ShareJS attachSelect
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// code that allows attaching ShareJS to HTML <select> fields | |
sharejs.Doc.prototype.attachSelect = function (innerElem, ctx) { | |
var i; | |
var rawValue = innerElem.value; | |
var elem = { | |
get value () { | |
return rawValue; | |
}, | |
set value (v) { | |
rawValue = v; | |
innerElem.value = v; | |
} | |
}; | |
var eventFuncs = ['addEventListener', 'attachEvent', 'removeEventListener', 'detachEvent']; | |
for (i = 0; i < eventFuncs.length; ++i) { | |
if (innerElem[eventFuncs[i]]) { | |
elem[eventFuncs[i]] = innerElem[eventFuncs[i]].bind(innerElem); | |
} | |
} | |
var changeHandler = function () { | |
rawValue = innerElem.value; | |
innerElem.dispatchEvent(new Event('textInput')); | |
}; | |
var delayedChangeHandler = function () { | |
setTimeout(changeHandler, 0); | |
}; | |
var addEvent = function (event, handler) { | |
if (innerElem.addEventListener) { | |
innerElem.addEventListener(event, handler, false); | |
} else { | |
innerElem.attachEvent('on' + event, handler); | |
} | |
}; | |
var removeEvent = function (event, handler) { | |
if (innerElem.removeEventListener) { | |
innerElem.removeEventListener(event, handler, false); | |
} else { | |
innerElem.detachEvent('on' + event, handler); | |
} | |
}; | |
addEvent('change', changeHandler); | |
addEvent('keyup', changeHandler); | |
addEvent('keydown', delayedChangeHandler); | |
if (!ctx) { | |
ctx = this.createContext(); | |
} | |
ctx.detach = function () { | |
removeEvent('change', changeHandler); | |
removeEvent('keyup', changeHandler); | |
removeEvent('keydown', delayedChangeHandler); | |
}; | |
return this.attachTextarea(elem, ctx); | |
}; |
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