static inline unsigned
unicode_char_width(gunichar ch)
{
#if GLIB_CHECK_VERSION(2,14,0)
if (g_unichar_iszerowidth(ch))
return 0;
#endif
if (g_unichar_iswide(ch))
return 2;
return 1;
}
/*
* Find out how many columns an UTF-8 string occupies on the screen
*/
int
nmc_string_screen_width (const char *start, const char *end)
{
int width = 0;
if (end == NULL)
end = start + strlen (start);
while (start < end) {
width += g_unichar_iswide (g_utf8_get_char (start)) ? 2 : g_unichar_iszerowidth (g_utf8_get_char (start)) ? 0 : 1;
start = g_utf8_next_char (start);
}
return width;
}
static int
mcview_wcwidth (const WView * view, int c)
{
#ifdef HAVE_CHARSET
if (view->utf8)
{
if (g_unichar_iswide (c))
return 2;
if (g_unichar_iszerowidth (c))
return 0;
}
#else
(void) view;
(void) c;
#endif /* HAVE_CHARSET */
return 1;
}
/*
* Find out how many columns an UTF-8 string occupies on the screen.
*/
int
nmc_string_screen_width (const char *start, const char *end)
{
int width = 0;
const char *p = start;
if (end == NULL)
end = start + strlen (start);
while (p < end) {
width += g_unichar_iswide (g_utf8_get_char (p)) ? 2 : g_unichar_iszerowidth (g_utf8_get_char (p)) ? 0 : 1;
p = g_utf8_next_char (p);
}
/* Subtract color escape sequences as they don't occupy space. */
return width - nmc_count_color_escape_chars (start, NULL);
}
/**
* nmt_newt_text_width
* @str: a UTF-8 string
*
* Computes the width (in terminal columns) of @str.
*
* Returns: the width of @str
*/
int
nmt_newt_text_width (const char *str)
{
int width;
gunichar ch;
for (width = 0; *str; str = g_utf8_next_char (str)) {
ch = g_utf8_get_char (str);
/* Based on _vte_iso2022_unichar_width */
if (G_LIKELY (ch < 0x80))
width += 1;
else if (G_UNLIKELY (g_unichar_iszerowidth (ch)))
width += 0;
else if (G_UNLIKELY (g_unichar_iswide (ch)))
width += 2;
else
width += 1;
}
return width;
}
void
tty_print_anychar (int c)
{
unsigned char str[6 + 1];
if (mc_global.utf8_display || c > 255)
{
int res;
res = g_unichar_to_utf8 (c, (char *) str);
if (res == 0)
{
if (yx_in_screen (mc_curs_row, mc_curs_col))
addch ('.');
mc_curs_col++;
}
else
{
const char *s;
str[res] = '\0';
s = str_term_form ((char *) str);
if (yx_in_screen (mc_curs_row, mc_curs_col))
addstr (s);
if (g_unichar_iswide (c))
mc_curs_col += 2;
else if (!g_unichar_iszerowidth (c))
mc_curs_col++;
}
}
else
{
if (yx_in_screen (mc_curs_row, mc_curs_col))
addch (c);
mc_curs_col++;
}
}
static int
mcview_char_display (const WView * view, int c, char *s)
{
#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 = '.';
return g_unichar_to_utf8 (c, s);
}
if (view->utf8)
{
if (g_unichar_iswide (c))
{
s[0] = s[1] = '.';
return 2;
}
if (g_unichar_iszerowidth (c))
return 0;
/* TODO the is_printable check below will be broken for this */
c = convert_from_utf_to_current_c (c, view->converter);
}
else
{
/* TODO the is_printable check below will be broken for this */
c = convert_to_display_c (c);
}
#else
(void) view;
#endif /* HAVE_CHARSET */
/* TODO this is very-very buggy by design: ticket 3257 comments 0-1 */
if (!is_printable (c))
c = '.';
*s = c;
return 1;
}
static int vt100_is_zero_width(uint32_t codepoint)
{
/* we want soft hyphens to actually be zero width, because terminals don't
* do word wrapping */
return g_unichar_iszerowidth(codepoint) || codepoint == 0xAD;
}
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;
}
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);
}
}
}