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 bookmarks_changed = false;
  32 bool scrolled = false;
  33
  34 bool tv_init_action(unsigned char **buf, size_t *size)
  35 {
  36     /* initialize bookmarks and window modules */
  37     return tv_init_bookmark(buf, size) && tv_init_window(buf, size);
  38 }
  39
  40 static void tv_finalize_action(void)
  41 {
  42     /* finalize bookmark modules */
  43     tv_finalize_bookmark();
  44
  45     /* finalize window modules */
  46     tv_finalize_window();
  47 }
  48
  49 void tv_exit(void)
  50 {
  51     /* save preference and bookmarks */
  52     DEBUGF("preferences_changed=%d\tbookmarks_changed=%d\tscrolled=%d\n",preferences_changed,bookmarks_changed,scrolled);
  53     if  ( preferences_changed || bookmarks_changed
  54 #ifndef HAVE_DISK_STORAGE
  55          || scrolled
  56 #endif
  57         )
  58     {
  59         DEBUGF("Saving settings\n");
  60         if (!tv_save_settings())
  61             rb->splash(HZ, "Can't save preferences and bookmarks");
  62     }
  63     else
  64         DEBUGF("Skip saving settings\n");
  65
  66     /* finalize modules */
  67     tv_finalize_action();
  68 }
  69
  70 bool tv_load_file(const unsigned char *file)
  71 {
  72     /* load the preferences and bookmark */
  73     if (!tv_load_settings(file))
  74         return false;
  75
  76     /* select to read the page */
  77     tv_select_bookmark();
  78
  79     return true;
  80 }
  81
  82 void tv_draw(void)
  83 {
  84     struct tv_screen_pos pos;
  85
  86     tv_copy_screen_pos(&pos);
  87     tv_draw_window();
  88     if (pos.line == 0)
  89         tv_new_page();
  90
  91     tv_move_screen(pos.page, pos.line, SEEK_SET);
  92 }
  93
  94 void tv_scroll_up(unsigned mode)
  95 {
  96     int offset_page = 0;
  97     int offset_line = -1;
  98
  99     if ((mode == TV_VERTICAL_SCROLL_PAGE) ||
 100         (mode == TV_VERTICAL_SCROLL_PREFS && preferences->vertical_scroll_mode == VS_PAGE))
 101     {
 102         offset_page--;
 103 #ifdef HAVE_LCD_BITMAP
 104         offset_line = (preferences->overlap_page_mode)? 1:0;
 105 #endif
 106     }
 107     tv_move_screen(offset_page, offset_line, SEEK_CUR);
 108     scrolled = true;
 109 }
 110
 111 void tv_scroll_down(unsigned mode)
 112 {
 113     int offset_page = 0;
 114     int offset_line = 1;
 115
 116     if ((mode == TV_VERTICAL_SCROLL_PAGE) ||
 117         (mode == TV_VERTICAL_SCROLL_PREFS && preferences->vertical_scroll_mode == VS_PAGE))
 118     {
 119         offset_page++;
 120 #ifdef HAVE_LCD_BITMAP
 121         offset_line = (preferences->overlap_page_mode)? -1:0;
 122 #endif
 123     }
 124     tv_move_screen(offset_page, offset_line, SEEK_CUR);
 125     scrolled = true;
 126 }
 127
 128 void tv_scroll_left(unsigned mode)
 129 {
 130     int offset_window = 0;
 131     int offset_column = 0;
 132
 133     if ((mode == TV_HORIZONTAL_SCROLL_COLUMN) ||
 134         (mode == TV_HORIZONTAL_SCROLL_PREFS && preferences->horizontal_scroll_mode == HS_COLUMN))
 135     {
 136         /* Scroll left one column */
 137         offset_column--;
 138     }
 139     else
 140     {
 141         /* Scroll left one window */
 142         offset_window--;
 143     }
 144     tv_move_window(offset_window, offset_column);
 145     scrolled = true;
 146 }
 147
 148 void tv_scroll_right(unsigned mode)
 149 {
 150     int offset_window = 0;
 151     int offset_column = 0;
 152
 153     if ((mode == TV_HORIZONTAL_SCROLL_COLUMN) ||
 154         (mode == TV_HORIZONTAL_SCROLL_PREFS && preferences->horizontal_scroll_mode == HS_COLUMN))
 155     {
 156         /* Scroll right one column */
 157         offset_column++;
 158     }
 159     else
 160     {
 161         /* Scroll right one window */
 162         offset_window++;
 163     }
 164     tv_move_window(offset_window, offset_column);
 165     scrolled = true;
 166 }
 167
 168 void tv_top(void)
 169 {
 170     tv_move_screen(0, 0, SEEK_SET);
 171 }
 172
 173 void tv_bottom(void)
 174 {
 175     tv_move_screen(0, 0, SEEK_END);
 176     if (preferences->vertical_scroll_mode == VS_PAGE)
 177         tv_move_screen(0, -tv_get_screen_pos()->line, SEEK_CUR);
 178 }
 179
 180 unsigned tv_menu(void)
 181 {
 182     unsigned res;
 183     struct tv_screen_pos cur_pos;
 184     off_t cur_file_pos = tv_get_screen_pos()->file_pos;
 185
 186     res = tv_display_menu();
 187
 188     if (res == TV_MENU_RESULT_EXIT_MENU)
 189     {
 190         tv_convert_fpos(cur_file_pos, &cur_pos);
 191
 192         tv_move_screen(cur_pos.page, cur_pos.line, SEEK_SET);
 193     }
 194     else if (res == TV_MENU_RESULT_MOVE_PAGE)
 195         res = TV_MENU_RESULT_EXIT_MENU;
 196
 197     return res;
 198 }
 199
 200 void tv_add_or_remove_bookmark(void)
 201 {
 202     tv_toggle_bookmark();
 203     bookmarks_changed = true;
 204 }