KernelLand/Kernel/drv/vterm_input.c

   1 /*
   2  * Acess2 Kernel
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * drv/vterm_input.c
   6  * - Virtual Terminal - Input code
   7  */
   8 #include "vterm.h"
   9 #include <api_drv_keyboard.h>
  10 #define DEBUG   1
  11
  12 // === GLOBALS ===
  13 // --- Key States --- (Used for VT Switching/Magic Combos)
  14  int    gbVT_CtrlDown = 0;
  15  int    gbVT_AltDown = 0;
  16  int    gbVT_SysrqDown = 0;
  17
  18 // === CODE ===
  19 /**
  20  * \fn void VT_InitInput()
  21  * \brief Initialises the input
  22  */
  23 void VT_InitInput()
  24 {
  25         giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
  26         if(giVT_InputDevHandle == -1) {
  27                 Log_Warning("VTerm", "Can't open the input device '%s'", gsVT_InputDevice);
  28                 return ;
  29         }
  30         VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
  31         LOG("VTerm input initialised");
  32 }
  33
  34 /**
  35  * \fn void VT_KBCallBack(Uint32 Codepoint)
  36  * \brief Called on keyboard interrupt
  37  * \param Codepoint     Pseudo-UTF32 character
  38  *
  39  * Handles a key press and sends the key code to the user's buffer.
  40  * If the code creates a kernel-magic sequence, it is not passed to the
  41  * user and is handled in-kernel.
  42  */
  43 void VT_KBCallBack(Uint32 Codepoint)
  44 {
  45         tVTerm  *term = gpVT_CurTerm;
  46
  47         // Catch VT binds
  48         switch( Codepoint & KEY_ACTION_MASK )
  49         {
  50         case KEY_ACTION_RAWSYM:
  51                 term->RawScancode = Codepoint & KEY_CODEPOINT_MASK;
  52                 break;
  53         case KEY_ACTION_RELEASE:
  54                 switch(term->RawScancode)
  55                 {
  56                 case KEYSYM_LEFTALT:    gbVT_AltDown &= ~1;     break;
  57                 case KEYSYM_RIGHTALT:   gbVT_AltDown &= ~2;     break;
  58                 case KEYSYM_LEFTCTRL:   gbVT_CtrlDown &= ~1;    break;
  59                 case KEYSYM_RIGHTCTRL:  gbVT_CtrlDown &= ~2;    break;
  60                 }
  61                 break;
  62
  63         case KEY_ACTION_PRESS:
  64                 switch(term->RawScancode)
  65                 {
  66                 case KEYSYM_LEFTALT:    gbVT_AltDown |= 1;      break;
  67                 case KEYSYM_RIGHTALT:   gbVT_AltDown |= 2;      break;
  68                 case KEYSYM_LEFTCTRL:   gbVT_CtrlDown |= 1;     break;
  69                 case KEYSYM_RIGHTCTRL:  gbVT_CtrlDown |= 2;     break;
  70                 }
  71
  72                 // Check if the magic keys are held
  73                 if(!gbVT_AltDown || !gbVT_CtrlDown)
  74                         break;
  75
  76                 switch(term->RawScancode)
  77                 {
  78                 case KEYSYM_F1 :        VT_SetTerminal(0);      return;
  79                 case KEYSYM_F2 :        VT_SetTerminal(1);      return;
  80                 case KEYSYM_F3 :        VT_SetTerminal(2);      return;
  81                 case KEYSYM_F4 :        VT_SetTerminal(3);      return;
  82                 case KEYSYM_F5 :        VT_SetTerminal(4);      return;
  83                 case KEYSYM_F6 :        VT_SetTerminal(5);      return;
  84                 case KEYSYM_F7 :        VT_SetTerminal(6);      return;
  85                 case KEYSYM_F8 :        VT_SetTerminal(7);      return;
  86                 case KEYSYM_F9 :        VT_SetTerminal(8);      return;
  87                 case KEYSYM_F10:        VT_SetTerminal(9);      return;
  88                 case KEYSYM_F11:        VT_SetTerminal(10);     return;
  89                 case KEYSYM_F12:        VT_SetTerminal(11);     return;
  90                 }
  91
  92                 // Scrolling is only valid in text mode
  93                 if(term->Mode != TERM_MODE_TEXT)
  94                         break;
  95
  96 //              Log_Debug("VTerm", "Magic Ctrl-Alt-0x%x", term->RawScancode);
  97
  98                 const unsigned int scroll_step = term->TextHeight / 2;
  99                 // Note the lack of giVT_Scrollback+1, view top can't go above size-onescreen
 100                 const unsigned int scroll_max = term->TextHeight * giVT_Scrollback;
 101                 switch(term->RawScancode)
 102                 {
 103                 // VTerm scrolling
 104                 // - Scrolls half a screen at a time
 105                 // - View up (text goes down)
 106                 case KEYSYM_PGUP:
 107                         if( term->Flags & VT_FLAG_ALTBUF )
 108                                 return ;
 109                         Log_Debug("VTerm", "ScrollUp - Old=%i, step=%i", term->ViewTopRow, scroll_step);
 110                         term->ViewTopRow = (term->ViewTopRow > scroll_step ? term->ViewTopRow - scroll_step : 0);
 111                         Log_Debug("VTerm", "ScrollUp - New=%i", term->ViewTopRow);
 112                         VT_int_UpdateScreen(term, 1);
 113                         return;
 114                 // - View down (text goes up)
 115                 case KEYSYM_PGDN:
 116                         if( term->Flags & VT_FLAG_ALTBUF )
 117                                 return ;
 118
 119                         Log_Debug("VTerm", "ScrollDown - Old=%i, max=%i", term->ViewTopRow, scroll_max);
 120                         term->ViewTopRow = MIN(term->ViewTopRow + scroll_step, scroll_max);
 121                         Log_Debug("VTerm", "ScrollDown - New=%i", term->ViewTopRow);
 122                         VT_int_UpdateScreen(term, 1);
 123                         return;
 124                 }
 125                 break;
 126         }
 127
 128         // Encode key
 129         if(term->Mode == PTYBUFFMT_TEXT)
 130         {
 131                 Uint8   buf[6] = {0};
 132                  int    len = 0;
 133
 134                 // Ignore anything that isn't a press or refire
 135                 if( (Codepoint & KEY_ACTION_MASK) != KEY_ACTION_PRESS
 136                  && (Codepoint & KEY_ACTION_MASK) != KEY_ACTION_REFIRE
 137                     )
 138                 {
 139                         return ;
 140                 }
 141
 142                 Codepoint &= KEY_CODEPOINT_MASK;
 143
 144                 // Get UTF-8/ANSI Encoding
 145                 if( Codepoint == 0 )
 146                 {
 147                         // Non-printable keys
 148                         switch(term->RawScancode)
 149                         {
 150                         case KEYSYM_LEFTARROW:
 151                         case KEYSYM_KP4:
 152                                 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'D';
 153                                 len = 3;
 154                                 break;
 155                         case KEYSYM_RIGHTARROW:
 156                         case KEYSYM_KP6:
 157                                 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'C';
 158                                 len = 3;
 159                                 break;
 160                         case KEYSYM_UPARROW:
 161                         case KEYSYM_KP8:
 162                                 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'A';
 163                                 len = 3;
 164                                 break;
 165                         case KEYSYM_DOWNARROW:
 166                         case KEYSYM_KP2:
 167                                 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'B';
 168                                 len = 3;
 169                                 break;
 170
 171                         case KEYSYM_PGUP:
 172                         case KEYSYM_KP9:        // If Codepoint=0, It's page up
 173                                 buf[0] = '\x1B'; buf[1] = '['; buf[2] = '5'; buf[3] = '~';
 174                                 len = 4;
 175                                 break;
 176                         case KEYSYM_PGDN:
 177                         case KEYSYM_KP3:        // If Codepoint=0, It's page down
 178                                 buf[0] = '\x1B'; buf[1] = '['; buf[2] = '6'; buf[3] = '~';
 179                                 len = 4;
 180                                 break;
 181
 182                         case KEYSYM_HOME:
 183                         case KEYSYM_KP7:        // Codepoint==0, then it's home (not translated)
 184                                 buf[0] = '\x1B'; buf[1] = 'O'; buf[2] = 'H';
 185                                 len = 3;
 186                                 break;
 187                         case KEYSYM_END:
 188                         case KEYSYM_KP1:        // You get the drill
 189                                 buf[0] = '\x1B'; buf[1] = 'O'; buf[2] = 'F';
 190                                 len = 3;
 191                                 break;
 192
 193                         case KEYSYM_INSERT:
 194                         case KEYSYM_KP0:        // See above
 195                                 buf[0] = '\x1B'; buf[1] = '['; buf[2] = '2'; buf[3] = '~';
 196                                 len = 4;
 197                                 break;
 198                         case KEYSYM_DELETE:
 199                         case KEYSYM_KPPERIOD:   // Are you that dumb? Look up
 200                                 buf[0] = '\x1B'; buf[1] = '['; buf[2] = '3'; buf[3] = '~';
 201                                 len = 4;
 202                                 break;
 203                         }
 204                 }
 205                 else if( gbVT_CtrlDown )
 206                 {
 207                         len = 1;
 208                         switch( term->RawScancode )
 209                         {
 210                         case KEYSYM_2:
 211                                 buf[0] = '\0';
 212                                 break;
 213                         case KEYSYM_3 ... KEYSYM_7:
 214                                 buf[0] = 0x1b + (term->RawScancode - KEYSYM_3);
 215                                 break;
 216                         case KEYSYM_8:
 217                                 buf[0] = 0x7f;
 218                                 break;
 219                         // - Ctrl-A = \1, Ctrl-Z = \x1a
 220                         case KEYSYM_a ... KEYSYM_z:
 221                                 buf[0] = 0x01 + (term->RawScancode - KEYSYM_a);
 222                                 break;
 223                         default:
 224                                 goto utf_encode;
 225                         }
 226                 }
 227                 else
 228                 {
 229                 utf_encode:
 230                         // Attempt to encode in UTF-8
 231                         len = WriteUTF8( buf, Codepoint );
 232                         if(len == 0) {
 233                                 Warning("Codepoint (%x) is unrepresentable in UTF-8", Codepoint);
 234                         }
 235                 }
 236
 237                 if(len == 0) {
 238                         // Unprintable / Don't Pass
 239                         return;
 240                 }
 241
 242                 PTY_SendInput(term->PTY, (void*)buf, len);
 243         }
 244         else
 245         {
 246                 PTY_SendInput(term->PTY, (void*)&Codepoint, sizeof(Codepoint));
 247         }
 248 }
 249