获取当前容器的宽度

Question

我正在尝试创建一个通用命令来编写实心标题。标题的宽度应适合其呈现标题的包含环境。

在下面的例子中，橙色标题超出了表格范围。

我应该使用什么命令来替换\textwidthsolidheading 以便它始终打印适合段落宽度或表格列内的宽度？

产生该结果的代码如下：

\documentclass[12pt]{article}

\usepackage{xcolor}

\newcommand{\solidheading}[2][yellow]{
    \noindent \colorbox{#1}{\parbox[t]{\textwidth}{#2}}
    \vskip1ex
}

\usepackage{colortbl}
\usepackage{fontawesome5}

\newenvironment{notes}
{ \noindent
  \begin{tabular}{!{\color{black}\vrule width 0.01\textwidth}p{0.85\textwidth}}
    {\cellcolor{gray}}
    {\Large\faEdit[regular]} \bfseries{Notes}\\
    {\cellcolor{lightgray}}
}
{
  \end{tabular}
}


\begin{document}

\solidheading[pink]{Heading outside Table}

\begin{notes}
    \solidheading[orange]{Don't forget}
    Smile and say hello.\newline
    Happy makes happy.
\end{notes}

\end{document}

Answer 1

您可以使用\linewidth：\textwidth

\newcommand{\solidheading}[2][yellow]{
    \noindent \colorbox{#1}{\parbox[t]{\linewidth}{#2}} % \textwidth <==============
    \vskip1ex
}

附完整代码

\documentclass[12pt]{article}

\usepackage{xcolor}

\newcommand{\solidheading}[2][yellow]{
    \noindent \colorbox{#1}{\parbox[t]{\linewidth}{#2}} % \textwidth 
    \vskip1ex
}

\usepackage{colortbl}
\usepackage{fontawesome5}

\newenvironment{notes}
{ \noindent
  \begin{tabular}{!{\color{black}\vrule width 0.01\textwidth}p{0.85\textwidth}}
    {\cellcolor{gray}}
    {\Large\faEdit[regular]} \bfseries{Notes}\\
    {\cellcolor{lightgray}}
}
{
  \end{tabular}
}


\begin{document}

\solidheading[pink]{Heading outside Table}

\begin{notes}
    \solidheading[orange]{Don't forget}
    Smile and say hello.\newline
    Happy makes happy.
\end{notes}

\end{document}

结果如下：