From f3ea33a522b45a73219ea01561510fef52a66c20 Mon Sep 17 00:00:00 2001
From: Rajko Winkler <rajko.winkler@gmail.com>
Date: Wed, 16 Dec 2015 15:54:48 +0100
Subject: [PATCH] The last XPath query is being persisted and can be reused
 with the next query.

---
 src/features/xmlXPathEngine.ts | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/features/xmlXPathEngine.ts b/src/features/xmlXPathEngine.ts
index 237ac5f..edaea0a 100644
--- a/src/features/xmlXPathEngine.ts
+++ b/src/features/xmlXPathEngine.ts
@@ -9,7 +9,8 @@ let resultChannel: OutputChannel = null;
 export function evaluateXPath(editor: TextEditor, edit: TextEditorEdit): void {
 	window.showInputBox({
 		placeHolder: 'XPath Query',
-		prompt: 'Please enter an XPath query to evaluate.'
+		prompt: 'Please enter an XPath query to evaluate.',
+		value: Singleton.getXPathValue()
 		
 	}).then((query) => {
 		if (query === undefined) return;
@@ -17,6 +18,8 @@ export function evaluateXPath(editor: TextEditor, edit: TextEditorEdit): void {
 		let xml = editor.document.getText();
 		let doc = new dom().parseFromString(xml);
 		
+		Singleton.setXPathValue(query);
+		
 		try {
 			var nodes = xpath.select(query, doc);
 		}
@@ -42,4 +45,22 @@ export function evaluateXPath(editor: TextEditor, edit: TextEditorEdit): void {
 		
 		resultChannel.show(ViewColumn.Three);
 	});
+}
+
+namespace Singleton {
+	
+	class XPathContext 
+	{
+		static _lastXPathValue:string = '';
+	}
+		
+    export function getXPathValue():string
+	{ 
+		 return XPathContext._lastXPathValue;
+	}
+	
+	export function setXPathValue(val:string):void 
+	{ 
+		 XPathContext._lastXPathValue = val;
+	}
 }
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