mirror of
https://git.tt-rss.org/git/tt-rss.git
synced 2025-12-14 08:05:56 +00:00
build custom layer of Dojo to speed up loading of tt-rss (refs #293)
This commit is contained in:
Andrew Dolgov
648
lib/dojo/back.js
648
lib/dojo/back.js
@@ -5,254 +5,406 @@
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*/
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if(!dojo._hasResource["dojo.back"]){
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dojo._hasResource["dojo.back"]=true;
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if(!dojo._hasResource["dojo.back"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
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dojo._hasResource["dojo.back"] = true;
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dojo.provide("dojo.back");
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(function(){
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var _1=dojo.back;
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function _2(){
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var h=window.location.hash;
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if(h.charAt(0)=="#"){
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h=h.substring(1);
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/*=====
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dojo.back = {
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// summary: Browser history management resources
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}
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return dojo.isMozilla?h:decodeURIComponent(h);
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};
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function _3(h){
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if(!h){
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h="";
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}
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window.location.hash=encodeURIComponent(h);
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_4=history.length;
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};
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if(dojo.exists("tests.back-hash")){
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_1.getHash=_2;
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_1.setHash=_3;
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}
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var _5=(typeof (window)!=="undefined")?window.location.href:"";
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var _6=(typeof (window)!=="undefined")?_2():"";
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var _7=null;
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var _8=null;
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var _9=null;
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var _a=null;
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var _b=[];
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var _c=[];
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var _d=false;
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var _e=false;
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var _4;
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function _f(){
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var _10=_c.pop();
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if(!_10){
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return;
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}
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var _11=_c[_c.length-1];
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if(!_11&&_c.length==0){
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_11=_7;
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}
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if(_11){
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if(_11.kwArgs["back"]){
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_11.kwArgs["back"]();
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}else{
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if(_11.kwArgs["backButton"]){
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_11.kwArgs["backButton"]();
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}else{
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if(_11.kwArgs["handle"]){
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_11.kwArgs.handle("back");
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}
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}
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}
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}
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_b.push(_10);
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};
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_1.goBack=_f;
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function _12(){
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var _13=_b.pop();
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if(!_13){
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return;
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}
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if(_13.kwArgs["forward"]){
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_13.kwArgs.forward();
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}else{
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if(_13.kwArgs["forwardButton"]){
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_13.kwArgs.forwardButton();
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}else{
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if(_13.kwArgs["handle"]){
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_13.kwArgs.handle("forward");
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}
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}
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}
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_c.push(_13);
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};
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_1.goForward=_12;
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function _14(url,_15,_16){
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return {"url":url,"kwArgs":_15,"urlHash":_16};
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};
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function _17(url){
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var _18=url.split("?");
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if(_18.length<2){
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return null;
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}else{
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return _18[1];
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}
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};
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function _19(){
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var url=(dojo.config["dojoIframeHistoryUrl"]||dojo.moduleUrl("dojo","resources/iframe_history.html"))+"?"+(new Date()).getTime();
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_d=true;
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if(_a){
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dojo.isWebKit?_a.location=url:window.frames[_a.name].location=url;
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}else{
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}
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return url;
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};
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function _1a(){
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if(!_e){
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var hsl=_c.length;
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var _1b=_2();
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if((_1b===_6||window.location.href==_5)&&(hsl==1)){
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_f();
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return;
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}
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if(_b.length>0){
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if(_b[_b.length-1].urlHash===_1b){
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_12();
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return;
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}
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}
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if((hsl>=2)&&(_c[hsl-2])){
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if(_c[hsl-2].urlHash===_1b){
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_f();
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return;
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}
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}
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if(dojo.isSafari&&dojo.isSafari<3){
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var _1c=history.length;
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if(_1c>_4){
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_12();
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}else{
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if(_1c<_4){
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_f();
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}
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}
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_4=_1c;
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}
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}
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};
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_1.init=function(){
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if(dojo.byId("dj_history")){
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return;
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}
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var src=dojo.config["dojoIframeHistoryUrl"]||dojo.moduleUrl("dojo","resources/iframe_history.html");
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if(dojo._postLoad){
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console.error("dojo.back.init() must be called before the DOM has loaded. "+"If using xdomain loading or djConfig.debugAtAllCosts, include dojo.back "+"in a build layer.");
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}else{
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document.write("<iframe style=\"border:0;width:1px;height:1px;position:absolute;visibility:hidden;bottom:0;right:0;\" name=\"dj_history\" id=\"dj_history\" src=\""+src+"\"></iframe>");
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}
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};
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_1.setInitialState=function(_1d){
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_7=_14(_5,_1d,_6);
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};
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_1.addToHistory=function(_1e){
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_b=[];
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var _1f=null;
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var url=null;
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if(!_a){
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if(dojo.config["useXDomain"]&&!dojo.config["dojoIframeHistoryUrl"]){
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console.warn("dojo.back: When using cross-domain Dojo builds,"+" please save iframe_history.html to your domain and set djConfig.dojoIframeHistoryUrl"+" to the path on your domain to iframe_history.html");
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}
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_a=window.frames["dj_history"];
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}
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if(!_9){
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_9=dojo.create("a",{style:{display:"none"}},dojo.body());
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}
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if(_1e["changeUrl"]){
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_1f=""+((_1e["changeUrl"]!==true)?_1e["changeUrl"]:(new Date()).getTime());
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if(_c.length==0&&_7.urlHash==_1f){
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_7=_14(url,_1e,_1f);
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return;
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}else{
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if(_c.length>0&&_c[_c.length-1].urlHash==_1f){
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_c[_c.length-1]=_14(url,_1e,_1f);
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return;
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}
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}
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_e=true;
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setTimeout(function(){
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_3(_1f);
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_e=false;
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},1);
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_9.href=_1f;
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if(dojo.isIE){
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url=_19();
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var _20=_1e["back"]||_1e["backButton"]||_1e["handle"];
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var tcb=function(_21){
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if(_2()!=""){
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setTimeout(function(){
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_3(_1f);
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},1);
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}
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_20.apply(this,[_21]);
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};
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if(_1e["back"]){
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_1e.back=tcb;
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}else{
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if(_1e["backButton"]){
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_1e.backButton=tcb;
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}else{
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if(_1e["handle"]){
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_1e.handle=tcb;
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}
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}
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}
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var _22=_1e["forward"]||_1e["forwardButton"]||_1e["handle"];
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var tfw=function(_23){
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if(_2()!=""){
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_3(_1f);
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}
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if(_22){
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_22.apply(this,[_23]);
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}
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};
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if(_1e["forward"]){
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_1e.forward=tfw;
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}else{
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if(_1e["forwardButton"]){
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_1e.forwardButton=tfw;
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}else{
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if(_1e["handle"]){
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_1e.handle=tfw;
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}
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}
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}
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}else{
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if(!dojo.isIE){
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if(!_8){
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_8=setInterval(_1a,200);
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}
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}
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}
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}else{
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url=_19();
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}
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_c.push(_14(url,_1e,_1f));
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};
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_1._iframeLoaded=function(evt,_24){
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var _25=_17(_24.href);
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if(_25==null){
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if(_c.length==1){
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_f();
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}
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return;
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}
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if(_d){
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_d=false;
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return;
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}
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if(_c.length>=2&&_25==_17(_c[_c.length-2].url)){
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_f();
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}else{
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if(_b.length>0&&_25==_17(_b[_b.length-1].url)){
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_12();
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}
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}
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};
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})();
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=====*/
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(function(){
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var back = dojo.back;
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// everyone deals with encoding the hash slightly differently
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function getHash(){
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var h = window.location.hash;
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if(h.charAt(0) == "#"){ h = h.substring(1); }
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return dojo.isMozilla ? h : decodeURIComponent(h);
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}
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function setHash(h){
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if(!h){ h = ""; }
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window.location.hash = encodeURIComponent(h);
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historyCounter = history.length;
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}
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// if we're in the test for these methods, expose them on dojo.back. ok'd with alex.
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if(dojo.exists("tests.back-hash")){
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back.getHash = getHash;
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back.setHash = setHash;
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}
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var initialHref = (typeof(window) !== "undefined") ? window.location.href : "";
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var initialHash = (typeof(window) !== "undefined") ? getHash() : "";
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var initialState = null;
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var locationTimer = null;
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var bookmarkAnchor = null;
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var historyIframe = null;
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var forwardStack = [];
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var historyStack = [];
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var moveForward = false;
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var changingUrl = false;
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var historyCounter;
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function handleBackButton(){
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//summary: private method. Do not call this directly.
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//The "current" page is always at the top of the history stack.
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var current = historyStack.pop();
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if(!current){ return; }
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var last = historyStack[historyStack.length-1];
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if(!last && historyStack.length == 0){
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last = initialState;
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}
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if(last){
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if(last.kwArgs["back"]){
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last.kwArgs["back"]();
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}else if(last.kwArgs["backButton"]){
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last.kwArgs["backButton"]();
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}else if(last.kwArgs["handle"]){
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last.kwArgs.handle("back");
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}
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}
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forwardStack.push(current);
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}
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back.goBack = handleBackButton;
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function handleForwardButton(){
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//summary: private method. Do not call this directly.
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var last = forwardStack.pop();
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if(!last){ return; }
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if(last.kwArgs["forward"]){
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last.kwArgs.forward();
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}else if(last.kwArgs["forwardButton"]){
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last.kwArgs.forwardButton();
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}else if(last.kwArgs["handle"]){
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last.kwArgs.handle("forward");
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}
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historyStack.push(last);
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}
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back.goForward = handleForwardButton;
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function createState(url, args, hash){
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//summary: private method. Do not call this directly.
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return {"url": url, "kwArgs": args, "urlHash": hash}; //Object
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}
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function getUrlQuery(url){
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//summary: private method. Do not call this directly.
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var segments = url.split("?");
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if(segments.length < 2){
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return null; //null
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}
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else{
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return segments[1]; //String
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}
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}
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function loadIframeHistory(){
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//summary: private method. Do not call this directly.
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var url = (dojo.config["dojoIframeHistoryUrl"] || dojo.moduleUrl("dojo", "resources/iframe_history.html")) + "?" + (new Date()).getTime();
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moveForward = true;
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if(historyIframe){
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dojo.isWebKit ? historyIframe.location = url : window.frames[historyIframe.name].location = url;
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}else{
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//console.warn("dojo.back: Not initialised. You need to call dojo.back.init() from a <script> block that lives inside the <body> tag.");
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}
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return url; //String
|
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}
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function checkLocation(){
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if(!changingUrl){
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var hsl = historyStack.length;
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var hash = getHash();
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if((hash === initialHash||window.location.href == initialHref)&&(hsl == 1)){
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// FIXME: could this ever be a forward button?
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// we can't clear it because we still need to check for forwards. Ugg.
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// clearInterval(this.locationTimer);
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handleBackButton();
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return;
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}
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// first check to see if we could have gone forward. We always halt on
|
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// a no-hash item.
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if(forwardStack.length > 0){
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if(forwardStack[forwardStack.length-1].urlHash === hash){
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handleForwardButton();
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return;
|
||||
}
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}
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// ok, that didn't work, try someplace back in the history stack
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if((hsl >= 2)&&(historyStack[hsl-2])){
|
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if(historyStack[hsl-2].urlHash === hash){
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handleBackButton();
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return;
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}
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}
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if(dojo.isSafari && dojo.isSafari < 3){
|
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var hisLen = history.length;
|
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if(hisLen > historyCounter) handleForwardButton();
|
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else if(hisLen < historyCounter) handleBackButton();
|
||||
historyCounter = hisLen;
|
||||
}
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}
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};
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back.init = function(){
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//summary: Initializes the undo stack. This must be called from a <script>
|
||||
// block that lives inside the <body> tag to prevent bugs on IE.
|
||||
// description:
|
||||
// Only call this method before the page's DOM is finished loading. Otherwise
|
||||
// it will not work. Be careful with xdomain loading or djConfig.debugAtAllCosts scenarios,
|
||||
// in order for this method to work, dojo.back will need to be part of a build layer.
|
||||
if(dojo.byId("dj_history")){ return; } // prevent reinit
|
||||
var src = dojo.config["dojoIframeHistoryUrl"] || dojo.moduleUrl("dojo", "resources/iframe_history.html");
|
||||
if (dojo._postLoad) {
|
||||
console.error("dojo.back.init() must be called before the DOM has loaded. "
|
||||
+ "If using xdomain loading or djConfig.debugAtAllCosts, include dojo.back "
|
||||
+ "in a build layer.");
|
||||
} else {
|
||||
document.write('<iframe style="border:0;width:1px;height:1px;position:absolute;visibility:hidden;bottom:0;right:0;" name="dj_history" id="dj_history" src="' + src + '"></iframe>');
|
||||
}
|
||||
};
|
||||
|
||||
back.setInitialState = function(/*Object*/args){
|
||||
//summary:
|
||||
// Sets the state object and back callback for the very first page
|
||||
// that is loaded.
|
||||
//description:
|
||||
// It is recommended that you call this method as part of an event
|
||||
// listener that is registered via dojo.addOnLoad().
|
||||
//args: Object
|
||||
// See the addToHistory() function for the list of valid args properties.
|
||||
initialState = createState(initialHref, args, initialHash);
|
||||
};
|
||||
|
||||
//FIXME: Make these doc comments not be awful. At least they're not wrong.
|
||||
//FIXME: Would like to support arbitrary back/forward jumps. Have to rework iframeLoaded among other things.
|
||||
//FIXME: is there a slight race condition in moz using change URL with the timer check and when
|
||||
// the hash gets set? I think I have seen a back/forward call in quick succession, but not consistent.
|
||||
|
||||
|
||||
/*=====
|
||||
dojo.__backArgs = function(kwArgs){
|
||||
// back: Function?
|
||||
// A function to be called when this state is reached via the user
|
||||
// clicking the back button.
|
||||
// forward: Function?
|
||||
// Upon return to this state from the "back, forward" combination
|
||||
// of navigation steps, this function will be called. Somewhat
|
||||
// analgous to the semantic of an "onRedo" event handler.
|
||||
// changeUrl: Boolean?|String?
|
||||
// Boolean indicating whether or not to create a unique hash for
|
||||
// this state. If a string is passed instead, it is used as the
|
||||
// hash.
|
||||
}
|
||||
=====*/
|
||||
|
||||
back.addToHistory = function(/*dojo.__backArgs*/ args){
|
||||
// summary:
|
||||
// adds a state object (args) to the history list.
|
||||
// description:
|
||||
// To support getting back button notifications, the object
|
||||
// argument should implement a function called either "back",
|
||||
// "backButton", or "handle". The string "back" will be passed as
|
||||
// the first and only argument to this callback.
|
||||
//
|
||||
// To support getting forward button notifications, the object
|
||||
// argument should implement a function called either "forward",
|
||||
// "forwardButton", or "handle". The string "forward" will be
|
||||
// passed as the first and only argument to this callback.
|
||||
//
|
||||
// If you want the browser location string to change, define "changeUrl" on the object. If the
|
||||
// value of "changeUrl" is true, then a unique number will be appended to the URL as a fragment
|
||||
// identifier (http://some.domain.com/path#uniquenumber). If it is any other value that does
|
||||
// not evaluate to false, that value will be used as the fragment identifier. For example,
|
||||
// if changeUrl: 'page1', then the URL will look like: http://some.domain.com/path#page1
|
||||
//
|
||||
// There are problems with using dojo.back with semantically-named fragment identifiers
|
||||
// ("hash values" on an URL). In most browsers it will be hard for dojo.back to know
|
||||
// distinguish a back from a forward event in those cases. For back/forward support to
|
||||
// work best, the fragment ID should always be a unique value (something using new Date().getTime()
|
||||
// for example). If you want to detect hash changes using semantic fragment IDs, then
|
||||
// consider using dojo.hash instead (in Dojo 1.4+).
|
||||
//
|
||||
// example:
|
||||
// | dojo.back.addToHistory({
|
||||
// | back: function(){ console.log('back pressed'); },
|
||||
// | forward: function(){ console.log('forward pressed'); },
|
||||
// | changeUrl: true
|
||||
// | });
|
||||
|
||||
// BROWSER NOTES:
|
||||
// Safari 1.2:
|
||||
// back button "works" fine, however it's not possible to actually
|
||||
// DETECT that you've moved backwards by inspecting window.location.
|
||||
// Unless there is some other means of locating.
|
||||
// FIXME: perhaps we can poll on history.length?
|
||||
// Safari 2.0.3+ (and probably 1.3.2+):
|
||||
// works fine, except when changeUrl is used. When changeUrl is used,
|
||||
// Safari jumps all the way back to whatever page was shown before
|
||||
// the page that uses dojo.undo.browser support.
|
||||
// IE 5.5 SP2:
|
||||
// back button behavior is macro. It does not move back to the
|
||||
// previous hash value, but to the last full page load. This suggests
|
||||
// that the iframe is the correct way to capture the back button in
|
||||
// these cases.
|
||||
// Don't test this page using local disk for MSIE. MSIE will not create
|
||||
// a history list for iframe_history.html if served from a file: URL.
|
||||
// The XML served back from the XHR tests will also not be properly
|
||||
// created if served from local disk. Serve the test pages from a web
|
||||
// server to test in that browser.
|
||||
// IE 6.0:
|
||||
// same behavior as IE 5.5 SP2
|
||||
// Firefox 1.0+:
|
||||
// the back button will return us to the previous hash on the same
|
||||
// page, thereby not requiring an iframe hack, although we do then
|
||||
// need to run a timer to detect inter-page movement.
|
||||
|
||||
//If addToHistory is called, then that means we prune the
|
||||
//forward stack -- the user went back, then wanted to
|
||||
//start a new forward path.
|
||||
forwardStack = [];
|
||||
|
||||
var hash = null;
|
||||
var url = null;
|
||||
if(!historyIframe){
|
||||
if(dojo.config["useXDomain"] && !dojo.config["dojoIframeHistoryUrl"]){
|
||||
console.warn("dojo.back: When using cross-domain Dojo builds,"
|
||||
+ " please save iframe_history.html to your domain and set djConfig.dojoIframeHistoryUrl"
|
||||
+ " to the path on your domain to iframe_history.html");
|
||||
}
|
||||
historyIframe = window.frames["dj_history"];
|
||||
}
|
||||
if(!bookmarkAnchor){
|
||||
bookmarkAnchor = dojo.create("a", {style: {display: "none"}}, dojo.body());
|
||||
}
|
||||
if(args["changeUrl"]){
|
||||
hash = ""+ ((args["changeUrl"]!==true) ? args["changeUrl"] : (new Date()).getTime());
|
||||
|
||||
//If the current hash matches the new one, just replace the history object with
|
||||
//this new one. It doesn't make sense to track different state objects for the same
|
||||
//logical URL. This matches the browser behavior of only putting in one history
|
||||
//item no matter how many times you click on the same #hash link, at least in Firefox
|
||||
//and Safari, and there is no reliable way in those browsers to know if a #hash link
|
||||
//has been clicked on multiple times. So making this the standard behavior in all browsers
|
||||
//so that dojo.back's behavior is the same in all browsers.
|
||||
if(historyStack.length == 0 && initialState.urlHash == hash){
|
||||
initialState = createState(url, args, hash);
|
||||
return;
|
||||
}else if(historyStack.length > 0 && historyStack[historyStack.length - 1].urlHash == hash){
|
||||
historyStack[historyStack.length - 1] = createState(url, args, hash);
|
||||
return;
|
||||
}
|
||||
|
||||
changingUrl = true;
|
||||
setTimeout(function() {
|
||||
setHash(hash);
|
||||
changingUrl = false;
|
||||
}, 1);
|
||||
bookmarkAnchor.href = hash;
|
||||
|
||||
if(dojo.isIE){
|
||||
url = loadIframeHistory();
|
||||
|
||||
var oldCB = args["back"]||args["backButton"]||args["handle"];
|
||||
|
||||
//The function takes handleName as a parameter, in case the
|
||||
//callback we are overriding was "handle". In that case,
|
||||
//we will need to pass the handle name to handle.
|
||||
var tcb = function(handleName){
|
||||
if(getHash() != ""){
|
||||
setTimeout(function() { setHash(hash); }, 1);
|
||||
}
|
||||
//Use apply to set "this" to args, and to try to avoid memory leaks.
|
||||
oldCB.apply(this, [handleName]);
|
||||
};
|
||||
|
||||
//Set interceptor function in the right place.
|
||||
if(args["back"]){
|
||||
args.back = tcb;
|
||||
}else if(args["backButton"]){
|
||||
args.backButton = tcb;
|
||||
}else if(args["handle"]){
|
||||
args.handle = tcb;
|
||||
}
|
||||
|
||||
var oldFW = args["forward"]||args["forwardButton"]||args["handle"];
|
||||
|
||||
//The function takes handleName as a parameter, in case the
|
||||
//callback we are overriding was "handle". In that case,
|
||||
//we will need to pass the handle name to handle.
|
||||
var tfw = function(handleName){
|
||||
if(getHash() != ""){
|
||||
setHash(hash);
|
||||
}
|
||||
if(oldFW){ // we might not actually have one
|
||||
//Use apply to set "this" to args, and to try to avoid memory leaks.
|
||||
oldFW.apply(this, [handleName]);
|
||||
}
|
||||
};
|
||||
|
||||
//Set interceptor function in the right place.
|
||||
if(args["forward"]){
|
||||
args.forward = tfw;
|
||||
}else if(args["forwardButton"]){
|
||||
args.forwardButton = tfw;
|
||||
}else if(args["handle"]){
|
||||
args.handle = tfw;
|
||||
}
|
||||
|
||||
}else if(!dojo.isIE){
|
||||
// start the timer
|
||||
if(!locationTimer){
|
||||
locationTimer = setInterval(checkLocation, 200);
|
||||
}
|
||||
|
||||
}
|
||||
}else{
|
||||
url = loadIframeHistory();
|
||||
}
|
||||
|
||||
historyStack.push(createState(url, args, hash));
|
||||
};
|
||||
|
||||
back._iframeLoaded = function(evt, ifrLoc){
|
||||
//summary:
|
||||
// private method. Do not call this directly.
|
||||
var query = getUrlQuery(ifrLoc.href);
|
||||
if(query == null){
|
||||
// alert("iframeLoaded");
|
||||
// we hit the end of the history, so we should go back
|
||||
if(historyStack.length == 1){
|
||||
handleBackButton();
|
||||
}
|
||||
return;
|
||||
}
|
||||
if(moveForward){
|
||||
// we were expecting it, so it's not either a forward or backward movement
|
||||
moveForward = false;
|
||||
return;
|
||||
}
|
||||
|
||||
//Check the back stack first, since it is more likely.
|
||||
//Note that only one step back or forward is supported.
|
||||
if(historyStack.length >= 2 && query == getUrlQuery(historyStack[historyStack.length-2].url)){
|
||||
handleBackButton();
|
||||
}else if(forwardStack.length > 0 && query == getUrlQuery(forwardStack[forwardStack.length-1].url)){
|
||||
handleForwardButton();
|
||||
}
|
||||
};
|
||||
})();
|
||||
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user