KOMA-Script 的 addmargin 環境與標題指令結合

Question

我想使用 KOMA-Script 的 addmargin 環境（僅限單邊文檔）有時使用文檔的整個寬度編寫內容，該文檔分為 2/3 文本區域和 1/3 邊距。

這是有效的......直到我意識到標題命令沒有按照我想要的方式採用整個寬度，請參閱（我當前的程式碼（僅我認為必要的部分））：

\documentclass[fontsize=12pt,twoside=false,paper=a4,DIV=15,BCOR=0mm,twocolumn=false,footinclude=true,headinclude=true,mpinclude=false]{scrreprt}% KOMAScript
\AfterCalculatingTypearea{%
    %% Margin
    \addtolength{\evensidemargin}{-\marginparwidth}%
    \addtolength{\textwidth}{\marginparwidth}%
    \setlength{\marginparwidth}{.333\textwidth}%
    \addtolength{\textwidth}{-\marginparwidth}%
    \addtolength{\evensidemargin}{\marginparwidth}%
}\recalctypearea%


\newlength{\overhang}%
\setlength{\overhang}{\marginparwidth}%
\addtolength{\overhang}{\marginparsep}%
\newenvironment{fullwidth}{%
    \begin{addmargin}[0em]{-\overhang}%
}{%
    \end{addmargin}%
}%


\usepackage{graphics}
\usepackage{graphicx}
\usepackage{caption}


\usepackage{float}
\usepackage{showframe}
\usepackage{lipsum}
\begin{document}
    %% Works as intended
    \lipsum[1]
    \begin{fullwidth}
        \lipsum[1]
    \end{fullwidth}
    %% Problem with caption
    \newpage
    \begin{figure}[H]\centering
        \includegraphics[width=0.5\linewidth]{example-image-a}
        \caption{This caption is centered as it should be. \lipsum[1]}
    \end{figure}
    \begin{figure}[H]
        \begin{fullwidth}\centering
            \includegraphics[width=0.5\linewidth]{example-image-a}
            \caption{The image is centered, but the caption is NOT ugh... \lipsum[1]}
        \end{fullwidth}
    \end{figure}
\end{document}

輸出是： 有人可以向我解釋如何解決這個問題嗎？我只是想讓標題明顯地使用全寬作為圖像。如果可能的話使用 addmargin 環境，因為我已經在我的文件中經常使用它。 ：D

Answer 1

addmargin是一個trivlist. AFAIK，它確實改變了，\linewidth但\textwidth也沒有改變\hsize。但\caption寬度似乎取決於這些。因此，例如使用：

\documentclass[fontsize=12pt,twoside=false,paper=a4,DIV=15,BCOR=0mm,twocolumn=false,footinclude=true,headinclude=true,mpinclude=false]{scrreprt}% KOMAScript
\AfterCalculatingTypearea{%
    %% Margin
    \addtolength{\evensidemargin}{-\marginparwidth}%
    \addtolength{\textwidth}{\marginparwidth}%
    \setlength{\marginparwidth}{.333\textwidth}%
    \addtolength{\textwidth}{-\marginparwidth}%
    \addtolength{\evensidemargin}{\marginparwidth}%
}\recalctypearea%


\newlength{\overhang}%
\setlength{\overhang}{\marginparwidth}%
\addtolength{\overhang}{\marginparsep}%
\newenvironment{fullwidth}{%
  \begin{addmargin}[0em]{-\overhang}%
    \textwidth\linewidth\hsize\linewidth% added
}{%
    \end{addmargin}%
}%


\usepackage{graphics}
\usepackage{graphicx}
\usepackage{caption}


\usepackage{float}
\usepackage{showframe}
\usepackage{lipsum}
\begin{document}
    %% Works as intended
    \lipsum[1]
    \begin{fullwidth}
        \lipsum[1]
    \end{fullwidth}
    %% Problem with caption
    \newpage
    \begin{figure}[H]\centering
        \includegraphics[width=0.5\linewidth]{example-image-a}
        \caption{This caption is centered as it should be. \lipsum[1]}
    \end{figure}
    \begin{figure}[H]
        \begin{fullwidth}\centering
            \includegraphics[width=0.5\linewidth]{example-image-a}
            \caption{The image is centered, but the caption is NOT ugh... \lipsum[1]}
        \end{fullwidth}
    \end{figure}
\end{document}