188 lines
8.0 KiB
EmacsLisp
188 lines
8.0 KiB
EmacsLisp
;;; evil-collection-helm.el --- Evil bindings for Helm -*- lexical-binding: t -*-
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;; Copyright (C) 2017 Pierre Neidhardt
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;; Author: Pierre Neidhardt <ambrevar@gmail.com>
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;; Maintainer: James Nguyen <james@jojojames.com>
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;; Pierre Neidhardt <ambrevar@gmail.com>
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;; URL: https://github.com/emacs-evil/evil-collection
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;; Version: 0.0.1
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;; Package-Requires: ((emacs "25.1"))
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;; Keywords: evil, helm, tools
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;; This file 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
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;; by the Free Software Foundation; either version 3, or (at your
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;; option) any later version.
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;;
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;; This file 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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;; For a full copy of the GNU General Public License
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;; see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Evil bindings for Helm.
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;;; Code:
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(require 'evil)
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(require 'helm-files nil t) ; TODO: Check if this is the ideal requirement and if we are not loading too much.
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;; To navigate Helm entries with <hjkl> in insert state, we need a modifier.
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;; Using the C- modifier would conflict with the help prefix "C-h". So we use
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;; M- prefixed bindings instead.
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;; Helm-find-files: We cannot use "h" and "l" in normal state to navigate up and
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;; down the file system hierarchy since we need them to use it to edit the
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;; minibuffer content.
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(defvar helm-map)
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(defvar helm-find-files-map)
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(defvar helm-read-file-map)
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(defvar helm-echo-input-in-header-line)
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(defvar helm--prompt)
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(defvar helm--action-prompt)
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(defvar helm-header-line-space-before-prompt)
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(declare-function helm-window "helm-lib")
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(declare-function with-helm-buffer "helm-lib")
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;; From https://github.com/emacs-helm/helm/issues/362.
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;; Also see https://emacs.stackexchange.com/questions/17058/change-cursor-type-in-helm-header-line#17097.
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;; TODO: With Evil, the cursor type is not right in the header line and the evil
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;; cursor remains in the minibuffer. Visual selections also reveal overlayed
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;; text.
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(defun evil-collection-helm-hide-minibuffer-maybe ()
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"Hide text in minibuffer when `helm-echo-input-in-header-line' is non-nil."
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(when (with-helm-buffer helm-echo-input-in-header-line)
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(let ((ov (make-overlay (point-min) (point-max) nil nil t)))
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(overlay-put ov 'window (selected-window))
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(overlay-put ov 'face (let ((bg-color (face-background 'default nil)))
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`(:background ,bg-color :foreground ,bg-color)))
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(setq-local cursor-type nil))))
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(defun evil-collection-helm--set-header-line (&optional update)
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"Like `helm--set-header-line' with some Evil-specific tweaks.
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- The cursor changes when in Evil insert state.
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- Visual selection is highlighted."
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(with-selected-window (minibuffer-window)
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(let* ((beg (save-excursion (vertical-motion 0 (helm-window)) (point)))
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(end (save-excursion (end-of-visual-line) (point)))
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;; The visual line where the cursor is.
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(cont (buffer-substring beg end))
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(pref (propertize
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" "
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'display (if (string-match-p (regexp-opt `(,helm--prompt
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,helm--action-prompt))
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cont)
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`(space :width ,helm-header-line-space-before-prompt)
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(propertize
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"->"
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'face 'helm-header-line-left-margin))))
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(pos (- (point) beg)))
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;; Increment pos each time we find a "%" up to current-pos (#1648).
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(cl-loop for c across (buffer-substring-no-properties beg (point))
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when (eql c ?%) do (cl-incf pos))
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;; Increment pos when cursor is on a "%" to make it visible in header-line
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;; i.e "%%|" and not "%|%" (#1649).
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(when (eql (char-after) ?%) (setq pos (1+ pos)))
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(setq cont (replace-regexp-in-string "%" "%%" cont))
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(let ((state evil-state)
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(region-active (region-active-p))
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(m (mark t)))
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(with-helm-buffer
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(setq header-line-format (concat pref cont " "))
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(when region-active
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(setq m (- m beg))
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;; Increment pos to handle the space before prompt (i.e `pref').
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(put-text-property (1+ (min m pos)) (+ 2 (max m pos))
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'face
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(list :background (face-background 'region))
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header-line-format))
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(put-text-property
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;; Increment pos to handle the space before prompt (i.e `pref').
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(+ 1 pos) (+ 2 pos)
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'face
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(if (eq state 'insert)
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'underline
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;; Don't just use 'cursor, this can hide the current character.
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(list :inverse-video t
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:foreground (face-background 'cursor)
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:background (face-background 'default)))
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header-line-format)
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(when update (force-mode-line-update)))))))
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(defun evil-collection-helm-setup ()
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"Set up `evil' bindings for `helm'."
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(add-hook 'helm-minibuffer-set-up-hook 'evil-collection-helm-hide-minibuffer-maybe)
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(advice-add 'helm--set-header-line :override 'evil-collection-helm--set-header-line)
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(evil-define-key '(insert normal) helm-map
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(kbd "M-[") 'helm-previous-source
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(kbd "M-]") 'helm-next-source
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(kbd "M-l") 'helm-execute-persistent-action
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(kbd "M-j") 'helm-next-line
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(kbd "M-k") 'helm-previous-line
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(kbd "C-f") 'helm-next-page
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(kbd "C-b") 'helm-previous-page)
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(dolist (map (list helm-find-files-map helm-read-file-map))
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(evil-define-key* 'normal map
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"go" 'helm-ff-run-switch-other-window
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"/" 'helm-ff-run-find-sh-command)
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(evil-define-key* '(insert normal) map
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(kbd "S-<return>") 'helm-ff-run-switch-other-window
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(kbd "M-h") 'helm-find-files-up-one-level))
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;; TODO: Change the Helm header to display "M-l" instead of "C-l". We don't
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;; want to modify the Emacs Helm map.
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(evil-define-key '(insert normal) helm-generic-files-map (kbd "S-<return>") 'helm-ff-run-switch-other-window)
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(evil-define-key '(insert normal) helm-buffer-map (kbd "S-<return>") 'helm-buffer-switch-other-window)
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(evil-define-key '(insert normal) helm-buffer-map (kbd "M-<return>") 'display-buffer)
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(evil-define-key '(insert normal) helm-moccur-map (kbd "S-<return>") 'helm-moccur-run-goto-line-ow)
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(evil-define-key '(insert normal) helm-grep-map (kbd "S-<return>") 'helm-grep-run-other-window-action)
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(evil-define-key 'normal helm-generic-files-map "go" 'helm-ff-run-switch-other-window)
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(evil-define-key 'normal helm-buffer-map "go" 'helm-buffer-switch-other-window)
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(evil-define-key 'normal helm-buffer-map "gO" 'display-buffer)
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(evil-define-key 'normal helm-moccur-map "go" 'helm-moccur-run-goto-line-ow)
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(evil-define-key 'normal helm-grep-map "go" 'helm-grep-run-other-window-action)
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(evil-define-key 'normal helm-buffer-map
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"=" 'helm-buffer-run-ediff
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"%" 'helm-buffer-run-query-replace-regexp
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"D" 'helm-buffer-run-kill-persistent) ; Ivy has "D".
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(evil-define-key 'normal helm-find-files-map
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"=" 'helm-ff-run-ediff-file
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"%" 'helm-ff-run-query-replace-regexp
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"D" 'helm-ff-run-delete-file) ; Ivy has "D".
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(evil-define-key 'normal helm-map
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(kbd "<tab>") 'helm-select-action ; TODO: Ivy has "ga".
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(kbd "[") 'helm-previous-source
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(kbd "]") 'helm-next-source
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"gk" 'helm-previous-source
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"gj" 'helm-next-source
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(kbd "(") 'helm-prev-visible-mark
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(kbd ")") 'helm-next-visible-mark
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"j" 'helm-next-line
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"k" 'helm-previous-line
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"gg" 'helm-beginning-of-buffer
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"G" 'helm-end-of-buffer
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"/" 'helm-quit-and-find-file
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;; refresh
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"gr" 'helm-refresh
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"yp" 'helm-yank-selection
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"yP" 'helm-copy-to-buffer
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"yy" 'helm-kill-selection-and-quit
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(kbd "SPC") 'helm-toggle-visible-mark))
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(provide 'evil-collection-helm)
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;;; evil-collection-helm.el ends here
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