My picasa widget hasn’t been updated for quite a long time. Since then, there was a new widget API – the old widget worked without any problems because the new API is backward compatible, however those API calls are now deprecated. Meanwhile, I’ve received a lot of comments regarding the plugin and I’ve used that input to reshape the features of the update. Thank you all for your comments.

The new widget is a complete rewrite of the old widget. Earlier all options for plugin was in the widgets section. The new version adds a new options page to the “Settings” menu. Once you have installed the plugin, make sure to set your username on the picasa settings page. Once this is done, It’ll download the photo information and cache them. I’ve also added an option to list out the albums in this plugin. So, once the username is set, you can go to the widgets page and add any number of widgets – there you’ll get a list of albums, photo size and number of photos for each widget instance.

If you have uploaded new photos to the picasa albums, you can go to the options page and click on the “Refresh Cache” button to download new photos. Even if you have forgotten to do this, the photos will automatically get updated based on the cache lifetime you have set.

That’s all the features for now – I’ll add more features along the way once the base functionality of stable. Please remember, this is pretty much a complete rewrite, there might be few bugs here and there. If you have found any bugs, make a small comment here

Download from here

Sinhala language has been used in computers for a long time. In the beginning, it was simple ASCII fonts, replacing the English glyphs with sinhala letters. However, sinhala unicode came to play around in 2004. Around that time, we built a search engine converting ASCII text to unicode, so that it can search sinhala text written in any font. Actually, that’s how Paradox Software started. There were few blocks with rendering the unicode fonts, and people weren’t exactly using them. However, those problems are solved with newer releases and sinhala unicode is extensively used today.

You might have seen that there is a english to sinhala dictionary developed by UCSC Language Lab. It’s released under GPL as a firefox addon. Today, I extracted the words from the addon database and built a spell checker for firefox.

Following python code is used to extract the words from sqlite database :

#!/usr/bin/env python
import sqlite3
import re

conn = sqlite3.connect('en-si.db')
c = conn.cursor()
c.execute("select * from dict")
out = file("words","w")
for row in c:
  words = re.split(r"[ |]",row[1])
  for i in words:
    out.write(i.encode("utf8")+"\n")
out.close()

After that simply running, “cat words | uniq | sort > words.sorted” produced a sorted uniq list of words. The “affixcompress” tool comes with hunspell generated the affix rules file and I’ve placed some rules to support some common mistakes.

Install the addon from here. Once after you installed, you can right click a textbox, enable spell checking and select Sinhala as the language.

(Don’t ask me how සොක්කා got recommended for මඤ්ඤොක්කා)

Download the final source here

One of my browsing habits is to look for wikipedia articles. If it’s a movie, I look for imdb. So, instead of spending 1/2 seconds to go through results and analyze site address, i decided to write a simple greasemonkey script.

You can grab the script from here. If you have your own list of sites, you can simply edit the source(greasemonkey provides you a simple interface) and change the “sites” array.

But it’s annoying to burn a CD for each distro you are going to try. One option is to use a USB drive. Unfortunately, my USB flash drive is USB1.0 but my motherboard only allows me to boot from USB2.0 devices. Another options is to copy the files into a new partition, and install grub/syslinux on that partition – but It’s not a good idea to mess around with partitions.

After experimenting a little bit with the ISOs and grub configuration, I manage to boot the distro, from the file resides in a sub directory of root.

Note : I used following commands in Ubuntu 8.10 – the file locations might be different based on your distribution.

Puppy Linux

Puppy linux is a light weighted, very small distro, yet contains most of the important applications for the daily use. In my opinion, this is a nicely designed great distro. My network card and video card worked without giving any trouble, but the sound card failed.

This distro is specially designed aiming towards portable users, who will run the distro in either a USB or a CD. Puppy linux uses squashfs compressed files to keep it’s root file system, and the init scripts are searching for these files in all hard drives, cdroms, and usb drives. So the installation is really easy.

1. Download the image, and mount it to a directory.

sudo mount -o loop puppy-linux.iso /media/cdrom

2. Create a directory in your root partition and copy the files from iso.

sudo mkdir /puppy
sudo cp -r /media/cdrom/* /puppy/

3. Modify your grub config file(/boot/grub/menu.lst) pointing to the puppy kernel and initrd file. Here is the menu entry I added, you’ll have to change the root according to your disk configuration.

title		Puppy Linux
root		(hd0,0)
kernel		/puppy/vmlinuz
initrd		/puppy/initrd.gz
quiet

That’s it – you can reboot the computer, select Puppy Linux from grub and boot.

Good OS – gOS

gOS is a distribution based on ubuntu designed for web 2.0 internet users (Latest version specially aims toward myspace users). I can’t really see a practicle advantage of using gOS, despite the fact that theming and dock is superb. Other than that, it’s just firefox bookmarks on desktop(dock).

The gOS root file system is also packed in a squashfs file, but the init scripts are different. So, the installation is bit tricky.

1. Mount the gOS image.

sudo mount -o loop gos-space.iso /media/cdrom

2. Then you’ll need the squashfs file, kernel and the initrd file.

sudo mkdir /gos
sudo cp /media/cdrom/casper/filesystem.squashfs /gos
sudo cp /media/cdrom/casper/vmlinuz /gos
sudo cp /media/cdrom/casper/initrd.gz /gos

(Note : You can also extract the squashfs file and make the process simpler, but that’ll require much more free space.)

3. When we do changes in the OS, we need those to be persistence. So, I choose to save changes on a file. Following commands will create a 500MB file, and format it as a ext3 drive.

sudo dd if=/dev/zero bs=1048576 count=500 of=/gos/filesystem.ext3
sudo mkfs.ext3 /gos/filesystem.ext3

4. Now we need to configure the init scripts to use our files for root file system. So, first extract the initrd file.

cd /tmp
cp /gos/initrd.gz ./
gunzip initrd.gz
mkdir content; cd content
cpio -i < ../initrd

Now you have the initramfs on /tmp/content

5. We need loop, squashfs, and unionfs drivers. Edit the "conf/modules" file and append following.

squashfs
loop
unionfs

6. The default init script will get the "root" kernel parameter and mount it as "/root" in initramfs. We need a script to remount our files. Create a file called gos in scripts/init-bottom and paste the following content. (gedit scripts/init-bottom/gos)

#!/bin/sh -e
# initramfs premount script for gos

PREREQ=""

# Output pre-requisites
prereqs()
{
	echo "$PREREQ"
}

case "$1" in
    prereqs)
	prereqs
	exit 0
	;;
esac

mkdir /realroot
mount --move ${rootmnt} /realroot
mkdir /sqroot
mount -o loop /realroot/gos/filesystem.squashfs /sqroot
mkdir /extroot
mount -o loop /realroot/gos/filesystem.ext3 /extroot
mount -t unionfs -o dirs=/extroot:/sqroot none ${rootmnt}

Make the file executable.

chmod a+x scripts/init-bottom/gos

7. Create a new initrd file, and replace the old file.

cd /tmp/content
find . | cpio --quiet --dereference -o -H newc | gzip > ../initrd.gz
cp /tmp/initrd.gz /gos/initrd.gz

8. Edit your grub config file(/boot/grub/menu.lst) to boot from it. You'll need to change the devices according to your disk configuration.

title		gOS
root		(hd0,0)
kernel		/gos/vmlinuz root=/dev/sda1 rw quiet single
initrd		/gos/initrd.gz
quiet

First time we have to boot in the single user mode and configure the system.

9. Before rebooting, we need to create a fstab. To do that, we have to mount our ext3 filesystem.

mkdir /tmp/gos
sudo mount -o loop /gos/filesystem.ext3 /tmp/gos
sudo mkdir /tmp/gos/etc

10. Copy the following content into /tmp/etc/fstab. (/dev/sda5 should be your swap partition - check your /etc/fstab)

unionfs	/	unionfs rw 0 0
tmpfs	/tmp tmpfs nosuid,nodev 0 0
/dev/sda5	none            swap    sw              0       0

11. Now reboot your computer and select "gOS" from grub. It'll boot into single user mode(called maintenance mode in ubuntu). Once you get into shell, create a user, and configure your X. There are two nice wizards, you can just follow those.

user-setup
dpkg-reconfigure xserver-xorg

12. Reboot back to your main OS and edit the grub - simply remove the "single" parameter. (You can also mount the root partition within the gOS single user mode, and change grub)

title		gOS
root		(hd0,0)
kernel		/gos/vmlinuz root=/dev/sda1 rw quiet
initrd		/gos/initrd.gz
quiet

Now, reboot and enjoy. This process is obviously bit long, and not perfect. So, if you are going to keep using that distro, I recommend you install it on a separate partition.

Here is a list of choices I made :

Operating System : Linux

There are lot of reasons why you should use linux : easy access to software, no viruses/adware, fast, possibility of configuring every bit. There is also a long list reasons why you shouldn’t run linux, which I don’t agree with most of them, except some great Windows only(may be Mac supported) software like Photoshop; and few drivers.

Desktop : GNOME
Simple elegant interface. Pretty stable.

Window Manager : compiz (compiz-fusion)
Rather than the cool 3D effects, there are some really useful plugins in compiz. For example : Expo, Scale.

Web Browser : Firefox 2
Firefox 3 has some great fixes on critical bugs like memory leaks, but there is one flaw. Some of the plugins I’m using are not available/stable for Firefox 3. So, I’ll stick to Firefox 2 for few more months.

Mail Client : Thunderbird
I’m not a heavy user of the desktop mail clients. I only use thunderbird for one of my mail accounts. There is no specific reason I’m choosing thunderbird over evolution, just like the interface.

IM : piding / emesene
Pidgin is one of the best multi protocol IM clients available in linux(kopete is also nice). Depicts the fact it supports many protocols, that’s only basic features. Most of my friends are using MSN network, and emesene is capable of handling those, and thousand times better than the crappy aMSN interface.

VOIP : Skype
Just one word : clear

IRC : xchat
Nice interface.

File Transfer (ftp/sftp) : Filezilla/GVFS
If I’m using a separate client for file transfer, that would definitely filezilla, but it’s much easier to mount the shares directly using GVFS and use it like a local directory.

Word Processing : abiword
It’s a light weighted, really fast word processor. Even though it’s light weighted, all necessary features are there.

Graphics : Adobe Photoshop
Yes, Adobe Photoshop, that’s the best I’ve ever seen. I never got along with gimp. Anyhow, I rarely mess with graphical stuff, yet I still miss Photoshop.

Text Editor/IDE : gedit
Simple, clean interface and have syntax highlighting. I can survive without an integrated debugger.

Video Player : mplayer/vlc
Those will play almost anything.

Audio player : banshee
Banshee has a nice audio library management features. Similar artists + cover info rocks.
Worth mentioning : one of the best media library management softwares I’ve seen is Windows Media player.

Twitter Client : twitux
Very stable, with many features. twhirl is stunning, but adobe AIR still doesn’t support tray icons on linux.

File Sharing : bittorrent
The content is reliable – well you have to read the comments.

Torrent client : azureus
Many features + plugins. I’m using the webui plugin, with auto start init script. (If you are curious, there is a azureus command line option : –ui=console)

Email Service : gmail / Google apps
It’s the cool ajax interface. The usage of conversations instead of individual mails is also remarkable. I’m using google apps to handle my gunathilake.com domain.

RSS Reader : Google Reader
Easy to use. Rather than a desktop RSS client, I can access it from anywhere. When I’m at somewhere with an internet connection killing time, I always have something to do. The sharing feature is handy too.

Photo sharing : Picasa
It’s the desktop application – It’s easier to upload.

Blogging platform : wordpress
Wordpress is a solid, easy to use platform. From a developers point of view, it’s internal structure is amazing.

Bookmarking : foxmarks
I tried to use social bookmarking sites like del.icio.us. But I don’t bookmark much, so I just use the firefox builtin bookmarking. I don’t want to experience losing my bookmarks again, that’s why I’m using foxmarks.

Web Developer plugins : firebug / web developer toolbar
Just check the plugins – you’ll see.

Virtualization : VirtualBox
I’m using VirtualBox to access IE to test sites. VirtualBox has nice integration features like free mouse.

What I read
Except reading my friends blogs, here are few feeds from my RSS reader.

• Techcrunch – I believe they have spies all over the world. Anything related to startups, it’s over there. Easy to keep track of what’s happening on the internet.
• Linux today – Everything related to linux/open source
• Gnome planet – Some nice content over there, related to gnome.
• ReadWriteWeb – This is like techcrunch. Techcrunch gives you more news, this will give you analysis/comparisons.
• Smashing Magazine – A source to get inspired – collections of creative work all over the internet.

But as for today, generally, the online applications and desktop are separated. Gnome Online Desktop tries to bridge the gap between those two.

This weekend, I gave it a trail run. Here it goes :

Installation

I installed the system on Ubuntu Gusty, which doesn’t have online desktop is repositories (I think only fedora have them). So, I had to build from the sources. I followed the building guide they have given on using jhbuild.

Then, I installed gnome dependencies for ubuntu. There were problems with the installation. “gtk-doc” was not there. So, I just ignored it and installed other packages. Then, there was a conflict between “libxul-dev” and “xulrunner-1.9-dev“. “apt-cache show libxul-dev” indicated that version is “1.8.x.x”, so I only installed “xulrunner-1.9-dev“.

First, I installed jhbuild from repositories(sudo apt-get install jhbuild). Then, created the .jhbuildrc file as it says, and tried the command. But it started to complain about a “lib_packages” variable. I googled for it, and the first hit was from the same page. Apparently, the wiki page have been updated very recently, and the script has been changed(to non-working version). So, I edited “.jhbuildrc” file, and removed “addpath(‘PYTHONPATH’, os.path.join(lib_packages, ‘gtk-2.0′))” line. Now, jhbuld is working fine, but for the obvious reasons, apt-getting from ubuntu, doesn’t install the “online-desktop” module. So, I removed it, and got the jhbuild from gnome SVN.

Now, it started to build 101 packages. Normally, if I was emerging in gentoo, I would go for a tea, have a nap and come back later. But since I ignored “gtk-doc” and “libxul-dev“, I knew those two would fire back later. After going through many packages, it complained about the gtk doc. By analyzing the error message, I managed to install “gtk-doc-tool“, and it continued. Then again, some xul errors popped up. It was complaining that some “idl” files are missing. Going through “/usr/share/idl” revealed that both “unstable” and “stable” are installed, thus those are in sub directories. Once I moved to “/usr/share/idl/xulrunner/unstable” to “/usr/share/idl/xulrunner/“, and done same with the “/usr/includes/xulrunner/unstalbe“, it worked fine and compiled all packages. Then, I followed the rest of the guide, and logged out(I created the session “.desktop” on “/usr/share/xsessions/” instead of “/etc/X11sessions“).

Login In

I crossed my fingers, and logged into the gnome online desktop session. Gnome startup splash was followed by the bug-buddy saying mugshot crashed. I just ignored it, and continued. The sidebar said I’m “nobody” and firefox started with the session. Then, I clicked “enable online desktop”, and it took me to “online.gnome.org” which I successfully logged in. But the desktop still says, I’m “nobody”.

I suspected this might be related to mugshot, so I ran mugshot from terminal again. This time, it ran without any problems. Then, I close firefox, and went through the login process again, but it’s the same results. After going through some files, I found there is a firefox extension, and that was not installed. There was a shell script called “firefox-update.sh”, but running it didn’t help, instead it created some broken symlinks. Then, I created a symlink manually to “od/lib/mozilla/extensions/ {longstring}/firefox@mugshot.org” in “/usr/lib/firefox/plugins“. Then, the extension loaded, but still it’s the same results.

Then, I killed few hours with mugshot-client and bigboard source code, but didn’t come up with anything. The last chance was thinking that something is wrong with gconf settings. So, I logged out, created a new user, and logged back in.

Playing Around

Mugshot crashed as usual at the startup, but then I ran it again it gave a black and white tray icon. It was a long shot, but I was lucky! Online authentication worked. The problem with my used account must be either mozilla settings or dbus settings.

However, mugshot icon turned into purple and suddenly it crashed(Just after I logged in from web interface). So, I saved the bug report, and started to play around a little bit. The sidebar downloaded my information(name,photo,online services) from the gnome online account and displayed those, but I already know those Of course those are useful as much as bookmarks. Then, the “recent documents” from places menu is moved to sidebar. That’s a good choice, quick access.

The next stock in sidebar is “Applications“. It showed some applications like “Firefox”, “Terminal”. It also showed “Thunderbird” as not installed, which is actually installed and used exclusively :-/ So, I wanted to change the list of applications showed there. The Application Main panel is quite attractive and nicely build. It’s very easy to find applications. However, only very limited set of applications can be added to the sidebar. I can understand everything else, but this? I’ve no clue.

Then the “people” stock was there, but unfortunately I don’t have any friends on my mugshot account. It only showed some generic user called “Gnome Online”(or something similar). I accidentally added another email address to “Gnome Online”, then I found out there is no way to remove that. The only option was to just remove that user(There is no point of keeping a bot with wrong addresses associated with it). Once I logged into gtalk via pidgin, the people stock got filled with my gtalk contacts list. But it’s just some photos+names, nothing else.

I added the “Google Mail” account, and it worked without giving out any problems. After a complete swap of the sidebar, It felt like nothing is new in online desktop. So, my next guess was there must be something amazing in mugshot client.

Mugshot Adventure

I googled for a little bit about what mugshot client do, but didn’t find any useful information. Then, I checked mugshot bugzilla to see whether anyone else has got these problems. But I was alone. So, I fired up Xchat, joined #gnome-hackers on GimpNet. However, I didn’t get any replies(that’s my bad timing, the channel was very quite when I was dropping there – probably most of the people are sleeping).

The Online Desktop getting started said something about mugshot-client should be bootstraped. I had no idea what that means, so I logged back into my normal *perfect* gnome desktop(By the way, I’m a big gnome fan ), and ran “jhbuild bootstrap“. Then, it installed 14 more packages. So, I cleared the built file from mugshot-client checkout directory using “make clean” and executed the mugshot-client build command(“jhbuild build meta-online-desktop -t mugshot-client“).

Here comes the trouble again – it gave me weird error saying “hippo canvas python module not found” – which the files/headers are there. Then, I rebuild several other modules like “hippo-canvas, desktop-data-model, gnome-settings-daemon, online-desktop” and tried building “mugshot-client” but nothing worked. Then, it must be something I did with the bootstrap command – I’m not even a little bit familiar with jhbuild, so I decided the best thing to do is rebuild everything from scratch.

First, I removed the install directory. Then, cleared the build files in the checkout directory. The “bash” saved me from lot of trouble. I didn’t have to worry too much about going into each directory and running “make clear“. If you are interested, following are the two commands,

for x in `ls *.tar.gz *.tar.bz2`; do
	rm -rf `echo $x | sed 's/.tar.gz$//;s/.tar.bz2$//'`;
done
for x in `find | grep Makefile$`; do
	make -C `echo $x | sed 's/\/[^\/]*$//'` clean;
	rm $x;
done

After clearing everything, I ran the full build command along with the “time” command. After 1 hour, 59 minutes and 49 seconds, it finished(2.4Ghz dual-core 2GB RAM).

Then, I re login to online desktop and now it’s worst; both bigboard(sidebar) and mugshot-client crashed. They must have just committed a non-working version on bigboard around that time However, bigboard bug was simple, they were trying to integrate google docs(good news!!) – and gdata.gdocs package was not there. I simply removed “import gdata.docs as gdocs” line from “bigboard/google.py“, and sidebar is back in business.

The bug-buddy was a real rescue buddy on musgshot-client. I changed few lines of code, and it’s started working again. (I didn’t exactly fix it – Just changed some lines that it wouldn’t crash, just work barely). However, the result was not what I expected, it’s just getting the updates from mugshot site, and displays the notifications.

Speaking of mugshot site, it let users integrate many services into one feed, which seems to be a great idea, but since I don’t have any friends on mugshot, I couldn’t really experience it. My idea is it would be a much easier to keep track with friends this way.

Programmers point of view aka “Thoughts of a coder”

From the users point of view, online desktop doesn’t have any killer features *yet*. Anyhow, reading of some of design documentation enlightened me The technology used is online desktop is XMPP, which means, it’s using push technology instead of pull; less bandwidth usage, less server load, quick response time.

Just like most of other opensource products, they also have core libs which helps other developers to tap into the system, and make use of that. This means a real integration between all desktop-online bridging applications.

Conclusion

Simple conclusion, it’s not ready yet. Of course, it should be – I built it from the trunk. Anyhow, considering the large number of gnome developers, and super cool gnome desktop, I feel like online desktop is not upto it’s full potential. A lot of simple yet effective improvements can be done, like improving the “Applcation” stock, or “Workspace Switcher”. I’m not sure why they are only adding people from “Gtalk/XMPP/..” connections to people stock(probably something with the design). Most of my friends are using MSN(may be I’ll check whether I can create a plugin for emesene to throw out some dbus signals).

The good news is, once the basic core framework of online desktop is much stable, developers will create some stunning integration apps.

Precisely, this is something you should checkout, but I’m not exactly sure how soon.

This is April, which is supposed to be the best month of Sri Lanka with festivals/celebration. But there is a price to pay, thundering (Last year, lighting took my laptop ). My connection goes down for each 10 minutes.

So, while jhbuild downloading a module, the connection goes down, and when I restart jhbuild, download doesn’t continue from where I left off. It downloads the whole file again. So, here is a very simple one line hack to prevent that from happening to you.

In jhbuild/versioncontrol/tarball.py, line 171, add a command line option “-c” to wget command. If you are not happy with “wget”, you can change it to whatever you want(prozilla,aget,d4x).

I’m still building online desktop (101 packages :-/ ), can’t wait to see what it can do.

Speaking of the new features, the admin dashboard is really slick and customizable. You can see have a glance of what is going on with your blog in few seconds. The dashboard was there for a long time, but the interface highlights the information quickly.

Another feature I noticed was plugin upgrades. The wordpress upgrading process recommend disabling plugins beforehand. So, when I return back to plugins to activate plugins, there were some light yellow bars informing me about the updates of plugins, and more interestingly there is a link to upgrade automatically. Just of a click of that upgraded the plugin without giving any problems.

I just figured out while writing this post, the old upload form is no longer there. Instead there are set of buttons called “Add media”, which links to media library. You can now easily add photos/videos/audios to your post without any problems.
Edit : First, I thought wordpress is integrated with flash audio/video player, or when you gave a youtube url, it automatically embeds the video, but it turned out to be just pasting the link. However, the uploading is rather nice than the earlier version.

I’m glad they haven’t seem to change any API/hooks, so the plugins that used to work before will hopefully work without any changes. My plugin “Picasa Photos” just worked. Overall, it’s a pretty good release with fairly noticeable features. Worth upgrading.

Now, it’s your turn.

However, after quite long time, I did some web programming with Paradox. Today, I played around Apache Solr as a database backend to improve the searching capabilities. The results are amazing, it gives a very powerful storing and indexing schema and nice query language to do the queries. PHP can communicate with the server using REST. Solr has the ability to generate output in many formats, including PHP serialized objects. However, the easiest I found is JSON output (You’ll have to install php-json extension).

Solr explanation from the site :
Solr is an open source enterprise search server based on the Lucene Java search library, with XML/HTTP and JSON APIs, hit highlighting, faceted search, caching, replication, and a web administration interface. It runs in a Java servlet container such as Tomcat.