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     const struct tv_preferences *prefs = tv_get_preferences();
  39
  40     old_tick = *rb->current_tick;
  41
  42     if (!file)
  43         return PLUGIN_ERROR;
  44
  45     if (!tv_init(file)) {
  46         rb->splash(HZ, "Error opening file");
  47         return PLUGIN_ERROR;
  48     }
  49
  50 #if LCD_DEPTH > 1
  51     rb->lcd_set_backdrop(NULL);
  52 #endif
  53
  54     while (!done) {
  55
  56         if (display_update)
  57             tv_draw();
  58
  59         display_update = true;
  60
  61         button = rb->button_get_w_tmo(HZ/10);
  62
  63         switch (button) {
  64             case TV_MENU:
  65 #ifdef TV_MENU2
  66             case TV_MENU2:
  67 #endif
  68                 {
  69                     enum tv_menu_result res = tv_menu();
  70
  71                     if (res != TV_MENU_RESULT_EXIT_MENU)
  72                     {
  73                         tv_exit(NULL);
  74                         done = true;
  75                         if (res == TV_MENU_RESULT_ATTACHED_USB)
  76                             return PLUGIN_USB_CONNECTED;
  77                     }
  78                 }
  79                 break;
  80
  81             case TV_AUTOSCROLL:
  82 #ifdef TV_AUTOSCROLL_PRE
  83                 if (lastbutton != TV_AUTOSCROLL_PRE)
  84                     break;
  85 #endif
  86                 autoscroll = !autoscroll;
  87                 break;
  88
  89             case TV_SCROLL_UP:
  90             case TV_SCROLL_UP | BUTTON_REPEAT:
  91 #ifdef TV_SCROLL_UP2
  92             case TV_SCROLL_UP2:
  93             case TV_SCROLL_UP2 | BUTTON_REPEAT:
  94 #endif
  95                 tv_scroll_up(TV_VERTICAL_SCROLL_PREFS);
  96                 old_tick = *rb->current_tick;
  97                 break;
  98
  99             case TV_SCROLL_DOWN:
 100             case TV_SCROLL_DOWN | BUTTON_REPEAT:
 101 #ifdef TV_PAGE_DOWN2
 102             case TV_SCROLL_DOWN2:
 103             case TV_SCROLL_DOWN2 | BUTTON_REPEAT:
 104 #endif
 105                 tv_scroll_down(TV_VERTICAL_SCROLL_PREFS);
 106                 old_tick = *rb->current_tick;
 107                 break;
 108
 109             case TV_SCREEN_LEFT:
 110             case TV_SCREEN_LEFT | BUTTON_REPEAT:
 111                 if (prefs->windows > 1)
 112                 {
 113                     /* Screen left */
 114                     tv_scroll_left(TV_HORIZONTAL_SCROLL_PREFS);
 115                 }
 116                 else {   /* prefs->windows == 1 */
 117                     if (prefs->narrow_mode == NM_PAGE)
 118                     {
 119                         /* scroll to previous page */
 120                         tv_scroll_up(TV_VERTICAL_SCROLL_PAGE);
 121                     }
 122                     else
 123                     {
 124                         /* Top of file */
 125                         tv_top();
 126                     }
 127                 }
 128                 break;
 129
 130             case TV_SCREEN_RIGHT:
 131             case TV_SCREEN_RIGHT | BUTTON_REPEAT:
 132                 if (prefs->windows > 1)
 133                 {
 134                     /* Screen right */
 135                     tv_scroll_right(TV_HORIZONTAL_SCROLL_PREFS);
 136                 }
 137                 else {   /* prefs->windows == 1 */
 138                     if (prefs->narrow_mode == NM_PAGE)
 139                     {
 140                         /* scroll to next page */
 141                         tv_scroll_down(TV_VERTICAL_SCROLL_PAGE);
 142                     }
 143                     else
 144                     {
 145                         /* Bottom of file */
 146                         tv_bottom();
 147                     }
 148                 }
 149                 break;
 150
 151 #ifdef TV_LINE_UP
 152             case TV_LINE_UP:
 153             case TV_LINE_UP | BUTTON_REPEAT:
 154                 /* Scroll up one line */
 155                 tv_scroll_up(TV_VERTICAL_SCROLL_LINE);
 156                 old_tick = *rb->current_tick;
 157                 break;
 158
 159             case TV_LINE_DOWN:
 160             case TV_LINE_DOWN | BUTTON_REPEAT:
 161                 /* Scroll down one line */
 162                 tv_scroll_down(TV_VERTICAL_SCROLL_LINE);
 163                 old_tick = *rb->current_tick;
 164                 break;
 165 #endif
 166 #ifdef TV_COLUMN_LEFT
 167             case TV_COLUMN_LEFT:
 168             case TV_COLUMN_LEFT | BUTTON_REPEAT:
 169                 /* Scroll left one column */
 170                 tv_scroll_left(TV_HORIZONTAL_SCROLL_COLUMN);
 171                 break;
 172
 173             case TV_COLUMN_RIGHT:
 174             case TV_COLUMN_RIGHT | BUTTON_REPEAT:
 175                 /* Scroll right one column */
 176                 tv_scroll_right(TV_HORIZONTAL_SCROLL_COLUMN);
 177                 break;
 178 #endif
 179
 180 #ifdef TV_RC_QUIT
 181             case TV_RC_QUIT:
 182 #endif
 183             case TV_QUIT:
 184 #ifdef TV_QUIT2
 185             case TV_QUIT2:
 186 #endif
 187                 tv_exit(NULL);
 188                 done = true;
 189                 break;
 190
 191             case TV_BOOKMARK:
 192                 tv_add_or_remove_bookmark();
 193                 break;
 194
 195             default:
 196                 if (rb->default_event_handler_ex(button, tv_exit, NULL)
 197                     == SYS_USB_CONNECTED)
 198                     return PLUGIN_USB_CONNECTED;
 199                 display_update = false;
 200                 break;
 201         }
 202         if (button != BUTTON_NONE)
 203         {
 204             lastbutton = button;
 205             rb->yield();
 206         }
 207         if (autoscroll)
 208         {
 209             if(old_tick <= *rb->current_tick - (110 - prefs->autoscroll_speed * 10))
 210             {
 211                 tv_scroll_down(TV_VERTICAL_SCROLL_PREFS);
 212                 old_tick = *rb->current_tick;
 213                 display_update = true;
 214             }
 215         }
 216     }
 217     return PLUGIN_OK;
 218 }