don't pass NULL pointer to printf(), this crashes Solaris printf

[wxWidgets.git] / include / wx / mimetype.h

diff --git a/include/wx/mimetype.h b/include/wx/mimetype.h
index fb8e884cf3356b15663241a21772e705262d2a3d..e403c1728ee79d901be79ff93b17c83007add090 100644 (file)
--- a/include/wx/mimetype.h
+++ b/include/wx/mimetype.h
@@ -3,36 +3,169 @@
 // Purpose:     classes and functions to manage MIME types
 // Author:      Vadim Zeitlin
 // Modified by:
 // Purpose:     classes and functions to manage MIME types
 // Author:      Vadim Zeitlin
 // Modified by:

+//  Chris Elliott (biol75@york.ac.uk) 5 Dec 00: write support for Win32

 // Created:     23.09.98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
 // Created:     23.09.98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>

-// Licence:     wxWindows license (part of wxExtra library)
+// Licence:     wxWindows licence (part of wxExtra library)

 /////////////////////////////////////////////////////////////////////////////
 
 /////////////////////////////////////////////////////////////////////////////
 

-#ifndef _MIMETYPE_H
-#define _MIMETYPE_H
+#ifndef _WX_MIMETYPE_H_
+#define _WX_MIMETYPE_H_

 
 

-// fwd decls
-class wxIcon;
-class wxFileTypeImpl;
-class wxMimeTypesManagerImpl;
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
+    #pragma interface "mimetypebase.h"
+#endif // __GNUG__
+
+// ----------------------------------------------------------------------------
+// headers and such
+// ----------------------------------------------------------------------------

 
 #include "wx/defs.h"
 
 
 #include "wx/defs.h"
 

-#if wxUSE_FILE
+#if wxUSE_MIMETYPE

 
 // the things we really need
 #include "wx/string.h"
 
 // the things we really need
 #include "wx/string.h"

+#include "wx/dynarray.h"
+
+// fwd decls
+class WXDLLIMPEXP_BASE wxIconLocation;
+class WXDLLIMPEXP_BASE wxFileTypeImpl;
+class WXDLLIMPEXP_BASE wxMimeTypesManagerImpl;
+
+// these constants define the MIME informations source under UNIX and are used
+// by wxMimeTypesManager::Initialize()
+enum wxMailcapStyle
+{
+    wxMAILCAP_STANDARD = 1,
+    wxMAILCAP_NETSCAPE = 2,
+    wxMAILCAP_KDE = 4,
+    wxMAILCAP_GNOME = 8,
+
+    wxMAILCAP_ALL = 15
+};
+
+/*
+    TODO: would it be more convenient to have this class?
+
+class WXDLLIMPEXP_BASE wxMimeType : public wxString
+{
+public:
+    // all string ctors here
+
+    wxString GetType() const { return BeforeFirst(_T('/')); }
+    wxString GetSubType() const { return AfterFirst(_T('/')); }
+
+    void SetSubType(const wxString& subtype)
+    {
+        *this = GetType() + _T('/') + subtype;
+    }
+
+    bool Matches(const wxMimeType& wildcard)
+    {
+        // implement using wxMimeTypesManager::IsOfType()
+    }
+};
+
+*/
+
+// ----------------------------------------------------------------------------
+// wxFileTypeInfo: static container of information accessed via wxFileType.
+//
+// This class is used with wxMimeTypesManager::AddFallbacks() and Associate()
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxFileTypeInfo
+{
+public:
+    // ctors
+        // a normal item
+    wxFileTypeInfo(const wxChar *mimeType,
+                   const wxChar *openCmd,
+                   const wxChar *printCmd,
+                   const wxChar *desc,
+                   // the other parameters form a NULL terminated list of
+                   // extensions
+                   ...);
+
+        // the array elements correspond to the parameters of the ctor above in
+        // the same order
+    wxFileTypeInfo(const wxArrayString& sArray);
+
+        // invalid item - use this to terminate the array passed to
+        // wxMimeTypesManager::AddFallbacks
+    wxFileTypeInfo() { }
+
+    // test if this object can be used
+    bool IsValid() const { return !m_mimeType.empty(); }
+
+    // setters
+        // set the icon info
+    void SetIcon(const wxString& iconFile, int iconIndex = 0)
+    {
+        m_iconFile = iconFile;
+        m_iconIndex = iconIndex;
+    }
+        // set the short desc
+    void SetShortDesc(const wxString& shortDesc) { m_shortDesc = shortDesc; }
+
+    // accessors
+        // get the MIME type
+    const wxString& GetMimeType() const { return m_mimeType; }
+        // get the open command
+    const wxString& GetOpenCommand() const { return m_openCmd; }
+        // get the print command
+    const wxString& GetPrintCommand() const { return m_printCmd; }
+        // get the short description (only used under Win32 so far)
+    const wxString& GetShortDesc() const { return m_shortDesc; }
+        // get the long, user visible description
+    const wxString& GetDescription() const { return m_desc; }
+        // get the array of all extensions
+    const wxArrayString& GetExtensions() const { return m_exts; }
+    int GetExtensionsCount() const {return m_exts.GetCount(); }
+        // get the icon info
+    const wxString& GetIconFile() const { return m_iconFile; }
+    int GetIconIndex() const { return m_iconIndex; }
+
+private:
+    wxString m_mimeType,    // the MIME type in "type/subtype" form
+             m_openCmd,     // command to use for opening the file (%s allowed)
+             m_printCmd,    // command to use for printing the file (%s allowed)
+             m_shortDesc,   // a short string used in the registry
+             m_desc;        // a free form description of this file type
+
+    // icon stuff
+    wxString m_iconFile;    // the file containing the icon
+    int      m_iconIndex;   // icon index in this file
+
+    wxArrayString m_exts;   // the extensions which are mapped on this filetype
+

 
 

+#if 0 // TODO
+    // the additional (except "open" and "print") command names and values
+    wxArrayString m_commandNames,
+                  m_commandValues;
+#endif // 0
+};
+
+WX_DECLARE_USER_EXPORTED_OBJARRAY(wxFileTypeInfo, wxArrayFileTypeInfo,
+                                  WXDLLIMPEXP_BASE);
+
+// ----------------------------------------------------------------------------
+// wxFileType: gives access to all information about the files of given type.
+//

 // This class holds information about a given "file type". File type is the
 // same as MIME type under Unix, but under Windows it corresponds more to an
 // extension than to MIME type (in fact, several extensions may correspond to a
 // file type). This object may be created in many different ways and depending
 // on how it was created some fields may be unknown so the return value of all
 // the accessors *must* be checked!
 // This class holds information about a given "file type". File type is the
 // same as MIME type under Unix, but under Windows it corresponds more to an
 // extension than to MIME type (in fact, several extensions may correspond to a
 // file type). This object may be created in many different ways and depending
 // on how it was created some fields may be unknown so the return value of all
 // the accessors *must* be checked!

-class WXDLLEXPORT wxFileType
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxFileType

 {
 {

-friend wxMimeTypesManagerImpl;  // it has access to m_impl
+friend class WXDLLIMPEXP_BASE wxMimeTypesManagerImpl;  // it has access to m_impl

 
 public:
     // An object of this class must be passed to Get{Open|Print}Command. The
 
 public:
     // An object of this class must be passed to Get{Open|Print}Command. The


@@ -44,7 +177,8 @@ public:
     public:
         // ctors
         MessageParameters() { }
     public:
         // ctors
         MessageParameters() { }

-        MessageParameters(const wxString& filename, const wxString& mimetype)
+        MessageParameters(const wxString& filename,
+                          const wxString& mimetype = wxEmptyString)

             : m_filename(filename), m_mimetype(mimetype) { }
 
         // accessors (called by GetOpenCommand)
             : m_filename(filename), m_mimetype(mimetype) { }
 
         // accessors (called by GetOpenCommand)


@@ -54,8 +188,8 @@ public:
         const wxString& GetMimeType() const { return m_mimetype; }
 
         // override this function in derived class
         const wxString& GetMimeType() const { return m_mimetype; }
 
         // override this function in derived class

-        virtual wxString GetParamValue(const wxString& WXUNUSED(paramName)) const
-            { return ""; }
+        virtual wxString GetParamValue(const wxString& WXUNUSED(name)) const
+            { return wxEmptyString; }

 
         // virtual dtor as in any base class
         virtual ~MessageParameters() { }
 
         // virtual dtor as in any base class
         virtual ~MessageParameters() { }


@@ -64,16 +198,22 @@ public:
         wxString m_filename, m_mimetype;
     };
 
         wxString m_filename, m_mimetype;
     };
 

+    // ctor from static data
+    wxFileType(const wxFileTypeInfo& ftInfo);
+

     // accessors: all of them return true if the corresponding information
     // could be retrieved/found, false otherwise (and in this case all [out]
     // parameters are unchanged)
         // return the MIME type for this file type
     bool GetMimeType(wxString *mimeType) const;
     // accessors: all of them return true if the corresponding information
     // could be retrieved/found, false otherwise (and in this case all [out]
     // parameters are unchanged)
         // return the MIME type for this file type
     bool GetMimeType(wxString *mimeType) const;

+    bool GetMimeTypes(wxArrayString& mimeTypes) const;

         // fill passed in array with all extensions associated with this file
         // type
     bool GetExtensions(wxArrayString& extensions);
         // fill passed in array with all extensions associated with this file
         // type
     bool GetExtensions(wxArrayString& extensions);

-        // get the icon corresponding to this file type
-    bool GetIcon(wxIcon *icon) const;
+        // get the icon corresponding to this file type and of the given size
+    bool GetIcon(wxIconLocation *iconloc) const;
+    bool GetIcon(wxIconLocation *iconloc,
+                 const MessageParameters& params) const;

         // get a brief file type description ("*.txt" => "text document")
     bool GetDescription(wxString *desc) const;
 
         // get a brief file type description ("*.txt" => "text document")
     bool GetDescription(wxString *desc) const;
 


@@ -81,10 +221,31 @@ public:
         // get the command to execute the file of given type
     bool GetOpenCommand(wxString *openCmd,
                         const MessageParameters& params) const;
         // get the command to execute the file of given type
     bool GetOpenCommand(wxString *openCmd,
                         const MessageParameters& params) const;

+        // a simpler to use version of GetOpenCommand() -- it only takes the
+        // filename and returns an empty string on failure
+    wxString GetOpenCommand(const wxString& filename) const;

         // get the command to print the file of given type
     bool GetPrintCommand(wxString *printCmd,
                          const MessageParameters& params) const;
 
         // get the command to print the file of given type
     bool GetPrintCommand(wxString *printCmd,
                          const MessageParameters& params) const;
 

+
+        // return the number of commands defined for this file type, 0 if none
+    size_t GetAllCommands(wxArrayString *verbs, wxArrayString *commands,
+                          const wxFileType::MessageParameters& params) const;
+
+    // set an arbitrary command, ask confirmation if it already exists and
+    // overwriteprompt is true
+    bool SetCommand(const wxString& cmd, const wxString& verb,
+        bool overwriteprompt = true);
+
+    bool SetDefaultIcon(const wxString& cmd = wxEmptyString, int index = 0);
+
+
+    // remove the association for this filetype from the system MIME database:
+    // notice that it will only work if the association is defined in the user
+    // file/registry part, we will never modify the system-wide settings
+    bool Unassociate();
+

     // operations
         // expand a string in the format of GetOpenCommand (which may contain
         // '%s' and '%t' format specificators for the file name and mime type
     // operations
         // expand a string in the format of GetOpenCommand (which may contain
         // '%s' and '%t' format specificators for the file name and mime type


@@ -103,29 +264,52 @@ private:
     wxFileType(const wxFileType&);
     wxFileType& operator=(const wxFileType&);
 
     wxFileType(const wxFileType&);
     wxFileType& operator=(const wxFileType&);
 

+    // the static container of wxFileType data: if it's not NULL, it means that
+    // this object is used as fallback only
+    const wxFileTypeInfo *m_info;
+
+    // the object which implements the real stuff like reading and writing
+    // to/from system MIME database

     wxFileTypeImpl *m_impl;
 };
 
     wxFileTypeImpl *m_impl;
 };
 

+// ----------------------------------------------------------------------------
+// wxMimeTypesManager: interface to system MIME database.
+//

 // This class accesses the information about all known MIME types and allows
 // the application to retrieve information (including how to handle data of
 // given type) about them.
 // This class accesses the information about all known MIME types and allows
 // the application to retrieve information (including how to handle data of
 // given type) about them.

-//
-// NB: currently it doesn't support modifying MIME database (read-only access).
-class WXDLLEXPORT wxMimeTypesManager
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxMimeTypesManager

 {
 public:
     // static helper functions
     // -----------------------
 
 {
 public:
     // static helper functions
     // -----------------------
 

-        // check if the given MIME type is the same as the other one: the second
-        // argument may contain wildcards ('*'), but not the first. If the
-        // types are equal or if the mimeType matches wildcard the function
-        // returns TRUE, otherwise it returns FALSE
+        // check if the given MIME type is the same as the other one: the
+        // second argument may contain wildcards ('*'), but not the first. If
+        // the types are equal or if the mimeType matches wildcard the function
+        // returns true, otherwise it returns false

     static bool IsOfType(const wxString& mimeType, const wxString& wildcard);
 
     // ctor
     wxMimeTypesManager();
 
     static bool IsOfType(const wxString& mimeType, const wxString& wildcard);
 
     // ctor
     wxMimeTypesManager();
 

+    // NB: the following 2 functions are for Unix only and don't do anything
+    //     elsewhere
+
+    // loads data from standard files according to the mailcap styles
+    // specified: this is a bitwise OR of wxMailcapStyle values
+    //
+    // use the extraDir parameter if you want to look for files in another
+    // directory
+    void Initialize(int mailcapStyle = wxMAILCAP_ALL,
+                    const wxString& extraDir = wxEmptyString);
+
+    // and this function clears all the data from the manager
+    void ClearData();
+

     // Database lookup: all functions return a pointer to wxFileType object
     // whose methods may be used to query it for the information you're
     // interested in. If the return value is !NULL, caller is responsible for
     // Database lookup: all functions return a pointer to wxFileType object
     // whose methods may be used to query it for the information you're
     // interested in. If the return value is !NULL, caller is responsible for


@@ -135,19 +319,48 @@ public:
         // get file type from MIME type (in format <category>/<format>)
     wxFileType *GetFileTypeFromMimeType(const wxString& mimeType);
 
         // get file type from MIME type (in format <category>/<format>)
     wxFileType *GetFileTypeFromMimeType(const wxString& mimeType);
 

-    // other operations: return TRUE if there were no errors or FALSE if there
-    // were some unreckognized entries (the good entries are always read anyhow)
+    // other operations: return true if there were no errors or false if there
+    // were some unrecognized entries (the good entries are always read anyhow)
+    //
+    // FIXME: These ought to be private ??
+

         // read in additional file (the standard ones are read automatically)
         // in mailcap format (see mimetype.cpp for description)
         //
         // read in additional file (the standard ones are read automatically)
         // in mailcap format (see mimetype.cpp for description)
         //

-        // 'fallback' parameter may be set to TRUE to avoid overriding the
+        // 'fallback' parameter may be set to true to avoid overriding the

         // settings from other, previously parsed, files by this one: normally,
         // the files read most recently would override the older files, but with
         // settings from other, previously parsed, files by this one: normally,
         // the files read most recently would override the older files, but with

-        // fallback == TRUE this won't happen
-    bool ReadMailcap(const wxString& filename, bool fallback = FALSE);
+        // fallback == true this won't happen
+
+    bool ReadMailcap(const wxString& filename, bool fallback = false);

         // read in additional file in mime.types format
     bool ReadMimeTypes(const wxString& filename);
 
         // read in additional file in mime.types format
     bool ReadMimeTypes(const wxString& filename);
 

+    // enumerate all known MIME types
+    //
+    // returns the number of retrieved file types
+    size_t EnumAllFileTypes(wxArrayString& mimetypes);
+
+    // these functions can be used to provide default values for some of the
+    // MIME types inside the program itself (you may also use
+    // ReadMailcap(filenameWithDefaultTypes, true /* use as fallback */) to
+    // achieve the same goal, but this requires having this info in a file).
+    //
+    // The filetypes array should be terminated by either NULL entry or an
+    // invalid wxFileTypeInfo (i.e. the one created with default ctor)
+    void AddFallbacks(const wxFileTypeInfo *filetypes);
+    void AddFallback(const wxFileTypeInfo& ft) { m_fallbacks.Add(ft); }
+
+    // create or remove associations
+
+        // create a new association using the fields of wxFileTypeInfo (at least
+        // the MIME type and the extension should be set)
+        // if the other fields are empty, the existing values should be left alone
+    wxFileType *Associate(const wxFileTypeInfo& ftInfo);
+
+        // undo Associate()
+    bool Unassociate(wxFileType *ft) ;
+

     // dtor (not virtual, shouldn't be derived from)
     ~wxMimeTypesManager();
 
     // dtor (not virtual, shouldn't be derived from)
     ~wxMimeTypesManager();
 


@@ -156,13 +369,28 @@ private:
     wxMimeTypesManager(const wxMimeTypesManager&);
     wxMimeTypesManager& operator=(const wxMimeTypesManager&);
 
     wxMimeTypesManager(const wxMimeTypesManager&);
     wxMimeTypesManager& operator=(const wxMimeTypesManager&);
 

+    // the fallback info which is used if the information is not found in the
+    // real system database
+    wxArrayFileTypeInfo m_fallbacks;
+
+    // the object working with the system MIME database

     wxMimeTypesManagerImpl *m_impl;
     wxMimeTypesManagerImpl *m_impl;

+
+    // if m_impl is NULL, create one
+    void EnsureImpl();
+
+    friend class wxMimeTypeCmnModule;

 };
 
 };
 

-#endif
-  // wxUSE_FILE

 
 

-#endif
-  //_MIMETYPE_H
+// ----------------------------------------------------------------------------
+// global variables
+// ----------------------------------------------------------------------------
+
+// the default mime manager for wxWidgets programs
+extern WXDLLIMPEXP_DATA_BASE(wxMimeTypesManager *) wxTheMimeTypesManager;

 
 

-/* vi: set cin tw=80 ts=4 sw=4: */
+#endif // wxUSE_MIMETYPE
+
+#endif
+  //_WX_MIMETYPE_H_