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(function() {
var KeyEvent = function(data, type) {
this.keyCode = 'keyCode' in data ? data.keyCode : 0;
this.charCode = 'charCode' in data ? data.charCode : 0;
var modifiers = 'modifiers' in data ? data.modifiers : [];
this.ctrlKey = false;
this.metaKey = false;
this.altKey = false;
this.shiftKey = false;
for (var i = 0; i < modifiers.length; i++) {
this[modifiers[i] + 'Key'] = true;
}
this.type = type || 'keypress';
};
KeyEvent.prototype.toNative = function() {
var event = document.createEventObject ? document.createEventObject() : document.createEvent('Events');
if (event.initEvent) {
event.initEvent(this.type, true, true);
}
event.keyCode = this.keyCode;
event.which = this.charCode || this.keyCode;
event.shiftKey = this.shiftKey;
event.metaKey = this.metaKey;
event.altKey = this.altKey;
event.ctrlKey = this.ctrlKey;
return event;
};
KeyEvent.prototype.fire = function(element) {
var event = this.toNative();
if (element.dispatchEvent) {
element.dispatchEvent(event);
return;
}
element.fireEvent('on' + this.type, event);
};
// simulates complete key event as if the user pressed the key in the browser
// triggers a keydown, then a keypress, then a keyup
KeyEvent.simulate = function(charCode, keyCode, modifiers, element, repeat) {
if (modifiers === undefined) {
modifiers = [];
}
if (element === undefined) {
element = document;
}
if (repeat === undefined) {
repeat = 1;
}
var modifierToKeyCode = {
'shift': 16,
'ctrl': 17,
'alt': 18,
'meta': 91
};
// if the key is a modifier then take it out of the regular
// keypress/keydown
if (keyCode == 16 || keyCode == 17 || keyCode == 18 || keyCode == 91) {
repeat = 0;
}
var modifiersToInclude = [];
var keyEvents = [];
// modifiers would go down first
for (var i = 0; i < modifiers.length; i++) {
modifiersToInclude.push(modifiers[i]);
keyEvents.push(new KeyEvent({
charCode: 0,
keyCode: modifierToKeyCode[modifiers[i]],
modifiers: modifiersToInclude
}, 'keydown'));
}
// @todo factor in duration for these
while (repeat > 0) {
keyEvents.push(new KeyEvent({
charCode: 0,
keyCode: keyCode,
modifiers: modifiersToInclude
}, 'keydown'));
keyEvents.push(new KeyEvent({
charCode: charCode,
keyCode: charCode,
modifiers: modifiersToInclude
}, 'keypress'));
repeat--;
}
keyEvents.push(new KeyEvent({
charCode: 0,
keyCode: keyCode,
modifiers: modifiersToInclude
}, 'keyup'));
// now lift up the modifier keys
for (i = 0; i < modifiersToInclude.length; i++) {
var modifierKeyCode = modifierToKeyCode[modifiersToInclude[i]];
modifiersToInclude.splice(i, 1);
keyEvents.push(new KeyEvent({
charCode: 0,
keyCode: modifierKeyCode,
modifiers: modifiersToInclude
}, 'keyup'));
}
for (i = 0; i < keyEvents.length; i++) {
// console.log('firing', keyEvents[i].type, keyEvents[i].keyCode, keyEvents[i].charCode);
keyEvents[i].fire(element);
}
};
window.KeyEvent = KeyEvent;
}) ();
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