From 232d48f0598561e1608d073aedfacd5ba3bae7fc Mon Sep 17 00:00:00 2001
From: Silenio Quarti
Date: Fri, 7 Dec 2012 11:22:42 -0500
Subject: Bug 395464 - Eclipse freezes when hovering over value in Variables
 view

---
 .../Eclipse SWT/win32/org/eclipse/swt/widgets/Composite.java  | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Composite.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Composite.java
index 60cb2cfc35..8bbaf163fa 100755
--- a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Composite.java	
+++ b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Composite.java	
@@ -53,6 +53,8 @@ public class Composite extends Scrollable {
 	Control [] tabList;
 	int layoutCount, backgroundMode;
 
+	static final int TOOLTIP_LIMIT = 4096;
+
 /**
  * Prevents uninitialized instances from being created outside the package.
  */
@@ -1846,6 +1848,15 @@ LRESULT wmNotify (NMHDR hdr, int /*long*/ wParam, int /*long*/ lParam) {
 				if (string != null) {
 					Shell shell = getShell ();
 					string = Display.withCrLf (string);
+					/*
+					* Bug in Windows.  On Windows 7, tool tips hang when displaying large
+					* strings. The fix is to limit the tool tip string to 4Kb.
+					*/
+					if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (6, 0)) {
+						if (string.length() > TOOLTIP_LIMIT) {
+							string = string.substring(0, TOOLTIP_LIMIT);
+						}
+					}
 					char [] chars = fixMnemonic (string);
 					
 					/*
-- 
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