文本修饰中的边界框和变音符号问题

Question

在上面的 Ti钾Z图片，我该如何

• 扩展边界框以包含文本装饰，而无需手动修改（我能找到的唯一解决方案是摆弄border或margin类选项，请参阅这里)？
• Package inputenc Error: Unicode char避免第 24 行的尖锐 s “ß” 的错误？

代码

\documentclass[tikz,svgnames]{standalone}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usetikzlibrary{positioning,decorations.text}

\renewcommand{\familydefault}{\sfdefault}

\tikzset{
    entity/.style={fill=#1!70,text=white},
    action/.style={->,postaction={decorate,decoration={raise=2pt,text along path,text align=center,text={|\scriptsize|#1}}}}
}

\begin{document}
\begin{tikzpicture}

    % Entities
    \node[entity=DarkGreen] (A) {A};

    \node[entity=DarkBlue,right=2 of A] (B) {B};

    % Actions
    \draw[action=schließen] (A) to [bend left]  (B);
\end{tikzpicture}    
\end{document}

Answer 1

这会在装饰上方添加一条不可见的线。如果使该线可见，您将看到边界框比需要的略大。

我尝试了所有相关的建议\scriptsize并得出结论 OP 解决方案是最好的。

\documentclass[tikz,svgnames]{standalone}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usetikzlibrary{positioning,decorations.text,calc}

\renewcommand{\familydefault}{\sfdefault}

\tikzset{
    entity/.style={fill=#1!70,text=white},
    action/.style={->,postaction={decorate,decoration={raise=2pt,text along path,
      text align=center,text={|\scriptsize|#1}
}}}}

\newlength{\mybuffer}
\sbox0{\scriptsize\strut}
\setlength{\mybuffer}{\dimexpr 2pt+\ht0+\dp0}

\begin{document}

\begin{tikzpicture}
    % Entities
    \node[entity=DarkGreen] (A) {A};

    \node[entity=DarkBlue,right=2 of A] (B) {B};

    % Actions
    \draw[action={schlie{ß}en}] (A) to [bend left]  (B);
    \path ($(A)+(0pt,\mybuffer)$) to [bend left] ($(B)+(0pt,\mybuffer)$);
    %\draw[red] ($(A)+(0pt,\mybuffer)$) to [bend left] ($(B)+(0pt,\mybuffer)$);
\end{tikzpicture}    
\end{document}