From 7f4ea8209a5d92f2a2b2370925a41273d6dae6c5 Mon Sep 17 00:00:00 2001
From: teicher
Date: Wed, 9 Feb 2005 13:29:59 +0000
Subject: bug 82987 3.1 M4 can cause overview ruler to disappear forever

---
 .../text/EditorsPluginPreferenceInitializer.java    | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

(limited to 'org.eclipse.ui.editors/src/org/eclipse/ui/internal/editors/text/EditorsPluginPreferenceInitializer.java')

diff --git a/org.eclipse.ui.editors/src/org/eclipse/ui/internal/editors/text/EditorsPluginPreferenceInitializer.java b/org.eclipse.ui.editors/src/org/eclipse/ui/internal/editors/text/EditorsPluginPreferenceInitializer.java
index b36cefa1f81..e1a07639434 100644
--- a/org.eclipse.ui.editors/src/org/eclipse/ui/internal/editors/text/EditorsPluginPreferenceInitializer.java
+++ b/org.eclipse.ui.editors/src/org/eclipse/ui/internal/editors/text/EditorsPluginPreferenceInitializer.java
@@ -13,7 +13,10 @@ package org.eclipse.ui.internal.editors.text;
 
 import org.eclipse.core.runtime.preferences.AbstractPreferenceInitializer;
 
+import org.eclipse.jface.preference.IPreferenceStore;
+
 import org.eclipse.ui.editors.text.TextEditorPreferenceConstants;
+import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;
 
 
 /**
@@ -28,6 +31,22 @@ public class EditorsPluginPreferenceInitializer extends AbstractPreferenceInitia
 	 * @since 3.1
 	 */
 	public void initializeDefaultPreferences() {
-		TextEditorPreferenceConstants.initializeDefaultValues(EditorsPlugin.getDefault().getPreferenceStore());
+		IPreferenceStore store= EditorsPlugin.getDefault().getPreferenceStore();
+		TextEditorPreferenceConstants.initializeDefaultValues(store);
+		migrateOverviewRulerPreference(store);
+	}
+	
+	private void migrateOverviewRulerPreference(IPreferenceStore store) {
+		String preference= AbstractDecoratedTextEditorPreferenceConstants.EDITOR_OVERVIEW_RULER;
+		String postfix= "_migration"; //$NON-NLS-1$
+		String MIGRATED= "migrated_3.1"; //$NON-NLS-1$
+		String migrationKey= preference + postfix;
+		
+		String migrationValue= store.getString(migrationKey);
+		if (!MIGRATED.equals(migrationValue)) {
+			store.setValue(migrationKey, MIGRATED);
+			if (!store.getBoolean(preference))
+				store.setValue(preference, true);
+		}
 	}
 }
-- 
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