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August 30, 2023 01:39
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Cross browser caretRangeFromPoint
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//demo: http://jsfiddle.net/heZ4z/ | |
if (document.addEventListener) { // standard | |
document.addEventListener('click', function onclick(e) { | |
var r; | |
if (document.caretRangeFromPoint) { // standard (WebKit) | |
r = document.caretRangeFromPoint(e.pageX, e.pageY); | |
} else if (e.rangeParent) { // Mozilla | |
r = document.createRange(); | |
r.setStart(e.rangeParent, e.rangeOffset); | |
} | |
var t = r.startContainer; // should be a text node | |
var s = r.startOffset; // number of chars from the start of text | |
var e = s; | |
while (s > 0) { | |
s -= 1; | |
r.setStart(t, s); | |
if (/^\s/.test(r.toString())) { | |
r.setStart(t, s += 1); | |
break; | |
} | |
} | |
var l = t.nodeValue.length; | |
while (e < l) { | |
e += 1; | |
r.setEnd(t, e); | |
if (/\s$/.test(r.toString())) { | |
r.setEnd(t, e -= 1); | |
break; | |
} | |
} | |
window.getSelection().addRange(r); | |
alert(r.toString()); | |
}, false); | |
} else if (document.attachEvent) { // IE | |
document.attachEvent('onclick', function onclick(e) { | |
if (!e) e = window.event; | |
if (document.selection && document.selection.createRange) { | |
var r = document.selection.createRange(); | |
r.moveToPoint(e.x, e.y); | |
r.moveStart('word', -1); | |
if (/^\s/.test(r.text)) r.moveStart('character', 1); | |
r.moveEnd('word', 1); | |
if (/\s$/.test(r.text)) r.moveEnd('character', -1); | |
r.select(); | |
alert(r.text); | |
} | |
}); | |
} |
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