aboutsummaryrefslogtreecommitdiffhomepage
path: root/ide/utils/okey.ml
blob: 580f1fbcb3e4168e49db8ecfe101f0a77e7c0db9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
(*********************************************************************************)
(*                Cameleon                                                       *)
(*                                                                               *)
(*    Copyright (C) 2005 Institut National de Recherche en Informatique et       *)
(*    en Automatique. All rights reserved.                                       *)
(*                                                                               *)
(*    This program is free software; you can redistribute it and/or modify       *)
(*    it under the terms of the GNU Library General Public License as            *)
(*    published by the Free Software Foundation; either version 2 of the         *)
(*    License, or  any later version.                                            *)
(*                                                                               *)
(*    This program is distributed in the hope that it will be useful,            *)
(*    but WITHOUT ANY WARRANTY; without even the implied warranty of             *)
(*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *)
(*    GNU Library General Public License for more details.                       *)
(*                                                                               *)
(*    You should have received a copy of the GNU Library General Public          *)
(*    License along with this program; if not, write to the Free Software        *)
(*    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA                   *)
(*    02111-1307  USA                                                            *)
(*                                                                               *)
(*    Contact: Maxence.Guesdon@inria.fr                                          *)
(*                                                                               *)
(*********************************************************************************)

type modifier = Gdk.Tags.modifier

type handler = {
    cond : (unit -> bool) ;
    cback : (unit -> unit) ;
  }

type handler_spec = int * int * Gdk.keysym
      (** mods * mask * key *)

let int_of_modifier = function
    `SHIFT -> 1
  | `LOCK -> 2
  | `CONTROL -> 4
  | `MOD1 -> 8
  | `MOD2 -> 16
  | `MOD3 -> 32
  | `MOD4 -> 64
  | `MOD5 -> 128
  | `BUTTON1 -> 256
  | `BUTTON2 -> 512
  | `BUTTON3 -> 1024
  | `BUTTON4 -> 2048
  | `BUTTON5 -> 4096
  | `HYPER -> 1 lsl 22
  | `META -> 1 lsl 20
  | `RELEASE -> 1 lsl 30
  | `SUPER -> 1 lsl 21

let print_modifier l =
  List.iter
    (fun m ->
      print_string
	(((function
	    `SHIFT -> "SHIFT"
	  | `LOCK -> "LOCK"
	  | `CONTROL -> "CONTROL"
	  | `MOD1 -> "MOD1"
	  | `MOD2 -> "MOD2"
	  | `MOD3 -> "MOD3"
	  | `MOD4 -> "MOD4"
	  | `MOD5 -> "MOD5"
	  | `BUTTON1 -> "B1"
	  | `BUTTON2 -> "B2"
	  | `BUTTON3 -> "B3"
	  | `BUTTON4 -> "B4"
	  | `BUTTON5 -> "B5"
          | `HYPER -> "HYPER"                                                                                                     
          | `META -> "META"                                                                                                       
          | `RELEASE -> ""                                                                                                        
          | `SUPER -> "SUPER")
	    m)^" ")
    )
    l;
  print_newline ()

let int_of_modifiers l =
  List.fold_left (fun acc -> fun m -> acc + (int_of_modifier m)) 0 l

module H =
  struct
    type t = handler_spec * handler
    let equal (m,k) (mods, mask, key) =
      (k = key) && ((m land mask) = mods)

    let filter_with_mask mods mask key l =
      List.filter (fun a -> (fst a) <> (mods, mask, key)) l

    let find_handlers mods key l =
      List.map snd
        (List.filter
	   (fun ((m,ma,k),_) -> equal (mods,key) (m,ma,k))
	   l
	)

  end

let (table : (int, H.t list ref) Hashtbl.t) = Hashtbl.create 13

let key_press w ev =
  let key = GdkEvent.Key.keyval ev in
  let modifiers = GdkEvent.Key.state ev in
  try
    let (r : H.t list ref) = Hashtbl.find table (Oo.id w) in
    let l = H.find_handlers (int_of_modifiers modifiers) key !r in
    match l with
      [] -> false
    | _ ->
	List.iter
	  (fun h ->
	    if h.cond () then
	      try h.cback ()
	      with e -> Minilib.log (Printexc.to_string e)
	    else ()
	  )
	  l;
	true
  with
    Not_found ->
      false

let associate_key_press w =
  ignore ((w#event#connect#key_press ~callback: (key_press w)) : GtkSignal.id)

let default_modifiers = ref ([] : modifier list)
let default_mask = ref ([`MOD2 ; `MOD3 ; `MOD4 ; `MOD5 ; `LOCK] : modifier list)

let set_default_modifiers l = default_modifiers := l
let set_default_mask l = default_mask := l

let remove_widget  (w : < event : GObj.event_ops ; ..>) () =
  try
    let r = Hashtbl.find table (Oo.id w) in
    r := []
  with
    Not_found ->
      ()

let add1 ?(remove=false) w
    ?(cond=(fun () -> true))
    ?(mods= !default_modifiers)
    ?(mask= !default_mask)
    k callback =

  let r =
    try Hashtbl.find table (Oo.id w)
    with Not_found ->
      let r = ref [] in
      Hashtbl.add table (Oo.id w) r;
      ignore (w#connect#destroy ~callback: (remove_widget w));
      associate_key_press w;
      r
  in
  let n_mods = int_of_modifiers mods in
  let n_mask = lnot (int_of_modifiers mask) in
  let new_h = { cond = cond ; cback = callback } in
  if remove then
    (
     let l = H.filter_with_mask n_mods n_mask k !r in
     r := ((n_mods, n_mask, k), new_h) :: l
    )
  else
    r := ((n_mods, n_mask, k), new_h) :: !r

let add w
    ?(cond=(fun () -> true))
    ?(mods= !default_modifiers)
    ?(mask= !default_mask)
    k callback =
  add1 w ~cond ~mods ~mask k callback

let add_list w
    ?(cond=(fun () -> true))
    ?(mods= !default_modifiers)
    ?(mask= !default_mask)
    k_list callback =
  List.iter (fun k -> add w ~cond ~mods ~mask k callback) k_list

let set w
    ?(cond=(fun () -> true))
    ?(mods= !default_modifiers)
    ?(mask= !default_mask)
    k callback =
  add1 ~remove: true w ~cond ~mods ~mask k callback

let set_list w
    ?(cond=(fun () -> true))
    ?(mods= !default_modifiers)
    ?(mask= !default_mask)
    k_list callback =
  List.iter (fun k -> set w ~cond ~mods ~mask k callback) k_list