vis-lua: expose file save event to lua

Triggered after the new file content has been written to disk.

2 files changed, 8 insertions, 1 deletions

diff --git a/README.md b/README.md
index 284b80b..f640751 100644
--- a/README.md
+++ b/README.md
@@ -586,6 +586,7 @@ At this time there exists no API stability guarantees.
      - `start()`
      - `quit()`
      - `file_open(file)`
+     - `file_save(file)`
      - `win_open(win)`
      - `win_close(win)`
      - `theme_change(name)`
diff --git a/vis-lua.c b/vis-lua.c
index 91ce414..56b86ae 100644
--- a/vis-lua.c
+++ b/vis-lua.c
@@ -1513,7 +1513,13 @@ void vis_lua_file_open(Vis *vis, File *file) {
 }
 
 void vis_lua_file_save(Vis *vis, File *file) {
-
+	lua_State *L = vis->lua;
+	vis_lua_event_get(L, "file_save");
+	if (lua_isfunction(L, -1)) {
+		obj_ref_new(L, file, "vis.file");
+		pcall(vis, L, 1, 0);
+	}
+	lua_pop(L, 1);
 }
 
 void vis_lua_file_close(Vis *vis, File *file) {