8 lines
2.7 KiB
JavaScript
8 lines
2.7 KiB
JavaScript
/*
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* Shorten, a jQuery plugin to automatically shorten text to fit in a block or a pre-set width and configure how the text ends.
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* Copyright (C) 2009-2011 Marc Diethelm
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* License: (GPL 3, http://www.gnu.org/licenses/gpl-3.0.txt) see license.txt
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*/
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(function(a){function s(g,c){return c.measureText(g).width}function t(g,c){c.text(g);return c.width()}var q=false,o,j,k;a.fn.shorten=function(){var g={},c=arguments,r=c.callee;if(c.length)if(c[0].constructor==Object)g=c[0];else if(c[0]=="options")return a(this).eq(0).data("shorten-options");else g={width:parseInt(c[0]),tail:c[1]};this.css("visibility","hidden");var h=a.extend({},r.defaults,g);return this.each(function(){var e=a(this),d=e.text(),p=d.length,i,f=a("<span/>").html(h.tail).text(),l={shortened:false, textOverflow:false};i=e.css("float")!="none"?h.width||e.width():h.width||e.parent().width();if(i<0)return true;e.data("shorten-options",h);this.style.display="inline-block";this.style.whiteSpace="nowrap";if(o){var b=a(this),n=document.createElement("canvas");ctx=n.getContext("2d");b.html(n);ctx.font=b.css("font-style")+" "+b.css("font-variant")+" "+b.css("font-weight")+" "+Math.ceil(parseFloat(b.css("font-size")))+"px "+b.css("font-family");j=ctx;k=s}else{b=a('<table style="padding:0; margin:0; border:none; font:inherit;width:auto;zoom:1;position:absolute;"><tr style="padding:0; margin:0; border:none; font:inherit;"><td style="padding:0; margin:0; border:none; font:inherit;white-space:nowrap;"></td></tr></table>'); $td=a("td",b);a(this).html(b);j=$td;k=t}b=k.call(this,d,j);if(b<i){e.text(d);this.style.visibility="visible";e.data("shorten-info",l);return true}h.tooltip&&this.setAttribute("title",d);if(r._native&&!g.width){n=a("<span>"+h.tail+"</span>").text();if(n.length==1&&n.charCodeAt(0)==8230){e.text(d);this.style.overflow="hidden";this.style[r._native]="ellipsis";this.style.visibility="visible";l.shortened=true;l.textOverflow="ellipsis";e.data("shorten-info",l);return true}}f=k.call(this,f,j);i-=f;f=i*1.15; if(b-f>0){f=d.substring(0,Math.ceil(p*(f/b)));if(k.call(this,f,j)>i){d=f;p=d.length}}do{p--;d=d.substring(0,p)}while(k.call(this,d,j)>=i);e.html(a.trim(a("<span/>").text(d).html())+h.tail);this.style.visibility="visible";l.shortened=true;e.data("shorten-info",l);return true})};var m=document.documentElement.style;if("textOverflow"in m)q="textOverflow";else if("OTextOverflow"in m)q="OTextOverflow";if(typeof Modernizr!="undefined"&&Modernizr.canvastext)o=Modernizr.canvastext;else{m=document.createElement("canvas"); o=!!(m.getContext&&m.getContext("2d")&&typeof m.getContext("2d").fillText==="function")}a.fn.shorten._is_canvasTextSupported=o;a.fn.shorten._native=q;a.fn.shorten.defaults={tail:"…",tooltip:true}})(jQuery);
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