workaround for svg jupyter issue

gap/JupyterUtil.gi

@@ -45,7 +45,7 @@ end);
 # To show TikZ in a GAP jupyter notebook
 BindGlobal("JupyterSplashTikZ",
 function(tikz)
- local tmpdir, fn, header, ltx, svgfile, stream, svgdata, tojupyter,hasbp;
+ local tmpdir, fn, header, ltx, svgfile, stream, svgdata, tojupyter, hasbp, img, b64file;
 
  hasbp:=PositionSublist(tikz,"begin{tikzpicture}")<>fail;
 
@@ -64,6 +64,7 @@ function(tikz)
  else
  header:=Concatenation(header,"\\end{tikzpicture}\n\\end{document}");
  fi;
+
  tmpdir := DirectoryTemporary();
  fn := Filename( tmpdir, "svg_get" );
 
@@ -76,32 +77,38 @@ function(tikz)
 
  if not( IsExistingFile( Concatenation(fn, ".pdf") ) ) then
  tojupyter := rec( json := true, name := "stdout",
- data := "No pdf was created; pdflatex is installed in your system?" );
- else
- svgfile := Concatenation( fn, ".svg" );
+ data := "No pdf was created; pdflatex is installed in your system?",metadata:=rec() );
+ return JupyterRenderable(tojupyter.data, tojupyter.metadata);
+ fi;
+
+ svgfile := Concatenation( fn, ".svg" );
+ b64file := Concatenation( fn, ".b64" );
+ if ARCH_IS_MAC_OS_X() then 
  ltx := Concatenation( "pdf2svg ", Concatenation( fn, ".pdf" ), " ",
- svgfile, " >> ", Concatenation( fn, ".log2" ) );
- Exec( ltx );
+ svgfile, "; base64 -i ", svgfile," >> ", b64file );
 
- if not( IsExistingFile( svgfile ) ) then
- tojupyter := rec( json := true, name := "stdout",
- data := "No svg was created; pdf2svg is installed in your system?" );
- else
- stream := InputTextFile( svgfile );
- if stream <> fail then
- svgdata := ReadAll( stream );
- tojupyter := rec( json := true, source := "gap",
- data := rec( ( "image/svg+xml" ) := svgdata ),
- metadata := rec( ( "image/svg+xml" ) := rec( width := "100%", height := "100%" ) ) );
- CloseStream( stream );
- else
- tojupyter := rec( json := true, name := "stdout",
- data := Concatenation( "Unable to render ", tikz ), metadata := rec() );
- fi;
- fi;
+ else 
+ ltx := Concatenation( "pdf2svg ", Concatenation( fn, ".pdf" ), " ",
+ svgfile, "; base64 ", svgfile," >> ", b64file );
+ fi;
+ Exec( ltx );
+ if not( IsExistingFile( svgfile ) ) then
+ tojupyter := rec( json := true, name := "stdout",
+ data := "No svg was created; pdf2svg is installed in your system?", metadata := rec());
+ return JupyterRenderable(tojupyter.data, tojupyter.metadata);
+ fi;
+ stream := InputTextFile( b64file );
+ if stream <> fail then
+ svgdata := ReadAll( stream );
+ CloseStream( stream );
+ else
+ tojupyter := rec( json := true, name := "stdout",
+ data := Concatenation( "Unable to render ", tikz ), metadata := rec() );
+ return JupyterRenderable(tojupyter.data, tojupyter.metadata);
  fi;
 
- return JupyterRenderable(tojupyter.data, tojupyter.metadata);
+ img:=Concatenation("<img src='data:image/svg+xml;base64,", svgdata,"'>");
+ return Objectify( JupyterRenderableType, rec( data := rec( ("text/html") := img), metadata:=rec() ));
 end);
 
 # This is really not what I should be doing here...