Add & and ~ chdir shortcuts

& goes to the starting directory, ~ goes home.

sdn.cpp

@@ -297,27 +297,28 @@ static const char *g_ls_colors[] = {LS(XX)};
 #undef XX
 
 static struct {
-	string cwd;                         // Current working directory
-	vector<entry> entries;              // Current directory entries
-	int offset, cursor;                 // Scroll offset and cursor position
-	bool full_view;                     // Whether to show extended information
-	int max_widths[row::COLUMNS];       // Column widths
+	string cwd;                         ///< Current working directory
+	string start_dir;                   ///< Starting directory
+	vector<entry> entries;              ///< Current directory entries
+	int offset, cursor;                 ///< Scroll offset and cursor position
+	bool full_view;                     ///< Show extended information
+	int max_widths[row::COLUMNS];       ///< Column widths
 
-	string chosen;                      // Chosen item for the command line
-	bool chosen_full;                   // Use the full path
+	string chosen;                      ///< Chosen item for the command line
+	bool chosen_full;                   ///< Use the full path
 
-	int inotify_fd, inotify_wd = -1;    // File watch
-	bool out_of_date;                   // Entries may be out of date
+	int inotify_fd, inotify_wd = -1;    ///< File watch
+	bool out_of_date;                   ///< Entries may be out of date
 
-	wchar_t editor;                     // Prompt character for editing
-	wstring editor_line;                // Current user input
+	wchar_t editor;                     ///< Prompt character for editing
+	wstring editor_line;                ///< Current user input
 
 	enum { AT_CURSOR, AT_BAR, AT_CWD, AT_INPUT, AT_COUNT };
 	chtype attrs[AT_COUNT] = {A_REVERSE, 0, A_BOLD, 0};
 	const char *attr_names[AT_COUNT] = {"cursor", "bar", "cwd", "input"};
 
-	map<int, chtype> ls_colors;        // LS_COLORS decoded
-	map<string, chtype> ls_exts;       // LS_COLORS file extensions
+	map<int, chtype> ls_colors;         ///< LS_COLORS decoded
+	map<string, chtype> ls_exts;        ///< LS_COLORS file extensions
 } g;
 
 fun ls_format (const string &filename, const struct stat &info) -> chtype {
@@ -495,8 +496,9 @@ fun reload () {
 	if (g.inotify_wd != -1)
 		inotify_rm_watch (g.inotify_fd, g.inotify_wd);
 
+	// We don't show atime, so access and open are merely spam
 	g.inotify_wd = inotify_add_watch (g.inotify_fd, buf,
-		IN_ALL_EVENTS | IN_ONLYDIR);
+		(IN_ALL_EVENTS | IN_ONLYDIR | IN_EXCL_UNLINK) & ~(IN_ACCESS | IN_OPEN));
 }
 
 fun search (const wstring &needle) {
@@ -536,6 +538,16 @@ fun handle_editor (wint_t c, bool is_char) {
 		beep ();
 }
 
+fun change_dir (const string& path) {
+	if (chdir (path.c_str ())) {
+		beep ();
+	} else {
+		// TODO: remember cursor going down, then restore going up
+		g.cursor = 0;
+		reload ();
+	}
+}
+
 fun choose (const entry &entry) -> bool {
 	bool is_dir = S_ISDIR (entry.info.st_mode) != 0;
 	// Dive into directories and accessible symlinks to them
@@ -552,13 +564,7 @@ fun choose (const entry &entry) -> bool {
 		g.chosen = entry.filename;
 		return false;
 	}
-	if (chdir (entry.filename.c_str ())) {
-		beep ();
-	} else {
-		// TODO: remember cursor going down, then restore going up
-		g.cursor = 0;
-		reload ();
-	}
+	change_dir (entry.filename);
 	return true;
 }
 
@@ -616,6 +622,16 @@ fun handle (wint_t c, bool is_char) -> bool {
 	case CTRL L'e': g.offset++; break;
 	case CTRL L'y': g.offset--; break;
 
+	case '&':
+		change_dir (g.start_dir);
+		break;
+	case '~':
+		if (const auto *home = getenv ("HOME"))
+			change_dir (home);
+		else if (const auto *pw = getpwuid (getuid ()))
+			change_dir (pw->pw_dir);
+		break;
+
 	case L't':
 	case ALT | L't':
 		g.full_view = !g.full_view;
@@ -794,8 +810,8 @@ int main (int argc, char *argv[]) {
 
 	load_configuration ();
 	reload ();
+	g.start_dir = g.cwd;
 	update ();
-	auto start_dir = g.cwd;
 
 	wint_t c;
 	while (1) {
@@ -818,7 +834,7 @@ int main (int argc, char *argv[]) {
 		cout << "local insert=" << shell_escape (full_path) << endl;
 		return 0;
 	}
-	if (g.cwd != start_dir)
+	if (g.cwd != g.start_dir)
 		cout << "local cd=" << shell_escape (g.cwd) << endl;
 	if (!g.chosen.empty ())
 		cout << "local insert=" << shell_escape (g.chosen) << endl;