Word Export: Support magic ws styles

When we are creating references to writing styles, don’t add
a language tag to the style if it is a magic ws.
When we are creating the style, don’t create a ws specific style
for a magic ws.

Change-Id: If7c8bc484dda67b03c00431aaa24676af6553ddf

Src/xWorks/LcmWordGenerator.cs

@@ -341,9 +341,12 @@ public static string GetWsStyleName(string styleName, ConfigurableDictionaryNode
 					{
 						if (opt.IsEnabled)
 						{
-							if (opt.Id == "vernacular" || opt.Id == "all vernacular")
+							// If it's magic then don't return a language tag specific style.
+							var possiblyMagic = WritingSystemServices.GetMagicWsIdFromName(opt.Id);
+							if (possiblyMagic != 0)
+							{
 								return styleName;
-
+							}
 							// else, the DictionaryNodeOption Id specifies a particular writing system
 							// if there is no base style, return just the ws style
 							if (styleName == null)

Src/xWorks/WordStylesGenerator.cs

@@ -460,20 +460,25 @@ private static Style GenerateWordStyleFromWsOptions(ConfigurableDictionaryNode c
 			var cache = propertyTable.GetValue<LcmCache>("cache");
 			foreach (var ws in wsOptions.Options.Where(opt => opt.IsEnabled))
 			{
-				var possiblyMagic = WritingSystemServices.GetMagicWsIdFromName(ws.Id);
-				// if the writing system isn't a magic name just use it otherwise find the right one from the magic list
-				var wsIdString = possiblyMagic == 0 ? ws.Id : WritingSystemServices.GetWritingSystemList(cache, possiblyMagic, true).First().Id;
-				var wsId = cache.LanguageWritingSystemFactoryAccessor.GetWsFromStr(wsIdString);
-				var wsString = GetWsString(wsIdString).Trim('.');
-
 				var wsStyle = new Style();
 
+				// If it's magic then don't add a specific style for the language tag.
+				var possiblyMagic = WritingSystemServices.GetMagicWsIdFromName(ws.Id);
+				if (possiblyMagic != 0)
+				{
+					return wsStyle;
+				}
+
 				if (!string.IsNullOrEmpty(configNode.Style))
+				{
+					var wsId = cache.LanguageWritingSystemFactoryAccessor.GetWsFromStr(ws.Id);
 					wsStyle = GenerateWordStyleFromLcmStyleSheet(configNode.Style, wsId, propertyTable);
+				}
 
 				// Any given style can only be based on one style.
 				// This style should be based on the span for the current ws;
 				// style info for the current node (independent of WS) should be added during creation of this style.
+				var wsString = GetWsString(ws.Id).Trim('.');
 				wsStyle.Append(new BasedOn() { Val = "span" + wsString });
 
 				wsStyle.StyleId = configNode.Style + wsString;