src/viewer/plain.c

   1 /*
   2    Internal file viewer for the Midnight Commander
   3    Function for plain view
   4
   5    Copyright (C) 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
   6    2004, 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
   7
   8    Written by: 1994, 1995, 1998 Miguel de Icaza
   9    1994, 1995 Janne Kukonlehto
  10    1995 Jakub Jelinek
  11    1996 Joseph M. Hinkle
  12    1997 Norbert Warmuth
  13    1998 Pavel Machek
  14    2004 Roland Illig <roland.illig@gmx.de>
  15    2005 Roland Illig <roland.illig@gmx.de>
  16    2009 Slava Zanko <slavazanko@google.com>
  17    2009 Andrew Borodin <aborodin@vmail.ru>
  18    2009 Ilia Maslakov <il.smind@gmail.com>
  19    2010 Andrew Borodin <aborodin@vmail.ru>
  20
  21    This file is part of the Midnight Commander.
  22
  23    The Midnight Commander is free software; you can redistribute it
  24    and/or modify it under the terms of the GNU General Public License as
  25    published by the Free Software Foundation; either version 2 of the
  26    License, or (at your option) any later version.
  27
  28    The Midnight Commander is distributed in the hope that it will be
  29    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  30    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  31    General Public License for more details.
  32
  33    You should have received a copy of the GNU General Public License
  34    along with this program; if not, write to the Free Software
  35    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  36    MA 02110-1301, USA.
  37  */
  38
  39 #include <config.h>
  40
  41 #include "lib/tty/tty.h"
  42
  43 #include "lib/skin.h"
  44
  45 #include "lib/global.h"
  46 #include "src/main.h"
  47 #include "src/charsets.h"
  48 #include "mcviewer.h"           /* mcview_show_eof */
  49
  50 #include "internal.h"
  51
  52 /*** global variables ****************************************************************************/
  53
  54 /*** file scope macro definitions ****************************************************************/
  55
  56 /*** file scope type declarations ****************************************************************/
  57
  58 /*** file scope variables ************************************************************************/
  59
  60 /*** file scope functions ************************************************************************/
  61
  62 /*** public functions ****************************************************************************/
  63
  64 /* --------------------------------------------------------------------------------------------- */
  65
  66 void
  67 mcview_display_text (mcview_t * view)
  68 {
  69     const screen_dimen left = view->data_area.left;
  70     const screen_dimen top = view->data_area.top;
  71     const screen_dimen width = view->data_area.width;
  72     const screen_dimen height = view->data_area.height;
  73     screen_dimen row = 0, col = 0;
  74     off_t from;
  75     int cw = 1;
  76     int c, prev_ch = 0;
  77     gboolean last_row = TRUE;
  78     struct hexedit_change_node *curr = view->change_list;
  79
  80     mcview_display_clean (view);
  81     mcview_display_ruler (view);
  82
  83     /* Find the first displayable changed byte */
  84     from = view->dpy_start;
  85     while ((curr != NULL) && (curr->offset < from))
  86         curr = curr->next;
  87
  88     while (TRUE)
  89     {
  90         tty_setcolor (NORMAL_COLOR);
  91
  92         if (row >= height)
  93             break;
  94
  95 #ifdef HAVE_CHARSET
  96         if (view->utf8)
  97         {
  98             gboolean read_res = TRUE;
  99
 100             c = mcview_get_utf (view, from, &cw, &read_res);
 101             if (!read_res)
 102                 break;
 103         }
 104         else
 105 #endif
 106         if (!mcview_get_byte (view, from, &c))
 107             break;
 108
 109         last_row = FALSE;
 110         from++;
 111         if (cw > 1)
 112             from += cw - 1;
 113
 114         if (c != '\n' && prev_ch == '\r')
 115         {
 116             if (++row >= height)
 117                 break;
 118
 119             col = 0;
 120             /* tty_print_anychar ('\n'); */
 121         }
 122
 123         prev_ch = c;
 124         if (c == '\r')
 125             continue;
 126
 127         if (c == '\n')
 128         {
 129             col = 0;
 130             row++;
 131             continue;
 132         }
 133
 134         if (col >= width && view->text_wrap_mode)
 135         {
 136             col = 0;
 137             if (++row >= height)
 138                 break;
 139         }
 140
 141         if (c == '\t')
 142         {
 143             col += (option_tab_spacing - col % option_tab_spacing);
 144             if (view->text_wrap_mode && col >= width && width != 0)
 145             {
 146                 row += col / width;
 147                 col %= width;
 148             }
 149             continue;
 150         }
 151
 152         if (view->search_start <= from && from < view->search_end)
 153             tty_setcolor (SELECTED_COLOR);
 154
 155         if ((col >= view->dpy_text_column) && (col - view->dpy_text_column < width))
 156         {
 157             widget_move (view, top + row, left + (col - view->dpy_text_column));
 158 #ifdef HAVE_CHARSET
 159             if (utf8_display)
 160             {
 161                 if (!view->utf8)
 162                     c = convert_from_8bit_to_utf_c ((unsigned char) c, view->converter);
 163                 if (!g_unichar_isprint (c))
 164                     c = '.';
 165             }
 166             else if (view->utf8)
 167                 c = convert_from_utf_to_current_c (c, view->converter);
 168             else
 169 #endif
 170             {
 171                 c = convert_to_display_c (c);
 172
 173                 if (!is_printable (c))
 174                     c = '.';
 175             }
 176
 177             tty_print_anychar (c);
 178         }
 179
 180         col++;
 181
 182 #ifdef HAVE_CHARSET
 183         if (view->utf8)
 184         {
 185             if (g_unichar_iswide (c))
 186                 col++;
 187             else if (g_unichar_iszerowidth (c))
 188                 col--;
 189         }
 190 #endif
 191     }
 192
 193     view->dpy_end = from;
 194     if (mcview_show_eof != NULL && mcview_show_eof[0] != '\0')
 195     {
 196         if (last_row && mcview_get_byte (view, from - 1, &c))
 197             if (c != '\n')
 198                 row--;
 199         while (++row < height)
 200         {
 201             widget_move (view, top + row, left);
 202             tty_print_string (mcview_show_eof);
 203         }
 204     }
 205 }
 206
 207 /* --------------------------------------------------------------------------------------------- */