apps/plugins/text_viewer/tv_preferences.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_preferences.h"
  25
  26 /* global preferences */
  27 static struct tv_preferences prefs;
  28 struct tv_preferences *preferences = &prefs;
  29
  30 static int listner_count = 0;
  31
  32 #define TV_MAX_LISTNERS 4
  33 static void (*listners[TV_MAX_LISTNERS])(const struct tv_preferences *oldp);
  34
  35 static void tv_notify_change_preferences(const struct tv_preferences *oldp)
  36 {
  37     int i;
  38
  39     /*
  40      * the following items do not check.
  41      *   - alignment
  42      *   - horizontal_scroll_mode
  43      *   - vertical_scroll_mode
  44      *   - page_mode
  45      *   - font
  46      *   - autoscroll_speed
  47      *   - narrow_mode
  48      */
  49     if ((oldp == NULL)                                                    ||
  50         (oldp->word_mode            != preferences->word_mode)            ||
  51         (oldp->line_mode            != preferences->line_mode)            ||
  52         (oldp->windows              != preferences->windows)              ||
  53         (oldp->horizontal_scrollbar != preferences->horizontal_scrollbar) ||
  54         (oldp->vertical_scrollbar   != preferences->vertical_scrollbar)   ||
  55         (oldp->encoding             != preferences->encoding)             ||
  56         (oldp->indent_spaces        != preferences->indent_spaces)        ||
  57 #ifdef HAVE_LCD_BITMAP
  58         (oldp->header_mode          != preferences->header_mode)          ||
  59         (oldp->footer_mode          != preferences->footer_mode)          ||
  60         (rb->strcmp(oldp->font_name, preferences->font_name))             ||
  61 #endif
  62         (rb->strcmp(oldp->file_name, preferences->file_name)))
  63     {
  64         for (i = 0; i < listner_count; i++)
  65             listners[i](oldp);
  66     }
  67 }
  68
  69 static void tv_check_header_and_footer(void)
  70 {
  71     if (rb->global_settings->statusbar != STATUSBAR_TOP)
  72     {
  73         if (preferences->header_mode == HD_SBAR)
  74             preferences->header_mode = HD_NONE;
  75         else if (preferences->header_mode == HD_BOTH)
  76             preferences->header_mode = HD_PATH;
  77     }
  78     if (rb->global_settings->statusbar != STATUSBAR_BOTTOM)
  79     {
  80         if (preferences->footer_mode == FT_SBAR)
  81             preferences->footer_mode = FT_NONE;
  82         else if (preferences->footer_mode == FT_BOTH)
  83             preferences->footer_mode = FT_PAGE;
  84     }
  85 }
  86
  87 void tv_set_preferences(const struct tv_preferences *new_prefs)
  88 {
  89     static struct tv_preferences old_prefs;
  90     struct tv_preferences *oldp = NULL;
  91     static bool is_initialized = false;
  92
  93     if (is_initialized)
  94         tv_copy_preferences((oldp = &old_prefs));
  95     is_initialized = true;
  96
  97     rb->memcpy(preferences, new_prefs, sizeof(struct tv_preferences));
  98     tv_check_header_and_footer();
  99     tv_notify_change_preferences(oldp);
 100 }
 101
 102 void tv_copy_preferences(struct tv_preferences *copy_prefs)
 103 {
 104     rb->memcpy(copy_prefs, preferences, sizeof(struct tv_preferences));
 105 }
 106
 107 void tv_set_default_preferences(struct tv_preferences *p)
 108 {
 109     p->word_mode = WRAP;
 110     p->line_mode = NORMAL;
 111     p->windows = 1;
 112     p->alignment = LEFT;
 113     p->horizontal_scroll_mode = SCREEN;
 114     p->vertical_scroll_mode = PAGE;
 115     p->page_mode = NO_OVERLAP;
 116     p->horizontal_scrollbar = SB_OFF;
 117     p->vertical_scrollbar = SB_OFF;
 118 #ifdef HAVE_LCD_BITMAP
 119     p->header_mode = HD_BOTH;
 120     p->footer_mode = FT_BOTH;
 121     rb->strlcpy(p->font_name, rb->global_settings->font_file, MAX_PATH);
 122     p->font = rb->font_get(FONT_UI);
 123 #else
 124     p->header_mode = HD_NONE;
 125     p->footer_mode = FT_NONE;
 126 #endif
 127     p->autoscroll_speed = 1;
 128     p->narrow_mode = NM_PAGE;
 129     p->indent_spaces = 2;
 130     /* Set codepage to system default */
 131     p->encoding = rb->global_settings->default_codepage;
 132     p->file_name[0] = '\0';
 133 }
 134
 135 void tv_add_preferences_change_listner(void (*listner)(const struct tv_preferences *oldp))
 136 {
 137     if (listner_count < TV_MAX_LISTNERS)
 138         listners[listner_count++] = listner;
 139 }