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;;; eb --- Episode Browser development functions for Emacs

;;; Commentary:

;;; Code:

(defgroup eb nil "Episode Browser development environment")

;;;###autoload
(defun eb-quit-or-bury ()
  "Quit window or bury buffer."
  (interactive)
  (if (window-parameter (selected-window) 'quit-restore)
      (quit-window)
    (bury-buffer)))

;;;###autoload
(defun eb-exhume-buffer ()
  "Switch to last buffer in the buffer list."
  (interactive)
  (switch-to-buffer (last-buffer)))

;;;###autoload
(defun eb-list-buffers (&optional arg all)
  "List project buffers. By default, only file buffers are shown."
  (interactive "P")
  (require 'projectile)
  (if eb--list-buffers
      (quit-window)
    (let ((buffer
	   (list-buffers-noselect (not arg)
				  (when (and (not all) (projectile-project-p))
				    (if arg
					(projectile-project-buffers)
				      (mapcan
				       (lambda (b) (and (buffer-file-name b) (list b)))
				       (projectile-project-buffers)))))))
      (display-buffer-in-direction buffer '((direction . up)))
      (select-window (get-buffer-window buffer))
      (with-current-buffer buffer
	(setq-local eb--list-buffers t)))))

;;;###autoload
(defun eb-list-buffers-all (&optional arg)
  "List all buffers. By default, only file buffers are shown."
  (interactive "P")
  (eb-list-buffers nil t))

(define-advice Buffer-menu-mouse-select (:around (f event) eb-list-buffers)
  (if eb--list-buffers
      (progn
	(select-window (posn-window (event-end event)))
	(let ((buffer (tabulated-list-get-id (posn-point (event-end event)))))
	  (display-buffer buffer t)
	  (quit-window)))
    (funcall f event)))

;;;###autoload
(defun eb-dired (&optional dir)
  "Open the root of the current project in `dired'."
  (interactive)
  (require 'projectile)
  (when eb--list-buffers (quit-window))
  (setq dir (or dir (projectile-project-root)))
  (if (and (eq major-mode 'dired-mode) (equal default-directory dir))
      (bury-buffer)
    (dired dir)))

;;;###autoload
(defun eb-dired-here ()
  "Open the current working directory in `dired'."
  (interactive)
  (eb-dired default-directory))

;;;###autoload
(defun eb-grep ()
  "Grep project."
  (interactive)
  (require 'projectile)
  (if (projectile-project-p)
      (call-interactively #'projectile-grep)
    (call-interactively #'grep)))

(defcustom eb-system "vs2019"
  "Build system."
  :group 'eb
  :type '(radio (const "mingw") (const "vs2019")))

(defcustom eb-config "Debug"
  "Build configuration type."
  :group 'eb
  :type '(radio (const "Debug") (const "Release")))

(defcustom eb-cwd "b"
  "Working directory for executable."
  :group 'eb
  :type 'directory)

;;;###autoload
(defun eb-run ()
  "Launch built executable, displaying its output in a buffer."
  (interactive)
  (require 'projectile)
  (let ((buf (get-buffer-create "*eb-run*"))
	(exe (concat (projectile-project-root)
		     "/b/"
		     eb-system "/"
		     (if (not (string-equal eb-system "mingw"))
			 (concat eb-config "/")
		       "")
		     "EpisodeBrowser.exe"))
	(default-directory eb-cwd))
    (with-current-buffer buf
      (compilation-mode))
    (start-process "EpisodeBrowser" buf exe)
    (when (and (eq major-mode 'compilation-mode)
	       (window-parameter (selected-window) 'quit-restore))
      (quit-window))
    (display-buffer buf)))

(defvar-local eb--list-buffers nil)

;;;###autoload
(defun eb-compile ()
  "Compile project without prompt. Use `eb-system'."
  (interactive)
  (require 'projectile)
  (when (and (eq major-mode 'compilation-mode)
	     (window-parameter (selected-window) 'quit-restore))
    (quit-window))
  (if (projectile-project-p)
      (let ((compilation-read-command nil)
	    (command (concat "make SYSTEM=" eb-system " CONFIG=" eb-config)))
	(projectile--run-project-cmd command nil
                                     :show-prompt nil
                                     :prompt-prefix "Compile command: "
                                     :save-buffers t
                                     :use-comint-mode projectile-compile-use-comint-mode))
    (call-interactively #'compile))
  (with-current-buffer "*compilation*"
    (when (eql (point) (point-min))
      (goto-char (point-max)))))

;;;###autoload
(defun eb-check ()
  "Toggle `flycheck-list-errors'."
  (interactive)
  (require 'flycheck)
  (catch 'found
	 (dolist (win (window-list))
	   (with-selected-window win
	     (when (eq major-mode 'flycheck-error-list-mode)
	       (bury-buffer (window-buffer win))
	       (delete-window win)
	       (throw 'found t))))
	 (funcall #'flycheck-list-errors)))

;;;###autoload
(defun eb-vc ()
  "Open version control for project."
  (interactive)
  (require 'projectile)
  (when eb--list-buffers (quit-window))
  (projectile-vc (or (projectile-project-root) default-directory)))

;;;###autoload
(defun eb-customize ()
  "Customize group `eb'."
  (interactive)
  (customize-group 'eb))

(defvar-local eb-tool-bar-mode--old-map nil)
(defvar-local eb-tool-bar-mode--old-back-button-mode nil)
(defvar-local eb-tool-bar-mode--old-back-button-show-toolbar-buttons nil)

;;;###autoload
(define-minor-mode eb-tool-bar-mode
  "Useful tool bar buttons."
  :lighter " EB"
  (if eb-tool-bar-mode
      (progn
	(setq eb-tool-bar-mode--old-map tool-bar-map)
	(when (require 'back-button nil t)
	  (setq eb-tool-bar-mode--old-back-button-mode back-button-mode)
	  (setq eb-tool-bar-mode--old-back-button-show-toolbar-buttons back-button-show-toolbar-buttons)
	  (back-button-mode 1)
	  (setq-local back-button-show-toolbar-buttons nil))
	(let ((map (make-sparse-keymap)))

	  ;; Windows, buffers and files.
	  (tool-bar-local-item "cancel" #'eb-quit-or-bury 'quit-or-bury map
			       :label "Bury" :help "Bury buffer or window")
	  (define-key map [(shift quit-or-bury)] #'eb-exhume-buffer)
	  (define-key map [(control quit-or-bury)] #'delete-other-windows)
	  (tool-bar-local-item "index" #'eb-list-buffers 'list-buffers map
			       :label "Buffers" :help "Show project buffers")
	  (define-key map [(shift list-buffers)] #'eb-list-buffers-all)
	  (tool-bar-local-item "diropen" #'eb-dired 'dired map
			       :label "Root" :help "Browse project root")
	  (define-key map [(shift dired)] #'eb-dired-here)
	  (tool-bar-local-item "search-replace" #'eb-grep 'grep map
			       :label "Grep" :help "Grep project")

	  ;; Compilation and version control.
	  (define-key-after map [separator-1] menu-bar-separator)
	  (tool-bar-local-item "newsticker/next-item" #'eb-run 'run map
			       :label "Run" :help "Run executable")
	  (tool-bar-local-item "refresh" #'eb-compile 'compile map
			       :label "Compile" :help "Compile project")
	  (tool-bar-local-item "info" #'eb-check 'check map
			       :label "Check" :help "Check warnings and errors")
	  (define-key map [(shift check)] #'flycheck-buffer)
	  (define-key map [(control check)] #'flycheck-mode)
	  (tool-bar-local-item "mail/inbox" #'eb-vc 'vc map
			       :label "Version Control" :help "Open project version control")

	  ;; Mark control.
	  (when (require 'back-button nil t)
	    (define-key-after map [separator-2] menu-bar-separator)
	    (tool-bar-local-item "left-arrow" #'back-button-global-backward 'previous-mark map
				 :label "Previous Mark" :help "Previous Mark")
	    (define-key map [(shift previous-mark)] #'back-button-local-backward)
	    (tool-bar-local-item "mpc/add" #'back-button-push-mark-local-and-global 'push-mark map
				 :label "Push Mark" :help "Push Mark")
	    (define-key map [(shift push-mark)] #'back-button-push-mark)
	    (tool-bar-local-item "right-arrow" #'back-button-global-forward 'next-mark map
				 :label "Next Mark" :help "Next Mark")
	    (define-key map [(shift next-mark)] #'back-button-local-forward))

	  ;; Miscellaneous.
	  (define-key-after map [separator-3] menu-bar-separator)
	  (tool-bar-local-item "preferences" #'eb-customize 'customize map
			       :label "Customize" :help "Customize user options")

	  (setq-local tool-bar-map map)))
    (setq-local tool-bar-map eb-tool-bar-mode--old-map)
    (when (require 'back-button nil t)
      (if (not eb-tool-bar-mode--old-back-button-mode)
	  (back-button-mode 0))
      (setq-local back-button-show-toolbar-buttons eb-tool-bar-mode--old-back-button-show-toolbar-buttons))))

(define-global-minor-mode global-eb-tool-bar-mode eb-tool-bar-mode
  (lambda () (eb-tool-bar-mode 1))
  :group 'eb)

(provide 'eb)
;;; eb.el ends here