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+% Copyright 2019 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-tex4ht.def}
+
+
+
+% Driver commands for tex4ht
+
+%
+% Load common pdf commands:
+%
+\input pgfsys-common-svg.def
+
+%
+% tex4ht-specific stuff:
+%
+\def\pgfsys@invoke#1{\pgf@sys@fail{svg code in preamble}}
+\def\pgfsys@body@invoke#1{\HCode{#1}}
+
+\newcount\pgf@sys@svg@picnum
+
+\def\pgfsys@pictureboxsynced#1{%
+ \pgfsys@beginscope\pgflowlevelsynccm\box#1\pgfsys@endscope%
+}
+
+
+%%
+%% initial support of Mathml and xhtml inside svg through the svg:foreignelement tag
+%%
+%% it'll allow us to have complicated text nodes in the tex4ht driver
+%%
+
+
+%Example (to improve the display, you have to use css)
+%
+%\tikzpicture[svg text only=false]
+%\draw (0,0) node[inner sep=0pt,draw] {tight}
+%(0cm,2em) node[inner sep=5pt,draw] {loose}
+%(0cm,4em) node[fill=red!20] {default};
+%\draw (3,0) node[inner sep=0pt,draw] {TIGHT}
+%(3cm,2em) node[inner sep=5pt,draw] {LOOSE}
+%(3cm,4em) node[fill=red!20] {DEFAULT};
+%\draw (6,0) node[inner sep=0pt,draw] {$tight$}
+%(6cm,2em) node[inner sep=5pt,draw] {$loose$}
+%(6cm,4em) node[fill=red!20] {$default$};
+%\draw (9,0) node[inner sep=0pt,draw] {$TIGHT$}
+%(9cm,2em) node[inner sep=5pt,draw] {$LOOSE$}
+%(9cm,4em) node[fill=red!20] {$Default$};
+%\endtikzpicture
+%
+% you can use the options "svg text css=filename", "svg text id=idname", "svg text class=classname" to customize the display through the use of css
+%
+
+
+
+
+
+
+
+%\def\pgfsys@beginpicture{%
+% % \Configure{[]}{$}{$} these two lines aren't needed for tex4ht and moreother they produce errors with plain tex !
+% % \Configure{()}{$}{$}
+% \Configure{$$}{}{}{}%$$
+% \Configure{$}{}{}{}%$
+% \Configure{SUB}{\HCode{<tspan baseline-shift="sub">}}{\HCode{</tspan>}}
+% \Configure{SUP}{\HCode{<tspan baseline-shift="sub">}}{\HCode{</tspan>}}
+% \Configure{SUBSUP}{}{}{}
+% \Configure{htf}
+% {0}{+}{<tspan font-family="}
+% {\%s}{" font-size="\%s}{}{}
+% {">}{</tspan>}
+%}
+
+
+
+%\def\pgfsys@endpicture{%
+% % undo:
+% \Configure{htf}{0}{+}{<span\Hnewline
+% class="}{\%s}{-\%s}{x-x-\%d}{}{">}{</span>}
+%}
+
+\def\pgfsys@svg@newline{^^J}
+
+% we don't want tex4ht putting <p> and </p> tags automatically in our svg code and causing invalid xhtml in our svg pictures
+\newif\ifpgfsys@CssIncluded@\pgfsys@CssIncluded@false
+\def\pgfsys@beginpicture{%
+ \pgfsys@svg@boxmodefalse%
+ \EndP\HtmlParOff%
+ \pgfkeys{/pgf/tex4ht node/escape=false}%
+ % text only nodes are the default. Advantage : pure svg pictures are
+ % the default, nicer for text only nodes.
+ % Disadvantages : this rendering methods produce more invalid or degraded svg pictures than with the foreignelement tag
+ %% we use css to control the display of foreignelement rendered text nodes
+ \ifpgfsys@CssIncluded@
+ \else
+ \Css{
+ .foreignobject {%
+ line-height:100\%;
+ font-size:120\%; % this is the trick....a font of size 100% in
+ % a box scaled down to half size makes it a
+ % half size font.
+ % you'll have to double the size of things
+ % that you want to have a regular size in
+ % this half-scaled box though
+ font-family:STIXgeneral,Times,Symbol,cmr10,CMSY10,CMEX10;%
+ % can't wait for the stix font...the cmr10, etc font are
+ % available from the mozilla site, times and symbols should be
+ % okey
+ padding:0;
+ margin:0;
+ % background-color:\#12ff55; usefull for debugging positioning
+ text-align:center; % good for centered text nodes...will have to improve that later on...with more integration with pgf options for text nodes
+ }
+ }%
+ \Css{%
+ math {%, math[mode="inline"] {
+ vertical-align:baseline;
+ line-height:100\%;
+ font-size:100\%;
+ font-family:STIXGeneral,Times,Symbol, cmr10,cmsy10,cmex10,cmmi10;
+ font-style: normal;
+ margin:0;
+ % background-color:\#99ff99;
+ padding:0;
+ }%
+ }%
+ \pgfsys@CssIncluded@true
+ \fi
+}%
+
+\def\pgfsys@endpicture{%
+ \HtmlParOn
+ \par% FIXME : was '\Par' but that seems to be undefined!?
+}%
+
+% this is okay for both rendering methods for text nodes (mtext or foreignelement)...
+\def\pgfsys@typesetpicturebox#1{%
+ \global\advance\pgf@sys@svg@picnum by 1\relax%
+ % Ok, compute width/height
+ \pgf@xa=\pgf@picminx%
+ \pgf@ya=\pgf@picminy%
+ \pgf@xb=\pgf@picmaxx%
+ \pgf@yb=\pgf@picmaxy%
+ \pgf@x=\pgf@xb%
+ \advance\pgf@x by-\pgf@xa%
+ \pgf@y=\pgf@yb%
+ \advance\pgf@y by-\pgf@ya%
+ \ifdim\pgf@y<1pt%
+ \pgf@y=1pt%
+ \fi%
+ \pgf@xc=\pgf@x%
+ \pgf@yc=\pgf@y%
+ \pgfsysprotocol@flushcurrentprotocol%
+ \HCode{<object data="\jobname-\the\pgf@sys@svg@picnum.svg" width="}%
+ % Calculate pixel coordinates (this does not really make sense, but
+ % we have to do it anyway). Assume 96dpi.
+ \pgf@x=1.3333333\pgf@x%
+ \pgf@y=1.3333333\pgf@y%
+ % Add one pixel for security:
+ \advance\pgf@x by1pt%
+ \advance\pgf@y by1pt%
+ \pgf@sys@pt\pgf@x%
+ \pgfsysprotocol@flushcurrentprotocol%
+ \pgfsys@invoke{" height="}%
+ \pgf@sys@pt\pgf@y%
+ \pgfsysprotocol@flushcurrentprotocol%
+ \pgfsys@invoke{" type="image/svg+xml"><p>SVG-Viewer needed.</p></object>}%
+ \special{t4ht>\jobname-\the\pgf@sys@svg@picnum.svg}%
+ %%%%%%%% This is necessary to control the svg through css
+ \pgfkeys{%
+ /pgf/tex4ht node/css/.get=\pgfsys@foreignobject@css
+ }%
+ \pgfsys@invoke{<?xml version="1.0" encoding="iso-8859-1" standalone="no"?>\Hnewline% added that
+ <?xml-stylesheet href="\pgfsys@foreignobject@css.css" type="text/css"?>\Hnewline}% added that
+%%%%%%%%%%%%%%% maybee I should add an option to change the css, for the whole picture
+ \pgfsys@invoke{<svg xmlns="http://www.w3.org/2000/svg"
+ xmlns:xlink="http://www.w3.org/1999/xlink" width="\the\pgf@xc"
+ height="\the\pgf@yc" viewBox="}%
+ \pgf@sys@pt{\pgf@xa}\pgf@sys@pt{\pgf@ya}\pgf@sys@pt{\pgf@xc}\pgf@sys@pt{\pgf@yc}%
+ \pgfsysprotocol@flushcurrentprotocol%
+ \pgf@ya=-\pgf@ya%
+ \pgfsys@invoke{">\Hnewline <g transform="translate(0,}
+ \pgf@sys@pt\pgf@yb\pgfsysprotocol@flushcurrentprotocol%
+ \pgfsys@invoke{) scale(1,-1) translate(0,}%
+ \pgf@sys@pt\pgf@ya\pgfsysprotocol@flushcurrentprotocol%
+ \pgfsys@invoke{)">\Hnewline }%
+ %
+ \pgf@ya=\pgf@shift@baseline\relax%
+ \advance\pgf@ya by-\pgf@picminy\relax%
+ %
+ %
+ \advance\pgf@picmaxy by-\pgf@picminy\relax% maxy is now the height
+ \advance\pgf@picmaxx by-\pgf@picminx\relax% maxx is now the width
+ \setbox#1=\hbox{\hskip-\pgf@picminx\lower\pgf@picminy\box#1}%
+ \ht#1=\pgf@picmaxy%
+ \wd#1=\pgf@picmaxx%
+ \dp#1=0pt%
+ \leavevmode
+ \pgf@xa=\pgf@trimleft@final\relax \ifdim\pgf@xa=0pt \else\kern\pgf@xa\fi
+ \raise-\pgf@ya\box#1%
+ \pgf@xa=\pgf@trimright@final\relax \ifdim\pgf@xa=0pt \else\kern\pgf@xa\fi
+ \pgfsys@invoke{</g>\Hnewline </svg>\Hnewline }%
+ \special{t4ht<\jobname-\the\pgf@sys@svg@picnum.svg}%
+}%
+
+%% we'll use this hbox for the mtext rendering method (the "text only=true" option)
+\def\pgfsys@hbox#1{%
+ \pgf@x=.5\wd#1%
+ \ifx\tikz@textcolor\relax\else\ifx\tikz@textcolor\@undefined\else%
+ \ifx\tikz@textcolor\pgfutil@empty%
+ \pgfsetfillcolor{.}%
+ \else%
+ \pgfsetfillcolor{\tikz@textcolor}%
+ \fi%
+ \fi\fi% tweak for TikZ
+ \HCode{<text
+ style="stroke:none"
+ transform="scale(1,-1) translate(\pgf@sys@tonumber{\pgf@x},0)"
+ text-anchor="middle"
+ }%
+ \ifpgfutil@format@is@latex%
+ \ifx\f@size\pgfutil@empty%
+ \else%
+ \HCode{ font-size="\f@size"}%
+ \fi%
+ \fi%
+ \HCode{>\Hnewline }%
+ \wd#1=0pt%
+ \ht#1=0pt%
+ \dp#1=0pt%
+ \box#1
+ \HCode{</text>\Hnewline }%
+}%
+
+%% we save this definition
+\let\pgfsys@mtext@hbox\pgfsys@hbox
+
+%% we have to use some "evil" ^^ tex4ht hackery
+% tex4ht hackery
+{% grouping necessary cause we change the catcode of ":"
+ \catcode`:=11\relax
+ %%% this is necessary to calculate the size of text nodes with
+ %%% inline maths
+ % (it is an improvement of tex4ht, got to ask eitan gurary if he
+ % could put it in the tex4ht code)
+ \gdef\DviMathAlt{%
+ \a:DviMath\leavevmode \MathClass
+ \ht:special{t4ht@(}\hbox\bgroup{\expandafter\ifx\csname
+ ht:everypar\endcsname\relax\expandafter\everypar\else
+ \expandafter\ht:everypar\fi{}\leavevmode\ht:special{t4ht@)}}\DviSend
+ }%
+ % these are configures for the foreignelement rendering method of text nodes : we let tex4ht write xhtml and mathml in the svg picture
+ %
+ \gdef\pgfsys@foreignobject@configure{%
+ \Configure{$}{\Configure{@math}{%\a:mathml
+ display="inline" }\DviMathAlt}{\EndDviMath}{}%%% we REALLY need to use \DviMathAlt here instead of \DviMath see above remark
+ \Configure{$$}{\Configure{@math}{%\a:mathml
+ display="block" }\IgnorePar
+ \ifvmode\else \HCode{<!--tex4ht:inline-->}\fi\EndP
+ \DviMath}{\EndDviMath\ShowPar\pgfsys@foreignobject@par{\csname HCondtrue\endcsname\noindent}
+ }{\DisplayMathtrue}%
+ \Configure{SUB}{\Send{BACK}{<\a:mathml msub><\a:mathml mrow\Hnewline>}%
+ \Tg</\a:mathml mrow>\Tg<\a:mathml mrow\Hnewline>\trap:base}{\Tg</\a:mathml mrow>\TG</\a:mathml msub\Hnewline>}%
+ \Configure{SUP}{\Send{BACK}{<\a:mathml msup><\a:mathml mrow\Hnewline>}%
+ \Tg</\a:mathml mrow>\Tg<\a:mathml mrow\Hnewline>\trap:base}{\Tg</\a:mathml mrow>\TG</\a:mathml msup\Hnewline>}%
+ \Configure{SUBSUP}{\Send{BACK}{<\a:mathml msubsup><\a:mathml mrow\Hnewline>}%
+ \Tg</\a:mathml mrow>\Tg<\a:mathml mrow\Hnewline>\trap:base}{\Tg</\a:mathml mrow>\Tg<\a:mathml mrow\Hnewline>\trap:base}{\Tg</\a:mathml mrow>\TG</\a:mathml msubsup\Hnewline>}%
+ \Configure{htf}{0}{+}{<span\Hnewline
+ class="}{\%s}{-\%s}{x-x-\%d}{}{">}{</span>}%
+ }%
+ \global\let\pgfsys@foreignobject@par=\par % use this instead of \par
+ % -- \Configure is no \long macro (at
+ % least in one of the older
+ % versions).
+
+ % these are the configures for the mtext rendering method of text
+ % nodes : we turn everything into regular character (don't want math
+ % modes or subsup)
+ % and we hope it works (it doesn't if the text nodes aren't simple)
+ \gdef\pgfsys@mtext@configure{%
+ % no configures for \(\) and \[\] those might be needed for
+ % context or Latex. Let me know !
+ \Configure{$$}{}{}{}% no block maths
+ \Configure{$}{}{}{}%$ no inline maths
+ \Configure{SUB}{\HCode{<tspan baseline-shift="sub">}}{\HCode{</tspan>}}%
+ \Configure{SUP}{\HCode{<tspan baseline-shift="sub">}}{\HCode{</tspan>}}%
+ \Configure{SUBSUP}{}{}{}% not both sub and sup
+ \Configure{htf} {0}{+}{<tspan font-family="}{\%s}{" font-size="\%s}{}{}{">}{</tspan>}%
+ }%
+}%
+
+% a counter to produce unique ids for each text node rendered with foreign element
+\newcount\pgf@sys@svg@nodenum
+
+
+% pgfutil@minipage
+%
+% I had to change it to make it play nice with the way tex4ht puts <p> and <\p> tags
+%
+
+\newif\ifpgfsys@textonly
+\def\pgfutil@minipage[#1]#2{%
+ \hbox to#2\bgroup
+ \hsize=#2\relax
+ \vbox\bgroup
+% though it works, I'm desabling the above-mentioned hack to make tex4ht behave with <p> <\p>, because it blurps the positioning
+% (I''l try to fix that later, it's a css thing)
+%
+% \ifpgfsys@textonly\else\HtmlParOn\fi
+%
+% \noindent is better as it doesn't produce indentation AND it makes you leave vertical mode
+ \noindent%\leavevmode
+}%
+\def\pgfutil@endminipage{%
+% same thing here
+%
+% \ifpgfsys@textonly\else\EndP\HtmlParOff\fi
+ \egroup\egroup
+}%
+
+
+% I'll have to fix those names later
+\newbox\pgfsys@foreignobject@Box
+\newdimen\pgf@s
+\newdimen\pgf@t
+% this is the alternate hbox routine that renders text nodes through the foreignobject tag
+\def\pgfsys@foreignobject@hbox#1{%
+ % Compute box y translation (x translation is correct).
+ \pgf@y=-\ht#1\relax
+ \HCode{<g transform="scale(1,-1) translate(0,\pgf@sys@tonumber{\pgf@y}) % got to translate in y
+ scale(0.5,0.5)">\Hnewline}% scaling work around (damn dumb browsers !)
+ % Compute box size (scaled 2 times)
+ % this is necessary to make the browser scale the font down 50% (the STUPID browsers won't make font-size:50% happen,
+ % so we have to work around this by making svg scale the things down 50%, doubling the size of the text node frame (i.e. no changement there)
+ \pgf@x=2\wd#1\relax
+ \pgf@y=2\ht#1\relax
+ \advance\pgf@y by 2\dp#1\relax
+ % this is to adjust the y translation to compensate for the differences between the TeX and the Html models for lines
+ \setbox\pgfsys@foreignobject@Box=\hbox{abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
+ $abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZf_1^1\overline D)_1^1\vec i\vec j$}%
+ \pgf@t=\ht#1\relax
+ \advance\pgf@t by -\ht\pgfsys@foreignobject@Box\relax
+ \pgf@s=\pgf@t\relax
+ \advance\pgf@s by \dp#1\relax
+ \advance\pgf@s by -\dp\pgfsys@foreignobject@Box\relax
+ \ifnum\pgf@s>0\relax
+ \pgf@s=0pt
+ \pgf@t=0pt
+ \else
+ \advance \pgf@y by -2\pgf@s\relax
+ \pgf@t=2\pgf@t\relax
+ \fi
+ %
+ \HCode{<foreignObject x="0" y="\pgf@sys@tonumber{\pgf@t}"
+ width="\pgf@sys@tonumber{\pgf@x}" height="\pgf@sys@tonumber{\pgf@y}">}%
+ % this is to make use of the css, class and id options through which you can control the way things display
+ \pgfkeys{%
+ /pgf/tex4ht node/css/.get=\pgfsys@foreignobject@css,%
+ /pgf/tex4ht node/class/.get=\pgfsys@foreignobject@class,%
+ /pgf/tex4ht node/id/.get=\pgfsys@foreignobject@id
+ }%
+ \HCode{<head>\Hnewline
+ <link rel="stylesheet" type="text/css" href="\pgfsys@foreignobject@css.css" />\Hnewline
+ </head>\Hnewline
+ % I'll have to look into this, perhaps there are better
+ % doctype....&nbsp; aren't recognised and produces invalid svg
+ % pictures a workaround (not implemented yet) would be to make
+ % them into entities of the svg picture.
+ <body id="\pgfsys@foreignobject@id" class="\pgfsys@foreignobject@class" xmlns="http://www.w3.org/1999/xhtml" >\Hnewline
+ <div>\Hnewline
+ }%
+ \box#1%
+ \HCode{%
+ </div>\Hnewline
+ </body>\Hnewline
+ </foreignObject>\Hnewline
+ }%
+ % debug positioning not needed but it would be nice to let it there to control things later on
+ % \HCode{<rect x="0" y="0" width="\pgf@sys@tonumber{\pgf@x}" height="\pgf@sys@tonumber{\pgf@y}"
+ % style="fill:yellow;stroke:red; fill-opacity:0.5;stroke-opacity:0.5"/>}
+ \HCode{</g>\Hnewline}%
+ \global\advance\pgf@sys@svg@nodenum by 1\relax
+}%
+
+% the options and the code that controls it all (switches between \pgfsys@mtext@hbox and \pgfsys@foreignelement@hbox)
+
+\pgfkeys{%
+ /pgf/.cd,
+ tex4ht node/escape/.is choice,
+ tex4ht node/escape/false/.code={\let\pgfsys@hbox\pgfsys@mtext@hbox\pgfsys@mtext@configure\pgfsys@textonlytrue},
+ tex4ht node/escape/true/.code={\let\pgfsys@hbox\pgfsys@foreignobject@hbox\pgfsys@foreignobject@configure\pgfsys@textonlyfalse},
+ tex4ht node/css/.initial=\jobname,
+ tex4ht node/class/.initial=foreignobject,
+ tex4ht node/id/.initial=\jobname\the\pgf@sys@svg@picnum-\the\pgf@sys@svg@nodenum
+}%
+
+
+
+
+
+
+% this might be needed
+%\font\SvgText=cmr10\relax
+
+
+
+
+% There is something rellay wrong with the way "%" chars are used in here... you should code "}%" to avoid unnecessary spaces
+% and it is unnecessary to code \cs%
+% got to be carefull with numbers though, cf the texbook...2\relax and 2 % are okey
+
+\def\pgfsys@outerinvoke{\ifpgfpicture\expandafter\pgfsys@invoke\else\expandafter\pgfutil@gobble\fi}
+
+\def\pgfsys@shadingoutsidepgfpicture#1{\pgf@sys@fail{svg code in preamble}}
+\def\pgfsys@shadinginsidepgfpicture#1{\pgf@sys@fail{svg code in preamble}}
+
+\def\pgfsys@body@shadingoutsidepgfpicture#1{%
+ \begingroup%
+ #1%
+ \setbox\pgfpic=\hbox to0pt{%
+ \pgfsys@beginpicture%
+ \pgfsys@beginscope%
+ \pgf@sys@svg@sh@defs%
+ \pgf@sys@svg@sh%
+ \pgfsys@endscope%
+ \pgfsys@endpicture%
+ \hss%
+ }%
+ \pgf@process{\pgf@sys@svg@pos}%
+ \pgf@picminx=0pt%
+ \pgf@picminy=0pt%
+ \pgf@picmaxx=\pgf@x%
+ \pgf@picmaxy=\pgf@y%
+ \def\pgf@trimleft@final{0pt}%
+ \def\pgf@trimright@final{0pt}%
+ \def\pgf@shift@baseline{0pt}%
+ \pgfsys@typesetpicturebox\pgfpic%
+ \endgroup%
+}
+
+\def\pgfsys@body@shadinginsidepgfpicture#1{%
+ #1%
+ \pgf@sys@svg@sh@defs% hmmm....
+ \pgf@process{\pgf@sys@svg@pos}
+ \pgf@xa=-.5\pgf@x%
+ \pgf@ya=-.5\pgf@y%
+ \pgfsysprotocol@literal{<g transform="translate(\pgf@sys@tonumber{\pgf@xa},\pgf@sys@tonumber{\pgf@ya})">\Hnewline}%
+ \pgf@sys@svg@sh%
+ \pgfsysprotocol@literal{</g>\Hnewline}%
+}
+
+
+\ifpgfutil@format@is@latex
+ % Protect against color.4ht evil meddling with xcolor:
+ \RequirePackage{xcolor}
+ \let\pgf@xcolor@declaredcolor=\@declaredcolor
+ \let\pgf@xcolor@undeclaredcolor=\@undeclaredcolor
+\fi
+
+\AtBeginDocument{
+ \let\pgfsys@invoke=\pgfsys@body@invoke
+ \let\pgfsys@shadingoutsidepgfpicture=\pgfsys@body@shadingoutsidepgfpicture
+ \let\pgfsys@shadinginsidepgfpicture=\pgfsys@body@shadinginsidepgfpicture
+ \ifpgfutil@format@is@latex
+ \let\pgf@texht@declaredcolor=\@declaredcolor
+ \let\pgf@texht@undeclaredcolor=\@undeclaredcolor
+ \def\@declaredcolor{\ifpgfpicture\expandafter\pgf@xcolor@declaredcolor\else\expandafter\pgf@texht@declaredcolor\fi}
+ \def\@undeclaredcolor{\ifpgfpicture\expandafter\pgf@xcolor@undeclaredcolor\else\expandafter\pgf@texht@undeclaredcolor\fi}
+ \fi
+ \def\pgfutil@color{\pgfsetcolor}
+ % \ConfigureEnv{pgfpicture}{}{}{}{} there is no environment in plain TeX and this produces errors
+ % this might be needed for context or latex though....let me know !
+}%
+
+\endinput
+
+
+%%% Local Variables:
+%%% mode: latex
+%%% End: