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  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19 #include "plugin.h"
  20 #include "action.h"
  21 #include "playback_control.h"
  22
  23 #if PLUGIN_BUFFER_SIZE > 0x45000
  24 #define MAX_CHARS    0x40000 /* 128 kiB */
  25 #else
  26 #define MAX_CHARS   0x6000 /* 24 kiB */
  27 #endif
  28 #define MAX_LINE_LEN 2048
  29 PLUGIN_HEADER
  30 static struct plugin_api* rb;
  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;
  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);
  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             char_count -= len;
  96             rb->memmove(&buffer[c],&buffer[c+len],char_count);
  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             rb->memmove(&buffer[c+rb->strlen(str)+1],&buffer[c+len],char_count);
 104             rb->strcpy(&buffer[c],str);
 105             char_count += rb->strlen(str)+1-len;
 106             break;
 107         case ACTION_CONCAT:
 108             if (line > line_count)
 109                 return 0;
 110             rb->memmove(&buffer[c-1],&buffer[c],char_count);
 111             break;
 112         default:
 113             return 0;
 114     }
 115     last_action_line = i;
 116     last_char_index = c;
 117     return 1;
 118 }
 119 char *list_get_name_cb(int selected_item,void* data,char* buf)
 120 {
 121     char *b = &buffer[do_action(ACTION_GET,0,selected_item)];
 122     (void)data;
 123     if (rb->strlen(b) >= MAX_PATH)
 124     {
 125         char t = b[MAX_PATH-10];
 126         b[MAX_PATH-10] = '\0';
 127         rb->snprintf(buf,MAX_PATH,"%s ...",b);
 128         b[MAX_PATH-10] = t;
 129     }
 130     else rb->strcpy(buf,b);
 131     return buf;
 132 }
 133 char filename[MAX_PATH];
 134 int get_eol_string(char* fn)
 135 {
 136     int fd=-1;
 137     char t;
 138     if (!fn)
 139         return 0;
 140     else if  (!fn[0])
 141         return 0;
 142     fd = rb->PREFIX(open(fn,O_RDONLY));
 143     if (fd<0)
 144         return 0;
 145     eol[0] = '\0';
 146     while (!eol[0])
 147     {
 148         if (!rb->read(fd,&t,1))
 149         {
 150             rb->strcpy(eol,"\n");
 151             return 0;
 152         }
 153         if (t == '\r')
 154         {
 155             if (rb->read(fd,&t,1) && t=='\n')
 156                 rb->strcpy(eol,"\r\n");
 157             else rb->strcpy(eol,"\r");
 158         }
 159         else if (t == '\n')
 160         {
 161             rb->strcpy(eol,"\n");
 162         }
 163     }
 164     rb->close(fd);
 165     return 1;
 166 }
 167
 168 void save_changes(int overwrite)
 169 {
 170     int fd;
 171     int i;
 172
 173     if (!filename[0] || !overwrite)
 174     {
 175         rb->strcpy(filename,"/");
 176         rb->kbd_input(filename,MAX_PATH);
 177     }
 178
 179     fd = rb->open(filename,O_WRONLY|O_CREAT|O_TRUNC);
 180     if (fd < 0)
 181     {
 182         rb->splash(HZ*2, "Changes NOT saved");
 183         return;
 184     }
 185
 186     if (!overwrite)
 187         /* current directory may have changed */
 188         rb->reload_directory();
 189
 190     rb->lcd_clear_display();
 191 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 192     rb->cpu_boost(1);
 193 #endif
 194     for (i=0;i<line_count;i++)
 195     {
 196         rb->fdprintf(fd,"%s%s",&buffer[do_action(ACTION_GET,0,i)],eol);
 197     }
 198 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 199     rb->cpu_boost(0);
 200 #endif
 201     rb->close(fd);
 202 }
 203
 204 void setup_lists(struct gui_synclist *lists, int sel)
 205 {
 206     rb->gui_synclist_init(lists,list_get_name_cb,0, false, 1);
 207     rb->gui_synclist_set_icon_callback(lists,NULL);
 208     rb->gui_synclist_set_nb_items(lists,line_count);
 209     rb->gui_synclist_limit_scroll(lists,true);
 210     rb->gui_synclist_select_item(lists, sel);
 211     rb->gui_synclist_draw(lists);
 212 }
 213 enum {
 214     MENU_RET_SAVE = -1,
 215     MENU_RET_NO_UPDATE,
 216     MENU_RET_UPDATE,
 217 };
 218 int do_item_menu(int cur_sel, char* copy_buffer)
 219 {
 220     int ret = 0;
 221     MENUITEM_STRINGLIST(menu, "Line Options", NULL,
 222                         "Cut/Delete", "Copy",
 223                         "Insert Above", "Insert Below",
 224                         "Concat To Above", "Save");
 225
 226     switch (rb->do_menu(&menu, NULL))
 227     {
 228         case 0: /* cut */
 229             rb->strcpy(copy_buffer,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 230             do_action(ACTION_REMOVE,0,cur_sel);
 231             ret = MENU_RET_UPDATE;
 232         break;
 233         case 1: /* copy */
 234             rb->strcpy(copy_buffer,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 235             ret = MENU_RET_NO_UPDATE;
 236         break;
 237         case 2: /* insert above */
 238             if (!rb->kbd_input(copy_buffer,MAX_LINE_LEN))
 239             {
 240                 do_action(ACTION_INSERT,copy_buffer,cur_sel);
 241                 copy_buffer[0]='\0';
 242                 ret = MENU_RET_UPDATE;
 243             }
 244         break;
 245         case 3: /* insert below */
 246             if (!rb->kbd_input(copy_buffer,MAX_LINE_LEN))
 247             {
 248                 do_action(ACTION_INSERT,copy_buffer,cur_sel+1);
 249                 copy_buffer[0]='\0';
 250                 ret = MENU_RET_UPDATE;
 251             }
 252         break;
 253         case 4: /* cat to above */
 254             if (cur_sel>0)
 255             {
 256                 do_action(ACTION_CONCAT,0,cur_sel);
 257                 ret = MENU_RET_UPDATE;
 258             }
 259         break;
 260         case 5: /* save */
 261             ret = MENU_RET_SAVE;
 262         break;
 263         default:
 264             ret = MENU_RET_NO_UPDATE;
 265         break;
 266     }
 267     return ret;
 268 }
 269
 270 #ifdef HAVE_LCD_COLOR
 271 /* in misc.h but no need to polute the api */
 272 #define toupper(c) (((c >= 'a') && (c <= 'z'))?c+'A':c)
 273 #define isxdigit(c) ((c>='a' && c<= 'f') || (c>='A' && c<= 'F') \
 274                     || (c>='0' && c<= '9'))
 275 #define hex2dec(c) (((c) >= '0' && ((c) <= '9')) ? (toupper(c)) - '0' : \
 276                                                    (toupper(c)) - 'A' + 10)
 277 int hex_to_rgb(const char* hex)
 278 {   int ok = 1;
 279     int i;
 280     int red, green, blue;
 281
 282     if (rb->strlen(hex) == 6) {
 283         for (i=0; i < 6; i++ ) {
 284             if (!isxdigit(hex[i])) {
 285                 ok=0;
 286                 break;
 287             }
 288         }
 289
 290         if (ok) {
 291             red = (hex2dec(hex[0]) << 4) | hex2dec(hex[1]);
 292             green = (hex2dec(hex[2]) << 4) | hex2dec(hex[3]);
 293             blue = (hex2dec(hex[4]) << 4) | hex2dec(hex[5]);
 294             return LCD_RGBPACK(red,green,blue);
 295         }
 296     }
 297
 298     return 0;
 299 }
 300 #endif /* HAVE_LCD_COLOR */
 301
 302 /* this is the plugin entry point */
 303 enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
 304 {
 305     int fd;
 306     static char temp_line[MAX_LINE_LEN];
 307
 308     struct gui_synclist lists;
 309     bool exit = false;
 310     int button;
 311     bool changed = false;
 312     int cur_sel=0;
 313     static char copy_buffer[MAX_LINE_LEN];
 314     bool prev_show_statusbar;
 315 #ifdef HAVE_LCD_COLOR
 316     bool edit_colors_file = false;
 317 #endif
 318
 319     rb = api;
 320
 321     copy_buffer[0]='\0';
 322     prev_show_statusbar = rb->global_settings->statusbar;
 323     rb->global_settings->statusbar = false;
 324
 325 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 326     rb->cpu_boost(1);
 327 #endif
 328     if (parameter)
 329     {
 330 #ifdef HAVE_LCD_COLOR
 331         char *c = NULL;
 332 #endif
 333         rb->strcpy(filename,(char*)parameter);
 334         if (!get_eol_string(filename))
 335         {
 336             rb->strcpy(eol,"\n");
 337         }
 338         fd = rb->open(filename,O_RDONLY);
 339         if (fd<0)
 340         {
 341             rb->splash(HZ*2,"Couldnt open file: %s",(char*)parameter);
 342             return PLUGIN_ERROR;
 343         }
 344 #ifdef HAVE_LCD_COLOR
 345         c = rb->strrchr(filename, '.');
 346         if (c && !rb->strcmp(c, ".colours"))
 347             edit_colors_file = true;
 348 #endif
 349         /* read in the file */
 350         while (rb->read_line(fd,temp_line,MAX_LINE_LEN))
 351         {
 352             if (!do_action(ACTION_INSERT,temp_line,line_count))
 353             {
 354                 rb->splash(HZ*2,"Error reading file: %s",(char*)parameter);
 355                 rb->close(fd);
 356                 return PLUGIN_ERROR;
 357             }
 358         }
 359         rb->close(fd);
 360     }
 361     else
 362     {
 363         filename[0] = '\0';
 364         rb->strcpy(eol,"\n");
 365     }
 366 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 367     rb->cpu_boost(0);
 368 #endif
 369     /* now dump it in the list */
 370     setup_lists(&lists,0);
 371     rb->lcd_update();
 372     while (!exit)
 373     {
 374         rb->gui_synclist_draw(&lists);
 375         cur_sel = rb->gui_synclist_get_sel_pos(&lists);
 376         button = rb->get_action(CONTEXT_LIST,TIMEOUT_BLOCK);
 377         if (rb->gui_synclist_do_button(&lists,button,LIST_WRAP_UNLESS_HELD))
 378             continue;
 379         switch (button)
 380         {
 381             case ACTION_STD_OK:
 382             {
 383                 bool edit_text = true;
 384 #ifdef HAVE_LCD_COLOR
 385                 int color;
 386 #endif
 387                 if (line_count)
 388                     rb->strcpy(temp_line,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 389 #ifdef HAVE_LCD_COLOR
 390                 if (edit_colors_file)
 391                 {
 392                     char *name = temp_line, *value = NULL;
 393                     char extension[MAX_LINE_LEN];
 394                     rb->settings_parseline(temp_line, &name, &value);
 395                     if (line_count)
 396                     {
 397                         MENUITEM_STRINGLIST(menu, "Edit What?", NULL,
 398                                             "Extension", "Color",);
 399                         switch (rb->do_menu(&menu, NULL))
 400                         {
 401                             case 0:
 402                                 edit_text = true;
 403                                 break;
 404                             case 1:
 405                                 edit_text = false;
 406                                 if (value)
 407                                     color = hex_to_rgb(value);
 408                                 else color = 0;
 409                                 rb->strcpy(extension, name);
 410                                 rb->set_color(rb->screens[SCREEN_MAIN], name, &color, -1);
 411                                 rb->snprintf(temp_line, MAX_LINE_LEN, "%s: %02X%02X%02X",
 412                                              extension, RGB_UNPACK_RED(color),
 413                                              RGB_UNPACK_GREEN(color),
 414                                              RGB_UNPACK_BLUE(color));
 415                                 if (line_count)
 416                                 {
 417                                     do_action(ACTION_UPDATE,temp_line,cur_sel);
 418                                 }
 419                                 else do_action(ACTION_INSERT,temp_line,cur_sel);
 420                                 changed = true;
 421                                 break;
 422                         }
 423                     }
 424                 }
 425 #endif
 426                 if (edit_text &&!rb->kbd_input(temp_line,MAX_LINE_LEN))
 427                 {
 428                     if (line_count)
 429                     {
 430                         do_action(ACTION_UPDATE,temp_line,cur_sel);
 431                     }
 432                     else do_action(ACTION_INSERT,temp_line,cur_sel);
 433                     changed = true;
 434                 }
 435             }
 436             break;
 437 #ifdef TEXT_EDITOR_DELETE
 438             case TEXT_EDITOR_DELETE:
 439 #ifdef TEXT_EDITOR_DELETE_PRE
 440                 if (last_button != TEXT_EDITOR_DELETE_PRE)
 441                     break;
 442 #endif
 443                 if (!line_count) break;
 444                 rb->strcpy(copy_buffer,&buffer[do_action(ACTION_GET,0,cur_sel)]);
 445                 do_action(ACTION_REMOVE,0,cur_sel);
 446                 changed = true;
 447             break;
 448 #endif
 449             case ACTION_STD_MENU:
 450             { /* do the item menu */
 451                 switch (do_item_menu(cur_sel, copy_buffer))
 452                 {
 453                     case MENU_RET_SAVE:
 454                         save_changes(1);
 455                         changed = false;
 456                     break;
 457                     case MENU_RET_UPDATE:
 458                         changed = true;
 459                     break;
 460                     case MENU_RET_NO_UPDATE:
 461                     break;
 462                 }
 463             }
 464             break;
 465             case ACTION_STD_CANCEL:
 466                 if (changed)
 467                 {
 468                     MENUITEM_STRINGLIST(menu, "Do What?", NULL,
 469                                         "Return",
 470                                         "Show Playback Menu", "Save Changes",
 471                                         "Save As...", "Save and Exit",
 472                                         "Ignore Changes and Exit");
 473                     switch (rb->do_menu(&menu, NULL))
 474                     {
 475                         case 0:
 476                         break;
 477                         case 1:
 478                             playback_control(rb);
 479                         break;
 480                         case 2: //save to disk
 481                             save_changes(1);
 482                             changed = 0;
 483                         break;
 484                         case 3:
 485                             save_changes(0);
 486                             changed = 0;
 487                         break;
 488
 489                         case 4:
 490                             save_changes(1);
 491                             exit=1;
 492                         break;
 493                         case 5:
 494                             exit=1;
 495                         break;
 496                     }
 497                 }
 498                 else exit=1;
 499             break;
 500         }
 501         rb->gui_synclist_set_nb_items(&lists,line_count);
 502     }
 503     rb->global_settings->statusbar = prev_show_statusbar;
 504     return PLUGIN_OK;
 505 }