/* Our main help-viewer function. */
void do_help(void)
{
int kbinput = ERR;
bool old_no_help = ISSET(NO_HELP);
size_t line = 0;
/* The line number in help_text of the first displayed help
* line. This variable is zero-based. */
size_t last_line = 0;
/* The line number in help_text of the last help line. This
* variable is zero-based. */
int oldmenu = currmenu;
/* The menu we were called from. */
const char *ptr;
/* The current line of the help text. */
size_t old_line = (size_t)-1;
/* The line we were on before the current line. */
functionptrtype func;
/* The function of the key the user typed in. */
/* Don't show a cursor in the help screen. */
curs_set(0);
blank_edit();
blank_statusbar();
/* Set help_text as the string to display. */
help_init();
assert(help_text != NULL);
if (ISSET(NO_HELP)) {
/* Make sure that the help screen's shortcut list will actually
* be displayed. */
UNSET(NO_HELP);
window_init();
}
bottombars(MHELP);
wnoutrefresh(bottomwin);
while (TRUE) {
size_t i;
ptr = help_text;
/* Find the line number of the last line of the help text. */
for (last_line = 0; *ptr != '\0'; last_line++) {
ptr += help_line_len(ptr);
if (*ptr == '\n')
ptr++;
}
if (last_line > 0)
last_line--;
/* Redisplay if the text was scrolled or an invalid key was pressed. */
if (line != old_line || kbinput == ERR) {
blank_edit();
ptr = help_text;
/* Advance in the text to the first line to be displayed. */
for (i = 0; i < line; i++) {
ptr += help_line_len(ptr);
if (*ptr == '\n')
ptr++;
}
/* Now display as many lines as the window will hold. */
for (i = 0; i < editwinrows && *ptr != '\0'; i++) {
size_t j = help_line_len(ptr);
mvwaddnstr(edit, i, 0, ptr, j);
ptr += j;
if (*ptr == '\n')
ptr++;
}
}
wnoutrefresh(edit);
old_line = line;
lastmessage = HUSH;
kbinput = get_kbinput(edit);
#ifndef NANO_TINY
if (kbinput == KEY_WINCH) {
kbinput = ERR;
continue; /* Redraw the screen. */
}
#endif
#ifndef DISABLE_MOUSE
if (kbinput == KEY_MOUSE) {
int mouse_x, mouse_y;
get_mouseinput(&mouse_x, &mouse_y, TRUE);
continue; /* Redraw the screen. */
}
#endif
func = parse_help_input(&kbinput);
if (func == total_refresh) {
total_redraw();
} else if (func == do_up_void) {
if (line > 0)
line--;
} else if (func == do_down_void) {
if (line + (editwinrows - 1) < last_line)
line++;
} else if (func == do_page_up) {
if (line > editwinrows - 2)
line -= editwinrows - 2;
else
line = 0;
} else if (func == do_page_down) {
if (line + (editwinrows - 1) < last_line)
line += editwinrows - 2;
} else if (func == do_first_line) {
line = 0;
} else if (func == do_last_line) {
if (line + (editwinrows - 1) < last_line)
line = last_line - (editwinrows - 1);
} else if (func == do_exit) {
/* Exit from the help viewer. */
break;
} else
unbound_key(kbinput);
}
if (old_no_help) {
blank_bottombars();
wnoutrefresh(bottomwin);
currmenu = oldmenu;
SET(NO_HELP);
window_init();
} else
bottombars(oldmenu);
#ifndef DISABLE_BROWSER
if (oldmenu == MBROWSER || oldmenu == MWHEREISFILE || oldmenu == MGOTODIR)
browser_refresh();
else
#endif
edit_refresh();
/* We're exiting from the help screen. */
free(help_text);
}
/* Set width to the number of files that we can display per line, if
* necessary, and display the list of files. */
void browser_refresh(void)
{
size_t i;
int line = 0, col = 0;
/* The current line and column while the list is getting displayed. */
char *foo;
/* The additional information that we'll display about a file. */
/* Perhaps window dimensions have changed; reinitialize the browser. */
browser_init(path_save, opendir(path_save));
qsort(filelist, filelist_len, sizeof(char *), diralphasort);
/* Make sure the selected file is within range. */
if (selected >= filelist_len)
selected = filelist_len - 1;
titlebar(path_save);
blank_edit();
wmove(edit, 0, 0);
i = width * editwinrows * ((selected / width) / editwinrows);
for (; i < filelist_len && line < editwinrows; i++) {
struct stat st;
const char *filetail = tail(filelist[i]);
/* The filename we display, minus the path. */
size_t filetaillen = strlenpt(filetail);
/* The length of the filename in columns. */
size_t foolen;
/* The length of the file information in columns. */
int foomaxlen = 7;
/* The maximum length of the file information in
* columns: seven for "--", "(dir)", or the file size,
* and 12 for "(parent dir)". */
bool dots = (COLS >= 15 && filetaillen >= longest - foomaxlen);
/* Do we put an ellipsis before the filename? Don't set
* this to TRUE if we have fewer than 15 columns (i.e.
* one column for padding, plus seven columns for a
* filename other than ".."). */
char *disp = display_string(filetail, dots ? filetaillen -
longest + foomaxlen + 4 : 0, longest, FALSE);
/* If we put an ellipsis before the filename, reserve
* one column for padding, plus seven columns for "--",
* "(dir)", or the file size, plus three columns for the
* ellipsis. */
/* Start highlighting the currently selected file or directory. */
if (i == selected)
wattron(edit, hilite_attribute);
blank_line(edit, line, col, longest);
/* If dots is TRUE, we will display something like "...ename". */
if (dots)
mvwaddstr(edit, line, col, "...");
mvwaddstr(edit, line, dots ? col + 3 : col, disp);
free(disp);
col += longest;
/* Show information about the file. We don't want to report
* file sizes for links, so we use lstat(). */
if (lstat(filelist[i], &st) == -1 || S_ISLNK(st.st_mode)) {
/* If the file doesn't exist (i.e. it's been deleted while
* the file browser is open), or it's a symlink that doesn't
* point to a directory, display "--". */
if (stat(filelist[i], &st) == -1 || !S_ISDIR(st.st_mode))
foo = mallocstrcpy(NULL, "--");
/* If the file is a symlink that points to a directory,
* display it as a directory. */
else
/* TRANSLATORS: Try to keep this at most 7 characters. */
foo = mallocstrcpy(NULL, _("(dir)"));
} else if (S_ISDIR(st.st_mode)) {
/* If the file is a directory, display it as such. */
if (strcmp(filetail, "..") == 0) {
/* TRANSLATORS: Try to keep this at most 12 characters. */
foo = mallocstrcpy(NULL, _("(parent dir)"));
foomaxlen = 12;
} else
foo = mallocstrcpy(NULL, _("(dir)"));
} else {
unsigned long result = st.st_size;
char modifier;
foo = charalloc(foomaxlen + 1);
if (st.st_size < (1 << 10))
modifier = ' '; /* bytes */
else if (st.st_size < (1 << 20)) {
result >>= 10;
modifier = 'K'; /* kilobytes */
} else if (st.st_size < (1 << 30)) {
result >>= 20;
modifier = 'M'; /* megabytes */
} else {
/* Set width to the number of files that we can display per line, if
* necessary, and display the list of files. */
void browser_refresh(void)
{
size_t i;
int col = 0;
/* The maximum number of columns that the filenames will take up. */
int line = 0;
/* The maximum number of lines that the filenames will take up. */
std::string foo;
/* The file information that we'll display. */
blank_edit();
wmove(edit, 0, 0);
i = width * editwinrows * ((selected / width) / editwinrows);
for (; i < filelist.size() && line < editwinrows; i++) {
struct stat st;
std::string filetail = tail(filelist[i]);
/* The filename we display, minus the path. */
int foomaxlen = 7;
/* The maximum length of the file information in
* columns: seven for "--", "(dir)", or the file size,
* and 12 for "(parent dir)". */
bool dots = (COLS >= 15 && filetail.length() >= longest - foomaxlen);
/* Do we put an ellipsis before the filename? Don't set
* this to true if we have fewer than 15 columns (i.e.
* one column for padding, plus seven columns for a
* filename other than ".."). */
std::string disp = display_string(filetail, dots ? filetail.length() - longest + foomaxlen + 4 : 0, longest, false);
/* If we put an ellipsis before the filename, reserve one column
* for padding, plus seven columns for "--", "(dir)", or the file
* size, plus three columns for the ellipsis. */
/* Start highlighting the currently selected file or
* directory. */
if (i == selected) {
wattron(edit, highlight_attribute);
}
blank_line(edit, line, col, longest);
/* If dots is true, we will display something like "...ename". */
if (dots) {
mvwaddstr(edit, line, col, "...");
}
mvwaddstr(edit, line, dots ? col + 3 : col, disp.c_str());
col += longest;
/* Show information about the file. We don't want to report
* file sizes for links, so we use lstat(). */
if (lstat(filelist[i], &st) == -1 || S_ISLNK(st.st_mode)) {
/* If the file doesn't exist (i.e. it's been deleted while
* the file browser is open), or it's a symlink that doesn't
* point to a directory, display "--". */
if (stat(filelist[i], &st) == -1 || !S_ISDIR(st.st_mode)) {
foo = "--";
} else {
/* If the file is a symlink that points to a directory,
* display it as a directory. */
/* TRANSLATORS: Try to keep this at most 7
* characters. */
foo = _("(dir)");
}
} else if (S_ISDIR(st.st_mode)) {
/* If the file is a directory, display it as such. */
if (filetail == "..") {
/* TRANSLATORS: Try to keep this at most 12 characters. */
foo = _("(parent dir)");
foomaxlen = 12;
} else {
foo = _("(dir)");
}
} else {
unsigned long result = st.st_size;
char modifier;
foo = charalloc(foomaxlen + 1);
if (st.st_size < (1 << 10)) {
modifier = ' '; // bytes
} else if (st.st_size < (1 << 20)) {
result >>= 10;
modifier = 'K'; // kilobytes
} else if (st.st_size < (1 << 30)) {
result >>= 20;
modifier = 'M'; // megabytes
} else {
