From 429fd1dec67b73911e837db645f91b49111667bf Mon Sep 17 00:00:00 2001
From: Nadya Zabrodina <Nadya.Zabrodina@jetbrains.com>
Date: Mon, 13 Apr 2015 17:22:40 +0400
Subject: [PATCH] IDEA-138180 Push Dialog: last target is invisible (if it has
 no commits to push) * scroll bar sometimes doesn't appear when needed, and
 only a part of last commit is visible->collapse and re-expand or resize 
 helps

---
 .../com/intellij/dvcs/push/ui/PushLog.java    | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/platform/dvcs-impl/src/com/intellij/dvcs/push/ui/PushLog.java b/platform/dvcs-impl/src/com/intellij/dvcs/push/ui/PushLog.java
index d223306b9858..5de0142324d8 100644
--- a/platform/dvcs-impl/src/com/intellij/dvcs/push/ui/PushLog.java
+++ b/platform/dvcs-impl/src/com/intellij/dvcs/push/ui/PushLog.java
@@ -29,6 +29,7 @@ import com.intellij.openapi.vcs.changes.ui.EditSourceForDialogAction;
 import com.intellij.openapi.vcs.history.VcsRevisionNumber;
 import com.intellij.ui.*;
 import com.intellij.ui.components.JBScrollPane;
+import com.intellij.ui.components.JBViewport;
 import com.intellij.ui.components.labels.LinkLabel;
 import com.intellij.ui.components.labels.LinkListener;
 import com.intellij.util.ArrayUtil;
@@ -233,6 +234,10 @@ public class PushLog extends JPanel implements DataProvider {
         }
       }
     };
+    if (syncStrategyPanel != null) {
+      myScrollPane.setViewport(new MyTreeViewPort(myTree, syncStrategyPanel.getPreferredSize().height));
+    }
+    myScrollPane.getViewport().setScrollMode(JViewport.SIMPLE_SCROLL_MODE);
     myScrollPane.setOpaque(false);
     if (syncStrategyPanel != null) {
       myScrollPane.add(syncStrategyPanel);
@@ -653,6 +658,23 @@ public class PushLog extends JPanel implements DataProvider {
       };
     }
   }
+
+  private static class MyTreeViewPort extends JBViewport {
+
+    final int myHeightToReduce;
+
+    public MyTreeViewPort(@Nullable Component view, int heightToReduce) {
+      super();
+      setView(view);
+      myHeightToReduce = heightToReduce;
+    }
+
+    @Override
+    public Dimension getExtentSize() {
+      Dimension defaultSize = super.getExtentSize();
+      return new Dimension(defaultSize.width, defaultSize.height - myHeightToReduce);
+    }
+  }
 }