From 45f7065022ec3014bdd442049e090b88a7f91e72 Mon Sep 17 00:00:00 2001
From: Sergey Ignatov <sergey.ignatov@jetbrains.com>
Date: Mon, 1 Dec 2014 14:54:38 +0300
Subject: [PATCH] avoid editor scrollbar stripes glitches, add extract resize
 listener

---
 .../editor/impl/EditorMarkupModelImpl.java    | 20 +++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/platform/platform-impl/src/com/intellij/openapi/editor/impl/EditorMarkupModelImpl.java b/platform/platform-impl/src/com/intellij/openapi/editor/impl/EditorMarkupModelImpl.java
index e84fbeab2b45..0c76cd41974a 100644
--- a/platform/platform-impl/src/com/intellij/openapi/editor/impl/EditorMarkupModelImpl.java
+++ b/platform/platform-impl/src/com/intellij/openapi/editor/impl/EditorMarkupModelImpl.java
@@ -512,6 +512,16 @@ public class EditorMarkupModelImpl extends MarkupModelImpl implements EditorMark
     private PopupHandler myHandler;
     private JButton myErrorStripeButton;
     @Nullable private BufferedImage myCachedTrack;
+    private ComponentAdapter myResizeListener = new ComponentAdapter() {
+      @Override
+      public void componentResized(ComponentEvent e) {
+        dropCache();
+      }
+    };
+
+    public void dropCache() {
+      myCachedTrack = null;
+    }
 
     @NotNull
     @Override
@@ -534,13 +544,15 @@ public class EditorMarkupModelImpl extends MarkupModelImpl implements EditorMark
     @Override
     public void installUI(JComponent c) {
       super.installUI(c);
-      myCachedTrack = null;
+      c.addComponentListener(myResizeListener);
+      dropCache();
     }
 
     @Override
     public void uninstallUI(@NotNull JComponent c) {
       super.uninstallUI(c);
-      myCachedTrack = null;
+      c.removeComponentListener(myResizeListener);
+      dropCache();
     }
 
     @Override
@@ -660,7 +672,7 @@ public class EditorMarkupModelImpl extends MarkupModelImpl implements EditorMark
 
       Rectangle componentBounds = c.getBounds();
       ProperTextRange docRange = ProperTextRange.create(0, (int)componentBounds.getHeight());
-      if (myCachedTrack == null || myCachedTrack.getHeight() != componentBounds.getHeight()) {
+      if (myCachedTrack == null) {
         myCachedTrack = UIUtil.createImage(componentBounds.width, componentBounds.height, BufferedImage.TYPE_INT_ARGB);
         myDirtyYPositions = docRange;
         paintTrackBasement(myCachedTrack.getGraphics(), new Rectangle(0, 0, componentBounds.width, componentBounds.height));
@@ -678,7 +690,7 @@ public class EditorMarkupModelImpl extends MarkupModelImpl implements EditorMark
           if (myDirtyYPositions == null) myDirtyYPositions = docRange;
           repaint(imageGraphics, componentBounds.width, myDirtyYPositions);
           myDirtyYPositions = null;
-          //c.repaint(); // because of model changing inside paintTrack, reschedule actual repaint with the right clip
+          c.repaint(); // because of model changing inside paintTrack, reschedule actual repaint with the right clip
         }
         finally {
           ((ApplicationImpl)ApplicationManager.getApplication()).editorPaintFinish();