Melopia Rss Feed

如果大家看过这个博客，可能已经发现博客的各个标题都用了非标准字体。这种效果是使用 sIFR 3 脚本来实现的。其主要原理就是利用Flash文件可以内嵌自定义字体来自动将页面中的特定文字自动替代（大家在英文标题上右键看看。。。）。诚然对于西方语言来说，要内嵌字体是很容易实现的。对于英文来说就只有26个字母，即使包含大小写、粗体、斜体和粗斜体等变体，文件也不会太大（几个kB ~ 十几kB）。对于其它使用拼音文字的语言来说情况也类似，都能将下载Swf 文件控制在适于网络传输的范围内。然而对于方块字来说就不太现实了。无论怎样压缩，做出来的swf文件都是1MB以上。

由于我的Blog上既有外文条目，也有中文。那有没有什么方法可以让sIFR 3 不处理中文条目呢？开始我想通过设置Flash 里头的css变量font-family，将后备字体列上，希望flash能自动调用本机系统上头的字体。可惜flash 不买账。最后就逼着我改点东东了。

下面是两个判别标题是否含有中文的函数：

function fnFilterChinese( arrList) { //alert(arrList.length); var retList = []; for (var i=0;i<=arrList.length-1;i++) { var node = arrList[i]; if (fnCanShowChar(node.innerHTML)) { retList.push(node); } else { node.className += " <a href="http://raycui.com/wp/tag/sifr/" class="st_tag internal_tag" rel="tag" title="Posts tagged with sIFR">sIFR</a>-ReplaceFailed"; }; }; //alert(retList.length); return retList; }; function fnCanShowChar(str) { for (var i=0;i<=str.length-1;i++) { if (str.charCodeAt(i) > 0×261) { //alert(str.charCodeAt(i) + str.charAt(i)); return false; }; }; return true; };

基本原理就是穷举标题中的每个字符，并判断其ASCII码，要是大于一个数，那就基本判别是中文了（当然还有其他别的什么乱七八糟的字符）。其中第一个函数是用于截取筛选sIFR 3 核心函数 replace() 里头的节点的。

全部文件如下 sIFR 3：

/***************************************************************************** scalable Inman Flash Replacement (sIFR) version 3, revision 436. Copyright 2006 – 2008 Mark Wubben, <http://novemberborn.net/> Older versions: * IFR by Shaun Inman * sIFR 1.0 by Mike Davidson, Shaun Inman and Tomas Jogin * sIFR 2.0 by Mike Davidson, Shaun Inman, Tomas Jogin and Mark Wubben See also <http://novemberborn.net/sifr3> and <http://wiki.novemberborn.net/sifr3>. This software is licensed and provided under the CC-GNU LGPL. See <http://creativecommons.org/licenses/LGPL/2.1/> *****************************************************************************/ var sIFR=new function(){var O=this;var E={ACTIVE:”sIFR-active”,REPLACED:”sIFR-replaced”,IGNORE:”sIFR-ignore”,ALTERNATE:”sIFR-alternate”,CLASS:”sIFR-class”,LAYOUT:”sIFR-layout”,FLASH:”sIFR-flash”,FIX_FOCUS:”sIFR-fixfocus”,DUMMY:”sIFR-dummy”};E.IGNORE_CLASSES=[E.REPLACED,E.IGNORE,E.ALTERNATE];this.MIN_FONT_SIZE=6;this.MAX_FONT_SIZE=126;this.FLASH_PADDING_BOTTOM=5;this.VERSION=”436″;this.isActive=false;this.isEnabled=true;this.fixHover=true;this.autoInitialize=true;this.setPrefetchCookie=true;this.cookiePath=”/”;this.domains=[];this.forceWidth=true;this.fitExactly=false;this.forceTextTransform=true;this.useDomLoaded=true;this.useStyleCheck=false;this.hasFlashClassSet=false;this.repaintOnResize=true;this.replacements=[];var L=0;var R=false;function Y(){}function D(c){function d(e){return e.toLocaleUpperCase()}this.normalize=function(e){return e.replace(/\n|\r|\xA0/g,D.SINGLE_WHITESPACE).replace(/\s+/g,D.SINGLE_WHITESPACE)};this.textTransform=function(e,f){switch(e){case”uppercase”:return f.toLocaleUpperCase();case”lowercase”:return f.toLocaleLowerCase();case”capitalize”:return f.replace(/^\w|\s\w/g,d)}return f};this.toHexString=function(e){if(e.charAt(0)!=”#”||e.length!=4&&e.length!=7){return e}e=e.substring(1);return”0x”+(e.length==3?e.replace(/(.)(.)(.)/,”$1$1$2$2$3$3″):e)};this.toJson=function(g,f){var e=”";switch(typeof(g)){case”string”:e=’”‘+f(g)+’”‘;break;case”number”:case”boolean”:e=g.toString();break;case”object”:e=[];for(var h in g){if(g[h]==Object.prototype[h]){continue}e.push(‘”‘+h+’”:’+this.toJson(g[h]))}e=”{“+e.join(“,”)+”}”;break}return e};this.convertCssArg=function(e){if(!e){return{}}if(typeof(e)==”object”){if(e.constructor==Array){e=e.join(“”)}else{return e}}var l={};var m=e.split(“}”);for(var h=0;h<m.length;h++){var k=m[h].match(/([^\s{]+)\s*\{(.+)\s*;?\s*/);if(!k||k.length!=3){continue}if(!l[k[1]]){l[k[1]]={}}var g=k[2].split(";");for(var f=0;f<g.length;f++){var n=g[f].match(/\s*([^:\s]+)\s*\:\s*([^;]+)/);if(!n||n.length!=3){continue}l[k[1]][n[1]]=n[2].replace(/\s+$/,"")}}return l};this.extractFromCss=function(g,f,i,e){var h=null;if(g&&g[f]&&g[f][i]){h=g[f][i];if(e){delete g[f][i]}}return h};this.cssToString=function(f){var g=[];for(var e in f){var j=f[e];if(j==Object.prototype[e]){continue}g.push(e,"{");for(var i in j){if(j[i]==Object.prototype[i]){continue}var h=j[i];if(D.UNIT_REMOVAL_PROPERTIES[i]){h=parseInt(h,10)}g.push(i,":",h,";")}g.push("}")}return g.join("")};this.escape=function(e){return escape(e).replace(/\+/g,"%2B")};this.encodeVars=function(e){return e.join("&").replace(/%/g,"%25")};this.copyProperties=function(g,f){for(var e in g){if(f[e]===undefined){f[e]=g[e]}}return f};this.domain=function(){var f="";try{f=document.domain}catch(g){}return f};this.domainMatches=function(h,g){if(g=="*"||g==h){return true}var f=g.lastIndexOf("*");if(f>-1){g=g.substr(f+1);var e=h.lastIndexOf(g);if(e>-1&&(e+g.length)==h.length){return true}}return false};this.uriEncode=function(e){return encodeURI(decodeURIComponent(e))};this.delay=function(f,h,g){var e=Array.prototype.slice.call(arguments,3);setTimeout(function(){h.apply(g,e)},f)}}D.UNIT_REMOVAL_PROPERTIES={leading:true,”margin-left”:true,”margin-right”:true,”text-indent”:true};D.SINGLE_WHITESPACE=” “;function U(e){var d=this;function c(g,j,h){var k=d.getStyleAsInt(g,j,e.ua.ie);if(k==0){k=g[h];for(var f=3;f<arguments.length;f++){k-=d.getStyleAsInt(g,arguments[f],true)}}return k}this.getBody=function(){return document.getElementsByTagName("body")[0]||null};this.querySelectorAll=function(f){return window.parseSelector(f)};this.addClass=function(f,g){if(g){g.className=((g.className||"")==""?"":g.className+" ")+f}};this.removeClass=function(f,g){if(g){g.className=g.className.replace(new 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g=navigator.userAgent.toLowerCase();var q=(navigator.product||"").toLowerCase();var h=navigator.platform.toLowerCase();this.parseVersion=H.parseVersion;this.macintosh=/^mac/.test(h);this.windows=/^win/.test(h);this.linux=/^linux/.test(h);this.quicktime=false;this.opera=/opera/.test(g);this.konqueror=/konqueror/.test(g);this.ie=false/*@cc_on||true@*/;this.ieSupported=this.ie&&!/ppc|smartphone|iemobile|msie\s5\.5/.test(g)/*@cc_on&&@_jscript_version>=5.5@*/;this.ieWin=this.ie&&this.windows/*@cc_on&&@_jscript_version>=5.1@*/;this.windows=this.windows&&(!this.ie||this.ieWin);this.ieMac=this.ie&&this.macintosh/*@cc_on&&@_jscript_version<5.1@*/;this.macintosh=this.macintosh&&(!this.ie||this.ieMac);this.safari=/safari/.test(g);this.webkit=!this.konqueror&&/applewebkit/.test(g);this.khtml=this.webkit||this.konqueror;this.gecko=!this.khtml&&q=="gecko";this.ieVersion=this.ie&&/.*msie\s(\d\.\d)/.exec(g)?this.parseVersion(RegExp.$1):"0";this.operaVersion=this.opera&&/.*opera(\s|\/)(\d+\.\d+)/.exec(g)?this.parseVersion(RegExp.$2):"0";this.webkitVersion=this.webkit&&/.*applewebkit\/(\d+).*/.exec(g)?this.parseVersion(RegExp.$1):"0";this.geckoVersion=this.gecko&&/.*rv:\s*([^\)]+)\)\s+gecko/.exec(g)?this.parseVersion(RegExp.$1):"0";this.konquerorVersion=this.konqueror&&/.*konqueror\/([\d\.]+).*/.exec(g)?this.parseVersion(RegExp.$1):"0";this.flashVersion=0;if(this.ieWin){var l;var o=false;try{l=new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7")}catch(m){try{l=new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");this.flashVersion=this.parseVersion("6");l.AllowScriptAccess="always"}catch(m){o=this.flashVersion==this.parseVersion("6")}if(!o){try{l=new ActiveXObject("ShockwaveFlash.ShockwaveFlash")}catch(m){}}}if(!o&&l){this.flashVersion=this.parseVersion((l.GetVariable("$version")||"").replace(/^\D+(\d+)\D+(\d+)\D+(\d+).*/g,"$1.$2.$3"))}}else{if(navigator.plugins&&navigator.plugins["Shockwave Flash"]){var n=navigator.plugins["Shockwave Flash"].description.replace(/^.*\s+(\S+\s+\S+$)/,"$1");var p=n.replace(/^\D*(\d+\.\d+).*$/,"$1");if(/r/.test(n)){p+=n.replace(/^.*r(\d*).*$/,".$1")}else{if(/d/.test(n)){p+=".0"}}this.flashVersion=this.parseVersion(p);var j=false;for(var k=0,c=this.flashVersion>=H.MIN_FLASH_VERSION;c&&k<br /> <navigator.mimeTypes.length;k++){var 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<this.parseVersion("523");this.properDocument=typeof(document.location)=="object";this.supported=this.flash&&this.properDocument&&(!this.ie||this.ieSupported)&&this.computedStyleSupport&&(!this.opera||this.operaVersion>=this.parseVersion(“9.61″))&&(!this.webkit||this.webkitVersion>=this.parseVersion(“412″))&&(!this.gecko||this.geckoVersion>=this.parseVersion(“1.8.0.12″))&&(!this.konqueror)}H.parseVersion=function(c){return c.replace(/(^|\D)(\d+)(?=\D|$)/g,function(f,e,g){f=e;for(var d=4-g.length;d>=0;d–){f+=”0″}return f+g})};H.MIN_FLASH_VERSION=H.parseVersion(“8″);function F(c){this.fix=c.ua.ieWin&&window.location.hash!=”";var d;this.cache=function(){d=document.title};function e(){document.title=d}this.restore=function(){if(this.fix){setTimeout(e,0)}}}function S(l){var e=null;function c(){try{if(l.ua.ie||document.readyState!=”loaded”&&document.readyState!=”complete”){document.documentElement.doScroll(“left”)}}catch(n){return setTimeout(c,10)}i()}function i(){if(l.useStyleCheck){h()}else{if(!l.ua.mustCheckStyle){d(null,true)}}}function h(){e=l.dom.create(“div”,E.DUMMY);l.dom.getBody().appendChild(e);m()}function m(){if(l.dom.getComputedStyle(e,”marginLeft”)==”42px”){g()}else{setTimeout(m,10)}}function g(){if(e&&e.parentNode){e.parentNode.removeChild(e)}e=null;d(null,true)}function d(n,o){l.initialize(o);if(n&&n.type==”load”){if(document.removeEventListener){document.removeEventListener(“DOMContentLoaded”,d,false)}if(window.removeEventListener){window.removeEventListener(“load”,d,false)}}}function j(){l.prepareClearReferences();if(document.readyState==”interactive”){document.attachEvent(“onstop”,f);setTimeout(function(){document.detachEvent(“onstop”,f)},0)}}function f(){document.detachEvent(“onstop”,f);k()}function k(){l.clearReferences()}this.attach=function(){if(window.addEventListener){window.addEventListener(“load”,d,false)}else{window.attachEvent(“onload”,d)}if(!l.useDomLoaded||l.ua.forcePageLoad||l.ua.ie&&window.top!=window){return}if(l.ua.nativeDomLoaded){document.addEventListener(“DOMContentLoaded”,i,false)}else{if(l.ua.ie||l.ua.khtml){c()}}};this.attachUnload=function(){if(!l.ua.ie){return}window.attachEvent(“onbeforeunload”,j);window.attachEvent(“onunload”,k)}}var Q=”sifrFetch”;function N(c){var e=false;this.fetchMovies=function(f){if(c.setPrefetchCookie&&new RegExp(“;?”+Q+”=true;?”).test(document.cookie)){return}try{e=true;d(f)}catch(g){}if(c.setPrefetchCookie){document.cookie=Q+”=true;path=”+c.cookiePath}};this.clear=function(){if(!e){return}try{var f=document.getElementsByTagName(“script”);for(var g=f.length-1;g>=0;g–){var h=f[g];if(h.type==”sifr/prefetch”){h.parentNode.removeChild(h)}}}catch(j){}};function d(f){for(var g=0;g<f.length;g++){document.write('<script defer 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c&&c.parentNode},call:function(c){var d=this.getFlashElement();if(!d[c]){return false}return Function.prototype.apply.call(d[c],d,Array.prototype.slice.call(arguments,1))},attempt:function(){if(!this.available()){return false}try{this.call.apply(this,arguments)}catch(c){if(this.sIFR.debug){throw c}return false}return true},updateVars:function(c,e){for(var d=0;d <this.vars.length;d++){if(this.vars[d].split("=")[0]==c){this.vars[d]=c+"="+e;break}}var f=this.sIFR.util.encodeVars(this.vars);this.movie.injectVars(this.getFlashElement(),f);this.movie.injectVars(this.movie.html,f)},storeSize:function(c,d){this.movie.setSize(c,d);this.updateVars(c,d)},fireEvent:function(c){if(this.available()&&this.__events[c]){this.sIFR.util.delay(0,this.__events[c],this,this)}},resizeFlashElement:function(c,d,e){if(!this.available()){return}this.__resizing++;var f=this.getFlashElement();f.setAttribute("height",c);this.getAncestor().style.minHeight="";this.updateVars("renderheight",c);this.storeSize("height",c);if(d!==null){f.setAttribute("width",d);this.movie.setSize("width",d)}if(this.__events.onReplacement){this.sIFR.util.delay(0,this.__events.onReplacement,this,this);delete this.__events.onReplacement}if(e){this.sIFR.util.delay(0,function(){this.attempt("scaleMovie");this.__resizing--},this)}else{this.__resizing--}},blurFlashElement:function(){if(this.available()){this.sIFR.dom.blurElement(this.getFlashElement())}},resetMovie:function(){this.sIFR.util.delay(0,this.movie.reset,this.movie,this.getFlashElement(),this.getAlternate())},resizeAfterScale:function(){if(this.available()&&this.__resizing==0){this.sIFR.util.delay(0,this.resize,this)}},resize:function(){if(!this.available()){return}this.__resizing++;var g=this.getFlashElement();var f=g.offsetWidth;if(f==0){return}var e=g.getAttribute("width");var l=g.getAttribute("height");var 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K=/[\s#.:>+~()@]|[^\s#.:>+~()@]+/g;function H(R,P){P=P||document.documentElement;var S=R.split(B),X=[];for(var U=0;U<S.length;U++){var N=[P],W=G(S[U]);for(var T=0;T<W.length;){var Q=W[T++],O=W[T++],V="";if(W[T]=="("){while(W[T++]!=")"&&T<W.length){V+=W[T]}V=V.slice(0,-1)}N=I(N,Q,O,V)}X=X.concat(N)}return X}function G(N){var O=N.replace(A,"$1").replace(L,"$1*$2").replace(F,D);return O.match(K)||[]}function D(N){return N.replace(M,"$1 ")}function I(N,P,Q,O){return(H.selectors[P])?H.selectors[P](N,Q,O):[]}var E={toArray:function(O){var N=[];for(var P=0;P<O.length;P++){N.push(O[P])}return N}};var C={isTag:function(O,N){return(N=="*")||(N.toLowerCase()==O.nodeName.toLowerCase())},previousSiblingElement:function(N){do{N=N.previousSibling}while(N&&N.nodeType!=1);return N},nextSiblingElement:function(N){do{N=N.nextSibling}while(N&&N.nodeType!=1);return N},hasClass:function(N,O){return(O.className||"").match("(^|\\s)"+N+"(\\s|$)")},getByTag:function(N,O){return O.getElementsByTagName(N)}};var J={"#":function(N,P){for(var O=0;O<N.length;O++){if(N[O].getAttribute("id")==P){return[N[O]]}}return[]}," ":function(O,Q){var N=[];for(var P=0;P<O.length;P++){N=N.concat(E.toArray(C.getByTag(Q,O[P])))}return N},">“:function(O,R){var N=[];for(var Q=0,S;Q<O.length;Q++){S=O[Q];for(var P=0,T;P<S.childNodes.length;P++){T=S.childNodes[P];if(T.nodeType==1&&C.isTag(T,R)){N.push(T)}}}return N},".":function(O,Q){var N=[];for(var P=0,R;P<O.length;P++){R=O[P];if(C.hasClass([Q],R)){N.push(R)}}return N},":":function(N,P,O){return(H.pseudoClasses[P])?H.pseudoClasses[P](N,O):[]}};H.selectors=J;H.pseudoClasses={};H.util=E;H.dom=C;return H})(); function fnFilterChinese( arrList) { //alert(arrList.length); var retList = []; for (var i=0;i<=arrList.length-1;i++) { var node = arrList[i]; if (fnCanShowChar(node.innerHTML)) { retList.push(node); } else { node.className += " sIFR-ReplaceFailed"; }; }; //alert(retList.length); return retList; }; function fnCanShowChar(str) { for (var i=0;i<=str.length-1;i++) { 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Technorati Tags: Chinese, css, javascript, sIFR, Web

This entry was posted on Saturday, December 20th, 2008 at 10:11 pm and is filed under Web Design. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.