diff --git a/repos/ace-jump-mode/README.md b/repos/ace-jump-mode/README.md
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+Ace Jump Mode
+=============
+
+Ace jump mode is a minor mode of emacs, which help you to move the
+cursor within Emacs.  You can move your cursor to **ANY** position (
+across window and frame ) in emacs by using only **3 times key
+press**. Have a try and I am sure you will love it.
+
+
+What's new in 2.0 version?
+--------------------------
+
+In 1.0 version, ace jump mode can only work in current window.
+
+However, this limitation has already been broken in 2.0 version.  With
+ace jump mode 2.0, you can jump to any position you wish across the
+bounder of window(c-x 2/3) and even frame(c-x 5).
+
+
+Is there a demo to show the usage?
+------------------------------------
+Here is a simple one for you to learn how to use ace jump, [Demo](http://dl.dropbox.com/u/3254819/AceJumpModeDemo/AceJumpDemo.htm)
+
+Usage: 
+
+"C-c SPC" ==>  ace-jump-word-mode
+
+>enter first character of a word, select the highlighted key to move to it.
+
+"C-u C-c SPC" ==>  ace-jump-char-mode
+
+>enter a character for query, select the highlighted key to move to it.
+
+"C-u C-u C-c SPC" ==>  ace-jump-line-mode
+
+>each non-empty line will be marked, select the highlighted key to move to it.
+
+Thanks emacsrocks website, they make a great show to ace jump mode,
+refer to [here](http://www.youtube.com/watch?feature=player_embedded&v=UZkpmegySnc#!).
+
+
+How to install it?
+------------------
+
+    ;;
+    ;; ace jump mode major function
+    ;; 
+    (add-to-list 'load-path "/full/path/where/ace-jump-mode.el/in/")
+    (autoload
+      'ace-jump-mode
+      "ace-jump-mode"
+      "Emacs quick move minor mode"
+      t)
+    ;; you can select the key you prefer to
+    (define-key global-map (kbd "C-c SPC") 'ace-jump-mode)
+
+
+
+    ;; 
+    ;; enable a more powerful jump back function from ace jump mode
+    ;;
+    (autoload
+      'ace-jump-mode-pop-mark
+      "ace-jump-mode"
+      "Ace jump back:-)"
+      t)
+    (eval-after-load "ace-jump-mode"
+      '(ace-jump-mode-enable-mark-sync))
+    (define-key global-map (kbd "C-x SPC") 'ace-jump-mode-pop-mark)
+    
+    ;;If you use viper mode :
+    (define-key viper-vi-global-user-map (kbd "SPC") 'ace-jump-mode)
+    ;;If you use evil
+    (define-key evil-normal-state-map (kbd "SPC") 'ace-jump-mode)
+
+
+I want to know more about customized configuration?
+---------------------------------------------------
+See [FAQ ](http://github.com/winterTTr/ace-jump-mode/wiki/AceJump-FAQ)
diff --git a/repos/ace-jump-mode/ace-jump-mode.el b/repos/ace-jump-mode/ace-jump-mode.el
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+++ b/repos/ace-jump-mode/ace-jump-mode.el
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+;;; ace-jump-mode.el --- a quick cursor location minor mode for emacs -*- coding: utf-8-unix -*-
+
+;; Copyright (C) 2012 Free Software Foundation, Inc.
+
+;; Author   : winterTTr <winterTTr@gmail.com>
+;; URL      : https://github.com/winterTTr/ace-jump-mode/
+;; Version  : 2.0.RC
+;; Keywords : motion, location, cursor
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; INTRODUCTION
+;;
+
+;; What's this?
+;;
+;; It is a minor mode for Emacs. It can help you to move your cursor
+;; to ANY position in emacs by using only 3 times key press. 
+
+;; Where does ace jump mode come from ?
+;;
+;; I firstly see such kind of moving style is in a vim plugin called
+;; EasyMotion. It really attract me a lot. So I decide to write
+;; one for Emacs and MAKE IT BETTER.
+;;
+;; So I want to thank to :
+;;         Bartlomiej P.   for his PreciseJump
+;;         Kim Silkebækken for his EasyMotion
+
+
+;; What's ace-jump-mode ?
+;;
+;; ace-jump-mode is an fast/direct cursor location minor mode. It will
+;; create the N-Branch search tree internal and marks all the possible
+;; position with predefined keys in within the whole emacs view.
+;; Allowing you to move to the character/word/line almost directly.
+;;
+
+;;; Usage
+;;
+;; Add the following code to your init file, of course you can select
+;; the key that you prefer to.
+;; ----------------------------------------------------------
+;; ;;
+;; ;; ace jump mode major function
+;; ;; 
+;; (add-to-list 'load-path "/full/path/where/ace-jump-mode.el/in/")
+;; (autoload
+;;   'ace-jump-mode
+;;   "ace-jump-mode"
+;;   "Emacs quick move minor mode"
+;;   t)
+;; ;; you can select the key you prefer to
+;; (define-key global-map (kbd "C-c SPC") 'ace-jump-mode)
+;;
+;; ;; 
+;; ;; enable a more powerful jump back function from ace jump mode
+;; ;;
+;; (autoload
+;;   'ace-jump-mode-pop-mark
+;;   "ace-jump-mode"
+;;   "Ace jump back:-)"
+;;   t)
+;; (eval-after-load "ace-jump-mode"
+;;   '(ace-jump-mode-enable-mark-sync))
+;; (define-key global-map (kbd "C-x SPC") 'ace-jump-mode-pop-mark)
+;; 
+;; ;;If you use viper mode :
+;; (define-key viper-vi-global-user-map (kbd "SPC") 'ace-jump-mode)
+;; ;;If you use evil
+;; (define-key evil-normal-state-map (kbd "SPC") 'ace-jump-mode)
+;; ----------------------------------------------------------
+
+;;; For more information
+;; Intro Doc: https://github.com/winterTTr/ace-jump-mode/wiki
+;; FAQ      : https://github.com/winterTTr/ace-jump-mode/wiki/AceJump-FAQ
+
+;;; Code:
+
+(require 'cl)
+
+;;;; ============================================
+;;;; Utilities for ace-jump-mode
+;;;; ============================================
+
+;; ---------------------
+;; aj-position
+;; ---------------------
+
+;; make a position in a visual area
+(defstruct aj-position offset visual-area)
+
+(defmacro aj-position-buffer (aj-pos)
+  "Get the buffer object from `aj-position'."
+  `(aj-visual-area-buffer (aj-position-visual-area ,aj-pos)))
+
+(defmacro aj-position-window (aj-pos)
+  "Get the window object from `aj-position'."
+  `(aj-visual-area-window (aj-position-visual-area ,aj-pos)))
+
+(defmacro aj-position-frame (aj-pos)
+  "Get the frame object from `aj-position'."
+  `(aj-visual-area-frame (aj-position-visual-area ,aj-pos)))
+
+(defmacro aj-position-recover-buffer (aj-pos)
+  "Get the recover-buffer object from `aj-position'."
+  `(aj-visual-area-recover-buffer (aj-position-visual-area ,aj-pos)))
+
+
+;; ---------------------
+;; aj-visual-area
+;; ---------------------
+
+;; a record for all the possible visual area
+;; a visual area is a window that showing some buffer in some frame.
+(defstruct aj-visual-area buffer window frame recover-buffer)
+
+
+;; ---------------------
+;; a FIFO queue implementation
+;; ---------------------
+(defstruct aj-queue head tail)
+
+(defun aj-queue-push (item q)
+  "enqueue"
+  (let ( (head (aj-queue-head q) )
+         (tail (aj-queue-tail q) )
+         (c (list item) ) )
+    (cond
+     ((null (aj-queue-head q))
+      (setf (aj-queue-head q) c)
+      (setf (aj-queue-tail q) c))
+     (t
+      (setf (cdr (aj-queue-tail q)) c)
+      (setf (aj-queue-tail q) c)))))
+
+(defun aj-queue-pop (q)
+  "dequeue"
+  (if (null (aj-queue-head q))
+      (error "[AceJump] Interal Error: Empty queue"))
+
+  (let ((ret (aj-queue-head q)))
+    (if (eq ret (aj-queue-tail q))
+        ;; only one item left
+        (progn
+          (setf (aj-queue-head q) nil)
+          (setf (aj-queue-tail q) nil))
+      ;; multi item left, move forward the head
+      (setf (aj-queue-head q) (cdr ret)))
+    (car ret)))
+
+
+
+;;; main code start here
+
+;; register as a minor mode
+(or (assq 'ace-jump-mode minor-mode-alist)
+    (nconc minor-mode-alist
+           (list '(ace-jump-mode ace-jump-mode))))
+
+;; custoize variable
+(defvar ace-jump-word-mode-use-query-char t
+  "If we need to ask for the query char before enter `ace-jump-word-mode'")
+
+(defvar ace-jump-mode-case-fold case-fold-search
+  "If non-nil, the ace-jump mode will ignore case.
+
+The default value is set to the same as `case-fold-search'.")
+
+(defvar ace-jump-mode-mark-ring nil
+  "The list that is used to store the history for jump back.")
+
+(defvar ace-jump-mode-mark-ring-max 100
+  "The max length of `ace-jump-mode-mark-ring'")
+
+
+(defvar ace-jump-mode-gray-background t
+  "By default, when there is more than one candidate, the ace
+jump mode will gray the background and then mark the possible
+candidate position. Set this to nil means do not gray
+background.")
+
+(defvar ace-jump-mode-scope 'global
+  "Define what is the scope that ace-jump-mode works.
+
+Now, there are four kinds of values for this:
+1. 'global  : ace jump can work across any window and frame, this is also the default.
+2. 'frame   : ace jump will work for the all windows in current frame.
+3. 'visible : ace jump will work for all windows in visible frames.
+3. 'window  : ace jump will only work on current window only.
+              This is the same behavior for 1.0 version.")
+
+(defvar ace-jump-mode-detect-punc t
+  "When this is non-nil, the ace jump word mode will detect the
+char that is not alpha or number. Then, if the query char is a
+printable punctuaction, we will use char mode to start the ace
+jump mode. If it is nil, an error will come up when
+non-alpha-number is given under word mode.")
+
+
+(defvar ace-jump-mode-submode-list
+  '(ace-jump-word-mode
+    ace-jump-char-mode
+    ace-jump-line-mode)
+  "*The mode list when start ace jump mode.
+The sequence is the calling sequence when give prefix argument.
+
+Such as:
+  If you use the default sequence, which is
+      '(ace-jump-word-mode
+        ace-jump-char-mode
+        ace-jump-line-mode)
+and using key to start up ace jump mode, such as 'C-c SPC',
+then the usage to start each mode is as below:
+
+   C-c SPC           ==> ace-jump-word-mode
+   C-u C-c SPC       ==> ace-jump-char-mode
+   C-u C-u C-c SPC   ==> ace-jump-line-mode
+
+Currently, the valid submode is:
+   `ace-jump-word-mode'
+   `ace-jump-char-mode'
+   `ace-jump-line-mode'
+
+")
+
+(defvar ace-jump-mode-move-keys
+  (nconc (loop for i from ?a to ?z collect i)
+         (loop for i from ?A to ?Z collect i))
+  "*The keys that used to move when enter AceJump mode.
+Each key should only an printable character, whose name will
+fill each possible location.
+
+If you want your own moving keys, you can custom that as follow,
+for example, you only want to use lower case character:
+\(setq ace-jump-mode-move-keys (loop for i from ?a to ?z collect i)) ")
+
+
+;;; some internal variable for ace jump
+(defvar ace-jump-mode nil
+  "AceJump minor mode.")
+(defvar ace-jump-background-overlay-list nil
+  "Background overlay which will grey all the display.")
+(defvar ace-jump-search-tree nil
+  "N-branch Search tree. Every leaf node holds the overlay that
+is used to highlight the target positions.")
+(defvar ace-jump-query-char nil
+  "Save the query char used between internal mode.")
+(defvar ace-jump-current-mode nil
+  "Save the current mode.
+See `ace-jump-mode-submode-list' for possible value.")
+
+(defvar ace-jump-sync-emacs-mark-ring nil
+  "When this variable is not-nil, everytime `ace-jump-mode-pop-mark' is called,
+ace jump will try to remove the same mark from buffer local mark
+ring and global-mark-ring, which help you to sync the mark
+information between emacs and ace jump.
+
+Note, never try to set this variable manually, this is for ace
+jump internal use.  If you want to change it, use
+`ace-jump-mode-enable-mark-sync' or
+`ace-jump-mode-disable-mark-sync'.")
+
+(defvar ace-jump-search-filter nil
+  "This should be nil or a point-dependant predicate
+that `ace-jump-search-candidate' will use as an additional filter.")
+
+(defgroup ace-jump nil
+  "ace jump group"
+  :group 'convenience)
+
+;;; define the face
+(defface ace-jump-face-background
+  '((t (:foreground "gray40")))
+  "Face for background of AceJump motion"
+  :group 'ace-jump)
+
+
+(defface ace-jump-face-foreground
+  '((((class color)) (:foreground "red" :underline nil))
+    (((background dark)) (:foreground "gray100" :underline nil))
+    (((background light)) (:foreground "gray0" :underline nil))
+    (t (:foreground "gray100" :underline nil)))
+  "Face for foreground of AceJump motion"
+  :group 'ace-jump)
+
+
+(defvar ace-jump-mode-before-jump-hook nil
+  "Function(s) to call just before moving the cursor to a selected match")
+
+(defvar ace-jump-mode-end-hook nil
+  "Function(s) to call when ace-jump-mode is going to end up")
+
+(defvar ace-jump-allow-invisible nil
+  "Control if ace-jump should select the invisible char as candidate.
+Normally, the ace jump mark cannot be seen if the target character is invisible.
+So default to be nil, which will not include those invisible character as candidate.")
+
+
+(defun ace-jump-char-category ( query-char )
+  "Detect the type of the char.
+For the ascii table, refer to http://www.asciitable.com/
+
+There is four possible return value:
+1. 'digit: the number character
+2. 'alpha: A-Z and a-z
+3. 'punc : all the printable punctuaiton
+4. 'other: all the others"
+  (cond
+   ;; digit
+   ((and (>= query-char #x30) (<= query-char #x39))
+    'digit)
+   ((or
+     ;; capital letter
+     (and (>= query-char #x41) (<= query-char #x5A))
+     ;; lowercase letter
+     (and (>= query-char #x61) (<= query-char #x7A)))
+    'alpha)
+   ((or
+     ;; tab
+     (equal query-char #x9)
+     ;; punc before digit
+     (and (>= query-char #x20) (<= query-char #x2F))
+     ;; punc after digit before capital letter
+     (and (>= query-char #x3A) (<= query-char #x40))
+     ;; punc after capital letter before lowercase letter
+     (and (>= query-char #x5B) (<= query-char #x60))
+     ;; punc after lowercase letter
+     (and (>= query-char #x7B) (<= query-char #x7E)))
+    'punc)
+   (t
+    'other)))
+
+
+(defun ace-jump-search-candidate (re-query-string visual-area-list)
+  "Search the RE-QUERY-STRING in current view, and return the candidate position list.
+RE-QUERY-STRING should be an valid regex used for `search-forward-regexp'.
+
+You can control whether use the case sensitive or not by `ace-jump-mode-case-fold'.
+
+Every possible `match-beginning' will be collected.
+The returned value is a list of `aj-position' record."
+  (loop for va in visual-area-list
+        append (let* ((current-window (aj-visual-area-window va))
+                      (start-point (window-start current-window))
+                      (end-point   (window-end   current-window t)))
+                 (with-selected-window current-window
+                   (save-excursion
+                     (goto-char start-point)
+                     (let ((case-fold-search ace-jump-mode-case-fold))
+                       (loop while (re-search-forward re-query-string nil t)
+                             until (or
+                                    (> (point) end-point)
+                                    (eobp))
+                             if (and (or ace-jump-allow-invisible (not (invisible-p (match-beginning 0))))
+                                  (or (null ace-jump-search-filter)
+                                      (ignore-errors
+                                        (funcall ace-jump-search-filter))))
+                             collect (make-aj-position :offset (match-beginning 0)
+                                                       :visual-area va)
+                             ;; when we use "^" to search line mode,
+                             ;; re-search-backward will not move one
+                             ;; char after search success, as line
+                             ;; begin is not a valid visible char.
+                             ;; We need to help it to move forward.
+                             do (if (string-equal re-query-string "^")
+                                    (goto-char (1+ (match-beginning 0)))))))))))
+
+(defun ace-jump-tree-breadth-first-construct (total-leaf-node max-child-node)
+  "Constrct the search tree, each item in the tree is a cons cell.
+The (car tree-node) is the type, which should be only 'branch or 'leaf.
+The (cdr tree-node) is data stored in a leaf when type is 'leaf,
+while a child node list when type is 'branch"
+  (let ((left-leaf-node (- total-leaf-node 1))
+        (q (make-aj-queue))
+        (node nil)
+        (root (cons 'leaf nil)) )
+    ;; we push the node into queue and make candidate-sum -1, so
+    ;; create the start condition for the while loop
+    (aj-queue-push root q)
+    (while (> left-leaf-node 0)
+      (setq node (aj-queue-pop q))
+      ;; when a node is picked up from stack, it will be changed to a
+      ;; branch node, we lose a leaft node
+      (setf (car node) 'branch)
+      ;; so we need to add the sum of leaf nodes that we wish to create
+      (setq left-leaf-node (1+ left-leaf-node))
+      (if (<= left-leaf-node max-child-node)
+          ;; current child can fill the left leaf
+          (progn
+            (setf (cdr node)
+                  (loop for i from 1 to left-leaf-node
+                        collect (cons 'leaf nil)))
+            ;; so this should be the last action for while
+            (setq left-leaf-node 0))
+        ;; the child can not cover the left leaf
+        (progn
+          ;; fill as much as possible. Push them to queue, so it have
+          ;; the oppotunity to become 'branch node if necessary
+          (setf (cdr node)
+                (loop for i from 1 to max-child-node
+                      collect (let ((n (cons 'leaf nil)))
+                                (aj-queue-push n q)
+                                n)))
+          (setq left-leaf-node (- left-leaf-node max-child-node)))))
+    ;; return the root node
+    root))
+
+(defun ace-jump-tree-preorder-traverse (tree &optional leaf-func branch-func)
+  "we move over tree via preorder, and call BRANCH-FUNC on each branch
+node and call LEAF-FUNC on each leaf node"
+  ;; use stack to do preorder traverse
+  (let ((s (list tree)))
+    (while (not (null s))
+      ;; pick up one from stack
+      (let ((node (car s)))
+        ;; update stack
+        (setq s (cdr s))
+        (cond
+         ((eq (car node) 'branch)
+          ;; a branch node
+          (when branch-func
+            (funcall branch-func node))
+          ;; push all child node into stack
+          (setq s (append (cdr node) s)))
+         ((eq (car node) 'leaf)
+          (when leaf-func
+            (funcall leaf-func node)))
+         (t
+          (message "[AceJump] Internal Error: invalid tree node type")))))))
+
+
+(defun ace-jump-populate-overlay-to-search-tree (tree candidate-list)
+  "Populate the overlay to search tree, every leaf will give one overlay"
+  
+  (lexical-let* (;; create the locally dynamic variable for the following function
+                 (position-list candidate-list)
+                 
+                 ;; make the function to create overlay for each leaf node,
+                 ;; here we only create each overlay for each candidate
+                 ;; position, , but leave the 'display property to be empty,
+                 ;; which will be fill in "update-overlay" function
+                 (func-create-overlay (lambda (node)
+                                        (let* ((p (car position-list))
+                                               (o (aj-position-offset p))
+                                               (w (aj-position-window p))
+                                               (b (aj-position-buffer p))
+                                               ;; create one char overlay
+                                               (ol (make-overlay o (1+ o) b)))
+                                          ;; update leaf node to remember the ol
+                                          (setf (cdr node) ol)
+                                          (overlay-put ol 'face 'ace-jump-face-foreground)
+                                          ;; this is important, because sometimes the different
+                                          ;; window may dispaly the same buffer, in that case, 
+                                          ;; overlay for different window (but the same buffer)
+                                          ;; will show at the same time on both window
+                                          ;; So we make it only on the specific window
+                                          (overlay-put ol 'window w)
+                                          ;; associate the aj-position data with overlay
+                                          ;; so that we can use it to do the final jump
+                                          (overlay-put ol 'aj-data p)
+                                          ;; next candidate node
+                                          (setq position-list (cdr position-list))))))
+    (ace-jump-tree-preorder-traverse tree func-create-overlay)
+    tree))
+
+
+(defun ace-jump-delete-overlay-in-search-tree (tree)
+  "Delete all the overlay in search tree leaf node"
+  (let ((func-delete-overlay (lambda (node)
+                               (delete-overlay (cdr node))
+                               (setf (cdr node) nil))))
+    (ace-jump-tree-preorder-traverse tree func-delete-overlay)))
+
+(defun ace-jump-buffer-substring (pos)
+  "Get the char under the POS, which is aj-position structure."
+  (let* ((w (aj-position-window pos))
+         (offset (aj-position-offset pos)))
+    (with-selected-window w
+      (buffer-substring offset (1+ offset)))))
+
+(defun ace-jump-update-overlay-in-search-tree (tree keys)
+  "Update overlay 'display property using each name in keys"
+  (lexical-let* (;; create dynamic variable for following function
+                 (key ?\0)
+                 ;; populdate each leaf node to be the specific key,
+                 ;; this only update 'display' property of overlay,
+                 ;; so that user can see the key from screen and select
+                 (func-update-overlay
+                  (lambda (node)
+                    (let ((ol (cdr node)))
+                      (overlay-put
+                       ol
+                       'display
+                       (concat (make-string 1 key)
+                               (let* ((pos (overlay-get ol 'aj-data))
+                                      (subs (ace-jump-buffer-substring pos)))
+                                 (cond
+                                  ;; when tab, we use more space to prevent screen
+                                  ;; from messing up
+                                  ((string-equal subs "\t")
+                                   (make-string (1- tab-width) ? ))
+                                  ;; when enter, we need to add one more enter
+                                  ;; to make the screen not change
+                                  ((string-equal subs "\n")
+                                   "\n")
+                                  (t
+                                   ;; there are wide-width characters
+                                   ;; so, we need paddings
+                                   (make-string (max 0 (1- (string-width subs))) ? ))))))))))
+    (loop for k in keys
+          for n in (cdr tree)
+          do (progn
+               ;; update "key" variable so that the function can use
+               ;; the correct context
+               (setq key k)
+               (if (eq (car n) 'branch)
+                   (ace-jump-tree-preorder-traverse n
+                                                    func-update-overlay)
+                 (funcall func-update-overlay n))))))
+
+
+
+(defun ace-jump-list-visual-area()
+  "Based on `ace-jump-mode-scope', search the possible buffers that is showing now."
+  (cond
+   ((eq ace-jump-mode-scope 'global)
+    (loop for f in (frame-list)
+          append (loop for w in (window-list f)
+                       collect (make-aj-visual-area :buffer (window-buffer w)
+                                                    :window w
+                                                    :frame f))))
+   ((eq ace-jump-mode-scope 'visible)
+    (loop for f in (frame-list)
+          if (eq t (frame-visible-p f))
+          append (loop for w in (window-list f)
+                       collect (make-aj-visual-area :buffer (window-buffer w)
+                                                    :window w
+                                                    :frame f))))
+   ((eq ace-jump-mode-scope 'frame)
+    (loop for w in (window-list (selected-frame))
+          collect (make-aj-visual-area :buffer (window-buffer w)
+                                       :window w
+                                       :frame (selected-frame))))
+   ((eq ace-jump-mode-scope 'window)
+    (list 
+     (make-aj-visual-area :buffer (current-buffer)
+                          :window (selected-window)
+                          :frame  (selected-frame))))
+   (t
+    (error "[AceJump] Invalid ace-jump-mode-scope, please check your configuration"))))
+
+
+
+(defun ace-jump-do( re-query-string )
+  "The main function to start the AceJump mode.
+QUERY-STRING should be a valid regexp string, which finally pass to `search-forward-regexp'.
+
+You can constrol whether use the case sensitive via `ace-jump-mode-case-fold'.
+"
+  ;; we check the move key to make it valid, cause it can be customized by user
+  (if (or (null ace-jump-mode-move-keys)
+          (< (length ace-jump-mode-move-keys) 2)
+          (not (every #'characterp ace-jump-mode-move-keys)))
+      (error "[AceJump] Invalid move keys: check ace-jump-mode-move-keys"))
+  ;; search candidate position
+  (let* ((visual-area-list (ace-jump-list-visual-area))
+         (candidate-list (ace-jump-search-candidate re-query-string visual-area-list)))
+    (cond
+     ;; cannot find any one
+     ((null candidate-list)
+      (setq ace-jump-current-mode nil)
+      (error "[AceJump] No one found"))
+     ;; we only find one, so move to it directly
+     ((eq (cdr candidate-list) nil)
+      (ace-jump-push-mark)
+      (run-hooks 'ace-jump-mode-before-jump-hook)
+      (ace-jump-jump-to (car candidate-list))
+      (message "[AceJump] One candidate, move to it directly")
+      (run-hooks 'ace-jump-mode-end-hook))
+     ;; more than one, we need to enter AceJump mode
+     (t
+      ;; create background for each visual area
+      (if ace-jump-mode-gray-background
+          (setq ace-jump-background-overlay-list
+                (loop for va in visual-area-list
+                      collect (let* ((w (aj-visual-area-window va))
+                                     (b (aj-visual-area-buffer va))
+                                     (ol (make-overlay (window-start w)
+                                                       (window-end w)
+                                                       b)))
+                                (overlay-put ol 'face 'ace-jump-face-background)
+                                ol))))
+
+      ;; construct search tree and populate overlay into tree
+      (setq ace-jump-search-tree
+            (ace-jump-tree-breadth-first-construct (length candidate-list)
+                                                   (length ace-jump-mode-move-keys)))
+      (ace-jump-populate-overlay-to-search-tree ace-jump-search-tree
+                                                candidate-list)
+      (ace-jump-update-overlay-in-search-tree ace-jump-search-tree
+                                              ace-jump-mode-move-keys)
+
+      ;; do minor mode configuration
+      (cond
+       ((eq ace-jump-current-mode 'ace-jump-char-mode)
+        (setq ace-jump-mode " AceJump - Char"))
+       ((eq ace-jump-current-mode 'ace-jump-word-mode)
+        (setq ace-jump-mode " AceJump - Word"))
+       ((eq ace-jump-current-mode 'ace-jump-line-mode)
+        (setq ace-jump-mode " AceJump - Line"))
+       (t
+        (setq ace-jump-mode " AceJump")))
+      (force-mode-line-update)
+
+
+      ;; override the local key map
+      (setq overriding-local-map
+            (let ( (map (make-keymap)) )
+              (dolist (key-code ace-jump-mode-move-keys)
+                (define-key map (make-string 1 key-code) 'ace-jump-move))
+              (define-key map (kbd "C-c C-c") 'ace-jump-quick-exchange)
+              (define-key map [t] 'ace-jump-done)
+              map))
+
+      (add-hook 'mouse-leave-buffer-hook 'ace-jump-done)
+      (add-hook 'kbd-macro-termination-hook 'ace-jump-done)))))
+
+
+(defun ace-jump-jump-to (position)
+  "Jump to the POSITION, which is a `aj-position' structure storing the position information"
+  (let ((offset (aj-position-offset position))
+        (frame (aj-position-frame position))
+        (window (aj-position-window position))
+        (buffer (aj-position-buffer position))
+        (line-mode-column 0))
+
+    ;; save the column before do line jump, so that we can jump to the
+    ;; same column as previous line, make it the same behavior as C-n/C-p
+    (if (eq ace-jump-current-mode 'ace-jump-line-mode)
+        (setq line-mode-column (current-column)))
+
+    ;; focus to the frame
+    (if (and (frame-live-p frame)
+             (not (eq frame (selected-frame))))
+        (select-frame-set-input-focus (window-frame window)))
+    
+    ;; select the correct window
+    (if (and (window-live-p window)
+             (not (eq window (selected-window))))
+        (select-window window))
+
+    ;; swith to buffer
+    (if (and (buffer-live-p buffer)
+             (not (eq buffer (window-buffer window))))
+        (switch-to-buffer buffer))
+
+    ;; move to correct position
+    (if (and (buffer-live-p buffer)
+             (eq (current-buffer) buffer))
+        (goto-char offset))
+
+    ;; recover to the same column if we use the line jump mode
+    (if (eq ace-jump-current-mode 'ace-jump-line-mode)
+        (move-to-column line-mode-column))
+    ))
+
+(defun ace-jump-push-mark ()
+  "Push the current position information onto the `ace-jump-mode-mark-ring'."
+  ;; add mark to the emacs basic push mark
+  (push-mark (point) t)
+  ;; we also push the mark on the `ace-jump-mode-mark-ring', which has
+  ;; more information for better jump back
+  (let ((pos (make-aj-position :offset (point)
+                               :visual-area (make-aj-visual-area :buffer (current-buffer)
+                                                                 :window (selected-window)
+                                                                 :frame  (selected-frame)))))
+    (setq ace-jump-mode-mark-ring (cons pos ace-jump-mode-mark-ring)))
+  ;; when exeed the max count, discard the last one
+  (if (> (length ace-jump-mode-mark-ring) ace-jump-mode-mark-ring-max)
+      (setcdr (nthcdr (1- ace-jump-mode-mark-ring-max) ace-jump-mode-mark-ring) nil)))
+
+
+;;;###autoload
+(defun ace-jump-mode-pop-mark ()
+  "Pop up a postion from `ace-jump-mode-mark-ring', and jump back to that position"
+  (interactive)
+  ;; we jump over the killed buffer position
+  (while (and ace-jump-mode-mark-ring
+              (not (buffer-live-p (aj-position-buffer
+                                   (car ace-jump-mode-mark-ring)))))
+    (setq ace-jump-mode-mark-ring (cdr ace-jump-mode-mark-ring)))
+    
+  (if (null ace-jump-mode-mark-ring)
+      ;; no valid history exist
+      (error "[AceJump] No more history"))
+
+  (if ace-jump-sync-emacs-mark-ring
+      (let ((p (car ace-jump-mode-mark-ring)))
+        ;; if we are jump back in the current buffer, that means we
+        ;; only need to sync the buffer local mark-ring
+        (if (eq (current-buffer) (aj-position-buffer p))
+            (if (equal (aj-position-offset p) (marker-position (mark-marker)))
+                ;; if the current marker is the same as where we need
+                ;; to jump back, we do the same as pop-mark actually,
+                ;; copy implementation from pop-mark, cannot use it
+                ;; directly, as there is advice on it
+                (when mark-ring
+                  (setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker)))))
+                  (set-marker (mark-marker) (+ 0 (car mark-ring)) (current-buffer))
+                  (move-marker (car mark-ring) nil)
+                  (setq mark-ring (cdr mark-ring))
+                  (deactivate-mark))
+              
+              ;;  But if there is other marker put before the wanted destination, the following scenario
+              ;;                                                           
+              ;;             +---+---+---+---+                                   +---+---+---+---+
+              ;;   Mark Ring | 2 | 3 | 4 | 5 |                                   | 2 | 4 | 5 | 3 |
+              ;;             +---+---+---+---+                                   +---+---+---+---+
+              ;;             +---+                                               +---+
+              ;;   Marker    | 1 |                                               | 1 | <-- Maker (not changed)
+              ;;             +---+                                               +---+
+              ;;             +---+                                               +---+
+              ;;   Cursor    | X |                     Pop up AJ mark 3          | 3 | <-- Cursor position
+              ;;             +---+                                               +---+
+              ;;             +---+---+---+                                       +---+---+---+ 
+              ;;   AJ Ring   | 3 | 4 | 5 |                                       | 4 | 5 | 3 |
+              ;;             +---+---+---+                                       +---+---+---+
+              ;;   
+              ;; So what we need to do, is put the found mark in mark-ring to the end
+              (lexical-let ((po (aj-position-offset p)))
+                (setq mark-ring
+                      (ace-jump-move-first-to-end-if mark-ring
+                                                     (lambda (x)
+                                                       (equal (marker-position x) po))))))
+              
+
+          ;; when we jump back to another buffer, do as the
+          ;; pop-global-mark does. But we move the marker with the
+          ;; same target buffer to the end, not always the first one
+          (lexical-let ((pb (aj-position-buffer p)))
+            (setq global-mark-ring
+                  (ace-jump-move-first-to-end-if global-mark-ring
+                                                 (lambda (x)
+                                                   (eq (marker-buffer x) pb))))))))
+          
+  
+  ;; move the first element to the end of the ring
+  (ace-jump-jump-to (car ace-jump-mode-mark-ring))
+  (setq ace-jump-mode-mark-ring (nconc (cdr ace-jump-mode-mark-ring)
+                                       (list (car ace-jump-mode-mark-ring)))))
+
+(defun ace-jump-quick-exchange ()
+  "The function that we can use to quick exhange the current mode between
+word-mode and char-mode"
+  (interactive)
+  (cond
+   ((eq ace-jump-current-mode 'ace-jump-char-mode)
+    (if ace-jump-query-char
+        ;; ace-jump-done will clean the query char, so we need to save it
+        (let ((query-char ace-jump-query-char))
+          (ace-jump-done)
+          (ace-jump-word-mode query-char))))
+   ((eq ace-jump-current-mode 'ace-jump-word-mode)
+    (if ace-jump-query-char
+        ;; ace-jump-done will clean the query char, so we need to save it
+        (let ((query-char ace-jump-query-char))
+          (ace-jump-done)
+          ;; restore the flag
+          (ace-jump-char-mode query-char))))
+   ((eq ace-jump-current-mode 'ace-jump-line-mode)
+    nil)
+   (t
+    nil)))
+
+
+
+
+;;;###autoload
+(defun ace-jump-char-mode (query-char)
+  "AceJump char mode"
+  (interactive (list (read-char "Query Char:")))
+
+  ;; We should prevent recursion call this function.  This can happen
+  ;; when you trigger the key for ace jump again when already in ace
+  ;; jump mode.  So we stop the previous one first.
+  (if ace-jump-current-mode (ace-jump-done))
+  
+  (if (eq (ace-jump-char-category query-char) 'other)
+    (error "[AceJump] Non-printable character"))
+
+  ;; others : digit , alpha, punc
+  (setq ace-jump-query-char query-char)
+  (setq ace-jump-current-mode 'ace-jump-char-mode)
+  (ace-jump-do (regexp-quote (make-string 1 query-char))))
+
+
+;;;###autoload
+(defun ace-jump-word-mode (head-char)
+  "AceJump word mode.
+You can set `ace-jump-word-mode-use-query-char' to nil to prevent
+asking for a head char, that will mark all the word in current
+buffer."
+  (interactive (list (if ace-jump-word-mode-use-query-char
+                         (read-char "Head Char:")
+                       nil)))
+
+  ;; We should prevent recursion call this function.  This can happen
+  ;; when you trigger the key for ace jump again when already in ace
+  ;; jump mode.  So we stop the previous one first.
+  (if ace-jump-current-mode (ace-jump-done))
+
+  (cond
+   ((null head-char)
+    ;; \<  - start of word
+    ;; \sw - word constituent
+    (ace-jump-do "\\<\\sw"))
+   ((memq (ace-jump-char-category head-char)
+          '(digit alpha))
+    (setq ace-jump-query-char head-char)
+    (setq ace-jump-current-mode 'ace-jump-word-mode)
+    (ace-jump-do (concat "\\<" (make-string 1 head-char))))
+   ((eq (ace-jump-char-category head-char)
+        'punc)
+    ;; we do not query punctuation under word mode
+    (if (null ace-jump-mode-detect-punc)
+        (error "[AceJump] Not a valid word constituent"))
+    ;; we will use char mode to continue search
+    (setq ace-jump-query-char head-char)
+    (setq ace-jump-current-mode 'ace-jump-char-mode)
+    (ace-jump-do (regexp-quote (make-string 1 head-char))))
+   (t
+    (error "[AceJump] Non-printable character"))))
+
+
+;;;###autoload
+(defun ace-jump-line-mode ()
+  "AceJump line mode.
+Marked each no empty line and move there"
+  (interactive)
+
+  ;; We should prevent recursion call this function.  This can happen
+  ;; when you trigger the key for ace jump again when already in ace
+  ;; jump mode.  So we stop the previous one first.
+  (if ace-jump-current-mode (ace-jump-done))
+  
+  (setq ace-jump-current-mode 'ace-jump-line-mode)
+  (ace-jump-do "^"))
+
+;;;###autoload
+(defun ace-jump-mode(&optional prefix)
+  "AceJump mode is a minor mode for you to quick jump to a
+position in the curret view.
+   There is three submode now:
+     `ace-jump-char-mode'
+     `ace-jump-word-mode'
+     `ace-jump-line-mode'
+
+You can specify the sequence about which mode should enter
+by customize `ace-jump-mode-submode-list'.
+
+If you do not want to query char for word mode, you can change
+`ace-jump-word-mode-use-query-char' to nil.
+
+If you don't like the default move keys, you can change it by
+setting `ace-jump-mode-move-keys'.
+
+You can constrol whether use the case sensitive via
+`ace-jump-mode-case-fold'.
+"
+  (interactive "p")
+  (let ((index (/ prefix 4))
+        (submode-list-length (length ace-jump-mode-submode-list)))
+    (if (< index 0)
+        (error "[AceJump] Invalid prefix command"))
+    (if (>= index submode-list-length)
+        (setq index (1- submode-list-length)))
+    (call-interactively (nth index ace-jump-mode-submode-list))))
+
+(defun ace-jump-move ()
+  "move cursor based on user input"
+  (interactive)
+  (let* ((index (let ((ret (position (aref (this-command-keys) 0)
+                                     ace-jump-mode-move-keys)))
+                  (if ret ret (length ace-jump-mode-move-keys))))
+         (node (nth index (cdr ace-jump-search-tree))))
+    (cond
+     ;; we do not find key in search tree. This can happen, for
+     ;; example, when there is only three selections in screen
+     ;; (totally five move-keys), but user press the forth move key
+     ((null node)
+      (message "No such position candidate.")
+      (ace-jump-done))
+     ;; this is a branch node, which means there need further
+     ;; selection
+     ((eq (car node) 'branch)
+      (let ((old-tree ace-jump-search-tree))
+        ;; we use sub tree in next move, create a new root node
+        ;; whose child is the sub tree nodes
+        (setq ace-jump-search-tree (cons 'branch (cdr node)))
+        (ace-jump-update-overlay-in-search-tree ace-jump-search-tree
+                                                ace-jump-mode-move-keys)
+
+        ;; this is important, we need remove the subtree first before
+        ;; do delete, we set the child nodes to nil
+        (setf (cdr node) nil)
+        (ace-jump-delete-overlay-in-search-tree old-tree)))
+     ;; if the node is leaf node, this is the final one
+     ((eq (car node) 'leaf)
+      ;; need to save aj data, as `ace-jump-done' will clean it
+      (let ((aj-data (overlay-get (cdr node) 'aj-data)))
+        (ace-jump-push-mark)
+        (run-hooks 'ace-jump-mode-before-jump-hook)
+        (ace-jump-jump-to aj-data))
+        (ace-jump-done)
+      (run-hooks 'ace-jump-mode-end-hook))
+     (t
+      (ace-jump-done)
+      (error "[AceJump] Internal error: tree node type is invalid")))))
+
+
+
+(defun ace-jump-done()
+  "stop AceJump motion"
+  (interactive)
+  ;; clear the status flag
+  (setq ace-jump-query-char nil)
+  (setq ace-jump-current-mode nil)
+
+  ;; clean the status line
+  (setq ace-jump-mode nil)
+  (force-mode-line-update)
+
+  ;; delete background overlay
+  (loop for ol in ace-jump-background-overlay-list
+        do (delete-overlay ol))
+  (setq ace-jump-background-overlay-list nil)
+
+
+  ;; delete overlays in search tree
+  (ace-jump-delete-overlay-in-search-tree ace-jump-search-tree)
+  (setq ace-jump-search-tree nil)
+
+  (setq overriding-local-map nil)
+
+  (remove-hook 'mouse-leave-buffer-hook 'ace-jump-done)
+  (remove-hook 'kbd-macro-termination-hook 'ace-jump-done))
+
+(defun ace-jump-kill-buffer(buffer)
+  "Utility function to kill buffer for ace jump mode.
+We also need to handle the buffer which has clients on it"
+  (if (and (boundp 'server-buffer-clients)
+           server-buffer-clients)
+      (server-buffer-done buffer t))
+  (kill-buffer buffer))
+
+;;;; ============================================
+;;;; advice to sync emacs mark ring
+;;;; ============================================
+
+(defun ace-jump-move-to-end-if ( l pred )
+  "Move all the element in a list to the end of list if it make
+the PRED to return non-nil.
+
+PRED is a function object which can pass to funcall and accept
+one argument, which will be every element in the list.
+Such as : (lambda (x) (equal x 1)) "
+  (let (true-list false-list)
+    (loop for e in l
+          do (if (funcall pred e)
+                 (setq true-list (cons e true-list))
+               (setq false-list (cons e false-list))))
+    (nconc (nreverse false-list)
+           (and true-list (nreverse true-list)))))
+
+(defun ace-jump-move-first-to-end-if (l pred)
+  "Only move the first found one to the end of list"
+  (lexical-let ((pred pred)
+                found)
+    (ace-jump-move-to-end-if l
+                             (lambda (x)
+                               (if found
+                                   nil
+                                 (setq found (funcall pred x)))))))
+
+  
+
+(defadvice pop-mark (before ace-jump-pop-mark-advice)
+  "When `pop-mark' is called to jump back, this advice will sync the mark ring.
+Move the same position to the end of `ace-jump-mode-mark-ring'."
+  (lexical-let ((mp (mark t))
+                (cb (current-buffer)))
+    (if mp
+        (setq ace-jump-mode-mark-ring
+              (ace-jump-move-first-to-end-if ace-jump-mode-mark-ring
+                                             (lambda (x)
+                                               (and (equal (aj-position-offset x) mp)
+                                                    (eq (aj-position-buffer x) cb))))))))
+            
+
+(defadvice pop-global-mark (before ace-jump-pop-global-mark-advice)
+  "When `pop-global-mark' is called to jump back, this advice will sync the mark ring.
+Move the aj-position with the same buffer to the end of `ace-jump-mode-mark-ring'."
+  (interactive)
+  ;; find the one that will be jump to
+  (let ((index global-mark-ring))
+    ;; refer to the implementation of `pop-global-mark'
+    (while (and index (not (marker-buffer (car index))))
+      (setq index (cdr index)))
+    (if index
+        ;; find the mark
+        (lexical-let ((mb (marker-buffer (car index))))
+          (setq ace-jump-mode-mark-ring
+                (ace-jump-move-to-end-if ace-jump-mode-mark-ring
+                                         (lambda (x)
+                                           (eq (aj-position-buffer x) mb))))))))
+                                              
+
+(defun ace-jump-mode-enable-mark-sync ()
+  "Enable the sync funciton between ace jump mode mark ring and emacs mark ring.
+
+1. This function will enable the advice which activate on
+`pop-mark' and `pop-global-mark'. These advice will remove the
+same marker from `ace-jump-mode-mark-ring' when user use
+`pop-mark' or `global-pop-mark' to jump back. 
+
+2. Set variable `ace-jump-sync-emacs-mark-ring' to t, which will
+sync mark information with emacs mark ring. "
+  (ad-enable-advice 'pop-mark 'before 'ace-jump-pop-mark-advice)
+  (ad-activate 'pop-mark)
+  (ad-enable-advice 'pop-global-mark 'before 'ace-jump-pop-global-mark-advice)
+  (ad-activate 'pop-global-mark)
+  (setq ace-jump-sync-emacs-mark-ring t))
+
+(defun ace-jump-mode-disable-mark-sync ()
+  "Disable the sync funciton between ace jump mode mark ring and emacs mark ring.
+
+1. This function will diable the advice which activate on
+`pop-mark' and `pop-global-mark'. These advice will remove the
+same marker from `ace-jump-mode-mark-ring' when user use
+`pop-mark' or `global-pop-mark' to jump back. 
+
+2. Set variable `ace-jump-sync-emacs-mark-ring' to nil, which
+will stop synchronizing mark information with emacs mark ring. "
+  (ad-disable-advice 'pop-mark 'before 'ace-jump-pop-mark-advice)
+  (ad-activate 'pop-mark)
+  (ad-disable-advice 'pop-global-mark 'before 'ace-jump-pop-global-mark-advice)
+  (ad-activate 'pop-global-mark)
+  (setq ace-jump-sync-emacs-mark-ring nil))
+
+
+(provide 'ace-jump-mode)
+
+;;; ace-jump-mode.el ends here
+
+;; Local Variables: 
+;; byte-compile-warnings: (not cl-functions) 
+;; End: 
+