Howto:Syntax highlighting for Nasal: Difference between revisions
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[[File:gEdit-nasal-syntax-highlighting.png|400px|thumb|Screen shot illustrating syntax highlighting in gEdit]] | |||
'''Philosopher''' on the FlightGear Forum has created a syntax highlighter for gEdit- a popular and simple Text Editor for Mac OSX and Linux. | '''Philosopher''' on the FlightGear Forum has created a syntax highlighter for gEdit- a popular and simple Text Editor for Mac OSX and Linux. |
Revision as of 07:56, 16 August 2012
There's Nasal syntax-highlighting support available for some editors, which is a big advantage, as it makes Nasal coding much easier. It can often point to syntax errors and so reduce the number of tedious time-consuming and unproductive FlightGear runs.
Notepad++
http://dl.dropbox.com/u/1463693/nasal.xml
Instructions are here: http://superuser.com/questions/62474/notepad-custom-syntax-highlighting-setting-where-to-look-for-it
jEdit
There's a syntax highlighting mode for jEdit, programmer's text editor
Included are some of Nasal's internal functions and those functions currently implemented in NasalSys.cxx To use, add the content of the catalog inside your own catalog (do NOT overwrite the file) and nasal.xml in /home/USER/.jedit/modes
Restart jEdit and you can use it. Current extension is .nas, you can add your own extension and functions. This mode is heavily based on the Javascript mode.
Get it here: http://www.jedit.org/
gEdit
Philosopher on the FlightGear Forum has created a syntax highlighter for gEdit- a popular and simple Text Editor for Mac OSX and Linux.
http://theomegahangar.flymerlion.com/downloads/nasal.lang
Download the nasal.lang file from the link above and:
If you use Mac, move it into your Applications/gedit/Contents/Resources/share/gtksourceview-2.0/language specs folder. And for linux, move it into your /usr/share/gtksourceview-X.0/language-specs folder.
Vim
It also makes understanding other people's code easier. One such editor is the free vim or its gui variant gvim.
It's not for everyone but it's free, and testing it doesn't hurt: http://www.vim.org/.
The syntax definition file comes with the FlightGear code (http://gitorious.org/fg/flightgear/blobs/next/scripts/syntax/nasal.vim). Highlighting works even for Nasal embedded in XML files (type ":set ft=nasal", where ft stands for file-type)
Here's an example, which demonstrates a short code segment with three syntax errors as well as the highlighting of a matching pair of parentheses (yellow) and trailing spaces (blue x). (The leading blue dots aren't on by default. They help to spot tab crimes.)
Other editors
Nasal being syntactically very close to other programming languages like C, Php or JavaScript, you can get some usable highlighting even without real Nasal support:
- TextMate [1]
- SciTe [2]
- gEdit (Linux) : Using the 'Octave' highlighting mode, most of the nasal functions work.
FlightGear Wiki
A common approach in code examples on the wiki is to use php syntax highlighting beween <syntaxhighlight>
:
<syntaxhighlight lang="php"> # hello.nas print('Hello World!'); </syntaxhighlight>
Which renders into:
# hello.nas
print('Hello World!');