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basic movement commands implemented

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This commit is contained in:
cqc
2024-05-09 22:03:22 -05:00
parent f1653a93b4
commit db32a0e15e
1 changed files with 71 additions and 32 deletions
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103
ogui.ml
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@ -97,10 +97,10 @@ module TextBuffer = struct
| Some src ->
let srcn = String.length src in
assert (n < srcn);
let dst = Bytes.create srcn in
let ucn =
Uchar.utf_decode_length (String.get_utf_8_uchar src n)
in
let dst = Bytes.create (srcn - ucn) in
Bytes.blit_string src 0 dst 0 n;
Bytes.blit_string src (n + ucn) dst n (srcn - n - ucn);
Some (Bytes.to_string dst)
@ -980,36 +980,90 @@ module TextEdit = struct
(fun () ->
TextBuffer.fold_string t.text (fun s ->
let sn = String.length s in
let last_col = t.cursor.last_col in
let seol = Str.search_forward (Str.regexp "$") in
let bol =
Str.search_backward (Str.regexp "^") s
t.cursor.index
let next_bol =
min sn (seol s t.cursor.index + 1)
in
let eol = seol s t.cursor.index in
let bol' = min sn eol + 1 in
let eol' = seol s bol' in
let next_line_len = eol' - bol' in
F.epr
"Down: index=%d last_col=%d eol=%d eol'=%d \
bol=%d @."
t.cursor.index last_col eol eol' bol;
let next_line_len = seol s next_bol - next_bol in
(* F.epr
"Down: index=%d last_col=%d eol=%d eol'=%d \
bol=%d @."
t.cursor.index last_col eol' bol; *)
t.cursor <-
{
t.cursor with
index =
(bol'
(next_bol
+
if last_col > next_line_len then
if t.cursor.last_col > next_line_len then
next_line_len
else min next_line_len last_col);
else min next_line_len t.cursor.last_col);
}));
]
|> adds
[
[ Key (Press, P, [ Control ]) ]; [ Key (Press, Up, []) ];
]
[ Custom (fun () -> cursor_move t (-10)) ]
[
Custom
(fun () ->
TextBuffer.fold_string t.text (fun s ->
let sbol =
Str.search_backward (Str.regexp "^") s
in
let bol = sbol t.cursor.index in
if bol > 0 then (
let prev_bol = sbol (max 0 (bol - 1)) in
let prev_line_len = bol - 1 - prev_bol in
F.epr
"up: index=%d bol=%d prev_bol=%d \
prev_line_len=%d @."
t.cursor.index bol prev_bol prev_line_len;
t.cursor <-
{
t.cursor with
index =
(prev_bol
+
if t.cursor.last_col > prev_line_len then
prev_line_len
else min prev_line_len t.cursor.last_col
);
})));
]
|> adds (* EOL *)
[
[ Key (Press, E, [ Control ]) ]; [ Key (Press, End, []) ];
]
[
Custom
(fun () ->
TextBuffer.fold_string t.text (fun s ->
let bol =
Str.search_backward (Str.regexp "^") s
t.cursor.index
in
let eol =
Str.search_forward (Str.regexp "$") s
t.cursor.index
in
t.cursor <-
TextLayout.cursor ~last_col:(eol - bol) eol));
]
|> adds (* BOL *)
[
[ Key (Press, A, [ Control ]) ];
[ Key (Press, Home, []) ];
]
[
Custom
(fun () ->
TextBuffer.fold_string t.text (fun s ->
t.cursor <-
TextLayout.cursor ~last_col:0
(Str.search_backward (Str.regexp "^") s
t.cursor.index)));
]
|> adds
[ [ Key (Press, Backspace, []) ] ]
[
@ -1021,21 +1075,6 @@ module TextEdit = struct
t.text <- text;
cursor_move t (-1))
else Lwt.return_unit);
]
|> adds (* EOL *)
[
[ Key (Press, E, [ Control ]) ]; [ Key (Press, End, []) ];
]
[
Custom
(fun () ->
TextBuffer.length t.text >>= fun _textlen ->
TextBuffer.fold_string t.text (fun s ->
Str.search_forward (Str.regexp "$") s
t.cursor.index)
>>= fun index ->
t.cursor <- { t.cursor with index };
Lwt.return_unit);
];
(* WARN XXX TKTK TODO this is probably "breaking" the lwt context and being used in other calls to Lwt_main.run *)