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static/plugins/spice-html5/utils.js 9.33 KB
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  "use strict";
  /*
     Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
  
     This file is part of spice-html5.
  
     spice-html5 is free software: you can redistribute it and/or modify
     it under the terms of the GNU Lesser General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
  
     spice-html5 is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
  */
  
  /*----------------------------------------------------------------------------
  **  Utility settings and functions for Spice
  **--------------------------------------------------------------------------*/
  var DEBUG = 0;
  var DUMP_DRAWS = false;
  var DUMP_CANVASES = false;
  
  
  /*----------------------------------------------------------------------------
  **  combine_array_buffers
  **      Combine two array buffers.
  **      FIXME - this can't be optimal.  See wire.js about eliminating the need.
  **--------------------------------------------------------------------------*/
  function combine_array_buffers(a1, a2)
  {
      var in1 = new Uint8Array(a1);
      var in2 = new Uint8Array(a2);
      var ret = new ArrayBuffer(a1.byteLength + a2.byteLength);
      var out = new Uint8Array(ret);
      var o = 0;
      var i;
      for (i = 0; i < in1.length; i++)
          out[o++] = in1[i];
      for (i = 0; i < in2.length; i++)
          out[o++] = in2[i];
  
      return ret;
  }
  
  /*----------------------------------------------------------------------------
  **  hexdump_buffer
  **--------------------------------------------------------------------------*/
  function hexdump_buffer(a)
  {
      var mg = new Uint8Array(a);
      var hex = "";
      var str = "";
      var last_zeros = 0;
      for (var i = 0; i < mg.length; i++)
      {
          var h = Number(mg[i]).toString(16);
          if (h.length == 1)
              hex += "0";
          hex += h + " ";
  
          if (mg[i] == 10 || mg[i] == 13 || mg[i] == 8)
              str += ".";
          else
              str += String.fromCharCode(mg[i]);
  
          if ((i % 16 == 15) || (i == (mg.length - 1)))
          {
              while (i % 16 != 15)
              {
                  hex += "   ";
                  i++;
              }
  
              if (last_zeros == 0)
                  console.log(hex + " | " + str);
  
              if (hex == "00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ")
              {
                  if (last_zeros == 1)
                  {
                      console.log(".");
                      last_zeros++;
                  }
                  else if (last_zeros == 0)
                      last_zeros++;
              }
              else
                  last_zeros = 0;
  
              hex = str = "";
          }
      }
  }
  
  /*----------------------------------------------------------------------------
  ** Converting keycodes to AT scancodes is very hard.
  ** luckly there are some resources on the web and in the Xorg driver that help
  ** us figure out what browser depenend keycodes match to what scancodes.
  **
  ** This will most likely not work for non US keyboard and browsers other than
  ** modern Chrome and FireFox.
  **--------------------------------------------------------------------------*/
  var common_scanmap = [];
  common_scanmap['Q'.charCodeAt(0)]  = KEY_Q;
  common_scanmap['W'.charCodeAt(0)]  = KEY_W;
  common_scanmap['E'.charCodeAt(0)]  = KEY_E;
  common_scanmap['R'.charCodeAt(0)]  = KEY_R;
  common_scanmap['T'.charCodeAt(0)]  = KEY_T;
  common_scanmap['Y'.charCodeAt(0)]  = KEY_Y;
  common_scanmap['U'.charCodeAt(0)]  = KEY_U;
  common_scanmap['I'.charCodeAt(0)]  = KEY_I;
  common_scanmap['O'.charCodeAt(0)]  = KEY_O;
  common_scanmap['P'.charCodeAt(0)]  = KEY_P;
  common_scanmap['A'.charCodeAt(0)]  = KEY_A;
  common_scanmap['S'.charCodeAt(0)]  = KEY_S;
  common_scanmap['D'.charCodeAt(0)]  = KEY_D;
  common_scanmap['F'.charCodeAt(0)]  = KEY_F;
  common_scanmap['G'.charCodeAt(0)]  = KEY_G;
  common_scanmap['H'.charCodeAt(0)]  = KEY_H;
  common_scanmap['J'.charCodeAt(0)]  = KEY_J;
  common_scanmap['K'.charCodeAt(0)]  = KEY_K;
  common_scanmap['L'.charCodeAt(0)]  = KEY_L;
  common_scanmap['Z'.charCodeAt(0)]  = KEY_Z;
  common_scanmap['X'.charCodeAt(0)]  = KEY_X;
  common_scanmap['C'.charCodeAt(0)]  = KEY_C;
  common_scanmap['V'.charCodeAt(0)]  = KEY_V;
  common_scanmap['B'.charCodeAt(0)]  = KEY_B;
  common_scanmap['N'.charCodeAt(0)]  = KEY_N;
  common_scanmap['M'.charCodeAt(0)]  = KEY_M;
  common_scanmap[' '.charCodeAt(0)]  = KEY_Space;
  common_scanmap[13]                 = KEY_Enter;
  common_scanmap[27]                 = KEY_Escape;
  common_scanmap[8]                  = KEY_BackSpace;
  common_scanmap[9]                  = KEY_Tab;
  common_scanmap[16]                 = KEY_ShiftL;
  common_scanmap[17]                 = KEY_LCtrl;
  common_scanmap[18]                 = KEY_Alt;
  common_scanmap[20]                 = KEY_CapsLock;
  common_scanmap[144]                = KEY_NumLock;
  common_scanmap[112]                = KEY_F1;
  common_scanmap[113]                = KEY_F2;
  common_scanmap[114]                = KEY_F3;
  common_scanmap[115]                = KEY_F4;
  common_scanmap[116]                = KEY_F5;
  common_scanmap[117]                = KEY_F6;
  common_scanmap[118]                = KEY_F7;
  common_scanmap[119]                = KEY_F8;
  common_scanmap[120]                = KEY_F9;
  common_scanmap[121]                = KEY_F10;
  common_scanmap[122]                = KEY_F11;
  common_scanmap[123]                = KEY_F12;
  
  /* These externded scancodes do not line up with values from atKeynames */
  common_scanmap[42]                 = 99;
  common_scanmap[19]                 = 101;    // Break
  common_scanmap[111]                = 0xE035; // KP_Divide
  common_scanmap[106]                = 0xE037; // KP_Multiply
  common_scanmap[36]                 = 0xE047; // Home
  common_scanmap[38]                 = 0xE048; // Up
  common_scanmap[33]                 = 0xE049; // PgUp
  common_scanmap[37]                 = 0xE04B; // Left
  common_scanmap[39]                 = 0xE04D; // Right
  common_scanmap[35]                 = 0xE04F; // End
  common_scanmap[40]                 = 0xE050; // Down
  common_scanmap[34]                 = 0xE051; // PgDown
  common_scanmap[45]                 = 0xE052; // Insert
  common_scanmap[46]                 = 0xE053; // Delete
  common_scanmap[44]                 = 0x2A37; // Print
  
  /* These are not common between ALL browsers but are between Firefox and DOM3 */
  common_scanmap['1'.charCodeAt(0)]  = KEY_1;
  common_scanmap['2'.charCodeAt(0)]  = KEY_2;
  common_scanmap['3'.charCodeAt(0)]  = KEY_3;
  common_scanmap['4'.charCodeAt(0)]  = KEY_4;
  common_scanmap['5'.charCodeAt(0)]  = KEY_5;
  common_scanmap['6'.charCodeAt(0)]  = KEY_6;
  common_scanmap['7'.charCodeAt(0)]  = KEY_7;
  common_scanmap['8'.charCodeAt(0)]  = KEY_8;
  common_scanmap['9'.charCodeAt(0)]  = KEY_9;
  common_scanmap['0'.charCodeAt(0)]  = KEY_0;
  common_scanmap[145]                = KEY_ScrollLock;
  common_scanmap[103]                = KEY_KP_7;
  common_scanmap[104]                = KEY_KP_8;
  common_scanmap[105]                = KEY_KP_9;
  common_scanmap[100]                = KEY_KP_4;
  common_scanmap[101]                = KEY_KP_5;
  common_scanmap[102]                = KEY_KP_6;
  common_scanmap[107]                = KEY_KP_Plus;
  common_scanmap[97]                 = KEY_KP_1;
  common_scanmap[98]                 = KEY_KP_2;
  common_scanmap[99]                 = KEY_KP_3;
  common_scanmap[96]                 = KEY_KP_0;
  common_scanmap[110]                = KEY_KP_Decimal;
  common_scanmap[191]                = KEY_Slash;
  common_scanmap[190]                = KEY_Period;
  common_scanmap[188]                = KEY_Comma;
  common_scanmap[220]                = KEY_BSlash;
  common_scanmap[192]                = KEY_Tilde;
  common_scanmap[222]                = KEY_Quote;
  common_scanmap[219]                = KEY_LBrace;
  common_scanmap[221]                = KEY_RBrace;
  
  common_scanmap[91]                 = 0xE05B; //KEY_LMeta
  common_scanmap[92]                 = 0xE05C; //KEY_RMeta
  common_scanmap[93]                 = 0xE05D; //KEY_Menu
  
  /* Firefox/Mozilla codes */
  var firefox_scanmap = [];
  firefox_scanmap[173]                = KEY_Minus;
  firefox_scanmap[109]                = KEY_Minus;
  firefox_scanmap[61]                 = KEY_Equal;
  firefox_scanmap[59]                 = KEY_SemiColon;
  
  /* DOM3 codes */
  var DOM_scanmap = [];
  DOM_scanmap[189]                = KEY_Minus;
  DOM_scanmap[187]                = KEY_Equal;
  DOM_scanmap[186]                = KEY_SemiColon;
  
  function get_scancode(code)
  {
      if (common_scanmap[code] === undefined)
      {
          if (navigator.userAgent.indexOf("Firefox") != -1)
              return firefox_scanmap[code];
          else
              return DOM_scanmap[code];
      }
      else
          return common_scanmap[code];
  }
  
  function keycode_to_start_scan(code)
  {
      var scancode = get_scancode(code);
      if (scancode === undefined)
      {
          alert('no map for ' + code);
          return 0;
      }
  
      if (scancode < 0x100) {
          return scancode;
      } else {
          return 0xe0 | ((scancode - 0x100) << 8);
      }
  }
  
  function keycode_to_end_scan(code)
  {
      var scancode = get_scancode(code);
      if (scancode === undefined)
          return 0;
  
      if (scancode < 0x100) {
          return scancode | 0x80;
      } else {
          return 0x80e0 | ((scancode - 0x100) << 8);
      }
  }