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+;;; evil-states.el --- States
+
+;; Author: Vegard Øye <vegard_oye at hotmail.com>
+;; Maintainer: Vegard Øye <vegard_oye at hotmail.com>
+
+;; Version: 1.2.13
+
+;;
+;; This file is NOT part of GNU Emacs.
+
+;;; License:
+
+;; This file is part of Evil.
+;;
+;; Evil 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.
+;;
+;; Evil 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 Evil.  If not, see <http://www.gnu.org/licenses/>.
+
+(require 'evil-core)
+
+;;; Code:
+
+;;; Normal state
+
+(evil-define-state normal
+  "Normal state.
+AKA \"Command\" state."
+  :tag " <N> "
+  :enable (motion)
+  :exit-hook (evil-repeat-start-hook)
+  (cond
+   ((evil-normal-state-p)
+    (overwrite-mode -1)
+    (add-hook 'post-command-hook #'evil-normal-post-command nil t))
+   (t
+    (remove-hook 'post-command-hook #'evil-normal-post-command t))))
+
+(defun evil-normal-post-command (&optional command)
+  "Reset command loop variables in Normal state.
+Also prevent point from reaching the end of the line.
+If the region is activated, enter Visual state."
+  (unless (or (evil-initializing-p)
+              (null this-command))
+    (setq command (or command this-command))
+    (when (evil-normal-state-p)
+      (setq evil-this-type nil
+            evil-this-operator nil
+            evil-this-motion nil
+            evil-this-motion-count nil
+            evil-inhibit-operator nil
+            evil-inhibit-operator-value nil)
+      (unless (memq command '(evil-use-register
+                              digit-argument
+                              negative-argument
+                              universal-argument
+                              universal-argument-minus
+                              universal-argument-more
+                              universal-argument-other-key))
+        (setq evil-this-register nil))
+      (evil-adjust-cursor))))
+(put 'evil-normal-post-command 'permanent-local-hook t)
+
+;;; Insert state
+
+(defun evil-maybe-remove-spaces (&optional do-remove)
+  "Remove space from newly opened empty line.
+This function removes (indentation) spaces that have been
+inserted by opening a new empty line. The behavior depends on the
+variable `evil-maybe-remove-spaces'. If this variable is nil the
+function does nothing. Otherwise the behavior depends on
+DO-REMOVE.  If DO-REMOVE is non-nil the spaces are
+removed. Otherwise `evil-maybe-remove-spaces' is set to nil
+unless the last command opened yet another new line.
+
+This function should be added as a post-command-hook to track
+commands opening a new line."
+  (cond
+   ((not evil-maybe-remove-spaces)
+    (remove-hook 'post-command-hook #'evil-maybe-remove-spaces))
+   (do-remove
+    (when (save-excursion
+            (beginning-of-line)
+            (looking-at "^\\s-*$"))
+      (delete-region (line-beginning-position)
+                     (line-end-position)))
+    (setq evil-maybe-remove-spaces nil)
+    (remove-hook 'post-command-hook #'evil-maybe-remove-spaces))
+   ((not (memq this-command
+               '(evil-open-above
+                 evil-open-below
+                 evil-append
+                 evil-append-line
+                 newline
+                 newline-and-indent
+                 indent-and-newline)))
+    (setq evil-maybe-remove-spaces nil)
+    (remove-hook 'post-command-hook #'evil-maybe-remove-spaces))))
+
+(evil-define-state insert
+  "Insert state."
+  :tag " <I> "
+  :cursor (bar . 2)
+  :message "-- INSERT --"
+  :entry-hook (evil-start-track-last-insertion)
+  :exit-hook (evil-cleanup-insert-state evil-stop-track-last-insertion)
+  :input-method t
+  (cond
+   ((evil-insert-state-p)
+    (add-hook 'post-command-hook #'evil-maybe-remove-spaces)
+    (add-hook 'pre-command-hook #'evil-insert-repeat-hook)
+    (setq evil-maybe-remove-spaces t)
+    (unless (eq evil-want-fine-undo t)
+      (evil-start-undo-step)))
+   (t
+    (remove-hook 'post-command-hook #'evil-maybe-remove-spaces)
+    (remove-hook 'pre-command-hook #'evil-insert-repeat-hook)
+    (evil-maybe-remove-spaces t)
+    (setq evil-insert-repeat-info evil-repeat-info)
+    (evil-set-marker ?^ nil t)
+    (unless (eq evil-want-fine-undo t)
+      (evil-end-undo-step))
+    (when evil-move-cursor-back
+      (when (or (evil-normal-state-p evil-next-state)
+                (evil-motion-state-p evil-next-state))
+        (evil-move-cursor-back))))))
+
+(defun evil-insert-repeat-hook ()
+  "Record insertion keys in `evil-insert-repeat-info'."
+  (setq evil-insert-repeat-info (last evil-repeat-info))
+  (remove-hook 'pre-command-hook #'evil-insert-repeat-hook))
+(put 'evil-insert-repeat-hook 'permanent-local-hook t)
+
+(defun evil-cleanup-insert-state ()
+  "Called when Insert state is about to be exited.
+Handles the repeat-count of the insertion command."
+  (when evil-insert-count
+    (dotimes (i (1- evil-insert-count))
+      (when evil-insert-lines
+        (evil-insert-newline-below)
+        (when evil-auto-indent
+          (indent-according-to-mode)))
+      (when (fboundp 'evil-execute-repeat-info)
+        (evil-execute-repeat-info
+         (cdr evil-insert-repeat-info)))))
+  (when evil-insert-vcount
+    (let ((buffer-invisibility-spec buffer-invisibility-spec))
+      ;; make all lines hidden by hideshow temporarily visible
+      (when (listp buffer-invisibility-spec)
+        (setq buffer-invisibility-spec
+              (evil-filter-list
+               #'(lambda (x)
+                   (or (eq x 'hs)
+                       (eq (car-safe x) 'hs)))
+               buffer-invisibility-spec)))
+      (let ((line (nth 0 evil-insert-vcount))
+            (col (nth 1 evil-insert-vcount))
+            (vcount (nth 2 evil-insert-vcount)))
+        (save-excursion
+          (dotimes (v (1- vcount))
+            (goto-char (point-min))
+            (forward-line (+ line v))
+            (when (or (not evil-insert-skip-empty-lines)
+                      (not (integerp col))
+                      (save-excursion
+                        (evil-move-end-of-line)
+                        (>= (current-column) col)))
+              (if (integerp col)
+                  (move-to-column col t)
+                (funcall col))
+              (dotimes (i (or evil-insert-count 1))
+                (when (fboundp 'evil-execute-repeat-info)
+                  (evil-execute-repeat-info
+                   (cdr evil-insert-repeat-info)))))))))))
+
+;;; Visual state
+
+;; Visual selections are implemented in terms of types, and are
+;; compatible with the Emacs region. This is achieved by "translating"
+;; the region to the selected text right before a command is executed.
+;; If the command is a motion, the translation is postponed until a
+;; non-motion command is invoked (distinguished by the :keep-visual
+;; command property).
+;;
+;; Visual state activates the region, enabling Transient Mark mode if
+;; not already enabled. This is only temporay: if Transient Mark mode
+;; was disabled before entering Visual state, it is disabled when
+;; exiting Visual state. This allows Visual state to harness the
+;; "transient" behavior of many commands without overriding the user's
+;; preferences in other states.
+
+(defmacro evil-define-visual-selection (selection doc &rest body)
+  "Define a Visual selection SELECTION.
+Creates a command evil-visual-SELECTION for enabling the selection.
+DOC is the function's documentation string. The following keywords
+may be specified in BODY:
+
+:message STRING         Status message when enabling the selection.
+:type TYPE              Type to use (defaults to SELECTION).
+
+Following the keywords is optional code which is executed each time
+the selection is enabled.
+
+\(fn SELECTION DOC [[KEY VAL]...] BODY...)"
+  (declare (indent defun)
+           (debug (&define name stringp
+                           [&rest keywordp sexp]
+                           def-body)))
+  (let* ((name (intern (format "evil-visual-%s" selection)))
+         (message (intern (format "%s-message" name)))
+         (type selection)
+         arg key string)
+    ;; collect keywords
+    (while (keywordp (car-safe body))
+      (setq key (pop body)
+            arg (pop body))
+      (cond
+       ((eq key :message)
+        (setq string arg))
+       ((eq key :type)
+        (setq type arg))))
+    ;; macro expansion
+    `(progn
+       (add-to-list 'evil-visual-alist (cons ',selection ',name))
+       (defvar ,name ',type ,(format "*%s" doc))
+       (defvar ,message ,string ,doc)
+       (evil-define-command ,name (&optional mark point type message)
+         ,@(when doc `(,doc))
+         :keep-visual t
+         :repeat nil
+         (interactive
+          (list nil nil
+                (if (and (evil-visual-state-p)
+                         (eq evil-visual-selection ',selection))
+                    'exit ,name) t))
+         (if (eq type 'exit)
+             (evil-exit-visual-state)
+           (setq type (or type ,name)
+                 evil-visual-selection ',selection)
+           (evil-visual-make-region mark point type message)
+           ,@body))
+       ',selection)))
+
+(evil-define-visual-selection char
+  "Characterwise selection."
+  :type inclusive
+  :message "-- VISUAL --")
+
+(evil-define-visual-selection line
+  "Linewise selection."
+  :message "-- VISUAL LINE --")
+
+(evil-define-visual-selection block
+  "Blockwise selection."
+  :message "-- VISUAL BLOCK --"
+  (evil-transient-mark -1)
+  ;; refresh the :corner property
+  (setq evil-visual-properties
+        (plist-put evil-visual-properties :corner
+                   (evil-visual-block-corner 'upper-left))))
+
+(evil-define-state visual
+  "Visual state."
+  :tag " <V> "
+  :enable (motion normal)
+  :message 'evil-visual-message
+  (cond
+   ((evil-visual-state-p)
+    (evil-save-transient-mark-mode)
+    (setq select-active-regions nil)
+    (cond
+     ((region-active-p)
+      (if (< (evil-visual-direction) 0)
+          (evil-visual-select (region-beginning) (region-end)
+                              evil-visual-char
+                              (evil-visual-direction))
+        (evil-visual-make-selection (mark t) (point)
+                                    evil-visual-char))
+      (evil-visual-highlight))
+     (t
+      (evil-visual-make-region (point) (point) evil-visual-char)))
+    (add-hook 'pre-command-hook #'evil-visual-pre-command nil t)
+    (add-hook 'post-command-hook #'evil-visual-post-command nil t)
+    (add-hook 'deactivate-mark-hook #'evil-visual-deactivate-hook nil t))
+   (t
+    ;; Postpone deactivation of region if next state is Insert.
+    ;; This gives certain insertion commands (auto-pairing characters,
+    ;; for example) an opportunity to access the region.
+    (if (and (eq evil-next-state 'insert)
+             (eq evil-visual-selection 'char))
+        (add-hook 'evil-normal-state-entry-hook
+                  #'evil-visual-deactivate-hook nil t)
+      (evil-visual-deactivate-hook))
+    (setq evil-visual-region-expanded nil)
+    (remove-hook 'pre-command-hook #'evil-visual-pre-command t)
+    (remove-hook 'post-command-hook #'evil-visual-post-command t)
+    (remove-hook 'deactivate-mark-hook #'evil-visual-deactivate-hook t)
+    (evil-visual-highlight -1))))
+
+(defun evil-visual-pre-command (&optional command)
+  "Run before each COMMAND in Visual state.
+Expand the region to the selection unless COMMAND is a motion."
+  (when (evil-visual-state-p)
+    (setq command (or command this-command))
+    (when evil-visual-x-select-timer
+      (cancel-timer evil-visual-x-select-timer))
+    (unless (evil-get-command-property command :keep-visual)
+      (evil-visual-update-x-selection)
+      (evil-visual-expand-region
+       ;; exclude final newline from linewise selection
+       ;; unless the command has real need of it
+       (and (eq (evil-visual-type) 'line)
+            (evil-get-command-property command :exclude-newline))))))
+
+(put 'evil-visual-pre-command 'permanent-local-hook t)
+
+(defun evil-visual-post-command (&optional command)
+  "Run after each COMMAND in Visual state.
+If COMMAND is a motion, refresh the selection;
+otherwise exit Visual state."
+  (when (evil-visual-state-p)
+    (setq command (or command this-command))
+    (if (or quit-flag
+            (eq command #'keyboard-quit)
+            ;; Is `mark-active' nil for an unexpanded region?
+            deactivate-mark
+            (and (not evil-visual-region-expanded)
+                 (not (region-active-p))
+                 (not (eq evil-visual-selection 'block))))
+        (progn
+          (evil-exit-visual-state)
+          (evil-adjust-cursor))
+      (if evil-visual-region-expanded
+          (evil-visual-contract-region)
+        (evil-visual-refresh))
+      (setq evil-visual-x-select-timer
+            (run-with-idle-timer evil-visual-x-select-timeout nil
+                                 #'evil-visual-update-x-selection
+                                 (current-buffer)))
+      (evil-visual-highlight))))
+(put 'evil-visual-post-command 'permanent-local-hook t)
+
+(defun evil-visual-update-x-selection (&optional buffer)
+  "Update the X selection with the current visual region."
+  (let ((buf (or buffer (current-buffer))))
+    (when (buffer-live-p buf)
+      (with-current-buffer buf
+        (when (and (evil-visual-state-p)
+                   (display-selections-p)
+                   (not (eq evil-visual-selection 'block)))
+          (evil-set-selection 'PRIMARY (buffer-substring-no-properties
+                                        evil-visual-beginning
+                                        evil-visual-end)))))))
+
+(defun evil-visual-activate-hook (&optional command)
+  "Enable Visual state if the region is activated."
+  (unless (evil-visual-state-p)
+    (evil-delay nil
+        ;; the activation may only be momentary, so re-check
+        ;; in `post-command-hook' before entering Visual state
+        '(unless (or (evil-visual-state-p)
+                     (evil-insert-state-p)
+                     (evil-emacs-state-p))
+           (when (and (region-active-p)
+                      (not deactivate-mark))
+             (evil-visual-state)))
+      'post-command-hook nil t
+      "evil-activate-visual-state")))
+(put 'evil-visual-activate-hook 'permanent-local-hook t)
+
+(defun evil-visual-deactivate-hook (&optional command)
+  "Deactivate the region and restore Transient Mark mode."
+  (setq command (or command this-command))
+  (remove-hook 'deactivate-mark-hook
+               #'evil-visual-deactivate-hook t)
+  (remove-hook 'evil-normal-state-entry-hook
+               #'evil-visual-deactivate-hook t)
+  (cond
+   ((and (evil-visual-state-p) command
+         (not (evil-get-command-property command :keep-visual)))
+    (setq evil-visual-region-expanded nil)
+    (evil-exit-visual-state))
+   ((not (evil-visual-state-p))
+    (evil-active-region -1)
+    (evil-restore-transient-mark-mode))))
+(put 'evil-visual-deactivate-hook 'permanent-local-hook t)
+
+(evil-define-command evil-exit-visual-state (&optional later buffer)
+  "Exit from Visual state to the previous state.
+If LATER is non-nil, exit after the current command."
+  :keep-visual t
+  :repeat abort
+  (with-current-buffer (or buffer (current-buffer))
+    (when (evil-visual-state-p)
+      (if later
+          (setq deactivate-mark t)
+        (when evil-visual-region-expanded
+          (evil-visual-contract-region))
+        (evil-change-to-previous-state)))))
+
+(defun evil-visual-message (&optional selection)
+  "Create an echo area message for SELECTION.
+SELECTION is a kind of selection as defined by
+`evil-define-visual-selection', such as `char', `line'
+or `block'."
+  (let (message)
+    (setq selection (or selection evil-visual-selection))
+    (when selection
+      (setq message
+            (symbol-value (intern (format "evil-visual-%s-message"
+                                          selection))))
+      (cond
+       ((functionp message)
+        (funcall message))
+       ((stringp message)
+        (evil-echo "%s" message))))))
+
+(defun evil-visual-select (beg end &optional type dir message)
+  "Create a Visual selection of type TYPE from BEG to END.
+Point and mark are positioned so that the resulting selection
+has the specified boundaries. If DIR is negative, point precedes mark,
+otherwise it succedes it. To specify point and mark directly,
+use `evil-visual-make-selection'."
+  (let* ((range (evil-contract beg end type))
+         (mark (evil-range-beginning range))
+         (point (evil-range-end range))
+         (dir (or dir 1)))
+    (when (< dir 0)
+      (evil-swap mark point))
+    (evil-visual-make-selection mark point type message)))
+
+(defun evil-visual-make-selection (mark point &optional type message)
+  "Create a Visual selection with point at POINT and mark at MARK.
+The boundaries of the selection are inferred from these
+and the current TYPE. To specify the boundaries and infer
+mark and point, use `evil-visual-select' instead."
+  (let* ((selection (evil-visual-selection-for-type type))
+         (func (evil-visual-selection-function selection))
+         (prev (and (evil-visual-state-p) evil-visual-selection))
+         (mark (evil-normalize-position mark))
+         (point (evil-normalize-position point))
+         (state evil-state))
+    (unless (evil-visual-state-p)
+      (evil-visual-state))
+    (setq evil-visual-selection selection)
+    (funcall func mark point type
+             ;; signal a message when changing the selection
+             (when (or (not (evil-visual-state-p state))
+                       (not (eq selection prev)))
+               message))))
+
+(defun evil-visual-make-region (mark point &optional type message)
+  "Create an active region from MARK to POINT.
+If TYPE is given, also set the Visual type.
+If MESSAGE is given, display it in the echo area."
+  (interactive)
+  (let* ((point (evil-normalize-position
+                 (or point (point))))
+         (mark (evil-normalize-position
+                (or mark
+                    (when (or (evil-visual-state-p)
+                              (region-active-p))
+                      (mark t))
+                    point))))
+    (unless (evil-visual-state-p)
+      (evil-visual-state))
+    (evil-active-region 1)
+    (setq evil-visual-region-expanded nil)
+    (evil-visual-refresh mark point type)
+    (cond
+     ((null evil-echo-state))
+     ((stringp message)
+      (evil-echo "%s" message))
+     (message
+      (cond
+       ((stringp evil-visual-state-message)
+        (evil-echo "%s" evil-visual-state-message))
+       ((functionp evil-visual-state-message)
+        (funcall evil-visual-state-message)))))))
+
+(defun evil-visual-expand-region (&optional exclude-newline)
+  "Expand the region to the Visual selection.
+If EXCLUDE-NEWLINE is non-nil and the selection ends with a newline,
+exclude that newline from the region."
+  (when (and (evil-visual-state-p)
+             (not evil-visual-region-expanded))
+    (let ((mark evil-visual-beginning)
+          (point evil-visual-end))
+      (when (< evil-visual-direction 0)
+        (evil-swap mark point))
+      (setq evil-visual-region-expanded t)
+      (evil-visual-refresh mark point)
+      (when (and exclude-newline
+                 (save-excursion
+                   (goto-char evil-visual-end)
+                   (and (bolp) (not (bobp)))))
+        (if (< evil-visual-direction 0)
+            (evil-move-mark (max point (1- (mark))))
+          (goto-char (max mark (1- (point)))))))))
+
+(defun evil-visual-contract-region ()
+  "The inverse of `evil-visual-expand-region'.
+Create a Visual selection that expands to the current region."
+  (evil-visual-refresh)
+  (setq evil-visual-region-expanded nil)
+  (evil-visual-refresh evil-visual-mark evil-visual-point))
+
+(defun evil-visual-refresh (&optional mark point type &rest properties)
+  "Refresh point, mark and Visual variables.
+Refreshes `evil-visual-beginning', `evil-visual-end',
+`evil-visual-mark', `evil-visual-point', `evil-visual-selection',
+`evil-visual-direction', `evil-visual-properties' and `evil-this-type'."
+  (let* ((point (or point (point)))
+         (mark (or mark (mark t) point))
+         (dir (evil-visual-direction))
+         (type (or type (evil-visual-type evil-visual-selection)
+                   (evil-visual-type)))
+         range)
+    (evil-move-mark mark)
+    (goto-char point)
+    (setq evil-visual-beginning
+          (or evil-visual-beginning
+              (let ((marker (make-marker)))
+                (move-marker marker (min point mark))))
+          evil-visual-end
+          (or evil-visual-end
+              (let ((marker (make-marker)))
+                (set-marker-insertion-type marker t)
+                (move-marker marker (max point mark))))
+          evil-visual-mark
+          (or evil-visual-mark
+              (let ((marker (make-marker)))
+                (move-marker marker mark)))
+          evil-visual-point
+          (or evil-visual-point
+              (let ((marker (make-marker)))
+                (move-marker marker point))))
+    (setq evil-visual-properties
+          (evil-concat-plists evil-visual-properties properties))
+    (cond
+     (evil-visual-region-expanded
+      (setq type (or (evil-visual-type) type))
+      (move-marker evil-visual-beginning (min point mark))
+      (move-marker evil-visual-end (max point mark))
+      ;; if the type is one-to-one, we can safely refresh
+      ;; the unexpanded positions as well
+      (when (evil-type-property type :one-to-one)
+        (setq range (apply #'evil-contract point mark type
+                           evil-visual-properties)
+              mark (evil-range-beginning range)
+              point (evil-range-end range))
+        (when (< dir 0)
+          (evil-swap mark point))
+        (move-marker evil-visual-mark mark)
+        (move-marker evil-visual-point point)))
+     (t
+      (setq range (apply #'evil-expand point mark type
+                         evil-visual-properties)
+            type (evil-type range type))
+      (move-marker evil-visual-beginning (evil-range-beginning range))
+      (move-marker evil-visual-end (evil-range-end range))
+      (move-marker evil-visual-mark mark)
+      (move-marker evil-visual-point point)))
+    (setq evil-visual-direction dir
+          evil-this-type type)))
+
+(defun evil-visual-highlight (&optional arg)
+  "Highlight Visual selection, depending on the Visual type.
+With negative ARG, disable highlighting."
+  (cond
+   ((and (numberp arg) (< arg 1))
+    (when evil-visual-overlay
+      (delete-overlay evil-visual-overlay)
+      (setq evil-visual-overlay nil))
+    (when evil-visual-block-overlays
+      (mapc #'delete-overlay evil-visual-block-overlays)
+      (setq evil-visual-block-overlays nil)))
+   ((eq evil-visual-selection 'block)
+    (when evil-visual-overlay
+      (evil-visual-highlight -1))
+    (evil-visual-highlight-block
+     evil-visual-beginning
+     evil-visual-end))
+   (t
+    (when evil-visual-block-overlays
+      (evil-visual-highlight -1))
+    (if evil-visual-overlay
+        (move-overlay evil-visual-overlay
+                      evil-visual-beginning evil-visual-end)
+      (setq evil-visual-overlay
+            (make-overlay evil-visual-beginning evil-visual-end)))
+    (overlay-put evil-visual-overlay 'face 'region)
+    (overlay-put evil-visual-overlay 'priority 99))))
+
+(defun evil-visual-highlight-block (beg end &optional overlays)
+  "Highlight rectangular region from BEG to END.
+Do this by putting an overlay on each line within the rectangle.
+Each overlay extends across all the columns of the rectangle.
+Reuse overlays where possible to prevent flicker."
+  (let* ((point (point))
+         (mark (or (mark t) point))
+         (overlays (or overlays 'evil-visual-block-overlays))
+         (old (symbol-value overlays))
+         (eol-col (and (memq this-command '(next-line previous-line))
+                       (numberp temporary-goal-column)
+                       (1+ (min (round temporary-goal-column)
+                                (1- most-positive-fixnum)))))
+         beg-col end-col new nlines overlay window-beg window-end)
+    (save-excursion
+      ;; calculate the rectangular region represented by BEG and END,
+      ;; but put BEG in the upper-left corner and END in the
+      ;; lower-right if not already there
+      (setq beg-col (evil-column beg)
+            end-col (evil-column end))
+      (when (>= beg-col end-col)
+        (if (= beg-col end-col)
+            (setq end-col (1+ end-col))
+          (evil-sort beg-col end-col))
+        (setq beg (save-excursion
+                    (goto-char beg)
+                    (evil-move-to-column beg-col))
+              end (save-excursion
+                    (goto-char end)
+                    (evil-move-to-column end-col 1))))
+      ;; update end column with eol-col (extension to eol).
+      (when (and eol-col (> eol-col end-col))
+        (setq end-col eol-col))
+      ;; force a redisplay so we can do reliable window
+      ;; BEG/END calculations
+      (sit-for 0)
+      (setq window-beg (max (window-start) beg)
+            window-end (min (window-end) (1+ end))
+            nlines (count-lines window-beg
+                                (min window-end (point-max))))
+      ;; iterate over those lines of the rectangle which are
+      ;; visible in the currently selected window
+      (goto-char window-beg)
+      (dotimes (i nlines)
+        (let (before after row-beg row-end)
+          ;; beginning of row
+          (evil-move-to-column beg-col)
+          (when (< (current-column) beg-col)
+            ;; prepend overlay with virtual spaces if unable to
+            ;; move directly to the first column
+            (setq before
+                  (propertize
+                   (make-string
+                    (- beg-col (current-column)) ?\s)
+                   'face
+                   (or (get-text-property (1- (point)) 'face)
+                       'default))))
+          (setq row-beg (point))
+          ;; end of row
+          (evil-move-to-column end-col)
+          (when (and (not (eolp))
+                     (< (current-column) end-col))
+            ;; append overlay with virtual spaces if unable to
+            ;; move directly to the last column
+            (setq after
+                  (propertize
+                   (make-string
+                    (if (= (point) row-beg)
+                        (- end-col beg-col)
+                      (- end-col (current-column)))
+                    ?\s) 'face 'region))
+            ;; place cursor on one of the virtual spaces
+            (if (= point row-beg)
+                (put-text-property
+                 0 (min (length after) 1)
+                 'cursor t after)
+              (put-text-property
+               (max 0 (1- (length after))) (length after)
+               'cursor t after)))
+          (setq row-end (min (point) (line-end-position)))
+          ;; trim old leading overlays
+          (while (and old
+                      (setq overlay (car old))
+                      (< (overlay-start overlay) row-beg)
+                      (/= (overlay-end overlay) row-end))
+            (delete-overlay overlay)
+            (setq old (cdr old)))
+          ;; reuse an overlay if possible, otherwise create one
+          (cond
+           ((and old (setq overlay (car old))
+                 (or (= (overlay-start overlay) row-beg)
+                     (= (overlay-end overlay) row-end)))
+            (move-overlay overlay row-beg row-end)
+            (overlay-put overlay 'before-string before)
+            (overlay-put overlay 'after-string after)
+            (setq new (cons overlay new)
+                  old (cdr old)))
+           (t
+            (setq overlay (make-overlay row-beg row-end))
+            (overlay-put overlay 'before-string before)
+            (overlay-put overlay 'after-string after)
+            (setq new (cons overlay new)))))
+        (forward-line 1))
+      ;; display overlays
+      (dolist (overlay new)
+        (overlay-put overlay 'face 'region)
+        (overlay-put overlay 'priority 99))
+      ;; trim old overlays
+      (dolist (overlay old)
+        (delete-overlay overlay))
+      (set overlays (nreverse new)))))
+
+(defun evil-visual-range ()
+  "Return the Visual selection as a range.
+This is a list (BEG END TYPE PROPERTIES...), where BEG is the
+beginning of the selection, END is the end of the selection,
+TYPE is the selection's type, and PROPERTIES is a property list
+of miscellaneous selection attributes."
+  (apply #'evil-range
+         evil-visual-beginning evil-visual-end
+         (evil-visual-type)
+         :expanded t
+         evil-visual-properties))
+
+(defun evil-visual-direction ()
+  "Return direction of Visual selection.
+The direction is -1 if point precedes mark and 1 otherwise.
+See also the variable `evil-visual-direction', which holds
+the direction of the last selection."
+  (let* ((point (point))
+         (mark (or (mark t) point)))
+    (if (< point mark) -1 1)))
+
+(defun evil-visual-type (&optional selection)
+  "Return the type of the Visual selection.
+If SELECTION is specified, return the type of that instead."
+  (if (and (null selection) (evil-visual-state-p))
+      (or evil-this-type (evil-visual-type evil-visual-selection))
+    (setq selection (or selection evil-visual-selection))
+    (symbol-value (cdr-safe (assq selection evil-visual-alist)))))
+
+(defun evil-visual-goto-end ()
+  "Go to the last line of the Visual selection.
+This position may differ from `evil-visual-end' depending on
+the selection type, and is contained in the selection."
+  (let ((range (evil-contract-range (evil-visual-range))))
+    (goto-char (evil-range-end range))))
+
+(defun evil-visual-alist ()
+  "Return an association list from types to selection symbols."
+  (mapcar #'(lambda (e)
+              (cons (symbol-value (cdr-safe e)) (cdr-safe e)))
+          evil-visual-alist))
+
+(defun evil-visual-selection-function (selection)
+  "Return a selection function for TYPE.
+Default to `evil-visual-make-region'."
+  (or (cdr-safe (assq selection evil-visual-alist))
+      ;; generic selection function
+      'evil-visual-make-region))
+
+(defun evil-visual-selection-for-type (type)
+  "Return a Visual selection for TYPE."
+  (catch 'done
+    (dolist (selection evil-visual-alist)
+      (when (eq (symbol-value (cdr selection)) type)
+        (throw 'done (car selection))))))
+
+(defun evil-visual-block-corner (&optional corner point mark)
+  "Block corner corresponding to POINT, with MARK in opposite corner.
+Depending on POINT and MARK, the return value is `upper-left',
+`upper-right', `lower-left' or `lower-right':
+
+        upper-left +---+ upper-right
+                   |   |
+        lower-left +---+ lower-right
+
+One-column or one-row blocks are ambiguous. In such cases,
+the horizontal or vertical component of CORNER is used.
+CORNER defaults to `upper-left'."
+  (let* ((point (or point (point)))
+         (mark (or mark (mark t)))
+         (corner (symbol-name
+                  (or corner
+                      (and (overlayp evil-visual-overlay)
+                           (overlay-get evil-visual-overlay
+                                        :corner))
+                      'upper-left)))
+         (point-col (evil-column point))
+         (mark-col (evil-column mark))
+         horizontal vertical)
+    (cond
+     ((= point-col mark-col)
+      (setq horizontal
+            (or (and (string-match "left\\|right" corner)
+                     (match-string 0 corner))
+                "left")))
+     ((< point-col mark-col)
+      (setq horizontal "left"))
+     ((> point-col mark-col)
+      (setq horizontal "right")))
+    (cond
+     ((= (line-number-at-pos point)
+         (line-number-at-pos mark))
+      (setq vertical
+            (or (and (string-match "upper\\|lower" corner)
+                     (match-string 0 corner))
+                "upper")))
+     ((< point mark)
+      (setq vertical "upper"))
+     ((> point mark)
+      (setq vertical "lower")))
+    (intern (format "%s-%s" vertical horizontal))))
+
+;;; Operator-Pending state
+
+(evil-define-state operator
+  "Operator-Pending state."
+  :tag " <O> "
+  :cursor evil-half-cursor
+  :enable (evil-operator-shortcut-map operator motion normal))
+
+(evil-define-keymap evil-operator-shortcut-map
+  "Keymap for Operator-Pending shortcuts like \"dd\" and \"gqq\"."
+  :local t
+  (setq evil-operator-shortcut-map (make-sparse-keymap))
+  (evil-initialize-local-keymaps))
+
+;; the half-height "Operator-Pending cursor" cannot be specified
+;; as a static `cursor-type' value, since its height depends on
+;; the current font size
+(defun evil-half-cursor ()
+  "Change cursor to a half-height box.
+\(This is really just a thick horizontal bar.)"
+  (let ((height (/ (window-pixel-height) (* (window-height) 2))))
+    (setq cursor-type (cons 'hbar height))))
+
+;;; Replace state
+
+(evil-define-state replace
+  "Replace state."
+  :tag " <R> "
+  :cursor hbar
+  :message "-- REPLACE --"
+  :input-method t
+  (cond
+   ((evil-replace-state-p)
+    (overwrite-mode 1)
+    (add-hook 'pre-command-hook #'evil-replace-pre-command nil t)
+    (unless (eq evil-want-fine-undo t)
+      (evil-start-undo-step)))
+   (t
+    (overwrite-mode -1)
+    (remove-hook 'pre-command-hook #'evil-replace-pre-command t)
+    (unless (eq evil-want-fine-undo t)
+      (evil-end-undo-step))
+    (when evil-move-cursor-back
+      (evil-move-cursor-back))))
+  (setq evil-replace-alist nil))
+
+(defun evil-replace-pre-command ()
+  "Remember the character under point."
+  (when (evil-replace-state-p)
+    (unless (assq (point) evil-replace-alist)
+      (add-to-list 'evil-replace-alist
+                   (cons (point)
+                         (unless (eolp)
+                           (char-after)))))))
+(put 'evil-replace-pre-command 'permanent-local-hook t)
+
+(defun evil-replace-backspace ()
+  "Restore character under cursor."
+  (interactive)
+  (let (char)
+    (backward-char)
+    (when (assq (point) evil-replace-alist)
+      (setq char (cdr (assq (point) evil-replace-alist)))
+      (save-excursion
+        (delete-char 1)
+        (when char
+          (insert char))))))
+
+;;; Motion state
+
+(evil-define-state motion
+  "Motion state."
+  :tag " <M> "
+  :suppress-keymap t)
+
+;;; Emacs state
+
+(evil-define-state emacs
+  "Emacs state."
+  :tag " <E> "
+  :message "-- EMACS --"
+  :input-method t
+  :intercept-esc nil)
+
+(provide 'evil-states)
+
+;;; evil-states.el ends here