]> code.delx.au - gnu-emacs-elpa/blobdiff - ivy.el
ivy.el (ivy-alt-done): Refactor
[gnu-emacs-elpa] / ivy.el
diff --git a/ivy.el b/ivy.el
index 8839ba6caa7f36bbab0be3c56c472a853ce63992..f70c54f19a4fadafb017c7a5684b639982b859a5 100644 (file)
--- a/ivy.el
+++ b/ivy.el
@@ -37,6 +37,7 @@
 
 ;;; Code:
 (require 'cl-lib)
+(require 'ffap)
 
 ;;* Customization
 (defgroup ivy nil
   '((t (:inherit 'dired-directory)))
   "Face used by Ivy for highlighting subdirs in the alternatives.")
 
+(defface ivy-modified-buffer
+  '((t :inherit 'default))
+  "Face used by Ivy for highlighting modified file visiting buffers.")
+
 (defface ivy-remote
   '((t (:foreground "#110099")))
   "Face used by Ivy for highlighting remotes in the alternatives.")
 
 (defcustom ivy-count-format "%-4d "
   "The style of showing the current candidate count for `ivy-read'.
-Set this to nil if you don't want the count.  You can also set it
-to e.g. \"(%d/%d) \" if you want to see both the candidate index
-and the candidate count."
-  :type '(choice (const :tag "Count disabled" nil) string))
+Set this to \"\" if you don't want the count.  You can also set
+it to e.g. \"(%d/%d) \" if you want to see both the candidate
+index and the candidate count."
+  :type '(choice
+          (const :tag "Count disabled" "")
+          (const :tag "Count matches" "%-4d ")
+          (const :tag "Count matches and show current match" "(%d/%d) ")
+          string))
 
 (defcustom ivy-wrap nil
   "Whether to wrap around after the first and last candidate."
   :type 'boolean)
 
-(defcustom ivy-display-style nil
+(defcustom ivy-display-style (unless (version< emacs-version "24.5") 'fancy)
   "The style for formatting the minibuffer.
 
 By default, the matched strings will be copied as they are.
 
 With the fancy method, the matching parts of the regexp will be
-additionally highlighted, just like `swiper' does it."
+additionally highlighted, just like `swiper' does it.
+
+This setting depends on `add-face-text-property' - a C function
+available as of 24.5. It will behave poorly in earlier Emacs
+versions."
   :type '(choice
           (const :tag "Plain" nil)
           (const :tag "Fancy" fancy)))
@@ -100,10 +113,13 @@ This is usually meant as a quick exit out of the minibuffer."
 (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)
+  :type '(repeat :tag "Dirs"
+          (choice
+           (const :tag "Parent Directory" "../")
+           (const :tag "Current Directory" "./"))))
 
 (defcustom ivy-use-virtual-buffers nil
-  "When non-nil, add `recentf-mode' and bookmarks to the list of buffers."
+  "When non-nil, add `recentf-mode' and bookmarks to `ivy-switch-buffer'."
   :type 'boolean)
 
 (defvar ivy--actions-list nil
@@ -149,9 +165,13 @@ Only \"./\" and \"../\" apply here. They appear in reverse order."
     (define-key map (kbd "M-i") 'ivy-insert-current)
     (define-key map (kbd "C-o") 'hydra-ivy/body)
     (define-key map (kbd "M-o") 'ivy-dispatching-done)
+    (define-key map (kbd "C-M-o") 'ivy-dispatching-call)
     (define-key map (kbd "C-k") 'ivy-kill-line)
     (define-key map (kbd "S-SPC") 'ivy-restrict-to-matches)
     (define-key map (kbd "M-w") 'ivy-kill-ring-save)
+    (define-key map (kbd "C-'") 'ivy-avy)
+    (define-key map (kbd "C-M-a") 'ivy-read-action)
+    (define-key map (kbd "C-c C-o") 'ivy-occur)
     map)
   "Keymap used in the minibuffer.")
 (autoload 'hydra-ivy/body "ivy-hydra" "" t)
@@ -169,15 +189,23 @@ Only \"./\" and \"../\" apply here. They appear in reverse order."
   history preselect keymap update-fn sort
   ;; The window in which `ivy-read' was called
   window
+  ;; The buffer in which `ivy-read' was called
+  buffer
+  ;; The value of `ivy-text' to be used by `ivy-occur'
+  text
   action
   unwind
   re-builder
   matcher
   ;; When this is non-nil, call it for each input change to get new candidates
-  dynamic-collection)
+  dynamic-collection
+  caller)
 
 (defvar ivy-last nil
-  "The last parameters passed to `ivy-read'.")
+  "The last parameters passed to `ivy-read'.
+
+This should eventually become a stack so that you could use
+`ivy-read' recursively.")
 
 (defsubst ivy-set-action (action)
   (setf (ivy-state-action ivy-last) action))
@@ -238,6 +266,9 @@ When non-nil, it should contain one %d.")
 (defvar ivy--old-text ""
   "Store old `ivy-text' for dynamic completion.")
 
+(defvar ivy-case-fold-search 'auto
+  "Store the current overriding `case-fold-search'.")
+
 (defvar Info-current-file)
 
 (defmacro ivy-quit-and-run (&rest body)
@@ -250,11 +281,20 @@ When non-nil, it should contain one %d.")
                     ,@body))
      (minibuffer-keyboard-quit)))
 
+(defun ivy-exit-with-action (action)
+  "Quit the minibuffer and call ACTION afterwards."
+  (ivy-set-action
+   `(lambda (x)
+      (funcall ',action x)
+      (ivy-set-action ',(ivy-state-action ivy-last))))
+  (setq ivy-exit 'done)
+  (exit-minibuffer))
+
 (defmacro with-ivy-window (&rest body)
   "Execute BODY in the window from which `ivy-read' was called."
   (declare (indent 0)
            (debug t))
-  `(with-selected-window (ivy-state-window ivy-last)
+  `(with-selected-window (ivy--get-window ivy-last)
      ,@body))
 
 (defun ivy--done (text)
@@ -290,12 +330,11 @@ When non-nil, it should contain one %d.")
          (insert ivy-text)
          (ivy--exhibit))))
 
-(defun ivy-dispatching-done ()
-  "Select one of the available actions and call `ivy-done'."
+(defun ivy-read-action ()
+  "Change the action to one of the available ones."
   (interactive)
   (let ((actions (ivy-state-action ivy-last)))
-    (if (null (ivy--actionp actions))
-        (ivy-done)
+    (unless (null (ivy--actionp actions))
       (let* ((hint (concat ivy--current
                            "\n"
                            (mapconcat
@@ -309,14 +348,31 @@ When non-nil, it should contain one %d.")
                             "\n")
                            "\n"))
              (key (string (read-key hint)))
-             (action (assoc key (cdr actions))))
+             (action-idx (cl-position-if
+                          (lambda (x) (equal (car x) key))
+                          (cdr actions))))
         (cond ((string= key "\a"))
-              ((null action)
+              ((null action-idx)
                (error "%s is not bound" key))
               (t
                (message "")
-               (ivy-set-action (nth 1 action))
-               (ivy-done)))))))
+               (setcar actions (1+ action-idx))
+               (ivy-set-action actions)))))))
+
+(defun ivy-dispatching-done ()
+  "Select one of the available actions and call `ivy-done'."
+  (interactive)
+  (ivy-read-action)
+  (ivy-done))
+
+(defun ivy-dispatching-call ()
+  "Select one of the available actions and call `ivy-call'."
+  (interactive)
+  (let ((actions (copy-sequence (ivy-state-action ivy-last))))
+    (unwind-protect
+         (when (ivy-read-action)
+           (ivy-call))
+      (ivy-set-action actions))))
 
 (defun ivy-build-tramp-name (x)
   "Reconstruct X into a path.
@@ -337,16 +393,69 @@ When ARG is t, exit with current text, ignoring the candidates."
   (let (dir)
     (cond (arg
            (ivy-immediate-done))
-          ((and ivy--directory
-                (or
-                 (and
-                  (not (string= ivy--current "./"))
-                  (cl-plusp ivy--length)
+          (ivy--directory
+           (cond
+             ((equal ivy-text "/sudo::")
+              (setq dir (concat ivy-text ivy--directory))
+              (ivy--cd dir)
+              (ivy--exhibit))
+             ((or
+               (and
+                (not (equal ivy-text ""))
+                (ignore-errors
+                  (file-directory-p
+                   (setq dir
+                         (file-name-as-directory
+                          (expand-file-name
+                           ivy-text ivy--directory))))))
+               (and
+                (not (string= ivy--current "./"))
+                (cl-plusp ivy--length)
+                (ignore-errors
                   (file-directory-p
-                   (setq dir (expand-file-name
-                              ivy--current ivy--directory))))))
-           (ivy--cd dir)
-           (ivy--exhibit))
+                   (setq dir (file-name-as-directory
+                              (expand-file-name
+                               ivy--current ivy--directory)))))))
+              (ivy--cd dir)
+              (ivy--exhibit))
+             ((or (and (equal ivy--directory "/")
+                       (string-match "\\`[^/]+:.*:.*\\'" ivy-text))
+                  (string-match "\\`/[^/]+:.*:.*\\'" ivy-text))
+              (ivy-done))
+             ((or (and (equal ivy--directory "/")
+                       (cond ((string-match
+                               "\\`\\([^/]+?\\):\\(?:\\(.*\\)@\\)?\\(.*\\)\\'"
+                               ivy-text))
+                             ((string-match
+                               "\\`\\([^/]+?\\):\\(?:\\(.*\\)@\\)?\\(.*\\)\\'"
+                               ivy--current)
+                              (setq ivy-text ivy--current))))
+                  (string-match
+                   "\\`/\\([^/]+?\\):\\(?:\\(.*\\)@\\)?\\(.*\\)\\'"
+                   ivy-text))
+              (let ((method (match-string 1 ivy-text))
+                    (user (match-string 2 ivy-text))
+                    (rest (match-string 3 ivy-text))
+                    res)
+                (require 'tramp)
+                (dolist (x (tramp-get-completion-function method))
+                  (setq res (append res (funcall (car x) (cadr x)))))
+                (setq res (delq nil res))
+                (when user
+                  (dolist (x res)
+                    (setcar x user)))
+                (setq res (cl-delete-duplicates res :test #'equal))
+                (let* ((old-ivy-last ivy-last)
+                       (enable-recursive-minibuffers t)
+                       (host (ivy-read "Find File: "
+                                       (mapcar #'ivy-build-tramp-name res)
+                                       :initial-input rest)))
+                  (setq ivy-last old-ivy-last)
+                  (when host
+                    (setq ivy--directory "/")
+                    (ivy--cd (concat "/" method ":" host ":"))))))
+             (t
+              (ivy-done))))
           ((eq (ivy-state-collection ivy-last) 'Info-read-node-name-1)
            (if (or (equal ivy--current "(./)")
                    (equal ivy--current "(../)"))
@@ -357,34 +466,6 @@ When ARG is t, exit with current text, ignoring the candidates."
                                      (expand-file-name x ivy--directory)
                                      "Top"))))
              (ivy-done)))
-          ((and ivy--directory
-                (string-match "\\`/[^/]+:.*:.*\\'" ivy-text))
-           (ivy-done))
-          ((and ivy--directory
-                (string-match
-                 "\\`/\\([^/]+?\\):\\(?:\\(.*\\)@\\)?\\(.*\\)\\'"
-                 ivy-text))
-           (let ((method (match-string 1 ivy-text))
-                 (user (match-string 2 ivy-text))
-                 (rest (match-string 3 ivy-text))
-                 res)
-             (require 'tramp)
-             (dolist (x (tramp-get-completion-function method))
-               (setq res (append res (funcall (car x) (cadr x)))))
-             (setq res (delq nil res))
-             (when user
-               (dolist (x res)
-                 (setcar x user)))
-             (setq res (cl-delete-duplicates res :test #'equal))
-             (let* ((old-ivy-last ivy-last)
-                    (enable-recursive-minibuffers t)
-                    (host (ivy-read "Find File: "
-                                    (mapcar #'ivy-build-tramp-name res)
-                                    :initial-input rest)))
-               (setq ivy-last old-ivy-last)
-               (when host
-                 (setq ivy--directory "/")
-                 (ivy--cd (concat "/" method ":" host ":"))))))
           (t
            (ivy-done)))))
 
@@ -397,13 +478,16 @@ When ARG is t, exit with current text, ignoring the candidates."
 If the text hasn't changed as a result, forward to `ivy-alt-done'."
   (interactive)
   (if (and (eq (ivy-state-collection ivy-last) #'read-file-name-internal)
-           (string-match "\\`/" ivy-text))
+           (or (and (equal ivy--directory "/")
+                    (string-match "\\`[^/]+:.*\\'" ivy-text))
+               (string-match "\\`/" ivy-text)))
       (let ((default-directory ivy--directory))
         (minibuffer-complete)
         (setq ivy-text (ivy--input))
-        (when (and (file-directory-p ivy-text)
-                   (= ivy--length 1))
-          (ivy--cd (expand-file-name ivy-text))))
+        (when (file-directory-p
+               (expand-file-name ivy-text ivy--directory))
+          (ivy--cd (file-name-as-directory
+                    (expand-file-name ivy-text ivy--directory)))))
     (or (ivy-partial)
         (when (or (eq this-command last-command)
                   (eq ivy--length 1))
@@ -419,7 +503,10 @@ If the text hasn't changed as a result, forward to `ivy-alt-done'."
          (new (try-completion (if startp
                                   (substring postfix 1)
                                 postfix)
-                              (mapcar (lambda (str) (substring str (string-match postfix str)))
+                              (mapcar (lambda (str)
+                                        (let ((i (string-match postfix str)))
+                                          (when i
+                                            (substring str i))))
                                       ivy--old-cands))))
     (cond ((eq new t) nil)
           ((string= new ivy-text) nil)
@@ -437,7 +524,10 @@ If the text hasn't changed as a result, forward to `ivy-alt-done'."
   "Exit the minibuffer with the current input."
   (interactive)
   (delete-minibuffer-contents)
-  (insert (setq ivy--current ivy-text))
+  (insert (setq ivy--current
+                (if ivy--directory
+                    (expand-file-name ivy-text ivy--directory)
+                  ivy-text)))
   (setq ivy-exit 'done)
   (exit-minibuffer))
 
@@ -445,24 +535,26 @@ If the text hasn't changed as a result, forward to `ivy-alt-done'."
 (defun ivy-resume ()
   "Resume the last completion session."
   (interactive)
-  (ivy-read
-   (ivy-state-prompt ivy-last)
-   (ivy-state-collection ivy-last)
-   :predicate (ivy-state-predicate ivy-last)
-   :require-match (ivy-state-require-match ivy-last)
-   :initial-input ivy-text
-   :history (ivy-state-history ivy-last)
-   :preselect (unless (eq (ivy-state-collection ivy-last)
-                          'read-file-name-internal)
-                ivy--current)
-   :keymap (ivy-state-keymap ivy-last)
-   :update-fn (ivy-state-update-fn ivy-last)
-   :sort (ivy-state-sort ivy-last)
-   :action (ivy-state-action ivy-last)
-   :unwind (ivy-state-unwind ivy-last)
-   :re-builder (ivy-state-re-builder ivy-last)
-   :matcher (ivy-state-matcher ivy-last)
-   :dynamic-collection (ivy-state-dynamic-collection ivy-last)))
+  (with-current-buffer (ivy-state-buffer ivy-last)
+    (ivy-read
+     (ivy-state-prompt ivy-last)
+     (ivy-state-collection ivy-last)
+     :predicate (ivy-state-predicate ivy-last)
+     :require-match (ivy-state-require-match ivy-last)
+     :initial-input ivy-text
+     :history (ivy-state-history ivy-last)
+     :preselect (unless (eq (ivy-state-collection ivy-last)
+                            'read-file-name-internal)
+                  ivy--current)
+     :keymap (ivy-state-keymap ivy-last)
+     :update-fn (ivy-state-update-fn ivy-last)
+     :sort (ivy-state-sort ivy-last)
+     :action (ivy-state-action ivy-last)
+     :unwind (ivy-state-unwind ivy-last)
+     :re-builder (ivy-state-re-builder ivy-last)
+     :matcher (ivy-state-matcher ivy-last)
+     :dynamic-collection (ivy-state-dynamic-collection ivy-last)
+     :caller (ivy-state-caller ivy-last))))
 
 (defvar ivy-calling nil
   "When non-nil, call the current action when `ivy--index' changes.")
@@ -487,13 +579,13 @@ If the text hasn't changed as a result, forward to `ivy-alt-done'."
 (defun ivy-scroll-up-command ()
   "Scroll the candidates upward by the minibuffer height."
   (interactive)
-  (ivy-set-index (min (+ ivy--index ivy-height)
+  (ivy-set-index (min (1- (+ ivy--index ivy-height))
                       (1- ivy--length))))
 
 (defun ivy-scroll-down-command ()
   "Scroll the candidates downward by the minibuffer height."
   (interactive)
-  (ivy-set-index (max (- ivy--index ivy-height)
+  (ivy-set-index (max (1+ (- ivy--index ivy-height))
                       0)))
 
 (defun ivy-minibuffer-grow ()
@@ -562,6 +654,15 @@ If the input is empty, select the previous history element instead."
           action
         (cadr (nth (car action) action))))))
 
+(defun ivy--get-window (state)
+  "Get the window from STATE."
+  (let ((window (ivy-state-window state)))
+    (if (window-live-p window)
+        window
+      (if (= (length (window-list)) 1)
+          (selected-window)
+        (next-window)))))
+
 (defun ivy--actionp (x)
   "Return non-nil when X is a list of actions."
   (and x (listp x) (not (eq (car x) 'closure))))
@@ -607,7 +708,8 @@ If the input is empty, select the previous history element instead."
         (prog1 (funcall action x)
           (unless (or (eq ivy-exit 'done)
                       (equal (selected-window)
-                             (active-minibuffer-window)))
+                             (active-minibuffer-window))
+                      (null (active-minibuffer-window)))
             (select-window (active-minibuffer-window))))))))
 
 (defun ivy-next-line-and-call (&optional arg)
@@ -646,15 +748,21 @@ Call the permanent action if possible."
   "Check if the current input points to a different directory.
 If so, move to that directory, while keeping only the file name."
   (when ivy--directory
-    (let* ((input (expand-file-name (ivy--input)))
-           (file (file-name-nondirectory input))
-           (dir (expand-file-name (file-name-directory input))))
-      (if (string= dir ivy--directory)
-          (progn
-            (delete-minibuffer-contents)
-            (insert file))
-        (ivy--cd dir)
-        (insert file)))))
+    (let ((input (ivy--input))
+          url)
+      (if (setq url (ffap-url-p input))
+          (ivy-exit-with-action
+           (lambda (_)
+             (funcall ffap-url-fetcher url)))
+        (setq input (expand-file-name input))
+        (let ((file (file-name-nondirectory input))
+              (dir (expand-file-name (file-name-directory input))))
+          (if (string= dir ivy--directory)
+              (progn
+                (delete-minibuffer-contents)
+                (insert file))
+            (ivy--cd dir)
+            (insert file)))))))
 
 (defun ivy--maybe-scroll-history ()
   "If the selected history element has an index, scroll there."
@@ -744,6 +852,52 @@ On error (read-only), call `ivy-on-del-error-function'."
   (setq ivy--old-re nil)
   (cl-rotatef ivy--regex-function ivy--regexp-quote))
 
+(defvar avy-all-windows)
+(defvar avy-action)
+(defvar avy-keys)
+(defvar avy-keys-alist)
+(defvar avy-style)
+(defvar avy-styles-alist)
+(declare-function avy--process "ext:avy")
+(declare-function avy--style-fn "ext:avy")
+
+(eval-after-load 'avy
+  '(add-to-list 'avy-styles-alist '(ivy-avy . pre)))
+
+(defun ivy-avy ()
+  "Jump to one of the current ivy candidates."
+  (interactive)
+  (unless (require 'avy nil 'noerror)
+    (error "Package avy isn't installed"))
+  (let* ((avy-all-windows nil)
+         (avy-keys (or (cdr (assq 'ivy-avy avy-keys-alist))
+                       avy-keys))
+         (avy-style (or (cdr (assq 'ivy-avy
+                                   avy-styles-alist))
+                        avy-style))
+         (candidate
+          (let ((candidates))
+            (save-excursion
+              (save-restriction
+                (narrow-to-region
+                 (window-start)
+                 (window-end))
+                (goto-char (point-min))
+                (forward-line)
+                (while (< (point) (point-max))
+                  (push
+                   (cons (point)
+                         (selected-window))
+                   candidates)
+                  (forward-line))))
+            (setq avy-action #'identity)
+            (avy--process
+             (nreverse candidates)
+             (avy--style-fn avy-style)))))
+    (ivy-set-index (- (line-number-at-pos candidate) 2))
+    (ivy--exhibit)
+    (ivy-done)))
+
 (defun ivy-sort-file-function-default (x y)
   "Compare two files X and Y.
 Prioritize directories."
@@ -755,7 +909,7 @@ Prioritize directories."
         nil
       (string< x y))))
 
-(defvar ivy-sort-functions-alist
+(defcustom ivy-sort-functions-alist
   '((read-file-name-internal . ivy-sort-file-function-default)
     (internal-complete-buffer . nil)
     (counsel-git-grep-function . nil)
@@ -769,7 +923,29 @@ For each entry, nil means no sorting.  It's very useful to turn
 off the sorting for functions that have candidates in the natural
 buffer order, like `org-refile' or `Man-goto-section'.
 
-The entry associated to t is used for all fall-through cases.")
+The entry associated to t is used for all fall-through cases.
+
+See also `ivy-sort-max-size'."
+  :type
+  '(alist
+    :key-type (choice
+               (const :tag "All other functions" t)
+               (symbol :tag "Function"))
+    :value-type (choice
+                 (const :tag "plain sort" string-lessp)
+                 (const :tag "file sort" ivy-sort-file-function-default)
+                 (const :tag "no sort" nil)))
+  :group 'ivy)
+
+(defvar ivy-index-functions-alist
+  '((swiper . ivy-recompute-index-swiper)
+    (swiper-multi . ivy-recompute-index-swiper)
+    (counsel-git-grep . ivy-recompute-index-swiper)
+    (t . ivy-recompute-index-zero))
+  "An alist of index recomputing functions for each collection function.
+When the input changes, calling the appropriate function will
+return an integer - the index of the matched candidate that
+should be selected.")
 
 (defvar ivy-re-builders-alist
   '((t . ivy--regex-plus))
@@ -827,7 +1003,7 @@ Directories come first."
 (cl-defun ivy-read (prompt collection
                     &key predicate require-match initial-input
                       history preselect keymap update-fn sort
-                      action unwind re-builder matcher dynamic-collection)
+                      action unwind re-builder matcher dynamic-collection caller)
   "Read a string in the minibuffer, with completion.
 
 PROMPT is a string to prompt with; normally it ends in a colon
@@ -836,7 +1012,8 @@ the current number of matching candidates.  If % appears elsewhere
 in the PROMPT it should be quoted as %%.
 See also `ivy-count-format'.
 
-COLLECTION is a list of strings.
+COLLECTION is a list of strings, or a function, or an alist, or a
+hash table.
 
 If INITIAL-INPUT is non-nil, insert it in the minibuffer initially.
 
@@ -858,8 +1035,13 @@ RE-BUILDER is a lambda that transforms text into a regex.
 
 MATCHER can completely override matching.
 
-DYNAMIC-COLLECTION is a function to call to update the list of
-candidates with each input."
+DYNAMIC-COLLECTION is a boolean that determines whether to update
+the list of candidates with each input by calling COLLECTION for
+the current input.
+
+CALLER is a symbol to uniquely identify the caller to `ivy-read'.
+It's used in conjunction with COLLECTION to indentify which
+customizations should apply to the current completion session."
   (let ((extra-actions (plist-get ivy--actions-list this-command)))
     (when extra-actions
       (setq action
@@ -868,55 +1050,60 @@ candidates with each input."
                   ("o" ,action "default")
                   ,@extra-actions)
               (delete-dups (append action extra-actions))))))
-  (setq ivy-last
-        (make-ivy-state
-         :prompt prompt
-         :collection collection
-         :predicate predicate
-         :require-match require-match
-         :initial-input initial-input
-         :history history
-         :preselect preselect
-         :keymap keymap
-         :update-fn update-fn
-         :sort sort
-         :action action
-         :window (selected-window)
-         :unwind unwind
-         :re-builder re-builder
-         :matcher matcher
-         :dynamic-collection dynamic-collection))
-  (ivy--reset-state ivy-last)
-  (prog1
-      (unwind-protect
-           (minibuffer-with-setup-hook
-               #'ivy--minibuffer-setup
-             (let* ((hist (or history 'ivy-history))
-                    (minibuffer-completion-table collection)
-                    (minibuffer-completion-predicate predicate)
-                    (resize-mini-windows (cond
-                                          ((display-graphic-p) nil)
-                                          ((null resize-mini-windows) 'grow-only)
-                                          (t resize-mini-windows)))
-                    (res (read-from-minibuffer
-                          prompt
-                          (ivy-state-initial-input ivy-last)
-                          (make-composed-keymap keymap ivy-minibuffer-map)
-                          nil
-                          hist)))
-               (when (eq ivy-exit 'done)
-                 (let ((item (if ivy--directory
-                                 ivy--current
-                               ivy-text)))
-                   (unless (equal item "")
-                     (set hist (cons (propertize item 'ivy-index ivy--index)
-                                     (delete item
-                                             (cdr (symbol-value hist)))))))
-                 res)))
-        (remove-hook 'post-command-hook #'ivy--exhibit)
-        (when (setq unwind (ivy-state-unwind ivy-last))
-          (funcall unwind)))
-    (ivy-call)))
+  (let ((recursive-ivy-last (and (window-minibuffer-p) ivy-last)))
+    (setq ivy-last
+          (make-ivy-state
+           :prompt prompt
+           :collection collection
+           :predicate predicate
+           :require-match require-match
+           :initial-input initial-input
+           :history history
+           :preselect preselect
+           :keymap keymap
+           :update-fn update-fn
+           :sort sort
+           :action action
+           :window (selected-window)
+           :buffer (current-buffer)
+           :unwind unwind
+           :re-builder re-builder
+           :matcher matcher
+           :dynamic-collection dynamic-collection
+           :caller caller))
+    (ivy--reset-state ivy-last)
+    (prog1
+        (unwind-protect
+             (minibuffer-with-setup-hook
+                 #'ivy--minibuffer-setup
+               (let* ((hist (or history 'ivy-history))
+                      (minibuffer-completion-table collection)
+                      (minibuffer-completion-predicate predicate)
+                      (resize-mini-windows (cond
+                                             ((display-graphic-p) nil)
+                                             ((null resize-mini-windows) 'grow-only)
+                                             (t resize-mini-windows)))
+                      (res (read-from-minibuffer
+                            prompt
+                            (ivy-state-initial-input ivy-last)
+                            (make-composed-keymap keymap ivy-minibuffer-map)
+                            nil
+                            hist)))
+                 (when (eq ivy-exit 'done)
+                   (let ((item (if ivy--directory
+                                   ivy--current
+                                 ivy-text)))
+                     (unless (equal item "")
+                       (set hist (cons (propertize item 'ivy-index ivy--index)
+                                       (delete item
+                                               (cdr (symbol-value hist)))))))
+                   res)))
+          (remove-hook 'post-command-hook #'ivy--exhibit)
+          (when (setq unwind (ivy-state-unwind ivy-last))
+            (funcall unwind)))
+      (ivy-call)
+      (when recursive-ivy-last
+        (ivy--reset-state (setq ivy-last recursive-ivy-last))))))
 
 (defun ivy--reset-state (state)
   "Reset the ivy to STATE.
@@ -936,6 +1123,7 @@ This is useful for recursive `ivy-read'."
       (setq initial-input (cdr (assoc this-command
                                       ivy-initial-inputs-alist))))
     (setq ivy--directory nil)
+    (setq ivy-case-fold-search 'auto)
     (setq ivy--regex-function
           (or re-builder
               (and (functionp collection)
@@ -966,7 +1154,9 @@ This is useful for recursive `ivy-read'."
                              (string= preselect-directory
                                       default-directory))
                    (setq ivy--directory preselect-directory))
-                 (setq preselect (file-name-nondirectory preselect))))
+                 (setf
+                  (ivy-state-preselect state)
+                  (setq preselect (file-name-nondirectory preselect)))))
              (setq coll (ivy--sorted-files ivy--directory))
              (when initial-input
                (unless (or require-match
@@ -979,10 +1169,9 @@ This is useful for recursive `ivy-read'."
             ((or (functionp collection)
                  (byte-code-function-p collection)
                  (vectorp collection)
-                 (listp (car collection)))
+                 (and (consp collection) (listp (car collection)))
+                 (hash-table-p collection))
              (setq coll (all-completions "" collection predicate)))
-            ((hash-table-p collection)
-             (error "Hash table as a collection unsupported"))
             (t
              (setq coll collection)))
       (when sort
@@ -1013,12 +1202,16 @@ This is useful for recursive `ivy-read'."
       (setq ivy--old-cands nil)
       (setq ivy--all-candidates coll))
     (setq ivy-exit nil)
-    (setq ivy--default (or (thing-at-point 'symbol) ""))
+    (setq ivy--default (or
+                        (thing-at-point 'url)
+                        (thing-at-point 'symbol)
+                        ""))
     (setq ivy--prompt
           (cond ((string-match "%.*d" prompt)
                  prompt)
                 ((null ivy-count-format)
-                 nil)
+                 (error
+                  "`ivy-count-format' can't be nil.  Set it to an empty string instead"))
                 ((string-match "%d.*%d" ivy-count-format)
                  (let ((w (length (number-to-string
                                    (length ivy--all-candidates))))
@@ -1050,13 +1243,19 @@ it can be used for `completing-read-function'.
 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 considered boolean. See `completing-read'.
+REQUIRE-MATCH is considered boolean.  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."
+  ;; See the doc of `completing-read'.
+  (when (consp history)
+    (when (numberp (cdr history))
+      (setq initial-input (nth (1- (cdr history))
+                               (symbol-value (car history)))))
+    (setq history (car history)))
   (ivy-read (replace-regexp-in-string "%" "%%" prompt)
             collection
             :predicate predicate
@@ -1112,11 +1311,15 @@ When MATCHER is non-nil it's used instead of `cl-remove-if-not'."
                  candidates))))
     (when matcher
       (setq candidates (funcall matcher "" candidates))))
-  (or (cl-position preselect candidates :test #'equal)
-      (cl-position-if
-       (lambda (x)
-         (string-match (regexp-quote preselect) x))
-       candidates)))
+  (cond ((integerp preselect)
+         preselect)
+        ((cl-position preselect candidates :test #'equal))
+        ((stringp preselect)
+         (let ((re (regexp-quote preselect)))
+           (cl-position-if
+            (lambda (x)
+              (string-match re x))
+            candidates)))))
 
 ;;* Implementation
 ;;** Regex
@@ -1296,17 +1499,21 @@ Insert .* between each char."
                                   ivy--full-length)
                              ivy--length)))
                ivy--prompt-extra
-               tail)
-              (if ivy--directory
-                  (abbreviate-file-name ivy--directory)
-                ""))))
+               tail)))
+            (d-str (if ivy--directory
+                       (abbreviate-file-name ivy--directory)
+                     "")))
         (save-excursion
           (goto-char (point-min))
           (delete-region (point-min) (minibuffer-prompt-end))
-          (when (> (length n-str) (- (window-width) 35))
-            (setq n-str (concat (substring n-str 0
-                                           (max (- (window-width) 35)
-                                                10)) "... ")))
+          (if (> (+ (mod (+ (length n-str) (length d-str)) (window-width))
+                    (length ivy-text))
+                 (window-width))
+              (setq n-str (concat n-str "\n" d-str))
+            (setq n-str (concat n-str d-str)))
+          (let ((regex (format "\\([^\n]\\{%d\\}\\)[^\n]" (window-width))))
+            (while (string-match regex n-str)
+              (setq n-str (replace-match (concat (match-string 1 n-str) "\n") nil t n-str 1))))
           (set-text-properties 0 (length n-str)
                                `(face minibuffer-prompt ,@std-props)
                                n-str)
@@ -1350,6 +1557,8 @@ Insert .* between each char."
   "Insert Ivy completions display.
 Should be run via minibuffer `post-command-hook'."
   (when (memq 'ivy--exhibit post-command-hook)
+    (let ((inhibit-field-text-motion nil))
+      (constrain-to-field nil (point-max)))
     (setq ivy-text (ivy--input))
     (if (ivy-state-dynamic-collection ivy-last)
         ;; while-no-input would cause annoying
@@ -1373,7 +1582,7 @@ Should be run via minibuffer `post-command-hook'."
                               (string-match "\\`[[:alpha:]]:/" default-directory))
                          (ivy--cd (match-string 0 default-directory))
                        (ivy--cd "/")))
-                   (when (string-match "[[:alpha:]]:/" ivy-text)
+                   (when (string-match "[[:alpha:]]:/$" ivy-text)
                      (let ((drive-root (match-string 0 ivy-text)))
                        (when (file-exists-p drive-root)
                          (ivy--cd drive-root)))))
@@ -1458,6 +1667,22 @@ all of the text contained in the minibuffer."
 (eval-after-load 'flx
   '(setq ivy--flx-cache (flx-make-string-cache)))
 
+(defun ivy-toggle-case-fold ()
+  "Toggle the case folding between nil and auto.
+In any completion session, the case folding starts in auto:
+
+- when the input is all lower case, `case-fold-search' is t
+- otherwise it's nil.
+
+You can toggle this to make `case-fold-search' nil regardless of input."
+  (interactive)
+  (setq ivy-case-fold-search
+        (if ivy-case-fold-search
+            nil
+          'auto))
+  ;; reset cache so that the candidate list updates
+  (setq ivy--old-re nil))
+
 (defun ivy--filter (name candidates)
   "Return all items that match NAME in CANDIDATES.
 CANDIDATES are assumed to be static."
@@ -1468,7 +1693,9 @@ CANDIDATES are assumed to be static."
         ivy--old-cands
       (let* ((re-str (if (listp re) (caar re) re))
              (matcher (ivy-state-matcher ivy-last))
-             (case-fold-search (string= name (downcase name)))
+             (case-fold-search
+              (and ivy-case-fold-search
+                   (string= name (downcase name))))
              (cands (cond
                       (matcher
                        (funcall matcher re candidates))
@@ -1497,39 +1724,118 @@ CANDIDATES are assumed to be static."
                                     (if (cdr re)
                                         #'cl-remove-if-not
                                       #'cl-remove-if)
-                                    (let ((re (car re)))
-                                      (lambda (x) (string-match re x)))
+                                    (let ((re-str (car re)))
+                                      (lambda (x) (string-match re-str x)))
                                     res))))
-                         res))))
-             (tail (nthcdr ivy--index ivy--old-cands))
-             idx)
-        (when (and tail ivy--old-cands (not (equal "^" ivy--old-re)))
-          (unless (and (not (equal re-str ivy--old-re))
-                       (or (setq ivy--index
-                                 (or
-                                  (cl-position (if (and (> (length re-str) 0)
-                                                        (eq ?^ (aref re-str 0)))
-                                                   (substring re-str 1)
-                                                 re-str) cands
-                                                 :test #'equal)
-                                  (and ivy--directory
-                                       (cl-position
-                                        (concat re-str "/") 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))))
-        (when (and (string= name "") (not (equal ivy--old-re "")))
-          (setq ivy--index
-                (or (cl-position (ivy-state-preselect ivy-last)
-                                 cands :test #'equal)
-                    ivy--index)))
+                         res)))))
+        (ivy--recompute-index name re-str cands)
         (setq ivy--old-re (if cands re-str ""))
-        (when (and (require 'flx nil 'noerror)
-                   (eq ivy--regex-function 'ivy--regex-fuzzy))
-          (setq cands (ivy--flx-sort name cands)))
-        (setq ivy--old-cands cands)))))
+        (setq ivy--old-cands (ivy--sort name cands))))))
+
+(defcustom ivy-sort-matches-functions-alist '((t . nil))
+  "An alist of functions used to sort the matching candidates.
+
+This is different from `ivy-sort-functions-alist', which is used
+to sort the whole collection only once.  The functions taken from
+here are instead used on each input change, but they are used
+only on already matching candidates, not on all of them.
+
+The alist KEY is a collection function or t to match previously
+not matched collection functions.
+
+The alist VAL is a sorting function with the signature of
+`ivy--prefix-sort'.")
+
+(defun ivy--sort-files-by-date (_name candidates)
+  "Re-soft CANDIDATES according to file modification date."
+  (let ((default-directory ivy--directory))
+    (cl-sort (copy-sequence candidates)
+             (lambda (f1 f2)
+               (time-less-p
+                (nth 5 (file-attributes f2))
+                (nth 5 (file-attributes f1)))))))
+
+(defun ivy--sort (name candidates)
+  "Re-sort CANDIDATES according to NAME.
+All CANDIDATES are assumed to match NAME."
+  (let ((key (or (ivy-state-caller ivy-last)
+                 (when (functionp (ivy-state-collection ivy-last))
+                   (ivy-state-collection ivy-last))))
+        fun)
+    (cond ((and (require 'flx nil 'noerror)
+                (eq ivy--regex-function 'ivy--regex-fuzzy))
+           (ivy--flx-sort name candidates))
+          ((setq fun (cdr (or (assoc key ivy-sort-matches-functions-alist)
+                              (assoc t ivy-sort-matches-functions-alist))))
+           (funcall fun name candidates))
+          (t
+           candidates))))
+
+(defun ivy--prefix-sort (name candidates)
+  "Re-sort CANDIDATES.
+Prefix matches to NAME are put ahead of the list."
+  (if (or (string-match "^\\^" name) (string= name ""))
+      candidates
+    (let ((re-prefix (concat "^" (funcall ivy--regex-function name)))
+          res-prefix
+          res-noprefix)
+      (dolist (s candidates)
+        (if (string-match re-prefix s)
+            (push s res-prefix)
+          (push s res-noprefix)))
+      (nconc
+       (nreverse res-prefix)
+       (nreverse res-noprefix)))))
+
+(defun ivy--recompute-index (name re-str cands)
+  (let* ((caller (ivy-state-caller ivy-last))
+         (func (or (and caller (cdr (assoc caller ivy-index-functions-alist)))
+                   (cdr (assoc t ivy-index-functions-alist))
+                   #'ivy-recompute-index-zero)))
+    (unless (eq this-command 'ivy-resume)
+      (setq ivy--index
+            (or
+             (cl-position (if (and (> (length re-str) 0)
+                                   (eq ?^ (aref re-str 0)))
+                              (substring re-str 1)
+                            re-str) cands
+                            :test #'equal)
+             (and ivy--directory
+                  (cl-position
+                   (concat re-str "/") cands
+                   :test #'equal))
+             (and (not (string= name ""))
+                  (not (and (require 'flx nil 'noerror)
+                            (eq ivy--regex-function 'ivy--regex-fuzzy)
+                            (< (length cands) 200)))
+
+                  (cl-position (nth ivy--index ivy--old-cands)
+                               cands))
+             (funcall func re-str cands))))
+    (when (and (or (string= name "")
+                   (string= name "^"))
+               (not (equal ivy--old-re "")))
+      (setq ivy--index
+            (or (ivy--preselect-index
+                 cands
+                 nil
+                 (ivy-state-preselect ivy-last)
+                 nil)
+                ivy--index)))))
+
+(defun ivy-recompute-index-swiper (_re-str cands)
+  (let ((tail (nthcdr ivy--index ivy--old-cands))
+        idx)
+    (if (and tail ivy--old-cands (not (equal "^" ivy--old-re)))
+        (progn
+          (while (and tail (null idx))
+            ;; Compare with eq to handle equal duplicates in cands
+            (setq idx (cl-position (pop tail) cands)))
+          (or idx 0))
+      ivy--index)))
+
+(defun ivy-recompute-index-zero (_re-str _cands)
+  0)
 
 (defun ivy--flx-sort (name cands)
   "Sort according to closeness to string NAME the string list CANDS."
@@ -1561,6 +1867,13 @@ CANDIDATES are assumed to be static."
   "Function to transform the list of candidates into a string.
 This string will be inserted into the minibuffer.")
 
+(defun ivy--truncate-string (str width)
+  "Truncate STR to WIDTH."
+  (if (> (string-width str) width)
+      (concat (substring str 0 (min (- width 3)
+                                    (- (length str) 3))) "...")
+    str))
+
 (defun ivy-format-function-default (cands)
   "Transform CANDS into a string for minibuffer."
   (if (bound-and-true-p truncate-lines)
@@ -1570,9 +1883,7 @@ This string will be inserted into the minibuffer.")
       (mapconcat
        (if truncate-lines
            (lambda (s)
-             (if (> (length s) ww)
-                 (concat (substring s 0 (- ww 3)) "...")
-               s))
+             (ivy--truncate-string s ww))
          #'identity)
        cands "\n"))))
 
@@ -1587,12 +1898,40 @@ This string will be inserted into the minibuffer.")
                s))
      cands "\n")))
 
-(defcustom swiper-minibuffer-faces
-  '(swiper-minibuffer-match-face-1
-    swiper-minibuffer-match-face-2
-    swiper-minibuffer-match-face-3
-    swiper-minibuffer-match-face-4)
-  "List of `swiper' faces for minibuffer group matches.")
+(defface ivy-minibuffer-match-face-1
+  '((((class color) (background light))
+     :background "#d3d3d3")
+    (((class color) (background dark))
+     :background "#555555"))
+  "The background face for `ivy' minibuffer matches.")
+
+(defface ivy-minibuffer-match-face-2
+  '((((class color) (background light))
+     :background "#e99ce8" :weight bold)
+    (((class color) (background dark))
+     :background "#777777" :weight bold))
+  "Face for `ivy' minibuffer matches modulo 1.")
+
+(defface ivy-minibuffer-match-face-3
+  '((((class color) (background light))
+     :background "#bbbbff" :weight bold)
+    (((class color) (background dark))
+     :background "#7777ff" :weight bold))
+  "Face for `ivy' minibuffer matches modulo 2.")
+
+(defface ivy-minibuffer-match-face-4
+  '((((class color) (background light))
+     :background "#ffbbff" :weight bold)
+    (((class color) (background dark))
+     :background "#8a498a" :weight bold))
+  "Face for `ivy' minibuffer matches modulo 3.")
+
+(defcustom ivy-minibuffer-faces
+  '(ivy-minibuffer-match-face-1
+    ivy-minibuffer-match-face-2
+    ivy-minibuffer-match-face-3
+    ivy-minibuffer-match-face-4)
+  "List of `ivy' faces for minibuffer group matches.")
 
 (defun ivy--format-minibuffer-line (str)
   (let ((start 0)
@@ -1607,12 +1946,12 @@ This string will be inserted into the minibuffer.")
           (while (<= i ivy--subexps)
             (let ((face
                    (cond ((zerop ivy--subexps)
-                          (cadr swiper-minibuffer-faces))
+                          (cadr ivy-minibuffer-faces))
                          ((zerop i)
-                          (car swiper-minibuffer-faces))
+                          (car ivy-minibuffer-faces))
                          (t
-                          (nth (1+ (mod (+ i 2) (1- (length swiper-minibuffer-faces))))
-                               swiper-minibuffer-faces)))))
+                          (nth (1+ (mod (+ i 2) (1- (length ivy-minibuffer-faces))))
+                               ivy-minibuffer-faces)))))
               (if (fboundp 'add-face-text-property)
                   (add-face-text-property
                    (match-beginning i)
@@ -1643,12 +1982,21 @@ CANDS is a list of strings."
            (start (max 0 (min start (- end (1- ivy-height)))))
            (cands (cl-subseq cands start end))
            (index (- ivy--index start)))
-      (when ivy--directory
-        (setq cands (mapcar (lambda (x)
-                              (if (string-match-p "/\\'" x)
-                                  (propertize x 'face 'ivy-subdir)
-                                x))
-                            cands)))
+      (cond (ivy--directory
+             (setq cands (mapcar (lambda (x)
+                                   (if (string-match-p "/\\'" x)
+                                       (propertize x 'face 'ivy-subdir)
+                                     x))
+                                 cands)))
+            ((eq (ivy-state-collection ivy-last) 'internal-complete-buffer)
+             (setq cands (mapcar (lambda (x)
+                                   (let ((b (get-buffer x)))
+                                     (if (and b
+                                              (buffer-file-name b)
+                                              (buffer-modified-p b))
+                                         (propertize x 'face 'ivy-modified-buffer)
+                                       x)))
+                                 cands))))
       (setq ivy--current (copy-sequence (nth index cands)))
       (setq cands (mapcar
                    #'ivy--format-minibuffer-line
@@ -1668,6 +2016,14 @@ CANDS is a list of strings."
 (defface ivy-virtual '((t :inherit font-lock-builtin-face))
   "Face used by Ivy for matching virtual buffer names.")
 
+(defcustom ivy-virtual-abbreviate 'name
+  "The mode of abbreviation for virtual buffer names."
+  :type '(choice
+          (const :tag "Only name" name)
+          (const :tag "Full path" full)
+          ;; eventually, uniquify
+          ))
+
 (defun ivy--virtual-buffers ()
   "Adapted from `ido-add-virtual-buffers-to-list'."
   (unless recentf-mode
@@ -1681,7 +2037,10 @@ CANDS is a list of strings."
                            (delq nil (mapcar (lambda (bookmark)
                                                (cdr (assoc 'filename bookmark)))
                                              bookmarks)))))
-      (setq name (file-name-nondirectory head))
+      (setq name
+            (if (eq ivy-virtual-abbreviate 'name)
+                (file-name-nondirectory head)
+              (expand-file-name head)))
       (when (equal name "")
         (setq name (file-name-nondirectory (directory-file-name head))))
       (when (equal name "")
@@ -1850,6 +2209,170 @@ The selected history element will be inserted into the minibufer."
   (setq ivy--all-candidates
         (ivy--filter ivy-text ivy--all-candidates)))
 
+;;* Occur
+(defvar-local ivy-occur-last nil
+  "Buffer-local value of `ivy-last'.
+Can't re-use `ivy-last' because using e.g. `swiper' in the same
+buffer would modify `ivy-last'.")
+
+(defvar ivy-occur-mode-map
+  (let ((map (make-sparse-keymap)))
+    (define-key map [mouse-1] 'ivy-occur-click)
+    (define-key map (kbd "RET") 'ivy-occur-press)
+    (define-key map (kbd "j") 'next-line)
+    (define-key map (kbd "k") 'previous-line)
+    (define-key map (kbd "h") 'backward-char)
+    (define-key map (kbd "l") 'forward-char)
+    (define-key map (kbd "g") 'ivy-occur-press)
+    (define-key map (kbd "a") 'ivy-occur-read-action)
+    (define-key map (kbd "o") 'ivy-occur-dispatch)
+    (define-key map (kbd "q") 'quit-window)
+    map)
+  "Keymap for Ivy Occur mode.")
+
+(define-derived-mode ivy-occur-mode fundamental-mode "Ivy-Occur"
+  "Major mode for output from \\[ivy-occur].
+
+\\{ivy-occur-mode-map}")
+
+(defvar ivy-occur-grep-mode-map
+  (let ((map (copy-keymap ivy-occur-mode-map)))
+    (define-key map (kbd "C-x C-q") 'ivy-wgrep-change-to-wgrep-mode)
+    map)
+  "Keymap for Ivy Occur Grep mode.")
+
+(define-derived-mode ivy-occur-grep-mode grep-mode "Ivy-Occur"
+  "Major mode for output from \\[ivy-occur].
+
+\\{ivy-occur-grep-mode-map}")
+
+(defvar counsel-git-grep-cmd)
+
+(defun ivy-occur ()
+  "Stop completion and put the current matches into a new buffer.
+
+The new buffer will also remember the current action(s).
+
+While in the *ivy-occur* buffer, selecting a cadidate with RET or
+a mouse click will call the appropriate action for that candidate.
+
+It's possible to have an unlimited amount of *ivy-occur* buffers."
+  (interactive)
+  (let ((buffer
+         (generate-new-buffer
+          (format "*ivy-occur%s \"%s\"*"
+                  (let (caller)
+                    (if (setq caller (ivy-state-caller ivy-last))
+                        (concat " " (prin1-to-string caller))
+                      ""))
+                  ivy-text)))
+        (do-grep (eq (ivy-state-caller ivy-last) 'counsel-git-grep)))
+    (with-current-buffer buffer
+      (if do-grep
+          (progn
+            (setq ivy--old-cands
+                  (split-string
+                   (shell-command-to-string
+                    (format counsel-git-grep-cmd ivy--old-re))
+                   "\n"
+                   t))
+            (ivy-occur-grep-mode))
+        (ivy-occur-mode))
+      (setf (ivy-state-text ivy-last) ivy-text)
+      (setq ivy-occur-last ivy-last)
+      (setq-local ivy--directory ivy--directory)
+      (let ((inhibit-read-only t))
+        (erase-buffer)
+        (when do-grep
+          ;; Need precise number of header lines for `wgrep' to work.
+          (insert (format "-*- mode:grep; default-directory: %S -*-\n\n\n"
+                          default-directory)))
+        (insert (format "%d candidates:\n" (length ivy--old-cands)))
+        (dolist (cand ivy--old-cands)
+          (let ((str (if do-grep
+                         (concat "./" cand)
+                       (concat "    " cand))))
+            (add-text-properties
+             0 (length str)
+             `(mouse-face
+               highlight
+               help-echo "mouse-1: call ivy-action")
+             str)
+            (insert str "\n")))))
+    (ivy-exit-with-action
+     `(lambda (_) (pop-to-buffer ,buffer)))))
+
+(declare-function wgrep-change-to-wgrep-mode "ext:wgrep")
+
+(defun ivy-wgrep-change-to-wgrep-mode ()
+  "Forward to `wgrep-change-to-wgrep-mode'."
+  (interactive)
+  (if (require 'wgrep nil 'noerror)
+      (wgrep-change-to-wgrep-mode)
+    (error "Package wgrep isn't installed")))
+
+(defun ivy-occur-read-action ()
+  "Select one of the available actions as the current one."
+  (interactive)
+  (let ((ivy-last ivy-occur-last))
+    (ivy-read-action)))
+
+(defun ivy-occur-dispatch ()
+  "Call one of the available actions on the current item."
+  (interactive)
+  (let* ((state-action (ivy-state-action ivy-occur-last))
+         (actions (if (symbolp state-action)
+                      state-action
+                    (copy-sequence state-action))))
+    (unwind-protect
+         (progn
+           (ivy-occur-read-action)
+           (ivy-occur-press))
+      (setf (ivy-state-action ivy-occur-last) actions))))
+
+(defun ivy-occur-click (event)
+  "Execute action for the current candidate.
+EVENT gives the mouse position."
+  (interactive "e")
+  (let ((window (posn-window (event-end event)))
+        (pos (posn-point (event-end event))))
+    (with-current-buffer (window-buffer window)
+      (goto-char pos)
+      (ivy-occur-press))))
+
+(defun ivy-occur-press ()
+  "Execute action for the current candidate."
+  (interactive)
+  (require 'pulse)
+  (when (save-excursion
+          (beginning-of-line)
+          (looking-at "\\(?:./\\|    \\)\\(.*\\)$"))
+    (let* ((ivy-last ivy-occur-last)
+           (ivy-text (ivy-state-text ivy-last))
+           (str (buffer-substring
+                 (match-beginning 1)
+                 (match-end 1)))
+           (coll (ivy-state-collection ivy-last))
+           (action (ivy--get-action ivy-last))
+           (ivy-exit 'done))
+      (with-ivy-window
+        (funcall action
+                 (if (and (consp coll)
+                          (consp (car coll)))
+                     (cdr (assoc str coll))
+                   str))
+        (if (memq (ivy-state-caller ivy-last)
+                  '(swiper counsel-git-grep))
+            (with-current-buffer (window-buffer (selected-window))
+              (swiper--cleanup)
+              (swiper--add-overlays
+               (ivy--regex ivy-text)
+               (line-beginning-position)
+               (line-end-position)
+               (selected-window))
+              (run-at-time 0.5 nil 'swiper--cleanup))
+          (pulse-momentary-highlight-one-line (point)))))))
+
 (provide 'ivy)
 
 ;;; ivy.el ends here