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;; Time-stamp: <2022-04-17 16h03 EDT (academic)>

(defvar latex-template-dir (expand-file-name "~/typeset/latex-templates"))
(defun prompt-latex-file-template ()
  "Check if tex file does not exist or the command was called
interactively. If neither, prompt to insert from a template
populated from the directory *latex-template-dir*"
  (interactive)
  (when (and (if (file-exists-p (buffer-file-name))
		 (called-interactively-p 'interactive)
	       t)
	     (yes-or-no-p "Insert template?"))
    (let* ((tfiles (directory-files latex-template-dir nil "\\.tex"))
	   (template (completing-read "Select template: " tfiles nil t)))
      (when template
	(goto-char (point-min))
	(insert-file-contents (concat latex-template-dir "/" template))
	(search-forward "begin{document}")
	(forward-line)
	(save-buffer)))))

(use-package cdm-mode
  :load-path "~/.emacs.d/scripts/")

(use-package unfill :ensure t)

(use-package latex
  :ensure auctex
  :bind (:map LaTeX-mode-map
	      ("<" . LaTeX-insert-left-brace)
	      ;; ("|" . LaTeX-insert-left-brace)
	      ("'" . better-TeX-insert-single-quote)
	      ;; ("TAB" . LaTeX-indent-line)
	      ("M-TAB" . TeX-complete-symbol)
	      ("M-q" . unfill-paragraph)
	      ("C-c e" . LaTeX-environment)
	      ("C-c C-d" . TeX-view))

  :hook (LaTeX-mode . (lambda ()
			(latex-setup-visual-aesthetics)
			(latex-setup-text-environment)
			(latex-setup-special-minor-modes)
			(latex-setup-completions)
			(prompt-latex-file-template)))
  :init
  (defun latex-setup-visual-aesthetics ()
    (interactive)
    (variable-pitch-mode 1)
    (auto-fill-mode -1)
    (visual-line-mode)
    (display-line-numbers-mode))

  (defun latex-setup-text-environment ()
    (interactive)
    (electric-pair-local-mode 1)
    (latex-electric-env-pair-mode)
    (spell-fu-mode)
    (siege-mode 1))

  (defun latex-setup-special-minor-modes ()
    (interactive)
    (setq-default cdlatex-takeover-parenthesis nil)
    (cdlatex-mode t)
    (cdm-mode))

  (defun latex-setup-completions ()
    (interactive)
    (require 'reftex)
    (turn-on-reftex)
    ;; We want completion for cleverf too!
    (push '("\\\\[Cc]ref{\\([^{}\\%,]*\\)" 1 LaTeX-label-list "}") TeX-complete-list)
    ;; and we want to use reftex
    (push '("\\\\cite\\[[^]\n
\\%]*\\]{\\([^{}\n
\\%,]*\\)" reftex-citep) TeX-complete-list)
    (push '("\\\\cite{\\([^{}\n
\\%,]*\\)" reftex-citep) TeX-complete-list))

  (defun better-TeX-insert-single-quote ()
    (interactive)
    (let ((old-open TeX-open-quote)
	  (old-close TeX-close-quote))
      (unwind-protect (progn
			(setq TeX-open-quote "`"
			      TeX-close-quote "'")
			(call-interactively 'TeX-insert-quote))
	(setq TeX-open-quote old-open
	      TeX-close-quote old-close))))

  :config
  (setq TeX-debug-bad-boxes t
	TeX-command-list '(("XeLaTeX" "xelatex %t"
			    TeX-run-TeX nil (latex-mode doctex-mode) :help "Run XeLaTeX")
			   ("TeX" "%(PDF)%(tex) %(file-line-error) %`%(extraopts) %S%(PDFout)%(mode)%' %t"
			    TeX-run-TeX nil (plain-tex-mode ams-tex-mode texinfo-mode) :help "Run plain TeX")
			   ("LaTeX" "%`%l%(mode)%' %T"
			    TeX-run-TeX nil (latex-mode doctex-mode) :help "Run LaTeX")
			   ("Biber" "biber %s %(output-dir)" TeX-run-Biber nil
			    (plain-tex-mode latex-mode doctex-mode ams-tex-mode texinfo-mode) :help "Run Biber")
			   ("BibTeX" "bibtex %s" TeX-run-BibTeX nil
			    (plain-tex-mode latex-mode doctex-mode ams-tex-mode texinfo-mode context-mode) :help "Run BibTeX")
			   ("View" "%V" TeX-run-discard-or-function t t :help "Run External Viewer")
			   ("View internally" "(find-file \"%o\")" TeX-run-function nil t :help "Run Viewer")
			   ("Spell" "(TeX-ispell-document \"\")" TeX-run-function nil t :help "Spell-check the document")
			   ("Clean" "TeX-clean" TeX-run-function nil t :help "Delete generated intermediate files")
			   ("Clean All" "(TeX-clean t)" TeX-run-function nil t :help "Delete generated intermediate and output files")
			   ("Other" "" TeX-run-command t t :help "Run an arbitrary command")))

  (setq TeX-electric-sub-and-superscript t
	TeX-electric-math '("$" . "$")
	TeX-electric-escape nil
	LaTeX-electric-left-right-brace t)

  ;; no idea why this is not a default ... ?
  (push '("<" . ">") TeX-braces-association)

  (setq reftex-plug-into-AUCTeX t)
  ;; (setq-default TeX-master nil)
  (setq TeX-auto-save t
	TeX-parse-self t
	TeX-PDF-mode t
	TeX-source-correlate-mode 'synctex
	TeX-view-program-selection '(((output-dvi style-pstricks) "dvips and gv")
				     (output-dvi "xdvi")
				     (output-pdf "Zathura")
				     (output-html "xdg-open")))

  ;; for PDF tools
  ;; (add-hook 'TeX-after-compilation-finished-functions #'TeX-revert-document-buffer)
  )


(use-package cdlatex
  :ensure t
  :bind (:map cdlatex-mode-map
	      ("(" . nil)
	      ("{" . nil)
	      ("[" . nil)
	      ("|" . nil)
	      ("<" . nil)
	      ("'" . nil)
	      ("TAB" . cdlatex-tab)
	      ;; ("C-c e" . cdlatex-environment)
	      ("~" . cdlatex-math-modify)
	      ("`" . cdlatex-math-symbol))
  :init
  (setq cdlatex-math-modify-prefix ?~
	cdlatex-math-symbol-prefix ?`
	cdlatex-math-modify-alist '((?a "\\mathbb" nil t nil nil)
				    (?c "\\mathcal" "\\textsc" t nil nil)
				    (?v "\\texttt" "\\texttt" t nil nil)
				    (?k "\\mathfrak" nil t nil nil)
				    (?- "\\overline" nil t nil nil)
				    (?_ "\\underline" nil t nil nil))
	cdlatex-math-symbol-alist '((?^ ("\\widehat{?}" "\\hat{?}"))
				    (?' ("^{\\prime}" "\\prime"))
				    (?* ("\\times" "\\otimes" "\\star"))
				    (?+ ("+" "\\oplus"))
				    (?- ("\\dashv" "\\vdash" "\\setminus"))
				    (?. ("\\circ" "\\sq" "\\cdot"))
				    (?0 ("\\emptyset" "\\circ"))
				    (?< ("\\leftarrow" "\\leftharpoonup" "\\xleftarrow"))
				    (?> ("\\to" "\\rightharpoonup" "\\xrightarrow"))
				    (?B ("\\bullet"))
				    (?C ("\\widecheck{?}" "\\check{?}"))
				    (?f ("\\varphi" "\\phi"))
				    (?F ("\\Phi" "\\Varphi"))
				    (?M ("\\begin{bsmallmatrix}?\\end{bsmallmatrix}"))
				    (?P ("\\Prod{?}" "\\Pi" "\\partial"))
				    (?S ("\\Sum{?}" "\\Sigma" "\\arcsin"))
				    (?\"("^{\\prime\\prime}" "\\prime\\prime"))
				    (?a ("\\alpha" "\\cap" "\\sqcap"))
				    (?c ("\\cat{?}" "\\catn{?}"))
				    (?e ("\\varepsilon" "\\epsilon" "\\exp{?}"))
				    (?i ("\\iota" "\\in"))
				    (?j ("{\\id^{h}}_{?}" "{\\id^{v}}_{?}"))
				    (?r ("\\rho" "\\varrho" "\\restrict{?}"))
				    (?u ("\\upsilon" "\\cup" "\\sqcup"))
				    (?y ("\\psi" "\\Psi"))
				    (?{ ("\\subseteq" "\\subsetneq"))
				    (?} ("\\supseteq" "\\supsetneq"))
				    )))