Бросил я затею с вытаскиванием плагина find из CKEditor, начал сам писать, вот какие страсти получаются:
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<title>Untitled Document</title>
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<span style="text-decoration: underline; color: #00f; cursor: pointer">Click to find and select «mpden-Sydney College in Virg»</span>
<p>It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance.</p>
<script type="text/javascript">
function $Finder(node) {
this.node = node;
this.findTextNodes();
this.calcCharacterIntervals();
}
$Finder.prototype = {
constructor: $Finder,
node: null,
textNodes: [],
characterIntervals: [],
resultIndex: -1,
result: null,
find: function (text) {
var length = this.textNodes.length, i = 0;
if (!length) {
return false;
}
var startContainer, endContainer = this.textNodes[0], startOffset, endOffset, charOffset, str = endContainer.nodeValue, index;
while (i in this.textNodes) {
if (str.indexOf(text) == -1) {
endContainer = this.textNodes[++i];
if (!endContainer) {
return false;
}
str += endContainer.nodeValue;
} else {
startOffset = endContainer.nodeValue.indexOf(text);
if (startOffset != -1) {
startContainer = endContainer;
endOffset = startOffset + text.length;
charOffset = str.length - (startContainer.nodeValue.length - startOffset);
break;
} else {
endOffset = this.calcEndOffset(endContainer.nodeValue, text);
index = str.length - (endContainer.nodeValue.length - 1) - (text.length - endOffset);
startContainer = this.textNodes[this.findTextNodeIndexByCharPos(index)];
startOffset = this.calcStartOffset(startContainer.nodeValue, text);
charOffset = index - (text.length - endOffset);
break;
}
return false;
}
}
return this.result = {
charOffset: charOffset,
startContainer: startContainer,
startOffset: startOffset,
endContainer: endContainer,
endOffset: endOffset
};
},
calcStartOffset: function (nodeValue, text) {
while (text && nodeValue.lastIndexOf(text) != 0) {
text = text.slice(0, -1);
}
return nodeValue.length - text.length;
},
calcEndOffset: function (nodeValue, text) {
while (nodeValue.indexOf(text) == -1) {
text = text.slice(1);
}
return text.length;
},
findTextNodeIndexByCharPos: function (position) {
for (var i = 0; i < this.characterIntervals.length; i++){
if (position <= this.characterIntervals[i]) {
return i;
}
}
},
calcCharacterIntervals: function () {
var i, interval = 0;
for (i = 0; i < this.textNodes.length; i++) {
interval += this.textNodes[i].nodeValue.length;
this.characterIntervals[i] = interval;
}
},
findTextNodes: function () {
var TEXT_NODE = 3, textNodes = [], j = 0;
(function (element) {
var node, nodes = element.childNodes, length = nodes.length, i = -1;
while (++i < length) {
node = nodes[i];
if (node.nodeType == TEXT_NODE) {
textNodes[j++] = node;
} else if(node.hasChildNodes()) {
arguments.callee(node);
}
}
})(this.node);
this.textNodes = textNodes;
}
};
document.getElementsByTagName("span")[0].onclick = function () {
var textBlock = document.getElementsByTagName("p")[0];
var text = "mpden-Sydney College in Virg";
var pos = new $Finder(textBlock).find(text);
var range;
if (pos) {
if ("selection" in document) {
range = document.selection.createRange();
range.moveToElementText(textBlock);
var range1 = range.duplicate();
range.moveStart("character", pos.charOffset);
range1.moveStart("character", pos.charOffset + text.length);
range.setEndPoint("EndToStart", range1);
range.select();
} else {
range = document.createRange();
range.setStart(pos.startContainer, pos.startOffset);
range.setEnd(pos.endContainer, pos.endOffset);
var sel = getSelection();
sel.removeAllRanges();
sel.addRange(range);
}
}
};
</script>
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Еще нужно сделать findNext. И выделение иногда неправильное
