Repository: gokcehan/lf
Pull request #842 (2022-05-21 12:18:10)

Implement directory previews
Implementation for #701.

Added option `dirpreviews`. When enabled, the selected directory is passed to previewer script.

Implementation essentially just adds another channel for directory previews `dirPreviewChan` and a corresponding goroutine `dirPreviewLoop` which work in the same manner as preview functionality for regular files. 

(BTW: my first PR here, love the project so wanted to contribute with this as it seemed like a gentle introduction to the codebase)


Patch:
diff --git a/README.md b/README.md
index 70e705a..4e4e19d 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ See [faq](https://github.com/gokcehan/lf/wiki/FAQ) for more information and [tut
 
 ## Features
 
-- Cross-platform (Linux, MacOS, BSDs, Windows)
+- Cross-platform (Linux, macOS, BSDs, Windows)
 - Single binary without any runtime dependencies
 - Fast startup and low memory footprint due to native code and static binaries
 - Asynchronous IO operations to avoid UI locking
diff --git a/app.go b/app.go
index 5ef53f3..b77d146 100644
--- a/app.go
+++ b/app.go
@@ -59,8 +59,10 @@ func newApp(ui *ui, nav *nav) *app {
 }
 
 func (app *app) quit() {
-	if err := app.writeHistory(); err != nil {
-		log.Printf("writing history file: %s", err)
+	if gOpts.history {
+		if err := app.writeHistory(); err != nil {
+			log.Printf("writing history file: %s", err)
+		}
 	}
 	if !gSingleMode {
 		if err := remote(fmt.Sprintf("drop %d", gClientID)); err != nil {
@@ -237,6 +239,7 @@ func (app *app) writeHistory() error {
 // separate goroutines and sent here for update.
 func (app *app) loop() {
 	go app.nav.previewLoop(app.ui)
+	go app.nav.dirPreviewLoop(app.ui)
 
 	var serverChan <-chan expr
 	if !gSingleMode {
@@ -318,6 +321,7 @@ func (app *app) loop() {
 			app.quit()
 
 			app.nav.previewChan <- ""
+			app.nav.dirPreviewChan <- nil
 
 			log.Print("bye!")
 
@@ -382,6 +386,7 @@ func (app *app) loop() {
 			}
 			app.ui.draw(app.nav)
 		case d := <-app.nav.dirChan:
+
 			app.nav.checkDir(d)
 
 			if gOpts.dircache {
@@ -482,6 +487,8 @@ func (app *app) runShell(s string, args []string, prefix string) {
 		cmd.Stderr = os.Stderr
 
 		app.nav.previewChan <- ""
+		app.nav.dirPreviewChan <- nil
+
 		if err := app.ui.suspend(); err != nil {
 			log.Printf("suspend: %s", err)
 		}
diff --git a/colors.go b/colors.go
index 949a98e..e76e5d8 100644
--- a/colors.go
+++ b/colors.go
@@ -110,6 +110,8 @@ func applyAnsiCodes(s string, st tcell.Style) tcell.Style {
 			st = st.Bold(true)
 		case n == 2:
 			st = st.Dim(true)
+		case n == 3:
+			st = st.Italic(true)
 		case n == 4:
 			st = st.Underline(true)
 		case n == 5 || n == 6:
@@ -319,7 +321,7 @@ func (sm styleMap) get(f *file) tcell.Style {
 		return val
 	}
 
-	if val, ok := sm["*"+f.ext]; ok {
+	if val, ok := sm["*"+strings.ToLower(f.ext)]; ok {
 		return val
 	}
 
diff --git a/complete.go b/complete.go
index c48b35c..5b770ee 100644
--- a/complete.go
+++ b/complete.go
@@ -13,7 +13,9 @@ var (
 	gCmdWords = []string{
 		"set",
 		"map",
+		"cmap",
 		"cmd",
+		"quit",
 		"up",
 		"half-up",
 		"page-up",
@@ -24,20 +26,38 @@ var (
 		"scroll-down",
 		"updir",
 		"open",
-		"quit",
+		"jump-next",
+		"jump-prev",
 		"top",
 		"bottom",
+		"high",
+		"middle",
+		"low",
 		"toggle",
 		"invert",
 		"unselect",
+		"glob-select",
+		"glob-unselect",
+		"calcdirsize",
 		"copy",
 		"cut",
 		"paste",
 		"clear",
+		"sync",
+		"draw",
 		"redraw",
+		"load",
 		"reload",
-		"read",
+		"echo",
+		"echomsg",
+		"echoerr",
+		"cd",
+		"select",
+		"delete",
 		"rename",
+		"source",
+		"push",
+		"read",
 		"shell",
 		"shell-pipe",
 		"shell-wait",
@@ -53,24 +73,37 @@ var (
 		"filter",
 		"setfilter",
 		"mark-save",
-		"mark-remove",
 		"mark-load",
-		"draw",
-		"load",
-		"sync",
-		"echo",
-		"echomsg",
-		"echoerr",
-		"cd",
-		"calcdirsize",
-		"select",
-		"glob-select",
-		"glob-unselect",
-		"source",
-		"push",
-		"delete",
+		"mark-remove",
 		"tag",
 		"tag-toggle",
+		"cmd-escape",
+		"cmd-complete",
+		"cmd-menu-complete",
+		"cmd-menu-complete-back",
+		"cmd-menu-accept",
+		"cmd-enter",
+		"cmd-interrupt",
+		"cmd-history-next",
+		"cmd-history-prev",
+		"cmd-left",
+		"cmd-right",
+		"cmd-home",
+		"cmd-end",
+		"cmd-delete",
+		"cmd-delete-back",
+		"cmd-delete-home",
+		"cmd-delete-end",
+		"cmd-delete-unix-word",
+		"cmd-yank",
+		"cmd-transpose",
+		"cmd-transpose-word",
+		"cmd-word",
+		"cmd-word-back",
+		"cmd-delete-word",
+		"cmd-capitalize-word",
+		"cmd-uppercase-word",
+		"cmd-lowercase-word",
 	}
 
 	gOptWords = []string{
@@ -90,6 +123,7 @@ var (
 		"nodirfirst",
 		"dirfirst!",
 		"dironly",
+		"dirpreviews",
 		"nodironly",
 		"dironly!",
 		"drawbox",
@@ -151,6 +185,7 @@ var (
 		"errorfmt",
 		"filesep",
 		"hiddenfiles",
+		"history",
 		"ifs",
 		"info",
 		"previewer",
@@ -170,7 +205,7 @@ var (
 	}
 )
 
-func matchLongest(s1, s2 string) string {
+func matchLongest(s1, s2 []rune) []rune {
 	i := 0
 	for ; i < len(s1) && i < len(s2); i++ {
 		if s1[i] != s2[i] {
@@ -180,28 +215,28 @@ func matchLongest(s1, s2 string) string {
 	return s1[:i]
 }
 
-func matchWord(s string, words []string) (matches []string, longest string) {
+func matchWord(s string, words []string) (matches []string, longest []rune) {
 	for _, w := range words {
 		if !strings.HasPrefix(w, s) {
 			continue
 		}
 
 		matches = append(matches, w)
-		if longest != "" {
-			longest = matchLongest(longest, w)
+		if len(longest) != 0 {
+			longest = matchLongest(longest, []rune(w))
 		} else if s != "" {
-			longest = w + " "
+			longest = []rune(w + " ")
 		}
 	}
 
-	if longest == "" {
-		longest = s
+	if len(longest) == 0 {
+		longest = []rune(s)
 	}
 
 	return
 }
 
-func matchExec(s string) (matches []string, longest string) {
+func matchExec(s string) (matches []string, longest []rune) {
 	var words []string
 
 	paths := strings.Split(envPath, string(filepath.ListSeparator))
@@ -251,7 +286,8 @@ func matchExec(s string) (matches []string, longest string) {
 	return matchWord(s, words)
 }
 
-func matchFile(s string) (matches []string, longest string) {
+func matchFile(s string) (matches []string, longest []rune) {
+	s = unescape(s)
 	dir := replaceTilde(s)
 
 	if !filepath.IsAbs(dir) {
@@ -263,7 +299,7 @@ func matchFile(s string) (matches []string, longest string) {
 		}
 	}
 
-	dir = unescape(filepath.Dir(dir))
+	dir = filepath.Dir(dir)
 
 	files, err := ioutil.ReadDir(dir)
 	if err != nil {
@@ -272,25 +308,20 @@ func matchFile(s string) (matches []string, longest string) {
 
 	for _, f := range files {
 		name := filepath.Join(dir, f.Name())
-		f, err := os.Stat(name)
+		f, err := os.Lstat(name)
 		if err != nil {
-			fl, err := os.Lstat(name)
-			if err == nil && fl.Mode()&os.ModeSymlink != 0 {
-				continue
-			} else {
-				log.Printf("getting file information: %s", err)
-				return
-			}
+			log.Printf("getting file information: %s", err)
+			continue
 		}
 
 		_, last := filepath.Split(s)
-		if !strings.HasPrefix(escape(f.Name()), last) {
+		if !strings.HasPrefix(f.Name(), last) {
 			continue
 		}
 
 		name = f.Name()
 		if isRoot(s) || filepath.Base(s) != s {
-			name = filepath.Join(filepath.Dir(unescape(s)), f.Name())
+			name = filepath.Join(filepath.Dir(s), f.Name())
 		}
 		name = escape(name)
 
@@ -300,66 +331,79 @@ func matchFile(s string) (matches []string, longest string) {
 		}
 		matches = append(matches, item)
 
-		if longest != "" {
-			longest = matchLongest(longest, name)
+		if len(longest) != 0 {
+			longest = matchLongest(longest, []rune(name))
 		} else if s != "" {
 			if f.Mode().IsRegular() {
-				longest = name + " "
+				longest = []rune(name + " ")
 			} else {
-				longest = name + escape(string(filepath.Separator))
+				longest = []rune(name + escape(string(filepath.Separator)))
 			}
 		}
 	}
 
-	if longest == "" {
-		longest = s
+	if len(longest) == 0 {
+		longest = []rune(s)
 	}
 
 	return
 }
 
+func matchCmd(s string) (matches []string, longest []rune) {
+	words := gCmdWords
+	for c := range gOpts.cmds {
+		words = append(words, c)
+	}
+	sort.Strings(words)
+	j := 0
+	for i := 1; i < len(words); i++ {
+		if words[j] == words[i] {
+			continue
+		}
+		j++
+		words[i], words[j] = words[j], words[i]
+	}
+	words = words[:j+1]
+	matches, longest = matchWord(s, words)
+	return
+}
+
 func completeCmd(acc []rune) (matches []string, longestAcc []rune) {
 	s := string(acc)
 	f := tokenize(s)
 
-	var longest string
+	var longest []rune
 
 	switch len(f) {
 	case 1:
-		words := gCmdWords
-		for c := range gOpts.cmds {
-			words = append(words, c)
-		}
-		sort.Strings(words)
-		j := 0
-		for i := 1; i < len(words); i++ {
-			if words[j] == words[i] {
-				continue
-			}
-			j++
-			words[i], words[j] = words[j], words[i]
-		}
-		words = words[:j+1]
-		matches, longest = matchWord(s, words)
-		longestAcc = []rune(longest)
+		matches, longestAcc = matchCmd(s)
 	case 2:
 		switch f[0] {
 		case "set":
 			matches, longest = matchWord(f[1], gOptWords)
-			longestAcc = append(acc[:len(acc)-len(f[len(f)-1])], []rune(longest)...)
-		case "map", "cmd":
+			longestAcc = append(acc[:len(acc)-len([]rune(f[len(f)-1]))], longest...)
+		case "map", "cmap", "cmd":
 			longestAcc = acc
 		default:
 			matches, longest = matchFile(f[len(f)-1])
-			longestAcc = append(acc[:len(acc)-len(f[len(f)-1])], []rune(longest)...)
+			longestAcc = append(acc[:len(acc)-len([]rune(f[len(f)-1]))], longest...)
+		}
+	case 3:
+		switch f[0] {
+		case "map", "cmap":
+			matches, longest = matchCmd(f[2])
+			longestAcc = append(acc[:len(acc)-len([]rune(f[len(f)-1]))], longest...)
+		default:
+			matches, longest = matchFile(f[len(f)-1])
+			longestAcc = append(acc[:len(acc)-len([]rune(f[len(f)-1]))], longest...)
 		}
 	default:
 		switch f[0] {
-		case "set", "map", "cmd":
+		case "set", "map", "cmap", "cmd":
 			longestAcc = acc
 		default:
 			matches, longest = matchFile(f[len(f)-1])
-			longestAcc = append(acc[:len(acc)-len(f[len(f)-1])], []rune(longest)...)
+			longestAcc = append(acc[:len(acc)-len([]rune(f[len(f)-1]))], longest...)
 		}
 	}
 
@@ -379,8 +423,6 @@ func completeFile(acc []rune) (matches []string, longestAcc []rune) {
 		log.Printf("reading directory: %s", err)
 	}
 
-	var longest string
-
 	for _, f := range files {
 		if !strings.HasPrefix(f.Name(), s) {
 			continue
@@ -388,19 +430,17 @@ func completeFile(acc []rune) (matches []string, longestAcc []rune) {
 
 		matches = append(matches, f.Name())
 
-		if longest != "" {
-			longest = matchLongest(longest, f.Name())
+		if len(longestAcc) != 0 {
+			longestAcc = matchLongest(longestAcc, []rune(f.Name()))
 		} else if s != "" {
-			longest = f.Name()
+			longestAcc = []rune(f.Name())
 		}
 	}
 
-	if longest == "" {
-		longest = s
+	if len(longestAcc) == 0 {
+		longestAcc = acc
 	}
 
-	longestAcc = []rune(longest)
-
 	return
 }
 
@@ -408,15 +448,14 @@ func completeShell(acc []rune) (matches []string, longestAcc []rune) {
 	s := string(acc)
 	f := tokenize(s)
 
-	var longest string
+	var longest []rune
 
 	switch len(f) {
 	case 1:
-		matches, longest = matchExec(s)
-		longestAcc = []rune(longest)
+		matches, longestAcc = matchExec(s)
 	default:
 		matches, longest = matchFile(f[len(f)-1])
-		longestAcc = append(acc[:len(acc)-len([]rune(f[len(f)-1]))], []rune(longest)...)
+		longestAcc = append(acc[:len(acc)-len([]rune(f[len(f)-1]))], longest...)
 	}
 
 	return
diff --git a/doc.go b/doc.go
index 1704fcb..bdfe834 100644
--- a/doc.go
+++ b/doc.go
@@ -85,6 +85,7 @@ The following command line commands are provided by lf:
     cmd-complete             (default '<tab>')
     cmd-menu-complete
     cmd-menu-complete-back
+    cmd-menu-accept
     cmd-enter                (default '<c-j>' and '<enter>')
     cmd-interrupt            (default '<c-c>')
     cmd-history-next         (default '<c-n>')
@@ -117,6 +118,7 @@ The following options can be used to customize the behavior of lf:
     dircounts      bool      (default off)
     dirfirst       bool      (default on)
     dironly        bool      (default off)
+    dirpreviews    bool      (default off)
     drawbox        bool      (default off)
     errorfmt       string    (default "\033[7;31;47m%s\033[0m")
     filesep        string    (default "\n")
@@ -124,6 +126,7 @@ The following options can be used to customize the behavior of lf:
     globsearch     bool      (default off)
     hidden         bool      (default off)
     hiddenfiles    []string  (default '.*')
+    history        bool      (default on)
     icons          bool      (default off)
     ifs            string    (default '')
     ignorecase     bool      (default on)
@@ -491,6 +494,10 @@ Autocomplete the current word with menu selection.
 You need to assign keys to these commands (e.g. 'cmap <tab> cmd-menu-complete; cmap <backtab> cmd-menu-complete-back').
 You can use the assigned keys assigned to display the menu and then cycle through completion options.
 
+    cmd-menu-accept
+
+Accept the currently selected match in menu completion and close the menu.
+
     cmd-enter                (default '<c-j>' and '<enter>')
 
 Execute the current line.
@@ -570,7 +577,7 @@ Automatically quit server when there are no clients left connected.
 Set the path of a cleaner file.
 The file should be executable.
 This file is called if previewing is enabled, the previewer is set, and the previously selected file had its preview cache disabled.
-One argument is passed to the file, path to the file whose preview should be cleaned.
+Five arguments are passed to the file, (1) current file name, (2) width, (3) height, (4) horizontal position, and (5) vertical position of preview pane respectively.
 Preview clearing is disabled when the value of this option is left empty.
 
     dircache       bool      (default on)
@@ -591,6 +598,10 @@ Show directories first above regular files.
 
     dironly        bool      (default off)
 
+If enabled, directories will also be passed to the previewer script. This allows custom previews for directories.
+
+    dirpreviews    bool      (default off)
+
 Show only directories.
 
     drawbox        bool      (default off)
@@ -629,6 +640,10 @@ Patterns can be given as relative or absolute paths.
 Globbing supports the usual special characters, '*' to match any sequence, '?' to match any character, and '[...]' or '[^...] to match character sets or ranges.
 In addition, if a pattern starts with '!', then its matches are excluded from hidden files.
 
+    history        bool      (default on)
+
+Save command history.
+
     icons          bool      (default off)
 
 Show icons before each item in the list.
@@ -708,7 +723,7 @@ Preview filtering is disabled and files are displayed as they are when the value
     promptfmt      string    (default "\033[32;1m%u@%h\033[0m:\033[34;1m%d\033[0m\033[1m%f\033[0m")
 
 Format string of the prompt shown in the top line.
-Special expansions are provided, '%u' as the user name, '%h' as the host name, '%w' as the working directory, '%d' as the working directory with a trailing path separator, '%f' as the file name, and '%F' as the current filter.
+Special expansions are provided, '%u' as the user name, '%h' as the host name, '%w' as the working directory, '%d' as the working directory with a trailing path separator, '%f' as the file name, and '%F' as the current filter. '%S' may be used once and will provide a spacer so that the following parts are right aligned on the screen.
 Home folder is shown as '~' in the working directory expansion.
 Directory names are automatically shortened to a single character starting from the left most parent when the prompt does not fit to the screen.
 
@@ -862,7 +877,7 @@ This shell command can be defined to override the default 'paste' command.
 
     rename
 
-This shell command can be defined to override the default 'paste' command.
+This shell command can be defined to override the default 'rename' command.
 
     delete
 
@@ -920,9 +935,10 @@ Command 'map' is used to bind a key to a command which can be builtin command, c
     map i $less $f     # shell command
     map U !du -csh *   # waiting shell command
 
-Command 'cmap' is used to bind a key to a command line command which can only be one of the builtin commands:
+Command 'cmap' is used to bind a key on the command line to a command line command or any other command:
 
     cmap <c-g> cmd-escape
+    cmap <a-i> set incsearch!
 
 You can delete an existing binding by leaving the expression empty:
 
@@ -1046,7 +1062,7 @@ A first attempt to write such a command may look like this:
         if [ -z "$fs" ]; then
             mv "$f" ~/.trash
         else
-            IFS="`printf '\n\t'`"; mv $fs ~/.trash
+            IFS="$(printf '\n\t')"; mv $fs ~/.trash
         fi
     }}
 
@@ -1057,7 +1073,7 @@ We can use this variable to get rid of the conditional:
 
     cmd trash ${{
         mkdir -p ~/.trash
-        IFS="`printf '\n\t'`"; mv $fx ~/.trash
+        IFS="$(printf '\n\t')"; mv $fx ~/.trash
     }}
 
 The trash directory is checked each time the command is executed.
@@ -1065,13 +1081,13 @@ We can move it outside of the command so it would only run once at startup:
 
     ${{ mkdir -p ~/.trash }}
 
-    cmd trash ${{ IFS="`printf '\n\t'`"; mv $fx ~/.trash }}
+    cmd trash ${{ IFS="$(printf '\n\t')"; mv $fx ~/.trash }}
 
 Since these are one liners, we can drop '{{' and '}}':
 
     $mkdir -p ~/.trash
 
-    cmd trash $IFS="`printf '\n\t'`"; mv $fx ~/.trash
+    cmd trash $IFS="$(printf '\n\t')"; mv $fx ~/.trash
 
 Finally note that we set 'IFS' variable manually in these commands.
 Instead we could use the 'ifs' option to set it for all shell commands (i.e. 'set ifs "\n"').
@@ -1217,14 +1233,10 @@ You can enable 'globsearch' option to match with a glob pattern.
 Globbing supports '*' to match any sequence, '?' to match any character, and '[...]' or '[^...] to match character sets or ranges.
 You can enable 'incsearch' option to jump to the current match at each keystroke while typing.
 In this mode, you can either use 'cmd-enter' to accept the search or use 'cmd-escape' to cancel the search.
-Alternatively, you can also map some other commands with 'cmap' to accept the search and execute the command immediately afterwards.
-Possible candidates are 'up', 'down' and their variants, 'top', 'bottom', 'updir', and 'open' commands.
-For example, you can use arrow keys to finish the search with the following mappings:
+You can also map some other commands with 'cmap' to accept the search and execute the command immediately afterwards.
+For example, you can use the right arrow key to finish the search and open the selected file with the following mapping:
 
-    cmap <up>    up
-    cmap <down>  down
-    cmap <left>  updir
-    cmap <right> open
+    cmap <right> :cmd-enter; open
 
 Finding mechanism is implemented with commands 'find' (default 'f'), 'find-back' (default 'F'), 'find-next' (default ';'), 'find-prev' (default ',').
 You can disable 'anchorfind' option to match a pattern at an arbitrary position in the filename instead of the beginning.
@@ -1254,8 +1266,7 @@ It is possible to use different command types:
 You may want to use either file extensions or mime types from 'file' command:
 
     cmd open ${{
-        test -L $f && f=$(readlink -f $f)
-        case $(file --mime-type $f -b) in
+        case $(file --mime-type -Lb $f) in
             text/*) vi $fx;;
             *) for f in $fx; do xdg-open $f > /dev/null 2> /dev/null & done;;
         esac
@@ -1274,7 +1285,7 @@ Previewing Files
 
 lf previews files on the preview pane by printing the file until the end or the preview pane is filled.
 This output can be enhanced by providing a custom preview script for filtering.
-This can be used to highlight source codes, list contents of archive files or view pdf or image files to name few.
+This can be used to highlight source codes, list contents of archive files or view pdf or image files to name a few.
 For coloring lf recognizes ansi escape codes.
 
 In order to use this feature you need to set the value of 'previewer' option to the path of an executable file.
diff --git a/docstring.go b/docstring.go
index c5c538b..3efe281 100644
--- a/docstring.go
+++ b/docstring.go
@@ -89,6 +89,7 @@ The following command line commands are provided by lf:
     cmd-complete             (default '<tab>')
     cmd-menu-complete
     cmd-menu-complete-back
+    cmd-menu-accept
     cmd-enter                (default '<c-j>' and '<enter>')
     cmd-interrupt            (default '<c-c>')
     cmd-history-next         (default '<c-n>')
@@ -128,6 +129,7 @@ The following options can be used to customize the behavior of lf:
     globsearch     bool      (default off)
     hidden         bool      (default off)
     hiddenfiles    []string  (default '.*')
+    history        bool      (default on)
     icons          bool      (default off)
     ifs            string    (default '')
     ignorecase     bool      (default on)
@@ -519,6 +521,10 @@ to these commands (e.g. 'cmap <tab> cmd-menu-complete; cmap <backtab>
 cmd-menu-complete-back'). You can use the assigned keys assigned to display
 the menu and then cycle through completion options.
 
+    cmd-menu-accept
+
+Accept the currently selected match in menu completion and close the menu.
+
     cmd-enter                (default '<c-j>' and '<enter>')
 
 Execute the current line.
@@ -600,9 +606,10 @@ Automatically quit server when there are no clients left connected.
 
 Set the path of a cleaner file. The file should be executable. This file is
 called if previewing is enabled, the previewer is set, and the previously
-selected file had its preview cache disabled. One argument is passed to the
-file, path to the file whose preview should be cleaned. Preview clearing is
-disabled when the value of this option is left empty.
+selected file had its preview cache disabled. Five arguments are passed to
+the file, (1) current file name, (2) width, (3) height, (4) horizontal
+position, and (5) vertical position of preview pane respectively. Preview
+clearing is disabled when the value of this option is left empty.
 
     dircache       bool      (default on)
 
@@ -665,6 +672,10 @@ any sequence, '?' to match any character, and '[...]' or '[^...] to match
 character sets or ranges. In addition, if a pattern starts with '!', then
 its matches are excluded from hidden files.
 
+    history        bool      (default on)
+
+Save command history.
+
     icons          bool      (default off)
 
 Show icons before each item in the list.
@@ -754,10 +765,11 @@ value of this option is left empty.
 Format string of the prompt shown in the top line. Special expansions are
 provided, '%u' as the user name, '%h' as the host name, '%w' as the working
 directory, '%d' as the working directory with a trailing path separator,
-'%f' as the file name, and '%F' as the current filter. Home folder is shown
-as '~' in the working directory expansion. Directory names are automatically
-shortened to a single character starting from the left most parent when the
-prompt does not fit to the screen.
+'%f' as the file name, and '%F' as the current filter. '%S' may be used once
+and will provide a spacer so that the following parts are right aligned on
+the screen. Home folder is shown as '~' in the working directory expansion.
+Directory names are automatically shortened to a single character starting
+from the left most parent when the prompt does not fit to the screen.
 
     ratios         []int     (default '1:2:3')
 
@@ -928,7 +940,7 @@ This shell command can be defined to override the default 'paste' command.
 
     rename
 
-This shell command can be defined to override the default 'paste' command.
+This shell command can be defined to override the default 'rename' command.
 
     delete
 
@@ -993,10 +1005,11 @@ command, custom command, or shell command:
     map i $less $f     # shell command
     map U !du -csh *   # waiting shell command
 
-Command 'cmap' is used to bind a key to a command line command which can
-only be one of the builtin commands:
+Command 'cmap' is used to bind a key on the command line to a command line
+command or any other command:
 
     cmap <c-g> cmd-escape
+    cmap <a-i> set incsearch!
 
 You can delete an existing binding by leaving the expression empty:
 
@@ -1135,7 +1148,7 @@ this:
         if [ -z "$fs" ]; then
             mv "$f" ~/.trash
         else
-            IFS="'printf '\n\t''"; mv $fs ~/.trash
+            IFS="$(printf '\n\t')"; mv $fs ~/.trash
         fi
     }}
 
@@ -1146,7 +1159,7 @@ conditional:
 
     cmd trash ${{
         mkdir -p ~/.trash
-        IFS="'printf '\n\t''"; mv $fx ~/.trash
+        IFS="$(printf '\n\t')"; mv $fx ~/.trash
     }}
 
 The trash directory is checked each time the command is executed. We can
@@ -1154,13 +1167,13 @@ move it outside of the command so it would only run once at startup:
 
     ${{ mkdir -p ~/.trash }}
 
-    cmd trash ${{ IFS="'printf '\n\t''"; mv $fx ~/.trash }}
+    cmd trash ${{ IFS="$(printf '\n\t')"; mv $fx ~/.trash }}
 
 Since these are one liners, we can drop '{{' and '}}':
 
     $mkdir -p ~/.trash
 
-    cmd trash $IFS="'printf '\n\t''"; mv $fx ~/.trash
+    cmd trash $IFS="$(printf '\n\t')"; mv $fx ~/.trash
 
 Finally note that we set 'IFS' variable manually in these commands. Instead
 we could use the 'ifs' option to set it for all shell commands (i.e. 'set
@@ -1345,16 +1358,12 @@ pattern. Globbing supports '*' to match any sequence, '?' to match any
 character, and '[...]' or '[^...] to match character sets or ranges. You can
 enable 'incsearch' option to jump to the current match at each keystroke
 while typing. In this mode, you can either use 'cmd-enter' to accept the
-search or use 'cmd-escape' to cancel the search. Alternatively, you can also
-map some other commands with 'cmap' to accept the search and execute the
-command immediately afterwards. Possible candidates are 'up', 'down' and
-their variants, 'top', 'bottom', 'updir', and 'open' commands. For example,
-you can use arrow keys to finish the search with the following mappings:
+search or use 'cmd-escape' to cancel the search. You can also map some other
+commands with 'cmap' to accept the search and execute the command
+immediately afterwards. For example, you can use the right arrow key to
+finish the search and open the selected file with the following mapping:
 
-    cmap <up>    up
-    cmap <down>  down
-    cmap <left>  updir
-    cmap <right> open
+    cmap <right> :cmd-enter; open
 
 Finding mechanism is implemented with commands 'find' (default 'f'),
 'find-back' (default 'F'), 'find-next' (default ';'), 'find-prev' (default
@@ -1390,8 +1399,7 @@ You may want to use either file extensions or mime types from 'file'
 command:
 
     cmd open ${{
-        test -L $f && f=$(readlink -f $f)
-        case $(file --mime-type $f -b) in
+        case $(file --mime-type -Lb $f) in
             text/*) vi $fx;;
             *) for f in $fx; do xdg-open $f > /dev/null 2> /dev/null & done;;
         esac
@@ -1414,7 +1422,7 @@ Previewing Files
 lf previews files on the preview pane by printing the file until the end or
 the preview pane is filled. This output can be enhanced by providing a
 custom preview script for filtering. This can be used to highlight source
-codes, list contents of archive files or view pdf or image files to name
+codes, list contents of archive files or view pdf or image files to name a
 few. For coloring lf recognizes ansi escape codes.
 
 In order to use this feature you need to set the value of 'previewer' option
diff --git a/etc/lfrc.example b/etc/lfrc.example
index 510f14d..1f96c22 100644
--- a/etc/lfrc.example
+++ b/etc/lfrc.example
@@ -36,8 +36,7 @@ map O $mimeopen --ask $f
 # use either file extensions and/or mime types here. Below uses an editor for
 # text files and a file opener for the rest.
 cmd open ${{
-    test -L $f && f=$(readlink -f $f)
-    case $(file --mime-type $f -b) in
+    case $(file --mime-type -Lb $f) in
         text/*) $EDITOR $fx;;
         *) for f in $fx; do setsid $OPENER $f > /dev/null 2> /dev/null & done;;
     esac
diff --git a/eval.go b/eval.go
index 53191b4..29d6025 100644
--- a/eval.go
+++ b/eval.go
@@ -44,6 +44,8 @@ func (e *setExpr) eval(app *app, args []string) {
 		app.nav.position()
 		app.ui.sort()
 		app.ui.loadFile(app.nav, true)
+	case "dirpreviews":
+		gOpts.dirpreviews = true
 	case "nodironly":
 		gOpts.dironly = false
 		app.nav.sort()
@@ -125,6 +127,12 @@ func (e *setExpr) eval(app *app, args []string) {
 		app.nav.position()
 		app.ui.sort()
 		app.ui.loadFile(app.nav, true)
+	case "history":
+		gOpts.history = true
+	case "nohistory":
+		gOpts.history = false
+	case "history!":
+		gOpts.history = !gOpts.history
 	case "icons":
 		gOpts.icons = true
 	case "noicons":
@@ -505,6 +513,9 @@ func update(app *app) {
 	switch {
 	case gOpts.incsearch && app.ui.cmdPrefix == "/":
 		app.nav.search = string(app.ui.cmdAccLeft) + string(app.ui.cmdAccRight)
+		if app.nav.search == "" {
+			return
+		}
 
 		dir := app.nav.currDir()
 		old := dir.ind
@@ -519,6 +530,9 @@ func update(app *app) {
 		}
 	case gOpts.incsearch && app.ui.cmdPrefix == "?":
 		app.nav.search = string(app.ui.cmdAccLeft) + string(app.ui.cmdAccRight)
+		if app.nav.search == "" {
+			return
+		}
 
 		dir := app.nav.currDir()
 		old := dir.ind
@@ -588,6 +602,8 @@ func normal(app *app) {
 	app.ui.cmdAccRight = nil
 	app.ui.cmdTmp = nil
 	app.ui.cmdPrefix = ""
+
+	app.cmdHistoryInd = 0
 }
 
 func insert(app *app, arg string) {
@@ -1581,7 +1597,7 @@ func (e *callExpr) eval(app *app, args []string) {
 			return
 		}
 
-		// Reset the completition menu as in bash/vim
+		// Reset the completion menu as in bash/vim
 		// and update the pertinent variables
 		if app.ui.menuBuf != nil {
 			app.ui.menuBuf = nil
@@ -1622,27 +1638,21 @@ func (e *callExpr) eval(app *app, args []string) {
 			app.ui.menuBuf = b
 		}
 	case "cmd-menu-complete":
-		var target []rune
-
-		// target will store the current menu query
 		// note that, as we will store the current selected value
 		// in cmdAccLeft, we can not call the complete function with its
-		// value, as it is already a final completition result
+		// value, as it is already a final completion result
 		if app.ui.menuBuf == nil {
-			target = app.ui.cmdAccLeft
 			app.ui.cmdTmp = app.ui.cmdAccLeft
-		} else {
-			target = app.ui.cmdTmp
 		}
 
 		var matches []string
 		switch app.ui.cmdPrefix {
 		case ":":
-			matches, app.ui.cmdAccLeft = completeCmd(target)
+			matches, app.ui.cmdAccLeft = completeCmd(app.ui.cmdTmp)
 		case "/", "?":
-			matches, app.ui.cmdAccLeft = completeFile(target)
+			matches, app.ui.cmdAccLeft = completeFile(app.ui.cmdTmp)
 		case "$", "%", "!", "&":
-			matches, app.ui.cmdAccLeft = completeShell(target)
+			matches, app.ui.cmdAccLeft = completeShell(app.ui.cmdTmp)
 		default:
 			return
 		}
@@ -1650,13 +1660,12 @@ func (e *callExpr) eval(app *app, args []string) {
 		app.ui.draw(app.nav)
 
 		if len(matches) > 1 {
-			step := 1
-
-			// Check if the tab-selecttion was inited
+			// Check if the tab-selection was inited
 			if app.ui.menuSelected == -2 {
 				app.ui.menuSelected = -1
 			} else {
-				app.ui.menuSelected = mod(app.ui.menuSelected+step, len(matches))
+				app.ui.menuSelected++
+				app.ui.menuSelected %= len(matches)
 			}
 
 			if err := listMatchesMenu(app.ui, matches); err != nil {
@@ -1667,23 +1676,18 @@ func (e *callExpr) eval(app *app, args []string) {
 			app.ui.menuSelected = -2
 		}
 	case "cmd-menu-complete-back":
-		var target []rune
-
 		if app.ui.menuBuf == nil {
-			target = app.ui.cmdAccLeft
 			app.ui.cmdTmp = app.ui.cmdAccLeft
-		} else {
-			target = app.ui.cmdTmp
 		}
 
 		var matches []string
 		switch app.ui.cmdPrefix {
 		case ":":
-			matches, app.ui.cmdAccLeft = completeCmd(target)
+			matches, app.ui.cmdAccLeft = completeCmd(app.ui.cmdTmp)
 		case "/", "?":
-			matches, app.ui.cmdAccLeft = completeFile(target)
+			matches, app.ui.cmdAccLeft = completeFile(app.ui.cmdTmp)
 		case "$", "%", "!", "&":
-			matches, app.ui.cmdAccLeft = completeShell(target)
+			matches, app.ui.cmdAccLeft = completeShell(app.ui.cmdTmp)
 		default:
 			return
 		}
@@ -1691,13 +1695,13 @@ func (e *callExpr) eval(app *app, args []string) {
 		app.ui.draw(app.nav)
 
 		if len(matches) > 1 {
-			step := -1
-
-			// Check if the tab-selecttion was inited
+			// Check if the tab-selection was inited
 			if app.ui.menuSelected == -2 {
 				app.ui.menuSelected = -1
+			} else if app.ui.menuSelected <= 0 {
+				app.ui.menuSelected = len(matches) - 1
 			} else {
-				app.ui.menuSelected = mod(app.ui.menuSelected+step, len(matches))
+				app.ui.menuSelected--
 			}
 
 			if err := listMatchesMenu(app.ui, matches); err != nil {
@@ -1707,6 +1711,9 @@ func (e *callExpr) eval(app *app, args []string) {
 			app.ui.menuBuf = nil
 			app.ui.menuSelected = -2
 		}
+	case "cmd-menu-accept":
+		app.ui.menuBuf = nil
+		app.ui.menuSelected = -2
 	case "cmd-enter":
 		s := string(append(app.ui.cmdAccLeft, app.ui.cmdAccRight...))
 		if len(s) == 0 && app.ui.cmdPrefix != "filter: " {
@@ -1881,31 +1888,27 @@ func (e *callExpr) eval(app *app, args []string) {
 			app.cmdHistoryInd--
 		}
 		if app.cmdHistoryInd == 0 {
-			app.ui.menuBuf = nil
-			app.ui.menuSelected = -2
-			app.ui.cmdAccLeft = nil
-			app.ui.cmdAccRight = nil
-			app.ui.cmdTmp = nil
+			normal(app)
 			app.ui.cmdPrefix = ":"
 			return
 		}
-		cmd := app.cmdHistory[len(app.cmdHistory)-app.cmdHistoryInd]
+		historyInd := app.cmdHistoryInd
+		cmd := app.cmdHistory[len(app.cmdHistory)-historyInd]
 		normal(app)
+		app.cmdHistoryInd = historyInd
 		app.ui.cmdPrefix = cmd.prefix
 		app.ui.cmdAccLeft = []rune(cmd.value)
 	case "cmd-history-prev":
 		if app.ui.cmdPrefix == ">" {
 			return
 		}
-		if app.ui.cmdPrefix == "" {
-			app.cmdHistoryInd = 0
-		}
 		if app.cmdHistoryInd == len(app.cmdHistory) {
 			return
 		}
-		app.cmdHistoryInd++
-		cmd := app.cmdHistory[len(app.cmdHistory)-app.cmdHistoryInd]
+		historyInd := app.cmdHistoryInd + 1
+		cmd := app.cmdHistory[len(app.cmdHistory)-historyInd]
 		normal(app)
+		app.cmdHistoryInd = historyInd
 		app.ui.cmdPrefix = cmd.prefix
 		app.ui.cmdAccLeft = []rune(cmd.value)
 	case "cmd-delete":
diff --git a/icons.go b/icons.go
index 3b56293..347645f 100644
--- a/icons.go
+++ b/icons.go
@@ -156,7 +156,7 @@ func (im iconMap) get(f *file) string {
 		return val
 	}
 
-	if val, ok := im["*"+f.ext]; ok {
+	if val, ok := im["*"+strings.ToLower(f.ext)]; ok {
 		return val
 	}
 
diff --git a/lf.1 b/lf.1
index f0a7311..1ac3c42 100644
--- a/lf.1
+++ b/lf.1
@@ -102,6 +102,7 @@ The following command line commands are provided by lf:
     cmd-complete             (default '<tab>')
     cmd-menu-complete
     cmd-menu-complete-back
+    cmd-menu-accept
     cmd-enter                (default '<c-j>' and '<enter>')
     cmd-interrupt            (default '<c-c>')
     cmd-history-next         (default '<c-n>')
@@ -143,6 +144,7 @@ The following options can be used to customize the behavior of lf:
     globsearch     bool      (default off)
     hidden         bool      (default off)
     hiddenfiles    []string  (default '.*')
+    history        bool      (default on)
     icons          bool      (default off)
     ifs            string    (default '')
     ignorecase     bool      (default on)
@@ -599,6 +601,12 @@ Autocomplete the current word.
 .PP
 Autocomplete the current word with menu selection. You need to assign keys to these commands (e.g. 'cmap <tab> cmd-menu-complete; cmap <backtab> cmd-menu-complete-back'). You can use the assigned keys assigned to display the menu and then cycle through completion options.
 .PP
+.EX
+    cmd-menu-accept
+.EE
+.PP
+Accept the currently selected match in menu completion and close the menu.
+.PP
 .EX
     cmd-enter                (default '<c-j>' and '<enter>')
 .EE
@@ -704,7 +712,7 @@ Automatically quit server when there are no clients left connected.
     cleaner        string    (default '') (not called if empty)
 .EE
 .PP
-Set the path of a cleaner file. The file should be executable. This file is called if previewing is enabled, the previewer is set, and the previously selected file had its preview cache disabled. One argument is passed to the file, path to the file whose preview should be cleaned. Preview clearing is disabled when the value of this option is left empty.
+Set the path of a cleaner file. The file should be executable. This file is called if previewing is enabled, the previewer is set, and the previously selected file had its preview cache disabled. Five arguments are passed to the file, (1) current file name, (2) width, (3) height, (4) horizontal position, and (5) vertical position of preview pane respectively. Preview clearing is disabled when the value of this option is left empty.
 .PP
 .EX
     dircache       bool      (default on)
@@ -772,6 +780,12 @@ Show hidden files. On Unix systems, hidden files are determined by the value of
 .PP
 List of hidden file glob patterns. Patterns can be given as relative or absolute paths. Globbing supports the usual special characters, '*' to match any sequence, '?' to match any character, and '[...]' or '[^...] to match character sets or ranges. In addition, if a pattern starts with '!', then its matches are excluded from hidden files.
 .PP
+.EX
+    history        bool      (default on)
+.EE
+.PP
+Save command history.
+.PP
 .EX
     icons          bool      (default off)
 .EE
@@ -860,7 +874,7 @@ Set the path of a previewer file to filter the content of regular files for prev
     promptfmt      string    (default "\e033[32;1m%u@%h\e033[0m:\e033[34;1m%d\e033[0m\e033[1m%f\e033[0m")
 .EE
 .PP
-Format string of the prompt shown in the top line. Special expansions are provided, '%u' as the user name, '%h' as the host name, '%w' as the working directory, '%d' as the working directory with a trailing path separator, '%f' as the file name, and '%F' as the current filter. Home folder is shown as '~' in the working directory expansion. Directory names are automatically shortened to a single character starting from the left most parent when the prompt does not fit to the screen.
+Format string of the prompt shown in the top line. Special expansions are provided, '%u' as the user name, '%h' as the host name, '%w' as the working directory, '%d' as the working directory with a trailing path separator, '%f' as the file name, and '%F' as the current filter. '%S' may be used once and will provide a spacer so that the following parts are right aligned on the screen. Home folder is shown as '~' in the working directory expansion. Directory names are automatically shortened to a single character starting from the left most parent when the prompt does not fit to the screen.
 .PP
 .EX
     ratios         []int     (default '1:2:3')
@@ -1060,7 +1074,7 @@ This shell command can be defined to override the default 'paste' command.
     rename
 .EE
 .PP
-This shell command can be defined to override the default 'paste' command.
+This shell command can be defined to override the default 'rename' command.
 .PP
 .EX
     delete
@@ -1127,10 +1141,11 @@ Command 'map' is used to bind a key to a command which can be builtin command, c
     map U !du -csh *   # waiting shell command
 .EE
 .PP
-Command 'cmap' is used to bind a key to a command line command which can only be one of the builtin commands:
+Command 'cmap' is used to bind a key on the command line to a command line command or any other command:
 .PP
 .EX
     cmap <c-g> cmd-escape
+    cmap <a-i> set incsearch!
 .EE
 .PP
 You can delete an existing binding by leaving the expression empty:
@@ -1276,7 +1291,7 @@ Regular shell commands are the most basic command type that is useful for many p
         if [ -z "$fs" ]; then
             mv "$f" ~/.trash
         else
-            IFS="`printf '\en\et'`"; mv $fs ~/.trash
+            IFS="$(printf '\en\et')"; mv $fs ~/.trash
         fi
     }}
 .EE
@@ -1286,7 +1301,7 @@ We check '$fs' to see if there are any selected files. Otherwise we just delete
 .EX
     cmd trash ${{
         mkdir -p ~/.trash
-        IFS="`printf '\en\et'`"; mv $fx ~/.trash
+        IFS="$(printf '\en\et')"; mv $fx ~/.trash
     }}
 .EE
 .PP
@@ -1297,7 +1312,7 @@ The trash directory is checked each time the command is executed. We can move it
 .EE
 .PP
 .EX
-    cmd trash ${{ IFS="`printf '\en\et'`"; mv $fx ~/.trash }}
+    cmd trash ${{ IFS="$(printf '\en\et')"; mv $fx ~/.trash }}
 .EE
 .PP
 Since these are one liners, we can drop '{{' and '}}':
@@ -1307,7 +1322,7 @@ Since these are one liners, we can drop '{{' and '}}':
 .EE
 .PP
 .EX
-    cmd trash $IFS="`printf '\en\et'`"; mv $fx ~/.trash
+    cmd trash $IFS="$(printf '\en\et')"; mv $fx ~/.trash
 .EE
 .PP
 Finally note that we set 'IFS' variable manually in these commands. Instead we could use the 'ifs' option to set it for all shell commands (i.e. 'set ifs "\en"'). This can be especially useful for interactive use (e.g. '$rm $f' or '$rm $fs' would simply work). This option is not set by default as it can behave unexpectedly for new users. However, use of this option is highly recommended and it is assumed in the rest of the documentation.
@@ -1411,13 +1426,10 @@ By default, lf does not assign 'delete' command to a key to protect new users. Y
 .SH SEARCHING FILES
 There are two mechanisms implemented in lf to search a file in the current directory. Searching is the traditional method to move the selection to a file matching a given pattern. Finding is an alternative way to search for a pattern possibly using fewer keystrokes.
 .PP
-Searching mechanism is implemented with commands 'search' (default '/'), 'search-back' (default '?'), 'search-next' (default 'n'), and 'search-prev' (default 'N'). You can enable 'globsearch' option to match with a glob pattern. Globbing supports '*' to match any sequence, '?' to match any character, and '[...]' or '[^...] to match character sets or ranges. You can enable 'incsearch' option to jump to the current match at each keystroke while typing. In this mode, you can either use 'cmd-enter' to accept the search or use 'cmd-escape' to cancel the search. Alternatively, you can also map some other commands with 'cmap' to accept the search and execute the command immediately afterwards. Possible candidates are 'up', 'down' and their variants, 'top', 'bottom', 'updir', and 'open' commands. For example, you can use arrow keys to finish the search with the following mappings:
+Searching mechanism is implemented with commands 'search' (default '/'), 'search-back' (default '?'), 'search-next' (default 'n'), and 'search-prev' (default 'N'). You can enable 'globsearch' option to match with a glob pattern. Globbing supports '*' to match any sequence, '?' to match any character, and '[...]' or '[^...] to match character sets or ranges. You can enable 'incsearch' option to jump to the current match at each keystroke while typing. In this mode, you can either use 'cmd-enter' to accept the search or use 'cmd-escape' to cancel the search. You can also map some other commands with 'cmap' to accept the search and execute the command immediately afterwards. For example, you can use the right arrow key to finish the search and open the selected file with the following mapping:
 .PP
 .EX
-    cmap <up>    up
-    cmap <down>  down
-    cmap <left>  updir
-    cmap <right> open
+    cmap <right> :cmd-enter; open
 .EE
 .PP
 Finding mechanism is implemented with commands 'find' (default 'f'), 'find-back' (default 'F'), 'find-next' (default ';'), 'find-prev' (default ','). You can disable 'anchorfind' option to match a pattern at an arbitrary position in the filename instead of the beginning. You can set the number of keys to match using 'findlen' option. If you set this value to zero, then the the keys are read until there is only a single match. Default values of these two options are set to jump to the first file with the given initial.
@@ -1440,8 +1452,7 @@ You may want to use either file extensions or mime types from 'file' command:
 .PP
 .EX
     cmd open ${{
-        test -L $f && f=$(readlink -f $f)
-        case $(file --mime-type $f -b) in
+        case $(file --mime-type -Lb $f) in
             text/*) vi $fx;;
             *) for f in $fx; do xdg-open $f > /dev/null 2> /dev/null & done;;
         esac
@@ -1458,7 +1469,7 @@ Following command is provided by default:
 .PP
 You may also use any other existing file openers as you like. Possible options are 'libfile-mimeinfo-perl' (executable name is 'mimeopen'), 'rifle' (ranger's default file opener), or 'mimeo' to name a few.
 .SH PREVIEWING FILES
-lf previews files on the preview pane by printing the file until the end or the preview pane is filled. This output can be enhanced by providing a custom preview script for filtering. This can be used to highlight source codes, list contents of archive files or view pdf or image files to name few. For coloring lf recognizes ansi escape codes.
+lf previews files on the preview pane by printing the file until the end or the preview pane is filled. This output can be enhanced by providing a custom preview script for filtering. This can be used to highlight source codes, list contents of archive files or view pdf or image files to name a few. For coloring lf recognizes ansi escape codes.
 .PP
 In order to use this feature you need to set the value of 'previewer' option to the path of an executable file. Five arguments are passed to the file, (1) current file name, (2) width, (3) height, (4) horizontal position, and (5) vertical position of preview pane respectively. Output of the execution is printed in the preview pane. You may also want to use the same script in your pager mapping as well:
 .PP
diff --git a/misc.go b/misc.go
index 7083cd7..451b760 100644
--- a/misc.go
+++ b/misc.go
@@ -91,7 +91,7 @@ func unescape(s string) string {
 }
 
 // This function splits the given string by whitespaces. It is aware of escaped
-// whitespaces so that they are not splitted unintentionally.
+// whitespaces so that they are not split unintentionally.
 func tokenize(s string) []string {
 	esc := false
 	var buf []rune
@@ -295,10 +295,6 @@ func max(a, b int) int {
 	return b
 }
 
-func mod(a, b int) int {
-	return (a%b + b) % b
-}
-
 // We don't need no generic code
 // We don't need no type control
 // No dark templates in compiler
diff --git a/nav.go b/nav.go
index 37fa540..28ffb3d 100644
--- a/nav.go
+++ b/nav.go
@@ -150,6 +150,7 @@ type dir struct {
 	ignorecase  bool      // ignorecase value from last sort
 	ignoredia   bool      // ignoredia value from last sort
 	noPerm      bool      // whether lf has no permission to open the directory
+	lines       []string  // lines of text to display if directory previews are enabled
 }
 
 func newDir(path string) *dir {
@@ -161,6 +162,7 @@ func newDir(path string) *dir {
 	}
 
 	return &dir{
+		loading:  gOpts.dirpreviews, // Directory is loaded after previewer function exits.
 		loadTime: time,
 		path:     path,
 		files:    files,
@@ -365,6 +367,7 @@ type nav struct {
 	deleteCountChan chan int
 	deleteTotalChan chan int
 	previewChan     chan string
+	dirPreviewChan  chan *dir
 	dirChan         chan *dir
 	regChan         chan *reg
 	dirCache        map[string]*dir
@@ -403,7 +406,11 @@ func (nav *nav) loadDirInternal(path string) *dir {
 		d := newDir(path)
 		d.sort()
 		d.ind, d.pos = 0, 0
+		if gOpts.dirpreviews {
+			nav.dirPreviewChan <- d
+		}
 		nav.dirChan <- d
+
 	}()
 	return d
 }
@@ -447,6 +454,9 @@ func (nav *nav) checkDir(dir *dir) {
 			nd := newDir(dir.path)
 			nd.filter = dir.filter
 			nd.sort()
+			if gOpts.dirpreviews {
+				nav.dirPreviewChan <- nd
+			}
 			nav.dirChan <- nd
 		}()
 	case dir.sortType != gOpts.sortType ||
@@ -490,6 +500,7 @@ func newNav(height int) *nav {
 		deleteCountChan: make(chan int, 1024),
 		deleteTotalChan: make(chan int, 1024),
 		previewChan:     make(chan string, 1024),
+		dirPreviewChan:  make(chan *dir, 1024),
 		dirChan:         make(chan *dir),
 		regChan:         make(chan *reg),
 		dirCache:        make(map[string]*dir),
@@ -599,6 +610,27 @@ func (nav *nav) exportFiles() {
 	exportFiles(currFile, currSelections, nav.currDir().path)
 }
 
+func (nav *nav) dirPreviewLoop(ui *ui) {
+	var prevPath string
+	for {
+		select {
+		case dir := <-nav.dirPreviewChan:
+
+			if dir == nil && len(gOpts.previewer) != 0 && len(gOpts.cleaner) != 0 && nav.volatilePreview {
+				cmd := exec.Command(gOpts.cleaner, prevPath)
+				if err := cmd.Run(); err != nil {
+					log.Printf("cleaning preview: %s", err)
+				}
+				nav.volatilePreview = false
+			} else if dir != nil {
+				win := ui.wins[len(ui.wins)-1]
+				nav.previewDir(dir, win)
+				prevPath = dir.path
+			}
+		}
+	}
+}
+
 func (nav *nav) previewLoop(ui *ui) {
 	var prev string
 	for path := range nav.previewChan {
@@ -612,17 +644,21 @@ func (nav *nav) previewLoop(ui *ui) {
 				break loop
 			}
 		}
+		win := ui.wins[len(ui.wins)-1]
 		if clear && len(gOpts.previewer) != 0 && len(gOpts.cleaner) != 0 && nav.volatilePreview {
 			nav.exportFiles()
 			exportOpts()
-			cmd := exec.Command(gOpts.cleaner, prev)
+			cmd := exec.Command(gOpts.cleaner, prev,
+				strconv.Itoa(win.w),
+				strconv.Itoa(win.h),
+				strconv.Itoa(win.x),
+				strconv.Itoa(win.y))
 			if err := cmd.Run(); err != nil {
 				log.Printf("cleaning preview: %s", err)
 			}
 			nav.volatilePreview = false
 		}
 		if len(path) != 0 {
-			win := ui.wins[len(ui.wins)-1]
 			nav.preview(path, win)
 			prev = path
 		}
@@ -644,7 +680,70 @@ func matchPattern(pattern, name, path string) bool {
 	return matched
 }
 
+func (nav *nav) previewDir(dir *dir, win *win) {
+
+	defer func() {
+		dir.loading = false
+		nav.dirChan <- dir
+	}()
+
+	var reader io.Reader
+
+	if len(gOpts.previewer) != 0 {
+		nav.exportFiles()
+		exportOpts()
+		cmd := exec.Command(gOpts.previewer, dir.path,
+			strconv.Itoa(win.w),
+			strconv.Itoa(win.h),
+			strconv.Itoa(win.x),
+			strconv.Itoa(win.y))
+
+		out, err := cmd.StdoutPipe()
+		if err != nil {
+			log.Printf("previewing dir: %s", err)
+			return
+		}
+
+		if err := cmd.Start(); err != nil {
+			log.Printf("previewing dir: %s", err)
+			out.Close()
+			return
+		}
+
+		defer func() {
+			if err := cmd.Wait(); err != nil {
+				if e, ok := err.(*exec.ExitError); ok {
+					if e.ExitCode() != 0 {
+						nav.volatilePreview = true
+					}
+				} else {
+					log.Printf("loading dir: %s", err)
+				}
+			}
+		}()
+		defer out.Close()
+		reader = out
+		buf := bufio.NewScanner(reader)
+
+		for i := 0; i < win.h && buf.Scan(); i++ {
+			for _, r := range buf.Text() {
+				if r == 0 {
+					dir.lines = []string{"\033[7mbinary\033[0m"}
+					return
+				}
+			}
+			dir.lines = append(dir.lines, buf.Text())
+		}
+
+		if buf.Err() != nil {
+			log.Printf("loading dir: %s", buf.Err())
+		}
+	}
+
+}
+
 func (nav *nav) preview(path string, win *win) {
+
 	reg := &reg{loadTime: time.Now(), path: path}
 	defer func() { nav.regChan <- reg }()
 
@@ -1667,9 +1766,12 @@ func (nav *nav) readTags() error {
 
 	scanner := bufio.NewScanner(f)
 	for scanner.Scan() {
-		toks := strings.SplitN(scanner.Text(), ":", 2)
-		if _, ok := nav.tags[toks[0]]; !ok {
-			nav.tags[toks[0]] = toks[1]
+		text := scanner.Text()
+		ind := strings.LastIndex(text, ":")
+		path := text[0:ind]
+		mark := text[ind+1:]
+		if _, ok := nav.tags[path]; !ok {
+			nav.tags[path] = mark
 		}
 	}
 
diff --git a/opts.go b/opts.go
index 2909809..20f9708 100644
--- a/opts.go
+++ b/opts.go
@@ -33,6 +33,7 @@ var gOpts struct {
 	dircache       bool
 	dircounts      bool
 	dironly        bool
+	dirpreviews    bool
 	drawbox        bool
 	globsearch     bool
 	icons          bool
@@ -67,6 +68,7 @@ var gOpts struct {
 	truncatechar   string
 	ratios         []int
 	hiddenfiles    []string
+	history        bool
 	info           []string
 	shellopts      []string
 	keys           map[string]expr
@@ -83,6 +85,7 @@ func init() {
 	gOpts.dircache = true
 	gOpts.dircounts = false
 	gOpts.dironly = false
+	gOpts.dirpreviews = false
 	gOpts.drawbox = false
 	gOpts.globsearch = false
 	gOpts.icons = false
@@ -117,6 +120,7 @@ func init() {
 	gOpts.truncatechar = "~"
 	gOpts.ratios = []int{1, 2, 3}
 	gOpts.hiddenfiles = []string{".*"}
+	gOpts.history = true
 	gOpts.info = nil
 	gOpts.shellopts = nil
 	gOpts.sortType = sortType{naturalSort, dirfirstSort}
diff --git a/ui.go b/ui.go
index 951c91b..53586b3 100644
--- a/ui.go
+++ b/ui.go
@@ -324,7 +324,8 @@ func fileInfo(f *file, d *dir) string {
 	return info
 }
 
-func (win *win) printDir(screen tcell.Screen, dir *dir, selections map[string]int, saves map[string]bool, tags map[string]string, colors styleMap, icons iconMap) {
+func (win *win) printDir(screen tcell.Screen, dir *dir, selections map[string]int, saves map[string]bool, tags map[string]string, colors styleMap, icons iconMap, previewAllowed bool) {
+
 	if win.w < 5 || dir == nil {
 		return
 	}
@@ -334,11 +335,25 @@ func (win *win) printDir(screen tcell.Screen, dir *dir, selections map[string]in
 		return
 	}
 
-	if dir.loading && len(dir.files) == 0 {
+	if (dir.loading && len(dir.files) == 0) || (previewAllowed && dir.loading && gOpts.dirpreviews) {
 		win.print(screen, 2, 0, tcell.StyleDefault.Reverse(true), "loading...")
 		return
 	}
 
+	if previewAllowed && gOpts.dirpreviews && len(gOpts.previewer) > 0 {
+
+		// Print previewer result instead of default directory print operation.
+		st := tcell.StyleDefault
+		for i, l := range dir.lines {
+			if i > win.h-1 {
+				break
+			}
+
+			st = win.print(screen, 2, i, st, l)
+		}
+		return
+	}
+
 	if len(dir.files) == 0 {
 		win.print(screen, 2, 0, tcell.StyleDefault.Reverse(true), "empty")
 		return
@@ -733,6 +748,13 @@ func (ui *ui) drawPromptLine(nav *nav) {
 		prompt = strings.Replace(prompt, "%F", "", -1)
 	}
 
+	// spacer
+	avail := ui.promptWin.w - printLength(prompt) + 2
+	if avail > 0 {
+		prompt = strings.Replace(prompt, "%S", strings.Repeat(" ", avail), 1)
+	}
+	prompt = strings.Replace(prompt, "%S", "", -1)
+
 	ui.promptWin.print(ui.screen, 0, 0, st, prompt)
 }
 
@@ -848,7 +870,7 @@ func (ui *ui) draw(nav *nav) {
 
 	doff := len(nav.dirs) - length
 	for i := 0; i < length; i++ {
-		ui.wins[woff+i].printDir(ui.screen, nav.dirs[doff+i], nav.selections, nav.saves, nav.tags, ui.styles, ui.icons)
+		ui.wins[woff+i].printDir(ui.screen, nav.dirs[doff+i], nav.selections, nav.saves, nav.tags, ui.styles, ui.icons, false)
 	}
 
 	switch ui.cmdPrefix {
@@ -882,7 +904,7 @@ func (ui *ui) draw(nav *nav) {
 			preview := ui.wins[len(ui.wins)-1]
 
 			if curr.IsDir() {
-				preview.printDir(ui.screen, ui.dirPrev, nav.selections, nav.saves, nav.tags, ui.styles, ui.icons)
+				preview.printDir(ui.screen, ui.dirPrev, nav.selections, nav.saves, nav.tags, ui.styles, ui.icons, true)
 			} else if curr.Mode().IsRegular() {
 				preview.printReg(ui.screen, ui.regPrev)
 			}
@@ -1258,13 +1280,14 @@ func listMatchesMenu(ui *ui, matches []string) error {
 
 			// Handle menu tab match only if wanted
 			if ui.menuSelected == i {
+				comp := []rune(escape(target))
 				toks := tokenize(string(ui.cmdAccLeft))
-				last := toks[len(toks)-1]
+				_, last := filepath.Split(toks[len(toks)-1])
 
-				if strings.Contains(target, last) {
-					ui.cmdAccLeft = append(ui.cmdAccLeft[:len(ui.cmdAccLeft)-len(last)], []rune(target)...)
+				if last == "" {
+					ui.cmdAccLeft = append(ui.cmdAccLeft, comp...)
 				} else {
-					ui.cmdAccLeft = append(ui.cmdAccLeft, []rune(target)...)
+					ui.cmdAccLeft = append(ui.cmdAccLeft[:len(ui.cmdAccLeft)-len([]rune(last))], comp...)
 				}
 
 				target = fmt.Sprintf("\033[7m%s\033[0m%*s", target, wcol-len(target), "")


Test patch:
diff --git a/complete_test.go b/complete_test.go
index b5044c2..36994dd 100644
--- a/complete_test.go
+++ b/complete_test.go
@@ -18,10 +18,11 @@ func TestMatchLongest(t *testing.T) {
 		{"foo", "foobar", "foo"},
 		{"foo", "barfoo", ""},
 		{"foobar", "foobaz", "fooba"},
+		{"год", "гол", "го"},
 	}
 
 	for _, test := range tests {
-		if got := matchLongest(test.s1, test.s2); got != test.exp {
+		if got := string(matchLongest([]rune(test.s1), []rune(test.s2))); got != test.exp {
 			t.Errorf("at input '%s' and '%s' expected '%s' but got '%s'", test.s1, test.s2, test.exp, got)
 		}
 	}
@@ -48,8 +49,8 @@ func TestMatchWord(t *testing.T) {
 			t.Errorf("at input '%s' with '%s' expected '%s' but got '%s'", test.s, test.words, test.matches, m)
 		}
 
-		if l != test.longest {
-			t.Errorf("at input '%s' with '%s' expected '%s' but got '%s'", test.s, test.words, test.longest, l)
+		if ls := string(l); ls != test.longest {
+			t.Errorf("at input '%s' with '%s' expected '%s' but got '%s'", test.s, test.words, test.longest, ls)
 		}
 	}
 }