Category Archives: Users

Code Folding Updates

As you may know the Kate code folding implementation gets some love these days. The last days, several bug fixes dropped in by our GSoC student. And the good news is that if all works well, we’ll be able to backport these fixes so that the code folding is much more robust in our beloved Kate even in KDE 4.7.x. These changes probably fix several crashes that were around since 2005 as well. I believe the word we’re looking for is: owned! :-)

Kate Vi Input Mode – GSoC 2011

I want to introduce you my GSoC-2011 project. I was working on improvement the vi input mode for the Kate part.

There are a lot of improvements for normal mode. Now it’s able to use jump list by pressing ctrl-i/ctrl-o in normal mode like in vim. And now not only registers but also marks, and jumps stored in the config of the session. H, M and L commands moves cursor to the first(Home), Middle and Last line of the screen. To go to the any percent of the document you can use the % command by typing the number of percent(1-100) before it. gk and gj motions will make you able to go visual(display) lines up and down. It’s useful when you using line wrap.

You can split the screen vertically and horizontally by ctrl-s and ctrl-v shortcuts and move around them in different directions using ctrl-w{h,j,k,l,w} or also ctrl-w{←,↑,↓,→}.

In insert mode added commands ctrl-r+[register] to insert the contents of a register and ctrl-o to switch to the normal mode only for a one command and automatically get back to insert. The ctrl-a, ctrl-x command now increase and decrease the negative numbers too.

There are also some new command-line features. Now you can use the marks for a command ranges. It’s possible to add and subtract line numbers in the ranges many times. For example command :.+3d will delete the third line after current position and the command :’a,’b-1y will yank the line-wise range between the line of mark ‘a’ and the one line before the line of ‘b‘ mark.

Also there a some new basic vim commands:

  • :d or :delete – delete range;
  • :c or :change – change range;
  • :j – join all the lines in range;
  • :> – indent range;
  • :< – unindent range;
  • :y or :yank – yank range;
  • :ma or :mark or :k – set mark;
  • :bn – switch to next buffer(document);
  • :bp – switch to previous buffer(document);
  • :bf – to first buffer;
  • :bl – to last buffer;
  • :b [N] or :buffer [N] – to Nth buffer

Text objects are also improved and fixed. There are new objects: ( a{ , i{ , a< , i< , a` , i` ). And now they normally works with nested objects. So for now the i( object (for position of multiply symbol *) will be “(1*2/(2+3)–4)” instead of “(1*2/(2+3)–4)”. Some of the objects like (),{},[],<> works with several lines.

Visual mode now is integrated with mouse, so the mouse dragging starts the visual mode. All kind of Kate-way selection is also starts the visual mode. For example if you use “Select all” menu line or shortcut ctrl-a(by default) this will starts visual mode with the selected text and waits you for a command to execute :) . One point mouse click will exit the visual mode. Kate selection and vi mode selection is actually the same thing now. So you can, say, to select a bloc by using the Visual Block mode (ctrl-v), to do a context menu on them and to copy them to a clipboard :). When you exit visual mode the ‘< and ‘> marks have a start and end position of selection. It useful when you want to execute some command line command on the selected text. Just press the “:” when you select something and it automatically fill the command line with “‘<,’>” to have a quick access to selected area.

Vi marks and Kate bookmarks are integrated too. If you set the mark then this line becomes bookmarked by Kate. And vice versa: if you set a Kate’s bookmark and there no vi marks on this like vi mode sets the vim mark on this line and zero column, and shows you what letter for this mark is used.You can see the position of all vi marks in the bookmark menu in the menu bar or also in the context menu.

I hope this features will make you feel even more comfortable while using Kate. You can try it now in the git version of Kate.
Any notice or bug report are welcome !

GSoC 2011 – Kate Code Folding – (Try Kate’s new code folding)

Hi everyone!

Kate’s new code folding was merged with the master branch. :)
You can try it by yourself. If you do find any bugs, please send a bug report on KDE’s bug tracker or leave a comment here.
I will use a test unit to solve those bugs, so I will need a full backtrace and some info to help me replicate it.
Please notice that there are no new features added yet – just the basic code folding.

I’m waiting for your feedback!

Kate Modeline Editor

As you may know, Kate supports the concept of document variables, also known as modelines. In short, document variables can be used to set Kate settings local to a file. For instance, this is useful for settings specific indenter options than the ones defined in Kate’s settings dialog. Assume you work on two projects, the first indents with spaces and the second with tabs, then you can simply add a modeline that contains the specific document variables that set the specific indentation properties.

While the concept is very mighty, it is not intuitive to use: You have to know the exact syntax and correct varialbes and their valid values.

To improve this for the next KDE release (v4.8?), Kate gained a variable / modeline editor this week:

If you click the Edit button, a list view pops up showing all valid document variables with the valid values. Right now, this editor is included only in the “Modes & Filetypes” config page. However, the idea is to support it in the context menu over a Kate modeline in the text editor area as well.