Move the wxWebFileProtocolHandler from the IE backend to the common source, add the RegisterProtocol method to all classes (as a stub in GTK and OSX). Register the file protocol handler in the sample for testing purposes.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/SOC2011_WEBVIEW@68446 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/webview.h

@@ -21,6 +21,7 @@
 #include "wx/vector.h"
 
 class wxFSFile;
+class wxFileSystem;
 
 class WXDLLIMPEXP_WEB wxWebHistoryItem
 {
@@ -106,6 +107,7 @@ enum wxWebViewBackend
     wxWEB_VIEW_BACKEND_IE
 };
 
+//Base class for custom protocol handlers
 class WXDLLIMPEXP_WEB wxWebProtocolHandler
 {
 public:
@@ -114,6 +116,20 @@ public:
     virtual wxString CombineURIs(const wxString &baseuri, const wxString &newuri) = 0;
 };
 
+//Loads from uris such as file:///C:/example/example.html or archives such as
+//file:///C:/example/example.zip?protocol=zip;path=example.html 
+class WXDLLIMPEXP_WEB wxWebFileProtocolHandler : public wxWebProtocolHandler
+{
+public:
+    wxWebFileProtocolHandler();
+    virtual wxString GetProtocol() { return m_protocol; }
+    virtual wxFSFile* GetFile(const wxString &uri);
+    virtual wxString CombineURIs(const wxString &baseuri, const wxString &newuri);
+private:
+    wxString m_protocol;
+    wxFileSystem* m_fileSystem;
+};
+
 extern WXDLLIMPEXP_DATA_WEB(const char) wxWebViewNameStr[];
 extern WXDLLIMPEXP_DATA_WEB(const char) wxWebViewDefaultURLStr[];
 
@@ -343,6 +359,9 @@ public:
     virtual bool CanRedo() = 0;
     virtual void Undo() = 0;
     virtual void Redo() = 0;
+
+    //Virtual Filesystem Support
+    virtual void RegisterProtocol(wxWebProtocolHandler* handler) = 0;
 };
 
 class WXDLLIMPEXP_WEB wxWebNavigationEvent : public wxCommandEvent