* [BUG]: elusive vertical white-space errors in engraved source block export
@ 2024-02-15 9:18 gerard.vermeulen
2024-02-20 8:04 ` Ihor Radchenko
0 siblings, 1 reply; 2+ messages in thread
From: gerard.vermeulen @ 2024-02-15 9:18 UTC (permalink / raw)
To: Emacs orgmode, Ihor Radchenko
[-- Attachment #1: Type: text/plain, Size: 845 bytes --]
Hi,
attached you'll find a pdf file showing the elusive vertical white-space
errors
using the engraved source block export backend that I demonstrated
yesterday
evening.
I also attached the org demonstration file and the mini-library that
makes the
demonstration file work.
You can find also everything at https://github.com/gav451/org-exp-exp
(except for the pdf).
I checked that the errors are also present in a minimal "clean"
environment
where the only installed packages are engrave-faces, auctex, and
pdf-tools.
I have also seen these kind of errors on Gentoo systems, but I have no
access
to those anymore.
I have a patch which is unacceptable because it limits the font size to
"normalsize" and it requires visible draw boxes around floating
listings.
Nevertheless, I attach it to show where I got stuck.
Regards -- Gerard
[-- Attachment #2: any-backend.org --]
[-- Type: application/octet-stream, Size: 26890 bytes --]
#+title: Switch to any Org LaTeX source block export backend
#+author: Gerard Vermeulen
#+latex-class: article
#+latex_class_options: [11pt,a4paper,english,svgnames]
#+property: header-args:emacs-lisp :tangle any-backend.el
#+options: ^:{} date:nil toc:2 timestamp:nil
#+startup: showeverything
#+begin_src latex :noweb yes :results raw
,#+latex_header: <<lst:latex-header>>
#+end_src
* Introduction
:PROPERTIES:
:CUSTOM_ID: sec:introduction
:END:
This document demonstrates how to switch between the four different Org LaTeX
export source code block backends ~verbatim~, ~listings~, ~minted~ and
~engraved~. In order to explore a bug in the ~engraved~ backend, the
sub-backends ~plain-engraved~, ~fixed-engraved~, and ~boxed-engraved~ replace
the ~engraved~ backend in the entry point [[ab-do-it]].
Sub-backend ~plain-engraved~ selects Org upstream, sub-backend ~fixed-engraved~
selects a bug work-around, and sub-backend ~boxed-engraved~ selects a bug
amplification which may lead to terrible ~pdf~ output.
Execution of the entry point listing [[ab-do-it]] assumes tangling of this file to
[[./any-backend.el]] and evaluation of [[./any-backend.el]] or installation of
[[./any-backend.el]] by means of ~package-install-from-buffer~.
* Minimal setup :noexport:
:PROPERTIES:
:CUSTOM_ID: sec:minimal-setup
:END:
Listing [[lst:insert-init]] uses ~ab-org-babel-file-as-block-body~ to insert the
contents of [[~/org-emacs/init.el][~/org-emacs/init.el]] into listing [[lst:insert-init-result]].
#+caption[Insert minimal dot-emacs]:
#+caption: Insert minimal dot-emacs.
#+header: :wrap "src emacs-lisp -n :eval never :tangle no"
#+name: lst:insert-init
#+header: :var filename="~/org-emacs/init.el"
#+begin_src emacs-lisp -n :eval no-export :exports both :tangle no
(unless (or (featurep 'any-backend)
(require 'any-backend nil 'noerror))
(user-error "Evaluate or install `any-backend.el' (after tangling?)"))
(ab-org-babel-file-as-block-body filename)
#+end_src
#+caption[Minimal dot-emacs]:
#+caption: Minimal dot-emacs.
#+name: lst:insert-init-result
#+RESULTS: lst:insert-init
#+begin_src emacs-lisp -n :eval never :tangle no
;; Almost everybody should edit the next line.
(push (expand-file-name "~/VCS/org-mode/lisp") load-path)
;; Undo calling `org-ctags-enable'.
(defun org-ctags-disable ()
"Undo calling `org-ctags-enable'."
(put 'org-mode 'find-tag-default-function nil)
(setq org-ctags-enabled-p nil)
(setq org-open-link-functions nil))
(with-eval-after-load 'org-ctags
(org-ctags-disable))
;; `tab'-related options affect `engrave-faces'.
(setopt tab-always-indent 'complete
tab-width 8
tool-bar-mode nil)
(when (eq system-type 'darwin)
(setopt ns-alternate-modifier nil
ns-command-modifier 'meta
ns-right-command-modifier 'super))
;; Ensure to load all relevant `Org' libraries.
(dolist (lib '(org ob-core ob-latex org-src ox-latex))
(require lib))
;; Setting `org-confirm-babel-evaluate' to `nil' is DANGEROUS.
(setopt org-adapt-indention nil
org-confirm-babel-evaluate nil
org-latex-compiler "lualatex"
org-latex-prefer-user-labels t
org-latex-src-block-backend 'engraved)
;; Install a minimum of other packages:
;; `engrave-faces' is absolutely necessary.
;; `auctex' and `pdf-tools' are nice to have.
;; First `pdf-tools' install may fail. FIX: exit Emacs to restart Emacs.
(setopt package-archives '(("gnu" . "https://elpa.gnu.org/packages/")
("gnu-devel" . "https://elpa.gnu.org/devel/")
("melpa" . "https://melpa.org/packages/")
("nongnu" . "https://elpa.nongnu.org/nongnu/"))
package-pinned-packages '((auctex . "gnu")
(engrave-faces . "gnu-devel")
(pdf-tools . "melpa")))
(dolist (pkg '(auctex engrave-faces pdf-tools))
(unless (package-installed-p pkg)
(package-install pkg)))
;; `pdf-tools' has clickable links out of the box, contrary to `docview'.
;; `pdf-loader-install' ensures compilation of the `epdfinfo.c' server.
(when (fboundp 'pdf-loader-install)
(pdf-loader-install))
#+end_src
* LaTeX preamble with page layout and float barriers
:PROPERTIES:
:CUSTOM_ID: sec:latex-preamble
:END:
The geometry in listing [[lst:latex-header]] makes that the line length in all
listings fits within the LaTeX length ~\textwidth~. Listing [[lst:latex-header]]
also introduces float barriers to prevent floating figures and listings from
floating outside their ~[sub-][sub-]sections~.
#+caption[LaTeX preamble with page layout and float barriers]:
#+caption: LaTeX preamble with page layout and float barriers.
#+name: lst:latex-header
#+begin_src latex -n :exports code
% BEGIN: lst:latex-header
\usepackage{biblatex} % LaTeX compilation fails without this package.
% PAGE LAYOUT: https://www.overleaf.com/learn/latex/Page_size_and_margins
\usepackage{geometry}
\usepackage{layout}
\geometry{
a4paper,
total={480pt,680pt},
top=60pt,
left=60pt,
}
% FLOAT BARRIERS:
% https://tex.stackexchange.com/questions/118662/use-placeins-for-subsections
% Make section an implicit float barrier:
\usepackage[section]{placeins}
% Make subsection an implicit float barrier:
\makeatletter
\AtBeginDocument{%
\expandafter\renewcommand\expandafter\subsection\expandafter{%
\expandafter\@fb@secFB\subsection
}%
}
\makeatother
% Make subsubsection an implicit float barrier:
\makeatletter
\AtBeginDocument{%
\expandafter\renewcommand\expandafter\subsubsection\expandafter{%
\expandafter\@fb@secFB\subsubsection
}%
}
% END: lst:latex-header
#+end_src
* Noweb templates
:PROPERTIES:
:CUSTOM_ID: sec:noweb-templates
:END:
Listing [[plain-engraved]], [[fixed-engraved]], [[boxed-engraved]], [[listings]], [[minted]], and
[[verbatim]] are ~noweb~ templates for listing [[ab-do-it]] and [[ab-do-it-result]].
#+caption: Noweb ~plain-engraved~ template.
#+name: plain-engraved
#+begin_src latex -n :exports code
% Backend (PLAIN) ENGRAVED requires no packages.
#+end_src
#+caption: Noweb ~fixed-engraved~ template.
#+name: fixed-engraved
#+begin_src latex -n :exports code
% Backend (FIXED) ENGRAVED requires no packages.
#+end_src
#+caption: Noweb ~boxed-engraved~ template.
#+name: boxed-engraved
#+begin_src latex -n :exports code
% Backend (BOXED) ENGRAVED requires no packages.
#+end_src
#+caption: Noweb ~listings~ template.
#+name: listings
#+begin_src latex -n :exports code
% Source block backend LISTINGS requires two packages.
\usepackage{listings}
\usepackage{color}
#+end_src
#+caption: Noweb ~minted~ template.
#+name: minted
#+begin_src latex -n :exports code
% Backend MINTED requires one package.
\usepackage{minted}
#+end_src
#+caption: Noweb ~verbatim~ template.
#+name: verbatim
#+begin_src latex -n :exports code
% Backend VERBATIM requires no packages.
#+end_src
* Switch backend and explore an ~engraved~ export backend bug
:PROPERTIES:
:CUSTOM_ID: sec:switch-and-explore
:END:
Listing [[ab-header]], [[ab-file-as-body]], [[ab-filter]], [[ab-org-setup]], [[ab-setup]], and
[[defun-ab-do-it]], and [[ab-footer]] tangle into [[./any-backend.el]].
#+caption: Library file header.
#+name: ab-header
#+begin_src emacs-lisp -n :eval never
;;; any-backend.el --- demonstrate any block backend -*- lexical-binding:t -*-
;; Author: Gerard Vermeulen <gerard.vermeulen@posteo.net>
;; Version: 0.0.1
;; 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This file is the tangled output of `any-backend.org' tailored for
;; use with `any-backend.el'. Users should go to the "Export to
;; LaTeX" section of `any-backend.org' and execute the `ab-do-it'
;; source block after evaluation or installation of `any-backend.el'.
;;; Code:
(require 'ox-latex)
#+end_src
#+caption[Copy file contents to an indented source block body]:
#+caption: Copy file contents to an indented source block body.
#+name: ab-file-as-body
#+begin_src emacs-lisp -n :results silent
(defun ab-org-babel-file-as-block-body (filename)
"Copy FILENAME contents to an indented Org Babel source block body."
(when (file-readable-p filename)
(let ((delete-trailing-whitespace t)
(n (if org-src-preserve-indentation
0 org-edit-src-content-indentation)))
(with-temp-buffer
(insert-file-contents filename)
(string-rectangle (point-min) (point-max)
(make-string n ?\s))
(delete-trailing-whitespace (point-min) (point-max))
(buffer-substring (point-min) (point-max))))))
#+end_src
#+caption[Define ~ab-org-latex-engrave-source-block-filter~]:
#+caption: Define a source block filter function.
#+name: ab-filter
#+begin_src emacs-lisp -n :results silent
(defun ab-org-latex-engraved-source-block-filter (data _backend _info)
"Replace \"Code\" with \"Breakable\" in non-floating DATA environments.
Set `org-latex-engraved-preamble' to define a Breakable (non-floating)
environment and an unbreakable Code (floating) environment."
(unless (string-match "^\\\\DeclareTColorBox\\[\\]{Breakable}"
org-latex-engraved-preamble)
(user-error
"`org-latex-engraved-preamble' defines no `Breakable' environment"))
(when (eq org-latex-src-block-backend 'engraved)
;; Transform only blocks matching at position 0. Therefore, do
;; not transform blocks that are listing environments.
(when (string-match "\\`\\\\begin{Code}\n" data)
(setq data (replace-match "\\begin{Breakable}\n" t 'literal data))
(if (string-match "^\\\\end{Code}\n" data)
(setq data (replace-match "\\end{Breakable}\n" t 'literal data))
(error "Match `^\\\\end{Code}' failure")))))
#+end_src
#+caption[Define ~ab-org-latex-setup~.]:
#+caption: Define ~ab-org-latex-setup~.
#+name: ab-org-setup
#+begin_src emacs-lisp -n :results silent
(defun ab-org-latex-setup (how main)
"Set `org-latex-src-block-backend' and `org-latex-toc-command'.
HOW selects the sub-backend and MAIN selects which Org features to use."
(cond
((memq how '(minted plain-engraved fixed-engraved boxed-engraved))
(setq-local
org-latex-toc-command
"\\tableofcontents\\label{toc}\n\\listoflistings\n\\newpage\n"))
((eq how 'listings)
(setq-local
org-latex-toc-command
"\\tableofcontents\\label{toc}\n\\lstlistoflistings\n\\newpage\n"))
((eq how 'verbatim)
(setq-local
org-latex-toc-command
"\\tableofcontents\\label{toc}\n\\listoffigures\\newpage\n"))
(t (user-error "Correct argument `%S' for `ab-setup'" how)))
(if (memq how '(plain-engraved fixed-engraved boxed-engraved))
(setq-local org-latex-src-block-backend 'engraved)
(setq-local org-latex-src-block-backend how))
(if main (setq-local org-latex-packages-alist nil)
(setq-local org-latex-packages-alist
(or (and (eq how 'minted) '(("" "minted")))
(and (eq how 'listings) '(("" "listings")
("" "color")))))))
#+end_src
#+caption[Define ~ab-setup~]:
#+caption: Define ~ab-setup~.
#+caption: *Line 41* depends on ~how~ being ~fixed-engraved~ or ~boxed-engraved~.
#+name: ab-setup
#+begin_src emacs-lisp -n :results silent
(defun ab-setup (how main)
"Set `org-latex-src-block-backend', `org-latex-toc-command',
`org-latex-engraved-preamble', and `org-export-filter-src-block-functions'.
HOW selects the sub-backend and MAIN selects which Org features to use."
(ab-org-latex-setup how main)
(if (memq how '(verbatim listings minted plain-engraved))
(progn (setq-local org-latex-engraved-preamble
(default-toplevel-value 'org-latex-engraved-preamble))
(setq-local org-export-filter-src-block-functions nil))
(setq-local org-latex-engraved-preamble
(format "\\usepackage{fvextra}
[FVEXTRA-SETUP]
%% Make code and line numbers normalsize. Make line numbers grey.
\\renewcommand\\theFancyVerbLine{
\\normalsize\\color{black!40!white}\\arabic{FancyVerbLine}}
%% Do not rely on an eventual call to `engrave-faces-latex-gen-preamble'.
\\usepackage{xcolor}
\\providecolor{EfD}{HTML}{f7f7f7}
\\providecolor{EFD}{HTML}{28292e}
%% Define a breakable Code environment to prettily wrap the fontified code.
\\usepackage[breakable,xparse]{tcolorbox}
\\DeclareTColorBox[]{Breakable}{o}{
colback=EfD, colframe=EFD, colupper=EFD,
fontupper=\\normalsize\\setlength{\\fboxsep}{0pt},
IfNoValueTF={#1}{
boxsep=2pt, arc=2.5pt, outer arc=2.5pt, boxrule=1.0pt
}{
boxsep=2.5pt, arc=0pt, outer arc=0pt, boxrule=0pt, leftrule=1.5pt
},
left=2pt, right=2pt, top=1pt, bottom=0.5pt, breakable
}
%% Define an unbreakable Code environment to fontify code inside floats.
\\DeclareTColorBox[]{Code}{o}{
colback=EfD, colframe=EFD, colupper=EFD,
fontupper=\\normalsize\\setlength{\\fboxsep}{0pt},
IfNoValueTF={#1}{
boxsep=2pt, arc=2.5pt, outer arc=2.5pt, boxrule=1.0pt
}{
boxsep=2.5pt, arc=0pt, outer arc=0pt, boxrule=0pt, leftrule=1pt
},
left=2pt, right=2pt, top=1pt, bottom=1pt, %s
}
[LISTINGS-SETUP]" (or (and (eq how 'fixed-engraved) "unbreakable")
(and (eq how 'boxed-engraved) "breakable")
(user-error "(ab-setup `%S') yells BOOM!" how))))
(setq-local org-export-filter-src-block-functions
'(ab-org-latex-engraved-source-block-filter)))
org-latex-src-block-backend)
#+end_src
#+caption[Define ~ab-select-how-and-export-to-latex~]:
#+caption: Define ~ab-select-how-and-export-to-latex~.
#+name: defun-ab-do-it
#+begin_src emacs-lisp -n :exports code :results silent
;;;###autoload
(defun ab-select-how-and-export-to-latex (main)
"Export Org buffer to LaTeX file after prompting how to export.
In case MAIN is non-nil use org-9.7pre features, or in case MAIN is nil
use org-9.16 features, to export to LaTeX.
The `engraved' source block export backend may lead to defects in
compiled `pdf' for floating listings where vertical line spacing may not
be constant. Option `plain-engraved' selects Org upstream, option
`fixed-engraved' selects a bug work-around, and option `boxed-engraved'
selects a bug amplification which may lead to terrible `pdf' output.
The other choices are `verbatim', `listings', and `minted' to select the
other backends."
(interactive)
(let ((how
(intern-soft
(completing-read
"How: " '(plain-engraved fixed-engraved boxed-engraved
verbatim listings minted)
nil t)))
(seconds 1))
(ab-setup how main)
(run-with-timer seconds nil #'org-latex-export-to-latex)
(if main
(format "#+latex_header: <<%s>>" how)
(format "%% %s" how))))
#+end_src
#+caption[Library file footer]:
#+caption: Library file footer.
#+name: ab-footer
#+begin_src emacs-lisp -n :eval never
(provide 'any-backend)
;;; any-backend.el ends here
#+end_src
* Export to LaTeX
:PROPERTIES:
:CUSTOM_ID: sec:any-backend-usage
:END:
Originally, I had written this document to explore ~noweb~, but that exposed a
bug fixed since ~2024-02-05~. Execution of the listing [[ab-do-it]] source block
uses ~noweb~ in case of setting "~:var main='t~" in this source block and
execution of the listing [[ab-do-it]] source block does not use ~noweb~ in case of
setting "~:var main='nil~". The latter setting has the effect of exporting the
body of listing [[ab-do-it-result]].
#+caption[Call ~ab-select-how-and-export-to-latex~]:
#+caption: Call ~ab-select-how-and-export-to-latex~.
#+name: ab-do-it
#+header: :var main='nil
#+header: :wrap "src latex -n :exports both :noweb yes :results raw"
#+begin_src emacs-lisp -n :exports both :results raw :eval no-export :tangle no
(unless (or (featurep 'any-backend)
(require 'any-backend nil 'noerror))
(user-error "Evaluate or install `any-backend.el' (after tangling?)"))
(ab-select-how-and-export-to-latex main)
#+end_src
#+caption[Run ~ab-select-how-and-export-to-latex~ result]:
#+caption: Run ~ab-select-how-and-export-to-latex~ result.
#+name: ab-do-it-result
#+RESULTS: ab-do-it
#+begin_src latex -n :exports both :noweb yes :results raw
% plain-engraved
#+end_src
#+RESULTS: ab-do-it-result
#+latex_header: % Backend (PLAIN) ENGRAVED requires no packages.
* Make never "broken" non-floating listing
:PROPERTIES:
:CUSTOM_ID: sec:make-non-floating-listing
:END:
#+caption[Insert ~any-backend.el~]:
#+caption: Insert ~any-backend.el~.
#+header: :wrap "src emacs-lisp -n :eval never :tangle no"
#+name: insert-non-float
#+header: :var filename="any-backend.el"
#+begin_src emacs-lisp -n :eval no-export :exports both :tangle no
(unless (or (featurep 'any-backend)
(require 'any-backend nil 'noerror))
(user-error "Evaluate or install `any-backend.el' (after tangling?)"))
(ab-org-babel-file-as-block-body filename)
#+end_src
** List never "broken" non-floating listing
:PROPERTIES:
:CUSTOM_ID: sec:list-non-floating-listing
:END:
The next non-floating listing occupies a space of more than two pages.
#+name: list-non-float-result
#+RESULTS: insert-non-float
#+begin_src emacs-lisp -n :eval never :tangle no
;;; any-backend.el --- demonstrate any block backend -*- lexical-binding:t -*-
;; Author: Gerard Vermeulen <gerard.vermeulen@posteo.net>
;; Version: 0.0.1
;; 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This file is the tangled output of `any-backend.org' tailored for
;; use with `any-backend.el'. Users should go to the "Export to
;; LaTeX" section of `any-backend.org' and execute the `ab-do-it'
;; source block after evaluation or installation of `any-backend.el'.
;;; Code:
(require 'ox-latex)
(defun ab-org-babel-file-as-block-body (filename)
"Copy FILENAME contents to an indented Org Babel source block body."
(when (file-readable-p filename)
(let ((delete-trailing-whitespace t)
(n (if org-src-preserve-indentation
0 org-edit-src-content-indentation)))
(with-temp-buffer
(insert-file-contents filename)
(string-rectangle (point-min) (point-max)
(make-string n ?\s))
(delete-trailing-whitespace (point-min) (point-max))
(buffer-substring (point-min) (point-max))))))
(defun ab-org-latex-engraved-source-block-filter (data _backend _info)
"Replace \"Code\" with \"Breakable\" in non-floating DATA environments.
Set `org-latex-engraved-preamble' to define a Breakable (non-floating)
environment and an unbreakable Code (floating) environment."
(unless (string-match "^\\\\DeclareTColorBox\\[\\]{Breakable}"
org-latex-engraved-preamble)
(user-error
"`org-latex-engraved-preamble' defines no `Breakable' environment"))
(when (eq org-latex-src-block-backend 'engraved)
;; Transform only blocks matching at position 0. Therefore, do
;; not transform blocks that are listing environments.
(when (string-match "\\`\\\\begin{Code}\n" data)
(setq data (replace-match "\\begin{Breakable}\n" t 'literal data))
(if (string-match "^\\\\end{Code}\n" data)
(setq data (replace-match "\\end{Breakable}\n" t 'literal data))
(error "Match `^\\\\end{Code}' failure")))))
(defun ab-org-latex-setup (how main)
"Set `org-latex-src-block-backend' and `org-latex-toc-command'.
HOW selects the sub-backend and MAIN selects which Org features to use."
(cond
((memq how '(minted plain-engraved fixed-engraved boxed-engraved))
(setq-local
org-latex-toc-command
"\\tableofcontents\\label{toc}\n\\listoflistings\n\\newpage\n"))
((eq how 'listings)
(setq-local
org-latex-toc-command
"\\tableofcontents\\label{toc}\n\\lstlistoflistings\n\\newpage\n"))
((eq how 'verbatim)
(setq-local
org-latex-toc-command
"\\tableofcontents\\label{toc}\n\\listoffigures\\newpage\n"))
(t (user-error "Correct argument `%S' for `ab-setup'" how)))
(if (memq how '(plain-engraved fixed-engraved boxed-engraved))
(setq-local org-latex-src-block-backend 'engraved)
(setq-local org-latex-src-block-backend how))
(if main (setq-local org-latex-packages-alist nil)
(setq-local org-latex-packages-alist
(or (and (eq how 'minted) '(("" "minted")))
(and (eq how 'listings) '(("" "listings")
("" "color")))))))
(defun ab-setup (how main)
"Set `org-latex-src-block-backend', `org-latex-toc-command',
`org-latex-engraved-preamble', and `org-export-filter-src-block-functions'.
HOW selects the sub-backend and MAIN selects which Org features to use."
(ab-org-latex-setup how main)
(if (memq how '(verbatim listings minted plain-engraved))
(progn (setq-local org-latex-engraved-preamble
(default-toplevel-value 'org-latex-engraved-preamble))
(setq-local org-export-filter-src-block-functions nil))
(setq-local org-latex-engraved-preamble
(format "\\usepackage{fvextra}
[FVEXTRA-SETUP]
%% Make code and line numbers normalsize. Make line numbers grey.
\\renewcommand\\theFancyVerbLine{
\\normalsize\\color{black!40!white}\\arabic{FancyVerbLine}}
%% Do not rely on an eventual call to `engrave-faces-latex-gen-preamble'.
\\usepackage{xcolor}
\\providecolor{EfD}{HTML}{f7f7f7}
\\providecolor{EFD}{HTML}{28292e}
%% Define a breakable Code environment to prettily wrap the fontified code.
\\usepackage[breakable,xparse]{tcolorbox}
\\DeclareTColorBox[]{Breakable}{o}{
colback=EfD, colframe=EFD, colupper=EFD,
fontupper=\\normalsize\\setlength{\\fboxsep}{0pt},
IfNoValueTF={#1}{
boxsep=2pt, arc=2.5pt, outer arc=2.5pt, boxrule=1.0pt
}{
boxsep=2.5pt, arc=0pt, outer arc=0pt, boxrule=0pt, leftrule=1.5pt
},
left=2pt, right=2pt, top=1pt, bottom=0.5pt, breakable
}
%% Define an unbreakable Code environment to fontify code inside floats.
\\DeclareTColorBox[]{Code}{o}{
colback=EfD, colframe=EFD, colupper=EFD,
fontupper=\\normalsize\\setlength{\\fboxsep}{0pt},
IfNoValueTF={#1}{
boxsep=2pt, arc=2.5pt, outer arc=2.5pt, boxrule=1.0pt
}{
boxsep=2.5pt, arc=0pt, outer arc=0pt, boxrule=0pt, leftrule=1pt
},
left=2pt, right=2pt, top=1pt, bottom=1pt, %s
}
[LISTINGS-SETUP]" (or (and (eq how 'fixed-engraved) "unbreakable")
(and (eq how 'boxed-engraved) "breakable")
(user-error "(ab-setup `%S') yells BOOM!" how))))
(setq-local org-export-filter-src-block-functions
'(ab-org-latex-engraved-source-block-filter)))
org-latex-src-block-backend)
;;;###autoload
(defun ab-select-how-and-export-to-latex (main)
"Export Org buffer to LaTeX file after prompting how to export.
In case MAIN is non-nil use org-9.7pre features, or in case MAIN is nil
use org-9.16 features, to export to LaTeX.
The `engraved' source block export backend may lead to defects in
compiled `pdf' for floating listings where vertical line spacing may not
be constant. Option `plain-engraved' selects Org upstream, option
`fixed-engraved' selects a bug work-around, and option `boxed-engraved'
selects a bug amplification which may lead to terrible `pdf' output.
The other choices are `verbatim', `listings', and `minted' to select the
other backends."
(interactive)
(let ((how
(intern-soft
(completing-read
"How: " '(plain-engraved fixed-engraved boxed-engraved
verbatim listings minted)
nil t)))
(seconds 1))
(ab-setup how main)
(run-with-timer seconds nil #'org-latex-export-to-latex)
(if main
(format "#+latex_header: <<%s>>" how)
(format "%% %s" how))))
(provide 'any-backend)
;;; any-backend.el ends here
#+end_src
The previous non-floating listing occupies a space of more than two pages.
* Conclusion: summary of constraints and limitations
:PROPERTIES:
:CUSTOM_ID: sec:conclusion
:END:
1. Placement of floating listings:
- It is impossible to have more than three floating listings on a page,
neither with ~minted~ nor with ~engraved~.
- Float barriers help to control the placement of floating listing.
- Mixing floating and non-floating listings in the same ~[sub-][sub-]section~
gives visually weird results: floating listings may float between the parts
of non-floating listings.
2. Table of contents:
- the ~verbatim~ backend produces a "List of Figures" instead of a "List of
Listings".
3. Sub-backend ~plain-engraved~ moving target defects:
- Listing [[plain-engraved]] is in a botched state.
- Listing [[ab-filter]] shows too much vertical spacing after line 13.
- Listing [[ab-org-setup]] shows too much vertical spacing after line 13.
- Listing [[ab-setup]] shows too much vertical spacing after line 13, 26, and 39.
- Listing [[defun-ab-do-it]] shows too much vertical spacing after line 13.
4. Sub-backend ~boxed-engraved~ moving target defects:
- Listing [[ab-org-setup]] shows too much vertical spacing after line 19.
- Listing [[ab-setup]] shows too much vertical spacing after line 19, and 38.
- Listing [[defun-ab-do-it]] shows too much vertical spacing after line 19.
*Fixing ~engraved~ requires:*
1. ~unbreakable~ floating listings.
2. ~\normalsize~ font size.
3. visible boxes.
Points (2) and (3) are unacceptable, IMO.
# Emacs looks for "Local variables:" after the last "newline-formfeed".
\f
# Local Variables:
# compile-command: "latexmk -interaction=nonstopmode -lualatex -pvc -shell-escape any-backend.tex"
# fill-column: 80
# org-edit-src-content-indentation: 2
# End:
[-- Attachment #3: any-backend.el --]
[-- Type: application/octet-stream, Size: 6886 bytes --]
;;; any-backend.el --- demonstrate any block backend -*- lexical-binding:t -*-
;; Author: Gerard Vermeulen <gerard.vermeulen@posteo.net>
;; Version: 0.0.1
;; 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This file is the tangled output of `any-backend.org' tailored for
;; use with `any-backend.el'. Users should go to the "Export to
;; LaTeX" section of `any-backend.org' and execute the `ab-do-it'
;; source block after evaluation or installation of `any-backend.el'.
;;; Code:
(require 'ox-latex)
(defun ab-org-babel-file-as-block-body (filename)
"Copy FILENAME contents to an indented Org Babel source block body."
(when (file-readable-p filename)
(let ((delete-trailing-whitespace t)
(n (if org-src-preserve-indentation
0 org-edit-src-content-indentation)))
(with-temp-buffer
(insert-file-contents filename)
(string-rectangle (point-min) (point-max)
(make-string n ?\s))
(delete-trailing-whitespace (point-min) (point-max))
(buffer-substring (point-min) (point-max))))))
(defun ab-org-latex-engraved-source-block-filter (data _backend _info)
"Replace \"Code\" with \"Breakable\" in non-floating DATA environments.
Set `org-latex-engraved-preamble' to define a Breakable (non-floating)
environment and an unbreakable Code (floating) environment."
(unless (string-match "^\\\\DeclareTColorBox\\[\\]{Breakable}"
org-latex-engraved-preamble)
(user-error
"`org-latex-engraved-preamble' defines no `Breakable' environment"))
(when (eq org-latex-src-block-backend 'engraved)
;; Transform only blocks matching at position 0. Therefore, do
;; not transform blocks that are listing environments.
(when (string-match "\\`\\\\begin{Code}\n" data)
(setq data (replace-match "\\begin{Breakable}\n" t 'literal data))
(if (string-match "^\\\\end{Code}\n" data)
(setq data (replace-match "\\end{Breakable}\n" t 'literal data))
(error "Match `^\\\\end{Code}' failure")))))
(defun ab-org-latex-setup (how main)
"Set `org-latex-src-block-backend' and `org-latex-toc-command'.
HOW selects the sub-backend and MAIN selects which Org features to use."
(cond
((memq how '(minted plain-engraved fixed-engraved boxed-engraved))
(setq-local
org-latex-toc-command
"\\tableofcontents\\label{toc}\n\\listoflistings\n\\newpage\n"))
((eq how 'listings)
(setq-local
org-latex-toc-command
"\\tableofcontents\\label{toc}\n\\lstlistoflistings\n\\newpage\n"))
((eq how 'verbatim)
(setq-local
org-latex-toc-command
"\\tableofcontents\\label{toc}\n\\listoffigures\\newpage\n"))
(t (user-error "Correct argument `%S' for `ab-setup'" how)))
(if (memq how '(plain-engraved fixed-engraved boxed-engraved))
(setq-local org-latex-src-block-backend 'engraved)
(setq-local org-latex-src-block-backend how))
(if main (setq-local org-latex-packages-alist nil)
(setq-local org-latex-packages-alist
(or (and (eq how 'minted) '(("" "minted")))
(and (eq how 'listings) '(("" "listings")
("" "color")))))))
(defun ab-setup (how main)
"Set `org-latex-src-block-backend', `org-latex-toc-command',
`org-latex-engraved-preamble', and `org-export-filter-src-block-functions'.
HOW selects the sub-backend and MAIN selects which Org features to use."
(ab-org-latex-setup how main)
(if (memq how '(verbatim listings minted plain-engraved))
(progn (setq-local org-latex-engraved-preamble
(default-toplevel-value 'org-latex-engraved-preamble))
(setq-local org-export-filter-src-block-functions nil))
(setq-local org-latex-engraved-preamble
(format "\\usepackage{fvextra}
[FVEXTRA-SETUP]
%% Make code and line numbers normalsize. Make line numbers grey.
\\renewcommand\\theFancyVerbLine{
\\normalsize\\color{black!40!white}\\arabic{FancyVerbLine}}
%% Do not rely on an eventual call to `engrave-faces-latex-gen-preamble'.
\\usepackage{xcolor}
\\providecolor{EfD}{HTML}{f7f7f7}
\\providecolor{EFD}{HTML}{28292e}
%% Define a breakable Code environment to prettily wrap the fontified code.
\\usepackage[breakable,xparse]{tcolorbox}
\\DeclareTColorBox[]{Breakable}{o}{
colback=EfD, colframe=EFD, colupper=EFD,
fontupper=\\normalsize\\setlength{\\fboxsep}{0pt},
IfNoValueTF={#1}{
boxsep=2pt, arc=2.5pt, outer arc=2.5pt, boxrule=1.0pt
}{
boxsep=2.5pt, arc=0pt, outer arc=0pt, boxrule=0pt, leftrule=1.5pt
},
left=2pt, right=2pt, top=1pt, bottom=0.5pt, breakable
}
%% Define an unbreakable Code environment to fontify code inside floats.
\\DeclareTColorBox[]{Code}{o}{
colback=EfD, colframe=EFD, colupper=EFD,
fontupper=\\normalsize\\setlength{\\fboxsep}{0pt},
IfNoValueTF={#1}{
boxsep=2pt, arc=2.5pt, outer arc=2.5pt, boxrule=1.0pt
}{
boxsep=2.5pt, arc=0pt, outer arc=0pt, boxrule=0pt, leftrule=1pt
},
left=2pt, right=2pt, top=1pt, bottom=1pt, %s
}
[LISTINGS-SETUP]" (or (and (eq how 'fixed-engraved) "unbreakable")
(and (eq how 'boxed-engraved) "breakable")
(user-error "(ab-setup `%S') yells BOOM!" how))))
(setq-local org-export-filter-src-block-functions
'(ab-org-latex-engraved-source-block-filter)))
org-latex-src-block-backend)
;;;###autoload
(defun ab-select-how-and-export-to-latex (main)
"Export Org buffer to LaTeX file after prompting how to export.
In case MAIN is non-nil use org-9.7pre features, or in case MAIN is nil
use org-9.16 features, to export to LaTeX.
The `engraved' source block export backend may lead to defects in
compiled `pdf' for floating listings where vertical line spacing may not
be constant. Option `plain-engraved' selects Org upstream, option
`fixed-engraved' selects a bug work-around, and option `boxed-engraved'
selects a bug amplification which may lead to terrible `pdf' output.
The other choices are `verbatim', `listings', and `minted' to select the
other backends."
(interactive)
(let ((how
(intern-soft
(completing-read
"How: " '(plain-engraved fixed-engraved boxed-engraved
verbatim listings minted)
nil t)))
(seconds 1))
(ab-setup how main)
(run-with-timer seconds nil #'org-latex-export-to-latex)
(if main
(format "#+latex_header: <<%s>>" how)
(format "%% %s" how))))
(provide 'any-backend)
;;; any-backend.el ends here
[-- Attachment #4: any-backend.pdf --]
[-- Type: application/pdf, Size: 85057 bytes --]
[-- Attachment #5: 0001-Unacceptable-engraved-backend-fix.patch --]
[-- Type: application/octet-stream, Size: 3924 bytes --]
From 211db75966232616e43af55672edd78d114172e0 Mon Sep 17 00:00:00 2001
From: Gerard Vermeulen <gerard.vermeulen@posteo.net>
Date: Wed, 14 Feb 2024 18:41:42 +0100
Subject: [PATCH] Unacceptable engraved backend fix
This fixes the unbreakable/breakable for floating/non-floating
listings, but it also requires normalsize font size and visible boxes
around the listings. This makes the patch unacceptable for general
use.
---
lisp/ox-latex.el | 35 ++++++++++++++++++++---------------
1 file changed, 20 insertions(+), 15 deletions(-)
diff --git a/lisp/ox-latex.el b/lisp/ox-latex.el
index cfa2b8178..6bffe7f1c 100644
--- a/lisp/ox-latex.el
+++ b/lisp/ox-latex.el
@@ -1190,7 +1190,8 @@ will produce
[FVEXTRA-SETUP]
% Make line numbers smaller and grey.
-\\renewcommand\\theFancyVerbLine{\\footnotesize\\color{black!40!white}\\arabic{FancyVerbLine}}
+\\renewcommand\\theFancyVerbLine{
+ \\normalsize\\color{black!40!white}\\arabic{FancyVerbLine}}
\\usepackage{xcolor}
@@ -1200,17 +1201,13 @@ will produce
% Define a Code environment to prettily wrap the fontified code.
\\usepackage[breakable,xparse]{tcolorbox}
-\\DeclareTColorBox[]{Code}{o}%
-{colback=EfD!98!EFD, colframe=EfD!95!EFD,
- fontupper=\\footnotesize\\setlength{\\fboxsep}{0pt},
- colupper=EFD,
- IfNoValueTF={#1}%
- {boxsep=2pt, arc=2.5pt, outer arc=2.5pt,
- boxrule=0.5pt, left=2pt}%
- {boxsep=2.5pt, arc=0pt, outer arc=0pt,
- boxrule=0pt, leftrule=1.5pt, left=0.5pt},
- right=2pt, top=1pt, bottom=0.5pt,
- breakable}
+\\DeclareTColorBox[]{Code}{s}{
+ colback=EfD, colframe=EFD, colupper=EFD,
+ fontupper=\\normalsize\\setlength{\\fboxsep}{0pt},
+ boxsep=2pt, arc=2.5pt, outer arc=2.5pt, boxrule=0.5pt,
+ IfNoValueTF={#1}{unbreakable}{breakable},
+ left=2pt, right=2pt, top=1pt, bottom=0.5pt
+}
[LISTINGS-SETUP]"
"Preamble content injected when using engrave-faces-latex for source blocks.
@@ -3530,13 +3527,18 @@ and FLOAT are extracted from SRC-BLOCK and INFO in `org-latex-src-block'."
(when (eq mathescape 'yes)
(or engrave-faces-latex-mathescape t)))))
-(defun org-latex-src--engrave-code (content lang &optional theme options inline)
+(defun org-latex-src--engrave-code
+ (content lang &optional theme options inline caption)
"Engrave CONTENT to LaTeX in a LANG-mode buffer, and give the result.
When the THEME symbol is non-nil, that theme will be used.
When INLINE is nil, a Verbatim environment wrapped in a Code
environment will be used. When t, a Verb command will be used.
+When CAPTION is nil, make a breakable Code environment for non-floating
+listings. Otherwise, make an unbreakable Code environment for floating
+listings.
+
When OPTIONS is provided, as either a string or list of key-value
pairs accepted by `org-latex--make-option-string', it is passed
to the Verbatim environment or Verb command."
@@ -3568,7 +3570,10 @@ to the Verbatim environment or Verb command."
(engraved-wrapped
(if inline
(concat "\\Verb" engraved-options "{" engraved-code "}")
- (concat "\\begin{Code}\n\\begin{Verbatim}" engraved-options "\n"
+ ;; IME, only caption determines float or non-float.
+ (concat (if caption "\\begin{Code}\n\\begin{Verbatim}"
+ "\\begin{Code}*\n\\begin{Verbatim}")
+ engraved-options "\n"
engraved-code "\n\\end{Verbatim}\n\\end{Code}"))))
(kill-buffer engraved-buffer)
(if theme
@@ -3637,7 +3642,7 @@ and FLOAT are extracted from SRC-BLOCK and INFO in `org-latex-src-block'."
(org-latex-src--engrave-code
content lang
(when engraved-theme (intern engraved-theme))
- options))))
+ options nil caption))))
(concat (car float-env) body (cdr float-env))))
(cl-defun org-latex-src-block--listings
--
2.42.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
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Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-02-15 9:18 [BUG]: elusive vertical white-space errors in engraved source block export gerard.vermeulen
2024-02-20 8:04 ` Ihor Radchenko
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