;;; packages.el --- Spacemacs Purpose Layer packages File for Spacemacs
;;
;; Copyright (c) 2012-2018 Sylvain Benner & Contributors
;;
;; Author: Bar Magal
;; URL: https://github.com/syl20bnr/spacemacs
;;
;; This file is not part of GNU Emacs.
;;
;;; License: GPLv3

(setq spacemacs-purpose-packages
      '(eyebrowse
        (helm-purpose :requires helm)
        (ivy-purpose :requires ivy)
        popwin
        (spacemacs-purpose-popwin
         :location local
         :requires popwin)
        window-purpose))

(defun spacemacs-purpose/pre-init-eyebrowse ()
  (spacemacs|use-package-add-hook eyebrowse
    :post-config
    (progn
      (add-hook 'purpose-mode-hook #'spacemacs/window-purpose-sync-eyebrowse)
      ;; sync with eyebrowse now
      (spacemacs/window-purpose-sync-eyebrowse))))

(defun spacemacs-purpose/init-helm-purpose ()
  (use-package helm-purpose
    :defer t
    :init
    (progn
      (setq purpose-preferred-prompt 'helm)
      ;; remap bindings defined with `spacemacs/set-leader-keys'
      (global-set-key [remap purpose-switch-buffer-with-purpose]
                      #'helm-purpose-switch-buffer-with-purpose)
      (global-set-key [remap switch-buffer-without-purpose]
                      #'helm-purpose-mini-ignore-purpose)
      (global-set-key [remap purpose-switch-buffer-with-some-purpose]
                      #'helm-purpose-switch-buffer-with-some-purpose))))

(defun spacemacs-purpose/init-ivy-purpose ()
  ;; vanilla lets `ivy' take over
  (use-package ivy-purpose
    :defer t
    :init
    (progn
      (setq purpose-preferred-prompt 'vanilla)
      (global-set-key [remap purpose-switch-buffer-with-purpose]
                      #'ivy-purpose-switch-buffer-with-purpose)
      (global-set-key [remap purpose-switch-buffer-without-purpose]
                      #'ivy-purpose-switch-buffer-without-purpose)
      (global-set-key [remap purpose-switch-buffer-with-some-purpose]
                      #'ivy-purpose-switch-buffer-with-some-purpose))))

(defun spacemacs-purpose/pre-init-popwin ()
  ;; when popwin creates a popup window, it removes the `purpose-dedicated'
  ;; window parameter from all windows, so we must save and restore it
  ;; ourselves. this works well as long as no buffer is displayed in more than
  ;; one window. if a buffer is displayed in several windows, and at least one
  ;; of these windows is purpose-dedicated, then all these windows will become
  ;; purpose-dedicated after popwin creates a popup window.
  ;; there is no problem if the local spacemacs-purpose-popwin package is used,
  ;; as long as the user doesn't call `popwin:create-popup-window' directly
  ;; (e.g. <f2> from `helm-mini')
  (spacemacs|use-package-add-hook popwin
    :post-config
    (progn
      (defvar window-purpose--dedicated-windows nil)
      (defadvice popwin:create-popup-window
          (before window-purpose/save-dedicated-windows)
        (setq window-purpose--dedicated-windows
              (cl-loop for window in (window-list)
                       if (purpose-window-purpose-dedicated-p window)
                       collect (window-buffer window))))
      (defadvice popwin:create-popup-window
          (after window-purpose/restore-dedicated-windows)
        (cl-loop for buffer in window-purpose--dedicated-windows
                 do (cl-loop for window in (get-buffer-window-list buffer)
                             do (purpose-set-window-purpose-dedicated-p
                                 window t))))
      (add-hook 'purpose-mode-hook #'spacemacs/window-purpose-sync-popwin)
      (with-eval-after-load 'window-purpose
        (spacemacs/window-purpose-sync-popwin)
        ;; can't have both `purpose-mode' and `popwin-mode' active at the same
        ;; time (see https://github.com/syl20bnr/spacemacs/issues/9593), but we
        ;; use `popwin' for its configuration so we can't just exclude it, so
        ;; current solution is to disable `popwin-mode' (which is enabled in
        ;; popwin's :config block)
        (popwin-mode -1)))))

(defun spacemacs-purpose/pre-init-spacemacs-purpose-popwin ()
  (spacemacs|use-package-add-hook window-purpose
    :post-config
    (progn
      ;; override popwin commands with pupo commands
      (spacemacs/set-leader-keys
        "wpp" #'pupo/close-window
        "wpP" #'pupo/close-all-windows)
      (pupo-mode))))
(defun spacemacs-purpose/init-spacemacs-purpose-popwin ()
  (use-package spacemacs-purpose-popwin :commands pupo-mode))

(defun spacemacs-purpose/init-window-purpose ()
  (use-package window-purpose
    :defer 0.1
    :init
    (progn
      ;; 'r' is for "puRpose" ('w', 'p' are crowded, 'W', 'P' aren't
      ;; comfortable)
      (spacemacs/set-leader-keys
        "rb" 'purpose-switch-buffer-with-purpose
        "rB" 'switch-buffer-without-purpose
        "rd" 'purpose-toggle-window-purpose-dedicated
        "rD" 'purpose-delete-non-dedicated-windows
        "rp" 'purpose-switch-buffer-with-some-purpose
        "rP" 'purpose-set-window-purpose))
    :config
    (progn
      (purpose-mode)
      ;; change `switch-to-buffer' display preferences according to
      ;; `dotspacemacs-switch-to-buffer-prefers-purpose'. This affects actions
      ;; like `spacemacs/alternate-buffer', and opening buffers from Dired
      (setcdr (assq 'switch-to-buffer purpose-action-sequences)
              (if dotspacemacs-switch-to-buffer-prefers-purpose
                  '(purpose-display-reuse-window-buffer
                    purpose-display-reuse-window-purpose
                    purpose-display-maybe-same-window
                    purpose-display-maybe-other-window
                    purpose-display-maybe-other-frame
                    purpose-display-maybe-pop-up-window
                    purpose-display-maybe-pop-up-frame)
                '(purpose-display-maybe-same-window
                  purpose-display-reuse-window-buffer
                  purpose-display-reuse-window-purpose
                  purpose-display-maybe-other-window
                  purpose-display-maybe-other-frame
                  purpose-display-maybe-pop-up-window
                  purpose-display-maybe-pop-up-frame)))
      ;; overriding `purpose-mode-map' with empty keymap, so it doesn't conflict
      ;; with original `C-x C-f', `C-x b', etc. and `semantic' key bindings.
      (setcdr purpose-mode-map nil)
      (spacemacs|diminish purpose-mode)
      (purpose-x-golden-ratio-setup))))