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   0x6000 /* 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->strncpy(buf, b, buf_len);
 137     return buf;
 138 }
 139
 140 char filename[MAX_PATH];
 141 int get_eol_string(char* fn)
 142 {
 143     int fd, result;
 144     char t;
 145
 146     if (!fn || !fn[0])
 147         return 0;
 148     fd = rb->open(fn,O_RDONLY);
 149     if (fd<0)
 150         return 0;
 151
 152     eol[0] = '\0';
 153     result = 1;
 154     while (!eol[0])
 155     {
 156         if (!rb->read(fd,&t,1))
 157         {
 158             rb->strcpy(eol,"\n");
 159             result = 0;
 160         }
 161         if (t == '\r')
 162         {
 163             if (rb->read(fd,&t,1) && t=='\n')
 164                 rb->strcpy(eol,"\r\n");
 165             else
 166                 rb->strcpy(eol,"\r");
 167         }
 168         else if (t == '\n')
 169         {
 170             rb->strcpy(eol,"\n");
 171         }
 172     }
 173     rb->close(fd);
 174     return result;
 175 }
 176
 177 void save_changes(int overwrite)
 178 {
 179     int fd;
 180     int i;
 181
 182     if (!filename[0] || !overwrite)
 183     {
 184         rb->strcpy(filename,"/");
 185         rb->kbd_input(filename,MAX_PATH);
 186     }
 187
 188     fd = rb->open(filename,O_WRONLY|O_CREAT|O_TRUNC);
 189     if (fd < 0)
 190     {
 191         rb->splash(HZ*2, "Changes NOT saved");
 192         return;
 193     }
 194
 195     if (!overwrite)
 196         /* current directory may have changed */
 197         rb->reload_directory();
 198
 199     rb->lcd_clear_display();
 200 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 201     rb->cpu_boost(1);
 202 #endif
 203     for (i=0;i<line_count;i++)
 204     {
 205         rb->fdprintf(fd,"%s%s",&buffer[do_action(ACTION_GET,0,i)],eol);
 206     }
 207 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 208     rb->cpu_boost(0);
 209 #endif
 210     rb->close(fd);
 211 }
 212
 213 void setup_lists(struct gui_synclist *lists, int sel)
 214 {
 215     rb->gui_synclist_init(lists,list_get_name_cb,0, false, 1, NULL);
 216     rb->gui_synclist_set_icon_callback(lists,NULL);
 217     rb->gui_synclist_set_nb_items(lists,line_count);
 218     rb->gui_synclist_limit_scroll(lists,true);
 219     rb->gui_synclist_select_item(lists, sel);
 220     rb->gui_synclist_draw(lists);
 221 }
 222 enum {
 223     MENU_RET_SAVE = -1,
 224     MENU_RET_NO_UPDATE,
 225     MENU_RET_UPDATE,
 226 };
 227 int do_item_menu(int cur_sel, char* copy_buffer)
 228 {
 229     int ret = 0;
 230     MENUITEM_STRINGLIST(menu, "Line Options", NULL,
 231                         "Cut/Delete", "Copy",
 232                         "Insert Above", "Insert Below",
 233                         "Concat To Above", "Save",
 234                         "Show Playback Menu",);
 235
 236     switch (rb->do_menu(&menu, NULL, NULL, false))
 237     {
 238         case 0: /* cut */
 239             rb->strcpy(copy_buffer,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 240             do_action(ACTION_REMOVE,0,cur_sel);
 241             ret = MENU_RET_UPDATE;
 242         break;
 243         case 1: /* copy */
 244             rb->strcpy(copy_buffer,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 245             ret = MENU_RET_NO_UPDATE;
 246         break;
 247         case 2: /* insert above */
 248             if (!rb->kbd_input(copy_buffer,MAX_LINE_LEN))
 249             {
 250                 do_action(ACTION_INSERT,copy_buffer,cur_sel);
 251                 copy_buffer[0]='\0';
 252                 ret = MENU_RET_UPDATE;
 253             }
 254         break;
 255         case 3: /* insert below */
 256             if (!rb->kbd_input(copy_buffer,MAX_LINE_LEN))
 257             {
 258                 do_action(ACTION_INSERT,copy_buffer,cur_sel+1);
 259                 copy_buffer[0]='\0';
 260                 ret = MENU_RET_UPDATE;
 261             }
 262         break;
 263         case 4: /* cat to above */
 264             if (cur_sel>0)
 265             {
 266                 do_action(ACTION_CONCAT,0,cur_sel);
 267                 ret = MENU_RET_UPDATE;
 268             }
 269         break;
 270         case 5: /* save */
 271             ret = MENU_RET_SAVE;
 272         break;
 273         case 6: /* playback menu */
 274             playback_control(NULL);
 275             ret = MENU_RET_NO_UPDATE;
 276         break;
 277         default:
 278             ret = MENU_RET_NO_UPDATE;
 279         break;
 280     }
 281     return ret;
 282 }
 283
 284 #ifdef HAVE_LCD_COLOR
 285 /* in misc.h but no need to polute the api */
 286 #define toupper(c) (((c >= 'a') && (c <= 'z'))?c+'A':c)
 287 #define isxdigit(c) ((c>='a' && c<= 'f') || (c>='A' && c<= 'F') \
 288                     || (c>='0' && c<= '9'))
 289 #define hex2dec(c) (((c) >= '0' && ((c) <= '9')) ? (toupper(c)) - '0' : \
 290                                                    (toupper(c)) - 'A' + 10)
 291 int hex_to_rgb(const char* hex, int* color)
 292 {   int ok = 1;
 293     int i;
 294     int red, green, blue;
 295
 296     if (rb->strlen(hex) == 6) {
 297         for (i=0; i < 6; i++ ) {
 298             if (!isxdigit(hex[i])) {
 299                 ok=0;
 300                 break;
 301             }
 302         }
 303
 304         if (ok) {
 305             red = (hex2dec(hex[0]) << 4) | hex2dec(hex[1]);
 306             green = (hex2dec(hex[2]) << 4) | hex2dec(hex[3]);
 307             blue = (hex2dec(hex[4]) << 4) | hex2dec(hex[5]);
 308             *color = LCD_RGBPACK(red,green,blue);
 309             return 0;
 310         }
 311     }
 312
 313     return -1;
 314 }
 315 #endif /* HAVE_LCD_COLOR */
 316
 317 /* this is the plugin entry point */
 318 enum plugin_status plugin_start(const void* parameter)
 319 {
 320     int fd;
 321     static char temp_line[MAX_LINE_LEN];
 322
 323     struct gui_synclist lists;
 324     bool exit = false;
 325     int button;
 326     bool changed = false;
 327     int cur_sel=0;
 328     static char copy_buffer[MAX_LINE_LEN];
 329     bool prev_show_statusbar;
 330 #ifdef HAVE_LCD_COLOR
 331     bool edit_colors_file = false;
 332 #endif
 333
 334     copy_buffer[0]='\0';
 335     prev_show_statusbar = rb->global_settings->statusbar;
 336     rb->global_settings->statusbar = false;
 337
 338 #if LCD_DEPTH > 1
 339     rb->lcd_set_backdrop(NULL);
 340 #endif
 341
 342 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 343     rb->cpu_boost(1);
 344 #endif
 345     if (parameter)
 346     {
 347 #ifdef HAVE_LCD_COLOR
 348         char *c = NULL;
 349 #endif
 350         rb->strcpy(filename,(char*)parameter);
 351         if (!get_eol_string(filename))
 352         {
 353             rb->strcpy(eol,"\n");
 354         }
 355         fd = rb->open(filename,O_RDONLY);
 356         if (fd<0)
 357         {
 358             rb->splashf(HZ*2,"Couldnt open file: %s",(char*)parameter);
 359             return PLUGIN_ERROR;
 360         }
 361 #ifdef HAVE_LCD_COLOR
 362         c = rb->strrchr(filename, '.');
 363         if (c && !rb->strcmp(c, ".colours"))
 364             edit_colors_file = true;
 365 #endif
 366         /* read in the file */
 367         while (rb->read_line(fd,temp_line,MAX_LINE_LEN))
 368         {
 369             if (!do_action(ACTION_INSERT,temp_line,line_count))
 370             {
 371                 rb->splashf(HZ*2,"Error reading file: %s",(char*)parameter);
 372                 rb->close(fd);
 373                 return PLUGIN_ERROR;
 374             }
 375         }
 376         rb->close(fd);
 377     }
 378     else
 379     {
 380         filename[0] = '\0';
 381         rb->strcpy(eol,"\n");
 382     }
 383 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 384     rb->cpu_boost(0);
 385 #endif
 386     /* now dump it in the list */
 387     setup_lists(&lists,0);
 388     rb->lcd_update();
 389     while (!exit)
 390     {
 391         rb->gui_synclist_draw(&lists);
 392         cur_sel = rb->gui_synclist_get_sel_pos(&lists);
 393         button = rb->get_action(CONTEXT_LIST,TIMEOUT_BLOCK);
 394         if (rb->gui_synclist_do_button(&lists,&button,LIST_WRAP_UNLESS_HELD))
 395             continue;
 396         switch (button)
 397         {
 398             case ACTION_STD_OK:
 399             {
 400                 if (line_count)
 401                     rb->strcpy(temp_line,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 402 #ifdef HAVE_LCD_COLOR
 403                 if (edit_colors_file && line_count)
 404                 {
 405                     char *name = temp_line, *value = NULL;
 406                     char extension[MAX_LINE_LEN];
 407                     int color, old_color;
 408                     bool temp_changed;
 409                     rb->settings_parseline(temp_line, &name, &value);
 410                     if (line_count)
 411                     {
 412                         MENUITEM_STRINGLIST(menu, "Edit What?", NULL,
 413                                             "Extension", "Colour",);
 414                         rb->strcpy(extension, name);
 415                         if (value)
 416                             hex_to_rgb(value, &color);
 417                         else
 418                             color = 0;
 419
 420                         switch (rb->do_menu(&menu, NULL, NULL, false))
 421                         {
 422                             case 0:
 423                                 temp_changed = !rb->kbd_input(extension,MAX_LINE_LEN);
 424                                 break;
 425                             case 1:
 426                                 old_color = color;
 427                                 rb->set_color(rb->screens[SCREEN_MAIN], name, &color, -1);
 428                                 temp_changed = (value == NULL) || (color != old_color);
 429                                 break;
 430                             default:
 431                                 /* Should never happen but makes compiler happy */
 432                                 temp_changed = false;
 433                         }
 434
 435                         if (temp_changed)
 436                         {
 437                             rb->snprintf(temp_line, MAX_LINE_LEN, "%s: %02X%02X%02X",
 438                                          extension, RGB_UNPACK_RED(color),
 439                                          RGB_UNPACK_GREEN(color),
 440                                          RGB_UNPACK_BLUE(color));
 441                             do_action(ACTION_UPDATE, temp_line, cur_sel);
 442                             changed = true;
 443                         }
 444                     }
 445                 }
 446                 else
 447 #endif
 448                 if (!rb->kbd_input(temp_line,MAX_LINE_LEN))
 449                 {
 450                     if (line_count)
 451                         do_action(ACTION_UPDATE,temp_line,cur_sel);
 452                     else
 453                         do_action(ACTION_INSERT,temp_line,cur_sel);
 454                     changed = true;
 455                 }
 456             }
 457             break;
 458             case ACTION_STD_CONTEXT:
 459                 if (!line_count) break;
 460                 rb->strcpy(copy_buffer,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 461                 do_action(ACTION_REMOVE,0,cur_sel);
 462                 changed = true;
 463             break;
 464             case ACTION_STD_MENU:
 465             { /* do the item menu */
 466                 switch (do_item_menu(cur_sel, copy_buffer))
 467                 {
 468                     case MENU_RET_SAVE:
 469                         save_changes(1);
 470                         changed = false;
 471                     break;
 472                     case MENU_RET_UPDATE:
 473                         changed = true;
 474                     break;
 475                     case MENU_RET_NO_UPDATE:
 476                     break;
 477                 }
 478             }
 479             break;
 480             case ACTION_STD_CANCEL:
 481                 if (changed)
 482                 {
 483                     MENUITEM_STRINGLIST(menu, "Do What?", NULL,
 484                                         "Return",
 485                                         "Show Playback Menu", "Save Changes",
 486                                         "Save As...", "Save and Exit",
 487                                         "Ignore Changes and Exit");
 488                     switch (rb->do_menu(&menu, NULL, NULL, false))
 489                     {
 490                         case 0:
 491                         break;
 492                         case 1:
 493                             playback_control(NULL);
 494                         break;
 495                         case 2: //save to disk
 496                             save_changes(1);
 497                             changed = 0;
 498                         break;
 499                         case 3:
 500                             save_changes(0);
 501                             changed = 0;
 502                         break;
 503
 504                         case 4:
 505                             save_changes(1);
 506                             exit=1;
 507                         break;
 508                         case 5:
 509                             exit=1;
 510                         break;
 511                     }
 512                 }
 513                 else exit=1;
 514             break;
 515         }
 516         rb->gui_synclist_set_nb_items(&lists,line_count);
 517     }
 518     rb->global_settings->statusbar = prev_show_statusbar;
 519     return PLUGIN_OK;
 520 }