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 #define MAX_LINE_LEN 2048
  25
  26
  27 static unsigned char *buffer;
  28 static size_t buffer_size;
  29 static size_t char_count = 0;
  30 static int line_count = 0;
  31 static int last_action_line = 0;
  32 static int last_char_index = 0;
  33 static bool audio_buf = false;
  34
  35 static char temp_line[MAX_LINE_LEN];
  36 static char copy_buffer[MAX_LINE_LEN];
  37 static char filename[MAX_PATH];
  38 static char eol[3];
  39 static bool newfile;
  40
  41 #define ACTION_INSERT 0
  42 #define ACTION_GET    1
  43 #define ACTION_REMOVE 2
  44 #define ACTION_UPDATE 3
  45 #define ACTION_CONCAT 4
  46
  47 static char* _do_action(int action, char* str, int line);
  48 #ifndef HAVE_ADJUSTABLE_CPU_FREQ
  49 #define do_action _do_action
  50 #else
  51 static char* do_action(int action, char* str, int line)
  52 {
  53     char *r;
  54     rb->cpu_boost(1);
  55     r = _do_action(action,str,line);
  56     rb->cpu_boost(0);
  57     return r;
  58 }
  59 #endif
  60
  61 static char* _do_action(int action, char* str, int line)
  62 {
  63     int len, lennew;
  64     int i=0,c=0;
  65     if (line>=last_action_line)
  66     {
  67         i = last_action_line;
  68         c = last_char_index;
  69     }
  70     while (i<line && i<line_count)
  71     {
  72         c += rb->strlen(&buffer[c])+1;
  73         i++;
  74     }
  75     switch (action)
  76     {
  77         case ACTION_INSERT:
  78             len = rb->strlen(str)+1;
  79             if ( char_count+ len > buffer_size )
  80                 return NULL;
  81             rb->memmove(&buffer[c+len],&buffer[c],char_count-c);
  82             rb->strcpy(&buffer[c],str);
  83             char_count += len;
  84             line_count++;
  85             break;
  86         case ACTION_GET:
  87             if (line > line_count)
  88                 return &buffer[0];
  89             break;
  90         case ACTION_REMOVE:
  91             if (line > line_count)
  92                 return NULL;
  93             len = rb->strlen(&buffer[c])+1;
  94             rb->memmove(&buffer[c],&buffer[c+len],char_count-c-len);
  95             char_count -= len;
  96             line_count--;
  97             break;
  98         case ACTION_UPDATE:
  99             if (line > line_count)
 100                 return NULL;
 101             len = rb->strlen(&buffer[c])+1;
 102             lennew = rb->strlen(str)+1;
 103             if ( char_count+ lennew-len > buffer_size )
 104                 return NULL;
 105             rb->memmove(&buffer[c+lennew],&buffer[c+len],char_count-c-len);
 106             rb->strcpy(&buffer[c],str);
 107             char_count += lennew-len;
 108             break;
 109         case ACTION_CONCAT:
 110             if (line > line_count)
 111                 return NULL;
 112             rb->memmove(&buffer[c-1],&buffer[c],char_count-c);
 113             char_count--;
 114             line_count--;
 115             break;
 116         default:
 117             return NULL;
 118     }
 119     last_action_line = i;
 120     last_char_index = c;
 121     return &buffer[c];
 122 }
 123 static const char* list_get_name_cb(int selected_item, void* data,
 124                                     char* buf, size_t buf_len)
 125 {
 126     (void)data;
 127     char *b = do_action(ACTION_GET, 0, selected_item);
 128     /* strlcpy(dst, src, siz) returns strlen(src) */
 129     if (rb->strlcpy(buf, b, buf_len) >= buf_len)
 130     {
 131         rb->strcpy(&buf[buf_len-10], " ...");
 132     }
 133     return buf;
 134 }
 135
 136 static 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 static 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, 0666);
 184     if (fd < 0)
 185     {
 186         newfile = true;
 187         rb->splash(HZ*2, "Changes NOT saved");
 188         return false;
 189     }
 190
 191     rb->lcd_clear_display();
 192 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 193     rb->cpu_boost(1);
 194 #endif
 195     for (i=0;i<line_count;i++)
 196     {
 197         rb->fdprintf(fd,"%s%s", do_action(ACTION_GET, 0, i), eol);
 198     }
 199 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 200     rb->cpu_boost(0);
 201 #endif
 202     rb->close(fd);
 203
 204     if (newfile || !overwrite)
 205         /* current directory may have changed */
 206         rb->reload_directory();
 207
 208     newfile = false;
 209     return true;
 210 }
 211
 212 static void setup_lists(struct gui_synclist *lists, int sel)
 213 {
 214     rb->gui_synclist_init(lists,list_get_name_cb,0, false, 1, NULL);
 215     rb->gui_synclist_set_icon_callback(lists,NULL);
 216     rb->gui_synclist_set_nb_items(lists,line_count);
 217     rb->gui_synclist_limit_scroll(lists,true);
 218     rb->gui_synclist_select_item(lists, sel);
 219     rb->gui_synclist_draw(lists);
 220 }
 221
 222 enum {
 223     MENU_RET_SAVE = -1,
 224     MENU_RET_NO_UPDATE,
 225     MENU_RET_UPDATE,
 226 };
 227 static int do_item_menu(int cur_sel)
 228 {
 229     int ret = MENU_RET_NO_UPDATE;
 230     MENUITEM_STRINGLIST(menu, "Line Options", NULL,
 231                         "Cut/Delete", "Copy",
 232                         "Insert Above", "Insert Below",
 233                         "Concat To Above",
 234                         "Save", "Playback Control");
 235
 236     switch (rb->do_menu(&menu, NULL, NULL, false))
 237     {
 238         case 0: /* cut */
 239             rb->strlcpy(copy_buffer, do_action(ACTION_GET, 0, cur_sel),
 240                         MAX_LINE_LEN);
 241             do_action(ACTION_REMOVE, 0, cur_sel);
 242             ret = MENU_RET_UPDATE;
 243         break;
 244         case 1: /* copy */
 245             rb->strlcpy(copy_buffer, do_action(ACTION_GET, 0, cur_sel),
 246                         MAX_LINE_LEN);
 247             ret = MENU_RET_NO_UPDATE;
 248         break;
 249         case 2: /* insert above */
 250             if (!rb->kbd_input(copy_buffer,MAX_LINE_LEN))
 251             {
 252                 do_action(ACTION_INSERT,copy_buffer,cur_sel);
 253                 copy_buffer[0]='\0';
 254                 ret = MENU_RET_UPDATE;
 255             }
 256         break;
 257         case 3: /* insert below */
 258             if (!rb->kbd_input(copy_buffer,MAX_LINE_LEN))
 259             {
 260                 do_action(ACTION_INSERT,copy_buffer,cur_sel+1);
 261                 copy_buffer[0]='\0';
 262                 ret = MENU_RET_UPDATE;
 263             }
 264         break;
 265         case 4: /* cat to above */
 266             if (cur_sel>0)
 267             {
 268                 do_action(ACTION_CONCAT,0,cur_sel);
 269                 ret = MENU_RET_UPDATE;
 270             }
 271         break;
 272         case 5: /* save */
 273             ret = MENU_RET_SAVE;
 274         break;
 275         case 6: /* playback menu */
 276             if (!audio_buf)
 277                 playback_control(NULL);
 278             else
 279                 rb->splash(HZ, "Cannot restart playback");
 280             ret = MENU_RET_NO_UPDATE;
 281         break;
 282         default:
 283             ret = MENU_RET_NO_UPDATE;
 284         break;
 285     }
 286     return ret;
 287 }
 288
 289 #ifdef HAVE_LCD_COLOR
 290
 291 #define hex2dec(c) (((c) >= '0' && ((c) <= '9')) ? (toupper(c)) - '0' : \
 292                                                    (toupper(c)) - 'A' + 10)
 293
 294 static int my_hex_to_rgb(const char* hex, int* color)
 295 {   int ok = 1;
 296     int i;
 297     int red, green, blue;
 298
 299     if (rb->strlen(hex) == 6) {
 300         for (i=0; i < 6; i++ ) {
 301             if (!isxdigit(hex[i])) {
 302                 ok=0;
 303                 break;
 304             }
 305         }
 306
 307         if (ok) {
 308             red = (hex2dec(hex[0]) << 4) | hex2dec(hex[1]);
 309             green = (hex2dec(hex[2]) << 4) | hex2dec(hex[3]);
 310             blue = (hex2dec(hex[4]) << 4) | hex2dec(hex[5]);
 311             *color = LCD_RGBPACK(red,green,blue);
 312             return 0;
 313         }
 314     }
 315
 316     return -1;
 317 }
 318 #endif /* HAVE_LCD_COLOR */
 319
 320 /* this is the plugin entry point */
 321 enum plugin_status plugin_start(const void* parameter)
 322 {
 323     int fd;
 324
 325     struct gui_synclist lists;
 326     bool exit = false;
 327     int button;
 328     bool changed = false;
 329     int cur_sel=0;
 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     buffer = rb->plugin_get_buffer(&buffer_size);
 340
 341 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 342     rb->cpu_boost(1);
 343 #endif
 344     if (parameter)
 345     {
 346 #ifdef HAVE_LCD_COLOR
 347         char *c = NULL;
 348 #endif
 349         rb->strlcpy(filename, (char*)parameter, MAX_PATH);
 350         get_eol_string(filename);
 351         fd = rb->open(filename,O_RDONLY);
 352         if (fd<0)
 353         {
 354             rb->splashf(HZ*2, "Couldnt open file: %s", filename);
 355             return PLUGIN_ERROR;
 356         }
 357 #ifdef HAVE_LCD_COLOR
 358         c = rb->strrchr(filename, '.');
 359         if (c && !rb->strcmp(c, ".colours"))
 360             edit_colors_file = true;
 361 #endif
 362         if (buffer_size <= (size_t)rb->filesize(fd) + 0x400)
 363         {
 364             buffer = rb->plugin_get_audio_buffer(&buffer_size);
 365             audio_buf = true;
 366         }
 367         /* read in the file */
 368         while (rb->read_line(fd,temp_line,MAX_LINE_LEN) > 0)
 369         {
 370             if (!do_action(ACTION_INSERT,temp_line,line_count))
 371             {
 372                 rb->splashf(HZ*2,"Error reading file: %s",(char*)parameter);
 373                 rb->close(fd);
 374                 return PLUGIN_ERROR;
 375             }
 376         }
 377         rb->close(fd);
 378         newfile = false;
 379     }
 380     else
 381     {
 382         rb->strcpy(filename,"/");
 383         rb->strcpy(eol,"\n");
 384         newfile = true;
 385     }
 386
 387 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 388     rb->cpu_boost(0);
 389 #endif
 390     /* now dump it in the list */
 391     setup_lists(&lists,0);
 392     rb->lcd_update();
 393     while (!exit)
 394     {
 395         rb->gui_synclist_draw(&lists);
 396         cur_sel = rb->gui_synclist_get_sel_pos(&lists);
 397         button = rb->get_action(CONTEXT_LIST,TIMEOUT_BLOCK);
 398         if (rb->gui_synclist_do_button(&lists,&button,LIST_WRAP_UNLESS_HELD))
 399             continue;
 400         switch (button)
 401         {
 402             case ACTION_STD_OK:
 403             {
 404                 if (line_count)
 405                     rb->strlcpy(temp_line, do_action(ACTION_GET, 0, cur_sel),
 406                                 MAX_LINE_LEN);
 407 #ifdef HAVE_LCD_COLOR
 408                 if (edit_colors_file && line_count)
 409                 {
 410                     char *name = temp_line, *value = NULL;
 411                     char extension[16];
 412                     int color, old_color;
 413                     bool temp_changed = false;
 414
 415                     MENUITEM_STRINGLIST(menu, "Edit What?", NULL,
 416                                         "Extension", "Colour");
 417
 418                     rb->settings_parseline(temp_line, &name, &value);
 419                     rb->strlcpy(extension, name, sizeof(extension));
 420                     if (value)
 421                         my_hex_to_rgb(value, &color);
 422                     else
 423                         color = 0;
 424
 425                     switch (rb->do_menu(&menu, NULL, NULL, false))
 426                     {
 427                         case 0:
 428                             temp_changed = !rb->kbd_input(extension, sizeof(extension));
 429                             break;
 430                         case 1:
 431                             old_color = color;
 432                             rb->set_color(rb->screens[SCREEN_MAIN], name, &color, -1);
 433                             temp_changed = (value == NULL) || (color != old_color);
 434                             break;
 435                     }
 436
 437                     if (temp_changed)
 438                     {
 439                         rb->snprintf(temp_line, MAX_LINE_LEN, "%s: %02X%02X%02X",
 440                                      extension, RGB_UNPACK_RED(color),
 441                                      RGB_UNPACK_GREEN(color),
 442                                      RGB_UNPACK_BLUE(color));
 443                         do_action(ACTION_UPDATE, temp_line, cur_sel);
 444                         changed = true;
 445                     }
 446                 }
 447                 else
 448 #endif
 449                 if (!rb->kbd_input(temp_line,MAX_LINE_LEN))
 450                 {
 451                     if (line_count)
 452                         do_action(ACTION_UPDATE,temp_line,cur_sel);
 453                     else
 454                         do_action(ACTION_INSERT,temp_line,cur_sel);
 455                     changed = true;
 456                 }
 457             }
 458             break;
 459             case ACTION_STD_CONTEXT:
 460                 if (!line_count) break;
 461                 rb->strlcpy(copy_buffer, do_action(ACTION_GET, 0, cur_sel),
 462                             MAX_LINE_LEN);
 463                 do_action(ACTION_REMOVE, 0, cur_sel);
 464                 changed = true;
 465             break;
 466             case ACTION_STD_MENU:
 467             {
 468                 /* do the item menu */
 469                 switch (do_item_menu(cur_sel))
 470                 {
 471                     case MENU_RET_SAVE:
 472                         if(save_changes(1))
 473                             changed = false;
 474                     break;
 475                     case MENU_RET_UPDATE:
 476                         changed = true;
 477                     break;
 478                     case MENU_RET_NO_UPDATE:
 479                     break;
 480                 }
 481             }
 482             break;
 483             case ACTION_STD_CANCEL:
 484                 if (changed)
 485                 {
 486                     MENUITEM_STRINGLIST(menu, "Do What?", NULL,
 487                                         "Return",
 488                                         "Playback Control", "Save Changes",
 489                                         "Save As...", "Save and Exit",
 490                                         "Ignore Changes and Exit");
 491                     switch (rb->do_menu(&menu, NULL, NULL, false))
 492                     {
 493                         case 0:
 494                         break;
 495                         case 1:
 496                             if (!audio_buf)
 497                                 playback_control(NULL);
 498                             else
 499                                 rb->splash(HZ, "Cannot restart playback");
 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                         case 4:
 510                             if(save_changes(1))
 511                                 exit=1;
 512                         break;
 513                         case 5:
 514                             exit=1;
 515                         break;
 516                     }
 517                 }
 518                 else exit=1;
 519             break;
 520         }
 521         rb->gui_synclist_set_nb_items(&lists,line_count);
 522         if(line_count > 0 && line_count <= cur_sel)
 523             rb->gui_synclist_select_item(&lists,line_count-1);
 524     }
 525     return PLUGIN_OK;
 526 }