網絡暴民 Jacky’s Blog

I found that my rssget script is not working in Firefox 3 beta for some of the link. After some investigation, the cause seems to be the difference in redirection handling. In Firefox 2, when GM_xmlhttpRequest() is fired, it would follow status like 302 to do the redirection to return the correct page response to the onload function. However, in Firefox 3, the onload would receive a status like 302 and thus the script would fail.

I don’t know whether it is the responsibility for the browser or the script to handle redirection like this. I have changed the script itself to follow the redirection. The code is like:

I’ve only included status 301 to 303 for the time being. Then it will try to get the ‘Location’ from its header and finally invoke another GM_xmlhttpRequest(). A little trick here is to use arguments.callee to recur itself.

The updated script is tagged as 1.5 in the code site . You will only need it if your script fail in Firefox 3.

When it comes to focus the first text field on a page using jQuery , the usual solution would be:

This query means to find the first of input text field(s), which is/are visible and enabled. However, this would also extract text field(s) which is/are under a display:none parent(s). So a more complete way would be:

The filter here would try to determine if the text field is a descendant of a hidden ancestor. The usage of slice(0,1) instead of get(0) is to keep the chainability. A test page is put up here .

Finally, you may wrap it up with a plugin:

So that you can do this:

I just wonder if there is any ‘selector-only’ solution for this?

Update: It turns out that the child’s visiblity would override parent’s visibility. So the filter should only check display none:

I’ve updated the demo page .

jQuery 的 Validation plugins 是很強大的，基本上可以滿足各種需要。剛剛被一個小問題困擾了好一陣子，特此記下。我寫了類似的東西：

結果怎樣也出不到那個自訂的 validation rule，苦苦深研追踪 source code 後才發現，問題在於 addMethod 裏的 method 參數問題，而正確的寫法是：

那個 method 的參數數量如果大於 3，plugins 會認為你所加的是有參數的 validation，即在 element class 可能是 {special:abc} 之類，所以當看到 input 裏只是 special 就不會偵測到。

這樣很「正路」吧？但花了不少時間去看才知道。

蘋果日報最近推出了 動新聞 不過又沒有 RSS，所以特地用 Dapper 打造了其首頁連結的 RSS ，大家可以拿來用。

美中不足的是只有標題連結，沒有內文，所以我更新了 取全文油猴腳本 ，可以照辦煮碗按 ‘G’ 取全文，大家可以點選安裝： Google Reader 版 、 Bloglines 版 、 Bloglines Beta 版 。

(RSS用戶可能看不到影片，請點到本站看 screencast)

這次試用一下 freescreencast.com 的服務，來介紹一下我做網摘的流程，一 take 過，中間有少許「蝦碌」，反應有些遲鈍，不過懶得再錄了。錄的過程還算是相當簡單，只不過 mouse cursor 怪怪的。

這不能算是教學影片，因為一些都是很 tailor-made 給我自用的，例如我的 wordpress 裏有使用 textile，所以會輸出格式為 textile 的連結。不過重點是：

• 使快捷的工具，例如使用 del.icio.us bookmark toolbar 就比起用 bookmarklet 快得多
• 在摘時寫 description，將工作分散成很多小份，留在最後一定寫不了的
• 可以自動化的地方就自動化，例如用 bookmarklet 幫手轉格式