include/wx/dir.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/dir.h
   3 // Purpose:     wxDir is a class for enumerating the files in a directory
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     08.12.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_DIR_H_
  13 #define _WX_DIR_H_
  14
  15 #include "wx/string.h"
  16
  17 class WXDLLIMPEXP_BASE wxArrayString;
  18
  19 // ----------------------------------------------------------------------------
  20 // constants
  21 // ----------------------------------------------------------------------------
  22
  23 // these flags define what kind of filenames is included in the list of files
  24 // enumerated by GetFirst/GetNext
  25 enum
  26 {
  27     wxDIR_FILES     = 0x0001,       // include files
  28     wxDIR_DIRS      = 0x0002,       // include directories
  29     wxDIR_HIDDEN    = 0x0004,       // include hidden files
  30     wxDIR_DOTDOT    = 0x0008,       // include '.' and '..'
  31
  32     // by default, enumerate everything except '.' and '..'
  33     wxDIR_DEFAULT   = wxDIR_FILES | wxDIR_DIRS | wxDIR_HIDDEN
  34 };
  35
  36 // these constants are possible return value of wxDirTraverser::OnDir()
  37 enum wxDirTraverseResult
  38 {
  39     wxDIR_IGNORE = -1,      // ignore this directory but continue with others
  40     wxDIR_STOP,             // stop traversing
  41     wxDIR_CONTINUE          // continue into this directory
  42 };
  43
  44 // ----------------------------------------------------------------------------
  45 // wxDirTraverser: helper class for wxDir::Traverse()
  46 // ----------------------------------------------------------------------------
  47
  48 class WXDLLIMPEXP_BASE wxDirTraverser
  49 {
  50 public:
  51     /// a virtual dtor has been provided since this class has virtual members
  52     virtual ~wxDirTraverser() { }
  53     // called for each file found by wxDir::Traverse()
  54     //
  55     // return wxDIR_STOP or wxDIR_CONTINUE from here (wxDIR_IGNORE doesn't
  56     // make sense)
  57     virtual wxDirTraverseResult OnFile(const wxString& filename) = 0;
  58
  59     // called for each directory found by wxDir::Traverse()
  60     //
  61     // return one of the enum elements defined above
  62     virtual wxDirTraverseResult OnDir(const wxString& dirname) = 0;
  63
  64     // called for each directory which we couldn't open during our traversal
  65     // of the directory tyree
  66     //
  67     // this method can also return either wxDIR_STOP, wxDIR_IGNORE or
  68     // wxDIR_CONTINUE but the latter is treated specially: it means to retry
  69     // opening the directory and so may lead to infinite loop if it is
  70     // returned unconditionally, be careful with this!
  71     //
  72     // the base class version always returns wxDIR_IGNORE
  73     virtual wxDirTraverseResult OnOpenError(const wxString& dirname);
  74 };
  75
  76 // ----------------------------------------------------------------------------
  77 // wxDir: portable equivalent of {open/read/close}dir functions
  78 // ----------------------------------------------------------------------------
  79
  80 class WXDLLIMPEXP_BASE wxDirData;
  81
  82 class WXDLLIMPEXP_BASE wxDir
  83 {
  84 public:
  85     // test for existence of a directory with the given name
  86     static bool Exists(const wxString& dir);
  87
  88     // ctors
  89     // -----
  90
  91     // default, use Open()
  92     wxDir() { m_data = NULL; }
  93
  94     // opens the directory for enumeration, use IsOpened() to test success
  95     wxDir(const wxString& dir);
  96
  97     // dtor cleans up the associated ressources
  98     ~wxDir();
  99
 100     // open the directory for enumerating
 101     bool Open(const wxString& dir);
 102
 103     // returns true if the directory was successfully opened
 104     bool IsOpened() const;
 105
 106     // get the full name of the directory (without '/' at the end)
 107     wxString GetName() const;
 108
 109     // file enumeration routines
 110     // -------------------------
 111
 112     // start enumerating all files matching filespec (or all files if it is
 113     // empty) and flags, return true on success
 114     bool GetFirst(wxString *filename,
 115                   const wxString& filespec = wxEmptyString,
 116                   int flags = wxDIR_DEFAULT) const;
 117
 118     // get next file in the enumeration started with GetFirst()
 119     bool GetNext(wxString *filename) const;
 120
 121     // return true if this directory has any files in it
 122     bool HasFiles(const wxString& spec = wxEmptyString);
 123
 124     // return true if this directory has any subdirectories
 125     bool HasSubDirs(const wxString& spec = wxEmptyString);
 126
 127     // enumerate all files in this directory and its subdirectories
 128     //
 129     // return the number of files found
 130     size_t Traverse(wxDirTraverser& sink,
 131                     const wxString& filespec = wxEmptyString,
 132                     int flags = wxDIR_DEFAULT) const;
 133
 134     // simplest version of Traverse(): get the names of all files under this
 135     // directory into filenames array, return the number of files
 136     static size_t GetAllFiles(const wxString& dirname,
 137                               wxArrayString *files,
 138                               const wxString& filespec = wxEmptyString,
 139                               int flags = wxDIR_DEFAULT);
 140
 141 private:
 142     friend class wxDirData;
 143
 144     wxDirData *m_data;
 145
 146     DECLARE_NO_COPY_CLASS(wxDir)
 147 };
 148
 149 #endif // _WX_DIR_H_
 150