CodeSnip Old Code (SVN)

--- a
+++ b/trunk/Src/UBrowseProtocol.pas
@@ -0,0 +1,103 @@
+{
+ * UBrowseProtocol.pas
+ *
+ * Implements a abstract base class for protocol handlers that access a URL
+ * using a TBrowseURL action.
+ *
+ * v1.0 of 04 Jul 2009  - Original version.
+ *
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ *
+ * Version: MPL 1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
+ * the specific language governing rights and limitations under the License.
+ *
+ * The Original Code is UBrowseProtocol.pas
+ *
+ * The Initial Developer of the Original Code is Peter Johnson
+ * (http://www.delphidabbler.com/).
+ *
+ * Portions created by the Initial Developer are Copyright (C) 2009 Peter
+ * Johnson. All Rights Reserved.
+ *
+ * ***** END LICENSE BLOCK *****
+}
+
+
+unit UBrowseProtocol;
+
+
+interface
+
+
+uses
+  // Project
+  UProtocols;
+
+
+type
+
+  {
+  TBrowseProtocol:
+    Abstract base class for protocol handlers that access a URL using a
+    TBrowseURL action.
+  }
+  TBrowseProtocol = class abstract(TProtocol)
+  public
+    class function SupportsProtocol(const URL: string): Boolean;
+      override; abstract;
+      {Checks if this protocol handler handles a URL's protocol.
+        @param URL [in] URL whose protocol is to be checked.
+        @return True if URL's protocol is supported, False if not.
+      }
+    function Execute: Boolean; override;
+      {Executes resource using a TBrowseAction to display URL in default
+      application for file type.
+        @return True.
+      }
+  end;
+
+
+implementation
+
+
+uses
+  // Delphi
+  SysUtils, ExtActns;
+
+
+{ TBrowseProtocol }
+
+function TBrowseProtocol.Execute: Boolean;
+  {Executes resource using shell to display URL in default application for file
+  type.
+    @return True.
+    @except EProtocol raised if an exception occurs in browse action.
+  }
+begin
+  // We execute the resource using an action
+  try
+    with TBrowseURL.Create(nil) do
+      try
+        URL := Self.URL;
+        Execute;
+        Result := True;
+      finally
+        Free;
+      end;
+  except
+    // any exceptions converted to EProtocol 
+    on E: Exception do
+      raise EProtocol.Create(E);
+  end;
+end;
+
+end.
+