handle SearchPatternException in SearchAndReplacePanel

src/AddIns/Misc/SearchAndReplace/Project/Gui/SearchAndReplacePanel.cs

@@ -85,44 +85,55 @@ namespace SearchAndReplace
 		
 		void FindNextButtonClicked(object sender, EventArgs e)
 		{
+			try {
 				WritebackOptions();
 				var location = new SearchLocation(SearchOptions.SearchTarget, SearchOptions.LookIn, SearchOptions.LookInFiletypes, SearchOptions.IncludeSubdirectories, SearchOptions.SearchTarget == SearchTarget.CurrentSelection ? SearchManager.GetActiveSelection(true) : null);
 				var strategy = SearchStrategyFactory.Create(SearchOptions.FindPattern, !SearchOptions.MatchCase, SearchOptions.MatchWholeWord, SearchOptions.SearchMode);
 				lastMatch = SearchManager.FindNext(strategy, location);
 				SearchManager.SelectResult(lastMatch);
 				Focus();
+			} catch (SearchPatternException ex) {
+				MessageService.ShowError(ex.Message);
+			}
 		}
 		
 		void FindAllButtonClicked(object sender, EventArgs e)
 		{
 			WritebackOptions();
-			var monitor = WorkbenchSingleton.StatusBar.CreateProgressMonitor();
+			using (var monitor = WorkbenchSingleton.StatusBar.CreateProgressMonitor()) {
 				monitor.TaskName = StringParser.Parse("${res:AddIns.SearchReplace.SearchProgressTitle}");
 				try {
 					var location = new SearchLocation(SearchOptions.SearchTarget, SearchOptions.LookIn, SearchOptions.LookInFiletypes, SearchOptions.IncludeSubdirectories, SearchOptions.SearchTarget == SearchTarget.CurrentSelection ? SearchManager.GetActiveSelection(false) : null);
 					var strategy = SearchStrategyFactory.Create(SearchOptions.FindPattern, !SearchOptions.MatchCase, SearchOptions.MatchWholeWord, SearchOptions.SearchMode);
 					var results = SearchManager.FindAllParallel(strategy, location, monitor);
 					SearchManager.ShowSearchResults(SearchOptions.FindPattern, results);
+				} catch (SearchPatternException ex) {
+					MessageService.ShowError(ex.Message);
 				} catch (OperationCanceledException) {}
 			}
+		}
 		
 		void BookmarkAllButtonClicked(object sender, EventArgs e)
 		{
 			WritebackOptions();
-			var monitor = WorkbenchSingleton.StatusBar.CreateProgressMonitor();
+			using (var monitor = WorkbenchSingleton.StatusBar.CreateProgressMonitor()) {
 				monitor.TaskName = StringParser.Parse("${res:AddIns.SearchReplace.SearchProgressTitle}");
 				try {
 					var location = new SearchLocation(SearchOptions.SearchTarget, SearchOptions.LookIn, SearchOptions.LookInFiletypes, SearchOptions.IncludeSubdirectories, SearchOptions.SearchTarget == SearchTarget.CurrentSelection ? SearchManager.GetActiveSelection(false) : null);
 					var strategy = SearchStrategyFactory.Create(SearchOptions.FindPattern, !SearchOptions.MatchCase, SearchOptions.MatchWholeWord, SearchOptions.SearchMode);
 					var results = SearchManager.FindAllParallel(strategy, location, monitor);
 					SearchManager.MarkAll(results);
+				} catch (SearchPatternException ex) {
+					MessageService.ShowError(ex.Message);
 				} catch (OperationCanceledException) {}
 			}
+		}
 		
 		void ReplaceAllButtonClicked(object sender, EventArgs e)
 		{
 			WritebackOptions();
 			int count = -1;
+			try {
 				AsynchronousWaitDialog.RunInCancellableWaitDialog(
 					StringParser.Parse("${res:AddIns.SearchReplace.SearchProgressTitle}"), null,
 					monitor => {
@@ -133,10 +144,14 @@ namespace SearchAndReplace
 					});
 				if (count != -1)
 					SearchManager.ShowReplaceDoneMessage(count);
+			} catch (SearchPatternException ex) {
+				MessageService.ShowError(ex.Message);
+			}
 		}
 		
 		void ReplaceButtonClicked(object sender, EventArgs e)
 		{
+			try {
 				WritebackOptions();
 				if (SearchManager.IsResultSelected(lastMatch))
 					SearchManager.Replace(lastMatch, SearchOptions.ReplacePattern);
@@ -145,6 +160,9 @@ namespace SearchAndReplace
 				lastMatch = SearchManager.FindNext(strategy, location);
 				SearchManager.SelectResult(lastMatch);
 				Focus();
+			} catch (SearchPatternException ex) {
+				MessageService.ShowError(ex.Message);
+			}
 		}
 		
 		void WritebackOptions()