GSoC 22 – The Closing Blog Post
In the summer of 2022, I participated in Google’s Summer of Code, contributing to the Thunar file manager at XFCE, with the help of my mentor Alexander Schwinn. It’s been about a month since my GSoC term was officially over, and after a hectic couple weeks, I’ve finally decided to sit down and write down the closing blog post.
New features in Thunar
I’ll start off by introducing the features that I worked on, and a rough idea of how the implementation for the same works. Of these, undo-redo and file counts for folders are already merged on master and have been released with Xfce 4.18. The tour probably does a much better job than I will here, so be sure to go through it as well!
Undo-redo
This is the big one. While adding support for undo and redo, one of the most crucial things for me was doing it in an elegant way that would make it easy to have multi-level undo and redo.
How we decided to do this was to maintain a global linked list, containing information about the last performed operation, including what type of an operation it was, what files were involved in it, etc. This allowed it to be as trivial as moving a few pointers around to keep track of the state of the system once an undo or a redo is performed. The actual undo/redo operation is simply executing either the inverse of the last performed operation, or executing the exact same operation that was last undone.
I’m of course glossing over a lot of the details that made this a fair bit harder than we had initially anticipated. Nonetheless, with some help from Alex, we were able to ship this in time for the 4.18 release! :raised_hands:
File counts for folders
Adding file counts for features was just a little addition to help better utilize the ‘size’ column for folders, which was essentially wasted space earlier.
It was essential to be asynchronous with its implementation, which turned out to be a bit trickier than I had initially expected. It mostly boiled down to a line of conversions between file abstractions that I had taken for granted would have a low overhead (spoiler alert: they did not have a low overhead).
Gallery view
I was less than confident when first approaching Gallery view, since I thought I’d have to create an entire view from scratch. Luckily, that really wasn’t necessary. I was able to make a new view based off the same abstract view class that the existing icon view used. This is probably better for multiple reasons, since building on existing things makes for much simpler design for the new additions, and easier code review as well.
While I initially had envisioned a masonry image gallery, like the kind you would see on sites such as Pinterest, the abstract icon view lent itself much better to a square icon based gallery, similar to what most Android phone galleries have by default these days.
The gallery view PR is not yet merged into master, needing a few minor fixes on the dialog tooltips (which I’ve sadly been a bit too busy to work on yet), before it’s completely ready.
Not all smooth sailing
While I had initially hoped to complete what I had mapped out in my GSoC proposal in my summer vacations itself, that didn’t work out as intended. Once my semester at college started, I started struggling a bit to balance my academics and my GSoC commitments, but I was steadily making progress.
GSoC being flexible with its contributor timelines this year was an absolute life-saver, since I had to extend my deadline multiple times in order to hit the milestones on my proposal.
The lowest point was when in the midst of all this, some personal family issues cropped up and I essentially went incommunicado for almost a week. This would’ve been enough to fail my proposal in some organizations, but Alex still gave me a chance to make up on lost time when I was back, and for that I’m incredibly grateful. I was able to capitalize on this opportunity and get plenty of work done, though it was really quite hard (and probably not very good for my health long term :sweat_smile:).
Advice for others
I recently received an email from someone who was looking to contribute to XFCE in this year’s GSoC, and wanted some advice. I’ll relay part of what I wrote back over here:
I’d say the most important thing is to dive into it while still knowing that you don’t know anything :P
Try at a problem with your intuition for what might work. If you get stuck, push for another 15-20 mins and note down what you try. In this time you should be consulting documentation, StackOverflow, Github issues etc.
If you still aren’t able to figure it out, send a message on the XFCE IRC/Matrix channel, and be descriptive about what you tried, why you think it should work, and why you think it might not have worked. The mentors are incredibly helpful, and you’ll often get an answer that will deepen your understanding of the system and coding in general.
In addition, I’d also like to stress that communication is key!. Your mentors are there to help you, and they want nothing more than a successful and productive summer for the both of you. Raising issues that you’re facing as early as you can allows the both of you to think about and discuss how to tackle them.
Acknowledgements
I’m incredibly grateful to my mentor Alexander Schwinn, who is one of the most helpful people I’ve had the pleasure of working with. He’s been incredibly kind and polite, more than one could reasonably expect out of anyone given the circumstances.
I’m also very thankful for all the help I’ve received from the dedicated XFCE community, including Sergios Kefalidis, Yonghwa Hong, Gaël Bonithon, and many others.
Finally, I’d like to thank Google Summer of Code for the wonderful opportunity, which has definitely been a fantastic hands-on learning experience for me.
GSoC 22 – The First Blog Post
I’m really looking forward to this summer, since my project proposal for this year’s Google Summer of Code has been selected! I’ll be working on adding features to Thunar file manager, an XFCE application, with the help of my mentor Alexander Schwinn.
My history with XFCE
I’ve been big on open-source ever since my school days, and actually ran Xubuntu (an Ubuntu distribution with XFCE as its desktop environment) on my daily driver, an old netbook back in eleventh grade. It was too slow of a device to run GNOME, so I absolutely had to use a lighter-weight desktop environment, and compared to alternatives like LXDE which I didn’t like the aesthetics of, and pantheon (the default DE for elementaryOS) which still felt lacking in terms of performance, XFCE was the perfect balance of form and functionality.
Since then, I’ve done some distro-hopping before settling on my current setup, hand-rolled with awesome window manager and no DE. While I generally prefer to use the command-line, Thunar has been by GUI file manager of choice ever since I started using this setup a little over 2 years ago. It’s fast, light-weight, and gets the job done without getting in your way, which is exactly what I need.
Planned features
Thunar does however lack a few features that would be really handy to have, which is exactly what I’ll be working on.
Undo-redo
Adding undo and redo is an absolute no-brainer for me, and would probably be the single biggest thing I think Thunar is currently missing. If you’re anything like me, you’ve often selected the wrong file to move into another directory, and you have to manually undo it and move the correct file once you realize your mistake. Implementing this would do away with such frustrating tedium in the case of minor mistakes.
File counts for folders
Currently, the list view in Thunar has a ‘size’ column which shows the size of the corresponding file in the listing. However, this column is blank for folders (or directories). As such, it’s essentially wasted space for directories, but it could be put to good use showing the count of the files in the folder instead.
Picture-specific maximized thumbnail view
Managing pictures is primarily based on the content of the picture itself, rather than metadata like the name, date etc. So it would be very convenient to have a specific view optimized for folders with a large number of pictures, where the thumbnails take up as much space on the screen as possible. Think Pinterest, Google images etc.
If somehow I complete the work enlisted in my proposal ahead of time, I plan on looking at some of the file system synchronisation bugs that some Thunar users have reported.
Conclusion
I’m glad to have the opportunity to be able to work on open-source tools I myself use everyday, and feel really lucky to have the support of Google to be able to work on this over this summer. I’m really grateful for the help I’ve gotten along the way to getting my proposal accepted from Sergios Kefalidis, Alexander Schwinn, and other members of the XFCE community.
I’d like to congratulate my fellow XFCE GSoC contributors Yogesh Kaushik and Amrit Borah as well (who coincidentally are also from different IIITs :grin:).