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