Greasemonkey脚本用于查找具有特定条件的行 [英] Greasemonkey script to find rows with certain conditions

问题描述

我尝试了一些不同的方法在表格中查找列包含特定链接的行。

I tried some different ways do find rows in a table where a columns contain a particular link.

我的目标：当链接到xyz时，替换图标与图像相同的行。

My goal: replace an icon when a link to xyz is in this same row as the image.

这是我到目前为止的代码段：

This is my snippet so far:

var rows = document.getElementsByTagName("tr");
for(var i = rows.length - 1; i >= 0; i--) {     
        var links = rows[i].getElementsByTagName("a");
        for(var k = links.length - k; k >= 0; k--) {
            if (links[k].href =="http://www.XXXX.net/forum/index.php?showforum=121"){
                var images = rows[i].getElementsByTagName("img");
                    for (var j=0;j<images.length;j++) {
                    images[j].src = "http://www.XXXX.net/forum/folder_post_icons/icon7.gif";
                    }
            }
        }
}

I我很确定这不是最好的概念。但正如您可能会看到我尝试搜索所有行中的链接，一旦找到论坛121的链接，我会尝试替换此特定行中的所有图像。

I'm pretty sure this is not really the best concept. But as you might see I try to search links in all rows and once the link to forum "121" is found, I try to replace all images in this particular row.

我得到的是现场的每个图像都被替换。

What I get is every image at the site getting replaced.

推荐答案

因为它很简单，所以这里有一个完整的脚本。

它使用 jQuery ，这里是一个方便的jQuery参考。请参阅选择器部分（与CSS选择器几乎相同）。

Since it's simple enough, here's a complete script that does that.
It uses jQuery and here's a handy jQuery reference. See, especially, the Selectors section (which are almost the same as CSS Selectors).

Re：什么我得到的是网站上的每张图片都被替换。 ...

这可能是因为搜索条件过于宽泛。如果它是一个设计不佳（使用表格布局）页面，每个图像可能在一个带有目标链接的表格行！

This maybe because the search criteria is too broad. If it's a poorly designed (uses table layouts) page, every image may be in a table row with a target link!

当发布Greasemonkey问题时，链接到目标网页，或者至少发布足够的网页HTML，我们可以调整GM脚本来匹配。

When posting Greasemonkey questions, link to the target page, or at the very minimum, post enough of the page's HTML that we can adjust the GM script to match.

无论如何，这将有效，可能有关目标页面的更多信息：

Anyway, this will work, possibly pending more information about the target page:

// ==UserScript==
// @name     _Replace image on custom-targeted row
// @include  http://www.XXXX.net/forum/*
// @require  http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js
// ==/UserScript==

//--- This may need tuning based on information not provided!
var targetLinks = $("tr a[href*='showforum=121']");

//--- Loop through the links and rewrite images that are in the same row.
targetLinks.each ( function () {
    //--- This next assumes that the link is a direct child of tr > td.
    var thisRow = $(this).parent ().parent ();

    //--- This may need tuning based on information not provided!
    var images  = thisRow.find ("td img");

    //--- Replace all target images in the current row.
    images.each ( function () {
        $(this).attr (  
            'src', 
            'http://www.XXXX.net/forum/folder_post_icons/icon7.gif'
        );
    } );
} );

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