text: /*
   * noVNC: HTML5 VNC client
   * Copyright (C) 2012 Joel Martin
   * Copyright (C) 2013 Samuel Mannehed for Cendio AB
   * Licensed under MPL 2.0 or any later version (see LICENSE.txt)
   */
  
  /*jslint browser: true, white: false */
  /*global window, Util */
  
  var Keyboard, Mouse;
  
  (function () {
      "use strict";
  
      //
      // Keyboard event handler
      //
  
      Keyboard = function (defaults) {
          this._keyDownList = [];         // List of depressed keys
                                          // (even if they are happy)
  
          Util.set_defaults(this, defaults, {
              'target': document,
              'focused': true
          });
  
          // create the keyboard handler
          this._handler = new KeyEventDecoder(kbdUtil.ModifierSync(),
              VerifyCharModifier( /* jshint newcap: false */
                  TrackKeyState(
                      EscapeModifiers(this._handleRfbEvent.bind(this))
                  )
              )
          ); /* jshint newcap: true */
  
          // keep these here so we can refer to them later
          this._eventHandlers = {
              'keyup': this._handleKeyUp.bind(this),
              'keydown': this._handleKeyDown.bind(this),
              'keypress': this._handleKeyPress.bind(this),
              'blur': this._allKeysUp.bind(this)
          };
      };
  
      Keyboard.prototype = {
          // private methods
  
          _handleRfbEvent: function (e) {
              if (this._onKeyPress) {
                  Util.Debug("onKeyPress " + (e.type == 'keydown' ? "down" : "up") +
                             ", keysym: " + e.keysym.keysym + "(" + e.keysym.keyname + ")");
                  this._onKeyPress(e.keysym.keysym, e.type == 'keydown');
              }
          },
  
          _handleKeyDown: function (e) {
              if (!this._focused) { return true; }
  
              if (this._handler.keydown(e)) {
                  // Suppress bubbling/default actions
                  Util.stopEvent(e);
                  return false;
              } else {
                  // Allow the event to bubble and become a keyPress event which
                  // will have the character code translated
                  return true;
              }
          },
  
          _handleKeyPress: function (e) {
              if (!this._focused) { return true; }
  
              if (this._handler.keypress(e)) {
                  // Suppress bubbling/default actions
                  Util.stopEvent(e);
                  return false;
              } else {
                  // Allow the event to bubble and become a keyPress event which
                  // will have the character code translated
                  return true;
              }
          },
  
          _handleKeyUp: function (e) {
              if (!this._focused) { return true; }
  
              if (this._handler.keyup(e)) {
                  // Suppress bubbling/default actions
                  Util.stopEvent(e);
                  return false;
              } else {
                  // Allow the event to bubble and become a keyPress event which
                  // will have the character code translated
                  return true;
              }
          },
  
          _allKeysUp: function () {
              Util.Debug(">> Keyboard.allKeysUp");
              this._handler.releaseAll();
              Util.Debug("<< Keyboard.allKeysUp");
          },
  
          // Public methods
  
          grab: function () {
              //Util.Debug(">> Keyboard.grab");
              var c = this._target;
  
              Util.addEvent(c, 'keydown', this._eventHandlers.keydown);
              Util.addEvent(c, 'keyup', this._eventHandlers.keyup);
              Util.addEvent(c, 'keypress', this._eventHandlers.keypress);
  
              // Release (key up) if window loses focus
              Util.addEvent(window, 'blur', this._eventHandlers.blur);
  
              //Util.Debug("<< Keyboard.grab");
          },
  
          ungrab: function () {
              //Util.Debug(">> Keyboard.ungrab");
              var c = this._target;
  
              Util.removeEvent(c, 'keydown', this._eventHandlers.keydown);
              Util.removeEvent(c, 'keyup', this._eventHandlers.keyup);
              Util.removeEvent(c, 'keypress', this._eventHandlers.keypress);
              Util.removeEvent(window, 'blur', this._eventHandlers.blur);
  
              // Release (key up) all keys that are in a down state
              this._allKeysUp();
  
              //Util.Debug(">> Keyboard.ungrab");
          },
  
          sync: function (e) {
              this._handler.syncModifiers(e);
          }
      };
  
      Util.make_properties(Keyboard, [
          ['target',     'wo', 'dom'],  // DOM element that captures keyboard input
          ['focused',    'rw', 'bool'], // Capture and send key events
  
          ['onKeyPress', 'rw', 'func'] // Handler for key press/release
      ]);
  
      //
      // Mouse event handler
      //
  
      Mouse = function (defaults) {
          this._mouseCaptured  = false;
  
          this._doubleClickTimer = null;
          this._lastTouchPos = null;
  
          // Configuration attributes
          Util.set_defaults(this, defaults, {
              'target': document,
              'focused': true,
              'scale': 1.0,
              'touchButton': 1
          });
  
          this._eventHandlers = {
              'mousedown': this._handleMouseDown.bind(this),
              'mouseup': this._handleMouseUp.bind(this),
              'mousemove': this._handleMouseMove.bind(this),
              'mousewheel': this._handleMouseWheel.bind(this),
              'mousedisable': this._handleMouseDisable.bind(this)
          };
      };
  
      Mouse.prototype = {
          // private methods
          _captureMouse: function () {
              // capturing the mouse ensures we get the mouseup event
              if (this._target.setCapture) {
                  this._target.setCapture();
              }
  
              // some browsers give us mouseup events regardless,
              // so if we never captured the mouse, we can disregard the event
              this._mouseCaptured = true;
          },
  
          _releaseMouse: function () {
              if (this._target.releaseCapture) {
                  this._target.releaseCapture();
              }
              this._mouseCaptured = false;
          },
  
          _resetDoubleClickTimer: function () {
              this._doubleClickTimer = null;
          },
  
          _handleMouseButton: function (e, down) {
              if (!this._focused) { return true; }
  
              if (this._notify) {
                  this._notify(e);
              }
  
              var evt = (e ? e : window.event);
              var pos = Util.getEventPosition(e, this._target, this._scale);
  
              var bmask;
              if (e.touches || e.changedTouches) {
                  // Touch device
  
                  // When two touches occur within 500 ms of each other and are
                  // close enough together a double click is triggered.
                  if (down == 1) {
                      if (this._doubleClickTimer === null) {
                          this._lastTouchPos = pos;
                      } else {
                          clearTimeout(this._doubleClickTimer);
  
                          // When the distance between the two touches is small enough
                          // force the position of the latter touch to the position of
                          // the first.
  
                          var xs = this._lastTouchPos.x - pos.x;
                          var ys = this._lastTouchPos.y - pos.y;
                          var d = Math.sqrt((xs * xs) + (ys * ys));
  
                          // The goal is to trigger on a certain physical width, the
                          // devicePixelRatio brings us a bit closer but is not optimal.
                          var threshold = 20 * (window.devicePixelRatio || 1);
                          if (d < threshold) {
                              pos = this._lastTouchPos;
                          }
                      }
                      this._doubleClickTimer = setTimeout(this._resetDoubleClickTimer.bind(this), 500);
                  }
                  bmask = this._touchButton;
                  // If bmask is set
              } else if (evt.which) {
                  /* everything except IE */
                  bmask = 1 << evt.button;
              } else {
                  /* IE including 9 */
                  bmask = (evt.button & 0x1) +      // Left
                          (evt.button & 0x2) * 2 +  // Right
                          (evt.button & 0x4) / 2;   // Middle
              }
  
              if (this._onMouseButton) {
                  Util.Debug("onMouseButton " + (down ? "down" : "up") +
                             ", x: " + pos.x + ", y: " + pos.y + ", bmask: " + bmask);
                  this._onMouseButton(pos.x, pos.y, down, bmask);
              }
              Util.stopEvent(e);
              return false;
          },
  
          _handleMouseDown: function (e) {
              this._captureMouse();
              this._handleMouseButton(e, 1);
          },
  
          _handleMouseUp: function (e) {
              if (!this._mouseCaptured) { return; }
  
              this._handleMouseButton(e, 0);
              this._releaseMouse();
          },
  
          _handleMouseWheel: function (e) {
              if (!this._focused) { return true; }
  
              if (this._notify) {
                  this._notify(e);
              }
  
              var evt = (e ? e : window.event);
              var pos = Util.getEventPosition(e, this._target, this._scale);
              var wheelData = evt.detail ? evt.detail * -1 : evt.wheelDelta / 40;
              var bmask;
              if (wheelData > 0) {
                  bmask = 1 << 3;
              } else {
                  bmask = 1 << 4;
              }
  
              if (this._onMouseButton) {
                  this._onMouseButton(pos.x, pos.y, 1, bmask);
                  this._onMouseButton(pos.x, pos.y, 0, bmask);
              }
              Util.stopEvent(e);
              return false;
          },
  
          _handleMouseMove: function (e) {
              if (! this._focused) { return true; }
  
              if (this._notify) {
                  this._notify(e);
              }
  
              var evt = (e ? e : window.event);
              var pos = Util.getEventPosition(e, this._target, this._scale);
              if (this._onMouseMove) {
                  this._onMouseMove(pos.x, pos.y);
              }
              Util.stopEvent(e);
              return false;
          },
  
          _handleMouseDisable: function (e) {
              if (!this._focused) { return true; }
  
              var evt = (e ? e : window.event);
              var pos = Util.getEventPosition(e, this._target, this._scale);
  
              /* Stop propagation if inside canvas area */
              if ((pos.realx >= 0) && (pos.realy >= 0) &&
                  (pos.realx < this._target.offsetWidth) &&
                  (pos.realy < this._target.offsetHeight)) {
                  //Util.Debug("mouse event disabled");
                  Util.stopEvent(e);
                  return false;
              }
  
              return true;
          },
  
  
          // Public methods
          grab: function () {
              var c = this._target;
  
  //            if ('ontouchstart' in document.documentElement) {
  //                Util.addEvent(c, 'touchstart', this._eventHandlers.mousedown);
  //                Util.addEvent(window, 'touchend', this._eventHandlers.mouseup);
  //                Util.addEvent(c, 'touchend', this._eventHandlers.mouseup);
  //                Util.addEvent(c, 'touchmove', this._eventHandlers.mousemove);
  //            } else {
                  Util.addEvent(c, 'mousedown', this._eventHandlers.mousedown);
                  Util.addEvent(window, 'mouseup', this._eventHandlers.mouseup);
                  Util.addEvent(c, 'mouseup', this._eventHandlers.mouseup);
                  Util.addEvent(c, 'mousemove', this._eventHandlers.mousemove);
                  Util.addEvent(c, (Util.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel', this._eventHandlers.mousewheel);
  //            }
  
              /* Work around right and middle click browser behaviors */
              Util.addEvent(document, 'click', this._eventHandlers.mousedisable);
              Util.addEvent(document.body, 'contextmenu', this._eventHandlers.mousedisable);
          },
  
          ungrab: function () {
              var c = this._target;
  
  //            if ('ontouchstart' in document.documentElement) {
  //                Util.removeEvent(c, 'touchstart', this._eventHandlers.mousedown);
  //                Util.removeEvent(window, 'touchend', this._eventHandlers.mouseup);
  //                Util.removeEvent(c, 'touchend', this._eventHandlers.mouseup);
  //                Util.removeEvent(c, 'touchmove', this._eventHandlers.mousemove);
  //            } else {
                  Util.removeEvent(c, 'mousedown', this._eventHandlers.mousedown);
                  Util.removeEvent(window, 'mouseup', this._eventHandlers.mouseup);
                  Util.removeEvent(c, 'mouseup', this._eventHandlers.mouseup);
                  Util.removeEvent(c, 'mousemove', this._eventHandlers.mousemove);
                  Util.removeEvent(c, (Util.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel', this._eventHandlers.mousewheel);
  //            }
  
              /* Work around right and middle click browser behaviors */
              Util.removeEvent(document, 'click', this._eventHandlers.mousedisable);
              Util.removeEvent(document.body, 'contextmenu', this._eventHandlers.mousedisable);
  
          }
      };
  
      Util.make_properties(Mouse, [
          ['target',         'ro', 'dom'],   // DOM element that captures mouse input
          ['notify',         'ro', 'func'],  // Function to call to notify whenever a mouse event is received
          ['focused',        'rw', 'bool'],  // Capture and send mouse clicks/movement
          ['scale',          'rw', 'float'], // Viewport scale factor 0.0 - 1.0
  
          ['onMouseButton',  'rw', 'func'],  // Handler for mouse button click/release
          ['onMouseMove',    'rw', 'func'],  // Handler for mouse movement
          ['touchButton',    'rw', 'int']    // Button mask (1, 2, 4) for touch devices (0 means ignore clicks)
      ]);
  })();
  