apps/plugins/text_editor.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 Jonathan Gordon
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include "plugin.h"
  22 #include "lib/playback_control.h"
  23
  24 #if PLUGIN_BUFFER_SIZE > 0x45000
  25 #define MAX_CHARS    0x40000 /* 256 kiB */
  26 #else
  27 #define MAX_CHARS   0x5FE0 /* a bit less than 24 kiB */
  28 #endif
  29 #define MAX_LINE_LEN 2048
  30 PLUGIN_HEADER
  31
  32 static char buffer[MAX_CHARS];
  33 static char eol[3];
  34 static int char_count = 0;
  35 static int line_count = 0;
  36 static int last_action_line = 0;
  37 static int last_char_index = 0;
  38
  39 #define ACTION_INSERT 0
  40 #define ACTION_GET    1
  41 #define ACTION_REMOVE 2
  42 #define ACTION_UPDATE 3
  43 #define ACTION_CONCAT 4
  44
  45 int _do_action(int action, char* str, int line);
  46 #ifndef HAVE_ADJUSTABLE_CPU_FREQ
  47 #define do_action _do_action
  48 #else
  49 int do_action(int action, char* str, int line)
  50 {
  51     int r;
  52     rb->cpu_boost(1);
  53     r = _do_action(action,str,line);
  54     rb->cpu_boost(0);
  55     return r;
  56 }
  57 #endif
  58
  59 int _do_action(int action, char* str, int line)
  60 {
  61     int len, lennew;
  62     int i=0,c=0;
  63     if (line>=last_action_line)
  64     {
  65         i = last_action_line;
  66         c = last_char_index;
  67     }
  68     while (i<line && i<line_count)
  69     {
  70         c += rb->strlen(&buffer[c])+1;
  71         i++;
  72     }
  73     switch (action)
  74     {
  75         case ACTION_INSERT:
  76             len = rb->strlen(str)+1;
  77             if ( char_count+ len > MAX_CHARS )
  78                 return 0;
  79             rb->memmove(&buffer[c+len],&buffer[c],char_count-c);
  80             rb->strcpy(&buffer[c],str);
  81             char_count += len;
  82             line_count++;
  83             break;
  84         case ACTION_GET:
  85             if (line > line_count)
  86                 return 0;
  87             last_action_line = i;
  88             last_char_index = c;
  89             return c;
  90             break;
  91         case ACTION_REMOVE:
  92             if (line > line_count)
  93                 return 0;
  94             len = rb->strlen(&buffer[c])+1;
  95             rb->memmove(&buffer[c],&buffer[c+len],char_count-c-len);
  96             char_count -= len;
  97             line_count--;
  98             break;
  99         case ACTION_UPDATE:
 100             if (line > line_count)
 101                 return 0;
 102             len = rb->strlen(&buffer[c])+1;
 103             lennew = rb->strlen(str)+1;
 104             if ( char_count+ lennew-len > MAX_CHARS )
 105                 return 0;
 106             rb->memmove(&buffer[c+lennew],&buffer[c+len],char_count-c-len);
 107             rb->strcpy(&buffer[c],str);
 108             char_count += lennew-len;
 109             break;
 110         case ACTION_CONCAT:
 111             if (line > line_count)
 112                 return 0;
 113             rb->memmove(&buffer[c-1],&buffer[c],char_count-c);
 114             char_count--;
 115             line_count--;
 116             break;
 117         default:
 118             return 0;
 119     }
 120     last_action_line = i;
 121     last_char_index = c;
 122     return 1;
 123 }
 124 char *list_get_name_cb(int selected_item, void* data,
 125                        char* buf, size_t buf_len)
 126 {
 127     (void)data;
 128     char *b = &buffer[do_action(ACTION_GET,0,selected_item)];
 129     if (rb->strlen(b) >= buf_len)
 130     {
 131         char t = b[buf_len-10];
 132         b[buf_len-10] = '\0';
 133         rb->snprintf(buf , buf_len, "%s ...", b);
 134         b[buf_len-10] = t;
 135     }
 136     else rb->strlcpy(buf, b, buf_len);
 137     return buf;
 138 }
 139
 140 char filename[MAX_PATH];
 141 bool newfile;
 142 int get_eol_string(char* fn)
 143 {
 144     int fd, result;
 145     char t;
 146
 147     if (!fn || !fn[0])
 148         return 0;
 149     fd = rb->open(fn,O_RDONLY);
 150     if (fd<0)
 151         return 0;
 152
 153     eol[0] = '\0';
 154     result = 1;
 155     while (!eol[0])
 156     {
 157         if (!rb->read(fd,&t,1))
 158         {
 159             rb->strcpy(eol,"\n");
 160             result = 0;
 161         }
 162         if (t == '\r')
 163         {
 164             if (rb->read(fd,&t,1) && t=='\n')
 165                 rb->strcpy(eol,"\r\n");
 166             else
 167                 rb->strcpy(eol,"\r");
 168         }
 169         else if (t == '\n')
 170         {
 171             rb->strcpy(eol,"\n");
 172         }
 173     }
 174     rb->close(fd);
 175     return result;
 176 }
 177
 178 bool save_changes(int overwrite)
 179 {
 180     int fd;
 181     int i;
 182
 183     if (newfile || !overwrite)
 184     {
 185         if(rb->kbd_input(filename,MAX_PATH) < 0)
 186         {
 187             newfile = true;
 188             return false;
 189         }
 190     }
 191
 192     fd = rb->open(filename,O_WRONLY|O_CREAT|O_TRUNC);
 193     if (fd < 0)
 194     {
 195         newfile = true;
 196         rb->splash(HZ*2, "Changes NOT saved");
 197         return false;
 198     }
 199
 200     if (!overwrite)
 201         /* current directory may have changed */
 202         rb->reload_directory();
 203
 204     rb->lcd_clear_display();
 205 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 206     rb->cpu_boost(1);
 207 #endif
 208     for (i=0;i<line_count;i++)
 209     {
 210         rb->fdprintf(fd,"%s%s",&buffer[do_action(ACTION_GET,0,i)],eol);
 211     }
 212 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 213     rb->cpu_boost(0);
 214 #endif
 215     rb->close(fd);
 216     newfile = false;
 217     return true;
 218 }
 219
 220 void setup_lists(struct gui_synclist *lists, int sel)
 221 {
 222     rb->gui_synclist_init(lists,list_get_name_cb,0, false, 1, NULL);
 223     rb->gui_synclist_set_icon_callback(lists,NULL);
 224     rb->gui_synclist_set_nb_items(lists,line_count);
 225     rb->gui_synclist_limit_scroll(lists,true);
 226     rb->gui_synclist_select_item(lists, sel);
 227     rb->gui_synclist_draw(lists);
 228 }
 229 enum {
 230     MENU_RET_SAVE = -1,
 231     MENU_RET_NO_UPDATE,
 232     MENU_RET_UPDATE,
 233 };
 234 int do_item_menu(int cur_sel, char* copy_buffer)
 235 {
 236     int ret = 0;
 237     MENUITEM_STRINGLIST(menu, "Line Options", NULL,
 238                         "Cut/Delete", "Copy",
 239                         "Insert Above", "Insert Below",
 240                         "Concat To Above", "Save",
 241                         "Show Playback Menu",);
 242
 243     switch (rb->do_menu(&menu, NULL, NULL, false))
 244     {
 245         case 0: /* cut */
 246             rb->strcpy(copy_buffer,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 247             do_action(ACTION_REMOVE,0,cur_sel);
 248             ret = MENU_RET_UPDATE;
 249         break;
 250         case 1: /* copy */
 251             rb->strcpy(copy_buffer,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 252             ret = MENU_RET_NO_UPDATE;
 253         break;
 254         case 2: /* insert above */
 255             if (!rb->kbd_input(copy_buffer,MAX_LINE_LEN))
 256             {
 257                 do_action(ACTION_INSERT,copy_buffer,cur_sel);
 258                 copy_buffer[0]='\0';
 259                 ret = MENU_RET_UPDATE;
 260             }
 261         break;
 262         case 3: /* insert below */
 263             if (!rb->kbd_input(copy_buffer,MAX_LINE_LEN))
 264             {
 265                 do_action(ACTION_INSERT,copy_buffer,cur_sel+1);
 266                 copy_buffer[0]='\0';
 267                 ret = MENU_RET_UPDATE;
 268             }
 269         break;
 270         case 4: /* cat to above */
 271             if (cur_sel>0)
 272             {
 273                 do_action(ACTION_CONCAT,0,cur_sel);
 274                 ret = MENU_RET_UPDATE;
 275             }
 276         break;
 277         case 5: /* save */
 278             ret = MENU_RET_SAVE;
 279         break;
 280         case 6: /* playback menu */
 281             playback_control(NULL);
 282             ret = MENU_RET_NO_UPDATE;
 283         break;
 284         default:
 285             ret = MENU_RET_NO_UPDATE;
 286         break;
 287     }
 288     return ret;
 289 }
 290
 291 #ifdef HAVE_LCD_COLOR
 292 /* in misc.h but no need to polute the api */
 293 #define toupper(c) (((c >= 'a') && (c <= 'z'))?c+'A':c)
 294 #define isxdigit(c) ((c>='a' && c<= 'f') || (c>='A' && c<= 'F') \
 295                     || (c>='0' && c<= '9'))
 296 #define hex2dec(c) (((c) >= '0' && ((c) <= '9')) ? (toupper(c)) - '0' : \
 297                                                    (toupper(c)) - 'A' + 10)
 298 int hex_to_rgb(const char* hex, int* color)
 299 {   int ok = 1;
 300     int i;
 301     int red, green, blue;
 302
 303     if (rb->strlen(hex) == 6) {
 304         for (i=0; i < 6; i++ ) {
 305             if (!isxdigit(hex[i])) {
 306                 ok=0;
 307                 break;
 308             }
 309         }
 310
 311         if (ok) {
 312             red = (hex2dec(hex[0]) << 4) | hex2dec(hex[1]);
 313             green = (hex2dec(hex[2]) << 4) | hex2dec(hex[3]);
 314             blue = (hex2dec(hex[4]) << 4) | hex2dec(hex[5]);
 315             *color = LCD_RGBPACK(red,green,blue);
 316             return 0;
 317         }
 318     }
 319
 320     return -1;
 321 }
 322 #endif /* HAVE_LCD_COLOR */
 323
 324 /* this is the plugin entry point */
 325 enum plugin_status plugin_start(const void* parameter)
 326 {
 327     int fd;
 328     static char temp_line[MAX_LINE_LEN];
 329
 330     struct gui_synclist lists;
 331     bool exit = false;
 332     int button;
 333     bool changed = false;
 334     int cur_sel=0;
 335     static char copy_buffer[MAX_LINE_LEN];
 336 #ifdef HAVE_LCD_COLOR
 337     bool edit_colors_file = false;
 338 #endif
 339
 340     copy_buffer[0]='\0';
 341
 342 #if LCD_DEPTH > 1
 343     rb->lcd_set_backdrop(NULL);
 344 #endif
 345
 346 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 347     rb->cpu_boost(1);
 348 #endif
 349     if (parameter)
 350     {
 351 #ifdef HAVE_LCD_COLOR
 352         char *c = NULL;
 353 #endif
 354         rb->strcpy(filename,(char*)parameter);
 355         if (!get_eol_string(filename))
 356         {
 357             rb->strcpy(eol,"\n");
 358         }
 359         fd = rb->open(filename,O_RDONLY);
 360         if (fd<0)
 361         {
 362             rb->splashf(HZ*2,"Couldnt open file: %s",(char*)parameter);
 363             return PLUGIN_ERROR;
 364         }
 365 #ifdef HAVE_LCD_COLOR
 366         c = rb->strrchr(filename, '.');
 367         if (c && !rb->strcmp(c, ".colours"))
 368             edit_colors_file = true;
 369 #endif
 370         /* read in the file */
 371         while (rb->read_line(fd,temp_line,MAX_LINE_LEN))
 372         {
 373             if (!do_action(ACTION_INSERT,temp_line,line_count))
 374             {
 375                 rb->splashf(HZ*2,"Error reading file: %s",(char*)parameter);
 376                 rb->close(fd);
 377                 return PLUGIN_ERROR;
 378             }
 379         }
 380         rb->close(fd);
 381         newfile = false;
 382     }
 383     else
 384     {
 385         rb->strcpy(filename,"/");
 386         rb->strcpy(eol,"\n");
 387         newfile = true;
 388     }
 389 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 390     rb->cpu_boost(0);
 391 #endif
 392     /* now dump it in the list */
 393     setup_lists(&lists,0);
 394     rb->lcd_update();
 395     while (!exit)
 396     {
 397         rb->gui_synclist_draw(&lists);
 398         cur_sel = rb->gui_synclist_get_sel_pos(&lists);
 399         button = rb->get_action(CONTEXT_LIST,TIMEOUT_BLOCK);
 400         if (rb->gui_synclist_do_button(&lists,&button,LIST_WRAP_UNLESS_HELD))
 401             continue;
 402         switch (button)
 403         {
 404             case ACTION_STD_OK:
 405             {
 406                 if (line_count)
 407                     rb->strcpy(temp_line,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 408 #ifdef HAVE_LCD_COLOR
 409                 if (edit_colors_file && line_count)
 410                 {
 411                     char *name = temp_line, *value = NULL;
 412                     char extension[MAX_LINE_LEN];
 413                     int color, old_color;
 414                     bool temp_changed;
 415                     rb->settings_parseline(temp_line, &name, &value);
 416                     if (line_count)
 417                     {
 418                         MENUITEM_STRINGLIST(menu, "Edit What?", NULL,
 419                                             "Extension", "Colour",);
 420                         rb->strcpy(extension, name);
 421                         if (value)
 422                             hex_to_rgb(value, &color);
 423                         else
 424                             color = 0;
 425
 426                         switch (rb->do_menu(&menu, NULL, NULL, false))
 427                         {
 428                             case 0:
 429                                 temp_changed = !rb->kbd_input(extension,MAX_LINE_LEN);
 430                                 break;
 431                             case 1:
 432                                 old_color = color;
 433                                 rb->set_color(rb->screens[SCREEN_MAIN], name, &color, -1);
 434                                 temp_changed = (value == NULL) || (color != old_color);
 435                                 break;
 436                             default:
 437                                 /* Should never happen but makes compiler happy */
 438                                 temp_changed = false;
 439                         }
 440
 441                         if (temp_changed)
 442                         {
 443                             rb->snprintf(temp_line, MAX_LINE_LEN, "%s: %02X%02X%02X",
 444                                          extension, RGB_UNPACK_RED(color),
 445                                          RGB_UNPACK_GREEN(color),
 446                                          RGB_UNPACK_BLUE(color));
 447                             do_action(ACTION_UPDATE, temp_line, cur_sel);
 448                             changed = true;
 449                         }
 450                     }
 451                 }
 452                 else
 453 #endif
 454                 if (!rb->kbd_input(temp_line,MAX_LINE_LEN))
 455                 {
 456                     if (line_count)
 457                         do_action(ACTION_UPDATE,temp_line,cur_sel);
 458                     else
 459                         do_action(ACTION_INSERT,temp_line,cur_sel);
 460                     changed = true;
 461                 }
 462             }
 463             break;
 464             case ACTION_STD_CONTEXT:
 465                 if (!line_count) break;
 466                 rb->strcpy(copy_buffer,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 467                 do_action(ACTION_REMOVE,0,cur_sel);
 468                 changed = true;
 469             break;
 470             case ACTION_STD_MENU:
 471             { /* do the item menu */
 472                 switch (do_item_menu(cur_sel, copy_buffer))
 473                 {
 474                     case MENU_RET_SAVE:
 475                         if(save_changes(1))
 476                             changed = false;
 477                     break;
 478                     case MENU_RET_UPDATE:
 479                         changed = true;
 480                     break;
 481                     case MENU_RET_NO_UPDATE:
 482                     break;
 483                 }
 484             }
 485             break;
 486             case ACTION_STD_CANCEL:
 487                 if (changed)
 488                 {
 489                     MENUITEM_STRINGLIST(menu, "Do What?", NULL,
 490                                         "Return",
 491                                         "Show Playback Menu", "Save Changes",
 492                                         "Save As...", "Save and Exit",
 493                                         "Ignore Changes and Exit");
 494                     switch (rb->do_menu(&menu, NULL, NULL, false))
 495                     {
 496                         case 0:
 497                         break;
 498                         case 1:
 499                             playback_control(NULL);
 500                         break;
 501                         case 2: //save to disk
 502                             if(save_changes(1))
 503                                 changed = 0;
 504                         break;
 505                         case 3:
 506                             if(save_changes(0))
 507                                 changed = 0;
 508                         break;
 509
 510                         case 4:
 511                             if(save_changes(1))
 512                                 exit=1;
 513                         break;
 514                         case 5:
 515                             exit=1;
 516                         break;
 517                     }
 518                 }
 519                 else exit=1;
 520             break;
 521         }
 522         rb->gui_synclist_set_nb_items(&lists,line_count);
 523         if(line_count > 0 && line_count <= cur_sel)
 524             rb->gui_synclist_select_item(&lists,line_count-1);
 525     }
 526     return PLUGIN_OK;
 527 }