vis-lua: add file.modified property

2 files changed, 6 insertions, 0 deletions

diff --git a/README.md b/README.md
index 2abd17f..a714645 100644
--- a/README.md
+++ b/README.md
@@ -607,6 +607,7 @@ At this time there exists no API stability guarantees.
    - `lines[0..#lines+1]` array giving read/write access to lines
    - `newlines` type of newlines either `"nl"` or `"crnl"`
    - `size` current file size in bytes
+   - `modified` whether the file contains unsaved changes
  - `window`
    - `file`
    - `cursors_iterator()`
diff --git a/vis-lua.c b/vis-lua.c
index 50d0596..3a68fd9 100644
--- a/vis-lua.c
+++ b/vis-lua.c
@@ -822,6 +822,11 @@ static int file_index(lua_State *L) {
 			lua_pushunsigned(L, text_size(file->text));
 			return 1;
 		}
+
+		if (strcmp(key, "modified") == 0) {
+			lua_pushboolean(L, text_modified(file->text));
+			return 1;
+		}
 	}
 
 	return index_common(L);