如何转换这个Greasemonkey的code为JavaScript为Android？ [英] How to Convert this Greasemonkey code to JavaScript for Android?

问题描述

我试图加载一个页面，然后在其上运行一个javascript code，我发现了一个Greasemonkey的脚本不相同，但我实施的android一样的东西有问题，可能是因为我不了解JavaScript的东西。

这是Greasemonkey的脚本;它应该给予一个新的链接：

  window.addEventListener（负荷，（）的函数
{
    VAR链接= document.evaluate(\"//div[@class='dl_startlink']/div/a[contains(@href,'\"+window.location.href.match(/\\?(.*)$/)[1]+\"')]\",文档，空，了XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE，NULL）;
    如果（！link.snapshotLength）
        返回;
    location.href = link.snapshotItem（0）.href;}，FALSE）;
 

结果
这是我要如何运行：

 公共无效onPageFinished（的WebView视图，字符串URL）{
                的System.out.println（装的WebView）;
                webView.loadUrl（JavaScript的：/ * ...........的Javascript code这里........ * /）;           }
 

我如何得到该链接，并在web视图加载页面任何想法？
编辑：另一个版本做同样的事情。

  VAR候选人=关于document.evaluate（// * [@类='dl_startlink'] /格，文档，空，了XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE，NULL）;
 如果（！candidates.snapshotLength）
返回;
//最高zIndex的股利有*真正的*链接;其余的是无用的。
 - 变种maxDiv = candidates.snapshotItem（0）;
 - 为（VAR I = 1; I＆LT; candidates.snapshotLength;我++）
 - 如果（maxDiv.style.zIndex＆LT; candidates.snapshotItem（我）.style.zIndex）
 -  maxDiv = candidates.snapshotItem（ⅰ）;
 -  location.href = maxDiv.children [0] .href;
 

解决方案

好吧，这里只是简单的XPath查询，这可能会被改写为CSS选择器。

此外，我决定更换 window.location.href.match（/ \\？（。*）$ /）[1] 。如果我的版本将无法正常工作，取代前两行用 VAR的查询= window.location.href.match（/ \\（*）$ /？）[1];

事实上，甚至 VAR的查询= window.location.search.replace（/ ^ \\？/，''）就足够了。

  window.addEventListener（负荷，（）的函数
{
    变种L = window.location的;
    VAR的查询= l.search？ （？l.search.replace（/ ^ \\ /，''）+ l.hash）：    VAR链接= document.querySelector（div.dl_startlink＆GT; DIV＆gt;将[HREF ='+查询+']）;
    如果回报（链接！）;
    l.href = link.href;
}，FALSE）;
 

新的code为Android：

  VAR候选人= document.querySelector（div.dl_startlink＆GT;的div）;
如果（！candidates.length）
    返回;
//最高zIndex的股利有*真正的*链接;其余的是无用的。
变种maxDiv =候选人[0];
对于（VAR I = 1; I＆LT; candidates.length;我++）
    如果（maxDiv.style.zIndex＆LT;考生[I] .style.zIndex）
        maxDiv =考生[I]
location.href = maxDiv.children [0] .href;
 

压缩版本：

<$p$p><$c$c>webView.loadUrl(\"javascript:window.addEventListener('load',function(){var%20candidates=document.querySelector('div.dl_startlink>div');if(!candidates.length)return;var maxDiv=candidates[0];for(var%20i=1;i<candidates.length;i++)if(maxDiv.style.zIndex<candidates[i].style.zIndex)maxDiv=candidates[i];location.href=maxDiv.children[0].href;},false)\");

I am trying to load a page and then run a javascript code on it, I found a Greasemonkey script that does the same, but I am having problems implementing the same thing in android, probably because I don't know anything about javascript.

This is the Greasemonkey script; it's supposed to a give a new link:

window.addEventListener("load", function ()
{   
    var link = document.evaluate("//div[@class='dl_startlink']/div/a[contains(@href,'"+window.location.href.match(/\?(.*)$/)[1]+"')]", document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
    if( !link.snapshotLength )
        return;     
    location.href = link.snapshotItem(0).href;      

}, false);

and this is how I want to run it:

public void onPageFinished (WebView view, String url) {
                System.out.println("webview loaded");
                webView.loadUrl("javascript:/*...........Javascript code here........*/");

           }

Any ideas on how I get that link and load that page in the webview? EDIT: Another version does the same thing.

var candidates = document.evaluate("//*[@class = 'dl_startlink']/div", document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
 if( !candidates.snapshotLength ) 
return;
//The DIV with the highest zIndex has the *real* link; the rest are useless.
- var maxDiv = candidates.snapshotItem(0);
- for( var i = 1; i < candidates.snapshotLength; i++ )
- if( maxDiv.style.zIndex < candidates.snapshotItem(i).style.zIndex )
- maxDiv = candidates.snapshotItem(i);
- location.href = maxDiv.children[0].href; 

解决方案

Ok, here's only simple Xpath query, which may be rewritten as CSS selector.

Also I decided to replace window.location.href.match(/\?(.*)$/)[1]. If my version will not work, replace first 2 lines with var query = window.location.href.match(/\?(.*)$/)[1];.

Actually, maybe even var query = window.location.search.replace(/^\?/,'') is enough.

window.addEventListener("load", function ()
{   
    var l = window.location;
    var query = l.search ? (l.search.replace(/^\?/,'') + l.hash) : ""

    var link = document.querySelector("div.dl_startlink > div > a[href='" + query + "']");
    if (!link) return;
    l.href = link.href;
}, false);

New code for Android:

var candidates = document.querySelector("div.dl_startlink > div");
if( !candidates.length) 
    return;
//The DIV with the highest zIndex has the *real* link; the rest are useless.
var maxDiv = candidates[0];
for( var i = 1; i < candidates.length; i++ )
    if( maxDiv.style.zIndex < candidates[i].style.zIndex )
        maxDiv = candidates[i];
location.href = maxDiv.children[0].href; 

Compacted version:

webView.loadUrl("javascript:window.addEventListener('load',function(){var%20candidates=document.querySelector('div.dl_startlink>div');if(!candidates.length)return;var maxDiv=candidates[0];for(var%20i=1;i<candidates.length;i++)if(maxDiv.style.zIndex<candidates[i].style.zIndex)maxDiv=candidates[i];location.href=maxDiv.children[0].href;},false)");

这篇关于如何转换这个Greasemonkey的code为JavaScript为Android？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！