Archive for January, 2010

30 Days to Becoming an Opera Lover

The 30 Days to Becoming an Opera 6 Lover series may very well have been what pulled me over the edge. That which made me choose Opera instead of MyIE2 (now Maxthon). It should therefore be no surprise that I still harbor warm feelings toward it. While it may be old, and the original series is no longer hosted by TnT Luoma as far as I can tell, I think that the series could still teach current (aspiring) users of Opera a thing or two — even the 30 Days series for Opera 6. Due to the large part the Opera 6 series played in my personal discovery of Opera, however, my judgment may be somewhat impaired.

I dug into the Internet Archive and I was pleasantly surprised to discover that the 30 Days series for Opera 6 is available through the archive in a nice ZIP file. The original Opera 6 lover pages do not seem to have been preserved, but the ZIP file is easier to use regardless.

The 30 Days series for Opera 8 was also preserved.

While I would not recommend a detailed read (it is quite outdated after all), I would certainly recommend skimming through most of it.

By the time Opera 8 came out — and consequently, the 30 Days to Becoming an Opera 8 Lover series — I was already a seasoned Opera user, so the series didn’t do much for me. I did discover one very important Opera feature thanks to it, however. In the default keyboard setup, Shift + F2 is bound to go to nickname. If you don’t know what nicknames are, you can give bookmarks so-called nicknames; if you type them out in the address bar and press enter it will take you to the bookmark, and it will offer autocomplete suggestions while you’re typing. Useful, but not a huge time saver.

Go to nickname is better, because it starts going to the nickname as soon as it’s got a match. So if you have only one bookmark with a nickname that starts with a, you’ll only have to type a and you’ll be on your way. I had not realized this prior to reading the Opera 8 Lover series, and it wasn’t actually written in the series, but without it I might very well never have tried this feature again. After some consideration and major inspiration by Moose I rebound F2 to new page & go to nickname, which means that ever since, pressing F2 automatically opened a new page and this tremendously useful dialog. The introduction of speed dial didn’t do much for me thanks to this keyboard shortcut. It might take a few seconds more to configure, but it’s worth it. Additionally, new tabs will open even faster if you disable speed dial.

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Teaching WordPress Some Manners: Enabling Day/Month/Year Archives

WordPress can’t cope with day/month/year (/%day%/%monthnum%/%year%/) permalinks properly by default. I had no idea because I’ve always used year/month[/day]. It’s fine for the posts, but in the archives /date/month/year fails. Luckily WP (WordPress) supports plugins in a clever manner, and it has a great API (application programming interface).

Initially I tried the WP API:

add_rewrite_rule('date/(\d{1,2})/(\d{4})', 'index.php?m=$matches[2]$matches[1]', 'top');

This kept giving me an error which I couldn’t (be bothered to) debug since it went several functions deep into the WP core, so I gave up on the API and circumvented it with the help of something I found.

Anyhow, here’s the plugin. Save in a file named rewrite-day-month-year.php or just name it whatever you like.

<?php
/*
Plugin Name: Rewrite Rules for Day/Month/Year
Plugin URI: http://fransdejonge.com/2010/01/teaching-wordpress-some-manners-enabling-daymonthyear-archives
Description: WordPress can't cope with /%day%/%monthnum%/%year%/ for some reason. That is to day, it fails when you try to go for an archive in the form of /date/month/year/ This teaches it some manners. Probably/hopefully shouldn't interfere with other structures, but why you'd activate it if you don't need it I wouldn't know.
Version: 1.0
License: GPL
Author: Frans
Author URI: http://fransdejonge.com

Based on http://dd32.id.au/files/wordpress/test-rewrite.php
*/

function test_add_rewrite_rules( $wp_rewrite ) {
	$new_rules = array(
		"date/(\d{2})/(\d{4})" => 'index.php?m=' . $wp_rewrite->preg_index(2) . $wp_rewrite->preg_index(1),
		"date/(\d{4})" => 'index.php?year=' . $wp_rewrite->preg_index(1)
	);
	$wp_rewrite->rules = $new_rules + $wp_rewrite->rules; //NOTE: You must add it to the start of the array, Else WP's greedy rules at the end of the array will eat the request
}

register_activation_hook( __FILE__, 'flush_rules_initiate' );
register_deactivation_hook( __FILE__, 'test_flush_rules' );
// add_action('init','test_flush_rules'); // for testing

function flush_rules_initiate() {
	// Add the permalink override stuff
	add_action('generate_rewrite_rules', 'test_add_rewrite_rules');
	test_flush_rules();
}

function test_flush_rules(){
	//Flush the rewrite rules so that the new rules from this plugin get added,
	//This should only be done when the rewrite rules are changing, Ie. When this plugin is activated(Or Deactivated), For simplicity while developing using WP Rewrite, I flush the rules on every page load
	global $wp_rewrite;
	$wp_rewrite->flush_rules();
}
?>

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Unobtrusive Input Value Modifier

Inputs that say things like “search here” are generally messed up. In this post I will first explain why and then I will show you how to do it properly.

Ignore everything that follows, other than perhaps the text about what not to do. You should now use <input placeholder="some text">, as HTML 5 support is now sufficiently common. Also note that the placeholder attribute typically isn’t sufficient by itself.

The WordPress theme I’m modifying for my wife had the following HTML in it:

<input type="text" value="Search this site" onfocus="if (this.value == 'Search this site') {this.value = '';}" onblur="if (this.value == '') {this.value = 'Search this site...';}" name="s" id="searchbox" />

There are three main problems with this.

  1. It prefills the search box with “Search this site.” This is incredibly annoying and obnoxious behavior for people with Javascript disabled. If you must add such text, add it through Javascript.
  2. The values don’t even match up, so if you focus on the INPUT, deselect it and select it again the text stays there. Even for users with Javascript enabled. Errors of this type could easily be avoided if the text value were stored in a variable.
  3. Which brings me to the third problem. The script should be external so it can be cached. That would save bandwidth for both you and your visitors and if there are people with Javascript disabled, they won’t even have to load the junkscript once.

Because just about every such box I have ever encountered is complete and utter crap (this is actually one of the better ones), I decided to reproduce its functionality in an unobtrusive manner, eliminating all of the mistakes I outlined above.

The HTML is now reduced to this:

<input name="s" id="searchbox"/>

You could remove the trailing slash if you’re writing HTML, or put a space in between if that’s the way you write XHTML, but that’s of no consequence otherwise. The type="text" is not essential because it’s the default, but it shouldn’t hurt to leave it in. Also see Anne van Kesteren’s Optimizing Optimizing HTML for some tips on going somewhat over the top with minimalism.

The Javascript that changes the text to “Search this site…” is now in an external file:

(function() {
	function searchbox_text_change() {
		var s = document.getElementById('searchbox');
		var s_text = 'Search this site...'
		if (s.value == '') s.value = s_text;
		else if (s.value == s_text) s.value = '';
	}
	document.addEventListener('DOMContentLoaded',
	function(){
		var s = document.getElementById('searchbox');
		searchbox_text_change();
		s.addEventListener('focus', searchbox_text_change, false);
		s.addEventListener('blur', searchbox_text_change, false);
	},
	false);
})();

All of this took me about five minutes. There’s a tiny bit of redundancy going on, but I can’t be bothered to fix that. It’s superior to just about any stupid such script I ever encountered and likely to most of the same type that I will encounter in the future. Use this script as much as you please. You don’t even have to link back to me, since I just want those bloody things to work in a way that doesn’t make me cringe.

The same kind of principle applies to autofocus junk. Never ever do any such thing if I started typing something. I’d rather you never did it at all, but if you really feel that you must do it for some masochistic reason, at the very least check if the value is still empty with if (s.value=='').

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Taking Sidenotes to 2010

Five years ago there were lots of posts dealing with people’s visions of the least-bad method to include sidenotes — or footnotes — to HTML, and like any self-respecting HTML-geek I created my own take on the matter. As might be expected from five year old writings it is now outdated, and I’m glad it is. It means the cruft can be retired, and media queries can be used to their full glory — except in IE8, that is.

The script I wrote to supply non-Opera browsers with faux-media-query functionality assumes that any browser not Opera should have the script applied to it, because at the time Opera 7+ was the only browser that supported media queries. I knew this wasn’t exactly the proper way to write scripts, but it was meant to be updated to use some more intelligent detection at some point. As such things go, however, it never was. In my defense, the worst the script did was duplicate some functionality that was already provided by media queries, so I rather doubt anybody noticed any adverse effects. Heck, they might have noticed positive effects, since as I wrote at the time, “For now, it might even be the best solution to apply the Javascript to Opera as well, because Opera does not reapply media queries on resize yet (and it does fire the onresize event as every browser does).” For good measure I’m also including the script as I used it on my website since 2006. It has this nifty little added feature that it doesn’t actually do anything if there are no sidenotes present, which is something media queries cannot do. I think I considered writing a more intelligent check based on style features that would be set by the media query back in early ’06, but I can’t recall why I never did. For those interested in hacking the old script, the way I set it up it should be possible to determine whether media queries are supported very easily by combining a test for at least medium width with the marginRight style property on the sidenotes. If set, media queries are working; if not, go ahead and do some scripting magic.

Now, on to the updated sidenotes. I abandoned absolute positioning in favor of going completely for float. I believe I wanted to do this originally, but there were too many float bugs in all kinds of browsers to make it viable (that means everything not Presto or KHTML). Since these appear to be fixed, there is no reason not to take full advantage of floats, which most important means using clear so that sidenotes will not overlap.

I still think my original reasoning is quite valid, however, which means I don’t think sidenotes should be inserted lightly or contain overly long texts.

Let’s start out. How do we markup a sidenote? Well, as HTML contains no way whatsoever to markup a foot- or sidenote, the logical choice is small. Why small? Well, it means that the content of small is less important. A footnote should not be a footnote at all if it’s as important, or more important than the text itself, right? Thus, the markup of the sidenote is as follows:

<small class="sidenote">A sidenote</small>

This is still what I use, but ASIDE would be more appropriate in HTML 5.

The sidenote as I created it is meant to be put at the end of a sentence, inside a paragraph. Therefore it would be displayed at its original position in the text if author CSS was disabled, or read at its intended location on screenreaders. If it wouldn’t be put as a separate sentence, it would look strange if not displayed the intended way. The sidenote is placed inside the paragraph with the other text, for if it would require multiple paragraphs, should it be a sidenote?

There is one issue I didn’t take into account five years ago. For example, including two paragraphs or so of background information on a country or city in a sidenote would be an appropriate use of sidenotes since it’s not really a part of the text. My original stance (although not explicitly written) was that this should be solved with hyperlinks, but I have somewhat revised this stance. The markup would then become something like:

<div class="sidenote">
	<h3>Were Sidenotes Always Compatible With Any Element?</h3>
	<p>You could always apply the <code>sidenote</code> class to any element, such as <code>P</code> or <code>DIV</code>.</p>
</div>

Or in HTML 5:

<aside>
	<h3>Were Sidenotes Always Compatible With Any Element?</h3>
	<p>You could always apply the <code>sidenote</code> class to any element, such as <code>P</code> or <code>DIV</code>.</p>
</aside>

The main sidenote CSS is still very similar to what it was in 2005.

.sidenote {
	background: #efd;
	display: block;
	float: right;
	clear: right;
	width: 200px;
	border: 1px solid #eee;
	border-right: 0;
	margin: 2px;
	margin-right: -20px;
	padding: 3px;
	text-indent: 0;
	cursor: help;
}
.sidenote:before { content: '\2190' ' '; }
.sidenote:hover {
	background: #ff0;
}
/* enable usage of code in sidenotes without the layout breaking  */
.sidenote code {
	white-space: normal;
}

There are a few minor differences, but other than the addition of the .sidenote code line nothing worth mentioning. Only a few weeks ago I noticed that adding a line of code to a sidenote somewhat broke my layout because it stretched beyond the viewport. A few more global ways to accomplish normal white space in sidenotes come to mind (such as !important in the main class or .sidenote *), but from what I understand using such methods increases parsing time, if only ever so slightly.

The media queries performing the sidenote magic were significantly slimmed down, and a low-resolution in-line display was added:

@media all and (max-width: 350px) {
	.sidenote {
		display: inline;
		float: none;
		border: 0;
		margin: 0;
	}
	.sidenote:before {content:"";}
}
@media all and (min-width: 750px) {
	#wrapper{margin-right:207px}
	.sidenote {
		border-right:1px;
		margin: 0;
		margin-right:-228px;
	}
}
@media all and (min-width: 980px) {
	#wrapper{margin-right:auto}
}

Switching completely to float makes it possible to keep the overrides to a minimum, but that’s not the important change here. I switched to simple media queries for two reasons.

  1. It’s much easier to maintain and change. No more duplication.
  2. I don’t think most media types are as relevant anymore as I did back then. Specifically, in regard to such things as handheld devices what I want to do is offer different layouts based on screen size, not on whether they consider themselves to be handheld, screen, or some other fancy media type. Safari on the iPhone considers itself a big browser, for instance, but should it really get the “big” layout? None of this is especially relevant for my sidenotes, but it does reflect my opinion on it. Additionally, specifically overriding for certain media types rather than being specifically inclusive makes sure that no one is left out. In other words, this is future-safe. If the media type magazine ever emerges (they already did a magazine with an eInk cover, didn’t they?), my media query is ready for it now. And for those who care about such things, it also avoids an IE bug or two.

That’s it. My sidenotes are ready for the nearby future. They’re so 2010. Feel free to use or expand on my ideas, but please add a link back to me somewhere if you do.

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Mounting Remote Filesystems With sshfs

This is a condensed and edited version of the Ubuntu Blog guide regarding how to mount a remote ssh filesystem using sshfs, based on my personal experience.

Before you can use sshfs, you’ll need an SSH server. This is useful for all kinds of things, but that’s not important here. To set up an SSH server in Ubuntu, all you need to do is sudo apt-get install openssh-server. Setting it up in Cygwin (like I did to access my Windows box, and to tunnel VNC through it) is a bit trickier, but there are decent tutorials out there. Once that’s taken care of, you can set up sshsf.

sudo apt-get install sshfs
sudo mkdir /media/dir-name
sudo chown `whoami` /media/dir-name
sudo adduser `whoami` fuse

Log out and log back in again so that you’re a proper part of the group.

Mount using sshfs [user@]host.ext:/remote-dir /media/dir-name; unmount using fusermount -u /media/dir-name.

It all worked perfectly for me, but if not, there’s apparently a solution.

If you get the following error:

fusermount: fuse device not found, try ‘modprobe fuse’ first

You will have to load the fuse module by doing:
$sudo modprobe fuse

You can add fuse to the modules that are loaded on startup by editing the file /etc/modules and adding a line with only the word “fuse” in it, at the end.

and then issue the sshfs command above again.

If you’re on Windows, don’t panick. Dokan SSHFS will perform the same task.

It should be noted that this is even easier within KDE applications, where you can simply use fish://your-server.com, but sshfs cooperates better with the rest of my system. Trying the same with Dolphin in KDE on Windows results in a KIOslave going crazy using all the CPU it can, however.

Aside from easy editing of files directly on my Windows box, this finally enabled me to stream videos from my Windows box, although right now only lower quality ones since it’s also connected through WLAN. With Samba things just weren’t working out, and the same applied to FTP (though it was better for file transfers than Samba, I have to say). Admittedly, this still actually uses FTP under the hood, but it just works better. Besides it will also be more secure to use remotely thanks to SSH.

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Grub2 Brilliance

This is what update-grub outputs (I keep typing grub-update because it just seems more logical):

$ sudo update-grub
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-2.6.31-16-generic
[…]
Found Windows 7 (loader) on /dev/sda1
[…]
done

This is what /etc/default/grub wants to set the default boot entry:

GRUB_DEFAULT="Windows 7 (loader) (on /dev/sda1)"

Thanks. That really made things so much simpler.

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Using exiv2 to Help Manage Your Pictures

Installation

As always, in Ubuntu it’s a piece of cake with sudo apt-get install exiv2.

Adjusting Exif Date/Time

With exiv2, exiv2 ad -a [-]HH[:MM[:SS]] file does the job.

For example, my camera was still on DST when I shot my new year’s fireworks pictures, which made them appear as if they were shot at 1 AM. Thus, I ran the command exiv2 ad -a -1 *.JPG to fix it.

Using a Command File

I use a file named exif-copyright-2010.txt (and another one for 2009 etc.) with just two lines in it, which I apply instantly when grabbing pictures from my camera. This file contains the following lines.

add Exif.Image.Artist	Ascii	"My name"
add Exif.Image.Copyright	Ascii	"Copyright © 2010 My name"

This can be applied using exiv2 -m /somewhere/exif-copyright-2010.txt file. I used to mess about with batch processing in graphical applications — which worked fine — but this is much faster.

Read More

You can read more about all of this on the official website.

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Updates on Twitter

I don’t care much for Twitter. The maximum message length of 140 characters is extremely limiting and, unless you resort to chatspeak, it’s hard to say anything meaningful in such a limited space. If you do resort to chatspeak, it won’t look meaningful even if it is. Catch 22! I imagine the best way to say something meaningful is to link to a blog post offering more explanation, or maybe I’m just prejudiced against chatspeak. Regardless, since most people comment on blog posts using Twitter, and everybody and their grandparents is using it, I figured I should look into a way to utilize it in a more meaningful way than logging in about once a year.

microblog-purple offers convenient integration into Pidgin, which I already use for chatting.

That’s what it is, after all: a chat service with a 140-character limit — most chat services offer at least 500 characters or so. At least it has better offline and history support than most. You also need to enable the plugin named Twitgin so you get a character count on the window where you communicate with Twitter.

Since, like I said, almost everybody uses it, I figured it might also be a good idea to announce new blog posts on Twitter automatically. I searched around a bit in the forest of Twitter plugins and WP to Twitter sounds like it best meets my needs. This post is a test of the plugin, and it announces my partial submission to the crowd — not submission in the sense of Islam, but submission in the sense of realism.

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Fireworks on the Scheldt

Last night I decided to try to take some pictures of fireworks without a tripod. Considering the freezing temperatures I knew I was in for disaster, but with plenty of space available on my memory card, that didn’t really matter.

Fireworks and lots of smoke
Large
(290 KB)
Pretty dots
Large
(258 KB)
The more falling kind of fireworks
Large
(270 KB)

I think the most important thing we just observed is that if you want to take nice pictures of fireworks, you should probably not stand upwind — although considering the distance involved that would have taken almost as long as the fireworks lasted (about 20 minutes). I did zoom in quite a bit. On the other hand, you’ll miss some or most of the smell of gunpowder if you do that, which is an important part of the watching experience, after all.

Happy new year!

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