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keyboard.js
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keyboard.js
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module.exports = Keyboard;
function Keyboard(events) {
this._events = events;
this.activate();
}
Keyboard.prototype.activate = function () {
this._gotoSlideNumber = '';
this.addKeyboardEventListeners();
};
Keyboard.prototype.deactivate = function () {
this.removeKeyboardEventListeners();
};
Keyboard.prototype.addKeyboardEventListeners = function () {
var self = this;
var events = this._events;
events.on('keydown', function (event) {
if (event.metaKey || event.ctrlKey || event.altKey) {
// Bail out if alt, meta or ctrl key was pressed
return;
}
switch (event.keyCode) {
case 33: // Page up
case 37: // Left
case 38: // Up
events.emit('gotoPreviousSlide');
break;
case 32: // Space
if(event.shiftKey){ // Shift+Space
events.emit('gotoPreviousSlide');
}else{
events.emit('gotoNextSlide');
}
break;
case 34: // Page down
case 39: // Right
case 40: // Down
events.emit('gotoNextSlide');
break;
case 36: // Home
events.emit('gotoFirstSlide');
break;
case 35: // End
events.emit('gotoLastSlide');
break;
case 27: // Escape
events.emit('hideOverlay');
break;
case 13: // Return
if (self._gotoSlideNumber) {
events.emit('gotoSlideNumber', self._gotoSlideNumber);
self._gotoSlideNumber = '';
}
break;
}
});
events.on('keypress', function (event) {
if (event.metaKey || event.ctrlKey) {
// Bail out if meta or ctrl key was pressed
return;
}
var key = String.fromCharCode(event.which).toLowerCase();
var tryToPreventDefault = true;
switch (key) {
case 'j':
events.emit('gotoNextSlide');
break;
case 'k':
events.emit('gotoPreviousSlide');
break;
case 'b':
events.emit('toggleBlackout');
break;
case 'm':
events.emit('toggleMirrored');
break;
case 'c':
events.emit('createClone');
break;
case 'p':
events.emit('togglePresenterMode');
break;
case 'f':
events.emit('toggleFullscreen');
break;
case 's':
events.emit('toggleTimer');
break;
case 't':
events.emit('resetTimer');
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '0':
self._gotoSlideNumber += key;
break;
case 'h':
case '?':
events.emit('toggleHelp');
break;
default:
tryToPreventDefault = false;
}
if (tryToPreventDefault && event && event.preventDefault)
event.preventDefault();
});
};
Keyboard.prototype.removeKeyboardEventListeners = function () {
var events = this._events;
events.removeAllListeners("keydown");
events.removeAllListeners("keypress");
};