latex 下修改目录toc的字体大小和行距

默认情况下，latex的TOC是由一级和二级标题构成，TOC的行距和字体调整比较麻烦，得熟悉latex.ltx命令，所以稍微研究了一下实现方法。

\def\numberline#1{\fontsize{6}{12}\selectfont\hb@xt@\@tempdima{#1\hfil}} % change fontsize for toc item

\renewcommand*\l@section[2]{%
  \ifnum \c@tocdepth >\z@
    \addpenalty\@secpenalty
    \addvspace{-1em \@plus\p@}%  关键：report or article: change section item vertical space
    \setlength\@tempdima{1.5em}%
    \begingroup
      \parindent \z@ \rightskip \@pnumwidth
      \parfillskip -\@pnumwidth
      \leavevmode \bfseries
      \advance\leftskip\@tempdima
      \hskip -\leftskip
      #1 \nobreak\hfil
      \nobreak\hb@xt@\@pnumwidth{\hss #2%
                                 \kern-\p@\kern\p@}\par
    \endgroup
  \fi}

  \def\@dottedtocline#1#2#3#4#5{%
  \ifnum #1>\c@tocdepth \else
    \vskip \z@ \@plus.2\p@
    \vskip -1em % 关键：report or article: change subsection item vertical space
    {\leftskip #2\relax \rightskip \@tocrmarg \parfillskip -\rightskip
     \parindent #2\relax\@afterindenttrue
     \interlinepenalty\@M
     \leavevmode
     \@tempdima #3\relax
     \advance\leftskip \@tempdima \null\nobreak\hskip -\leftskip
     {#4}\nobreak
     \leaders\hbox{$\m@th
        \mkern \@dotsep mu\hbox{.}\mkern \@dotsep
        mu$}\hfill
     \nobreak
     \hb@xt@\@pnumwidth{\hfil\normalfont \normalcolor #5%
                        \kern-\p@\kern\p@}%
     \par}%
  \fi}