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widowadjust.js
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// Widow Adjust JS by Nathan C. Ford http://artequalswork.com
wt = {
// default options
opts : {
elements : 'p,li,dd',
chars : 14,
method : 'wordSpacing',
dir : 'pos',
event : 'orientationchange'
},
to : new Array(),
fix : function (opts) {
if (document.readyState === 'complete') wt.init(opts);
wt.bind('load', function () { wt.init(opts); });
},
init : function (opts) {
var m = opts.method;
switch (m) {
case 'padding-right': case 'nbsp': case 'padding-left': case 'word-spacing': case 'letter-spacing' : case undefined :
if (opts.dir == 'neg' && m && m.match('padding')) {
console.log('Invalid method. You cannot use neg with padding.');
} else wt.hunter(opts);
break;
default : console.log('Invalid method. Please use either padding-right, padding-left, word-spacing, or letter-spacing.');
}
},
hunter : function (uopts) {
var opts = new Object();
// overwrite defaults with options from user
if (uopts) {
for(i in wt.opts) {
if (uopts[i]) opts[i] = (i == 'method' && uopts[i].match('-')) ? wt.fixmethod(uopts[i]) : uopts[i];
else opts[i] = wt.opts[i];
}
}
else opts = wt.opts;
if (document.querySelectorAll) {
var eles = document.querySelectorAll(opts.elements),
i = 0;
while (i < eles.length) {
var t = eles[i];
if (t.offsetHeight > wt.getstyle(t, 'line-height', true)) {
// find a textnode longer than chars
var nodes = t.childNodes,
j = nodes.length - 1,
c = false;
while (j >= 0) {
var ntext = wt.text(nodes[j]);
if (ntext != undefined && ntext.length > opts.chars) {
c = nodes[j];
break;
}
j--;
}
t.style[opts.method] = '0';
var ctext = wt.text( c );
if (c) wt.tamer(c, t, ctext, 0, opts);
}
i++;
}
wt.bind(opts.event, function () { wt.onevent(opts); });
}
},
text : function (t) {
return t.innerText || t.textContent;
},
settext : function (e, t) {
if (e.innerText) e.innerText = t;
else e.textContent = t;
},
tamer : function (c, t, text, i, opts) {
var h = t.offsetHeight;
wt.settext(c, text.slice(0, (opts.chars * -1)));
if (t.offsetHeight < h) {
if (opts.method == 'nbsp') wt.settext(c, wt.text( c ) + text.slice((opts.chars * -1)).replace(/\s/g, '\u00a0'));
else {
var inc = (opts.method.match('padding')) ? (i / 10) : (i / 100);
if (opts.dir == 'neg') inc = inc * -1;
t.style[opts.method] = inc + 'em';
wt.settext(c, text);
wt.tamer(c, t, text, i + 1, opts);
}
}
else wt.settext(c, text);
},
onevent : function (opts) {
var to = "'" + opts.elements.replace(/[^a-zA-Z0-9\-\.]/g, '') + "'";
clearTimeout(wt.to[to]);
wt.to[to] = setTimeout(function () { wt.hunter(opts); }, 250);
},
bind : function (e, f) {
if (window.attachEvent) window.attachEvent('on' + e, f );
else window.addEventListener(e, f, true);
},
fixmethod : function (s) {
return s.replace(/-([a-zA-Z])/, function (m) {
return m.replace('-','').toUpperCase();
});
},
getstyle : function (t, s, n) {
var r;
if (t.currentStyle) r = t.currentStyle[s.replace(/-([A-z])/gi, function(a,b) {return b.toUpperCase();})];
else if (window.getComputedStyle) r = document.defaultView.getComputedStyle(t,null).getPropertyValue(s);
if (n) return parseFloat(r);
else return r;
}
};