src/common/accelcmn.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/accelcmn.cpp
   3 // Purpose:     implementation of platform-independent wxAcceleratorEntry parts
   4 // Author:      Vadim Zeitlin
   5 // Created:     2007-05-05
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2007 Vadim Zeitlin <vadim@wxwindows.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // for compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_ACCEL
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/accel.h"
  30     #include "wx/string.h"
  31     #include "wx/intl.h"
  32     #include "wx/log.h"
  33     #include "wx/crt.h"
  34 #endif //WX_PRECOMP
  35
  36 wxAcceleratorTable wxNullAcceleratorTable;
  37
  38 // ============================================================================
  39 // wxAcceleratorEntry implementation
  40 // ============================================================================
  41
  42 static const struct wxKeyName
  43 {
  44     wxKeyCode code;
  45     const char *name;
  46 } wxKeyNames[] =
  47 {
  48     { WXK_DELETE, wxTRANSLATE("DEL") },
  49     { WXK_DELETE, wxTRANSLATE("DELETE") },
  50     { WXK_BACK, wxTRANSLATE("BACK") },
  51     { WXK_INSERT, wxTRANSLATE("INS") },
  52     { WXK_INSERT, wxTRANSLATE("INSERT") },
  53     { WXK_RETURN, wxTRANSLATE("ENTER") },
  54     { WXK_RETURN, wxTRANSLATE("RETURN") },
  55     { WXK_PAGEUP, wxTRANSLATE("PGUP") },
  56     { WXK_PAGEDOWN, wxTRANSLATE("PGDN") },
  57     { WXK_LEFT, wxTRANSLATE("LEFT") },
  58     { WXK_RIGHT, wxTRANSLATE("RIGHT") },
  59     { WXK_UP, wxTRANSLATE("UP") },
  60     { WXK_DOWN, wxTRANSLATE("DOWN") },
  61     { WXK_HOME, wxTRANSLATE("HOME") },
  62     { WXK_END, wxTRANSLATE("END") },
  63     { WXK_SPACE, wxTRANSLATE("SPACE") },
  64     { WXK_TAB, wxTRANSLATE("TAB") },
  65     { WXK_ESCAPE, wxTRANSLATE("ESC") },
  66     { WXK_ESCAPE, wxTRANSLATE("ESCAPE") },
  67     { WXK_CANCEL, wxTRANSLATE("CANCEL") },
  68     { WXK_CLEAR, wxTRANSLATE("CLEAR") },
  69     { WXK_MENU, wxTRANSLATE("MENU") },
  70     { WXK_PAUSE, wxTRANSLATE("PAUSE") },
  71     { WXK_CAPITAL, wxTRANSLATE("CAPITAL") },
  72     { WXK_SELECT, wxTRANSLATE("SELECT") },
  73     { WXK_PRINT, wxTRANSLATE("PRINT") },
  74     { WXK_EXECUTE, wxTRANSLATE("EXECUTE") },
  75     { WXK_SNAPSHOT, wxTRANSLATE("SNAPSHOT") },
  76     { WXK_HELP, wxTRANSLATE("HELP") },
  77     { WXK_ADD, wxTRANSLATE("ADD") },
  78     { WXK_SEPARATOR, wxTRANSLATE("SEPARATOR") },
  79     { WXK_SUBTRACT, wxTRANSLATE("SUBTRACT") },
  80     { WXK_DECIMAL, wxTRANSLATE("DECIMAL") },
  81     { WXK_DIVIDE, wxTRANSLATE("DIVIDE") },
  82     { WXK_NUMLOCK, wxTRANSLATE("NUM_LOCK") },
  83     { WXK_SCROLL, wxTRANSLATE("SCROLL_LOCK") },
  84     { WXK_PAGEUP, wxTRANSLATE("PAGEUP") },
  85     { WXK_PAGEDOWN, wxTRANSLATE("PAGEDOWN") },
  86     { WXK_NUMPAD_SPACE, wxTRANSLATE("KP_SPACE") },
  87     { WXK_NUMPAD_TAB, wxTRANSLATE("KP_TAB") },
  88     { WXK_NUMPAD_ENTER, wxTRANSLATE("KP_ENTER") },
  89     { WXK_NUMPAD_HOME, wxTRANSLATE("KP_HOME") },
  90     { WXK_NUMPAD_LEFT, wxTRANSLATE("KP_LEFT") },
  91     { WXK_NUMPAD_UP, wxTRANSLATE("KP_UP") },
  92     { WXK_NUMPAD_RIGHT, wxTRANSLATE("KP_RIGHT") },
  93     { WXK_NUMPAD_DOWN, wxTRANSLATE("KP_DOWN") },
  94     { WXK_NUMPAD_PAGEUP, wxTRANSLATE("KP_PRIOR") },
  95     { WXK_NUMPAD_PAGEUP, wxTRANSLATE("KP_PAGEUP") },
  96     { WXK_NUMPAD_PAGEDOWN, wxTRANSLATE("KP_NEXT") },
  97     { WXK_NUMPAD_PAGEDOWN, wxTRANSLATE("KP_PAGEDOWN") },
  98     { WXK_NUMPAD_END, wxTRANSLATE("KP_END") },
  99     { WXK_NUMPAD_BEGIN, wxTRANSLATE("KP_BEGIN") },
 100     { WXK_NUMPAD_INSERT, wxTRANSLATE("KP_INSERT") },
 101     { WXK_NUMPAD_DELETE, wxTRANSLATE("KP_DELETE") },
 102     { WXK_NUMPAD_EQUAL, wxTRANSLATE("KP_EQUAL") },
 103     { WXK_NUMPAD_MULTIPLY, wxTRANSLATE("KP_MULTIPLY") },
 104     { WXK_NUMPAD_ADD, wxTRANSLATE("KP_ADD") },
 105     { WXK_NUMPAD_SEPARATOR, wxTRANSLATE("KP_SEPARATOR") },
 106     { WXK_NUMPAD_SUBTRACT, wxTRANSLATE("KP_SUBTRACT") },
 107     { WXK_NUMPAD_DECIMAL, wxTRANSLATE("KP_DECIMAL") },
 108     { WXK_NUMPAD_DIVIDE, wxTRANSLATE("KP_DIVIDE") },
 109     { WXK_WINDOWS_LEFT, wxTRANSLATE("WINDOWS_LEFT") },
 110     { WXK_WINDOWS_RIGHT, wxTRANSLATE("WINDOWS_RIGHT") },
 111     { WXK_WINDOWS_MENU, wxTRANSLATE("WINDOWS_MENU") },
 112     { WXK_COMMAND, wxTRANSLATE("COMMAND") },
 113 };
 114
 115 // return true if the 2 strings refer to the same accel
 116 //
 117 // as accels can be either translated or not, check for both possibilities and
 118 // also compare case-insensitively as the key names case doesn't count
 119 static inline bool CompareAccelString(const wxString& str, const char *accel)
 120 {
 121     return str.CmpNoCase(accel) == 0
 122 #if wxUSE_INTL
 123             || str.CmpNoCase(wxGetTranslation(accel)) == 0
 124 #endif
 125             ;
 126 }
 127
 128 // return prefixCode+number if the string is of the form "<prefix><number>" and
 129 // 0 if it isn't
 130 //
 131 // first and last parameter specify the valid domain for "number" part
 132 static int IsNumberedAccelKey(const wxString& str,
 133                               const char *prefix,
 134                               wxKeyCode prefixCode,
 135                               unsigned first,
 136                               unsigned last)
 137 {
 138     const size_t lenPrefix = wxStrlen(prefix);
 139     if ( !CompareAccelString(str.Left(lenPrefix), prefix) )
 140         return 0;
 141
 142     unsigned long num;
 143     if ( !str.Mid(lenPrefix).ToULong(&num) )
 144         return 0;
 145
 146     if ( num < first || num > last )
 147     {
 148         // this must be a mistake, chances that this is a valid name of another
 149         // key are vanishingly small
 150         wxLogDebug(wxT("Invalid key string \"%s\""), str.c_str());
 151         return 0;
 152     }
 153
 154     return prefixCode + num - first;
 155 }
 156
 157 /* static */
 158 bool
 159 wxAcceleratorEntry::ParseAccel(const wxString& text, int *flagsOut, int *keyOut)
 160 {
 161     // the parser won't like trailing spaces
 162     wxString label = text;
 163     label.Trim(true);
 164
 165     // For compatibility with the old wx versions which accepted (and actually
 166     // even required) a TAB character in the string passed to this function we
 167     // ignore anything up to the first TAB. Notice however that the correct
 168     // input consists of just the accelerator itself and nothing else, this is
 169     // done for compatibility and compatibility only.
 170     int posTab = label.Find(wxT('\t'));
 171     if ( posTab == wxNOT_FOUND )
 172         posTab = 0;
 173     else
 174         posTab++;
 175
 176     // parse the accelerator string
 177     int accelFlags = wxACCEL_NORMAL;
 178     wxString current;
 179     for ( size_t n = (size_t)posTab; n < label.length(); n++ )
 180     {
 181         if ( (label[n] == '+') || (label[n] == '-') )
 182         {
 183             if ( CompareAccelString(current, wxTRANSLATE("ctrl")) )
 184                 accelFlags |= wxACCEL_CTRL;
 185             else if ( CompareAccelString(current, wxTRANSLATE("alt")) )
 186                 accelFlags |= wxACCEL_ALT;
 187             else if ( CompareAccelString(current, wxTRANSLATE("shift")) )
 188                 accelFlags |= wxACCEL_SHIFT;
 189             else // not a recognized modifier name
 190             {
 191                 // we may have "Ctrl-+", for example, but we still want to
 192                 // catch typos like "Crtl-A" so only give the warning if we
 193                 // have something before the current '+' or '-', else take
 194                 // it as a literal symbol
 195                 if ( current.empty() )
 196                 {
 197                     current += label[n];
 198
 199                     // skip clearing it below
 200                     continue;
 201                 }
 202                 else
 203                 {
 204                     wxLogDebug(wxT("Unknown accel modifier: '%s'"),
 205                                current.c_str());
 206                 }
 207             }
 208
 209             current.clear();
 210         }
 211         else // not special character
 212         {
 213             current += (wxChar) wxTolower(label[n]);
 214         }
 215     }
 216
 217     int keyCode;
 218     const size_t len = current.length();
 219     switch ( len )
 220     {
 221         case 0:
 222             wxLogDebug(wxT("No accel key found, accel string ignored."));
 223             return false;
 224
 225         case 1:
 226             // it's just a letter
 227             keyCode = current[0U];
 228
 229             // if the key is used with any modifiers, make it an uppercase one
 230             // because Ctrl-A and Ctrl-a are the same; but keep it as is if it's
 231             // used alone as 'a' and 'A' are different
 232             if ( accelFlags != wxACCEL_NORMAL )
 233                 keyCode = wxToupper(keyCode);
 234             break;
 235
 236         default:
 237             keyCode = IsNumberedAccelKey(current, wxTRANSLATE("F"),
 238                                          WXK_F1, 1, 12);
 239             if ( !keyCode )
 240             {
 241                 for ( size_t n = 0; n < WXSIZEOF(wxKeyNames); n++ )
 242                 {
 243                     const wxKeyName& kn = wxKeyNames[n];
 244                     if ( CompareAccelString(current, kn.name) )
 245                     {
 246                         keyCode = kn.code;
 247                         break;
 248                     }
 249                 }
 250             }
 251
 252             if ( !keyCode )
 253                 keyCode = IsNumberedAccelKey(current, wxTRANSLATE("KP_"),
 254                                              WXK_NUMPAD0, 0, 9);
 255             if ( !keyCode )
 256                 keyCode = IsNumberedAccelKey(current, wxTRANSLATE("SPECIAL"),
 257                                              WXK_SPECIAL1, 1, 20);
 258
 259             if ( !keyCode )
 260             {
 261                 wxLogDebug(wxT("Unrecognized accel key '%s', accel string ignored."),
 262                            current.c_str());
 263                 return false;
 264             }
 265     }
 266
 267
 268     wxASSERT_MSG( keyCode, wxT("logic error: should have key code here") );
 269
 270     if ( flagsOut )
 271         *flagsOut = accelFlags;
 272     if ( keyOut )
 273         *keyOut = keyCode;
 274
 275     return true;
 276 }
 277
 278 /* static */
 279 wxAcceleratorEntry *wxAcceleratorEntry::Create(const wxString& str)
 280 {
 281     const wxString accelStr = str.AfterFirst('\t');
 282     if ( accelStr.empty() )
 283     {
 284         // It's ok to pass strings not containing any accelerators at all to
 285         // this function, wxMenuItem code does it and we should just return
 286         // NULL in this case.
 287         return NULL;
 288     }
 289
 290     int flags,
 291         keyCode;
 292     if ( !ParseAccel(accelStr, &flags, &keyCode) )
 293         return NULL;
 294
 295     return new wxAcceleratorEntry(flags, keyCode);
 296 }
 297
 298 bool wxAcceleratorEntry::FromString(const wxString& str)
 299 {
 300     return ParseAccel(str, &m_flags, &m_keyCode);
 301 }
 302
 303 wxString wxAcceleratorEntry::ToString() const
 304 {
 305     wxString text;
 306
 307     int flags = GetFlags();
 308     if ( flags & wxACCEL_ALT )
 309         text += _("Alt+");
 310     if ( flags & (wxACCEL_CTRL | wxACCEL_CMD) )
 311         text += _("Ctrl+");
 312     if ( flags & wxACCEL_SHIFT )
 313         text += _("Shift+");
 314
 315     const int code = GetKeyCode();
 316
 317     if ( code >= WXK_F1 && code <= WXK_F12 )
 318         text << _("F") << code - WXK_F1 + 1;
 319     else if ( code >= WXK_NUMPAD0 && code <= WXK_NUMPAD9 )
 320         text << _("KP_") << code - WXK_NUMPAD0;
 321     else if ( code >= WXK_SPECIAL1 && code <= WXK_SPECIAL20 )
 322         text << _("SPECIAL") << code - WXK_SPECIAL1 + 1;
 323     else // check the named keys
 324     {
 325         size_t n;
 326         for ( n = 0; n < WXSIZEOF(wxKeyNames); n++ )
 327         {
 328             const wxKeyName& kn = wxKeyNames[n];
 329             if ( code == kn.code )
 330             {
 331                 text << wxGetTranslation(kn.name);
 332                 break;
 333             }
 334         }
 335
 336         if ( n == WXSIZEOF(wxKeyNames) )
 337         {
 338             // must be a simple key
 339             if (
 340 #if !wxUSE_UNICODE
 341                  // we can't call wxIsalnum() for non-ASCII characters in ASCII
 342                  // build as they're only defined for the ASCII range (or EOF)
 343                  wxIsascii(code) &&
 344 #endif // ANSI
 345                     wxIsalnum(code) )
 346             {
 347                 text << (wxChar)code;
 348             }
 349             else
 350             {
 351                 wxFAIL_MSG( wxT("unknown keyboard accelerator code") );
 352             }
 353         }
 354     }
 355
 356     return text;
 357 }
 358
 359 wxAcceleratorEntry *wxGetAccelFromString(const wxString& label)
 360 {
 361     return wxAcceleratorEntry::Create(label);
 362 }
 363
 364 #endif // wxUSE_ACCEL
 365
 366
 367