1 files changed, 79 insertions, 0 deletions
diff --git a/lib/headlines.ml b/lib/headlines.ml
new file mode 100644
index 0000000..8fab7f6
--- /dev/null
+++ b/lib/headlines.ml
@@ -0,0 +1,79 @@
+module Grep = Grep
+module Common = Common
+open Notty
+
+let content = Grep.get_headlines () |> Grep.parse_headlines
+let content_pretty = content |> Grep.pretty_format
+
+let rec headline_screen t (((x, y) as pos), scroll) =
+  let img =
+    let dot = I.string A.(fg black) ">" |> I.pad ~l:0 ~t:(y - scroll)
+    and elements =
+      Array.mapi
+        (fun i el -> I.strf ~attr:A.(fg black) "%s" el |> I.pad ~l:2 ~t:i)
+        (Array.to_seq content_pretty |> Seq.drop scroll |> Array.of_seq)
+    in
+    let open I in
+    Array.fold_left (fun sum el -> el </> sum) dot elements
+  in
+  let _, size_y = Common.Term.size t in
+  Common.Term.image t img;
+  let content_length = Array.length content_pretty in
+  let scroll_up () =
+    let scroll = if y - scroll = 0 then max (scroll - 1) 0 else scroll in
+    headline_screen t @@ ((x, max (y - 1) 0), scroll)
+  in
+  let scroll_down () =
+    let scroll = if y - scroll >= size_y - 1 then scroll + 1 else scroll in
+    headline_screen t @@ ((x, min (y + 1) content_length), scroll)
+  in
+  match Common.Term.event t with
+  | `End | `Key (`Escape, []) | `Key (`ASCII 'q', []) | `Key (`ASCII 'C', [ `Ctrl ]) -> ()
+  | `Mouse (`Press (`Scroll s), _, _) ->
+    (match s with
+     | `Down -> scroll_down ()
+     | `Up -> scroll_up ())
+  | `Resize _ -> headline_screen t (pos, scroll)
+  | `Mouse ((`Press _ | `Drag), (_, y), _) ->
+    headline_screen t ((0, min y content_length), scroll)
+  | `Key (`ASCII 'j', []) | `Key (`ASCII 'N', [ `Ctrl ]) -> scroll_down ()
+  | `Key (`ASCII 'k', []) | `Key (`ASCII 'P', [ `Ctrl ]) ->
+    let scroll = if y - scroll = 0 then max (scroll - 1) 0 else scroll in
+    headline_screen t @@ ((x, max (y - 1) 0), scroll)
+  | `Key (`Arrow d, _) ->
+    (match d with
+     | `Up -> scroll_up ()
+     | `Down -> scroll_down ()
+     | _ -> headline_screen t ((x, y), scroll))
+  | `Key (`ASCII 'e', []) | `Key (`Enter, []) ->
+    (* Editor might be set with extra args, in that case we need to separate these *)
+    let[@warning "-8"] (editor :: args) =
+      String.split_on_char ' ' (Sys.getenv "EDITOR")
+    in
+    let selected_file, _ = Array.get content y in
+    let full_path_file = Grep.execution_directory ^ "/" ^ selected_file in
+    let full_args = Array.append (Array.of_list args) [| full_path_file |] in
+    Common.Term.cursor t (Some (0, 0));
+    let _ =
+      Unix.create_process_env
+        editor
+        full_args
+        (Unix.environment ())
+        Unix.stdin
+        Unix.stdout
+        Unix.stderr
+    in
+    let rec run_editor () =
+      match Unix.wait () with
+      | _, _ ->
+        Common.Term.cursor t None;
+        headline_screen t ((x, y), scroll)
+      (* Capture resizing events *)
+      | exception Unix.Unix_error (Unix.EINTR, _, _) -> run_editor ()
+      | exception Unix.Unix_error (_, _, _) -> failwith "ERROR"
+    in
+    run_editor ()
+  | _ -> headline_screen t (pos, scroll)
+
+
+let start () = headline_screen (Common.Term.create ()) ((0, 0), 0)