vis-lua: add file.newlines to detect type of new lines

2 files changed, 17 insertions, 0 deletions

diff --git a/README.md b/README.md
index 2e6065c..7878c8a 100644
--- a/README.md
+++ b/README.md
@@ -593,6 +593,7 @@ At this time there exists no API stability guarantees.
    - `lines_iterator()`
    - `name`
    - `lines[0..#lines+1]` array giving read/write access to lines
+   - `newlines` type of newlines either `"nl"` or `"crnl"`
  - `window`
    - `file`
    - `syntax` lexer name used for syntax highlighting or `nil`
diff --git a/vis-lua.c b/vis-lua.c
index c25f64d..f3ec125 100644
--- a/vis-lua.c
+++ b/vis-lua.c
@@ -637,10 +637,26 @@ static int file_index(lua_State *L) {
 			lua_pushstring(L, file->name);
 			return 1;
 		}
+
 		if (strcmp(key, "lines") == 0) {
 			obj_ref_new(L, file->text, "vis.file.text");
 			return 1;
 		}
+
+		if (strcmp(key, "newlines") == 0) {
+			switch (text_newline_type(file->text)) {
+			case TEXT_NEWLINE_NL:
+				lua_pushstring(L, "nl");
+				break;
+			case TEXT_NEWLINE_CRNL:
+				lua_pushstring(L, "crnl");
+				break;
+			default:
+				lua_pushnil(L);
+				break;
+			}
+			return 1;
+		}
 	}
 
 	return index_common(L);