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2016-12-14lua: make sure we always load a default themeMarc André Tanner1-0/+2
2016-12-14lua: improve error message when failing to load lpeg/lexer moduleMarc André Tanner1-1/+21
Differentiate between the case where the module is not found and the case where an error occured while loading it. This should make it easier to debug cases in which there is a Lua version mismatch between vis and lpeg.
2016-12-14lua: avoid errors if no theme is setMarc André Tanner1-7/+7
Close #429
2016-12-08vis-lua: move mode constants from vis.MODE_* to vis.modes.*Marc André Tanner1-6/+6
2016-12-08vis-lua: expose init event and use it to set default themeMarc André Tanner1-2/+0
The init event is emitted immediately after `visrc.lua` has been sourced, but before any other events have occured, in particular the command line arguments have not yet been processed. Close #422
2016-12-08lua: add simple event multiplexing mechanismMarc André Tanner1-8/+8
The editor core calls into the functions registered in the `vis.events` table which then multiplex the events to all registered event handlers. The first handler which returns a non `nil` value terminates event propagation.
2016-12-07lua: move non-core code out of vis.luaMarc André Tanner1-0/+119
The following structure is adapted: * visrc.lua entry point for all Lua code * vis.lua only implements the Lua part of the core API * vis-std.lua registers standard event handlers (e.g. syntax highlighting, statusbar handling, theme changes etc). It is sourced from vis.lua. * plugins/* non essential editor functionality, needs to be explicitly enabled by loading it from visrc.lua