bFlat.prototype.getTextContent = function(o) {
if (typeof(o.textContent) != "undefined")
return o.textContent;
else if (typeof(o.innerText) != "undefined")
return o.innerText;
else if (o.nodeName == '#text')
return o.data;
else
return "";
}
bFlat.prototype.setTextContent = function(o, textVal) {
if (typeof(o.textContent) != "undefined")
o.textContent = textVal;
else if (typeof(o.innerText) != "undefined")
o.innerText = textVal;
else if (o.nodeName == '#text')
o.data = textVal;
}
bFlat.prototype.blow = function() {
this.totalLens = this.nonWhitespaceTextLength(this.replace_element);
this.newSquash();
this.squashText(this.replace_element);
}
bFlat.prototype.zzz = function(n)
{ var str = ''; while (n--) { str += 'Z'; } return str; };
bFlat.prototype.Bzzz = function(n)
{ return 'B' + this.zzz(n - 1); };
bFlat.prototype.nonWhitespaceTextLength =
function(o) {
if (!o) o = this.replace_element;
var elemText = bFlat.prototype.getTextContent(o);
var textLen = elemText.length;
// Disregard whitespace-only elements
if (elemText.strip().length == 0) {
textLen = 0;
}
if (o.childNodes.length) {
textLen = 0;
$A(o.childNodes).each(function(child) {
textLen += bFlat.prototype.nonWhitespaceTextLength(child);
});
}
return textLen;
};
bFlat.prototype.newSquash =
function() {
// Skip past the stuff that was just replaced
this.replaceAtLen += this.lenReplace;
// Replace at least 100 characters, plus up to 1/8th of total text
//  but only a few characters if this is the first time
if (this.lenReplace) {
this.lenReplace = 100 + Math.floor((Math.random() * (this.totalLens + 1) / 8));
} else {
this.lenReplace = 100 + Math.floor(Math.random() * 50);
}
// Replace starting between 0 and 20% of the total text from here
this.replaceAtLen += Math.floor((Math.random() * (this.totalLens + 1) / 5));
this.replaceStr = this.Bzzz(this.lenReplace);
};
bFlat.prototype.squashText =
function(o) {
if (o.childNodes.length) {
var bindSquash = this.squashText.bind(this);
$A(o.childNodes).each(bindSquash);
return;
}
var origText = this.getTextContent(o);
var addLen = origText.length;
// Disregard whitespace-only elements
if (origText.strip().length == 0) {
return;
}
if (this.curLen + addLen > this.replaceAtLen &&
this.curLen < this.replaceAtLen + this.lenReplace) {
var startText = '';
var endText = '';
var newText;
// By default, presume we're starting at the start of the
//  replacement string and replacing this whole text node
var replaceStart = 0;
var replaceNum = addLen;
// If we've already printed some of the replacement string,
//  skip past the already-used parts
if (this.curLen > this.replaceAtLen) {
replaceStart = this.curLen - this.replaceAtLen;
}
// If there is more replacement string than there is room
//  for in this text node, don't print it all
if (this.replaceAtLen - this.curLen + replaceNum > addLen) {
replaceNum = addLen - replaceStart;
}
newText = this.replaceStr.substr(replaceStart, replaceNum);
if (this.curLen < this.replaceAtLen) {
startText = origText.substr(0, this.replaceAtLen - this.curLen);
// Add dash if we're interrupting
if (startText.substr(-1).search(/\S/) != -1) {
startText += this.mdash;
}
} else if (this.curLen - this.replaceAtLen + addLen > this.lenReplace) {
endText = origText.substr(this.lenReplace - this.curLen + this.replaceAtLen);
}
// Add soft hyphens in all inserted text so it doesn''t stretch
//  the screen obnoxiously
newText = newText.replace(/(.)/g, "$1" + this.shy);
this.setTextContent(o, startText + newText + endText);
}
this.curLen += addLen;
if (this.curLen > this.replaceAtLen + this.lenReplace) {
this.newSquash();
}
};
function bFlat(replace_element) {
this.replace_element = replace_element;
this.shy = String.fromCharCode(173);
this.mdash = String.fromCharCode(8212);
this.curLen = 0;
this.replaceStr = 'BZZZ';
this.replaceAtLen = 100;
this.lenReplace = 0;
}
function flatify(buttonClicked) {
// Element is not automatically extended in IE when called from onClick handler
buttonClicked = Element.extend(buttonClicked);
var wu_div = buttonClicked.ancestors().find(
function(o) { return o.hasClassName('item') }
);
var wu_content = wu_div.select('.content').first();
var musical = new bFlat(wu_content);
musical.blow();
}