Schadenfreude » javascript

Greasemonkey Script to get Jabber Room for Google Group Chat

Erik — Mon, 16 Mar 2009 03:23:28 +0000

So, today I was invited to Google Group chat for the first time. This would be really cool on a terminal that’s not equipped with an IM client, since it’s all done through the web with flash and magic. But, since I don’t like having 2 IM clients running at the same time (Pidgin and the Flash one from Google), I decided I needed to rip out the Jabber Group Chat Room name from the invite page. I got some tips from this site, and wrote a Greasemonkey script to do so.

All you have to do is copy the room name into the Join Chat window, and put in groupchat.google.com as the server. I hope you find it useful. If anyone knows how to make this a link that GNOME will throw at Pidgin, let me know. That would be awesome.

Get the Script

Photoslice in Bluecloth and Mephisto

Erik — Sat, 05 Jan 2008 21:49:00 +0000

So, I found this today, and it is awesome. I wanted it in Bluecloth so I could use it in Mephisto. Here’s how.

First, I needed to make it so I could still do normal images, but turn on coolness if I want. Here’s the goal I came up with for the grammar:


[![](thumburl.jpg)](imageurl.jpg "Scrolly Text at top" "photoslice")

Here’s the first test, with a single image:

And now a set with a namespace:

I did it by simply modifying the regex and image url parsing function in BlueCloth like so:

  InlineLinkRegex = %r{
    \(            # Literal paren
      [ ]*        # Zero or more spaces
      ?     # URI = $1
      [ ]*        # Zero or more spaces

      (?:         # title
        ([\"\'])    # Opening quote char = $2
        (.*?)     # Title = $3
        \2        # Matching quote char
      )?          # Title is optional
      [ ]*        # Zero or more spaces
      (?:         # rel
        ([\"\'])    # Opening quote char = $2
        (.*?)     # rel = $5
        \4        # Matching quote char
      )?          # rel is optional
    \)
    }x

    # and later...

        # ...or for an inline style second part
        elsif @scanner.scan( InlineLinkRegex )
          url = @scanner[1]
          title = @scanner[3]
          rel = @scanner[5]
          @log.debug "  Found an inline link to %p" % url

          text += %{} % escape_md( url )
          if title
            title.gsub!( /"/, """ )
            text += %{ title="%s"} % escape_md( title )
          end
          if rel
            rel.gsub!( /"/, """ )
            text += %{ rel="%s"} % escape_md( rel )
          end

I also added the following to my Mephisto theme layout, in the head section:


   
   
   {{ "photoslice/functions.js" | javascript }}

Once again, Ruby is awesome. And so is Markdown.

Fun with browser error pages

Erik — Fri, 26 Oct 2007 00:30:00 +0000

So, I though it would be interesting to mimic browser behavior with error pages. I decided I needed to make a page that looked exactly like the Firefox Server-not-found page. I managed to copy the source using Firebug, and I extracted the css out of the jar files on my system. Anyway, I ended up with some source for IE and some source for Firefox.

Test this in IE and Firefox

I left little invisible links in each one (search for ‘Supplies’ on the page). I also removed all the default javascript from the Firefox version and replaced the Try Again action with a simple reload one-liner.

Then, I just wrote some awesome PHP to take care of which one to load, and called it index.php:

And we’re done. Not bad, eh?

Sending Adblock Google Blockers Away

Erik — Sun, 19 Aug 2007 17:42:00 +0000

Of course I know that a simple Greasemonkey script can very easily thwart this, but I don’t expect most people to go out and find it to defeat this. If you don’t like my google ads, you can read this wonderful entry.


function sendJerksAway() {
      // Bye
      eval(unescape("%69%66%28%24" +
      "%24%28%75%6e%65%73%63%61%70%65" +
      "%28%27%25%35%62%25%36" +
      "%65%25%36%31%25%36" +
      "%64%25%36%35%25%33" +
      "%64%25%36%37%25%36%66%25%36%66%25" +
      "%36%37%25%36%63%25%36%35%25" +
      "%35%66%25%36%31%25%36%34%25%37%33%25%35%66" +
      "%25%36%36%25%37%32%25" +
      "%36%31%25%36%64%25%36%35%25%35%64%27%29%29%2e%6c" +
      "%65%6e%67%74%68%20%3d%3d" +
      "%20%30%29%20%64%6f%63%75%6d%65%6e%74" +
      "%2e%6c%6f%63%61%74%69%6f" +
      "%6e%20%3d%20%22%68%74%74%70%3a" +
      "%2f%2f%67%6f%6f%67%6c%65%2e%62%6c%6f" +
      "%67%6e%65%77%73%63%68" +
      "%61%6e%6e%65%6c%2e%63%6f%6d" +
      "%2f%61%72%63%68%69%76%65%73" +
      "%2f%32%30%30%37%2f%30%37" +
      "%2f%32%34%2f%67%6f%6f%67%6c%65%2d%72%65%63%6f%6d" +
      "%6d%65%6e%64" +
      "%73%2d%74%75%72%6e%69%6e%67" +
      "%2d%6f%66%66%2d%61" +
      "%64%62%6c%6f%63%6b%2f%22"));
}

Then it’s just this:

Precaching Images with Javascript

Erik — Tue, 17 Apr 2007 02:53:00 +0000

Today, Will told me about some awesome image caching. I used it.


//Do some image caching
cached_image = Array(new Image(), new Image(), new Image(), new Image());
cached_image[0].src="image1.jpg";
cached_image[1].src="image2.jpg";

It’s amazing.

Javascript blur problem

Erik — Wed, 04 Apr 2007 19:49:00 +0000

Today, I had a problem doing this:


 type='text' readonly onFocus="alert('manatee');this.blur();" />

The problem was it would go into an infinite alert loop. That’s not cool. The fix was to reverse the calls:


 type='text' readonly onFocus="this.blur();alert('manatee');" />