/* Display a message on the statusbar, and set disable_cursorpos to
* true, so that the message won't be immediately overwritten if
* constant cursor position display is on. */
void statusbar(const char *msg, ...)
{
va_list ap;
char *bar, *foo;
size_t start_x;
bool old_whitespace;
va_start(ap, msg);
/* Curses mode is turned off. If we use wmove() now, it will muck
* up the terminal settings. So we just use vfprintf(). */
if (isendwin()) {
vfprintf(stderr, msg, ap);
va_end(ap);
return;
}
blank_statusbar();
old_whitespace = ISSET(WHITESPACE_DISPLAY);
UNSET(WHITESPACE_DISPLAY);
bar = charalloc(mb_cur_max() * (COLS - 3));
vsnprintf(bar, mb_cur_max() * (COLS - 3), msg, ap);
va_end(ap);
foo = display_string(bar, 0, COLS - 4, false);
free(bar);
if (old_whitespace) {
SET(WHITESPACE_DISPLAY);
}
start_x = (COLS - strlenpt(foo) - 4) / 2;
wmove(bottomwin, 0, start_x);
set_color(bottomwin, interface_colors[STATUS_BAR]);
waddstr(bottomwin, "[ ");
waddstr(bottomwin, foo);
free(foo);
waddstr(bottomwin, " ]");
clear_color(bottomwin, interface_colors[STATUS_BAR]);
wnoutrefresh(bottomwin);
reset_cursor();
wnoutrefresh(edit);
/* Leave the cursor at its position in the edit window, not in
* the statusbar. */
disable_cursorpos = true;
/* If we're doing quick statusbar blanking, and constant cursor
* position display is off, blank the statusbar after only one
* keystroke. Otherwise, blank it after twenty-six keystrokes, as
* Pico does. */
statusblank = ISSET(QUICK_BLANK) && !ISSET(CONST_UPDATE) ? 1 : 26;
}
/* Return the index in buf of the beginning of the multibyte character
* before the one at pos. */
size_t move_mbleft(const char *buf, size_t pos)
{
size_t before, char_len = 0;
assert(buf != NULL && pos <= strlen(buf));
/* There is no library function to move backward one multibyte
* character. So we just start groping for one at the farthest
* possible point. */
if (mb_cur_max() > pos)
before = 0;
else
before = pos - mb_cur_max();
while (before < pos) {
char_len = parse_mbchar(buf + before, NULL, NULL);
before += char_len;
}
return before - char_len;
}
/* Is the word starting at position pos in buf a whole word? */
bool is_whole_word(size_t pos, const char *buf, const char *word)
{
char *p = charalloc(mb_cur_max()), *r = charalloc(mb_cur_max());
size_t word_end = pos + strlen(word);
bool retval;
assert(buf != NULL && pos <= strlen(buf) && word != NULL);
parse_mbchar(buf + move_mbleft(buf, pos), p, NULL);
parse_mbchar(buf + word_end, r, NULL);
/* If we're at the beginning of the line or the character before the
* word isn't a non-punctuation "word" character, and if we're at
* the end of the line or the character after the word isn't a
* non-punctuation "word" character, we have a whole word. */
retval = (pos == 0 || !is_word_mbchar(p, FALSE)) &&
(word_end == strlen(buf) || !is_word_mbchar(r, FALSE));
free(p);
free(r);
return retval;
}
/* Return TRUE when the given multibyte character c is a word-forming
* character (that is: alphanumeric, or specified in wordchars, or
* punctuation when allow_punct is TRUE), and FALSE otherwise. */
bool is_word_mbchar(const char *c, bool allow_punct)
{
if (*c == '\0')
return FALSE;
if (is_alnum_mbchar(c))
return TRUE;
if (word_chars != NULL && *word_chars != '\0') {
char symbol[mb_cur_max() + 1];
int symlen = parse_mbchar(c, symbol, NULL);
symbol[symlen] = '\0';
return (strstr(word_chars, symbol) != NULL);
}
return (allow_punct && is_punct_mbchar(c));
}
/* Ask a question on the statusbar. The prompt will be stored in the
* static prompt, which should be NULL initially, and the answer will be
* stored in the answer global. Returns -1 on aborted enter, -2 on a
* blank string, and 0 otherwise, the valid shortcut key caught.
* curranswer is any editable text that we want to put up by default,
* and refresh_func is the function we want to call to refresh the edit
* window.
*
* The allow_tabs parameter indicates whether we should allow tabs to be
* interpreted. The allow_files parameter indicates whether we should
* allow all files (as opposed to just directories) to be tab
* completed. */
int do_prompt(bool allow_tabs,
#ifndef DISABLE_TABCOMP
bool allow_files,
#endif
int menu, const char *curranswer,
#ifndef DISABLE_HISTORIES
linestruct **history_list,
#endif
void (*refresh_func)(void), const char *msg, ...)
{
va_list ap;
int retval;
functionptrtype func;
#ifndef DISABLE_TABCOMP
bool list = FALSE;
#endif
/* prompt has been freed and set to NULL unless the user resized
* while at the statusbar prompt. */
free(prompt);
prompt = charalloc(((COLS - 4) * mb_cur_max()) + 1);
bottombars(menu);
va_start(ap, msg);
vsnprintf(prompt, (COLS - 4) * mb_cur_max(), msg, ap);
va_end(ap);
null_at(&prompt, actual_x(prompt, COLS - 4));
func = get_prompt_string(&retval, allow_tabs,
#ifndef DISABLE_TABCOMP
allow_files,
&list,
#endif
curranswer,
#ifndef DISABLE_HISTORIES
history_list,
#endif
refresh_func);
free(prompt);
prompt = NULL;
/* We're done with the prompt, so save the statusbar cursor
* position. */
old_statusbar_x = statusbar_x;
old_pww = statusbar_pww;
/* If we left the prompt via Cancel or Enter, set the return value
* properly. */
if (func == do_cancel)
retval = -1;
else if (func == do_enter_void)
retval = (*answer == '\0') ? -2 : 0;
blank_statusbar();
wnoutrefresh(bottomwin);
#ifdef DEBUG
fprintf(stderr, "answer = \"%s\"\n", answer);
#endif
#ifndef DISABLE_TABCOMP
/* If we've done tab completion, there might be a list of filename
* matches on the edit window at this point. Make sure that they're
* cleared off. */
if (list)
refresh_func();
#endif
return retval;
}
/* Move to the previous word in the prompt text. If allow_punct is
* TRUE, treat punctuation as part of a word. Return TRUE if we started
* on a word, and FALSE otherwise. */
bool do_statusbar_prev_word(bool allow_punct)
{
size_t pww_save = statusbar_pww;
char *char_mb;
int char_mb_len;
bool begin_line = FALSE, started_on_word = FALSE;
assert(answer != NULL);
char_mb = charalloc(mb_cur_max());
/* Move backward until we find the character before the first letter
* of the current word. */
while (!begin_line) {
char_mb_len = parse_mbchar(answer + statusbar_x, char_mb, NULL);
/* If we've found it, stop moving backward through the current
* line. */
if (!is_word_mbchar(char_mb, allow_punct))
break;
/* If we haven't found it, then we've started on a word, so set
* started_on_word to TRUE. */
started_on_word = TRUE;
if (statusbar_x == 0)
begin_line = TRUE;
else
statusbar_x = move_mbleft(answer, statusbar_x);
}
/* Move backward until we find the last letter of the previous
* word. */
if (statusbar_x == 0)
begin_line = TRUE;
else
statusbar_x = move_mbleft(answer, statusbar_x);
while (!begin_line) {
char_mb_len = parse_mbchar(answer + statusbar_x, char_mb, NULL);
/* If we've found it, stop moving backward through the current
* line. */
if (is_word_mbchar(char_mb, allow_punct))
break;
if (statusbar_x == 0)
begin_line = TRUE;
else
statusbar_x = move_mbleft(answer, statusbar_x);
}
/* If we've found it, move backward until we find the character
* before the first letter of the previous word. */
if (!begin_line) {
if (statusbar_x == 0)
begin_line = TRUE;
else
statusbar_x = move_mbleft(answer, statusbar_x);
while (!begin_line) {
char_mb_len = parse_mbchar(answer + statusbar_x, char_mb,
NULL);
/* If we've found it, stop moving backward through the
* current line. */
if (!is_word_mbchar(char_mb, allow_punct))
break;
if (statusbar_x == 0)
begin_line = TRUE;
else
statusbar_x = move_mbleft(answer, statusbar_x);
}
/* If we've found it, move forward to the first letter of the
* previous word. */
if (!begin_line)
statusbar_x += char_mb_len;
}
free(char_mb);
statusbar_pww = statusbar_xplustabs();
if (need_statusbar_update(pww_save))
update_statusbar_line(answer, statusbar_x);
/* Return whether we started on a word. */
return started_on_word;
}
/* Move to the next word in the prompt text. If allow_punct is TRUE,
* treat punctuation as part of a word. Return TRUE if we started on a
* word, and FALSE otherwise. */
bool do_statusbar_next_word(bool allow_punct)
{
size_t pww_save = statusbar_pww;
char *char_mb;
int char_mb_len;
bool end_line = FALSE, started_on_word = FALSE;
assert(answer != NULL);
char_mb = charalloc(mb_cur_max());
/* Move forward until we find the character after the last letter of
* the current word. */
while (!end_line) {
char_mb_len = parse_mbchar(answer + statusbar_x, char_mb, NULL);
/* If we've found it, stop moving forward through the current
* line. */
if (!is_word_mbchar(char_mb, allow_punct))
break;
/* If we haven't found it, then we've started on a word, so set
* started_on_word to TRUE. */
started_on_word = TRUE;
if (answer[statusbar_x] == '\0')
end_line = TRUE;
else
statusbar_x += char_mb_len;
}
/* Move forward until we find the first letter of the next word. */
if (answer[statusbar_x] == '\0')
end_line = TRUE;
else
statusbar_x += char_mb_len;
while (!end_line) {
char_mb_len = parse_mbchar(answer + statusbar_x, char_mb, NULL);
/* If we've found it, stop moving forward through the current
* line. */
if (is_word_mbchar(char_mb, allow_punct))
break;
if (answer[statusbar_x] == '\0')
end_line = TRUE;
else
statusbar_x += char_mb_len;
}
free(char_mb);
statusbar_pww = statusbar_xplustabs();
if (need_statusbar_update(pww_save))
update_statusbar_line(answer, statusbar_x);
/* Return whether we started on a word. */
return started_on_word;
}
/* The user typed output_len multibyte characters. Add them to the
* statusbar prompt, setting got_enter to TRUE if we get a newline, and
* filtering out all ASCII control characters if allow_cntrls is
* TRUE. */
void do_statusbar_output(char *output, size_t output_len, bool
*got_enter, bool allow_cntrls)
{
size_t answer_len, i = 0;
char *char_buf = charalloc(mb_cur_max());
int char_buf_len;
assert(answer != NULL);
answer_len = strlen(answer);
*got_enter = FALSE;
while (i < output_len) {
/* If allow_cntrls is TRUE, convert nulls and newlines
* properly. */
if (allow_cntrls) {
/* Null to newline, if needed. */
if (output[i] == '\0')
output[i] = '\n';
/* Newline to Enter, if needed. */
else if (output[i] == '\n') {
/* Set got_enter to TRUE to indicate that we got the
* Enter key, put back the rest of the characters in
* output so that they can be parsed and output again,
* and get out. */
*got_enter = TRUE;
unparse_kbinput(output + i, output_len - i);
return;
}
}
/* Interpret the next multibyte character. */
char_buf_len = parse_mbchar(output + i, char_buf, NULL);
i += char_buf_len;
/* If allow_cntrls is FALSE, filter out an ASCII control
* character. */
if (!allow_cntrls && is_ascii_cntrl_char(*(output + i -
char_buf_len)))
continue;
/* More dangerousness fun. =) */
answer = charealloc(answer, answer_len + (char_buf_len * 2));
assert(statusbar_x <= answer_len);
charmove(answer + statusbar_x + char_buf_len,
answer + statusbar_x, answer_len - statusbar_x +
char_buf_len);
strncpy(answer + statusbar_x, char_buf, char_buf_len);
answer_len += char_buf_len;
statusbar_x += char_buf_len;
}
free(char_buf);
statusbar_pww = statusbar_xplustabs();
update_statusbar_line(answer, statusbar_x);
}
/* Move to the previous word in the file. If allow_punct is TRUE, treat
* punctuation as part of a word. If allow_update is TRUE, update the
* screen afterwards. Return TRUE if we started on a word, and FALSE
* otherwise. */
bool do_prev_word(bool allow_punct, bool allow_update)
{
size_t pww_save = openfile->placewewant;
filestruct *current_save = openfile->current;
char *char_mb;
int char_mb_len;
bool begin_line = FALSE, started_on_word = FALSE;
assert(openfile->current != NULL && openfile->current->data != NULL);
char_mb = charalloc(mb_cur_max());
/* Move backward until we find the character before the first letter
* of the current word. */
while (!begin_line) {
char_mb_len = parse_mbchar(openfile->current->data +
openfile->current_x, char_mb, NULL);
/* If we've found it, stop moving backward through the current
* line. */
if (!is_word_mbchar(char_mb, allow_punct))
break;
/* If we haven't found it, then we've started on a word, so set
* started_on_word to TRUE. */
started_on_word = TRUE;
if (openfile->current_x == 0)
begin_line = TRUE;
else
openfile->current_x = move_mbleft(openfile->current->data,
openfile->current_x);
}
/* Move backward until we find the last letter of the previous
* word. */
if (openfile->current_x == 0)
begin_line = TRUE;
else
openfile->current_x = move_mbleft(openfile->current->data,
openfile->current_x);
for (; openfile->current != NULL;
openfile->current = openfile->current->prev) {
while (!begin_line) {
char_mb_len = parse_mbchar(openfile->current->data +
openfile->current_x, char_mb, NULL);
/* If we've found it, stop moving backward through the
* current line. */
if (is_word_mbchar(char_mb, allow_punct))
break;
if (openfile->current_x == 0)
begin_line = TRUE;
else
openfile->current_x =
move_mbleft(openfile->current->data,
openfile->current_x);
}
/* If we've found it, stop moving backward to the ends of
* previous lines. */
if (!begin_line)
break;
if (openfile->current != openfile->fileage) {
begin_line = FALSE;
openfile->current_x = strlen(openfile->current->prev->data);
}
}
/* If we haven't found it, move to the beginning of the file. */
if (openfile->current == NULL)
openfile->current = openfile->fileage;
/* If we've found it, move backward until we find the character
* before the first letter of the previous word. */
else if (!begin_line) {
if (openfile->current_x == 0)
begin_line = TRUE;
else
openfile->current_x = move_mbleft(openfile->current->data,
openfile->current_x);
while (!begin_line) {
char_mb_len = parse_mbchar(openfile->current->data +
openfile->current_x, char_mb, NULL);
/* If we've found it, stop moving backward through the
* current line. */
if (!is_word_mbchar(char_mb, allow_punct))
break;
if (openfile->current_x == 0)
begin_line = TRUE;
else
openfile->current_x =
move_mbleft(openfile->current->data,
openfile->current_x);
}
/* If we've found it, move forward to the first letter of the
* previous word. */
if (!begin_line)
openfile->current_x += char_mb_len;
}
free(char_mb);
openfile->placewewant = xplustabs();
/* If allow_update is TRUE, update the screen. */
if (allow_update)
edit_redraw(current_save, pww_save);
/* Return whether we started on a word. */
return started_on_word;
}
/* Move to the next word in the file. If allow_punct is TRUE, treat
* punctuation as part of a word. If allow_update is TRUE, update the
* screen afterwards. Return TRUE if we started on a word, and FALSE
* otherwise. */
bool do_next_word(bool allow_punct, bool allow_update)
{
size_t pww_save = openfile->placewewant;
filestruct *current_save = openfile->current;
char *char_mb;
int char_mb_len;
bool end_line = FALSE, started_on_word = FALSE;
assert(openfile->current != NULL && openfile->current->data != NULL);
char_mb = charalloc(mb_cur_max());
/* Move forward until we find the character after the last letter of
* the current word. */
while (!end_line) {
char_mb_len = parse_mbchar(openfile->current->data +
openfile->current_x, char_mb, NULL);
/* If we've found it, stop moving forward through the current
* line. */
if (!is_word_mbchar(char_mb, allow_punct))
break;
/* If we haven't found it, then we've started on a word, so set
* started_on_word to TRUE. */
started_on_word = TRUE;
if (openfile->current->data[openfile->current_x] == '\0')
end_line = TRUE;
else
openfile->current_x += char_mb_len;
}
/* Move forward until we find the first letter of the next word. */
if (openfile->current->data[openfile->current_x] == '\0')
end_line = TRUE;
else
openfile->current_x += char_mb_len;
for (; openfile->current != NULL;
openfile->current = openfile->current->next) {
while (!end_line) {
char_mb_len = parse_mbchar(openfile->current->data +
openfile->current_x, char_mb, NULL);
/* If we've found it, stop moving forward through the
* current line. */
if (is_word_mbchar(char_mb, allow_punct))
break;
if (openfile->current->data[openfile->current_x] == '\0')
end_line = TRUE;
else
openfile->current_x += char_mb_len;
}
/* If we've found it, stop moving forward to the beginnings of
* subsequent lines. */
if (!end_line)
break;
if (openfile->current != openfile->filebot) {
end_line = FALSE;
openfile->current_x = 0;
}
}
free(char_mb);
/* If we haven't found it, move to the end of the file. */
if (openfile->current == NULL)
openfile->current = openfile->filebot;
openfile->placewewant = xplustabs();
/* If allow_update is TRUE, update the screen. */
if (allow_update)
edit_redraw(current_save, pww_save);
/* Return whether we started on a word. */
return started_on_word;
}
/* Search for a match to the bracket at the current cursor position, if
* there is one. */
void do_find_bracket(void)
{
linestruct *current_save;
size_t current_x_save, pww_save;
const char *ch;
/* The location in matchbrackets of the bracket at the current
* cursor position. */
int ch_len;
/* The length of ch in bytes. */
const char *wanted_ch;
/* The location in matchbrackets of the bracket complementing
* the bracket at the current cursor position. */
int wanted_ch_len;
/* The length of wanted_ch in bytes. */
char *bracket_set;
/* The pair of characters in ch and wanted_ch. */
size_t i;
/* Generic loop variable. */
size_t matchhalf;
/* The number of single-byte characters in one half of
* matchbrackets. */
size_t mbmatchhalf;
/* The number of multibyte characters in one half of
* matchbrackets. */
size_t count = 1;
/* The initial bracket count. */
bool reverse;
/* The direction we search. */
char *found_ch;
/* The character we find. */
assert(mbstrlen(matchbrackets) % 2 == 0);
ch = openfile->current->data + openfile->current_x;
if (ch == '\0' || (ch = mbstrchr(matchbrackets, ch)) == NULL) {
statusbar(_("Not a bracket"));
return;
}
/* Save where we are. */
current_save = openfile->current;
current_x_save = openfile->current_x;
pww_save = openfile->placewewant;
/* If we're on an opening bracket, which must be in the first half
* of matchbrackets, we want to search forwards for a closing
* bracket. If we're on a closing bracket, which must be in the
* second half of matchbrackets, we want to search backwards for an
* opening bracket. */
matchhalf = 0;
mbmatchhalf = mbstrlen(matchbrackets) / 2;
for (i = 0; i < mbmatchhalf; i++)
matchhalf += parse_mbchar(matchbrackets + matchhalf, NULL,
NULL);
reverse = ((ch - matchbrackets) >= matchhalf);
/* If we're on an opening bracket, set wanted_ch to the character
* that's matchhalf characters after ch. If we're on a closing
* bracket, set wanted_ch to the character that's matchhalf
* characters before ch. */
wanted_ch = ch;
while (mbmatchhalf > 0) {
if (reverse)
wanted_ch = matchbrackets + move_mbleft(matchbrackets,
wanted_ch - matchbrackets);
else
wanted_ch += move_mbright(wanted_ch, 0);
mbmatchhalf--;
}
ch_len = parse_mbchar(ch, NULL, NULL);
wanted_ch_len = parse_mbchar(wanted_ch, NULL, NULL);
/* Fill bracket_set in with the values of ch and wanted_ch. */
bracket_set = charalloc((mb_cur_max() * 2) + 1);
strncpy(bracket_set, ch, ch_len);
strncpy(bracket_set + ch_len, wanted_ch, wanted_ch_len);
null_at(&bracket_set, ch_len + wanted_ch_len);
found_ch = charalloc(mb_cur_max() + 1);
while (TRUE) {
if (find_bracket_match(reverse, bracket_set)) {
/* If we found an identical bracket, increment count. If we
* found a complementary bracket, decrement it. */
parse_mbchar(openfile->current->data + openfile->current_x,
found_ch, NULL);
count += (strncmp(found_ch, ch, ch_len) == 0) ? 1 : -1;
/* If count is zero, we've found a matching bracket. Update
* the screen and get out. */
if (count == 0) {
edit_redraw(current_save, pww_save);
break;
}
} else {
/* We didn't find either an opening or closing bracket.
* Indicate this, restore where we were, and get out. */
statusbar(_("No matching bracket"));
openfile->current = current_save;
openfile->current_x = current_x_save;
openfile->placewewant = pww_save;
break;
}
}
/* Clean up. */
free(bracket_set);
free(found_ch);
}
/* Allocate space for the help text for the current menu, and concatenate
* the different pieces of text into it. */
void help_init(void)
{
size_t allocsize = 0;
/* Space needed for help_text. */
const char *htx[3];
/* Untranslated help introduction. We break it up into three chunks
* in case the full string is too long for the compiler to handle. */
char *ptr;
const subnfunc *f;
const sc *s;
#ifndef NANO_TINY
bool old_whitespace = ISSET(WHITESPACE_DISPLAY);
UNSET(WHITESPACE_DISPLAY);
#endif
/* First, set up the initial help text for the current function. */
if (currmenu == MWHEREIS || currmenu == MREPLACE || currmenu == MREPLACEWITH) {
htx[0] = N_("Search Command Help Text\n\n "
"Enter the words or characters you would like to "
"search for, and then press Enter. If there is a "
"match for the text you entered, the screen will be "
"updated to the location of the nearest match for the "
"search string.\n\n The previous search string will be "
"shown in brackets after the search prompt. Hitting "
"Enter without entering any text will perform the "
"previous search. ");
htx[1] = N_("If you have selected text with the mark and then "
"search to replace, only matches in the selected text "
"will be replaced.\n\n The following function keys are "
"available in Search mode:\n\n");
htx[2] = NULL;
} else if (currmenu == MGOTOLINE) {
htx[0] = N_("Go To Line Help Text\n\n "
"Enter the line number that you wish to go to and hit "
"Enter. If there are fewer lines of text than the "
"number you entered, you will be brought to the last "
"line of the file.\n\n The following function keys are "
"available in Go To Line mode:\n\n");
htx[1] = NULL;
htx[2] = NULL;
} else if (currmenu == MINSERTFILE) {
htx[0] = N_("Insert File Help Text\n\n "
"Type in the name of a file to be inserted into the "
"current file buffer at the current cursor "
"location.\n\n If you have compiled nano with multiple "
"file buffer support, and enable multiple file buffers "
"with the -F or --multibuffer command line flags, the "
"Meta-F toggle, or a nanorc file, inserting a file "
"will cause it to be loaded into a separate buffer "
"(use Meta-< and > to switch between file buffers). ");
htx[1] = N_("If you need another blank buffer, do not enter "
"any filename, or type in a nonexistent filename at "
"the prompt and press Enter.\n\n The following "
"function keys are available in Insert File mode:\n\n");
htx[2] = NULL;
} else if (currmenu == MWRITEFILE) {
htx[0] = N_("Write File Help Text\n\n "
"Type the name that you wish to save the current file "
"as and press Enter to save the file.\n\n If you have "
"selected text with the mark, you will be prompted to "
"save only the selected portion to a separate file. To "
"reduce the chance of overwriting the current file with "
"just a portion of it, the current filename is not the "
"default in this mode.\n\n The following function keys "
"are available in Write File mode:\n\n");
htx[1] = NULL;
htx[2] = NULL;
}
#ifndef DISABLE_BROWSER
else if (currmenu == MBROWSER) {
htx[0] = N_("File Browser Help Text\n\n "
"The file browser is used to visually browse the "
"directory structure to select a file for reading "
"or writing. You may use the arrow keys or Page Up/"
"Down to browse through the files, and S or Enter to "
"choose the selected file or enter the selected "
"directory. To move up one level, select the "
"directory called \"..\" at the top of the file "
"list.\n\n The following function keys are available "
"in the file browser:\n\n");
htx[1] = NULL;
htx[2] = NULL;
} else if (currmenu == MWHEREISFILE) {
htx[0] = N_("Browser Search Command Help Text\n\n "
"Enter the words or characters you would like to "
"search for, and then press Enter. If there is a "
"match for the text you entered, the screen will be "
"updated to the location of the nearest match for the "
"search string.\n\n The previous search string will be "
"shown in brackets after the search prompt. Hitting "
"Enter without entering any text will perform the "
"previous search.\n\n");
htx[1] = N_(" The following function keys are available in "
"Browser Search mode:\n\n");
htx[2] = NULL;
} else if (currmenu == MGOTODIR) {
htx[0] = N_("Browser Go To Directory Help Text\n\n "
"Enter the name of the directory you would like to "
"browse to.\n\n If tab completion has not been "
"disabled, you can use the Tab key to (attempt to) "
"automatically complete the directory name.\n\n The "
"following function keys are available in Browser Go "
"To Directory mode:\n\n");
htx[1] = NULL;
htx[2] = NULL;
}
#endif /* !DISABLE_BROWSER */
#ifndef DISABLE_SPELLER
else if (currmenu == MSPELL) {
htx[0] = N_("Spell Check Help Text\n\n "
"The spell checker checks the spelling of all text in "
"the current file. When an unknown word is "
"encountered, it is highlighted and a replacement can "
"be edited. It will then prompt to replace every "
"instance of the given misspelled word in the current "
"file, or, if you have selected text with the mark, in "
"the selected text.\n\n The following function keys "
"are available in Spell Check mode:\n\n");
htx[1] = NULL;
htx[2] = NULL;
}
#endif /* !DISABLE_SPELLER */
#ifndef NANO_TINY
else if (currmenu == MEXTCMD) {
htx[0] = N_("Execute Command Help Text\n\n "
"This mode allows you to insert the output of a "
"command run by the shell into the current buffer (or "
"a new buffer in multiple file buffer mode). If you "
"need another blank buffer, do not enter any "
"command.\n\n The following function keys are "
"available in Execute Command mode:\n\n");
htx[1] = NULL;
htx[2] = NULL;
}
#endif /* !NANO_TINY */
else {
/* Default to the main help list. */
htx[0] = N_("Main nano help text\n\n "
"The nano editor is designed to emulate the "
"functionality and ease-of-use of the UW Pico text "
"editor. There are four main sections of the editor. "
"The top line shows the program version, the current "
"filename being edited, and whether or not the file "
"has been modified. Next is the main editor window "
"showing the file being edited. The status line is "
"the third line from the bottom and shows important "
"messages. ");
htx[1] = N_("The bottom two lines show the most commonly used "
"shortcuts in the editor.\n\n Shortcuts are written as "
"follows: Control-key sequences are notated with a '^' "
"and can be entered either by using the Ctrl key or "
"pressing the Esc key twice. Meta-key sequences are "
"notated with 'M-' and can be entered using either the "
"Alt, Cmd, or Esc key, depending on your keyboard setup. ");
htx[2] = N_("Also, pressing Esc twice and then typing a "
"three-digit decimal number from 000 to 255 will enter "
"the character with the corresponding value. The "
"following keystrokes are available in the main editor "
"window. Alternative keys are shown in "
"parentheses:\n\n");
}
htx[0] = _(htx[0]);
if (htx[1] != NULL)
htx[1] = _(htx[1]);
if (htx[2] != NULL)
htx[2] = _(htx[2]);
allocsize += strlen(htx[0]);
if (htx[1] != NULL)
allocsize += strlen(htx[1]);
if (htx[2] != NULL)
allocsize += strlen(htx[2]);
/* Calculate the length of the shortcut help text. Each entry has
* one or two keys, which fill 16 columns, plus translated text,
* plus one or two \n's. */
for (f = allfuncs; f != NULL; f = f->next)
if (f->menus & currmenu)
allocsize += (16 * mb_cur_max()) + strlen(f->help) + 2;
#ifndef NANO_TINY
/* If we're on the main list, we also count the toggle help text.
* Each entry has "M-%c\t\t", five chars which fill 16 columns,
* plus a space, plus translated text, plus one or two '\n's. */
if (currmenu == MMAIN) {
size_t endis_len = strlen(_("enable/disable"));
for (s = sclist; s != NULL; s = s->next)
if (s->scfunc == do_toggle_void)
allocsize += strlen(_(flagtostr(s->toggle))) + endis_len + 8;
}
#endif
/* Allocate space for the help text. */
help_text = charalloc(allocsize + 1);
/* Now add the text we want. */
strcpy(help_text, htx[0]);
if (htx[1] != NULL)
strcat(help_text, htx[1]);
if (htx[2] != NULL)
strcat(help_text, htx[2]);
ptr = help_text + strlen(help_text);
/* Remember this end-of-introduction, start-of-shortcuts. */
end_of_intro = ptr;
/* Now add our shortcut info. */
for (f = allfuncs; f != NULL; f = f->next) {
int scsfound = 0;
if ((f->menus & currmenu) == 0)
continue;
/* Let's simply show the first two shortcuts from the list. */
for (s = sclist; s != NULL; s = s->next) {
if ((s->menus & currmenu) == 0)
continue;
if (s->scfunc == f->scfunc) {
scsfound++;
/* Make the first column narrower (6) than the second (10),
* but allow it to spill into the second, for "M-Space". */
if (scsfound == 1) {
sprintf(ptr, "%s ", s->keystr);
/* Unicode arrows take three bytes instead of one. */
if (s->keystr[1] == '\xE2')
ptr += 8;
else
ptr += 6;
} else {
ptr += sprintf(ptr, "(%s)\t", s->keystr);
break;
}
}
}
if (scsfound == 0)
ptr += sprintf(ptr, "\t\t");
else if (scsfound == 1)
ptr += 10;
/* The shortcut's help text. */
ptr += sprintf(ptr, "%s\n", _(f->help));
if (f->blank_after)
ptr += sprintf(ptr, "\n");
}
#ifndef NANO_TINY
/* And the toggles... */
if (currmenu == MMAIN) {
int maximum = 0, counter = 0;
/* First see how many toggles there are. */
for (s = sclist; s != NULL; s = s->next)
maximum = (s->toggle && s->ordinal > maximum) ? s->ordinal : maximum;
/* Now show them in the original order. */
while (counter < maximum) {
counter++;
for (s = sclist; s != NULL; s = s->next)
if (s->toggle && s->ordinal == counter) {
ptr += sprintf(ptr, "%s\t\t%s %s\n", (s->menus == MMAIN ? s->keystr : ""),
_(flagtostr(s->toggle)), _("enable/disable"));
if (s->toggle == NO_COLOR_SYNTAX || s->toggle == TABS_TO_SPACES)
ptr += sprintf(ptr, "\n");
break;
}
}
}
if (old_whitespace)
SET(WHITESPACE_DISPLAY);
#endif /* !NANO_TINY */
/* If all went well, we didn't overwrite the allocated space. */
assert(strlen(help_text) <= allocsize + 1);
}
char *display_string(const char *buf, size_t start_col, size_t len, bool dollars)
{
size_t start_index;
/* Index in buf of the first character shown. */
size_t column;
/* Screen column that start_index corresponds to. */
size_t alloc_len;
/* The length of memory allocated for converted. */
char *converted;
/* The string we return. */
size_t index;
/* Current position in converted. */
char *buf_mb;
int buf_mb_len;
/* If dollars is true, make room for the "$" at the end of the
* line. */
if (dollars && len > 0 && strlenpt(buf) > start_col + len) {
len--;
}
if (len == 0) {
return mallocstrcpy(NULL, "");
}
buf_mb = charalloc(mb_cur_max());
start_index = actual_x(buf, start_col);
column = strnlenpt(buf, start_index);
assert(column <= start_col);
/* Make sure there's enough room for the initial character, whether
* it's a multibyte control character, a non-control multibyte
* character, a tab character, or a null terminator. Rationale:
*
* multibyte control character followed by a null terminator:
* 1 byte ('^') + mb_cur_max() bytes + 1 byte ('\0')
* multibyte non-control character followed by a null terminator:
* mb_cur_max() bytes + 1 byte ('\0')
* tab character followed by a null terminator:
* mb_cur_max() bytes + (tabsize - 1) bytes + 1 byte ('\0')
*
* Since tabsize has a minimum value of 1, it can substitute for 1
* byte above. */
alloc_len = (mb_cur_max() + tabsize + 1) * MAX_BUF_SIZE;
converted = charalloc(alloc_len);
index = 0;
if (buf[start_index] != '\0' && buf[start_index] != '\t' && (column < start_col || (dollars && column > 0))) {
/* We don't display all of buf[start_index] since it starts to
* the left of the screen. */
buf_mb_len = parse_mbchar(buf + start_index, buf_mb, NULL);
if (is_cntrl_mbchar(buf_mb)) {
if (column < start_col) {
char *ctrl_buf_mb = charalloc(mb_cur_max());
int ctrl_buf_mb_len, i;
ctrl_buf_mb = control_mbrep(buf_mb, ctrl_buf_mb, &ctrl_buf_mb_len);
for (i = 0; i < ctrl_buf_mb_len; i++) {
converted[index++] = ctrl_buf_mb[i];
}
start_col += mbwidth(ctrl_buf_mb);
free(ctrl_buf_mb);
start_index += buf_mb_len;
}
} else if (using_utf8() && mbwidth(buf_mb) == 2) {
if (column >= start_col) {
converted[index++] = ' ';
start_col++;
}
converted[index++] = ' ';
start_col++;
start_index += buf_mb_len;
}
}
while (buf[start_index] != '\0') {
buf_mb_len = parse_mbchar(buf + start_index, buf_mb, NULL);
/* Make sure there's enough room for the next character, whether
* it's a multibyte control character, a non-control multibyte
* character, a tab character, or a null terminator. */
if (index + mb_cur_max() + tabsize + 1 >= alloc_len - 1) {
alloc_len += (mb_cur_max() + tabsize + 1) * MAX_BUF_SIZE;
converted = charealloc(converted, alloc_len);
}
/* If buf contains a tab character, interpret it. */
if (*buf_mb == '\t') {
if (ISSET(WHITESPACE_DISPLAY)) {
int i;
for (i = 0; i < whitespace_len[0]; i++) {
converted[index++] = whitespace[i];
}
} else {
converted[index++] = ' ';
}
start_col++;
while (start_col % tabsize != 0) {
converted[index++] = ' ';
start_col++;
}
} else if (is_cntrl_mbchar(buf_mb)) {
/* If buf contains a control character, interpret it. */
char *ctrl_buf_mb = charalloc(mb_cur_max());
int ctrl_buf_mb_len, i;
converted[index++] = '^';
start_col++;
ctrl_buf_mb = control_mbrep(buf_mb, ctrl_buf_mb, &ctrl_buf_mb_len);
for (i = 0; i < ctrl_buf_mb_len; i++) {
converted[index++] = ctrl_buf_mb[i];
}
start_col += mbwidth(ctrl_buf_mb);
free(ctrl_buf_mb);
/* If buf contains a space character, interpret it. */
} else if (*buf_mb == ' ') {
if (ISSET(WHITESPACE_DISPLAY)) {
int i;
for (i = whitespace_len[0]; i < whitespace_len[0] + whitespace_len[1]; i++) {
converted[index++] = whitespace[i];
}
} else {
converted[index++] = ' ';
}
start_col++;
} else {
/* If buf contains a non-control character, interpret it. If buf
* contains an invalid multibyte sequence, display it as such. */
char *nctrl_buf_mb = charalloc(mb_cur_max());
int nctrl_buf_mb_len, i;
/* Make sure an invalid sequence-starter byte is properly
* terminated, so that it doesn't pick up lingering bytes
* of any previous content. */
null_at(&buf_mb, buf_mb_len);
nctrl_buf_mb = mbrep(buf_mb, nctrl_buf_mb, &nctrl_buf_mb_len);
for (i = 0; i < nctrl_buf_mb_len; i++) {
converted[index++] = nctrl_buf_mb[i];
}
start_col += mbwidth(nctrl_buf_mb);
free(nctrl_buf_mb);
}
start_index += buf_mb_len;
}
free(buf_mb);
assert(alloc_len >= index + 1);
/* Null-terminate converted. */
converted[index] = '\0';
/* Make sure converted takes up no more than len columns. */
index = actual_x(converted, len);
null_at(&converted, index);
return converted;
}
