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
  20    This file is part of the Midnight Commander.
  21
  22    The Midnight Commander is free software; you can redistribute it
  23    and/or modify it under the terms of the GNU General Public License as
  24    published by the Free Software Foundation; either version 2 of the
  25    License, or (at your option) any later version.
  26
  27    The Midnight Commander is distributed in the hope that it will be
  28    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  29    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  30    General Public License for more details.
  31
  32    You should have received a copy of the GNU General Public License
  33    along with this program; if not, write to the Free Software
  34    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  35    MA 02110-1301, USA.
  36  */
  37
  38 #include <config.h>
  39
  40 #include "../src/global.h"
  41 #include "../src/main.h"
  42 #include "../src/charsets.h"
  43 #include "../src/tty/tty.h"
  44 #include "../src/skin/skin.h"
  45 #include "internal.h"
  46
  47 /*** global variables ****************************************************************************/
  48
  49 /*** file scope macro definitions ****************************************************************/
  50
  51 /*** file scope type declarations ****************************************************************/
  52
  53 /*** file scope variables ************************************************************************/
  54
  55 /*** file scope functions ************************************************************************/
  56
  57 /*** public functions ****************************************************************************/
  58
  59 /* --------------------------------------------------------------------------------------------- */
  60
  61 void
  62 mcview_display_text (mcview_t * view)
  63 {
  64     const screen_dimen left = view->data_area.left;
  65     const screen_dimen top = view->data_area.top;
  66     const screen_dimen width = view->data_area.width;
  67     const screen_dimen height = view->data_area.height;
  68     screen_dimen row, col;
  69     off_t from;
  70     int cw = 1;
  71     int c, prev_ch;
  72     gboolean read_res = TRUE;
  73     struct hexedit_change_node *curr = view->change_list;
  74
  75     mcview_display_clean (view);
  76     mcview_display_ruler (view);
  77
  78     /* Find the first displayable changed byte */
  79     from = view->dpy_start;
  80     while (curr && (curr->offset < from)) {
  81         curr = curr->next;
  82     }
  83
  84     tty_setcolor (NORMAL_COLOR);
  85     for (row = 0, col = 0; row < height;) {
  86 #ifdef HAVE_CHARSET
  87         if (view->utf8) {
  88             c = mcview_get_utf (view, from, &cw, &read_res);
  89             if (!read_res)
  90                 break;
  91         } else
  92 #endif
  93         {
  94             if (! mcview_get_byte (view, from, &c))
  95                 break;
  96         }
  97         from++;
  98         if (cw > 1)
  99             from += cw - 1;
 100
 101         if (c != '\n' && prev_ch == '\r') {
 102             col = 0;
 103             row++;
 104             tty_print_anychar ('\n');
 105         }
 106
 107         prev_ch = c;
 108         if (c == '\r')
 109             continue;
 110
 111         if ((c == '\n') || (col >= width && view->text_wrap_mode)) {
 112             col = 0;
 113             row++;
 114             if (c == '\n' || row >= height)
 115                 continue;
 116         }
 117
 118         if (c == '\t') {
 119             off_t line, column;
 120             mcview_offset_to_coord (view, &line, &column, from);
 121             col += (8 - column % 8);
 122             if (view->text_wrap_mode && col >= width && width != 0) {
 123                 row += col / width;
 124                 col %= width;
 125             }
 126             continue;
 127         }
 128
 129         if (view->search_start <= from && from < view->search_end) {
 130             tty_setcolor (SELECTED_COLOR);
 131         }
 132
 133         if (col >= view->dpy_text_column && col - view->dpy_text_column < width) {
 134             widget_move (view, top + row, left + (col - view->dpy_text_column));
 135 #ifdef HAVE_CHARSET
 136             if (utf8_display) {
 137                 if (!view->utf8) {
 138                     c = convert_from_8bit_to_utf_c (c, view->converter);
 139                 }
 140                 if (!g_unichar_isprint (c))
 141                     c = '.';
 142             } else {
 143                 if (view->utf8) {
 144                     c = convert_from_utf_to_current_c (c, view->converter);
 145                 } else {
 146 #endif
 147                     c = convert_to_display_c (c);
 148 #ifdef HAVE_CHARSET
 149                 }
 150             }
 151 #endif
 152             tty_print_anychar (c);
 153         }
 154         col++;
 155         tty_setcolor (NORMAL_COLOR);
 156     }
 157     view->dpy_end = from;
 158 }
 159
 160 /* --------------------------------------------------------------------------------------------- */