]> code.delx.au - gnu-emacs-elpa/blobdiff - packages/swiper/ivy.el
Merge commit 'e2452a3e77ef6ea6b193292d2c0bbbe93dd4b078' from swiper
[gnu-emacs-elpa] / packages / swiper / ivy.el
index 38a8ff4724bd3bc5dca60a0cce3c72e2963c2193..6fca361318c25311bca2a7838882f8e7735bd339 100644 (file)
@@ -4,7 +4,7 @@
 
 ;; Author: Oleh Krehel <ohwoeowho@gmail.com>
 ;; URL: https://github.com/abo-abo/swiper
-;; Version: 0.2.1
+;; Version: 0.2.3
 ;; Package-Requires: ((emacs "24.1"))
 ;; Keywords: matching
 
 ;; re-building it into a regex.
 ;; So "for example" is transformed into "\\(for\\).*\\(example\\)".
 
+(require 'cl-lib)
+
 ;;; Code:
+(require 'cl-lib)
+
 ;;* Customization
 (defgroup ivy nil
   "Incremental vertical completion."
   '((t (:inherit highlight)))
   "Face used by Ivy for highlighting first match.")
 
+(defface ivy-subdir
+  '((t (:weight bold)))
+  "Face used by Ivy for highlighting subdirs in the alternatives.")
+
 (defcustom ivy-height 10
   "Number of lines for the minibuffer window."
   :type 'integer)
@@ -64,23 +72,38 @@ Set this to nil if you don't want the count."
 This is usually meant as a quick exit out of the minibuffer."
   :type 'function)
 
+(defcustom ivy-extra-directories '("../" "./")
+  "Add this to the front of the list when completing file names.
+Only \"./\" and \"../\" apply here. They appear in reverse order."
+  :type 'list)
+
 ;;* User Visible
 ;;** Keymap
 (require 'delsel)
 (defvar ivy-minibuffer-map
   (let ((map (make-sparse-keymap)))
     (define-key map (kbd "C-m") 'ivy-done)
+    (define-key map (kbd "C-j") 'ivy-alt-done)
     (define-key map (kbd "C-n") 'ivy-next-line)
     (define-key map (kbd "C-p") 'ivy-previous-line)
+    (define-key map (kbd "<down>") 'ivy-next-line)
+    (define-key map (kbd "<up>") 'ivy-previous-line)
     (define-key map (kbd "C-s") 'ivy-next-line-or-history)
     (define-key map (kbd "C-r") 'ivy-previous-line-or-history)
     (define-key map (kbd "SPC") 'self-insert-command)
     (define-key map (kbd "DEL") 'ivy-backward-delete-char)
     (define-key map (kbd "M-<") 'ivy-beginning-of-buffer)
     (define-key map (kbd "M->") 'ivy-end-of-buffer)
+    (define-key map (kbd "<left>") 'ivy-beginning-of-buffer)
+    (define-key map (kbd "<right>") 'ivy-end-of-buffer)
     (define-key map (kbd "M-n") 'ivy-next-history-element)
     (define-key map (kbd "M-p") 'ivy-previous-history-element)
     (define-key map (kbd "C-g") 'minibuffer-keyboard-quit)
+    (define-key map (kbd "C-v") 'ivy-scroll-up-command)
+    (define-key map (kbd "M-v") 'ivy-scroll-down-command)
+    (define-key map (kbd "C-M-n") 'ivy-next-line-and-call)
+    (define-key map (kbd "C-M-p") 'ivy-previous-line-and-call)
+    (define-key map (kbd "M-q") 'ivy-toggle-regexp-quote)
     map)
   "Keymap used in the minibuffer.")
 
@@ -90,14 +113,129 @@ This is usually meant as a quick exit out of the minibuffer."
 Maximum length of the history list is determined by the value
 of `history-length', which see.")
 
+(defvar ivy-require-match t
+  "Store require-match. See `completing-read'.")
+
+(defvar ivy--directory nil
+  "Current directory when completing file names.")
+
+(defvar ivy--length 0
+  "Store the amount of viable candidates.")
+
+(defvar ivy-text ""
+  "Store the user's string as it is typed in.")
+
+(defvar ivy-window nil
+  "Store the window in which `ivy-read' was called.")
+
+(defvar ivy--current ""
+  "Current candidate.")
+
+(defvar ivy--index 0
+  "Store the index of the current candidate.")
+
+(defvar ivy-exit nil
+  "Store 'done if the completion was successfully selected.
+Otherwise, store nil.")
+
+(defvar ivy--action nil
+  "Store a function to call at the end of `ivy--read'.")
+
+(defvar ivy--persistent-action nil
+  "Store a function to call for current candidate without exiting.")
+
+(defvar ivy--all-candidates nil
+  "Store the candidates passed to `ivy-read'.")
+
+(defvar ivy--default nil
+  "Default initial input.")
+
+(defvar ivy--update-fn nil
+  "Current function to call when current candidate(s) update.")
+
+(defvar ivy--prompt nil
+  "Store the format-style prompt.
+When non-nil, it should contain one %d.")
+
+(defvar ivy--old-re nil
+  "Store the old regexp.")
+
+(defvar ivy--old-cands nil
+  "Store the candidates matched by `ivy--old-re'.")
+
+(defvar ivy--regex-function 'ivy--regex
+  "Current function for building a regex.")
+
 ;;** Commands
 (defun ivy-done ()
   "Exit the minibuffer with the selected candidate."
   (interactive)
   (delete-minibuffer-contents)
-  (unless (zerop ivy--length)
-    (insert ivy--current)
-    (setq ivy-exit 'done))
+  (when (cond (ivy--directory
+               (insert
+                (cond ((string= ivy-text "")
+                       (if (equal ivy--current "./")
+                           ivy--directory
+                         (if (string-match "\\*" ivy--current)
+                             ivy--current
+                           (expand-file-name ivy--current ivy--directory))))
+                      ((zerop ivy--length)
+                       (expand-file-name ivy-text ivy--directory))
+                      (t
+                       (expand-file-name ivy--current ivy--directory))))
+               (setq ivy-exit 'done))
+              ((zerop ivy--length)
+               (if (memq ivy-require-match
+                         '(nil confirm confirm-after-completion))
+                   (progn
+                     (insert ivy-text)
+                     (setq ivy-exit 'done))
+                 (unless (string-match "match required" ivy--prompt)
+                   (setq ivy--prompt
+                         (if (string-match ": $" ivy--prompt)
+                             (concat
+                              (substring ivy--prompt 0 -2)
+                              " (match required): ")
+                           (concat
+                            ivy--prompt
+                            "(match required) "))))
+                 (insert ivy-text)
+                 (ivy--exhibit)
+                 nil))
+              (t
+               (insert ivy--current)
+               (setq ivy-exit 'done)))
+    (exit-minibuffer)))
+
+(defun ivy-alt-done (&optional arg)
+  "Exit the minibuffer with the selected candidate.
+When ARG is t, exit with current text, ignoring the candidates."
+  (interactive "P")
+  (if arg
+      (ivy-immediate-done)
+    (let (dir)
+      (cond ((and ivy--directory
+                  (= 0 ivy--index)
+                  (= 0 (length ivy-text)))
+             (ivy-done))
+
+            ((and ivy--directory
+                  (cl-plusp ivy--length)
+                  (file-directory-p
+                   (setq dir (expand-file-name
+                              ivy--current ivy--directory))))
+             (ivy--cd dir)
+             (ivy--exhibit))
+
+            (t
+             (ivy-done))))))
+
+(defun ivy-immediate-done ()
+  "Exit the minibuffer with the current input."
+  (interactive)
+  (delete-minibuffer-contents)
+  (insert ivy-text)
+  (setq ivy-exit 'done)
   (exit-minibuffer))
 
 (defun ivy-beginning-of-buffer ()
@@ -110,6 +248,18 @@ of `history-length', which see.")
   (interactive)
   (setq ivy--index (1- ivy--length)))
 
+(defun ivy-scroll-up-command ()
+  "Scroll the candidates upward by the minibuffer height."
+  (interactive)
+  (setq ivy--index (min (+ ivy--index ivy-height)
+                        (1- ivy--length))))
+
+(defun ivy-scroll-down-command ()
+  "Scroll the candidates downward by the minibuffer height."
+  (interactive)
+  (setq ivy--index (max (- ivy--index ivy-height)
+                        0)))
+
 (defun ivy-next-line (&optional arg)
   "Move cursor vertically down ARG candidates."
   (interactive "p")
@@ -146,6 +296,24 @@ If the input is empty, select the previous history element instead."
     (ivy-previous-history-element 1))
   (ivy-previous-line arg))
 
+(defun ivy-next-line-and-call (&optional arg)
+  "Move cursor vertically down ARG candidates."
+  (interactive "p")
+  (ivy-next-line arg)
+  (ivy--exhibit)
+  (when ivy--persistent-action
+    (with-selected-window ivy-window
+      (funcall ivy--persistent-action ivy--current))))
+
+(defun ivy-previous-line-and-call (&optional arg)
+  "Move cursor vertically down ARG candidates."
+  (interactive "p")
+  (ivy-previous-line arg)
+  (ivy--exhibit)
+  (when ivy--persistent-action
+    (with-selected-window ivy-window
+      (funcall ivy--persistent-action ivy--current))))
+
 (defun ivy-previous-history-element (arg)
   "Forward to `previous-history-element' with ARG."
   (interactive "p")
@@ -158,19 +326,96 @@ If the input is empty, select the previous history element instead."
   (next-history-element arg)
   (move-end-of-line 1))
 
+(defun ivy--cd (dir)
+  "When completing file names, move to directory DIR."
+  (if (null ivy--directory)
+      (error "Unexpected")
+    (setq ivy--old-cands nil)
+    (setq ivy--all-candidates
+          (ivy--sorted-files (setq ivy--directory dir)))
+    (setq ivy-text "")
+    (delete-minibuffer-contents)))
+
 (defun ivy-backward-delete-char ()
   "Forward to `backward-delete-char'.
 On error (read-only), call `ivy-on-del-error-function'."
   (interactive)
-  (condition-case nil
-      (backward-delete-char 1)
-    (error
-     (when ivy-on-del-error-function
-       (funcall ivy-on-del-error-function)))))
+  (if (and ivy--directory (= (minibuffer-prompt-end) (point)))
+      (progn
+        (ivy--cd (file-name-directory
+                  (directory-file-name ivy--directory)))
+        (ivy--exhibit))
+    (condition-case nil
+        (backward-delete-char 1)
+      (error
+       (when ivy-on-del-error-function
+         (funcall ivy-on-del-error-function))))))
+
+(defvar ivy--regexp-quote 'regexp-quote
+  "Store the regexp quoting state.")
+
+(defun ivy-toggle-regexp-quote ()
+  "Toggle the regexp quoting."
+  (interactive)
+  (setq ivy--old-re nil)
+  (cl-rotatef ivy--regex-function ivy--regexp-quote))
+
+(defun ivy-sort-file-function-default (x y)
+  "Compare two files X and Y.
+Prioritize directories."
+  (if (get-text-property 0 'dirp x)
+      (if (get-text-property 0 'dirp y)
+          (string< x y)
+        t)
+    (if (get-text-property 0 'dirp y)
+        nil
+      (string< x y))))
+
+(defvar ivy-sort-functions-alist
+  '((read-file-name-internal . ivy-sort-file-function-default)
+    (internal-complete-buffer . nil)
+    (counsel-git-grep-function . nil)
+    (t . string-lessp))
+  "An alist of sorting functions for each collection function.
+For each entry, nil means no sorting.
+The entry associated to t is used for all fall-through cases.")
+
+(defvar ivy-re-builders-alist
+  '((t . ivy--regex))
+  "An alist of regex building functions for each collection function.
+Each function should take a string and return a valid regex.
+The entry associated to t is used for all fall-through cases.
+Possible choices: `ivy--regex', `regexp-quote'.")
+
+(defcustom ivy-sort-max-size 30000
+  "Sorting won't be done for collections larger than this."
+  :type 'integer)
+
+(defun ivy--sorted-files (dir)
+  "Return the list of files in DIR.
+Directories come first."
+  (let* ((default-directory dir)
+         (seq (all-completions "" 'read-file-name-internal))
+         sort-fn)
+    (if (equal dir "/")
+        seq
+      (setq seq (delete "./" (delete "../" seq)))
+      (when (eq (setq sort-fn (cdr (assoc 'read-file-name-internal
+                                          ivy-sort-functions-alist)))
+                'ivy-sort-file-function-default)
+        (setq seq (mapcar (lambda (x)
+                            (propertize x 'dirp (string-match-p "/$" x)))
+                          seq)))
+      (when sort-fn
+        (setq seq (cl-sort seq sort-fn)))
+      (dolist (dir ivy-extra-directories)
+        (push dir seq))
+      seq)))
 
 ;;** Entry Point
-(defun ivy-read (prompt collection
-                 &optional initial-input keymap preselect update-fn)
+(cl-defun ivy-read (prompt collection
+                           &key predicate require-match initial-input
+                           history preselect keymap update-fn sort)
   "Read a string in the minibuffer, with completion.
 
 PROMPT is a string to prompt with; normally it ends in a colon
@@ -187,53 +432,103 @@ KEYMAP is composed together with `ivy-minibuffer-map'.
 If PRESELECT is non-nil select the corresponding candidate out of
 the ones that match INITIAL-INPUT.
 
-UPDATE-FN is called each time the current candidate(s) is changed."
-  (cl-case (length collection)
-    (0 nil)
-    (1 (car collection))
-    (t
-     (setq ivy--index (or
-                       (and preselect
-                            (ivy--preselect-index
-                             collection initial-input preselect))
-                       0))
-     (setq ivy--old-re nil)
-     (setq ivy--old-cands nil)
-     (setq ivy-text "")
-     (setq ivy--all-candidates collection)
-     (setq ivy--update-fn update-fn)
-     (setq ivy-exit nil)
-     (setq ivy--default (or (thing-at-point 'symbol) ""))
-     (setq ivy--prompt
-           (cond ((string-match "%.*d" prompt)
-                  prompt)
-                 ((string-match "%.*d" ivy-count-format)
-                  (concat ivy-count-format prompt))
-                 (t
-                  nil)))
-     (setq ivy--action nil)
-     (prog1
-         (unwind-protect
-              (minibuffer-with-setup-hook
-                  #'ivy--minibuffer-setup
-                (let ((res (read-from-minibuffer
+UPDATE-FN is called each time the current candidate(s) is changed.
+
+When SORT is t, refer to `ivy-sort-functions-alist' for sorting."
+  (setq ivy--directory nil)
+  (setq ivy-require-match require-match)
+  (setq ivy-window (selected-window))
+  (setq ivy--regex-function
+        (or (and (functionp collection)
+                 (cdr (assoc collection ivy-re-builders-alist)))
+            (cdr (assoc t ivy-re-builders-alist))
+            'ivy--regex))
+  (setq ivy--subexps 0)
+  (setq ivy--regexp-quote 'regexp-quote)
+  (let (coll sort-fn)
+    (cond ((eq collection 'Info-read-node-name-1)
+           (if (equal Info-current-file "dir")
+               (setq coll
+                     (mapcar (lambda (x) (format "(%s)" x))
+                             (cl-delete-duplicates
+                              (all-completions "(" collection predicate)
+                              :test 'equal)))
+             (setq coll (all-completions "" collection predicate))))
+          ((eq collection 'read-file-name-internal)
+           (setq ivy--directory default-directory)
+           (setq coll
+                 (ivy--sorted-files default-directory))
+           (when initial-input
+             (unless (or require-match
+                         (equal initial-input default-directory))
+               (setq coll (cons initial-input coll)))
+             (setq initial-input nil)))
+          ((or (functionp collection)
+               (vectorp collection)
+               (listp (car collection)))
+           (setq coll (all-completions "" collection predicate)))
+          ((hash-table-p collection)
+           (error "Hash table as a collection unsupported"))
+          (t
+           (setq coll collection)))
+    (when sort
+      (if (and (functionp collection)
+               (setq sort-fn (assoc collection ivy-sort-functions-alist)))
+          (when (and (setq sort-fn (cdr sort-fn))
+                     (not (eq collection 'read-file-name-internal)))
+            (setq coll (cl-sort coll sort-fn)))
+        (if (and (setq sort-fn (cdr (assoc t ivy-sort-functions-alist)))
+                 (<= (length coll) ivy-sort-max-size))
+            (setq coll (cl-sort (copy-sequence coll) sort-fn)))))
+    (when preselect
+      (unless (or require-match
+                  (member preselect coll))
+        (setq coll (cons preselect coll))))
+    (setq ivy--index (or
+                      (and preselect
+                           (ivy--preselect-index
+                            coll initial-input preselect))
+                      0))
+    (setq ivy--old-re nil)
+    (setq ivy--old-cands nil)
+    (setq ivy-text "")
+    (setq ivy--all-candidates coll)
+    (setq ivy--update-fn update-fn)
+    (setq ivy-exit nil)
+    (setq ivy--default (or (thing-at-point 'symbol) ""))
+    (setq ivy--prompt
+          (cond ((string-match "%.*d" prompt)
+                 prompt)
+                ((string-match "%.*d" ivy-count-format)
+                 (concat ivy-count-format prompt))
+                (ivy--directory
+                 prompt)
+                (t
+                 nil)))
+    (setq ivy--action nil)
+    (prog1
+        (unwind-protect
+             (minibuffer-with-setup-hook
+                 #'ivy--minibuffer-setup
+               (let* ((hist (or history 'ivy-history))
+                      (res (read-from-minibuffer
                             prompt
                             initial-input
                             (make-composed-keymap keymap ivy-minibuffer-map)
                             nil
-                            'ivy-history)))
-                  (when (eq ivy-exit 'done)
-                    (pop ivy-history)
-                    (setq ivy-history
-                          (cons ivy-text (delete ivy-text ivy-history)))
-                    res)))
-           (remove-hook 'post-command-hook #'ivy--exhibit))
-       (when ivy--action
-         (funcall ivy--action))))))
+                            hist)))
+                 (when (eq ivy-exit 'done)
+                   (set hist (cons ivy-text
+                                   (delete ivy-text
+                                           (cdr (symbol-value hist)))))
+                   res)))
+          (remove-hook 'post-command-hook #'ivy--exhibit))
+      (when ivy--action
+        (funcall ivy--action)))))
 
 (defun ivy-completing-read (prompt collection
-                            &optional predicate _require-match initial-input
-                            &rest _ignore)
+                            &optional predicate require-match initial-input
+                              history def _inherit-input-method)
   "Read a string in the minibuffer, with completion.
 
 This is an interface that conforms to `completing-read', so that
@@ -243,26 +538,32 @@ PROMPT is a string to prompt with; normally it ends in a colon and a space.
 COLLECTION can be a list of strings, an alist, an obarray or a hash table.
 PREDICATE limits completion to a subset of COLLECTION.
 
-_REQUIRE-MATCH is ignored for now.
+REQUIRE-MATCH is stored into `ivy-require-match'. See `completing-read'.
 INITIAL-INPUT is a string that can be inserted into the minibuffer initially.
+_HISTORY is ignored for now.
+DEF is the default value.
+_INHERIT-INPUT-METHOD is ignored for now.
 
 The history, defaults and input-method arguments are ignored for now."
-  (cond ((functionp collection)
-         (error "Function as a collection unsupported"))
-        ((hash-table-p collection)
-         (error "Hash table as a collection unsupported"))
-        ((listp (car collection))
-         (setq collection (mapcar #'car collection))))
-  (when predicate
-    (setq collection (cl-remove-if-not predicate collection)))
-  (ivy-read prompt collection initial-input))
+  (when (listp def)
+    (setq def (car def)))
+  (ivy-read prompt collection
+            :predicate predicate
+            :require-match require-match
+            :initial-input initial-input
+            :preselect def
+            :history history
+            :keymap nil
+            :sort t))
 
 ;;;###autoload
 (define-minor-mode ivy-mode
     "Toggle Ivy mode on or off.
 With ARG, turn Ivy mode on if arg is positive, off otherwise.
 Turning on Ivy mode will set `completing-read-function' to
-`ivy-completing-read'."
+`ivy-completing-read'.
+
+\\{ivy-minibuffer-map}"
   :group 'ivy
   :global t
   :lighter " ivy"
@@ -270,9 +571,6 @@ Turning on Ivy mode will set `completing-read-function' to
       (setq completing-read-function 'ivy-completing-read)
     (setq completing-read-function 'completing-read-default)))
 
-(defvar ivy--action nil
-  "Store a function to call at the end of `ivy--read'.")
-
 (defun ivy--preselect-index (candidates initial-input preselect)
   "Return the index in CANDIDATES filtered by INITIAL-INPUT for PRESELECT."
   (when initial-input
@@ -281,17 +579,11 @@ Turning on Ivy mode will set `completing-read-function' to
            (lambda (x)
              (string-match initial-input x))
            candidates)))
-  (cl-position-if
-   (lambda (x)
-     (string-match preselect x))
-   candidates))
-
-(defvar ivy-text ""
-  "Stores the user's string as it is typed in.")
-
-(defvar ivy-exit nil
-  "Store 'done if the completion was successfully selected.
-Otherwise, store nil.")
+  (or (cl-position preselect candidates :test 'equal)
+      (cl-position-if
+       (lambda (x)
+         (string-match preselect x))
+       candidates)))
 
 ;;* Implementation
 ;;** Regex
@@ -302,9 +594,11 @@ Otherwise, store nil.")
   (make-hash-table :test 'equal)
   "Store pre-computed regex.")
 
-(defun ivy--regex (str)
-  "Re-build regex from STR in case it has a space."
-  (let ((hashed (gethash str ivy--regex-hash)))
+(defun ivy--regex (str &optional greedy)
+  "Re-build regex from STR in case it has a space.
+When GREEDY is non-nil, join words in a greedy way."
+  (let ((hashed (unless greedy
+                  (gethash str ivy--regex-hash))))
     (if hashed
         (prog1 (cdr hashed)
           (setq ivy--subexps (car hashed)))
@@ -317,9 +611,14 @@ Otherwise, store nil.")
                         (cons
                          (setq ivy--subexps (length subs))
                          (mapconcat
-                          (lambda (x) (format "\\(%s\\)" x))
+                          (lambda (x)
+                            (if (string-match "^\\\\(.*\\\\)$" x)
+                                x
+                              (format "\\(%s\\)" x)))
                           subs
-                          ".*"))))
+                          (if greedy
+                              ".*"
+                            ".*?")))))
                     ivy--regex-hash)))))
 
 ;;** Rest
@@ -329,31 +628,11 @@ Otherwise, store nil.")
   (set (make-local-variable 'minibuffer-default-add-function)
        (lambda ()
          (list ivy--default)))
-  (use-local-map (make-composed-keymap ivy-minibuffer-map
-                                       (current-local-map)))
   (setq-local max-mini-window-height ivy-height)
   (add-hook 'post-command-hook #'ivy--exhibit nil t)
   ;; show completions with empty input
   (ivy--exhibit))
 
-(defvar ivy--all-candidates nil
-  "Store the candidates passed to `ivy-read'.")
-
-(defvar ivy--index 0
-  "Store the index of the current candidate.")
-
-(defvar ivy--length 0
-  "Store the amount of viable candidates.")
-
-(defvar ivy--current ""
-  "Current candidate.")
-
-(defvar ivy--default nil
-  "Default initial input.")
-
-(defvar ivy--update-fn nil
-  "Current function to call when current candidate(s) update.")
-
 (defun ivy--input ()
   "Return the current minibuffer input."
   ;; assume one-line minibuffer input
@@ -367,15 +646,27 @@ Otherwise, store nil.")
     (goto-char (minibuffer-prompt-end))
     (delete-region (line-end-position) (point-max))))
 
-(defvar ivy--prompt nil
-  "Store the format-style prompt.
-When non-nil, it should contain one %d.")
+(defvar ivy--dynamic-function nil
+  "When this is non-nil, call it for each input change to get new candidates.")
+
+(defvar ivy--full-length nil
+  "When `ivy--dynamic-function' is non-nil, this can be the total amount of candidates.")
+
+(defvar ivy--old-text nil
+  "Store old `ivy-text' for dynamic completion.")
 
 (defun ivy--insert-prompt ()
   "Update the prompt according to `ivy--prompt'."
   (when ivy--prompt
     (let ((inhibit-read-only t)
-          (n-str (format ivy--prompt ivy--length)))
+          (n-str
+           (format
+            (if ivy--directory
+                (concat ivy--prompt (abbreviate-file-name ivy--directory))
+              ivy--prompt)
+            (or (and ivy--dynamic-function
+                     ivy--full-length)
+                ivy--length))))
       (save-excursion
         (goto-char (point-min))
         (delete-region (point-min) (minibuffer-prompt-end))
@@ -391,11 +682,31 @@ When non-nil, it should contain one %d.")
   "Insert Ivy completions display.
 Should be run via minibuffer `post-command-hook'."
   (setq ivy-text (ivy--input))
+  (if ivy--dynamic-function
+      ;; while-no-input would cause annoying
+      ;; "Waiting for process to die...done" message interruptions
+      (let ((inhibit-message t))
+       (while-no-input
+         (unless (equal ivy--old-text ivy-text)
+           (let ((store ivy--dynamic-function)
+                 (ivy--dynamic-function nil))
+             (setq ivy--all-candidates (funcall store ivy-text)))
+           (setq ivy--old-text ivy-text))
+         (ivy--insert-minibuffer (ivy--format ivy--all-candidates))))
+    (when ivy--directory
+      (if (string-match "/$" ivy-text)
+          (if (member ivy-text ivy--all-candidates)
+              (ivy--cd (expand-file-name ivy-text ivy--directory))
+            (ivy--cd "/"))
+        (if (string-match "~$" ivy-text)
+            (ivy--cd (expand-file-name "~/")))))
+    (ivy--insert-minibuffer
+     (ivy--format
+      (ivy--filter ivy-text ivy--all-candidates)))))
+
+(defun ivy--insert-minibuffer (text)
   (ivy--cleanup)
-  (let ((text (ivy-completions
-               ivy-text
-               ivy--all-candidates))
-        (buffer-undo-list t)
+  (let ((buffer-undo-list t)
         deactivate-mark)
     (when ivy--update-fn
       (funcall ivy--update-fn))
@@ -406,65 +717,88 @@ Should be run via minibuffer `post-command-hook'."
         (forward-line 1)
         (insert text)))))
 
-(defvar ivy--old-re nil
-  "Store the old regexp.")
-
-(defvar ivy--old-cands nil
-  "Store the candidates matched by `ivy--old-re'.")
-
 (defun ivy--add-face (str face)
   "Propertize STR with FACE.
 `font-lock-append-text-property' is used, since it's better than
 `propertize' or `add-face-text-property' in this case."
-  (font-lock-append-text-property 0 (length str) 'face face str)
+  (ignore-errors
+    (font-lock-append-text-property 0 (length str) 'face face str))
   str)
 
-(defun ivy-completions (name candidates)
-  "Return as text the current completions.
-NAME is a string of words separated by spaces that is used to
-build a regex.
-CANDIDATES is a list of strings."
-  (let* ((re (ivy--regex name))
-         (cands (if (and (equal re ivy--old-re)
-                         ivy--old-cands)
-                    ivy--old-cands
-                  (ignore-errors
-                    (cl-remove-if-not
-                     (lambda (x) (string-match re x))
-                     candidates))))
+(defun ivy--filter (name candidates)
+  "Return the matches for NAME for CANDIDATES.
+CANDIDATES are assumed to be static."
+  (let* ((re (funcall ivy--regex-function name))
+         (cands (cond ((and (equal re ivy--old-re)
+                            ivy--old-cands)
+                       ivy--old-cands)
+                      ((and ivy--old-re
+                            (not (string-match "\\\\" ivy--old-re))
+                            (not (equal ivy--old-re ""))
+                            (memq (cl-search
+                                   (if (string-match "\\\\)$" ivy--old-re)
+                                       (substring ivy--old-re 0 -2)
+                                     ivy--old-re)
+                                   re) '(0 2)))
+                       (ignore-errors
+                         (cl-remove-if-not
+                          (lambda (x) (string-match re x))
+                          ivy--old-cands)))
+                      (t
+                       (ignore-errors
+                         (cl-remove-if-not
+                          (lambda (x) (string-match re x))
+                          candidates)))))
          (tail (nthcdr ivy--index ivy--old-cands))
-         (ww (window-width))
          idx)
     (when (and tail ivy--old-cands)
       (unless (and (not (equal re ivy--old-re))
-                   (setq ivy--index (cl-position re cands :test 'equal)))
+                   (or (setq ivy--index
+                             (or
+                              (cl-position re cands
+                                           :test 'equal)
+                              (and ivy--directory
+                                   (cl-position
+                                    (concat re "/") cands
+                                    :test 'equal))))))
         (while (and tail (null idx))
           ;; Compare with eq to handle equal duplicates in cands
           (setq idx (cl-position (pop tail) cands)))
         (setq ivy--index (or idx 0))))
     (setq ivy--old-re re)
-    (setq ivy--length (length cands))
-    (setq ivy--old-cands cands)
-    (when (>= ivy--index ivy--length)
-      (setq ivy--index (max (1- ivy--length) 0)))
-    (if (null cands)
-        ""
-      (let* ((half-height (/ ivy-height 2))
-             (start (max 0 (- ivy--index half-height)))
-             (end (min (+ start (1- ivy-height)) ivy--length))
-             (cands (cl-subseq cands start end))
-             (index (min ivy--index half-height (1- (length cands)))))
-        (setq ivy--current (copy-sequence (nth index cands)))
-        (setf (nth index cands)
-              (ivy--add-face ivy--current 'ivy-current-match))
-        (let ((res (concat "\n" (mapconcat
-                                 (lambda (s)
-                                   (if (> (length s) ww)
-                                       (concat (substring s 0 (- ww 3)) "...")
-                                     s))
-                                 cands "\n"))))
-          (put-text-property 0 (length res) 'read-only nil res)
-          res)))))
+    (setq ivy--old-cands cands)))
+
+(defun ivy--format (cands)
+  "Return a string for CANDS suitable for display in the minibuffer.
+CANDS is a list of strings."
+  (setq ivy--length (length cands))
+  (when (>= ivy--index ivy--length)
+    (setq ivy--index (max (1- ivy--length) 0)))
+  (if (null cands)
+      ""
+    (let* ((half-height (/ ivy-height 2))
+           (start (max 0 (- ivy--index half-height)))
+           (end (min (+ start (1- ivy-height)) ivy--length))
+           (cands (cl-subseq cands start end))
+           (index (min ivy--index half-height (1- (length cands)))))
+      (when ivy--directory
+        (setq cands (mapcar (lambda (x)
+                              (if (string-match-p "/$" x)
+                                  (propertize x 'face 'ivy-subdir)
+                                x))
+                            cands)))
+      (setq ivy--current (copy-sequence (nth index cands)))
+      (setf (nth index cands)
+            (ivy--add-face ivy--current 'ivy-current-match))
+      (let* ((ww (window-width))
+             (res (concat "\n" (mapconcat
+                                (lambda (s)
+                                  (if (> (length s) ww)
+                                      (concat (substring s 0 (- ww 3)) "...")
+                                    s))
+                                cands "\n"))))
+        (put-text-property 0 (length res) 'read-only nil res)
+        res))))
 
 (provide 'ivy)