text: "use strict";
  
  /** @const */
  export var SHIFT_SCAN_CODE = 0x2A;
  
  /** @const */
  export var SCAN_CODE_RELEASE = 0x80;
  
  /**
   * @constructor
   *
   * @param {BusConnector} bus
   */
  export function KeyboardAdapter(bus)
  {
      var
          /**
           * @type {!Object.<boolean>}
           */
          keys_pressed = {},
  
          keyboard = this;
  
      /**
       * Set by emulator
       * @type {boolean}
       */
      this.emu_enabled = true;
  
      /**
       * Format:
       * Javascript event.keyCode -> make code
       * @const
       */
      var charmap = new Uint16Array([
          0, 0, 0, 0,  0, 0, 0, 0,
          // 0x08: backspace, tab, enter
          0x0E, 0x0F, 0, 0,  0, 0x1C, 0, 0,
  
          // 0x10: shift, ctrl, alt, pause, caps lock
          0x2A, 0x1D, 0x38, 0,  0x3A, 0, 0, 0,
  
          // 0x18: escape
          0, 0, 0, 0x01,  0, 0, 0, 0,
  
          // 0x20: spacebar, page down/up, end, home, arrow keys, ins, del
          0x39, 0xE049, 0xE051, 0xE04F,  0xE047, 0xE04B, 0xE048, 0xE04D,
          0x50, 0, 0, 0,  0, 0x52, 0x53, 0,
  
          // 0x30: numbers
          0x0B, 0x02, 0x03, 0x04,  0x05, 0x06, 0x07, 0x08,
          0x09, 0x0A,
  
          // 0x3B: ;= (firefox only)
          0, 0x27, 0, 0x0D, 0, 0,
  
          // 0x40
          0,
  
          // 0x41: letters
          0x1E, 0x30, 0x2E, 0x20, 0x12, 0x21, 0x22, 0x23, 0x17, 0x24, 0x25, 0x26, 0x32,
          0x31, 0x18, 0x19, 0x10, 0x13, 0x1F, 0x14, 0x16, 0x2F, 0x11, 0x2D, 0x15, 0x2C,
  
          // 0x5B: Left Win, Right Win, Menu
          0xE05B, 0xE05C, 0xE05D, 0, 0,
  
          // 0x60: keypad
          0x52, 0x4F, 0x50, 0x51, 0x4B, 0x4C, 0x4D, 0x47,
          0x48, 0x49, 0, 0, 0, 0, 0, 0,
  
          // 0x70: F1 to F12
          0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x57, 0x58,
  
          0, 0, 0, 0,
  
          // 0x80
          0, 0, 0, 0,  0, 0, 0, 0,
          0, 0, 0, 0,  0, 0, 0, 0,
  
          // 0x90: Numlock
          0x45, 0, 0, 0,  0, 0, 0, 0,
          0, 0, 0, 0,     0, 0, 0, 0,
  
          // 0xA0: - (firefox only)
          0, 0, 0, 0,  0, 0, 0, 0,
          0, 0, 0, 0,  0, 0x0C, 0, 0,
  
          // 0xB0
          // ,
          0, 0, 0, 0,  0, 0, 0, 0,
          0, 0, 0x27, 0x0D,  0x33, 0x0C, 0x34, 0x35,
  
          // 0xC0
          // `
          0x29, 0, 0, 0,  0, 0, 0, 0,
          0, 0, 0, 0,     0, 0, 0, 0,
  
          // 0xD0
          // [']\
          0, 0, 0, 0,     0, 0, 0, 0,
          0, 0, 0, 0x1A,  0x2B, 0x1B, 0x28, 0,
  
          // 0xE0
          // Apple key on Gecko, Right alt
          0xE05B, 0xE038, 0, 0,  0, 0, 0, 0,
          0, 0, 0, 0,            0, 0, 0, 0,
      ]);
  
  
      /**
       * ascii -> javascript event code (US layout)
       * @const
       */
      var asciimap = {8: 8, 10: 13, 32: 32, 39: 222, 44: 188, 45: 189, 46: 190, 47: 191, 48: 48, 49: 49, 50: 50, 51: 51, 52: 52, 53: 53, 54: 54, 55: 55, 56: 56, 57: 57, 59: 186, 61: 187, 91: 219, 92: 220, 93: 221, 96: 192, 97: 65, 98: 66, 99: 67, 100: 68, 101: 69, 102: 70, 103: 71, 104: 72, 105: 73, 106: 74, 107: 75, 108: 76, 109: 77, 110: 78, 111: 79, 112: 80, 113: 81, 114: 82, 115: 83, 116: 84, 117: 85, 118: 86, 119: 87, 120: 88, 121: 89, 122: 90};
      var asciimap_shift = {33: 49, 34: 222, 35: 51, 36: 52, 37: 53, 38: 55, 40: 57, 41: 48, 42: 56, 43: 187, 58: 186, 60: 188, 62: 190, 63: 191, 64: 50, 65: 65, 66: 66, 67: 67, 68: 68, 69: 69, 70: 70, 71: 71, 72: 72, 73: 73, 74: 74, 75: 75, 76: 76, 77: 77, 78: 78, 79: 79, 80: 80, 81: 81, 82: 82, 83: 83, 84: 84, 85: 85, 86: 86, 87: 87, 88: 88, 89: 89, 90: 90, 94: 54, 95: 189, 123: 219, 124: 220, 125: 221, 126: 192};
  
      // From:
      // https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code#Code_values_on_Linux_%28X11%29_%28When_scancode_is_available%29
      // http://stanislavs.org/helppc/make_codes.html
      // http://www.computer-engineering.org/ps2keyboard/scancodes1.html
      //
      // Mapping from event.code to scancode
      var codemap = {
          "Escape": 0x0001,
          "Digit1": 0x0002,
          "Digit2": 0x0003,
          "Digit3": 0x0004,
          "Digit4": 0x0005,
          "Digit5": 0x0006,
          "Digit6": 0x0007,
          "Digit7": 0x0008,
          "Digit8": 0x0009,
          "Digit9": 0x000a,
          "Digit0": 0x000b,
          "Minus": 0x000c,
          "Equal": 0x000d,
          "Backspace": 0x000e,
          "Tab": 0x000f,
          "KeyQ": 0x0010,
          "KeyW": 0x0011,
          "KeyE": 0x0012,
          "KeyR": 0x0013,
          "KeyT": 0x0014,
          "KeyY": 0x0015,
          "KeyU": 0x0016,
          "KeyI": 0x0017,
          "KeyO": 0x0018,
          "KeyP": 0x0019,
          "BracketLeft": 0x001a,
          "BracketRight": 0x001b,
          "Enter": 0x001c,
          "ControlLeft": 0x001d,
          "KeyA": 0x001e,
          "KeyS": 0x001f,
          "KeyD": 0x0020,
          "KeyF": 0x0021,
          "KeyG": 0x0022,
          "KeyH": 0x0023,
          "KeyJ": 0x0024,
          "KeyK": 0x0025,
          "KeyL": 0x0026,
          "Semicolon": 0x0027,
          "Quote": 0x0028,
          "Backquote": 0x0029,
          "ShiftLeft": 0x002a,
          "Backslash": 0x002b,
          "KeyZ": 0x002c,
          "KeyX": 0x002d,
          "KeyC": 0x002e,
          "KeyV": 0x002f,
          "KeyB": 0x0030,
          "KeyN": 0x0031,
          "KeyM": 0x0032,
          "Comma": 0x0033,
          "Period": 0x0034,
          "Slash": 0x0035,
          "ShiftRight": 0x0036,
          "NumpadMultiply": 0x0037,
          "AltLeft": 0x0038,
          "Space": 0x0039,
          "CapsLock": 0x003a,
          "F1": 0x003b,
          "F2": 0x003c,
          "F3": 0x003d,
          "F4": 0x003e,
          "F5": 0x003f,
          "F6": 0x0040,
          "F7": 0x0041,
          "F8": 0x0042,
          "F9": 0x0043,
          "F10": 0x0044,
          "NumLock": 0x0045,
          "ScrollLock": 0x0046,
          "Numpad7": 0x0047,
          "Numpad8": 0x0048,
          "Numpad9": 0x0049,
          "NumpadSubtract": 0x004a,
          "Numpad4": 0x004b,
          "Numpad5": 0x004c,
          "Numpad6": 0x004d,
          "NumpadAdd": 0x004e,
          "Numpad1": 0x004f,
          "Numpad2": 0x0050,
          "Numpad3": 0x0051,
          "Numpad0": 0x0052,
          "NumpadDecimal": 0x0053,
          "IntlBackslash": 0x0056,
          "F11": 0x0057,
          "F12": 0x0058,
  
          "NumpadEnter": 0xe01c,
          "ControlRight": 0xe01d,
          "NumpadDivide": 0xe035,
          //"PrintScreen": 0x0063,
          "AltRight": 0xe038,
          "Home": 0xe047,
          "ArrowUp": 0xe048,
          "PageUp": 0xe049,
          "ArrowLeft": 0xe04b,
          "ArrowRight": 0xe04d,
          "End": 0xe04f,
          "ArrowDown": 0xe050,
          "PageDown": 0xe051,
          "Insert": 0xe052,
          "Delete": 0xe053,
  
          "OSLeft": 0xe05b,
          "OSRight": 0xe05c,
          "ContextMenu": 0xe05d,
      };
  
      this.bus = bus;
  
      this.destroy = function()
      {
          if(typeof window !== "undefined")
          {
              window.removeEventListener("keyup", keyup_handler, false);
              window.removeEventListener("keydown", keydown_handler, false);
              window.removeEventListener("blur", blur_handler, false);
          }
      };
  
      this.init = function()
      {
          if(typeof window === "undefined")
          {
              return;
          }
          this.destroy();
  
          window.addEventListener("keyup", keyup_handler, false);
          window.addEventListener("keydown", keydown_handler, false);
          window.addEventListener("blur", blur_handler, false);
      };
      this.init();
  
      this.simulate_press = function(code)
      {
          var ev = { keyCode: code };
          handler(ev, true);
          handler(ev, false);
      };
  
      this.simulate_char = function(chr)
      {
          var code = chr.charCodeAt(0);
  
          if(code in asciimap)
          {
              this.simulate_press(asciimap[code]);
          }
          else if(code in asciimap_shift)
          {
              send_to_controller(SHIFT_SCAN_CODE);
              this.simulate_press(asciimap_shift[code]);
              send_to_controller(SHIFT_SCAN_CODE | SCAN_CODE_RELEASE);
          }
          else
          {
              console.log("ascii -> keyCode not found: ", code, chr);
          }
      };
  
      function may_handle(e)
      {
          if(e.shiftKey && e.ctrlKey && (e.keyCode === 73 || e.keyCode === 74 || e.keyCode === 75))
          {
                // don't prevent opening chromium dev tools
                // maybe add other important combinations here, too
                return false;
          }
  
          if(!keyboard.emu_enabled)
          {
              return false;
          }
  
          if(e.target)
          {
              // className shouldn't be hardcoded here
              return e.target.classList.contains("phone_keyboard") ||
                  (e.target.nodeName !== "INPUT" && e.target.nodeName !== "TEXTAREA");
          }
          else
          {
              return true;
          }
      }
  
      function translate(e)
      {
          if(e.code !== undefined)
          {
              var code = codemap[e.code];
  
              if(code !== undefined)
              {
                  return code;
              }
          }
  
          return charmap[e.keyCode];
      }
  
      function keyup_handler(e)
      {
          if(!e.altKey && keys_pressed[0x38])
          {
              // trigger ALT keyup manually - some browsers don't
              // see issue #165
              handle_code(0x38, false);
          }
          return handler(e, false);
      }
  
      function keydown_handler(e)
      {
          if(!e.altKey && keys_pressed[0x38])
          {
              // trigger ALT keyup manually - some browsers don't
              // see issue #165
              handle_code(0x38, false);
          }
          return handler(e, true);
      }
  
      function blur_handler(e)
      {
          // trigger keyup for all pressed keys
          var keys = Object.keys(keys_pressed),
              key;
  
          for(var i = 0; i < keys.length; i++)
          {
              key = +keys[i];
  
              if(keys_pressed[key])
              {
                  handle_code(key, false);
              }
          }
  
          keys_pressed = {};
      }
  
      /**
       * @param {boolean} keydown
       */
      function handler(e, keydown)
      {
          if(!keyboard.bus)
          {
              return;
          }
  
          if(!may_handle(e))
          {
              return;
          }
  
          var code = translate(e);
  
          if(!code)
          {
              console.log("Missing char in map: keyCode=" + (e.keyCode || -1).toString(16) + " code=" + e.code);
              return;
          }
  
          handle_code(code, keydown, e.repeat);
  
          e.preventDefault && e.preventDefault();
  
          return false;
      }
  
      /**
       * @param {number} code
       * @param {boolean} keydown
       * @param {boolean=} is_repeat
       */
      function handle_code(code, keydown, is_repeat)
      {
          if(keydown)
          {
              if(keys_pressed[code] && !is_repeat)
              {
                  handle_code(code, false);
              }
          }
          else
          {
              if(!keys_pressed[code])
              {
                  // stray keyup
                  return;
              }
          }
  
          keys_pressed[code] = keydown;
  
          if(!keydown)
          {
              code |= 0x80;
          }
          //console.log("Key: " + code.toString(16) + " from " + chr.toString(16) + " down=" + keydown);
  
          if(code > 0xFF)
          {
              // prefix
              send_to_controller(code >> 8);
              send_to_controller(code & 0xFF);
          }
          else
          {
              send_to_controller(code);
          }
      }
  
      function send_to_controller(code)
      {
          keyboard.bus.send("keyboard-code", code);
      }
  }
  
  