tex4ht 对梵文文本的奇怪行为

Question

在 XeTeX 模式下，TeX4ht 将 Unicode 字符定义为活动字符，以便可以将它们作为特殊标记插入到输出中，这将在 HTML 输出中产生相同的 Unicode 字符。由于有成千上万个 Unicode 字符，我们仅根据字体脚本声明所需的字符。由于处理中的错误\newfontfamily，当您在字体名称前使用可选参数时，这无法正常工作。

这是修复版本。将以下代码保存为usepackage-fontspec.4ht：

% usepackage-fontspec.4ht (2020-09-02-14:24), generated from tex4ht-4ht.tex
% Copyright 2017-2020 TeX Users Group
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either
% version 1.3c of this license or (at your option) any
% later version. The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions
% of LaTeX version 2005/12/01 or later.
%
% This work has the LPPL maintenance status "maintained".
%
% The Current Maintainer of this work
% is the TeX4ht Project <http://tug.org/tex4ht>.
%
% If you modify this program, changing the
% version identification would be appreciated.
\immediate\write-1{version 2020-09-02-14:24}

% \RequirePackage{expl3}% we need to disable them before loading
\ExplSyntaxOn
\seq_new:N \fontspec_ht_scripts
\gdef\texfourhtfontspecloaded{yes}% used to prevent subsequent loading of this file
\ExplSyntaxOff
\ifdefined\XeTeXversion%
\xenunidelblock{Latin-expl3}% expl3 package makes some characters active
\xeuniuseblock{Latin-expl3}% and define again
\fi%
\PassOptionsToPackage{no-math}{fontspec}
\ExplSyntaxOn
\:AtEndOfPackage{%
  \tl_gset:Nx \l__fontspec_nfss_enc_tl {T1}
  \tl_gset:Nx \g_fontspec_encoding_tl {T1}
  \tl_gset:Nx \l__fontspec_ttfamily_encoding_tl {T1}
  \tl_gset:Nx \l__fontspec_sffamily_encoding_tl {T1}
  \tl_gset:Nx \l__fontspec_rmfamily_encoding_tl {T1}
  \seq_new:N \fontspec_ht_fontfamilies
  \ifdefined\XeTeXversion
  \keys_define:nn {fontspec4ht}{
    Script .code:n = \xeuniuseblock{#1}
  }
  \else
  \keys_define:nn {fontspec4ht}{
    Script .code:n = \seq_put_right:Nn \fontspec_ht_scripts {#1}
  }
  \fi
\cs_set:Nn \fontspec_set_family:Nnn
 {
  % \tl_set:Nn \l__fontspec_family_label_tl { #1 }
  % \__fontspec_select_font_family:nn {#2}{#3}
  % \tl_set_eq:NN #1 \l_fontspec_family_tl
  \def#1{\relax}
 }


\prg_set_conditional:Nnn \fontspec_if_fontspec_font: {TF,T,F}
{
  \prg_return_false:
}

\DeclareDocumentCommand \setmainfont { O{} m O{} }
 {
   % Optional argument can be in both first and third parameter
  \keys_set_known:nn {fontspec4ht}{#1}
  \keys_set_known:nn {fontspec4ht}{#3}
  \seq_put_right:Nn \fontspec_ht_fontfamilies {#2}
  \use:x { \exp_not:n { \DeclareRobustCommand \rmfamily }
   {
    \relax
   }
  }
  \normalfont
  \ignorespaces
 }

 % define aliases for other user commands
\cs_set_eq:NN \fontspec\setmainfont
\cs_set_eq:NN \setsansfont\setmainfont
\cs_set_eq:NN \setmonofont\setmainfont
\cs_set_eq:NN \setromanfont\setmainfont
\cs_set_eq:NN \setmathrm\setmainfont
\cs_set_eq:NN \setmathsf\setmainfont
\cs_set_eq:NN \setboldmathrm\cs_set_eq:NN
\cs_set_eq:NN \setmatht\cs_set_eq:NN



\DeclareDocumentCommand \newfontfamily { m O{} m O{} }
 {
  % \fontspec_set_family:cnn { g__fontspec_ \cs_to_str:N #1 _family } {#2} {#3}
  \keys_set_known:nn {fontspec4ht}{#2}
  \keys_set_known:nn {fontspec4ht}{#4}
  \seq_put_right:Nn \fontspec_ht_fontfamilies {#3}
  \use:x
   {
    \exp_not:N \DeclareRobustCommand \exp_not:N #1
     {
       \relax
     }
   }
 }
 % \tl_set:Nn \g_fontspec_encoding_tl{T1}
 %  \tl_set_eq:NN \encodingdefault\g_fontspec_encoding_tl
 \DeclareDocumentCommand \addfontfeatures {m}
 {
   \keys_set_known:nn {fontspec4ht}{#1}
   \typeout{Add font features}
 }
 \cs_set_eq:NN \addfontfeature \addfontfeatures
  \global\expandafter\let\csname [email protected]\endcsname\relax
  \global\expandafter\let\csname [email protected]\endcsname\relax
}
\ExplSyntaxOff
\edef\TivhTcats{%
  \catcode`:=12%
  \catcode`@=\the\catcode`@%
}

\endinput

经过这种改变，你应该会得到正确的结果：

或者，您可以使用-l选项代替-x。得益于 LuaTeX，这将使用不同的方法处理 Unicode。它不会遇到未定义的 Unicode 字符的问题。

关于 Polyglossia 错误，我无法重现。您使用哪个 TeX 发行版？

Answer 1