From 87dcfa6edd43316068347ff5b8f23c76bdc7b472 Mon Sep 17 00:00:00 2001 From: Marc Coquand Date: Thu, 30 May 2024 10:04:25 -0500 Subject: Add half-screen down/up scrolling --- lib/done.ml | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) (limited to 'lib/done.ml') diff --git a/lib/done.ml b/lib/done.ml index 18e7b89..5b8ad2c 100644 --- a/lib/done.ml +++ b/lib/done.ml @@ -87,13 +87,15 @@ let rec render in Common.Term.image t img; let content_end = Array.length content_pretty + (content_start - 1) in - let scroll_up () = - let scroll = if y - content_start - scroll = 0 then max (scroll - 1) 0 else scroll in - render t { state with pos = x, max (y - 1) content_start; scroll; output = None } + let scroll_up ?(amount = 1) () = + let scroll = + if y - content_start - scroll - amount < 0 then max (scroll - amount) 0 else scroll + in + render t { state with pos = x, max (y - amount) content_start; scroll; output = None } in - let scroll_down () = - let scroll = if y - scroll >= size_y - 1 then scroll + 1 else scroll in - render t { state with pos = x, min (y + 1) content_end; scroll; output = None } + let scroll_down ?(amount = 1) () = + let scroll = if y - scroll >= size_y - amount then scroll + amount else scroll in + render t { state with pos = x, min (y + amount) content_end; scroll; output = None } in match Common.Term.event t with | `End | `Key (`Escape, []) | `Key (`ASCII 'q', []) | `Key (`ASCII 'C', [ `Ctrl ]) -> () @@ -132,6 +134,10 @@ let rec render Input_prompt.render t input_state | `Key (`ASCII '1', []) -> goto_headlines (fun () -> render t state) | `Key (`ASCII '2', []) -> goto_todo (fun () -> render t state) + | `Key (`ASCII 'D', [ `Ctrl ]) | `Key (`Page `Down, []) -> + scroll_down ~amount:(size_y / 2) () + | `Key (`ASCII 'U', [ `Ctrl ]) | `Key (`Page `Up, []) -> + scroll_up ~amount:(size_y / 2) () | `Key (`ASCII 'h', []) -> let hide_file_name = not hide_file_name in let content_pretty = -- cgit v1.2.3