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;;; oni-csharp.el --- C# Configuration                   -*- lexical-binding: t; -*-

;; Copyright (C) 2019  Tom Willemse

;; Author: Tom Willemse <tom@ryuslash.org>
;; Keywords: local
;; Version: 2020.1210.205218
;; Package-Requires: (csharp-mode oni-company oni-flycheck oni-yasnippet oni-hydra oni-fci oni-lsp smartparens)

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; My C# configuration. This configuration enables ‘rainbow-delimiters-mode’.

;;; Code:

(require 'company)
(require 'csharp-mode)
(require 'hydra)
(require 'yasnippet)

(defconst oni-csharp-root
  (file-name-directory
   (or load-file-name
       (buffer-file-name)))
  "The directory where ‘oni-csharp’ was loaded from.")

(defconst oni-csharp-snippets-dir
  (expand-file-name "snippets" oni-csharp-root)
  "The directory where ‘oni-csharp’ stores its snippets.")

(defcustom oni-csharp-devenv-executable
  "\"C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Professional\\Common7\\IDE\\devenv.com\""
  "The location of the devenv.com executable."
  :group 'oni-csharp)

(defvar oni-csharp--projects (make-hash-table :test 'equal))

(defhydra oni-csharp-hydra (:color teal :hint nil)
  "
^Compile^
^^------------
_cp_: Project
_cs_: Solution
^^
"
  ("cp" oni-csharp-compile-project)
  ("cs" oni-csharp-compile-solution))

(defun oni-csharp-compile-solution ()
  (interactive)
  (let ((compile-command (concat oni-csharp-devenv-executable " /Build Debug " (oni-csharp-locate-dominating-file-wildcard "*.sln"))))
    (compile compile-command)))

(defun oni-csharp-locate-dominating-file-wildcard (filename)
  (let (file-list
        (default-directory default-directory))
    (while (and (null file-list)
                (string-prefix-p (projectile-project-root) default-directory))
      (setq file-list (file-expand-wildcards filename t)
            default-directory (file-name-directory (directory-file-name default-directory))))
    (car file-list)))

(defun oni-csharp-compile-project ()
  (interactive)
  (let ((compile-command (concat oni-csharp-devenv-executable " /Build Debug " (oni-csharp-locate-dominating-file-wildcard "*.sln") " /project " (oni-csharp-locate-dominating-file-wildcard "*.csproj"))))
    (compile compile-command)))

(defun oni-csharp-collect-project-names ()
  "Go through the current buffer and collect all the project names."
  (interactive)
  (clrhash oni-csharp--projects)
  (save-excursion
    (goto-char (point-min))
    (while (re-search-forward
            (rx bol
                "Project(\"{"
                (group (minimal-match (1+ (or alphanumeric "-"))))
                "}\") = \""
                (group (minimal-match (1+ any)))
                "\", \""
                (minimal-match (1+ any))
                "\", \"{"
                (group (minimal-match (1+ any)))
                "}\""
                eol)
            nil
            :noerror)
      (puthash (match-string-no-properties 3)
               (match-string-no-properties 2)
               oni-csharp--projects))))

(defun oni-csharp-display-project-names ()
  "Display the project names in the current buffer."
  (interactive)
  (save-excursion
    (goto-char (point-min))
    (remove-overlays (point-min) (point-max) 'oni-csharp--overlayp t)
    (while (re-search-forward
            (rx bol
                (zero-or-more whitespace)
                "{"
                (group (minimal-match (one-or-more (or alphanumeric "-"))))
                "} = {"
                (group (minimal-match (one-or-more (or alphanumeric "-"))))
                "}"
                eol)
            nil
            :noerror)
      (let ((current-overlay (make-overlay (line-beginning-position) (line-end-position))))
        (overlay-put current-overlay 'after-string
                     (propertize (format "  => %s" (gethash (match-string 1) oni-csharp--projects))
                                 'face '(:foreground "#808080")))
        (overlay-put current-overlay 'oni-csharp--overlayp t)
        (overlay-put current-overlay 'evaporate t)))))

(defun oni-csharp--auto-fill-mode ()
  "Enable ‘auto-fill-mode’ only for comments."
  (setq-local comment-auto-fill-only-comments t)
  (auto-fill-mode))

;;;###autoload
(defun oni-csharp-snippets-initialize ()
  "Initialize the snippets for ‘oni-csharp’."
  (when (boundp 'yas-snippet-dirs)
    (add-to-list 'yas-snippet-dirs oni-csharp-snippets-dir t))
  (yas-load-directory oni-csharp-snippets-dir))

(defun oni-csharp--update-style ()
  "Set style rules according to personal (or recommended) preference."
  (setf (alist-get 'arglist-intro c-offsets-alist) '+))

(add-hook 'csharp-mode-hook 'abbrev-mode)
(add-hook 'csharp-mode-hook 'company-mode)
(add-hook 'csharp-mode-hook 'electric-indent-local-mode)
(add-hook 'csharp-mode-hook 'flycheck-mode)
(add-hook 'csharp-mode-hook 'lsp)
(add-hook 'csharp-mode-hook 'oni-csharp--auto-fill-mode)
(add-hook 'csharp-mode-hook 'oni-csharp--update-style)
(add-hook 'csharp-mode-hook 'rainbow-delimiters-mode)
(add-hook 'csharp-mode-hook 'smartparens-mode)

(add-hook 'csharp-mode-hook
          (if (fboundp 'display-fill-column-indicator-mode)
              'display-fill-column-indicator-mode
            'fci-mode))

(define-key csharp-mode-map (kbd "C-c SPC") 'oni-csharp-hydra/body)

(define-abbrev csharp-mode-abbrev-table "and" "&&")
(define-abbrev csharp-mode-abbrev-table "or" "||")

;;;###autoload
(add-to-list 'auto-mode-alist '("\\.xaml\\'" . nxml-mode))

;;;###autoload
(add-to-list 'auto-mode-alist '("\\.targets\\'" . nxml-mode))

;;;###autoload
(add-to-list 'auto-mode-alist '("\\.proj\\'". nxml-mode))

;;;###autoload
(add-to-list 'auto-mode-alist '("\\.csproj\\'" . nxml-mode))

(with-eval-after-load 'autoinsert
  (add-to-list 'auto-insert-alist
               `(,(rx ".proj" string-end)
                 nil
                 "<Project xmlns=\"http://schemas.microsoft.com/developer/msbuild/2003\" ToolsVersion=\"4.0\">\n  " _ "\n</Project>")))

;;;###autoload
(with-eval-after-load 'csharp-mode
  (with-eval-after-load 'yasnippet
    (oni-csharp-snippets-initialize)))

;;;###autoload(with-eval-after-load 'csharp-mode (require 'oni-csharp))

(provide 'oni-csharp)
;;; oni-csharp.el ends here