src/learn.c

   1 /*
   2    Learn keys
   3
   4    Copyright (C) 1995, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   5    2007, 2009, 2011
   6    The Free Software Foundation, Inc.
   7
   8    Written by:
   9    Jakub Jelinek, 1995
  10
  11    This file is part of the Midnight Commander.
  12
  13    The Midnight Commander is free software: you can redistribute it
  14    and/or modify it under the terms of the GNU General Public License as
  15    published by the Free Software Foundation, either version 3 of the License,
  16    or (at your option) any later version.
  17
  18    The Midnight Commander is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25  */
  26
  27 /** \file learn.c
  28  *  \brief Source: learn keys module
  29  */
  30
  31 #include <config.h>
  32
  33 #include <ctype.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <unistd.h>
  41
  42 #include "lib/global.h"
  43
  44 #include "lib/tty/tty.h"
  45 #include "lib/tty/key.h"
  46 #include "lib/mcconfig.h"       /* Save profile */
  47 #include "lib/strescape.h"
  48 #include "lib/strutil.h"
  49 #include "lib/util.h"           /* convert_controls() */
  50 #include "lib/widget.h"
  51
  52 #include "src/filemanager/layout.h"     /* mc_refresh()  */
  53
  54 #include "setup.h"
  55 #include "learn.h"
  56
  57 /*** global variables ****************************************************************************/
  58
  59 /*** file scope macro definitions ****************************************************************/
  60
  61 #define UX 4
  62 #define UY 3
  63
  64 #define BY UY + 17
  65
  66 #define ROWS     13
  67 #define COLSHIFT 23
  68
  69 #define BUTTONS 2
  70
  71 /*** file scope type declarations ****************************************************************/
  72
  73 typedef struct
  74 {
  75     Widget *button;
  76     Widget *label;
  77     int ok;
  78     char *sequence;
  79 } learnkey;
  80
  81 /*** file scope variables ************************************************************************/
  82
  83 static struct
  84 {
  85     int ret_cmd, flags, y, x;
  86     const char *text;
  87 } learn_but[BUTTONS] =
  88 {
  89     /* *INDENT-OFF */
  90     {
  91     B_CANCEL, NORMAL_BUTTON, 0, 39, N_("&Cancel")},
  92     {
  93     B_ENTER, DEFPUSH_BUTTON, 0, 25, N_("&Save")}
  94     /* *INDENT-ON */
  95 };
  96
  97 static Dlg_head *learn_dlg;
  98
  99 static learnkey *learnkeys = NULL;
 100 static int learn_total;
 101 static int learnok;
 102 static int learnchanged;
 103 static const char *learn_title = N_("Learn keys");
 104
 105 /*** file scope functions ************************************************************************/
 106 /* --------------------------------------------------------------------------------------------- */
 107
 108 static int
 109 learn_button (WButton * button, int action)
 110 {
 111     Dlg_head *d;
 112     char *seq;
 113
 114     (void) button;
 115
 116     d = create_message (D_ERROR, _("Teach me a key"),
 117                         _("Please press the %s\n"
 118                           "and then wait until this message disappears.\n\n"
 119                           "Then, press it again to see if OK appears\n"
 120                           "next to its button.\n\n"
 121                           "If you want to escape, press a single Escape key\n"
 122                           "and wait as well."), _(key_name_conv_tab[action - B_USER].longname));
 123     mc_refresh ();
 124     if (learnkeys[action - B_USER].sequence != NULL)
 125     {
 126         g_free (learnkeys[action - B_USER].sequence);
 127         learnkeys[action - B_USER].sequence = NULL;
 128     }
 129     seq = learn_key ();
 130
 131     if (seq)
 132     {
 133         /* Esc hides the dialog and do not allow definitions of
 134          * regular characters
 135          */
 136         gboolean seq_ok = FALSE;
 137
 138         if (*seq && strcmp (seq, "\\e") && strcmp (seq, "\\e\\e")
 139             && strcmp (seq, "^m") && strcmp (seq, "^i") && (seq[1] || (*seq < ' ' || *seq > '~')))
 140         {
 141
 142             learnchanged = 1;
 143             learnkeys[action - B_USER].sequence = seq;
 144             seq = convert_controls (seq);
 145             seq_ok = define_sequence (key_name_conv_tab[action - B_USER].code, seq, MCKEY_NOACTION);
 146         }
 147
 148         if (!seq_ok)
 149             message (D_NORMAL, _("Cannot accept this key"), _("You have entered \"%s\""), seq);
 150
 151         g_free (seq);
 152     }
 153
 154     dlg_run_done (d);
 155     destroy_dlg (d);
 156     dlg_select_widget (learnkeys[action - B_USER].button);
 157     return 0;                   /* Do not kill learn_dlg */
 158 }
 159
 160 /* --------------------------------------------------------------------------------------------- */
 161
 162 static int
 163 learn_move (int right)
 164 {
 165     int i, totalcols;
 166
 167     totalcols = (learn_total - 1) / ROWS + 1;
 168     for (i = 0; i < learn_total; i++)
 169         if (learnkeys[i].button == (Widget *) learn_dlg->current->data)
 170         {
 171             if (right)
 172             {
 173                 if (i < learn_total - ROWS)
 174                     i += ROWS;
 175                 else
 176                     i %= ROWS;
 177             }
 178             else
 179             {
 180                 if (i / ROWS)
 181                     i -= ROWS;
 182                 else if (i + (totalcols - 1) * ROWS >= learn_total)
 183                     i += (totalcols - 2) * ROWS;
 184                 else
 185                     i += (totalcols - 1) * ROWS;
 186             }
 187             dlg_select_widget (learnkeys[i].button);
 188             return 1;
 189         }
 190     return 0;
 191 }
 192
 193 /* --------------------------------------------------------------------------------------------- */
 194
 195 static int
 196 learn_check_key (int c)
 197 {
 198     int i;
 199
 200     for (i = 0; i < learn_total; i++)
 201     {
 202         if (key_name_conv_tab[i].code != c || learnkeys[i].ok)
 203             continue;
 204
 205         dlg_select_widget (learnkeys[i].button);
 206         /* TRANSLATORS: This label appears near learned keys.  Keep it short.  */
 207         label_set_text ((WLabel *) learnkeys[i].label, _("OK"));
 208         learnkeys[i].ok = 1;
 209         learnok++;
 210         if (learnok >= learn_total)
 211         {
 212             learn_dlg->ret_value = B_CANCEL;
 213             if (learnchanged)
 214             {
 215                 if (query_dialog (learn_title,
 216                                   _
 217                                   ("It seems that all your keys already\n"
 218                                    "work fine. That's great."), D_ERROR, 2,
 219                                   _("&Save"), _("&Discard")) == 0)
 220                     learn_dlg->ret_value = B_ENTER;
 221             }
 222             else
 223             {
 224                 message (D_ERROR, learn_title,
 225                          _
 226                          ("Great! You have a complete terminal database!\n"
 227                           "All your keys work well."));
 228             }
 229             dlg_stop (learn_dlg);
 230         }
 231         return 1;
 232     }
 233     switch (c)
 234     {
 235     case KEY_LEFT:
 236     case 'h':
 237         return learn_move (0);
 238     case KEY_RIGHT:
 239     case 'l':
 240         return learn_move (1);
 241     case 'j':
 242         dlg_one_down (learn_dlg);
 243         return 1;
 244     case 'k':
 245         dlg_one_up (learn_dlg);
 246         return 1;
 247     }
 248
 249     /* Prevent from disappearing if a non-defined sequence is pressed
 250        and contains a button hotkey.  Only recognize hotkeys with ALT.  */
 251     if (c < 255 && g_ascii_isalnum (c))
 252         return 1;
 253
 254     return 0;
 255 }
 256
 257 /* --------------------------------------------------------------------------------------------- */
 258
 259 static cb_ret_t
 260 learn_callback (Dlg_head * h, Widget * sender, dlg_msg_t msg, int parm, void *data)
 261 {
 262     switch (msg)
 263     {
 264     case DLG_DRAW:
 265         common_dialog_repaint (h);
 266         return MSG_HANDLED;
 267
 268     case DLG_KEY:
 269         return learn_check_key (parm);
 270
 271     default:
 272         return default_dlg_callback (h, sender, msg, parm, data);
 273     }
 274 }
 275
 276 /* --------------------------------------------------------------------------------------------- */
 277
 278 static void
 279 init_learn (void)
 280 {
 281     int x, y, i, j;
 282     const key_code_name_t *key;
 283     char buffer[BUF_TINY];
 284
 285 #ifdef ENABLE_NLS
 286     static int i18n_flag = 0;
 287     if (!i18n_flag)
 288     {
 289         learn_but[0].text = _(learn_but[0].text);
 290         learn_but[0].x = 78 / 2 + 4;
 291
 292         learn_but[1].text = _(learn_but[1].text);
 293         learn_but[1].x = 78 / 2 - (str_term_width1 (learn_but[1].text) + 9);
 294
 295         learn_title = _(learn_title);
 296         i18n_flag = 1;
 297     }
 298 #endif /* ENABLE_NLS */
 299
 300     do_refresh ();
 301
 302     learn_dlg =
 303         create_dlg (TRUE, 0, 0, 23, 78, dialog_colors, learn_callback,
 304                     "[Learn keys]", learn_title, DLG_CENTER | DLG_REVERSE);
 305
 306     for (i = 0; i < BUTTONS; i++)
 307         add_widget (learn_dlg,
 308                     button_new (BY + learn_but[i].y, learn_but[i].x,
 309                                 learn_but[i].ret_cmd, learn_but[i].flags, _(learn_but[i].text), 0));
 310
 311     x = UX;
 312     y = UY;
 313     for (key = key_name_conv_tab, j = 0;
 314          key->name != NULL && strcmp (key->name, "kpleft"); key++, j++)
 315         ;
 316     learnkeys = g_new (learnkey, j);
 317     x += ((j - 1) / ROWS) * COLSHIFT;
 318     y += (j - 1) % ROWS;
 319     learn_total = j;
 320     learnok = 0;
 321     learnchanged = 0;
 322     for (i = j - 1, key = key_name_conv_tab + j - 1; i >= 0; i--, key--)
 323     {
 324         learnkeys[i].ok = 0;
 325         learnkeys[i].sequence = NULL;
 326         g_snprintf (buffer, sizeof (buffer), "%-16s", _(key->longname));
 327         add_widget (learn_dlg, learnkeys[i].button = (Widget *)
 328                     button_new (y, x, B_USER + i, NARROW_BUTTON, buffer, learn_button));
 329         add_widget (learn_dlg, learnkeys[i].label = (Widget *) label_new (y, x + 19, ""));
 330         if (i % 13)
 331             y--;
 332         else
 333         {
 334             x -= COLSHIFT;
 335             y = UY + ROWS - 1;
 336         }
 337     }
 338     add_widget (learn_dlg,
 339                 label_new (UY + 14, 5,
 340                            _("Press all the keys mentioned here. After you have done it, check")));
 341     add_widget (learn_dlg,
 342                 label_new (UY + 15, 5,
 343                            _("which keys are not marked with OK.  Press space on the missing")));
 344     add_widget (learn_dlg,
 345                 label_new (UY + 16, 5,
 346                            _("key, or click with the mouse to define it. Move around with Tab.")));
 347 }
 348
 349 /* --------------------------------------------------------------------------------------------- */
 350
 351 static void
 352 learn_done (void)
 353 {
 354     destroy_dlg (learn_dlg);
 355     repaint_screen ();
 356 }
 357
 358 /* --------------------------------------------------------------------------------------------- */
 359
 360 static void
 361 learn_save (void)
 362 {
 363     int i;
 364     int profile_changed = 0;
 365     char *section = g_strconcat ("terminal:", getenv ("TERM"), (char *) NULL);
 366     char *esc_str;
 367
 368     for (i = 0; i < learn_total; i++)
 369     {
 370         if (learnkeys[i].sequence != NULL)
 371         {
 372             profile_changed = 1;
 373
 374             esc_str = strutils_escape (learnkeys[i].sequence, -1, ";\\", TRUE);
 375
 376             mc_config_set_string_raw_value (mc_main_config, section, key_name_conv_tab[i].name,
 377                                             esc_str);
 378
 379             g_free (esc_str);
 380         }
 381     }
 382
 383     /* On the one hand no good idea to save the complete setup but
 384      * without 'Auto save setup' the new key-definitions will not be
 385      * saved unless the user does an 'Options/Save Setup'.
 386      * On the other hand a save-button that does not save anything to
 387      * disk is much worse.
 388      */
 389     if (profile_changed)
 390         mc_config_save_file (mc_main_config, NULL);
 391
 392     g_free (section);
 393 }
 394
 395 /* --------------------------------------------------------------------------------------------- */
 396 /*** public functions ****************************************************************************/
 397 /* --------------------------------------------------------------------------------------------- */
 398
 399 void
 400 learn_keys (void)
 401 {
 402     int save_old_esc_mode = old_esc_mode;
 403     gboolean save_alternate_plus_minus = mc_global.tty.alternate_plus_minus;
 404
 405     /* old_esc_mode cannot work in learn keys dialog */
 406     old_esc_mode = 0;
 407
 408     /* don't translate KP_ADD, KP_SUBTRACT and
 409        KP_MULTIPLY to '+', '-' and '*' in
 410        correct_key_code */
 411     mc_global.tty.alternate_plus_minus = TRUE;
 412     application_keypad_mode ();
 413     init_learn ();
 414
 415     run_dlg (learn_dlg);
 416
 417     old_esc_mode = save_old_esc_mode;
 418     mc_global.tty.alternate_plus_minus = save_alternate_plus_minus;
 419
 420     if (!mc_global.tty.alternate_plus_minus)
 421         numeric_keypad_mode ();
 422
 423     switch (learn_dlg->ret_value)
 424     {
 425     case B_ENTER:
 426         learn_save ();
 427         break;
 428     }
 429
 430     learn_done ();
 431 }
 432
 433 /* --------------------------------------------------------------------------------------------- */