/* $Id$ */
/**************************************************************************
* browser.c *
* *
* Copyright (C) 2001-2004 Chris Allegretta *
* Copyright (C) 2005-2006 David Lawrence Ramsey *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2, or (at your option) *
* any later version. *
* *
* This program is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA *
* 02110-1301, USA. *
* *
**************************************************************************/
#include "proto.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#ifndef DISABLE_BROWSER
static char **filelist = NULL;
/* The list of files to display in the browser. */
static size_t filelist_len = 0;
/* The number of files in the list. */
static int width = 0;
/* The number of columns to display the list in. */
static int longest = 0;
/* The number of columns in the longest filename in the list. */
static size_t selected = 0;
/* The currently selected filename in the list. */
static bool search_last_file = FALSE;
/* Have we gone past the last file while searching? */
/* Our browser function. path is the path to start browsing from.
* Assume path has already been tilde-expanded. */
char *do_browser(char *path, DIR *dir)
{
int kbinput;
bool meta_key, func_key;
bool old_const_update = ISSET(CONST_UPDATE);
char *ans = mallocstrcpy(NULL, "");
/* The last answer the user typed on the statusbar. */
char *retval = NULL;
curs_set(0);
blank_statusbar();
#if !defined(DISABLE_HELP) || !defined(DISABLE_MOUSE)
currshortcut = browser_list;
#endif
bottombars(browser_list);
wnoutrefresh(bottomwin);
UNSET(CONST_UPDATE);
change_browser_directory:
/* We go here after the user selects a new directory. */
kbinput = ERR;
meta_key = FALSE;
func_key = FALSE;
width = 0;
selected = 0;
path = mallocstrassn(path, get_full_path(path));
/* Assume that path exists and ends with a slash. */
assert(path != NULL && path[strlen(path) - 1] == '/');
/* Get the list of files. */
browser_init(path, dir);
assert(filelist != NULL);
/* Sort the list. */
qsort(filelist, filelist_len, sizeof(char *), diralphasort);
titlebar(path);
do {
bool abort = FALSE;
struct stat st;
int i;
size_t fileline;
char *new_path;
/* Used by the "Go To Directory" prompt. */
#ifndef DISABLE_MOUSE
MEVENT mevent;
#endif
check_statusblank();
/* Compute the line number we're on now, so that we don't divide
* by 0. */
fileline = selected;
if (width != 0)
fileline /= width;
switch (kbinput) {
#ifndef DISABLE_MOUSE
case KEY_MOUSE:
if (getmouse(&mevent) == ERR)
break;
/* If we clicked in the edit window, we probably clicked
* on a file. */
if (wenclose(edit, mevent.y, mevent.x)) {
size_t old_selected = selected;
/* Subtract out the size of topwin. */
mevent.y -= 2 - no_more_space();
/* longest is the width of each column. There are
* two spaces between each column. */
selected = (fileline / editwinrows) * (editwinrows *
width) + (mevent.y * width) + (mevent.x /
(longest + 2));
/* If they clicked beyond the end of a row, select
* the end of that row. */
if (mevent.x > width * (longest + 2))
selected--;
/* If we're off the screen, reset to the last item.
* If we clicked the same place as last time, select
* this name! */
if (selected > filelist_len - 1)
selected = filelist_len - 1;
else if (old_selected == selected)
/* Put back the "Select" key, so that the file
* is selected. */
unget_kbinput(NANO_ENTER_KEY, FALSE, FALSE);
} else {
/* We must have clicked a shortcut. Put back the
* equivalent shortcut key. */
int mouse_x, mouse_y;
get_mouseinput(&mouse_x, &mouse_y, TRUE);
}
break;
#endif
case NANO_PREVLINE_KEY:
if (selected >= width)
selected -= width;
break;
case NANO_BACK_KEY:
if (selected > 0)
selected--;
break;
case NANO_NEXTLINE_KEY:
if (selected + width <= filelist_len - 1)
selected += width;
break;
case NANO_FORWARD_KEY:
if (selected < filelist_len - 1)
selected++;
break;
case NANO_PREVPAGE_KEY:
if (selected >= (editwinrows + fileline % editwinrows) *
width)
selected -= (editwinrows + fileline % editwinrows) *
width;
else
selected = 0;
break;
case NANO_NEXTPAGE_KEY:
selected += (editwinrows - fileline % editwinrows) *
width;
if (selected >= filelist_len)
selected = filelist_len - 1;
break;
case NANO_HELP_KEY:
#ifndef DISABLE_HELP
do_browser_help();
curs_set(0);
#else
nano_disabled_msg();
#endif
break;
case NANO_ENTER_KEY:
/* You can't move up from "/". */
if (strcmp(filelist[selected], "/..") == 0) {
statusbar(_("Can't move up a directory"));
beep();
break;
}
#ifndef DISABLE_OPERATINGDIR
/* Note: the selected file can be outside the operating
* directory if it's ".." or if it's a symlink to a
* directory outside the operating directory. */
if (check_operating_dir(filelist[selected], FALSE)) {
statusbar(
_("Can't go outside of %s in restricted mode"),
operating_dir);
beep();
break;
}
#endif
if (stat(filelist[selected], &st) == -1) {
/* We can't open this file for some reason.
* Complain. */
statusbar(_("Error reading %s: %s"),
filelist[selected], strerror(errno));
beep();
break;
}
if (!S_ISDIR(st.st_mode)) {
retval = mallocstrcpy(retval, filelist[selected]);
abort = TRUE;
break;
}
dir = opendir(filelist[selected]);
if (dir == NULL) {
/* We can't open this dir for some reason.
* Complain. */
statusbar(_("Error reading %s: %s"),
filelist[selected], strerror(errno));
beep();
break;
}
path = mallocstrcpy(path, filelist[selected]);
/* Start over again with the new path value. */
free_chararray(filelist, filelist_len);
goto change_browser_directory;
/* Redraw the screen. */
case NANO_REFRESH_KEY:
total_redraw();
break;
/* Search for a filename. */
case NANO_WHEREIS_KEY:
curs_set(1);
do_filesearch();
curs_set(0);
break;
/* Search for another filename. */
case NANO_WHEREIS_NEXT_KEY:
do_fileresearch();
break;
/* Go to a specific directory. */
case NANO_GOTOLINE_KEY:
curs_set(1);
i = do_prompt(TRUE,
#ifndef DISABLE_TABCOMP
FALSE,
#endif
gotodir_list, ans,
#ifndef NANO_TINY
NULL,
#endif
browser_refresh, _("Go To Directory"));
curs_set(0);
#if !defined(DISABLE_HELP) || !defined(DISABLE_MOUSE)
currshortcut = browser_list;
#endif
bottombars(browser_list);
if (i < 0) {
/* We canceled. Indicate that on the statusbar, and
* blank out ans, since we're done with it. */
statusbar(_("Cancelled"));
ans = mallocstrcpy(ans, "");
break;
} else if (i != 0) {
/* Put back the "Go to Directory" key and save
* answer in ans, so that the file list is displayed
* again, the prompt is displayed again, and what we
* typed before at the prompt is displayed again. */
unget_kbinput(NANO_GOTOLINE_KEY, FALSE, FALSE);
ans = mallocstrcpy(ans, answer);
break;
}
/* We have a directory. Blank out ans, since we're done
* with it. */
ans = mallocstrcpy(ans, "");
new_path = real_dir_from_tilde(answer);
if (new_path[0] != '/') {
new_path = charealloc(new_path, strlen(path) +
strlen(answer) + 1);
sprintf(new_path, "%s%s", path, answer);
}
#ifndef DISABLE_OPERATINGDIR
if (check_operating_dir(new_path, FALSE)) {
statusbar(
_("Can't go outside of %s in restricted mode"),
operating_dir);
free(new_path);
break;
}
#endif
dir = opendir(new_path);
if (dir == NULL) {
/* We can't open this dir for some reason.
* Complain. */
statusbar(_("Error reading %s: %s"), answer,
strerror(errno));
beep();
free(new_path);
break;
}
/* Start over again with the new path value. */
free(path);
path = new_path;
free_chararray(filelist, filelist_len);
goto change_browser_directory;
/* Abort the browser. */
case NANO_EXIT_KEY:
abort = TRUE;
break;
}
if (abort)
break;
browser_refresh();
kbinput = get_kbinput(edit, &meta_key, &func_key);
parse_browser_input(&kbinput, &meta_key, &func_key);
} while (kbinput != NANO_EXIT_KEY);
blank_edit();
titlebar(NULL);
edit_refresh();
curs_set(1);
if (old_const_update)
SET(CONST_UPDATE);
/* Clean up. */
free(path);
free(ans);
free_chararray(filelist, filelist_len);
return retval;
}
/* The file browser front end. We check to see if inpath has a dir in
* it. If it does, we start do_browser() from there. Otherwise, we
* start do_browser() from the current directory. */
char *do_browse_from(const char *inpath)
{
struct stat st;
char *path;
/* This holds the tilde-expanded version of inpath. */
DIR *dir = NULL;
assert(inpath != NULL);
path = real_dir_from_tilde(inpath);
/* Perhaps path is a directory. If so, we'll pass it to
* do_browser(). Or perhaps path is a directory / a file. If so,
* we'll try stripping off the last path element and passing it to
* do_browser(). Or perhaps path doesn't have a directory portion
* at all. If so, we'll just pass the current directory to
* do_browser(). */
if (stat(path, &st) == -1 || !S_ISDIR(st.st_mode)) {
striponedir(path);
if (stat(path, &st) == -1 || !S_ISDIR(st.st_mode)) {
free(path);
path = charalloc(PATH_MAX + 1);
path = getcwd(path, PATH_MAX + 1);
if (path != NULL)
align(&path);
}
}
#ifndef DISABLE_OPERATINGDIR
/* If the resulting path isn't in the operating directory, use
* the operating directory instead. */
if (check_operating_dir(path, FALSE)) {
if (path != NULL)
free(path);
path = mallocstrcpy(NULL, operating_dir);
}
#endif
if (path != NULL)
dir = opendir(path);
if (dir == NULL) {
beep();
free(path);
return NULL;
}
return do_browser(path, dir);
}
/* Set filelist to the list of files contained in the directory path,
* set filelist_len to the number of files in that list, and set longest
* to the width in columns of the longest filename in that list, up to
* COLS - 1 (but at least 7). Assume path exists and is a directory. */
void browser_init(const char *path, DIR *dir)
{
const struct dirent *nextdir;
size_t i = 0, path_len;
assert(dir != NULL);
longest = 0;
while ((nextdir = readdir(dir)) != NULL) {
size_t d_len;
/* Don't show the "." entry. */
if (strcmp(nextdir->d_name, ".") == 0)
continue;
i++;
d_len = strlenpt(nextdir->d_name);
if (d_len > longest)
longest = (d_len > COLS - 1) ? COLS - 1 : d_len;
}
filelist_len = i;
rewinddir(dir);
longest += 10;
filelist = (char **)nmalloc(filelist_len * sizeof(char *));
path_len = strlen(path);
i = 0;
while ((nextdir = readdir(dir)) != NULL && i < filelist_len) {
/* Don't show the "." entry. */
if (strcmp(nextdir->d_name, ".") == 0)
continue;
filelist[i] = charalloc(path_len + strlen(nextdir->d_name) + 1);
sprintf(filelist[i], "%s%s", path, nextdir->d_name);
i++;
}
/* Maybe the number of files in the directory changed between the
* first time we scanned and the second. i is the actual length of
* filelist, so record it. */
filelist_len = i;
closedir(dir);
if (longest > COLS - 1)
longest = COLS - 1;
if (longest < 7)
longest = 7;
}
/* Determine the shortcut key corresponding to the values of kbinput
* (the key itself), meta_key (whether the key is a meta sequence), and
* func_key (whether the key is a function key), if any. In the
* process, convert certain non-shortcut keys used by e.g. Pico's file
* browser into their corresponding shortcut keys. */
void parse_browser_input(int *kbinput, bool *meta_key, bool *func_key)
{
get_shortcut(browser_list, kbinput, meta_key, func_key);
/* Pico compatibility. */
if (*meta_key == FALSE && *func_key == FALSE) {
switch (*kbinput) {
case ' ':
*kbinput = NANO_NEXTPAGE_KEY;
break;
case '-':
*kbinput = NANO_PREVPAGE_KEY;
break;
case '?':
*kbinput = NANO_HELP_KEY;
break;
/* Cancel is equivalent to Exit here. */
case NANO_CANCEL_KEY:
case 'E':
case 'e':
*kbinput = NANO_EXIT_KEY;
break;
case 'G':
case 'g':
*kbinput = NANO_GOTOLINE_KEY;
break;
case 'S':
case 's':
*kbinput = NANO_ENTER_KEY;
break;
case 'W':
case 'w':
*kbinput = NANO_WHEREIS_KEY;
break;
}
}
}
/* Calculate the number of columns needed to display the list of files
* in the array filelist, if necessary, and then display the list of
* files. */
void browser_refresh(void)
{
struct stat st;
int i;
int col = 0, filecols = 0, editline = 0;
size_t foo_len = mb_cur_max() * 7;
char *foo = charalloc(foo_len + 1);
i = (width != 0) ? width * editwinrows * ((selected / width) /
editwinrows) : 0;
blank_edit();
wmove(edit, 0, 0);
for (; i < filelist_len && editline <= editwinrows - 1; i++) {
char *disp = display_string(tail(filelist[i]), 0, longest,
FALSE);
/* Highlight the currently selected file/dir. */
if (i == selected)
wattron(edit, A_REVERSE);
blank_line(edit, editline, col, longest);
mvwaddstr(edit, editline, col, disp);
free(disp);
col += longest;
filecols++;
/* Show file info also. We don't want to report file sizes for
* links, so we use lstat(). Also, stat() and lstat() return an
* error if, for example, the file is deleted while the file
* browser is open. In that case, we report "--" as the file
* info. */
if (lstat(filelist[i], &st) == -1 || S_ISLNK(st.st_mode)) {
/* Aha! It's a symlink! Now, is it a dir? If so, mark it
* as such. */
if (stat(filelist[i], &st) == 0 && S_ISDIR(st.st_mode)) {
strncpy(foo, _("(dir)"), foo_len);
foo[foo_len] = '\0';
} else
strcpy(foo, "--");
} else if (S_ISDIR(st.st_mode)) {
strncpy(foo, _("(dir)"), foo_len);
foo[foo_len] = '\0';
} else if (st.st_size < (1 << 10)) /* less than 1 k. */
sprintf(foo, "%4u B", (unsigned int)st.st_size);
else if (st.st_size < (1 << 20)) /* less than 1 meg. */
sprintf(foo, "%4u KB", (unsigned int)(st.st_size >> 10));
else if (st.st_size < (1 << 30)) /* less than 1 gig. */
sprintf(foo, "%4u MB", (unsigned int)(st.st_size >> 20));
else
sprintf(foo, "%4u GB", (unsigned int)(st.st_size >> 30));
mvwaddnstr(edit, editline, col - strlen(foo), foo, foo_len);
if (i == selected)
wattroff(edit, A_REVERSE);
/* Add some space between the columns. */
col += 2;
/* If the next entry isn't going to fit on the line,
* move to the next line. */
if (col > COLS - longest) {
editline++;
col = 0;
/* Set the number of columns to display the list in, if
* necessary, so that we don't divide by 0. */
if (width == 0)
width = filecols;
}
wmove(edit, editline, col);
}
free(foo);
wnoutrefresh(edit);
}
/* Set up the system variables for a filename search. Return -1 if the
* search should be canceled (due to Cancel, a blank search string, or a
* failed regcomp()), return 0 on success, and return 1 on rerun calling
* program. */
int filesearch_init(void)
{
int i = 0;
char *buf;
static char *backupstring = NULL;
/* The search string we'll be using. */
/* If backupstring doesn't exist, initialize it to "". */
if (backupstring == NULL)
backupstring = mallocstrcpy(NULL, "");
/* We display the search prompt below. If the user types a partial
* search string and then Replace or a toggle, we will return to
* do_search() or do_replace() and be called again. In that case,
* we should put the same search string back up. */
search_init_globals();
if (last_search[0] != '\0') {
char *disp = display_string(last_search, 0, COLS / 3, FALSE);
buf = charalloc(strlen(disp) + 7);
/* We use (COLS / 3) here because we need to see more on the
* line. */
sprintf(buf, " [%s%s]", disp,
(strlenpt(last_search) > COLS / 3) ? "..." : "");
free(disp);
} else
buf = mallocstrcpy(NULL, "");
/* This is now one simple call. It just does a lot. */
i = do_prompt(FALSE,
#ifndef DISABLE_TABCOMP
TRUE,
#endif
whereis_file_list, backupstring,
#ifndef NANO_TINY
&search_history,
#endif
browser_refresh, "%s%s%s%s%s%s", _("Search"),
#ifndef NANO_TINY
/* This string is just a modifier for the search prompt; no
* grammar is implied. */
ISSET(CASE_SENSITIVE) ? _(" [Case Sensitive]") :
#endif
"",
#ifdef HAVE_REGEX_H
/* This string is just a modifier for the search prompt; no
* grammar is implied. */
ISSET(USE_REGEXP) ? _(" [Regexp]") :
#endif
"",
#ifndef NANO_TINY
/* This string is just a modifier for the search prompt; no
* grammar is implied. */
ISSET(BACKWARDS_SEARCH) ? _(" [Backwards]") :
#endif
"", "", buf);
/* Release buf now that we don't need it anymore. */
free(buf);
free(backupstring);
backupstring = NULL;
/* Cancel any search, or just return with no previous search. */
if (i == -1 || (i < 0 && last_search[0] == '\0') ||
(i == 0 && answer[0] == '\0')) {
statusbar(_("Cancelled"));
return -1;
} else {
switch (i) {
case -2: /* It's an empty string. */
case 0: /* It's a new string. */
#ifdef HAVE_REGEX_H
/* Use last_search if answer is an empty string, or
* answer if it isn't. */
if (ISSET(USE_REGEXP) &&
regexp_init((i == -2) ? last_search :
answer) == 0)
return -1;
#endif
break;
#ifndef NANO_TINY
case TOGGLE_CASE_KEY:
TOGGLE(CASE_SENSITIVE);
backupstring = mallocstrcpy(backupstring, answer);
return 1;
case TOGGLE_BACKWARDS_KEY:
TOGGLE(BACKWARDS_SEARCH);
backupstring = mallocstrcpy(backupstring, answer);
return 1;
#endif
#ifdef HAVE_REGEX_H
case NANO_REGEXP_KEY:
TOGGLE(USE_REGEXP);
backupstring = mallocstrcpy(backupstring, answer);
return 1;
#endif
default:
return -1;
}
}
return 0;
}
/* Look for needle. If no_sameline is TRUE, skip over selected when
* looking for needle. begin is the location of the filename where we
* first started searching. The return value specifies whether we found
* anything. */
bool findnextfile(bool no_sameline, size_t begin, const char *needle)
{
size_t currselected = selected;
/* The location in the current file list of the match we
* find. */
const char *rev_start = tail(filelist[currselected]), *found = NULL;
#ifndef NANO_TINY
if (ISSET(BACKWARDS_SEARCH))
rev_start += strlen(tail(filelist[currselected]));
#endif
/* Look for needle in the current filename we're searching. */
while (TRUE) {
found = strstrwrapper(tail(filelist[currselected]), needle,
rev_start);
/* We've found a potential match. If we're not allowed to find
* a match on the same filename we started on and this potential
* match is on that line, continue searching. */
if (found != NULL && (!no_sameline || currselected != begin))
break;
/* We've finished processing the filenames, so get out. */
if (search_last_file) {
not_found_msg(needle);
return FALSE;
}
/* Move to the previous or next filename in the list. If we've
* reached the start or end of the list, wrap around. */
#ifndef NANO_TINY
if (ISSET(BACKWARDS_SEARCH)) {
if (currselected > 0)
currselected--;
else {
currselected = filelist_len - 1;
statusbar(_("Search Wrapped"));
}
} else {
#endif
if (currselected < filelist_len - 1)
currselected++;
else {
currselected = 0;
statusbar(_("Search Wrapped"));
}
#ifndef NANO_TINY
}
#endif
/* We've reached the original starting file. */
if (currselected == begin)
search_last_file = TRUE;
rev_start = tail(filelist[currselected]);
#ifndef NANO_TINY
if (ISSET(BACKWARDS_SEARCH))
rev_start += strlen(tail(filelist[currselected]));
#endif
}
/* We've definitely found something. */
selected = currselected;
return TRUE;
}
/* Clear the flag indicating that a search reached the last file in the
* list. We need to do this just before a new search. */
void findnextfile_wrap_reset(void)
{
search_last_file = FALSE;
}
/* Abort the current filename search. Clean up by setting the current
* shortcut list to the browser shortcut list, displaying it, and
* decompiling the compiled regular expression we used in the last
* search, if any. */
void filesearch_abort(void)
{
currshortcut = browser_list;
bottombars(browser_list);
#ifdef HAVE_REGEX_H
regexp_cleanup();
#endif
}
/* Search for a filename. */
void do_filesearch(void)
{
size_t begin = selected;
int i;
bool didfind;
i = filesearch_init();
if (i == -1) /* Cancel, blank search string, or regcomp()
* failed. */
filesearch_abort();
#if !defined(NANO_TINY) || defined(HAVE_REGEX_H)
else if (i == 1) /* Case Sensitive, Backwards, or Regexp search
* toggle. */
do_filesearch();
#endif
if (i != 0)
return;
/* If answer is now "", copy last_search into answer. */
if (answer[0] == '\0')
answer = mallocstrcpy(answer, last_search);
else
last_search = mallocstrcpy(last_search, answer);
#ifndef NANO_TINY
/* If answer is not "", add this search string to the search history
* list. */
if (answer[0] != '\0')
update_history(&search_history, answer);
#endif
findnextfile_wrap_reset();
didfind = findnextfile(FALSE, begin, answer);
/* Check to see if there's only one occurrence of the string and
* we're on it now. */
if (selected == begin && didfind) {
/* Do the search again, skipping over the current line. We
* should only end up back at the same position if the string
* isn't found again, in which case it's the only occurrence. */
didfind = findnextfile(TRUE, begin, answer);
if (selected == begin && !didfind)
statusbar(_("This is the only occurrence"));
}
filesearch_abort();
}
/* Search for the last filename without prompting. */
void do_fileresearch(void)
{
size_t begin = selected;
bool didfind;
search_init_globals();
if (last_search[0] != '\0') {
#ifdef HAVE_REGEX_H
/* Since answer is "", use last_search! */
if (ISSET(USE_REGEXP) && regexp_init(last_search) == 0)
return;
#endif
findnextfile_wrap_reset();
didfind = findnextfile(FALSE, begin, answer);
/* Check to see if there's only one occurrence of the string and
* we're on it now. */
if (selected == begin && didfind) {
/* Do the search again, skipping over the current line. We
* should only end up back at the same position if the
* string isn't found again, in which case it's the only
* occurrence. */
didfind = findnextfile(TRUE, begin, answer);
if (selected == begin && !didfind)
statusbar(_("This is the only occurrence"));
}
} else
statusbar(_("No current search pattern"));
filesearch_abort();
}
void do_first_file(void)
{
selected = 0;
}
void do_last_file(void)
{
selected = filelist_len - 1;
}
/* Strip one directory from the end of path. */
void striponedir(char *path)
{
char *tmp;
assert(path != NULL);
tmp = strrchr(path, '/');
if (tmp != NULL)
*tmp = '\0';
}
#endif /* !DISABLE_BROWSER */