From cc767e026ec253c0d6468e81f9f1725c933bf37a Mon Sep 17 00:00:00 2001
From: Matt Ward <ward.matt@gmail.com>
Date: Mon, 18 Sep 2006 19:47:59 +0000
Subject: [PATCH] Fixed SD2-1061. Creating an XML schema from XML that had a
 child element with the same name as one of its parents failed due to a
 limitation of the .NET Framework's DataSet.InferXmlSchema method. Changed the
 code so it now uses the XmlSchemaInference class (new in .NET 2.0). This
 class handles multiple namespaces and will generate a schema for each
 namespace.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@1822 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61
---
 .../Project/Src/CreateSchemaCommand.cs        | 28 +++++++--------
 .../XmlEditor/Project/Src/XmlView.cs          | 36 ++++++++++++-------
 2 files changed, 36 insertions(+), 28 deletions(-)

diff --git a/src/AddIns/DisplayBindings/XmlEditor/Project/Src/CreateSchemaCommand.cs b/src/AddIns/DisplayBindings/XmlEditor/Project/Src/CreateSchemaCommand.cs
index 43843c1083..458d876ba1 100644
--- a/src/AddIns/DisplayBindings/XmlEditor/Project/Src/CreateSchemaCommand.cs
+++ b/src/AddIns/DisplayBindings/XmlEditor/Project/Src/CreateSchemaCommand.cs
@@ -32,11 +32,13 @@ namespace ICSharpCode.XmlEditor
 			XmlView xmlView = XmlView.ActiveXmlView;
 			if (xmlView != null) {
 				// Create a schema based on the xml.
-				string schema = xmlView.CreateSchema();
-				if (schema != null) {
-					// Create a new file and display the generated schema.
-					string fileName = GenerateSchemaFileName(xmlView.TextEditorControl.FileName);
-					OpenNewXmlFile(fileName, schema);
+				string[] schemas = xmlView.InferSchema();
+				if (schemas != null) {
+					// Create a new file for each generated schema.
+					for (int i = 0; i < schemas.Length; ++i) {
+						string fileName = GenerateSchemaFileName(xmlView.TextEditorControl.FileName, i + 1);
+						OpenNewXmlFile(fileName, schemas[i]);
+					}
 				}
 			}
 		}
@@ -50,22 +52,16 @@ namespace ICSharpCode.XmlEditor
 		}
 		
 		/// <summary>
-		/// Generates an xsd filename based on the name of the original xml
-		/// file.  If a file with the same name is already open in SharpDevelop
-		/// then a new name is generated (e.g. MyXml1.xsd).
+		/// Generates an xsd filename based on the name of the original xml file.
 		/// </summary>
-		string GenerateSchemaFileName(string xmlFileName)
+		string GenerateSchemaFileName(string xmlFileName, int count)
 		{
 			string baseFileName = Path.GetFileNameWithoutExtension(xmlFileName);
 			string schemaFileName = String.Concat(baseFileName, ".xsd");
-			
-			int count = 1;
-			while (FileService.IsOpen(schemaFileName)) {
-				schemaFileName = String.Concat(baseFileName, count.ToString(), ".xsd");
-				++count;
+			if (count == 1) {
+				return schemaFileName;
 			}
-			
-			return schemaFileName;
+			return schemaFileName = String.Concat(baseFileName, count.ToString(), ".xsd");
 		}
 	}
 }
diff --git a/src/AddIns/DisplayBindings/XmlEditor/Project/Src/XmlView.cs b/src/AddIns/DisplayBindings/XmlEditor/Project/Src/XmlView.cs
index 3251d3cc8a..a2c639f214 100644
--- a/src/AddIns/DisplayBindings/XmlEditor/Project/Src/XmlView.cs
+++ b/src/AddIns/DisplayBindings/XmlEditor/Project/Src/XmlView.cs
@@ -377,23 +377,17 @@ namespace ICSharpCode.XmlEditor
 		/// <summary>
 		/// Creates a schema based on the xml content.
 		/// </summary>
-		/// <returns>A generated schema or null if the xml content is not
+		/// <returns>A set of generated schemas or null if the xml content is not
 		/// well formed.</returns>
-		public string CreateSchema()
+		public string[] InferSchema()
 		{
 			TaskService.ClearExceptCommentTasks();
 			if (IsWellFormed) {
-				string schema;
-				using (DataSet dataSet = new DataSet()) {
-					dataSet.ReadXml(new StringReader(Text), XmlReadMode.InferSchema);
-					EncodedStringWriter writer = new EncodedStringWriter(xmlEditor.TextEditorProperties.Encoding);
-					XmlTextWriter xmlWriter = CreateXmlTextWriter(writer);
-					dataSet.WriteXmlSchema(xmlWriter);
-					schema = writer.ToString();
-					writer.Close();
-					xmlWriter.Close();
+				using (XmlTextReader reader = new XmlTextReader(new StringReader(Text))) {
+					XmlSchemaInference schemaInference = new XmlSchemaInference();
+					XmlSchemaSet schemaSet = schemaInference.InferSchema(reader);
+					return GetSchemas(schemaSet);
 				}
-				return schema;
 			} else {
 				ShowErrorList();
 			}
@@ -1282,5 +1276,23 @@ namespace ICSharpCode.XmlEditor
 			}
 			return null;
 		}
+		
+		/// <summary>
+		/// Converts a set of schemas to a string array, each array item 
+		/// contains the schema converted to a string.
+		/// </summary>
+		string[] GetSchemas(XmlSchemaSet schemaSet)
+		{
+			List<string> schemas = new List<string>();
+			foreach (XmlSchema schema in schemaSet.Schemas()) {
+				using (EncodedStringWriter writer = new EncodedStringWriter(xmlEditor.TextEditorProperties.Encoding)) {
+					using (XmlTextWriter xmlWriter = CreateXmlTextWriter(writer)) {
+						schema.Write(xmlWriter);
+						schemas.Add(writer.ToString());
+					}
+				}
+			}
+			return schemas.ToArray();
+		}
 	}
 }