src/palmos/prefconf.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/palmos/prefconf.cpp
   3 // Purpose:     wxPrefConfig implementation
   4 // Author:      Wlodzimierz ABX Skiba
   5 // Modified by:
   6 // Created:     28.12.2004
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Wlodzimierz Skiba
   9 // License:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16 #pragma hdrstop
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20     #include  "wx/string.h"
  21 #endif //WX_PRECOMP
  22
  23 #if wxUSE_CONFIG && wxUSE_CONFIG_NATIVE
  24
  25 #include "wx/config.h"
  26
  27 // ============================================================================
  28 // implementation
  29 // ============================================================================
  30
  31 /*
  32
  33 http://www.palmos.com/dev/support/docs/protein_books/System_Management/PreferenceConcepts.html
  34
  35 This wxPrefConfig class is a wxConfig wrapper around PalmOS Preferences
  36 functionality. Preferences allow to write any structure into its database so
  37 wxPrefConfig writes there all entries of single group into one Preference.
  38 To optimize read/write operations value of preference is cached. Cache is filled
  39 after each change of the path (including using path to group names in all
  40 operations) and it is flushed on destructor, any path change on or purpose
  41 with Flush().
  42
  43 Meaning of styles:
  44
  45   wxCONFIG_USE_LOCAL_FILE => store config in "saved" preferences database
  46                              (not to be backed up during a HotSync operation)
  47   wxCONFIG_USE_GLOBAL_FILE => store config in "unsaved" preferences database
  48                              (backed up during a HotSync operation)
  49
  50
  51 Each Preference is an array of chars. First unsigned char describes
  52 number N of chars used for Preference size. Next N chars (string) contains
  53 length of rest of Preference. Preference consists in serie of entries which
  54 should be read in loop until in reaches end of Preference.
  55
  56   Each entry is an set of chars with following structure:
  57   1. name (null terminated)
  58   2. type (single char): b,s,g,l,d (see value)
  59   3. value
  60      - for type="b" (bool) it os "0" or "1"
  61      - for type="s" (string) it is null terminated set of chars
  62      - for type="g" (subgroup) as for "s" but string is converted to
  63        uint16_t for id parameter of ::PrefGetAppPreferences()
  64      - for type="l" (long) as for "s" but string is converted to long
  65      - for type="d" (double) as for "s" but string is converted to double
  66      - otherwise it is ""
  67
  68 So all together first Read in group needs 3 reading from Preference:
  69   1. take the length N of length
  70   2. take the length M of the group content
  71   3. take the group content
  72 and all it is in single Preference to not overload Preferences database.
  73 As long as each next Read/Write is performed in the same group then none
  74 access to Preferences is performed. Flushing needs only single writing to
  75 databease because all 3 parts of Preference can be prepared in memory.
  76
  77 NOTE: wxPrefConfig can read/write only its own entries. It is impossible to
  78 know structures of Preferences of other non wxW applications.
  79
  80 */
  81
  82 // ----------------------------------------------------------------------------
  83 // ctor/dtor
  84 // ----------------------------------------------------------------------------
  85 IMPLEMENT_ABSTRACT_CLASS(wxPrefConfig, wxConfigBase)
  86
  87 wxPrefConfig::wxPrefConfig(const wxString& appName, const wxString& vendorName,
  88                            const wxString& strLocal, const wxString& strGlobal,
  89                            long style)
  90              : wxConfigBase(appName, vendorName, strLocal, strGlobal, style)
  91 {
  92 }
  93
  94 // ----------------------------------------------------------------------------
  95 // path management
  96 // ----------------------------------------------------------------------------
  97
  98 void wxPrefConfig::SetPath(const wxString& strPath)
  99 {
 100 }
 101
 102 // ----------------------------------------------------------------------------
 103 // enumeration (works only with current group)
 104 // ----------------------------------------------------------------------------
 105
 106 bool wxPrefConfig::GetFirstGroup(wxString& str, long& lIndex) const
 107 {
 108 }
 109
 110 bool wxPrefConfig::GetNextGroup(wxString& str, long& lIndex) const
 111 {
 112     /* TODO */
 113     return false;
 114 }
 115
 116 bool wxPrefConfig::GetFirstEntry(wxString& str, long& lIndex) const
 117 {
 118     /* TODO */
 119     return false;
 120 }
 121
 122 bool wxPrefConfig::GetNextEntry(wxString& str, long& lIndex) const
 123 {
 124     /* TODO */
 125     return false;
 126 }
 127
 128 size_t wxPrefConfig::GetNumberOfEntries(bool WXUNUSED(bRecursive)) const
 129 {
 130     /* TODO */
 131     return 0;
 132 }
 133
 134 size_t wxPrefConfig::GetNumberOfGroups(bool WXUNUSED(bRecursive)) const
 135 {
 136     /* TODO */
 137     return 0;
 138 }
 139
 140 // ----------------------------------------------------------------------------
 141 // tests for existence
 142 // ----------------------------------------------------------------------------
 143
 144 bool wxPrefConfig::HasGroup(const wxString& key) const
 145 {
 146     /* TODO */
 147     return false;
 148 }
 149
 150 bool wxPrefConfig::HasEntry(const wxString& key) const
 151 {
 152     /* TODO */
 153     return false;
 154 }
 155
 156 wxConfigBase::EntryType wxPrefConfig::GetEntryType(const wxString& key) const
 157 {
 158     /* TODO */
 159     return wxConfigBase::Type_Unknown;
 160 }
 161
 162 // ----------------------------------------------------------------------------
 163 // reading/writing
 164 // ----------------------------------------------------------------------------
 165
 166 bool wxPrefConfig::DoReadString(const wxString& key, wxString *pStr) const
 167 {
 168     /* TODO */
 169     return false;
 170 }
 171
 172 // this exactly reproduces the string version above except for ExpandEnvVars(),
 173 // we really should avoid this code duplication somehow...
 174
 175 bool wxPrefConfig::DoReadLong(const wxString& key, long *plResult) const
 176 {
 177     /* TODO */
 178     return false;
 179 }
 180
 181 bool wxPrefConfig::DoWriteString(const wxString& key, const wxString& szValue)
 182 {
 183     /* TODO */
 184     return false;
 185 }
 186
 187 bool wxPrefConfig::DoWriteLong(const wxString& key, long lValue)
 188 {
 189     /* TODO */
 190     return false;
 191 }
 192
 193 // ----------------------------------------------------------------------------
 194 // renaming
 195 // ----------------------------------------------------------------------------
 196
 197 bool wxPrefConfig::RenameEntry(const wxString& oldName, const wxString& newName)
 198 {
 199     /* TODO */
 200     return false;
 201 }
 202
 203 bool wxPrefConfig::RenameGroup(const wxString& oldName, const wxString& newName)
 204 {
 205     /* TODO */
 206     return false;
 207 }
 208
 209 // ----------------------------------------------------------------------------
 210 // deleting
 211 // ----------------------------------------------------------------------------
 212
 213 bool wxPrefConfig::DeleteEntry(const wxString& value, bool bGroupIfEmptyAlso)
 214 {
 215     /* TODO */
 216     return false;
 217 }
 218
 219 bool wxPrefConfig::DeleteGroup(const wxString& key)
 220 {
 221     /* TODO */
 222     return false;
 223 }
 224
 225 bool wxPrefConfig::DeleteAll()
 226 {
 227     /* TODO */
 228     return false;
 229 }
 230
 231 #endif // wxUSE_CONFIG && wxUSE_CONFIG_NATIVE