/**
* Move up.
*
* Unwrap mode: Piece of cake. Wrap mode: If we'd walk back more than the current line offset
* within the paragraph, we need to jump back to the previous paragraph and compute its height to
* see if we start from that paragraph, and repeat this if necessary. Once we're within the desired
* paragraph, we still need to format it from its beginning to know the state.
*
* See the top of this file for comments about MAX_BACKWARDS_WALK_IN_PARAGRAPH.
*
* force_max is a nice protection against the rare extreme case that the file underneath us
* changes, we don't want to endlessly consume a file of maybe full of zeros upon moving upwards.
*/
void
mcview_ascii_move_up (WView * view, off_t lines)
{
if (!view->text_wrap_mode)
{
while (lines-- != 0)
view->dpy_start = mcview_bol (view, view->dpy_start - 1, 0);
view->dpy_paragraph_skip_lines = 0;
view->dpy_wrap_dirty = TRUE;
}
else
{
int i;
while (lines > view->dpy_paragraph_skip_lines)
{
/* We need to go back to the previous paragraph. */
if (view->dpy_start == 0)
{
/* Oops, we're already in the first paragraph. */
view->dpy_paragraph_skip_lines = 0;
mcview_state_machine_init (&view->dpy_state_top, 0);
return;
}
lines -= view->dpy_paragraph_skip_lines;
view->force_max = view->dpy_start;
view->dpy_start =
mcview_bol (view, view->dpy_start - 1,
view->dpy_start - MAX_BACKWARDS_WALK_IN_PARAGRAPH);
mcview_state_machine_init (&view->dpy_state_top, view->dpy_start);
/* This is a tricky way of denoting that we're at the end of the paragraph.
* Normally we'd jump to the next paragraph and reset paragraph_skip_lines. But for
* walking backwards this is exactly what we need. */
view->dpy_paragraph_skip_lines =
mcview_display_paragraph (view, &view->dpy_state_top, view->data_area.height);
view->force_max = -1;
}
/* Okay, we have have dpy_start pointing to the desired paragraph, and we still need to
* walk back "lines" lines from the current "dpy_paragraph_skip_lines" offset. We can't do
* that, so walk from the beginning of the paragraph. */
mcview_state_machine_init (&view->dpy_state_top, view->dpy_start);
view->dpy_paragraph_skip_lines -= lines;
for (i = 0; i < view->dpy_paragraph_skip_lines; i++)
mcview_display_line (view, &view->dpy_state_top, -1, NULL, NULL);
}
}
void
mcview_toggle_wrap_mode (mcview_t * view)
{
if (view->text_wrap_mode)
view->dpy_start = mcview_bol (view, view->dpy_start, 0);
view->text_wrap_mode = !view->text_wrap_mode;
view->dpy_bbar_dirty = TRUE;
view->dirty++;
}
void
mcview_moveto_eol (mcview_t * view)
{
off_t bol;
if (view->hex_mode)
{
off_t filesize;
bol = mcview_offset_rounddown (view->hex_cursor, view->bytes_per_line);
if (mcview_get_byte_indexed (view, bol, view->bytes_per_line - 1, NULL) == TRUE)
{
view->hex_cursor = bol + view->bytes_per_line - 1;
}
else
{
filesize = mcview_get_filesize (view);
view->hex_cursor = mcview_offset_doz (filesize, 1);
}
}
else
{
off_t eol;
bol = mcview_bol (view, view->dpy_start, 0);
eol = mcview_eol (view, view->dpy_start, mcview_get_filesize (view));
if (!view->utf8)
{
if (eol > bol)
view->dpy_text_column = eol - bol;
}
else
{
char *str = NULL;
switch (view->datasource)
{
case DS_STDIO_PIPE:
case DS_VFS_PIPE:
str = mcview_get_ptr_growing_buffer (view, bol);
break;
case DS_FILE:
str = mcview_get_ptr_file (view, bol);
break;
case DS_STRING:
str = mcview_get_ptr_string (view, bol);
break;
case DS_NONE:
break;
}
if (str != NULL && eol > bol)
view->dpy_text_column = g_utf8_strlen (str, eol - bol);
else
view->dpy_text_column = eol - bol;
}
view->dpy_text_column = max (0, view->dpy_text_column - view->data_area.width);
}
mcview_movement_fixups (view, FALSE);
}
void
mcview_moveto_bol (mcview_t * view)
{
if (view->hex_mode)
{
view->hex_cursor -= view->hex_cursor % view->bytes_per_line;
}
else if (!view->text_wrap_mode)
{
view->dpy_start = mcview_bol (view, view->dpy_start, 0);
}
view->dpy_text_column = 0;
mcview_movement_fixups (view, TRUE);
}
void
mcview_moveto_match (mcview_t * view)
{
off_t offset;
offset = view->search_start;
if (view->hex_mode)
{
view->hex_cursor = offset;
view->dpy_start = offset - offset % view->bytes_per_line;
}
else
{
view->dpy_start = mcview_bol (view, offset, 0);
}
mcview_scroll_to_cursor (view);
view->dirty++;
}
void
mcview_toggle_hex_mode (mcview_t * view)
{
view->hex_mode = !view->hex_mode;
if (view->hex_mode)
{
view->hex_cursor = view->dpy_start;
view->dpy_start = mcview_offset_rounddown (view->dpy_start, view->bytes_per_line);
widget_want_cursor (WIDGET (view), TRUE);
}
else
{
view->dpy_start = mcview_bol (view, view->hex_cursor, 0);
view->hex_cursor = view->dpy_start;
widget_want_cursor (WIDGET (view), FALSE);
}
mcview_altered_hex_mode = 1;
view->dpy_bbar_dirty = TRUE;
view->dirty++;
}
void
mcview_moveto_match (WView * view)
{
if (view->mode_flags.hex)
{
view->hex_cursor = view->search_start;
view->hexedit_lownibble = FALSE;
view->dpy_start = view->search_start - view->search_start % view->bytes_per_line;
view->dpy_end = view->search_end - view->search_end % view->bytes_per_line;
view->dpy_paragraph_skip_lines = 0;
view->dpy_wrap_dirty = TRUE;
}
else
{
view->dpy_start = mcview_bol (view, view->search_start, 0);
view->dpy_paragraph_skip_lines = 0;
view->dpy_wrap_dirty = TRUE;
}
mcview_scroll_to_cursor (view);
view->dirty++;
}
gboolean
mcview_dialog_goto (WView * view, off_t * offset)
{
typedef enum
{
MC_VIEW_GOTO_LINENUM = 0,
MC_VIEW_GOTO_PERCENT = 1,
MC_VIEW_GOTO_OFFSET_DEC = 2,
MC_VIEW_GOTO_OFFSET_HEX = 3
} mcview_goto_type_t;
const char *mc_view_goto_str[] = {
N_("&Line number"),
N_("Pe&rcents"),
N_("&Decimal offset"),
N_("He&xadecimal offset")
};
static mcview_goto_type_t current_goto_type = MC_VIEW_GOTO_LINENUM;
size_t num_of_types;
char *exp = NULL;
int qd_result;
gboolean res;
num_of_types = G_N_ELEMENTS (mc_view_goto_str);
#ifdef ENABLE_NLS
{
size_t i;
for (i = 0; i < num_of_types; i++)
mc_view_goto_str[i] = _(mc_view_goto_str[i]);
}
#endif
{
quick_widget_t quick_widgets[] = {
/* *INDENT-OFF* */
QUICK_INPUT (INPUT_LAST_TEXT, MC_HISTORY_VIEW_GOTO, &exp, NULL,
FALSE, FALSE, INPUT_COMPLETE_NONE),
QUICK_RADIO (num_of_types, (const char **) mc_view_goto_str, (int *) ¤t_goto_type,
NULL),
QUICK_BUTTONS_OK_CANCEL,
QUICK_END
/* *INDENT-ON* */
};
quick_dialog_t qdlg = {
-1, -1, 40,
N_("Goto"), "[Input Line Keys]",
quick_widgets, NULL, NULL
};
/* run dialog */
qd_result = quick_dialog (&qdlg);
}
*offset = -1;
/* check input line value */
res = (qd_result != B_CANCEL && exp != NULL && exp[0] != '\0');
if (res)
{
int base = (current_goto_type == MC_VIEW_GOTO_OFFSET_HEX) ? 16 : 10;
off_t addr;
char *error;
addr = (off_t) g_ascii_strtoll (exp, &error, base);
if ((*error == '\0') && (addr >= 0))
{
switch (current_goto_type)
{
case MC_VIEW_GOTO_LINENUM:
/* Line number entered by user is 1-based. */
if (addr > 0)
addr--;
mcview_coord_to_offset (view, offset, addr, 0);
*offset = mcview_bol (view, *offset, 0);
break;
case MC_VIEW_GOTO_PERCENT:
if (addr > 100)
addr = 100;
/* read all data from pipe to get real size */
if (view->growbuf_in_use)
mcview_growbuf_read_all_data (view);
*offset = addr * mcview_get_filesize (view) / 100;
if (!view->mode_flags.hex)
*offset = mcview_bol (view, *offset, 0);
break;
case MC_VIEW_GOTO_OFFSET_DEC:
case MC_VIEW_GOTO_OFFSET_HEX:
if (!view->mode_flags.hex)
{
if (view->growbuf_in_use)
mcview_growbuf_read_until (view, addr);
*offset = mcview_bol (view, addr, 0);
}
else
{
/* read all data from pipe to get real size */
if (view->growbuf_in_use)
mcview_growbuf_read_all_data (view);
*offset = addr;
addr = mcview_get_filesize (view);
if (*offset > addr)
*offset = addr;
}
break;
default:
*offset = 0;
break;
}
}
}
g_free (exp);
return res;
}
gboolean
mcview_load (mcview_t * view, const char *command, const char *file, int start_line)
{
gboolean retval = FALSE;
vfs_path_t *vpath = NULL;
#ifdef HAVE_ASSERT_H
assert (view->bytes_per_line != 0);
#endif
view->filename_vpath = vfs_path_from_str (file);
/* get working dir */
if (file != NULL && file[0] != '\0')
{
vfs_path_free (view->workdir_vpath);
if (!g_path_is_absolute (file))
{
vfs_path_t *p;
p = vfs_path_clone (vfs_get_raw_current_dir ());
view->workdir_vpath = vfs_path_append_new (p, file, (char *) NULL);
vfs_path_free (p);
}
else
{
/* try extract path form filename */
const char *fname;
char *dir;
fname = x_basename (file);
dir = g_strndup (file, (size_t) (fname - file));
view->workdir_vpath = vfs_path_from_str (dir);
g_free (dir);
}
}
if (!mcview_is_in_panel (view))
view->dpy_text_column = 0;
mcview_set_codeset (view);
if (command != NULL && (view->magic_mode || file == NULL || file[0] == '\0'))
retval = mcview_load_command_output (view, command);
else if (file != NULL && file[0] != '\0')
{
int fd;
char tmp[BUF_MEDIUM];
struct stat st;
/* Open the file */
vpath = vfs_path_from_str (file);
fd = mc_open (vpath, O_RDONLY | O_NONBLOCK);
if (fd == -1)
{
g_snprintf (tmp, sizeof (tmp), _("Cannot open \"%s\"\n%s"),
file, unix_error_string (errno));
mcview_show_error (view, tmp);
vfs_path_free (view->filename_vpath);
view->filename_vpath = NULL;
vfs_path_free (view->workdir_vpath);
view->workdir_vpath = NULL;
goto finish;
}
/* Make sure we are working with a regular file */
if (mc_fstat (fd, &st) == -1)
{
mc_close (fd);
g_snprintf (tmp, sizeof (tmp), _("Cannot stat \"%s\"\n%s"),
file, unix_error_string (errno));
mcview_show_error (view, tmp);
vfs_path_free (view->filename_vpath);
view->filename_vpath = NULL;
vfs_path_free (view->workdir_vpath);
view->workdir_vpath = NULL;
goto finish;
}
if (!S_ISREG (st.st_mode))
{
mc_close (fd);
mcview_show_error (view, _("Cannot view: not a regular file"));
vfs_path_free (view->filename_vpath);
view->filename_vpath = NULL;
vfs_path_free (view->workdir_vpath);
view->workdir_vpath = NULL;
goto finish;
}
if (st.st_size == 0 || mc_lseek (fd, 0, SEEK_SET) == -1)
{
/* Must be one of those nice files that grow (/proc) */
mcview_set_datasource_vfs_pipe (view, fd);
}
else
{
int type;
type = get_compression_type (fd, file);
if (view->magic_mode && (type != COMPRESSION_NONE))
{
char *tmp_filename;
vfs_path_t *vpath1;
int fd1;
tmp_filename = g_strconcat (file, decompress_extension (type), (char *) NULL);
vpath1 = vfs_path_from_str (tmp_filename);
fd1 = mc_open (vpath1, O_RDONLY | O_NONBLOCK);
if (fd1 == -1)
{
g_snprintf (tmp, sizeof (tmp), _("Cannot open \"%s\" in parse mode\n%s"),
file, unix_error_string (errno));
mcview_show_error (view, tmp);
}
else
{
mc_close (fd);
fd = fd1;
mc_fstat (fd, &st);
}
vfs_path_free (vpath1);
g_free (tmp_filename);
}
mcview_set_datasource_file (view, fd, &st);
}
retval = TRUE;
}
finish:
view->command = g_strdup (command);
view->dpy_start = 0;
view->search_start = 0;
view->search_end = 0;
view->dpy_text_column = 0;
mcview_compute_areas (view);
mcview_update_bytes_per_line (view);
if (mcview_remember_file_position && view->filename_vpath != NULL && start_line == 0)
{
long line, col;
off_t new_offset, max_offset;
load_file_position (view->filename_vpath, &line, &col, &new_offset, &view->saved_bookmarks);
max_offset = mcview_get_filesize (view) - 1;
if (max_offset < 0)
new_offset = 0;
else
new_offset = min (new_offset, max_offset);
if (!view->hex_mode)
view->dpy_start = mcview_bol (view, new_offset, 0);
else
{
view->dpy_start = new_offset - new_offset % view->bytes_per_line;
view->hex_cursor = new_offset;
}
}
else if (start_line > 0)
mcview_moveto (view, start_line - 1, 0);
view->hexedit_lownibble = FALSE;
view->hexview_in_text = FALSE;
view->change_list = NULL;
vfs_path_free (vpath);
return retval;
}
gboolean
mcview_dialog_goto (mcview_t * view, off_t * offset)
{
typedef enum
{
MC_VIEW_GOTO_LINENUM = 0,
MC_VIEW_GOTO_PERCENT = 1,
MC_VIEW_GOTO_OFFSET_DEC = 2,
MC_VIEW_GOTO_OFFSET_HEX = 3
} mcview_goto_type_t;
const char *mc_view_goto_str[] = {
N_("&Line number (decimal)"),
N_("Pe&rcents"),
N_("&Decimal offset"),
N_("He&xadecimal offset")
};
const int goto_dlg_height = 12;
int goto_dlg_width = 40;
static mcview_goto_type_t current_goto_type = MC_VIEW_GOTO_LINENUM;
size_t i;
size_t num_of_types = sizeof (mc_view_goto_str) / sizeof (mc_view_goto_str[0]);
char *exp = NULL;
int qd_result;
gboolean res = FALSE;
QuickWidget quick_widgets[] = {
QUICK_BUTTON (6, 10, goto_dlg_height - 3, goto_dlg_height, N_("&Cancel"), B_CANCEL, NULL),
QUICK_BUTTON (2, 10, goto_dlg_height - 3, goto_dlg_height, N_("&OK"), B_ENTER, NULL),
QUICK_RADIO (3, goto_dlg_width, 4, goto_dlg_height,
num_of_types, (const char **) mc_view_goto_str, (int *) ¤t_goto_type),
QUICK_INPUT (3, goto_dlg_width, 2, goto_dlg_height,
INPUT_LAST_TEXT, goto_dlg_width - 6, 0, MC_HISTORY_VIEW_GOTO, &exp),
QUICK_END
};
QuickDialog Quick_input = {
goto_dlg_width, goto_dlg_height, -1, -1,
N_("Goto"), "[Input Line Keys]",
quick_widgets, NULL, NULL, FALSE
};
#ifdef ENABLE_NLS
for (i = 0; i < num_of_types; i++)
mc_view_goto_str[i] = _(mc_view_goto_str[i]);
quick_widgets[0].u.button.text = _(quick_widgets[0].u.button.text);
quick_widgets[1].u.button.text = _(quick_widgets[1].u.button.text);
#endif
/* calculate widget coordinates */
{
int b0_len, b1_len, len;
const int button_gap = 2;
/* preliminary dialog width */
goto_dlg_width = max (goto_dlg_width, str_term_width1 (Quick_input.title) + 4);
/* length of radiobuttons */
for (i = 0; i < num_of_types; i++)
goto_dlg_width = max (goto_dlg_width, str_term_width1 (mc_view_goto_str[i]) + 10);
/* length of buttons */
b0_len = str_term_width1 (quick_widgets[0].u.button.text) + 3;
b1_len = str_term_width1 (quick_widgets[1].u.button.text) + 5; /* default button */
len = b0_len + b1_len + button_gap * 2;
/* dialog width */
Quick_input.xlen = max (goto_dlg_width, len + 6);
/* correct widget coordinates */
for (i = sizeof (quick_widgets) / sizeof (quick_widgets[0]); i > 0; i--)
quick_widgets[i - 1].x_divisions = Quick_input.xlen;
/* input length */
quick_widgets[3].u.input.len = Quick_input.xlen - 6;
/* button positions */
quick_widgets[1].relative_x = Quick_input.xlen / 2 - len / 2;
quick_widgets[0].relative_x = quick_widgets[1].relative_x + b1_len + button_gap;
}
/* run dialog */
qd_result = quick_dialog (&Quick_input);
*offset = -1;
/* check input line value */
if ((qd_result != B_CANCEL) && (exp != NULL) && (exp[0] != '\0'))
{
int base = (current_goto_type == MC_VIEW_GOTO_OFFSET_HEX) ? 16 : 10;
off_t addr;
char *error;
res = TRUE;
addr = strtoll (exp, &error, base);
if ((*error == '\0') && (addr >= 0))
{
switch (current_goto_type)
{
case MC_VIEW_GOTO_LINENUM:
mcview_coord_to_offset (view, offset, addr, 0);
*offset = mcview_bol (view, *offset, 0);
break;
case MC_VIEW_GOTO_PERCENT:
if (addr > 100)
addr = 100;
*offset = addr * mcview_get_filesize (view) / 100;
if (!view->hex_mode)
*offset = mcview_bol (view, *offset, 0);
break;
case MC_VIEW_GOTO_OFFSET_DEC:
case MC_VIEW_GOTO_OFFSET_HEX:
*offset = addr;
if (!view->hex_mode)
*offset = mcview_bol (view, *offset, 0);
else
{
addr = mcview_get_filesize (view);
if (*offset > addr)
*offset = addr;
}
break;
default:
*offset = 0;
break;
}
}
}
g_free (exp);
return res;
}
void
mcview_move_up (mcview_t * view, off_t lines)
{
off_t new_offset;
if (view->hex_mode)
{
off_t bytes = lines * view->bytes_per_line;
if (view->hex_cursor >= bytes)
{
view->hex_cursor -= bytes;
if (view->hex_cursor < view->dpy_start)
view->dpy_start = mcview_offset_doz (view->dpy_start, bytes);
}
else
{
view->hex_cursor %= view->bytes_per_line;
}
}
else
{
off_t i;
for (i = 0; i < lines; i++)
{
if (view->dpy_start == 0)
break;
if (view->text_wrap_mode)
{
new_offset = mcview_bol (view, view->dpy_start, view->dpy_start - (off_t) 1);
/* check if dpy_start == BOL or not (then new_offset = dpy_start - 1,
* no need to check more) */
if (new_offset == view->dpy_start)
{
size_t last_row_length;
new_offset = mcview_bol (view, new_offset - 1, 0);
last_row_length = (view->dpy_start - new_offset) % view->data_area.width;
if (last_row_length != 0)
{
/* if dpy_start == BOL in wrapped mode, find BOL of previous line
* and move down all but the last rows */
new_offset = view->dpy_start - (off_t) last_row_length;
}
}
else
{
/* if dpy_start != BOL in wrapped mode, just move one row up;
* no need to check if > 0 as there is at least exactly one wrap
* between dpy_start and BOL */
new_offset = view->dpy_start - (off_t) view->data_area.width;
}
view->dpy_start = new_offset;
}
else
{
/* if unwrapped -> current BOL equals dpy_start, just find BOL of previous line */
new_offset = view->dpy_start - 1;
view->dpy_start = mcview_bol (view, new_offset, 0);
}
}
}
mcview_movement_fixups (view, TRUE);
}
