apps/plugins/text_viewer/text_viewer.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 Gilles Roux
  11  *               2003 Garrett Derner
  12  *               2010 Yoshihisa Uchida
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version 2
  17  * of the License, or (at your option) any later version.
  18  *
  19  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  20  * KIND, either express or implied.
  21  *
  22  ****************************************************************************/
  23 #include "plugin.h"
  24 #include "tv_action.h"
  25 #include "tv_button.h"
  26 #include "tv_preferences.h"
  27
  28 PLUGIN_HEADER
  29
  30 enum plugin_status plugin_start(const void* file)
  31 {
  32     int button;
  33     int lastbutton = BUTTON_NONE;
  34     bool autoscroll = false;
  35     long old_tick;
  36     bool done = false;
  37     bool display_update = true;
  38
  39     old_tick = *rb->current_tick;
  40
  41     if (!file)
  42         return PLUGIN_ERROR;
  43
  44     if (!tv_init(file)) {
  45         rb->splash(HZ, "Error opening file");
  46         return PLUGIN_ERROR;
  47     }
  48
  49 #if LCD_DEPTH > 1
  50     rb->lcd_set_backdrop(NULL);
  51 #endif
  52
  53     while (!done) {
  54
  55         if (display_update)
  56             tv_draw();
  57
  58         display_update = true;
  59
  60         button = rb->button_get_w_tmo(HZ/10);
  61
  62         switch (button) {
  63             case TV_MENU:
  64 #ifdef TV_MENU2
  65             case TV_MENU2:
  66 #endif
  67                 {
  68                     unsigned res = tv_menu();
  69
  70                     if (res != TV_MENU_RESULT_EXIT_MENU)
  71                     {
  72                         tv_exit(NULL);
  73                         done = true;
  74                         if (res == TV_MENU_RESULT_ATTACHED_USB)
  75                             return PLUGIN_USB_CONNECTED;
  76                     }
  77                 }
  78                 break;
  79
  80             case TV_AUTOSCROLL:
  81 #ifdef TV_AUTOSCROLL_PRE
  82                 if (lastbutton != TV_AUTOSCROLL_PRE)
  83                     break;
  84 #endif
  85                 autoscroll = !autoscroll;
  86                 break;
  87
  88             case TV_SCROLL_UP:
  89             case TV_SCROLL_UP | BUTTON_REPEAT:
  90 #ifdef TV_SCROLL_UP2
  91             case TV_SCROLL_UP2:
  92             case TV_SCROLL_UP2 | BUTTON_REPEAT:
  93 #endif
  94                 tv_scroll_up(TV_VERTICAL_SCROLL_PREFS);
  95                 old_tick = *rb->current_tick;
  96                 break;
  97
  98             case TV_SCROLL_DOWN:
  99             case TV_SCROLL_DOWN | BUTTON_REPEAT:
 100 #ifdef TV_PAGE_DOWN2
 101             case TV_SCROLL_DOWN2:
 102             case TV_SCROLL_DOWN2 | BUTTON_REPEAT:
 103 #endif
 104                 tv_scroll_down(TV_VERTICAL_SCROLL_PREFS);
 105                 old_tick = *rb->current_tick;
 106                 break;
 107
 108             case TV_SCREEN_LEFT:
 109             case TV_SCREEN_LEFT | BUTTON_REPEAT:
 110                 if (preferences->windows > 1)
 111                 {
 112                     /* Screen left */
 113                     tv_scroll_left(TV_HORIZONTAL_SCROLL_PREFS);
 114                 }
 115                 else {   /* prefs->windows == 1 */
 116                     if (preferences->narrow_mode == NM_PAGE)
 117                     {
 118                         /* scroll to previous page */
 119                         tv_scroll_up(TV_VERTICAL_SCROLL_PAGE);
 120                     }
 121                     else
 122                     {
 123                         /* Top of file */
 124                         tv_top();
 125                     }
 126                 }
 127                 break;
 128
 129             case TV_SCREEN_RIGHT:
 130             case TV_SCREEN_RIGHT | BUTTON_REPEAT:
 131                 if (preferences->windows > 1)
 132                 {
 133                     /* Screen right */
 134                     tv_scroll_right(TV_HORIZONTAL_SCROLL_PREFS);
 135                 }
 136                 else {   /* prefs->windows == 1 */
 137                     if (preferences->narrow_mode == NM_PAGE)
 138                     {
 139                         /* scroll to next page */
 140                         tv_scroll_down(TV_VERTICAL_SCROLL_PAGE);
 141                     }
 142                     else
 143                     {
 144                         /* Bottom of file */
 145                         tv_bottom();
 146                     }
 147                 }
 148                 break;
 149
 150 #ifdef TV_LINE_UP
 151             case TV_LINE_UP:
 152             case TV_LINE_UP | BUTTON_REPEAT:
 153                 /* Scroll up one line */
 154                 tv_scroll_up(TV_VERTICAL_SCROLL_LINE);
 155                 old_tick = *rb->current_tick;
 156                 break;
 157
 158             case TV_LINE_DOWN:
 159             case TV_LINE_DOWN | BUTTON_REPEAT:
 160                 /* Scroll down one line */
 161                 tv_scroll_down(TV_VERTICAL_SCROLL_LINE);
 162                 old_tick = *rb->current_tick;
 163                 break;
 164 #endif
 165 #ifdef TV_COLUMN_LEFT
 166             case TV_COLUMN_LEFT:
 167             case TV_COLUMN_LEFT | BUTTON_REPEAT:
 168                 /* Scroll left one column */
 169                 tv_scroll_left(TV_HORIZONTAL_SCROLL_COLUMN);
 170                 break;
 171
 172             case TV_COLUMN_RIGHT:
 173             case TV_COLUMN_RIGHT | BUTTON_REPEAT:
 174                 /* Scroll right one column */
 175                 tv_scroll_right(TV_HORIZONTAL_SCROLL_COLUMN);
 176                 break;
 177 #endif
 178
 179 #ifdef TV_RC_QUIT
 180             case TV_RC_QUIT:
 181 #endif
 182             case TV_QUIT:
 183 #ifdef TV_QUIT2
 184             case TV_QUIT2:
 185 #endif
 186                 tv_exit(NULL);
 187                 done = true;
 188                 break;
 189
 190             case TV_BOOKMARK:
 191                 tv_add_or_remove_bookmark();
 192                 break;
 193
 194             default:
 195                 if (rb->default_event_handler_ex(button, tv_exit, NULL)
 196                     == SYS_USB_CONNECTED)
 197                     return PLUGIN_USB_CONNECTED;
 198                 display_update = false;
 199                 break;
 200         }
 201         if (button != BUTTON_NONE)
 202         {
 203             lastbutton = button;
 204             rb->yield();
 205         }
 206         if (autoscroll)
 207         {
 208             if(old_tick <= *rb->current_tick - (110 - preferences->autoscroll_speed * 10))
 209             {
 210                 tv_scroll_down(TV_VERTICAL_SCROLL_PREFS);
 211                 old_tick = *rb->current_tick;
 212                 display_update = true;
 213             }
 214         }
 215     }
 216     return PLUGIN_OK;
 217 }