Merge dba0296939 into 3e602fa71f

Michal will update tex4ht ditribution... this will eventually make it to
texlive then to the CI server and it will break.  Adding his comment in
the code so we know.

book/history/sourdough-history.tex

@@ -204,7 +204,7 @@ the process of alcoholic fermentation. He would prove that
 yeast microorganisms are the reason for alcoholic fermentation
 and not other chemical catalysts. He continued with his research and
 was the first person to isolate and grow pure yeast strains.
-Soon later in \num{1868} in the Fleischmann brothers Charles
+Soon later in \num{1868} the Fleischmann brothers Charles
 and Maximilian were the first to patent pure yeast strains
 for bread making. The yeasts offered
 were isolated from batches of sourdough. By \num{1879} the machinery was built

book/pgfsys-dvisvgm4ht.def

@@ -0,0 +1,75 @@
+% Copyright 2021-2024 by Michal Hoftich
+% Copyright 2006 by Till Tantau
+%
+% This file may be distributed and/or modified
+%
+% 1. under the LaTeX Project Public License and/or
+% 2. under the GNU Public License.
+%
+% See the file doc/generic/pgf/licenses/LICENSE for more details.
+
+\ProvidesFileRCS{pgfsys-dvisvgm4ht.def}
+
+% Driver commands for tex4ht
+
+%
+% Load common pdf commands:
+%
+
+% we switched to dvisvgm driver by default. it supports patterns and other features 
+% dvips driver is available through the tikz+ option. It doesn't support everything, 
+% but it worked better with nested pictures in the past.
+\ifdefined\ifOption
+\ifOption{tikz+}{\input pgfsys-dvips.def}{\input pgfsys-dvisvgm.def}
+\else
+% load the dvips driver by default
+\input pgfsys-dvisvgm.def
+\fi
+
+
+\catcode`\:=11%
+
+% we must call most of these redefinitions in \AtBeginDocument, because \HLet is available 
+% only at that moment
+\AtBeginDocument{%
+ % configure the output picture format to svg, as it will require dvisvgm
+ % post processing. 
+ \Configure{Picture}{.svg}%
+
+ % insert picture hooks to pgfsys commands 
+ % these redefinitions are usually called only with the \tikz command, 
+ % they are ignored in tikzpicture environment
+ \def\:tempa#1{%
+     \texfourht@tikz@begin%
+     \csname o:pgfsys@typesetpicturebox:\endcsname{#1}
+     \texfourht@tikz@end%
+ }
+ \HLet\pgfsys@typesetpicturebox\:tempa
+
+ % we must remove Picture-alt in \pgfsys@beginpicture, because it can result in alt text included in the image
+ \def\:tempa{\Configure{Picture-alt}{}\texfourht@tikz@begin\o:pgfsys@beginpicture:}
+ \HLet\pgfsys@beginpicture\:tempa
+ \let\o:pgfsys@endpicture:\pgfsys@endpicture
+ \def\:tempa{\o:pgfsys@endpicture:}
+ \HLet\pgfsys@endpicture\:tempa
+
+ %  start picture around TikZ and PGF environments
+ \ConfigureEnv{tikzpicture}{\begingroup\texfourht@tikz@begin}{\texfourht@tikz@end\endgroup}{}{}%
+ \ConfigureEnv{pgfpicture}{\begingroup\texfourht@tikz@begin}{\texfourht@tikz@end\endgroup}{}{}%
+}
+
+\def\texfourht@tikz@begin{
+  \protect\csname nested:math\endcsname% support display math
+  \Picture*[\csname a:Picture-alt\endcsname]{}%
+}
+\def\texfourht@tikz@end{\EndPicture}
+
+\catcode`\:=12%
+
+
+\endinput
+
+
+%%% Local Variables:
+%%% mode: latex
+%%% End:

book/sourdough-starter/sourdough-starter.tex

@@ -1,6 +1,15 @@
 \chapter{Making a sourdough starter}%
 \label{chapter:sourdough-starter}
 \begin{quoting}
+
+\begin{figure}[!htb]
+  \centering
+  \includegraphics[width=\textwidth]{sourdough-starter-activity-indicators}
+  \caption[Very active sourdough]{A very active sourdough starter shown by the
+      bubbles in the dough.}%
+  \label{fig:sourdough-starter}
+\end{figure}
+
 In this chapter you will learn how to make your
 own sourdough starter, but before doing so you will
 quickly learn about baker's math. Don't worry,
@@ -12,6 +21,8 @@ your starter's readiness, as well as
 how to prepare your starter for long-term storage.
 \end{quoting}
 
+%\iffalse
+
 \section{Baker's math}%
 \label{section:bakers-math}
 
@@ -80,20 +91,23 @@ hungry family arrives. You are tasked with making pasta
 for \num{20} people. How would you calculate the amount of sauce
 you need? You go to the internet and check a recipe and then
 are completely lost when trying to scale it up.
+% \fi
 
 \section{The process of making a starter}
 
-\begin{figure}[!htb]
-  \centering
-  \includegraphics[width=\textwidth]{sourdough-starter-activity-indicators}
-  \caption[Very active sourdough]{A very active sourdough starter shown by the
-      bubbles in the dough.}%
-  \label{fig:sourdough-starter}
-\end{figure}
-
 Making a sourdough starter is very easy, all you need
 is a little bit of patience. It is in fact so easy that it can be summarized
-in a simple flowchart~\ref{fig:sourdough-starter-process} The flour you should
+in a simple flowchart~\ref{fig:sourdough-starter-process}.
+
+\begin{flowchart}[!htb]
+\centering
+  \input{figures/fig-starter-process.tex}
+  \caption[The full sourdough starter process]{The process of making a sourdough
+      starter from scratch.}%
+  \label{fig:sourdough-starter-process}
+\end{flowchart}
+
+The flour you should
 use to bootstrap your starter is ideally a whole flour.
 You could use whole-wheat, whole-rye, whole-spelt or
 any other flour you have. In fact gluten free flours such
@@ -131,14 +145,6 @@ not airtight. You still want some gas exchange to be possible.
 I~like to use a glass and place another
 inverted one on top.
 
-\begin{flowchart}[!htb]
-\centering
-  \input{figures/fig-starter-process.tex}
-  \caption[The full sourdough starter process]{The process of making a sourdough
-      starter from scratch.}%
-  \label{fig:sourdough-starter-process}
-\end{flowchart}
-
 Now an epic battle begins. In one study~\cite{yeasts+biocontrol+agent}
 scientists have identified more than \num{150}~different yeast species living
 on a single leaf of a plant.
@@ -147,6 +153,14 @@ the upper hand in this battle. Other pathogens such as mold
 are also being activated as we added water. Only the strongest
 most adaptable microorganisms will survive.
 
+\begin{figure}[!htb]
+  \includegraphics[width=\textwidth]{sourdough-starter-microbial-war-i}
+  \caption[Microbial warfare during sourdough early days]{A simple
+      visualization of the microbial warfare that happens during the early days of making of
+      a sourdough starter.}
+  \label{fig:sourdough-starter-microbial-war-i}
+\end{figure}
+
 By adding water to the
 flour the starches start to degrade. The seedling tries to
 sprout but it no longer can. Essential for this process is the
@@ -188,20 +202,6 @@ days my new starter seems to be quite alive already. This might
 be due to previous contamination of flour fermenting microbes in
 my kitchen.
 
-\begin{figure}[!htb]
-  \includegraphics[width=\textwidth]{sourdough-starter-microbial-war}
-  \caption[Microbial warfare during sourdough early days]{A simple
-      visualization of the microbial warfare that happens during the making of
-      a sourdough starter. The wild spores on the plant and flour become
-      activated the moment flour and water is mixed.  Only the most adapted
-      flour-fermenting microbes will survive. Because of unwanted microbial
-      fermentation it is advised to discard the feeding-leftovers of the first
-      days. The surviving yeast and bacteria continuously try to outcompete
-      each other for resources. New microbes have a hard time entering the
-      starter and are eliminated.}%
-  \label{fig:sourdough-starter-microbial-war}
-\end{figure}
-
 Wait for around 24~hours and observe what happens to your starter.
 You might see some early signs of fermentation already. Use your nose
 to smell the dough. Look for bubbles in the dough. Your dough
@@ -252,6 +252,14 @@ great option if the starter was accidentally depleted. A practical approach
 is to store all discard in a single jar in the fridge, adding new discard on
 top as needed and using it whenever required.}
 
+\begin{figure}[!htb]
+  \includegraphics[width=\textwidth]{sourdough-starter-microbial-war-ii}
+  \caption[Microbial warfare during sourdough later days]{A simple
+      visualization of the microbial warfare that happens during the later days of making of
+      a sourdough starter.}
+  \label{fig:sourdough-starter-microbial-war-ii}
+\end{figure}
+
 You should hopefully again see some bubbles, the starter increasing
 in size and/or the starter changing its smell. Some people give
 up after the second or third day, because the signs might no longer

book/tex4ebook.cfg

@@ -19,4 +19,27 @@
     font-family: 'Open Sans';
   }
 </style>}}
+
+% Deal with chemical equations in a single svg
+\ExplSyntaxOn
+\def\standaloneenv#1{}
+\pend:def\schemestart{\Picture+{}}
+\append:def\CF_schemestop{\EndPicture}
+\ExplSyntaxOff
+\makeatletter
+\def\texfourht@tikz@begin{
+  \protect\csname nested:math\endcsname% support display math
+  \Picture+[\csname a:Picture-alt\endcsname]{}%
+}
+\makeatother
+
+% Warnig from Michal: Note that once you get the updated TeX Live with a new
+% `chemfig.4ht` file, you can remove this from the config file:
+%
+%```latex \pend:def\schemestart{\Picture+{}}
+%\append:def\CF_schemestop{\EndPicture} ```
+%
+%You could get an error otherwise, as there would be nested `\Picture+{}` and
+%`\EndPicture` commands.
+
 \EndPreamble

book/website.cfg

@@ -47,5 +47,17 @@
 }
 \ConfigureToc{loc}{\HCode{<span class="lofToc">}}{\ }{}{\HCode{</span><br />}}
 
+\ExplSyntaxOn
+\def\standaloneenv#1{}
+\pend:def\schemestart{\Picture+{}}
+\append:def\CF_schemestop{\EndPicture}
+\ExplSyntaxOff
+\makeatletter
+\def\texfourht@tikz@begin{
+  \protect\csname nested:math\endcsname% support display math
+  \Picture+[\csname a:Picture-alt\endcsname]{}%
+}
+\makeatother
+
 \begin{document}
 \EndPreamble