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@@ -183,6 +183,18 @@ harder. This also implies that standard library calls like the `regex(3)` functions can not be used as is. However this is the case for all but the most simple data structures used in text editors. +Syntax Highlighting using Parsing Expression Grammars +===================================================== + +[Parsing Expression Grammars](https://en.wikipedia.org/wiki/Parsing_expression_grammar) +(PEG) have the nice property that they are closed under composition. +In the context of an editor this is useful because lexers can be +embedded into each other, thus simplifying syntax highlighting +definitions. + +Vis reuses the [Lua](http://www.lua.org/) [LPeg](http://www.inf.puc-rio.br/~roberto/lpeg/) +based lexers from the [Scintillua](http://foicica.com/scintillua/) project. + Future Plans / Ideas ==================== @@ -456,6 +468,14 @@ Operators can be forced to work line wise by specifying `V`. show/hide special white space replacement symbols + cursorline (yes|no) + + highlight the line on which the cursor currently resides + + theme name + + use the given theme / color scheme for syntax highlighting + Each command can be prefixed with a range made up of a start and an end position as in start,end. Valid position specifiers are: @@ -579,5 +599,14 @@ In order to build vis you will need a C99 compiler as well as: * [libcurses](http://www.gnu.org/software/ncurses/), preferably in the wide-character version * [libtermkey](http://www.leonerd.org.uk/code/libtermkey/) + * [lua](http://www.lua.org/) 5.1.4 + * [LPeg](http://www.inf.puc-rio.br/~roberto/lpeg/) 0.12 (runtime + dependency required for syntax highlighting) + +If you want a self contained statically linked binary you can try +to run `make standalone` which will attempt to download, compile +and install all of the above dependencies. -Adapt `config.mk` to match your system and run `make`. +To build a regular dynamically linked binary using the system +libraries, simply run `make` (possibly after adapting `config.mk` +to match your system).
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