forked from colonelpanic/dotfiles
608 lines
24 KiB
EmacsLisp
608 lines
24 KiB
EmacsLisp
;;; evil-repeat.el --- Repeat system
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;; Author: Frank Fischer <frank.fischer at mathematik.tu-chemnitz.de>
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;; Maintainer: Vegard Øye <vegard_oye at hotmail.com>
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;; Version: 1.0.1
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;;
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;; This file is NOT part of GNU Emacs.
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;;; License:
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;; This file is part of Evil.
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;;
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;; Evil is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;;
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;; Evil is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with Evil. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; A repeat begins when leaving Normal state; it ends when re-entering
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;; Normal state. The diagram below shows possible routes between
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;; Normal state (N), Insert state (I), Visual state (V),
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;; Operator-Pending state (O) and Replace state (R). (Emacs state
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;; is an exception: nothing is repeated in that state.)
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;; ___
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;; / \
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;; | R |
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;; \___/
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;; ^ |
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;; | |
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;; ___ |___V ___
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;; / \ <------- / \ -------> / \
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;; | V | | N | | O |
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;; \___/ -------> \___/ <------- \___/
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;; | | ^ |
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;; | | | |
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;; | V___| |
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;; | / \ |
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;; +--------> | I | <--------+
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;; \___/
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;;
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;; The recording of a repeat is started in one of two cases: Either a
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;; command is about being executed (in pre-command-hook) or normal
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;; state is exited. The recording is stopped whenever a command has
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;; being completed and evil is in normal state afterwards. Therefore,
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;; a non-inserting command in normal-state is recorded as a single
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;; repeat unit. In contrast, if the command leaves normal state and
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;; starts insert-state, all commands that are executed until
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;; insert-state is left and normal state is reactivated are recorded
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;; together in one repeat unit. In other words, a repeat unit consists
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;; of all commands that are executed starting and ending in normal
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;; state.
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;;
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;; Not all commands are recored. There are several commands that are
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;; completely ignored and other commands that even abort the currently
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;; active recording, e.g., commands that change the current buffer.
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;;
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;; During recording the repeat information is appended to the variable
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;; `evil-repeat-info', which is cleared when the recording
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;; starts. This accumulated repeat information is put into the
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;; `evil-repeat-ring' when the recording is finished. The dot command,
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;; `\[evil-repeat]' (`evil-repeat') replays the most recent entry in
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;; the ring, preceeding repeats can be replayed using
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;; `\[evil-repeat-pop]' (`evil-repeat-pop').
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;;
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;; Repeat information can be stored in almost arbitrary form. How the
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;; repeat information for each single command is recored is determined
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;; by the :repeat property of the command. This property has the
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;; following interpretation:
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;;
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;; t record commands by storing the key-sequence that invoked it
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;; nil ignore this command completely
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;; ignore synonym to nil
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;; motion command is recorded by storing the key-sequence but only in
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;; insert state, otherwise it is ignored.
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;; abort stop recording of repeat information immediately
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;; change record commands by storing buffer changes
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;; SYMBOL if SYMBOL is contained as key in `evil-repeat-types'
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;; call the corresponding (function-)value, otherwise
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;; call the function associated with SYMBOL. In both
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;; cases the function should take exactly one argument
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;; which is either 'pre or 'post depending on whether
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;; the function is called before or after the execution
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;; of the command.
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;;
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;; Therefore, using a certain SYMBOL one can write specific repeation
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;; functions for each command.
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;;
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;; Each value of ring `evil-repeat-info', i.e., each single repeat
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;; information must be one of the following two possibilities:
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;; If element is a sequence, it is regarded as a key-sequence to
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;; be repeated. Otherwise the element must be a list
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;; (FUNCTION PARAMS ...) which will be called using
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;; (apply FUNCTION PARAMS) whenever this repeat is being executed.
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;;
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;; A user supplied repeat function can use the functions
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;; `evil-record-repeat' to append further repeat-information of the
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;; form described above to `evil-repeat-info'. See the implementation
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;; of `evil-repeat-keystrokes' and `evil-repeat-changes' for examples.
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;; Those functions are called in different situations before and after
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;; the execution of a command. Each function should take one argument
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;; which can be either 'pre, 'post, 'pre-operator or 'post-operator
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;; specifying when the repeat function has been called. If the command
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;; is a usual command the function is called with 'pre before the
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;; command is executed and with 'post after the command has been
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;; executed.
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;;
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;; The repeat information is executed with `evil-execute-repeat-info',
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;; which passes key-sequence elements to `execute-kbd-macro' and
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;; executes other elements as defined above. A special version is
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;; `evil-execute-repeat-info-with-count'. This function works as
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;; `evil-execute-repeat-info', but replaces the count of the first
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;; command. This is done by parsing the key-sequence, ignoring all
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;; calls to `digit-prefix-argument' and `negative-argument', and
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;; prepending the count as a string to the vector of the remaining
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;; key-sequence.
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(require 'evil-states)
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;;; Code:
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(declare-function evil-visual-state-p "evil-visual")
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(declare-function evil-visual-range "evil-visual")
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(declare-function evil-visual-char "evil-visual")
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(declare-function evil-visual-line "evil-visual")
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(declare-function evil-visual-block "evil-visual")
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(defsubst evil-repeat-recording-p ()
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"Returns non-nil iff a recording is in progress."
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(eq evil-recording-repeat t))
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(defun evil-repeat-start ()
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"Start recording a new repeat into `evil-repeat-info'."
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(evil-repeat-reset t)
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(evil-repeat-record-buffer)
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(when (evil-visual-state-p)
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(let* ((range (evil-visual-range))
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(beg (evil-range-beginning range))
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(end (1- (evil-range-end range)))
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(nfwdlines (- (line-number-at-pos end)
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(line-number-at-pos beg))))
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(evil-repeat-record
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(cond
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((eq evil-visual-selection 'char)
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(list #'evil-repeat-visual-char
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nfwdlines
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(- end
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(if (zerop nfwdlines)
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beg
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(save-excursion
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(goto-char end)
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(line-beginning-position))))))
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((eq evil-visual-selection 'line)
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(list #'evil-repeat-visual-line nfwdlines))
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((eq evil-visual-selection 'block)
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(list #'evil-repeat-visual-block
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nfwdlines
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(abs (- (evil-column beg) (evil-column end))))))))))
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(defun evil-repeat-stop ()
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"Stop recording a repeat.
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Update `evil-repeat-ring' with the accumulated changes
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in `evil-repeat-info' and clear variables."
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(unwind-protect
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(when (evil-repeat-recording-p)
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(setq evil-repeat-info
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(evil-normalize-repeat-info evil-repeat-info))
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(when (and evil-repeat-info evil-repeat-ring)
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(ring-insert evil-repeat-ring evil-repeat-info)))
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(evil-repeat-reset nil)))
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(defun evil-repeat-abort ()
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"Abort current repeation."
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(evil-repeat-reset 'abort))
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(defun evil-repeat-reset (flag)
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"Clear all repeat recording variables.
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Set `evil-recording-repeat' to FLAG."
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(setq evil-recording-repeat flag
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evil-repeat-info nil
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evil-repeat-buffer nil))
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(defsubst evil-repeat-record-position (&optional pos)
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"Set `evil-repeat-pos' to POS or point."
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(setq evil-repeat-pos (or pos (point))))
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(defun evil-repeat-record-buffer ()
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"Set `evil-repeat-buffer' to the current buffer."
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(unless (minibufferp)
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(setq evil-repeat-buffer (current-buffer))))
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(defmacro evil-save-repeat-info (&rest body)
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"Execute BODY, protecting the values of repeat variables."
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(declare (indent defun)
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(debug t))
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`(let (evil-repeat-ring
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evil-recording-repeat
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evil-recording-current-command
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evil-repeat-info
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evil-repeat-changes
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evil-repeat-pos
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evil-repeat-keys
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evil-repeat-buffer
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this-command
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last-command)
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,@body))
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(defun evil-repeat-different-buffer-p (&optional strict)
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"Whether the buffer has changed in a repeat.
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If STRICT is non-nil, returns t if the previous buffer
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is unknown; otherwise returns t only if the previous
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buffer is known and different from the current buffer."
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(and (or (buffer-live-p evil-repeat-buffer) strict)
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(not (minibufferp))
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(not (eq (current-buffer) evil-repeat-buffer))))
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(defun evil-repeat-type (command &optional default)
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"Return the :repeat property of COMMAND.
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If COMMAND doesn't have this property, return DEFAULT."
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(when (functionp command) ; ignore keyboard macros
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(let* ((type (evil-get-command-property command :repeat default))
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(repeat-type (assq type evil-repeat-types)))
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(if repeat-type (cdr repeat-type) type))))
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(defun evil-repeat-force-abort-p (repeat-type)
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"Returns non-nil iff the current command should abort the recording of repeat information."
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(or (evil-repeat-different-buffer-p) ; ... buffer changed
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(eq repeat-type 'abort) ; ... explicitely forced
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(eq evil-recording-repeat 'abort) ; ... already aborted
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(evil-emacs-state-p) ; ... in Emacs state
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(and (evil-mouse-events-p (this-command-keys)) ; ... mouse events
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(eq repeat-type nil))
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(minibufferp))) ; ... minibuffer activated
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(defun evil-repeat-record (info)
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"Add INFO to the end of `evil-repeat-info'."
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(when (evil-repeat-recording-p)
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(setq evil-repeat-info (nconc evil-repeat-info (list info)))))
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;; called from `evil-normal-state-exit-hook'
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(defun evil-repeat-start-hook ()
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"Record a new repeat when exiting Normal state.
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Does not record in Emacs state or if the current command
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has :repeat nil."
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(when (and (eq (evil-repeat-type this-command t) t)
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(not (evil-emacs-state-p)))
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(evil-repeat-start)))
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;; called from `pre-command-hook'
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(defun evil-repeat-pre-hook ()
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"Prepare the current command for recording the repeation."
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(when evil-local-mode
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(let ((repeat-type (evil-repeat-type this-command t)))
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(cond
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;; abort the repeat
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((evil-repeat-force-abort-p repeat-type)
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;; We mark the current record as being aborted, because there
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;; may be further pre-hooks following before the post-hook is
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;; called.
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(evil-repeat-abort))
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;; ignore those commands completely
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((null repeat-type))
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;; record command
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(t
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;; In normal-state or visual state, each command is a single
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;; repeation, therefore start a new repeation.
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(when (or (evil-normal-state-p)
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(evil-visual-state-p))
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(evil-repeat-start))
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(setq evil-recording-current-command t)
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(funcall repeat-type 'pre))))))
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(put 'evil-repeat-pre-hook 'permanent-local-hook t)
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;; called from `post-command-hook'
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(defun evil-repeat-post-hook ()
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"Finish recording of repeat-information for the current-command."
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(when (and evil-local-mode evil-recording-repeat)
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(let ((repeat-type (evil-repeat-type this-command t)))
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(cond
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;; abort the repeat
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((evil-repeat-force-abort-p repeat-type)
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;; The command has been aborted but is complete, so just reset
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;; the recording state.
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(evil-repeat-reset nil))
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;; ignore if command should not be recorded or the current
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;; command is not being recorded
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((or (null repeat-type)
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(not evil-recording-current-command)))
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;; record command
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(t
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(funcall repeat-type 'post)
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;; In normal state, the repeat sequence is complete, so record it.
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(when (evil-normal-state-p)
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(evil-repeat-stop)))))
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;; done with recording the current command
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(setq evil-recording-current-command nil)))
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(put 'evil-repeat-post-hook 'permanent-local-hook t)
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(defun evil-clear-command-keys ()
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"Clear `this-command-keys' and all information about the current command keys.
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Calling this function prevents further recording of the keys that
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invoked the current command"
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(clear-this-command-keys t)
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(setq evil-repeat-keys ""))
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(defun evil-repeat-keystrokes (flag)
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"Repeation recording function for commands that are repeated by keystrokes."
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(cond
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((eq flag 'pre)
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(setq evil-repeat-keys (this-command-keys)))
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((eq flag 'post)
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(evil-repeat-record (if (zerop (length (this-command-keys)))
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evil-repeat-keys
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(this-command-keys)))
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;; erase commands keys to prevent double recording
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(evil-clear-command-keys))))
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(defun evil-repeat-motion (flag)
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"Repeation for motions. Motions are recorded by keystroke but only in insert state."
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(when (memq evil-state '(insert replace))
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(evil-repeat-keystrokes flag)))
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(defun evil-repeat-changes (flag)
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"Repeation recording function for commands that are repeated by buffer changes."
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(cond
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((eq flag 'pre)
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(add-hook 'after-change-functions #'evil-repeat-change-hook nil t)
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(evil-repeat-start-record-changes))
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((eq flag 'post)
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(remove-hook 'after-change-functions #'evil-repeat-change-hook t)
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(evil-repeat-finish-record-changes))))
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;; called from the `after-change-functions' hook
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(defun evil-repeat-change-hook (beg end length)
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"Record change information for current command."
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(let ((repeat-type (evil-repeat-type this-command t)))
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(when (and (evil-repeat-recording-p)
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(eq repeat-type 'evil-repeat-changes)
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(not (evil-emacs-state-p))
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(not (evil-repeat-different-buffer-p t))
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evil-state)
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(unless (evil-repeat-recording-p)
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(evil-repeat-start))
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(evil-repeat-record-change (- beg evil-repeat-pos)
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(buffer-substring beg end)
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length))))
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(put 'evil-repeat-change-hook 'permanent-local-hook t)
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(defun evil-repeat-record-change (relpos ins ndel)
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"Record the current buffer changes during a repeat.
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If CHANGE is specified, it is added to `evil-repeat-changes'."
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(when (evil-repeat-recording-p)
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(setq evil-repeat-changes
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(nconc evil-repeat-changes (list (list relpos ins ndel))))))
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(defun evil-repeat-start-record-changes ()
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"Starts the recording of a new set of buffer changes."
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(setq evil-repeat-changes nil)
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(evil-repeat-record-position))
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(defun evil-repeat-finish-record-changes ()
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"Finishes the recording of buffer changes and records them as repeat."
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(when (evil-repeat-recording-p)
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(evil-repeat-record `(evil-execute-change
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,evil-repeat-changes
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,(- (point) evil-repeat-pos)))
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(setq evil-repeat-changes nil)))
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(defun evil-repeat-insert-at-point (flag)
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"Repeation recording function for commands that insert text in region.
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This records text insertion when a command inserts some text in a
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buffer between (point) and (mark)."
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(cond
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((eq flag 'pre)
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(add-hook 'after-change-functions #'evil-repeat-insert-at-point-hook nil t))
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((eq flag 'post)
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(remove-hook 'after-change-functions #'evil-repeat-insert-at-point-hook t))))
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(defun evil-repeat-insert-at-point-hook (beg end length)
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(let ((repeat-type (evil-repeat-type this-command t)))
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(when (and (evil-repeat-recording-p)
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(eq repeat-type 'evil-repeat-insert-at-point)
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(not (evil-emacs-state-p))
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(not (evil-repeat-different-buffer-p t))
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evil-state)
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(setq evil-repeat-pos beg)
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(evil-repeat-record (list 'insert (buffer-substring beg end))))))
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(put 'evil-repeat-insert-at-point-hook 'permanent-local-hook t)
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(defun evil-normalize-repeat-info (repeat-info)
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"Concatenate consecutive arrays in REPEAT-INFO.
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Returns a single array."
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(let* ((result (cons nil nil))
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(result-last result)
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cur cur-last)
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(dolist (rep repeat-info)
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(cond
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((null rep))
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((arrayp rep)
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(setq rep (listify-key-sequence rep))
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(cond
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(cur
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(setcdr cur-last (cons rep nil))
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(setq cur-last (cdr cur-last)))
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(t
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(setq cur (cons rep nil))
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(setq cur-last cur))))
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(t
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(when cur
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(setcdr result-last (cons (apply #'vconcat cur) nil))
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(setq result-last (cdr result-last))
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(setq cur nil))
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(setcdr result-last (cons rep nil))
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(setq result-last (cdr result-last)))))
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(when cur
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(setcdr result-last (cons (apply #'vconcat cur) nil)))
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(cdr result)))
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(defun evil-repeat-visual-char (nfwdlines nfwdchars)
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"Restores a character visual selection.
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If the selection is in a single line, the restored visual
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selection covers the same number of characters. If the selection
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covers several lines, the restored selection covers the same
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number of lines and the same number of characters in the last
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line as the original selection."
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(evil-visual-char)
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(when (> nfwdlines 0)
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(forward-line nfwdlines))
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(forward-char nfwdchars))
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(defun evil-repeat-visual-line (nfwdlines)
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"Restores a character visual selection.
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If the selection is in a single line, the restored visual
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selection covers the same number of characters. If the selection
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covers several lines, the restored selection covers the same
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number of lines and the same number of characters in the last
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line as the original selection."
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(evil-visual-line)
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(forward-line nfwdlines))
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(defun evil-repeat-visual-block (nfwdlines nfwdchars)
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"Restores a character visual selection.
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If the selection is in a single line, the restored visual
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selection covers the same number of characters. If the selection
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covers several lines, the restored selection covers the same
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number of lines and the same number of characters in the last
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line as the original selection."
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(evil-visual-block)
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(let ((col (current-column)))
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(forward-line nfwdlines)
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(move-to-column (+ col nfwdchars) t)))
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(defun evil-execute-change (changes rel-point)
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"Executes as list of changes.
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CHANGES is a list of triples (REL-BEG INSERT-TEXT NDEL).
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|
REL-BEG is the relative position (to point) where the change
|
|
takes place. INSERT-TEXT is the text to be inserted at that
|
|
position and NDEL the number of characters to be deleted at that
|
|
position before insertion.
|
|
|
|
REL-POINT is the relative position to point before the changed
|
|
where point should be placed after all changes."
|
|
(evil-save-repeat-info
|
|
(let ((point (point)))
|
|
(dolist (change changes)
|
|
(goto-char (+ point (nth 0 change)))
|
|
(delete-char (nth 2 change))
|
|
(insert (nth 1 change)))
|
|
(goto-char (+ point rel-point)))))
|
|
|
|
(defun evil-execute-repeat-info (repeat-info)
|
|
"Executes a repeat-information REPEAT-INFO."
|
|
(evil-save-repeat-info
|
|
(dolist (rep repeat-info)
|
|
(cond
|
|
((or (arrayp rep) (stringp rep))
|
|
(execute-kbd-macro rep))
|
|
((consp rep)
|
|
(apply (car rep) (cdr rep)))
|
|
(t
|
|
(error "Unexpected repeat-info: %S" rep))))))
|
|
|
|
;; TODO: currently we prepend the replacing count before the
|
|
;; key-sequence that calls the command. Can we use direct
|
|
;; modification of prefix-arg instead? Does it work in
|
|
;; conjunction with `execute-kbd-macro'?
|
|
(defun evil-execute-repeat-info-with-count (count repeat-info)
|
|
"Repeat the repeat-information REPEAT-INFO with the count of
|
|
the first command replaced by COUNT. The count is replaced if
|
|
and only if COUNT is non-nil."
|
|
(evil-save-repeat-info
|
|
(cond
|
|
;; do nothing (zero repeating)
|
|
((and count (zerop count)))
|
|
;; replace count
|
|
(count
|
|
(let ((evil-repeat-count count)
|
|
done)
|
|
(while (and repeat-info
|
|
(arrayp (car repeat-info))
|
|
(not done))
|
|
(let* ((count-and-cmd (evil-extract-count (pop repeat-info))))
|
|
(push (vconcat (number-to-string count)
|
|
(nth 2 count-and-cmd)
|
|
(nth 3 count-and-cmd))
|
|
repeat-info)
|
|
(setq done t)))
|
|
(evil-execute-repeat-info repeat-info)))
|
|
;; repeat with original count
|
|
(t
|
|
(evil-execute-repeat-info repeat-info)))))
|
|
|
|
(evil-define-command evil-repeat (count &optional save-point)
|
|
"Repeat the last editing command with count replaced by COUNT.
|
|
If SAVE-POINT is non-nil, do not move point."
|
|
:repeat ignore
|
|
:suppress-operator t
|
|
(interactive (list current-prefix-arg
|
|
(not evil-repeat-move-cursor)))
|
|
(cond
|
|
((null evil-repeat-ring)
|
|
(error "Already executing repeat"))
|
|
(save-point
|
|
(save-excursion
|
|
(evil-repeat count)))
|
|
(t
|
|
(unwind-protect
|
|
(let ((confirm-kill-emacs t)
|
|
(kill-buffer-hook
|
|
(cons #'(lambda ()
|
|
(error "Cannot delete buffer in repeat command"))
|
|
kill-buffer-hook))
|
|
(undo-pointer buffer-undo-list))
|
|
(evil-with-single-undo
|
|
(setq evil-last-repeat (list (point) count undo-pointer))
|
|
(evil-execute-repeat-info-with-count
|
|
count (ring-ref evil-repeat-ring 0))))
|
|
(evil-normal-state)))))
|
|
|
|
;; TODO: the same issue concering disabled undos as for `evil-paste-pop'
|
|
(evil-define-command evil-repeat-pop (count &optional save-point)
|
|
"Replace the just repeated command with a previously executed command.
|
|
Only allowed after `evil-repeat', `evil-repeat-pop' or
|
|
`evil-repeat-pop-next'. Uses the same repeat count that
|
|
was used for the first repeat.
|
|
|
|
The COUNT argument inserts the COUNT-th previous kill.
|
|
If COUNT is negative, this is a more recent kill."
|
|
:repeat nil
|
|
:suppress-operator t
|
|
(interactive (list (prefix-numeric-value current-prefix-arg)
|
|
(not evil-repeat-move-cursor)))
|
|
(cond
|
|
((not (and (eq last-command #'evil-repeat)
|
|
evil-last-repeat))
|
|
(error "Previous command was not evil-repeat: %s" last-command))
|
|
(save-point
|
|
(save-excursion
|
|
(evil-repeat-pop count)))
|
|
(t
|
|
(unless (eq buffer-undo-list (nth 2 evil-last-repeat))
|
|
(evil-undo-pop))
|
|
(goto-char (car evil-last-repeat))
|
|
;; rotate the repeat-ring
|
|
(while (> count 0)
|
|
(when evil-repeat-ring
|
|
(ring-insert-at-beginning evil-repeat-ring
|
|
(ring-remove evil-repeat-ring 0)))
|
|
(setq count (1- count)))
|
|
(while (< count 0)
|
|
(when evil-repeat-ring
|
|
(ring-insert evil-repeat-ring
|
|
(ring-remove evil-repeat-ring)))
|
|
(setq count (1+ count)))
|
|
(setq this-command #'evil-repeat)
|
|
(evil-repeat (cadr evil-last-repeat)))))
|
|
|
|
(evil-define-command evil-repeat-pop-next (count &optional save-point)
|
|
"Same as `evil-repeat-pop', but with negative COUNT."
|
|
:repeat nil
|
|
:suppress-operator t
|
|
(interactive (list (prefix-numeric-value current-prefix-arg)
|
|
(not evil-repeat-move-cursor)))
|
|
(evil-repeat-pop (- count) save-point))
|
|
|
|
(defadvice read-key-sequence (before evil activate)
|
|
"Record `this-command-keys' before it is reset."
|
|
(when (and (evil-repeat-recording-p)
|
|
evil-recording-current-command)
|
|
(let ((repeat-type (evil-repeat-type this-command t)))
|
|
(if (functionp repeat-type)
|
|
(funcall repeat-type 'post)))))
|
|
|
|
(provide 'evil-repeat)
|
|
|
|
;;; evil-repeat.el ends here
|