vis: refactor Lua integration

Lua support can now be disabled at compile time using:

 $ make CONFIG_LUA=0

This commit also adds an initial Lua API and provides a few
default hooks.

We now also require Lua >= 5.2 due to the uservalue constructs.
In principle the same functionality could be implemented using
function environments from Lua 5.1.

1 files changed, 22 insertions, 0 deletions

diff --git a/vis-lua.h b/vis-lua.h
new file mode 100644
index 0000000..b0f1293
--- /dev/null
+++ b/vis-lua.h
@@ -0,0 +1,22 @@
+#ifndef VIS_LUA_H
+#define VIS_LUA_H
+
+#if CONFIG_LUA
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+#else
+typedef struct lua_State lua_State;
+#endif
+
+#include "vis.h"
+
+void vis_lua_start(Vis*);
+void vis_lua_quit(Vis*);
+void vis_lua_file_open(Vis*, File*);
+void vis_lua_file_save(Vis*, File*);
+void vis_lua_file_close(Vis*, File*);
+void vis_lua_win_open(Vis*, Win*);
+void vis_lua_win_close(Vis*, Win*);
+
+#endif
\ No newline at end of file