From 721f50cc37f91095cedf1acfe63c88bdfc38b4f7 Mon Sep 17 00:00:00 2001
From: Josh Johnson <josh@fyrelogic.com>
Date: Thu, 7 Jan 2016 11:19:29 -0500
Subject: [PATCH] Add XPath History Cleanup

---
 src/Extension.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Extension.ts b/src/Extension.ts
index df1e1f3..622e72b 100644
--- a/src/Extension.ts
+++ b/src/Extension.ts
@@ -8,6 +8,7 @@ export var GlobalState: vsc.Memento;
 export var WorkspaceState: vsc.Memento;
 
 const LANG_XML: string = 'xml';
+const MEM_QUERY_HISTORY: string = 'xpathQueryHistory';
 
 export function activate(ctx: vsc.ExtensionContext) {
     // expose global and workspace state to the entire extension
@@ -26,4 +27,12 @@ export function activate(ctx: vsc.ExtensionContext) {
         vsc.languages.registerDocumentFormattingEditProvider(LANG_XML, new XmlDocumentFormattingEditProvider()),
         vsc.languages.registerDocumentRangeFormattingEditProvider(LANG_XML, new XmlRangeFormattingEditProvider())
     );
+}
+
+export function deactivate() {
+    // clean up xpath history
+    let memento: vsc.Memento = WorkspaceState || GlobalState;
+    let history = memento.get<any[]>(MEM_QUERY_HISTORY, []);
+    history.splice(0);
+    memento.update(MEM_QUERY_HISTORY, history);
 }
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