void
mcview_display_nroff (mcview_t * view)
{
const screen_dimen left = view->data_area.left;
const screen_dimen top = view->data_area.top;
const screen_dimen width = view->data_area.width;
const screen_dimen height = view->data_area.height;
screen_dimen row, col;
off_t from;
int cw = 1;
int c;
int c_prev = 0;
int c_next = 0;
struct hexedit_change_node *curr = view->change_list;
mcview_display_clean (view);
mcview_display_ruler (view);
/* Find the first displayable changed byte */
from = view->dpy_start;
while (curr && (curr->offset < from))
{
curr = curr->next;
}
tty_setcolor (NORMAL_COLOR);
for (row = 0, col = 0; row < height;)
{
#ifdef HAVE_CHARSET
if (view->utf8)
{
gboolean read_res = TRUE;
c = mcview_get_utf (view, from, &cw, &read_res);
if (!read_res)
break;
}
else
#endif
{
if (!mcview_get_byte (view, from, &c))
break;
}
from++;
if (cw > 1)
from += cw - 1;
if (c == '\b')
{
if (from > 1)
{
#ifdef HAVE_CHARSET
if (view->utf8)
{
gboolean read_res;
c_next = mcview_get_utf (view, from, &cw, &read_res);
}
else
#endif
mcview_get_byte (view, from, &c_next);
}
if (g_unichar_isprint (c_prev) && g_unichar_isprint (c_next)
&& (c_prev == c_next || c_prev == '_' || (c_prev == '+' && c_next == 'o')))
{
if (col == 0)
{
if (row == 0)
{
/* We're inside an nroff character sequence at the
* beginning of the screen -- just skip the
* backspace and continue with the next character. */
continue;
}
row--;
col = width;
}
col--;
if (c_prev == '_'
&& (c_next != '_' || mcview_count_backspaces (view, from + 1) == 1))
tty_setcolor (VIEW_UNDERLINED_COLOR);
else
tty_setcolor (VIEW_BOLD_COLOR);
continue;
}
}
if ((c == '\n') || (col >= width && view->text_wrap_mode))
{
col = 0;
row++;
if (c == '\n' || row >= height)
continue;
}
if (c == '\r')
{
mcview_get_byte_indexed (view, from, 1, &c);
if (c == '\r' || c == '\n')
continue;
col = 0;
row++;
continue;
}
if (c == '\t')
{
off_t line, column;
mcview_offset_to_coord (view, &line, &column, from);
col += (option_tab_spacing - col % option_tab_spacing);
if (view->text_wrap_mode && col >= width && width != 0)
{
row += col / width;
col %= width;
}
continue;
}
if (view->search_start <= from && from < view->search_end)
{
tty_setcolor (SELECTED_COLOR);
}
c_prev = c;
if ((off_t) col >= view->dpy_text_column
&& (off_t) col - view->dpy_text_column < (off_t) width)
{
widget_move (view, top + row, left + ((off_t) col - view->dpy_text_column));
#ifdef HAVE_CHARSET
if (mc_global.utf8_display)
{
if (!view->utf8)
{
c = convert_from_8bit_to_utf_c ((unsigned char) c, view->converter);
}
if (!g_unichar_isprint (c))
c = '.';
}
else if (view->utf8)
c = convert_from_utf_to_current_c (c, view->converter);
else
c = convert_to_display_c (c);
#endif
tty_print_anychar (c);
}
col++;
#ifdef HAVE_CHARSET
if (view->utf8)
{
if (g_unichar_iswide (c))
col++;
else if (g_unichar_iszerowidth (c))
col--;
}
#endif
tty_setcolor (NORMAL_COLOR);
}
view->dpy_end = from;
}
/**
* In both wrap and unwrap modes, dpy_start points to the beginning of the paragraph.
*
* In unwrap mode, start displaying from this position, probably applying an additional horizontal
* scroll.
*
* In wrap mode, an additional dpy_paragraph_skip_lines lines are skipped from the top of this
* paragraph. dpy_state_top contains the position and parser-formatter state corresponding to the
* top left corner so we can just start rendering from here. Unless dpy_wrap_dirty is set in which
* case dpy_state_top is invalid and we need to recompute first.
*/
void
mcview_display_text (WView * view)
{
const screen_dimen left = view->data_area.left;
const screen_dimen top = view->data_area.top;
const screen_dimen height = view->data_area.height;
int row;
mcview_state_machine_t state;
gboolean again;
do
{
int n;
again = FALSE;
mcview_display_clean (view);
mcview_display_ruler (view);
if (!view->text_wrap_mode)
mcview_state_machine_init (&state, view->dpy_start);
else
{
mcview_wrap_fixup (view);
state = view->dpy_state_top;
}
for (row = 0; row < (int) height; row += n)
{
n = mcview_display_paragraph (view, &state, row);
if (n == 0)
{
/* In the rare case that displaying didn't start at the beginning
* of the file, yet there are some empty lines at the bottom,
* scroll the file and display again. This happens when e.g. the
* window is made bigger, or the file becomes shorter due to
* charset change or enabling nroff. */
if ((view->text_wrap_mode ? view->dpy_state_top.offset : view->dpy_start) > 0)
{
mcview_ascii_move_up (view, height - row);
again = TRUE;
}
break;
}
}
}
while (again);
view->dpy_end = state.offset;
view->dpy_state_bottom = state;
tty_setcolor (VIEW_NORMAL_COLOR);
if (mcview_show_eof != NULL && mcview_show_eof[0] != '\0')
while (row < (int) height)
{
widget_move (view, top + row, left);
/* TODO: should make it no wider than the viewport */
tty_print_string (mcview_show_eof);
row++;
}
}
void
mcview_display_text (mcview_t * view)
{
const screen_dimen left = view->data_area.left;
const screen_dimen top = view->data_area.top;
const screen_dimen width = view->data_area.width;
const screen_dimen height = view->data_area.height;
screen_dimen row = 0, col = 0;
off_t from;
int cw = 1;
int c, prev_ch = 0;
gboolean last_row = TRUE;
struct hexedit_change_node *curr = view->change_list;
mcview_display_clean (view);
mcview_display_ruler (view);
/* Find the first displayable changed byte */
from = view->dpy_start;
while ((curr != NULL) && (curr->offset < from))
curr = curr->next;
while (TRUE)
{
tty_setcolor (NORMAL_COLOR);
if (row >= height)
break;
#ifdef HAVE_CHARSET
if (view->utf8)
{
gboolean read_res = TRUE;
c = mcview_get_utf (view, from, &cw, &read_res);
if (!read_res)
break;
}
else
#endif
if (!mcview_get_byte (view, from, &c))
break;
last_row = FALSE;
from++;
if (cw > 1)
from += cw - 1;
if (c != '\n' && prev_ch == '\r')
{
if (++row >= height)
break;
col = 0;
/* tty_print_anychar ('\n'); */
}
prev_ch = c;
if (c == '\r')
continue;
if (c == '\n')
{
col = 0;
row++;
continue;
}
if (col >= width && view->text_wrap_mode)
{
col = 0;
if (++row >= height)
break;
}
if (c == '\t')
{
col += (option_tab_spacing - col % option_tab_spacing);
if (view->text_wrap_mode && col >= width && width != 0)
{
row += col / width;
col %= width;
}
continue;
}
if (view->search_start <= from && from < view->search_end)
tty_setcolor (SELECTED_COLOR);
if (((off_t) col >= view->dpy_text_column)
&& ((off_t) col - view->dpy_text_column < (off_t) width))
{
widget_move (view, top + row, left + ((off_t) col - view->dpy_text_column));
#ifdef HAVE_CHARSET
if (mc_global.utf8_display)
{
if (!view->utf8)
c = convert_from_8bit_to_utf_c ((unsigned char) c, view->converter);
if (!g_unichar_isprint (c))
c = '.';
}
else if (view->utf8)
c = convert_from_utf_to_current_c (c, view->converter);
else
#endif
{
#ifdef HAVE_CHARSET
c = convert_to_display_c (c);
#endif
if (!is_printable (c))
c = '.';
}
tty_print_anychar (c);
}
col++;
#ifdef HAVE_CHARSET
if (view->utf8)
{
if (g_unichar_iswide (c))
col++;
else if (g_unichar_iszerowidth (c))
col--;
}
#endif
}
view->dpy_end = from;
if (mcview_show_eof != NULL && mcview_show_eof[0] != '\0')
{
if (last_row && mcview_get_byte (view, from - 1, &c))
if (c != '\n')
row--;
while (++row < height)
{
widget_move (view, top + row, left);
tty_print_string (mcview_show_eof);
}
}
}
