;;; packages.el --- Source Control Layer packages File for Spacemacs
;;
;; Copyright (c) 2012-2018 Sylvain Benner & Contributors
;;
;; Author: Sylvain Benner <sylvain.benner@gmail.com>
;; URL: https://github.com/syl20bnr/spacemacs
;;
;; This file is not part of GNU Emacs.
;;
;;; License: GPLv3

(setq version-control-packages
      '(
        browse-at-remote
        diff-mode
        diff-hl
        evil-unimpaired
        git-gutter
        git-gutter+
        git-gutter-fringe
        git-gutter-fringe+
        (smerge-mode :location built-in)
        ))

(defun version-control/init-diff-mode ()
  (use-package diff-mode
    :defer t))

(defun version-control/init-diff-hl ()
  (use-package diff-hl
    :init
    (progn
      (setq diff-hl-side 'left)
      (when (eq version-control-diff-tool 'diff-hl)
        (when (configuration-layer/package-used-p 'magit)
          (add-hook 'magit-post-refresh-hook 'diff-hl-magit-post-refresh))
        (when version-control-global-margin
          (global-diff-hl-mode))
        (diff-hl-margin-mode)
        (spacemacs|do-after-display-system-init
         (setq diff-hl-side (if (eq version-control-diff-side 'left)
                                'left 'right))
         (diff-hl-margin-mode -1))))))

(defun version-control/post-init-evil-unimpaired ()
  (define-key evil-normal-state-map (kbd "[ h") 'spacemacs/vcs-previous-hunk)
  (define-key evil-normal-state-map (kbd "] h") 'spacemacs/vcs-next-hunk))

(defun version-control/init-git-gutter ()
  (use-package git-gutter
    :commands (global-git-gutter-mode git-gutter-mode)
    :init
    (progn
      ;; If you enable global minor mode
      (when (and (eq version-control-diff-tool 'git-gutter)
                 version-control-global-margin)
        (run-with-idle-timer 1 nil 'global-git-gutter-mode))
      (setq git-gutter:update-interval 2
            git-gutter:modified-sign " "
            git-gutter:added-sign "+"
            git-gutter:deleted-sign "-"
            git-gutter:diff-option "-w"
            git-gutter:hide-gutter t
            git-gutter:ask-p nil
            git-gutter:verbosity 0
            git-gutter:handled-backends '(git hg bzr svn)
            git-gutter:hide-gutter t))
    :config
    (spacemacs|hide-lighter git-gutter-mode)))

(defun version-control/init-git-gutter-fringe ()
  (use-package git-gutter-fringe
    :commands git-gutter-mode
    :init
    (progn
      (spacemacs|do-after-display-system-init
       (with-eval-after-load 'git-gutter
         (require 'git-gutter-fringe)))
      (setq git-gutter-fr:side (if (eq version-control-diff-side 'left)
                                   'left-fringe 'right-fringe)))
    :config
    (progn
      ;; custom graphics that works nice with half-width fringes
      (fringe-helper-define 'git-gutter-fr:added nil
        "..X...."
        "..X...."
        "XXXXX.."
        "..X...."
        "..X...."
        )
      (fringe-helper-define 'git-gutter-fr:deleted nil
        "......."
        "......."
        "XXXXX.."
        "......."
        "......."
        )
      (fringe-helper-define 'git-gutter-fr:modified nil
        "..X...."
        ".XXX..."
        "XX.XX.."
        ".XXX..."
        "..X...."
        ))))

(defun version-control/init-git-gutter+ ()
  (use-package git-gutter+
    :commands (global-git-gutter+-mode git-gutter+-mode git-gutter+-refresh)
    :init
    (progn
      ;; If you enable global minor mode
      (when (and (eq version-control-diff-tool 'git-gutter+)
                 version-control-global-margin)
        (add-hook 'magit-pre-refresh-hook 'git-gutter+-refresh)
        (run-with-idle-timer 1 nil 'global-git-gutter+-mode))
      (setq
       git-gutter+-modified-sign " "
       git-gutter+-added-sign "+"
       git-gutter+-deleted-sign "-"
       git-gutter+-diff-option "-w"
       git-gutter+-hide-gutter t))
    ;; identify magit changes
    :config
    (spacemacs|hide-lighter git-gutter+-mode)
    ;; (set-face-foreground 'git-gutter+-modified "black")
    ;; (set-face-foreground 'git-gutter+-added    "black")
    ;; (set-face-foreground 'git-gutter+-deleted  "black")
    ;; (set-face-background 'git-gutter+-modified "orange1")
    ;; (set-face-background 'git-gutter+-added    "green4")
    ;; (set-face-background 'git-gutter+-deleted  "red3")
    ))

(defun version-control/init-git-gutter-fringe+ ()
  (use-package git-gutter-fringe+
    :commands git-gutter+-mode
    :init
    (progn
      (spacemacs|do-after-display-system-init
       (with-eval-after-load 'git-gutter+
         (require 'git-gutter-fringe+)))
      (setq git-gutter-fr+-side (if (eq version-control-diff-side 'left)
                                    'left-fringe 'right-fringe)))
    :config
    (progn
      ;; custom graphics that works nice with half-width fringes
      (fringe-helper-define 'git-gutter-fr+-added nil
        "..X...."
        "..X...."
        "XXXXX.."
        "..X...."
        "..X...."
        )
      (fringe-helper-define 'git-gutter-fr+-deleted nil
        "......."
        "......."
        "XXXXX.."
        "......."
        "......."
        )
      (fringe-helper-define 'git-gutter-fr+-modified nil
        "..X...."
        ".XXX..."
        "XX.XX.."
        ".XXX..."
        "..X...."
        ))))


(defun version-control/init-smerge-mode ()
  (use-package smerge-mode
    :defer t
    :diminish smerge-mode
    :commands spacemacs/smerge-transient-state/body
    :init
    (spacemacs/set-leader-keys
      "gr" 'spacemacs/smerge-transient-state/body)
    :config
    (progn
      (spacemacs|define-transient-state smerge
        :title "smerge transient state"
        :doc "
 movement^^^^               merge action^^           other
 ---------------------^^^^  -------------------^^    -----------
 [_n_]^^    next hunk       [_b_] keep base          [_u_] undo
 [_N_/_p_]  prev hunk       [_m_] keep mine          [_r_] refine
 [_j_/_k_]  move up/down    [_a_] keep all           [_q_] quit
 ^^^^                       [_o_] keep other
 ^^^^                       [_c_] keep current
 ^^^^                       [_C_] combine with next"
        :bindings
        ("n" smerge-next)
        ("p" smerge-prev)
        ("N" smerge-prev)
        ("j" evil-next-line)
        ("k" evil-previous-line)
        ("a" smerge-keep-all)
        ("b" smerge-keep-base)
        ("m" smerge-keep-mine)
        ("o" smerge-keep-other)
        ("c" smerge-keep-current)
        ("C" smerge-combine-with-next)
        ("r" smerge-refine)
        ("u" undo-tree-undo)
        ("q" nil :exit t)))))

(defun version-control/init-browse-at-remote ()
  (use-package browse-at-remote
    :defer t
    :init (spacemacs/set-leader-keys "gho" 'browse-at-remote)))