apps/plugins/text_viewer/tv_action.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_bookmark.h"
  26 #include "tv_pager.h"
  27 #include "tv_screen_pos.h"
  28 #include "tv_settings.h"
  29 #include "tv_window.h"
  30
  31 bool tv_init(const unsigned char *file)
  32 {
  33     tv_init_bookmark();
  34
  35     /* initialize modules */
  36     if (!tv_init_window())
  37         return false;
  38
  39     /* load the preferences and bookmark */
  40     tv_load_settings(file);
  41
  42     /* select to read the page */
  43     tv_select_bookmark();
  44     return true;
  45 }
  46
  47 void tv_exit(void *parameter)
  48 {
  49     (void)parameter;
  50
  51     /* save preference and bookmarks */
  52     if (!tv_save_settings())
  53         rb->splash(HZ, "Can't save preferences and bookmarks");
  54
  55     /* finalize modules */
  56     tv_finalize_window();
  57 }
  58
  59 void tv_draw(void)
  60 {
  61     struct tv_screen_pos pos;
  62
  63     tv_copy_screen_pos(&pos);
  64     tv_draw_window();
  65     if (pos.line == 0)
  66         tv_new_page();
  67
  68     tv_move_screen(pos.page, pos.line, SEEK_SET);
  69 }
  70
  71 void tv_scroll_up(unsigned mode)
  72 {
  73     int offset_page = 0;
  74     int offset_line = -1;
  75
  76     if ((mode == TV_VERTICAL_SCROLL_PAGE) ||
  77         (mode == TV_VERTICAL_SCROLL_PREFS && preferences->vertical_scroll_mode == PAGE))
  78     {
  79         offset_page--;
  80 #ifdef HAVE_LCD_BITMAP
  81         offset_line = (preferences->page_mode == OVERLAP)? 1:0;
  82 #endif
  83     }
  84     tv_move_screen(offset_page, offset_line, SEEK_CUR);
  85 }
  86
  87 void tv_scroll_down(unsigned mode)
  88 {
  89     int offset_page = 0;
  90     int offset_line = 1;
  91
  92     if ((mode == TV_VERTICAL_SCROLL_PAGE) ||
  93         (mode == TV_VERTICAL_SCROLL_PREFS && preferences->vertical_scroll_mode == PAGE))
  94     {
  95         offset_page++;
  96 #ifdef HAVE_LCD_BITMAP
  97         offset_line = (preferences->page_mode == OVERLAP)? -1:0;
  98 #endif
  99     }
 100     tv_move_screen(offset_page, offset_line, SEEK_CUR);
 101 }
 102
 103 void tv_scroll_left(unsigned mode)
 104 {
 105     int offset_window = 0;
 106     int offset_column = 0;
 107
 108     if ((mode == TV_HORIZONTAL_SCROLL_COLUMN) ||
 109         (mode == TV_HORIZONTAL_SCROLL_PREFS && preferences->horizontal_scroll_mode == COLUMN))
 110     {
 111         /* Scroll left one column */
 112         offset_column--;
 113     }
 114     else
 115     {
 116         /* Scroll left one window */
 117         offset_window--;
 118     }
 119     tv_move_window(offset_window, offset_column);
 120 }
 121
 122 void tv_scroll_right(unsigned mode)
 123 {
 124     int offset_window = 0;
 125     int offset_column = 0;
 126
 127     if ((mode == TV_HORIZONTAL_SCROLL_COLUMN) ||
 128         (mode == TV_HORIZONTAL_SCROLL_PREFS && preferences->horizontal_scroll_mode == COLUMN))
 129     {
 130         /* Scroll right one column */
 131         offset_column++;
 132     }
 133     else
 134     {
 135         /* Scroll right one window */
 136         offset_window++;
 137     }
 138     tv_move_window(offset_window, offset_column);
 139 }
 140
 141 void tv_top(void)
 142 {
 143     tv_move_screen(0, 0, SEEK_SET);
 144 }
 145
 146 void tv_bottom(void)
 147 {
 148     tv_move_screen(0, 0, SEEK_END);
 149     if (preferences->vertical_scroll_mode == PAGE)
 150         tv_move_screen(0, -tv_get_screen_pos()->line, SEEK_CUR);
 151 }
 152
 153 unsigned tv_menu(void)
 154 {
 155     unsigned res;
 156     struct tv_screen_pos cur_pos;
 157     off_t cur_file_pos = tv_get_screen_pos()->file_pos;
 158
 159     res = tv_display_menu();
 160
 161     if (res == TV_MENU_RESULT_EXIT_MENU)
 162     {
 163         tv_convert_fpos(cur_file_pos, &cur_pos);
 164         if (preferences->vertical_scroll_mode == PAGE)
 165             cur_pos.line = 0;
 166
 167         tv_move_screen(cur_pos.page, cur_pos.line, SEEK_SET);
 168     }
 169     else if (res == TV_MENU_RESULT_MOVE_PAGE)
 170         res = TV_MENU_RESULT_EXIT_MENU;
 171
 172     return res;
 173 }
 174
 175 void tv_add_or_remove_bookmark(void)
 176 {
 177     tv_toggle_bookmark();
 178 }