscribe(DocumentBulkUpdateListener.TOPIC, this);
   }
 
   @Override
@@ -140,6 +147,19 @@ public class PositionPanel extends EditorBasedWidget
   @Override
   public void documentChanged(DocumentEvent event) {
     Document document = event.getDocument();
+    if (document instanceof DocumentEx && ((DocumentEx)document).isInBulkUpdate()) return;
+    onDocumentUpdate(document);
+  }
+
+  @Override
+  public void updateStarted(@NotNull Document doc) {}
+
+  @Override
+  public void updateFinished(@NotNull Document doc) {
+    onDocumentUpdate(doc);
+  }
+
+  private void onDocumentUpdate(Document document) {
     Editor[] editors = EditorFactory.getInstance().getEditors(document);
     Component focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
     for (Editor editor : editors) {