void
mcview_display_hex (mcview_t * view)
{
const screen_dimen top = view->data_area.top;
const screen_dimen left = view->data_area.left;
const screen_dimen height = view->data_area.height;
const screen_dimen width = view->data_area.width;
const int ngroups = view->bytes_per_line / 4;
const screen_dimen text_start = 8 + 13 * ngroups + ((width < 80) ? 0 : (ngroups - 1 + 1));
/* 8 characters are used for the file offset, and every hex group
* takes 13 characters. On "big" screens, the groups are separated
* by an extra vertical line, and there is an extra space before the
* text column.
*/
screen_dimen row;
off_t from;
int c;
mark_t boldflag = MARK_NORMAL;
struct hexedit_change_node *curr = view->change_list;
#ifdef HAVE_CHARSET
int ch = 0;
#endif /* HAVE_CHARSET */
char hex_buff[10]; /* A temporary buffer for sprintf and mvwaddstr */
int bytes; /* Number of bytes already printed on the line */
mcview_display_clean (view);
/* Find the first displayable changed byte */
from = view->dpy_start;
while (curr && (curr->offset < from))
{
curr = curr->next;
}
for (row = 0; mcview_get_byte (view, from, NULL) == TRUE && row < height; row++)
{
screen_dimen col = 0;
size_t i;
col = 0;
/* Print the hex offset */
g_snprintf (hex_buff, sizeof (hex_buff), "%08" PRIXMAX " ", (uintmax_t) from);
widget_move (view, top + row, left);
tty_setcolor (VIEW_BOLD_COLOR);
for (i = 0; col < width && hex_buff[i] != '\0'; i++)
{
tty_print_char (hex_buff[i]);
/* tty_print_char(hex_buff[i]); */
col += 1;
}
tty_setcolor (VIEW_NORMAL_COLOR);
for (bytes = 0; bytes < view->bytes_per_line; bytes++, from++)
{
#ifdef HAVE_CHARSET
if (view->utf8)
{
int cw = 1;
gboolean read_res = TRUE;
ch = mcview_get_utf (view, from, &cw, &read_res);
if (!read_res)
break;
/* char width is greater 0 bytes */
if (cw != 0)
{
int cnt;
char corr_buf[UTF8_CHAR_LEN + 1];
struct hexedit_change_node *corr = curr;
int res;
res = g_unichar_to_utf8 (ch, (char *) corr_buf);
for (cnt = 0; cnt < cw; cnt++)
{
if (curr != NULL && from + cnt == curr->offset)
{
/* replace only changed bytes in array of multibyte char */
corr_buf[cnt] = curr->value;
curr = curr->next;
}
}
corr_buf[res] = '\0';
/* Determine the state of the current multibyte char */
ch = utf8_to_int ((char *) corr_buf, &cw, &read_res);
curr = corr;
}
}
#endif /* HAVE_CHARSET */
if (!mcview_get_byte (view, from, &c))
break;
/* Save the cursor position for mcview_place_cursor() */
if (from == view->hex_cursor && !view->hexview_in_text)
{
view->cursor_row = row;
view->cursor_col = col;
}
/* Determine the state of the current byte */
boldflag = mcview_hex_calculate_boldflag (view, from, curr);
/* Determine the value of the current byte */
if (curr != NULL && from == curr->offset)
{
c = curr->value;
curr = curr->next;
}
/* Select the color for the hex number */
tty_setcolor (boldflag == MARK_NORMAL ? VIEW_NORMAL_COLOR :
boldflag == MARK_SELECTED ? VIEW_BOLD_COLOR :
boldflag == MARK_CHANGED ? VIEW_UNDERLINED_COLOR :
/* boldflag == MARK_CURSOR */
view->hexview_in_text ? VIEW_SELECTED_COLOR : VIEW_UNDERLINED_COLOR);
/* Print the hex number */
widget_move (view, top + row, left + col);
if (col < width)
{
tty_print_char (hex_char[c / 16]);
col += 1;
}
if (col < width)
{
tty_print_char (hex_char[c % 16]);
col += 1;
}
/* Print the separator */
tty_setcolor (VIEW_NORMAL_COLOR);
if (bytes != view->bytes_per_line - 1)
{
if (col < width)
{
tty_print_char (' ');
col += 1;
}
/* After every four bytes, print a group separator */
if (bytes % 4 == 3)
{
if (view->data_area.width >= 80 && col < width)
{
tty_print_one_vline (TRUE);
col += 1;
}
if (col < width)
{
tty_print_char (' ');
col += 1;
}
}
}
/* Select the color for the character; this differs from the
* hex color when boldflag == MARK_CURSOR */
tty_setcolor (boldflag == MARK_NORMAL ? VIEW_NORMAL_COLOR :
boldflag == MARK_SELECTED ? VIEW_BOLD_COLOR :
boldflag == MARK_CHANGED ? VIEW_UNDERLINED_COLOR :
/* boldflag == MARK_CURSOR */
view->hexview_in_text ? VIEW_SELECTED_COLOR : MARKED_SELECTED_COLOR);
#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)
ch = convert_from_utf_to_current_c (ch, view->converter);
else
#endif
{
#ifdef HAVE_CHARSET
c = convert_to_display_c (c);
#endif
if (!is_printable (c))
c = '.';
}
/* Print corresponding character on the text side */
if (text_start + bytes < width)
{
widget_move (view, top + row, left + text_start + bytes);
#ifdef HAVE_CHARSET
if (view->utf8)
tty_print_anychar (ch);
else
#endif
tty_print_char (c);
}
/* Save the cursor position for mcview_place_cursor() */
if (from == view->hex_cursor && view->hexview_in_text)
{
view->cursor_row = row;
view->cursor_col = text_start + bytes;
}
}
}
/* Be polite to the other functions */
tty_setcolor (VIEW_NORMAL_COLOR);
mcview_place_cursor (view);
view->dpy_end = from;
}
void
mcview_display_hex (WView * view)
{
const screen_dimen top = view->data_area.top;
const screen_dimen left = view->data_area.left;
const screen_dimen height = view->data_area.height;
const screen_dimen width = view->data_area.width;
const int ngroups = view->bytes_per_line / 4;
/* 8 characters are used for the file offset, and every hex group
* takes 13 characters. Starting at width of 80 columns, the groups
* are separated by an extra vertical line. Starting at width of 81,
* there is an extra space before the text column. There is always a
* mostly empty column on the right, to allow overflowing CJKs.
*/
const screen_dimen text_start = 8 + 13 * ngroups +
((width < 80) ? 0 : (width == 80) ? (ngroups - 1) : (ngroups - 1 + 1));
int row;
off_t from;
mark_t boldflag_byte = MARK_NORMAL;
mark_t boldflag_char = MARK_NORMAL;
struct hexedit_change_node *curr = view->change_list;
#ifdef HAVE_CHARSET
int cont_bytes = 0; /* number of continuation bytes remanining from current UTF-8 */
gboolean cjk_right = FALSE; /* whether the second byte of a CJK is to be processed */
#endif /* HAVE_CHARSET */
gboolean utf8_changed = FALSE; /* whether any of the bytes in the UTF-8 were changed */
char hex_buff[10]; /* A temporary buffer for sprintf and mvwaddstr */
mcview_display_clean (view);
/* Find the first displayable changed byte */
/* In UTF-8 mode, go back by 1 or maybe 2 lines to handle continuation bytes properly. */
from = view->dpy_start;
row = 0;
#ifdef HAVE_CHARSET
if (view->utf8)
{
if (from >= view->bytes_per_line)
{
row--;
from -= view->bytes_per_line;
}
if (view->bytes_per_line == 4 && from >= view->bytes_per_line)
{
row--;
from -= view->bytes_per_line;
}
}
#endif /* HAVE_CHARSET */
while (curr && (curr->offset < from))
{
curr = curr->next;
}
for (; mcview_get_byte (view, from, NULL) && row < (int) height; row++)
{
screen_dimen col = 0;
size_t i;
int bytes; /* Number of bytes already printed on the line */
/* Print the hex offset */
if (row >= 0)
{
g_snprintf (hex_buff, sizeof (hex_buff), "%08" PRIXMAX " ", (uintmax_t) from);
widget_move (view, top + row, left);
tty_setcolor (VIEW_BOLD_COLOR);
for (i = 0; col < width && hex_buff[i] != '\0'; col++, i++)
tty_print_char (hex_buff[i]);
tty_setcolor (VIEW_NORMAL_COLOR);
}
for (bytes = 0; bytes < view->bytes_per_line; bytes++, from++)
{
int c;
#ifdef HAVE_CHARSET
int ch = 0;
if (view->utf8)
{
struct hexedit_change_node *corr = curr;
if (cont_bytes != 0)
{
/* UTF-8 continuation bytes, print a space (with proper attributes)... */
cont_bytes--;
ch = ' ';
if (cjk_right)
{
/* ... except when it'd wipe out the right half of a CJK, then print nothing */
cjk_right = FALSE;
ch = -1;
}
}
else
{
int j;
gchar utf8buf[UTF8_CHAR_LEN + 1];
int res;
int first_changed = -1;
for (j = 0; j < UTF8_CHAR_LEN; j++)
{
if (mcview_get_byte (view, from + j, &res))
utf8buf[j] = res;
else
{
utf8buf[j] = '\0';
break;
}
if (curr != NULL && from + j == curr->offset)
{
utf8buf[j] = curr->value;
if (first_changed == -1)
first_changed = j;
}
if (curr != NULL && from + j >= curr->offset)
curr = curr->next;
}
utf8buf[UTF8_CHAR_LEN] = '\0';
/* Determine the state of the current multibyte char */
ch = g_utf8_get_char_validated (utf8buf, -1);
if (ch == -1 || ch == -2)
{
ch = '.';
}
else
{
gchar *next_ch;
next_ch = g_utf8_next_char (utf8buf);
cont_bytes = next_ch - utf8buf - 1;
if (g_unichar_iswide (ch))
cjk_right = TRUE;
}
utf8_changed = (first_changed >= 0 && first_changed <= cont_bytes);
curr = corr;
}
}
#endif /* HAVE_CHARSET */
/* For negative rows, the only thing we care about is overflowing
* UTF-8 continuation bytes which were handled above. */
if (row < 0)
{
if (curr != NULL && from == curr->offset)
curr = curr->next;
continue;
}
if (!mcview_get_byte (view, from, &c))
break;
/* Save the cursor position for mcview_place_cursor() */
if (from == view->hex_cursor && !view->hexview_in_text)
{
view->cursor_row = row;
view->cursor_col = col;
}
/* Determine the state of the current byte */
boldflag_byte = mcview_hex_calculate_boldflag (view, from, curr, FALSE);
boldflag_char = mcview_hex_calculate_boldflag (view, from, curr, utf8_changed);
/* Determine the value of the current byte */
if (curr != NULL && from == curr->offset)
{
c = curr->value;
curr = curr->next;
}
/* Select the color for the hex number */
tty_setcolor (boldflag_byte == MARK_NORMAL ? VIEW_NORMAL_COLOR :
boldflag_byte == MARK_SELECTED ? VIEW_BOLD_COLOR :
boldflag_byte == MARK_CHANGED ? VIEW_UNDERLINED_COLOR :
/* boldflag_byte == MARK_CURSOR */
view->hexview_in_text ? VIEW_SELECTED_COLOR : VIEW_UNDERLINED_COLOR);
/* Print the hex number */
widget_move (view, top + row, left + col);
if (col < width)
{
tty_print_char (hex_char[c / 16]);
col += 1;
}
if (col < width)
{
tty_print_char (hex_char[c % 16]);
col += 1;
}
/* Print the separator */
tty_setcolor (VIEW_NORMAL_COLOR);
if (bytes != view->bytes_per_line - 1)
{
if (col < width)
{
tty_print_char (' ');
col += 1;
}
/* After every four bytes, print a group separator */
if (bytes % 4 == 3)
{
if (view->data_area.width >= 80 && col < width)
{
tty_print_one_vline (TRUE);
col += 1;
}
if (col < width)
{
tty_print_char (' ');
col += 1;
}
}
}
/* Select the color for the character; this differs from the
* hex color when boldflag == MARK_CURSOR */
tty_setcolor (boldflag_char == MARK_NORMAL ? VIEW_NORMAL_COLOR :
boldflag_char == MARK_SELECTED ? VIEW_BOLD_COLOR :
boldflag_char == MARK_CHANGED ? VIEW_UNDERLINED_COLOR :
/* boldflag_char == MARK_CURSOR */
view->hexview_in_text ? VIEW_SELECTED_COLOR : MARKED_SELECTED_COLOR);
#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)
ch = convert_from_utf_to_current_c (ch, view->converter);
else
#endif
{
#ifdef HAVE_CHARSET
c = convert_to_display_c (c);
#endif
if (!is_printable (c))
c = '.';
}
/* Print corresponding character on the text side */
if (text_start + bytes < width)
{
widget_move (view, top + row, left + text_start + bytes);
#ifdef HAVE_CHARSET
if (view->utf8)
tty_print_anychar (ch);
else
#endif
tty_print_char (c);
}
/* Save the cursor position for mcview_place_cursor() */
if (from == view->hex_cursor && view->hexview_in_text)
{
view->cursor_row = row;
view->cursor_col = text_start + bytes;
}
}
}
/* Be polite to the other functions */
tty_setcolor (VIEW_NORMAL_COLOR);
mcview_place_cursor (view);
view->dpy_end = from;
}