iichan catalog

Add catalog featureto http://iichan.hk/;
当前为 2015-07-24 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         iichan catalog
// @namespace    http://your.homepage/
// @version      0.1
// @description  Add catalog featureto http://iichan.hk/;
// @author       You
// @match        http://iichan.hk/*
// @grant        none
// @run-at document-idle
// ==/UserScript==
/*jshint multistr: true */
var formElt = null;
var catalogElt = null;
var catalogFlag = false;

var scrollBuffer = 600;
var timeToFailure = 1500;
var noNextPage = false;
var activeDoc;
var pending;

init();

function init(){
    scrollBuffer += window.innerHeight;
    pending = false; 
    activeDoc = document;    

    if(!isMainFrame()){
        return;
    }
    var adminbar = qs('.adminbar')[0];
    if(!adminbar){
        return;
    }
    //console.log(adminbar);

    makeCatalogLink(adminbar);
    formElt = getFormFromDoc(document);
    makeCatalogElement();
    
    var firstPage = getFirstPage(getPagePane(document));     
    buildCatalog(getFormFromDoc(activeDoc));
    
    handleXHRDoc(firstPage, nextDoc);

    window.addEventListener("scroll", testScrollPosition, false);
    //testScrollPosition();
}

function nextDoc(doc){
    activeDoc = doc;
}

function appendNextPage(href){
    if(!href){
        return;
    }
    function addNextPage(doc){
        buildCatalog(getFormFromDoc(doc));
        nextDoc(doc);
    }

    handleXHRDoc(href, addNextPage);    
}

function testScrollPosition(){

    if( noNextPage ){
        return;
        //testScrollPosition = function(){};
    }

    if(isCatalogMode()){
        //Take the max of the two heights for browser compatibility
        if( !pending && window.pageYOffset + scrollBuffer > Math.max( document.documentElement.scrollHeight, document.documentElement.offsetHeight ) )
        {	
            pending = true;
            timeout = setTimeout( function(){pending=false;testScrollPosition();}, timeToFailure );
            console.log('test position');
            console.log(getNextPage());
            var nextPage = getNextPage();
            if(!!nextPage){
                appendNextPage(nextPage);
            }
            else{
                noNextPage = true;
            }
            //handleXHRDoc(firstPage, appendNextPage);
        }
    }  
}

function showCatalog(){
    catalogFlag = true;
     console.log(catalogElt);
    formElt.innerHTML ='';
    formElt.appendChild(catalogElt);
}

function makeCatalogLink(adminbar){
    var catalogLink = document.createElement('span');
    catalogLink.innerHTML =  '[<a href="#" id="id_catalog">Каталог</a>]';
    //console.log(catalogLink);
    adminbar.appendChild(catalogLink);
    catalogLink.onclick = function(e){
        //console.log(document.querySelector('form#delform'));
        showCatalog();
        e.preventDefault();
    };
}

function getThreadsList(form){
    //    var form = document.querySelector('form#delform');
    var tempList = form.querySelectorAll('div');
    var threadList = [];
    for(var i =0; i<tempList.length;++i){
        if(tempList[i].querySelector('.reflink')){
            threadList.push(tempList[i]);
        }
    }
    return threadList;


}

function makeCatalogElement(){        
    catalogElt = document.createElement('div');
    var style = '<style>\
.thread_wrap{text-align:center; display:inline-block; overflow: hidden; height: 400px; position:relative; vertical-align: top; margin:5px; }\
.thread_wrap:hover{overflow: visible; z-index: 900;}\
</style>';
catalogElt.innerHTML = style;
}


function getCatalogElement(){    
    if(!catalogElt){
        throw new Error('Catalog element is null');
    }
    return catalogElt;
}

function buildCatalog(form){

    var catalogElement = getCatalogElement();
    var threadList = getThreadsList(form);
    var i;
    var post = null;
    for(i =0; i< threadList.length;++i){
        post = buildCatalogPost(threadList[i]);
        catalogElement.appendChild(post);
    }
    console.log(catalogElement);
    return catalogElement;

}

function getFormFromDoc(doc){
    var form =  doc.querySelectorAll('form#delform')[0];
    if(!form){
        throw new Error('Form element not found');
    }
    return form;
    
}

function getForm(){
    return formElt;
}

function buildCatalogPost(thread){
    var threadLink = thread.querySelector('.reflink a');   
    threadLink = threadLink.getAttribute('href');

    var imgSrc = thread.querySelector('a img');
    imgSrc = imgSrc.getAttribute('src');

    var threadName = thread.querySelector('.filetitle');
    threadName = threadName.textContent;
    var threadText = thread.querySelector('blockquote');
    threadText = threadText.innerHTML;
    var backgroundColor = '#F0E0D6';
    /*    var template = '<div style="width:220px; height: 400px; border:1px solid black; margin:5px; padding:5px; text-align:center;\
        display:inline-block;word-wrap: break-word; overflow: hidden;">\
<a href="'+ threadLink+ '"><img src="' + imgSrc+'" class="thumb"  style=" display: block; margin: 0 auto; float:none;"></a>\
<span class="filetitle" style=" display:inline-block">'+threadName+'</span>\
<blockquote>' + threadText + '</blockquote></div>';*/

    var template = '<div class = "thread_wrap"><div style="width:220px; min-height:400px; border:1px solid black; overflow:hidden;\
-webkit-box-sizing: border-box;  -moz-box-sizing: border-box;  box-sizing: border-box;\
padding:5px; text-align:center; display:inline-block;word-wrap: break-word; background:'+backgroundColor+';">\
<a href="'+ threadLink+ '"><img src="' + imgSrc+'" class="thumb"  style=" display: block; margin: 0 auto; float:none;"></a>\
<span class="filetitle" style=" display:inline-block">'+threadName+'</span>\
<span>' + threadText + '</span></div></div>';

    //console.log(template);
    var post = document.createElement('div');
    post.innerHTML = template; 
    post = post.firstChild;
    return post; 
}


//console.log(document.querySelectorAll('form#postform'));

function isMainFrame(){
    if(qs('form#delform').length){
        console.log('iichan main frame');
        return true;
    }

    return false;
}

function getNextPage(pagePane){
    pagePane = getPagePane();
    var pageList = pagePane.querySelectorAll('td')[2];
    var next = pageList.querySelectorAll('td form')[0];

    if(!next){
        return false;
    }
    href = next.getAttribute('action');   
    console.log(href);

    return href;
}


function getFirstPage(pagePane){
    var pageList = pagePane.querySelectorAll('td')[1];

    var first = pageList.querySelectorAll('a')[0];

    href = first.getAttribute('href');   
    console.log(href);

    return href;
}

function getPagePane(doc){
    doc = activeDoc;
    var paginator = doc.querySelector('body>table>tbody>tr');
    //console.log(pagePane);
    return paginator;
}

function isCatalogMode(){
    return catalogFlag;
}

function handleXHRDoc(reqString, callback){
    var doc = document.implementation.createHTMLDocument("example");

    var xmlhttp = new XMLHttpRequest();
    xmlhttp.open('GET', reqString, true);
    xmlhttp.send(null);
    xmlhttp.onreadystatechange = handle;

    function handle(){              
        if (xmlhttp.readyState == 4) {
            if(xmlhttp.status == 200) {
                doc.documentElement.innerHTML = xmlhttp.responseText;
                //console.log(doc);
                callback(doc);
            }			
            else{
                console.log('Error xhr of ' + reqString);
            }
        }
	}    
}


function qs(selector){
    return document.querySelectorAll(selector);
}