Merge pull request #332 from UndeadKernel/latex_module

Latex module revamped

modules/lang/latex/+fontification.el

@@ -0,0 +1,89 @@
+;;; lang/latex/+fontification.el -*- lexical-binding: t; -*-
+
+;; Fontification taken from https://tex.stackexchange.com/a/86119/81279
+(setq font-latex-match-reference-keywords
+      '(
+        ;; biblatex
+        ("printbibliography" "[{")
+        ("addbibresource" "[{")
+        ;; Standard commands
+        ("cite" "[{")
+        ("Cite" "[{")
+        ("parencite" "[{")
+        ("Parencite" "[{")
+        ("footcite" "[{")
+        ("footcitetext" "[{")
+        ;; Style-specific commands
+        ("textcite" "[{")
+        ("Textcite" "[{")
+        ("smartcite" "[{")
+        ("Smartcite" "[{")
+        ("cite*" "[{")
+        ("parencite*" "[{")
+        ("supercite" "[{")
+        ;; Qualified citation lists
+        ("cites" "[{")
+        ("Cites" "[{")
+        ("parencites" "[{")
+        ("Parencites" "[{")
+        ("footcites" "[{")
+        ("footcitetexts" "[{")
+        ("smartcites" "[{")
+        ("Smartcites" "[{")
+        ("textcites" "[{")
+        ("Textcites" "[{")
+        ("supercites" "[{")
+        ;; Style-independent commands
+        ("autocite" "[{")
+        ("Autocite" "[{")
+        ("autocite*" "[{")
+        ("Autocite*" "[{")
+        ("autocites" "[{")
+        ("Autocites" "[{")
+        ;; Text commands
+        ("citeauthor" "[{")
+        ("Citeauthor" "[{")
+        ("citetitle" "[{")
+        ("citetitle*" "[{")
+        ("citeyear" "[{")
+        ("citedate" "[{")
+        ("citeurl" "[{")
+        ;; Special commands
+        ("fullcite" "[{")
+        ;; cleveref
+        ("cref" "{")
+        ("Cref" "{")
+        ("cpageref" "{")
+        ("Cpageref" "{")
+        ("cpagerefrange" "{")
+        ("Cpagerefrange" "{")
+        ("crefrange" "{")
+        ("Crefrange" "{")
+        ("labelcref" "{")))
+
+(setq font-latex-match-textual-keywords
+      '(
+        ;; biblatex brackets
+        ("parentext" "{")
+        ("brackettext" "{")
+        ("hybridblockquote" "[{")
+        ;; Auxiliary Commands
+        ("textelp" "{")
+        ("textelp*" "{")
+        ("textins" "{")
+        ("textins*" "{")
+        ;; subcaption
+        ("subcaption" "[{")))
+
+(setq font-latex-match-variable-keywords
+      '(
+        ;; amsmath
+        ("numberwithin" "{")
+        ;; enumitem
+        ("setlist" "[{")
+        ("setlist*" "[{")
+        ("newlist" "{")
+        ("renewlist" "{")
+        ("setlistdepth" "{")
+        ("restartlist" "{")
+        ("crefname" "{")))

modules/lang/latex/README.org

@@ -0,0 +1,53 @@
+#+TITLE: :lang latex
+
+* Module Description
+Provide a helping hand when working with LaTeX documents.
+
+** Feature:
++ Sane defaults
++ Fontification of many popular commands
++ Pretty indentation of wrapped lines using the ~adaptive-wrap~ package
++ Spell checking with ~flyschek~
++ Change PDF viewer to Okular or ~latex-preview-pane~
++ Bibtex editor
++ Autocompletion using ~company-mode~
++ Ivy or Helm for selecting bibliography
++ Compile your .tex code only once using LatexMk
+
+
+* Customization
+
+** Custom Variables
+Two custom variables state where AUCTeX will search for bibliography files and their corresponding PDFs.
+Set these variables in your private configuration with:
+#+BEGIN_SRC emacs_lisp
+(set! :latex-bibtex-file "./your/bib/file.bib")
+(set! :latex-bibtex-pdfs-dir "./dir/with/bib/pdfs/")
+#+END_SRC
+If the variables are not set, they are ignored.
+
+** LatexMk
+Use LatexMk instead of normal LaTeX to compile documents. LatexMk only needs to run once to get all references, bibliography and other things right.
+
+Activate with the flag '+latexmk' of the latex module in init.el.
+#+BEGIN_SRC emacs_lisp
+(latex +latexmk)
+#+END_SRC
+
+** Okular
+Use Okular as default PDF viewer.
+
+Activate with the flag '+okular' of the latex module in init.el.
+#+BEGIN_SRC emacs_lisp
+(latex +okular)
+#+END_SRC
+
+** Preivew-Pane
+Instead of using an external program to display rendered .tex files, use an emacs window to display the rendered file. 
+
+This flag is incompatible with the ~+okular~ flag.
+
+Activate with the flag '+preview-pane' of the latex module in init.el.
+#+BEGIN_SRC emacs_lisp
+(latex +preview-pane)
+#+END_SRC

modules/lang/latex/autoload.el

@@ -0,0 +1,43 @@
+;;; lang/latex/autoload.el -*- lexical-binding: t; -*-
+
+;;;###autoload
+(defun +latex/LaTeX-indent-item ()
+  "Provide proper indentation for LaTeX \"itemize\",\"enumerate\", and \"description\" environments.
+
+  \"\\item\" is indented `LaTeX-indent-level' spaces relative to
+  the the beginning of the environment.
+
+  Continuation lines are indented either twice
+  `LaTeX-indent-level', or `LaTeX-indent-level-item-continuation'
+  if the latter is bound."
+  (save-match-data
+    (let* ((offset LaTeX-indent-level)
+           (contin (or (and (boundp '+latex-indent-level-item-continuation)
+                            +latex-indent-level-item-continuation)
+                       (* 4 LaTeX-indent-level)))
+           (re-beg "\\\\begin{")
+           (re-end "\\\\end{")
+           (re-env "\\(itemize\\|\\enumerate\\|description\\)")
+           (indent (save-excursion
+                     (when (looking-at (concat re-beg re-env "}"))
+                       (end-of-line))
+                     (LaTeX-find-matching-begin)
+                     (current-column))))
+      (cond ((looking-at (concat re-beg re-env "}"))
+             (or (save-excursion
+                   (beginning-of-line)
+                   (ignore-errors
+                     (LaTeX-find-matching-begin)
+                     (+ (current-column)
+                        (if (looking-at (concat re-beg re-env "}"))
+                            contin
+                          offset))))
+                 indent))
+            ((looking-at (concat re-end re-env "}"))
+             indent)
+            ((looking-at "\\\\item")
+             (+ offset indent))
+            (t
+             (+ contin indent))))))
+
+

modules/lang/latex/config.el

@@ -1,96 +1,225 @@
 ;;; lang/latex/config.el -*- lexical-binding: t; -*-
 
-(defvar +latex-bibtex-dir "~/work/writing/biblio/"
+(defvar +latex-bibtex-file ""
+  "File AUCTeX (specifically RefTeX) uses to search for citations.")
+
+(defvar +latex-bibtex-dir ""
   "Where bibtex files are kept.")
 
-(defvar +latex-bibtex-default-file "default.bib"
+(defvar +latex-indent-level-item-continuation 8
-  "TODO")
+  "Custom indentation level for items in enumeration-type environments")
 
 
-;;
+(def-setting! :latex-bibtex-file (file)
-;; AucTex/LaTeX bootstrap
+  "Sets the default file RefTeX uses to search for citations."
-;;
+  `(setq +latex-bibtex-file ,file))
 
-;; Because tex-mode is built-in and AucTex has conflicting components, we need
+(def-setting! :latex-bibtex-dir (dir)
-;; to ensure that auctex gets loaded instead of tex-mode.
+  "Sets the directory where AUCTeX will search for PDFs associated to BibTeX references."
-(load "auctex" nil t)
+  `(setq +latex-bibtex-dir ,dir))
-(load "auctex-autoloads" nil t)
-(push '("\\.[tT]e[xX]\\'" . TeX-latex-mode) auto-mode-alist)
 
-(add-hook! (latex-mode LaTeX-mode) #'turn-on-auto-fill)
-(add-hook! 'LaTeX-mode-hook #'(LaTeX-math-mode TeX-source-correlate-mode))
 
-(add-transient-hook! 'LaTeX-mode-hook
+(def-package! tex-site
-  (setq TeX-auto-save t
+  :init
+  ;; Manually load the AUCTEX autoloads. This is normally done by package-initialize,
+  ;; ... which we do not use.
+  (load "auctex.el" nil t t)
+  (load "auctex-autoloads.el" nil t t)
+  :config
+  ;; Set some varibles to fontify common LaTeX commands.
+  (load! +fontification)
+  (setq
+        ;; Enable parse on load.
         TeX-parse-self t
+        ;; When running TeX, just save, don't ask
         TeX-save-query nil
+        ;; Enable parse on save.
+        TeX-auto-save t
+        ;; Use hidden directories for AUCTeX files.
+        TeX-auto-local ".auctex-auto"
+        TeX-style-local ".auctex-style"
+        ;; When correlating sources to rendered PDFs, don't start the emacs server
         TeX-source-correlate-start-server nil
-        LaTeX-fill-break-at-separators nil
+        TeX-source-correlate-mode t
-        LaTeX-section-hook
+        TeX-source-correlate-method 'synctex
-        '(LaTeX-section-heading
+        ;; Fonts for section, subsection, etc
-          LaTeX-section-title
+        font-latex-fontify-sectioning 1.15)
-          LaTeX-section-toc
+  (setq-default TeX-master nil)
-          LaTeX-section-section
+  ;; Display the output of the latex commands in a popup.
-          LaTeX-section-label))
-
   (set! :popup " output\\*$" '((size . 15)))
-  (map! :map LaTeX-mode-map "C-j" nil))
 
+  ;; TeX Font Styling
+  (def-package! tex-style
+    :defer t)
 
-;;
+  ;; TeX Folding
-;; Plugins
+  (def-package! tex-fold
-;;
+    :defer t
+    :init
+    (add-hook! 'TeX-mode-hook 'TeX-fold-mode))
 
-(def-package! reftex ; built-in
+  (def-package! latex
-  :commands (turn-on-reftex reftex-mode)
+    :defer t
+    :init
+    (setq
+     ;; Add the toc entry to the sectioning hooks.
+     LaTeX-section-hook
+       '(LaTeX-section-heading
+         LaTeX-section-title
+         LaTeX-section-toc
+         LaTeX-section-section
+         LaTeX-section-label)
+     LaTeX-fill-break-at-separators nil
+     ;; Item indentation.
+     LaTeX-item-indent 0)
+    :config
+    (map! :map LaTeX-mode-map "C-j" nil)
+    ;; Do not prompt for Master files, this allows auto-insert to add templates to .tex files
+    (add-hook! '(LaTeX-mode TeX-mode) '(lambda () (remove-hook 'find-file-hooks (car find-file-hooks) 'local)))
+    ;; Adding useful things for latex
+    (add-hook! LaTeX-mode (LaTeX-math-mode) (TeX-source-correlate-mode)(TeX-global-PDF-mode t)
+                          (TeX-PDF-mode t) (visual-line-mode +1))
+    (when (featurep! :feature spellcheck)
+      (add-hook! LaTeX-mode (flyspell-mode t)))
+    ;; Default language setting.
+    (setq ispell-dictionary "english")
+    ;; Use chktex to search for errors in a latex file.
+    (setcar (cdr (assoc "Check" TeX-command-list)) "chktex -v6 %s")
+    ;; Set a custom item indentation
+    (setq LaTeX-indent-environment-list
+          (nconc '(("itemize" +latex/LaTeX-indent-item)
+                   ("enumerate" +latex/LaTeX-indent-item)
+                   ("description" +latex/LaTeX-indent-item))
+                 LaTeX-indent-environment-list))))
+
+(after! latex
+  ;; Use Okular is the user says so.
+  (when (featurep! +okular)
+    ;; Configure Okular as viewer. Including a bug fix (https://bugs.kde.org/show_bug.cgi?id=373855)
+    (add-to-list 'TeX-view-program-list
+                 '("Okular" ("okular --unique file:%o" (mode-io-correlate "#src:%n%a"))))
+    (add-to-list 'TeX-view-program-selection
+                 '(output-pdf "Okular"))))
+
+(def-package! preview
+  ;; The preview package is currently broken with the latest AUCTeX version ("11.90.2.2017-07-25)
+  ;; ... and Ghostscript 9.22. It's now fixed in AUCTeX master, so we just have to wait.
+  :init
+  (progn
+    (setq-default preview-scale 1.4
+                  preview-scale-function '(lambda () (* (/ 10.0 (preview-document-pt)) preview-scale))))
+  (add-hook! LaTeX-mode #'LaTeX-preview-setup))
+
+(def-package! reftex
+  :commands turn-on-reftex
   :init
   (setq reftex-plug-into-AUCTeX t
-        reftex-default-bibliography (list +latex-bibtex-default-file)
+        reftex-toc-split-windows-fraction 0.3)
-        reftex-toc-split-windows-fraction 0.2)
+  (unless (string-empty-p +latex-bibtex-file)
-
+    (setq reftex-default-bibliography (list (expand-file-name +latex-bibtex-file))))
+  ; Get ReTeX working with biblatex
+  ; http://tex.stackexchange.com/questions/31966/setting-up-reftex-with-biblatex-citation-commands/31992#31992
+  (setq reftex-cite-format
+        '((?t . "\\textcite[]{%l}")
+          (?a . "\\autocite[]{%l}")
+          (?c . "\\cite[]{%l}")
+          (?s . "\\smartcite[]{%l}")
+          (?f . "\\footcite[]{%l}")
+          (?n . "\\nocite{%l}")
+          (?b . "\\blockcquote[]{%l}{}")))
   (add-hook! (latex-mode LaTeX-mode) #'turn-on-reftex)
-
   :config
   (map! :map reftex-mode-map
         :localleader :n ";" 'reftex-toc)
-
   (add-hook! 'reftex-toc-mode-hook
     (reftex-toc-rescan)
     (map! :local
           :e "j"   #'next-line
           :e "k"   #'previous-line
           :e "q"   #'kill-buffer-and-window
-          :e "ESC" #'kill-buffer-and-window)))
+          :e "ESC" #'kill-buffer-and-window
+          "C-g"    #'reftex-toc-quit)))
 
-
+(def-package! bibtex
-(def-package! bibtex ; built-in
   :defer t
+  :mode ("\\.bib" . bibtex-mode)
   :config
   (setq bibtex-dialect 'biblatex
         bibtex-align-at-equal-sign t
         bibtex-text-indentation 20
-        bibtex-completion-bibliography (list +latex-bibtex-default-file))
+        bibtex-completion-bibliography (list (expand-file-name +latex-bibtex-file)))
-
   (map! :map bibtex-mode-map "C-c \\" #'bibtex-fill-entry))
 
+(def-package! latex-preview-pane
+  :when (featurep! +preview-pane)
+  :commands latex-preview-pane-enable
+  :init
+  (setq latex-preview-pane-multifile-mode 'auctex)
+  (add-hook! (latex-mode LaTeX-mode) #'latex-preview-pane-enable)
+  (add-to-list 'TeX-view-program-list
+                 '("preview-pane"
+                   latex-preview-pane-mode))
+  (add-to-list 'TeX-view-program-selection
+                 '(output-pdf "preview-pane"))
+  :config
+  (map! :map doc-view-mode-map
+        "ESC" #'delete-window
+        "q"   #'delete-window
+        "k" (λ! (quit-window) (delete-window))))
+
+;; Enable latexmk only if the user explicitly says so with the module flag '+latexmk'.
+(def-package! auctex-latexmk
+  :when (featurep! +latexmk)
+  :init
+  ;; Pass the -pdf flag when TeX-PDF-mode is active
+  (setq auctex-latexmk-inherit-TeX-PDF-mode t)
+  ;; Set LatexMk as the default
+  (add-hook 'LaTeX-mode-hook '(lambda () (setq TeX-command-default "LatexMk")))
+  :config
+  ;; Add latexmk as a TeX target
+  (auctex-latexmk-setup))
 
 (def-package! ivy-bibtex
   :when (featurep! :completion ivy)
-  :commands ivy-bibtex)
+  :commands ivy-bibtex
-
+  :config
+  (setq ivy-bibtex-default-action 'ivy-bibtex-insert-key)
+  (unless (string-empty-p +latex-bibtex-file)
+    (setq bibtex-completion-bibliography (list (expand-file-name +latex-bibtex-file))))
+  (unless (string-empty-p +latex-bibtex-dir)
+    (setq bibtex-completion-library-path (list +latex-bibtex-dir)
+          bibtex-completion-pdf-field "file"
+          bibtex-completion-notes-path (f-expand "notes.org" +latex-bibtex-dir)
+          bibtex-completion-pdf-open-function
+          (lambda (fpath) (async-start-process "open-pdf" "/usr/bin/xdg-open" nil fpath)))))
 
 (def-package! helm-bibtex
   :when (featurep! :completion helm)
-  :commands helm-bibtex)
+  :commands helm-bibtex
-
+  :config
+  (unless (string-empty-p +latex-bibtex-file)
+    (setq bibtex-completion-bibliography (list (expand-file-name +latex-bibtex-file))))
+  (unless (string-empty-p +latex-bibtex-dir)
+    (setq bibtex-completion-library-path (list +latex-bibtex-dir)
+          bibtex-completion-pdf-field "file"
+          bibtex-completion-notes-path (f-expand "notes.org" +latex-bibtex-dir)
+          bibtex-completion-pdf-open-function
+          (lambda (fpath) (async-start-process "open-pdf" "/usr/bin/xdg-open" nil fpath)))))
 
 (def-package! company-auctex
   :when (featurep! :completion company)
-  :commands company-auctex-init
+  :commands (company-auctex-init)
   :init
   ;; We can't use the (set! :company-backend ...) because Auctex reports its
-  ;; major-mode as `latex-mode', but uses LaTeX-mode-hook for its mode, which is
+  ;; major-mode as `latex-mode', but uses LaTeX-mode-hook for its mode, which
-  ;; :company-backend doesn't anticipate (and shouldn't have to!)
+  ;; is not anticipated by :company-backend (and shouldn't have to!)
   (add-hook! LaTeX-mode
     (make-variable-buffer-local 'company-backends)
     (company-auctex-init)))
+
+;; Nicely indent lines that have wrapped when visual line mode is activated
+(def-package! adaptive-wrap
+  :commands (adaptive-wrap-prefix-mode)
+  :init
+  (add-hook! LaTeX-mode 'adaptive-wrap-prefix-mode)
+  (setq-default adaptive-wrap-extra-indent 0))

modules/lang/latex/packages.el

@@ -2,7 +2,18 @@
 ;;; lang/latex/packages.el
 
 (package! auctex)
-;; (package! auctex-latexmk)
+(package! flyspell)
+(package! adaptive-wrap)
+
+;; Optional module features:
+
+(when (featurep! +latexmk)
+  (package! auctex-latexmk))
+
+(when (featurep! +preview-pane)
+  (package! latex-preview-pane))
+
+;; Features according to other user selected options
 
 (when (featurep! :completion company)
   (package! company-auctex))
@@ -10,3 +21,4 @@
   (package! ivy-bibtex))
 (when (featurep! :completion helm)
   (package! helm-bibtex))
+