1 (* Copyright (C) 2004, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
30 (* let default_prompt = "# " *)
31 let default_prompt = ""
32 let default_phrase_sep = "."
33 let default_callback = fun (phrase: string) -> true
35 let message_props = [ `STYLE `ITALIC ]
36 let error_props = [ `WEIGHT `BOLD ]
37 let prompt_props = [ ]
39 let trailing_NL_RE = Pcre.regexp "\n\\s*$"
41 exception History_failure
43 (** shell like phrase history *)
45 let size = size + 1 in
46 let decr x = let x' = x - 1 in if x' < 0 then size + x' else x' in
47 let incr x = (x + 1) mod size in
49 val data = Array.create size ""
50 val mutable hd = 0 (* insertion point *)
51 val mutable tl = -1 (* oldest inserted item *)
52 val mutable cur = -1 (* current item for the history *)
55 if tl = -1 then tl <- hd;
57 if hd = tl then tl <- incr tl;
60 if cur = tl then raise History_failure;
64 if cur = hd then raise History_failure;
66 if cur = hd then "" else data.(cur)
70 ?(prompt = default_prompt) ?(phrase_sep = default_phrase_sep)
71 ?(callback = default_callback) ?evbox ~(paned:GPack.paned) obj
74 inherit GText.view obj
76 val mutable _phrase_sep = phrase_sep
77 method phrase_sep = _phrase_sep
78 method set_phrase_sep sep = _phrase_sep <- sep
80 val mutable _prompt = prompt
81 method prompt = _prompt
82 method set_prompt prompt = _prompt <- prompt
84 val mutable _callback = callback
85 method set_callback f = _callback <- f
87 val mutable _ignore_insert_text_signal = false
88 method ignore_insert_text_signal ignore =
89 _ignore_insert_text_signal <- ignore
91 val history = new history BuildTimeConf.console_history_size
93 val mutable handle_position = 450
96 let buf = self#buffer in
97 self#set_wrap_mode `CHAR;
99 (* create "USER_INPUT_START" mark. This mark will always point to the
100 * beginning of user input not yet processed *)
101 ignore (buf#create_mark ~name:"USER_INPUT_START"
102 ~left_gravity:true buf#start_iter);
103 ignore (buf#connect#after#insert_text (fun iter text ->
104 if (not _ignore_insert_text_signal) &&
105 (iter#compare buf#end_iter = 0) && (* insertion at end *)
106 (Pcre.pmatch ~rex:trailing_NL_RE text)
110 ~start:(buf#get_iter_at_mark (`NAME "USER_INPUT_START"))
111 ~stop:buf#end_iter ()
113 let pat = (Pcre.quote _phrase_sep) ^ "\\s*$" in
114 if Pcre.pmatch ~pat inserted_text then begin (* complete phrase *)
116 self#invoke_callback inserted_text;
119 (match evbox with (* history key bindings *)
122 List.iter (fun (key, f) -> MatitaGtkMisc.add_key_binding key f evbox)
123 [ GdkKeysyms._p, (fun () -> self#previous_phrase);
124 GdkKeysyms._n, (fun () -> self#next_phrase);
126 ignore (self#connect#after#move_cursor
127 (* avoid cursor being placed at prompt's left *)
128 ~callback:(fun step count ~extend ->
129 let buf = self#buffer in
130 let cursor_iter = buf#get_iter_at_mark `INSERT in
131 let prompt_iter = buf#get_iter_at_mark (`NAME "USER_INPUT_START") in
132 if prompt_iter#compare cursor_iter = 1 then (* prompt > cursor *)
133 buf#place_cursor ~where:prompt_iter))
135 method private set_phrase phrase =
136 let buf = self#buffer in
138 ~start:(buf#get_iter_at_mark (`NAME "USER_INPUT_START"))
140 buf#insert ~iter:buf#end_iter phrase
142 method private invoke_callback phrase =
143 history#add (* do not push trailing phrase separator *)
145 (String.length phrase - String.length _phrase_sep));
146 if _callback phrase then
148 (* else callback encountered troubles, don't hide console which
149 probably contains error message *)
152 let buf = self#buffer in
153 buf#delete ~start:buf#start_iter ~stop:buf#end_iter
155 (* lock old text and bump USER_INPUT_START mark *)
156 method private lock =
157 let buf = self#buffer in
158 let read_only = buf#create_tag [`EDITABLE false] in
159 buf#apply_tag read_only ~start:buf#start_iter ~stop:buf#end_iter;
160 buf#move_mark (`NAME "USER_INPUT_START") buf#end_iter
162 method echo_prompt () =
163 let buf = self#buffer in
164 self#ignore_insert_text_signal true;
165 buf#insert ~iter:buf#end_iter ~tags:[buf#create_tag prompt_props] prompt;
166 self#ignore_insert_text_signal false;
169 method echo_message msg =
170 let buf = self#buffer in
171 self#ignore_insert_text_signal true;
172 buf#insert ~iter:buf#end_iter ~tags:[buf#create_tag message_props]
174 self#ignore_insert_text_signal false;
177 method echo_error msg =
179 let buf = self#buffer in
180 self#ignore_insert_text_signal true;
181 buf#insert ~iter:buf#end_iter ~tags:[buf#create_tag error_props]
183 self#ignore_insert_text_signal false;
186 method show ?(msg = "") () =
187 self#buffer#insert msg;
188 paned#set_position handle_position;
189 self#misc#grab_focus ()
192 paned#set_position max_int
194 (** navigation methods: history, cursor motion, ... *)
196 method private previous_phrase =
197 try self#set_phrase history#previous with History_failure -> ()
198 method private next_phrase =
199 try self#set_phrase history#next with History_failure -> ()
205 self#echo_error (sprintf "Uncaught exception: %s"
206 (Printexc.to_string exn))
211 ?(prompt = default_prompt) ?(phrase_sep = default_phrase_sep)
212 ?(callback = default_callback) ?evbox ~paned
213 ?buffer ?editable ?cursor_visible ?justification ?wrap_mode ?border_width
214 ?width ?height ?packing ?show ()
218 ?buffer ?editable ?cursor_visible ?justification ?wrap_mode ?border_width
219 ?width ?height ?packing ?show ()
221 new console ~prompt ~phrase_sep ~callback ?evbox ~paned view#as_view