如何强制 tcolorbox 包覆盖页面的上下部分？

Question

代码

\documentclass{book}
\usepackage[many]{tcolorbox}
\usepackage{lipsum}

\begin{document}
\chapter{Foo bar}
\lipsum[1-2]

\begin{tcolorbox}[size=tight,oversize,
  sharp corners,
    breakable,
  enhanced,
  interior style={top color=green!30!white,bottom color=green!30!white},
  colframe=blue,
  colupper=black,
  left=170pt,
  right=170pt,
  bottom=10pt,
  top=10pt,
  ]
\lipsum[2-3]
\end{tcolorbox}

\lipsum[2]
\end{document}

给出了这个结果：

但我想要这个结果（这是 Photoshop！）：

有没有办法做到这一点？

Answer 1

您可以将选项与和underlay结合使用。 允许引用其他框架图片或在附加部分使用节点。避免在填充的矩形后面出现虚假线条。rememberframe hiddenremembercurrent pageoverlay|underlayframe hidden

\documentclass{book}
\usepackage[many]{tcolorbox}
\usepackage{lipsum}

\begin{document}
\chapter{Foo bar}
\lipsum[1-2]

\begin{tcolorbox}[oversize,
  remember,
  sharp corners,
    breakable,
  enhanced,
  frame hidden,
  underlay first={\fill[green!30!white] (frame.north-|current page.west) rectangle (current page.south east);},
  underlay last={\fill[green!30!white] (current page.north west) rectangle (current page.east|-frame.south);},
  colframe=blue,
  colupper=black,
  bottom=10pt,
  top=10pt,
]
\lipsum[2-3]
\end{tcolorbox}

\lipsum[2]
\end{document}

更新：如何保留标题？

我不知道如何解决这个问题。据我所知，您希望稍后绘制的内容（彩色框）不会覆盖已打印在页面上的内容（页眉）。可能会tcolorbox留下一些有关损坏框的信息，这些信息可用于了解在打印页眉之前必须在下一页添加一些背景。但我不知道如何使用它。也许后续问题会吸引比我更聪明的人的兴趣。

我能做的最好的事情，看起来很糟糕，就是利用tikzpagenodes包裹的帮助在标题区域打一个洞。

\documentclass{book}
\usepackage[many]{tcolorbox}
\usepackage{lipsum}
\usepackage{tikzpagenodes}

\begin{document}
\chapter{Foo bar}
\lipsum[1-2]

\begin{tcolorbox}[oversize,
  remember,
  sharp corners,
    breakable,
  enhanced,
  frame hidden,
  interior hidden,
  underlay first={\fill[green!30!white] (frame.north-|current page.west) 
                     rectangle (current page.south east);},
  underlay last={\begin{scope}[even odd rule, fill=green!30!white]
         \fill[clip] (current page.north west) rectangle 
                     (current page.east|-frame.south) 
                     (current page header area.north west) rectangle 
                     (current page header area.south east);
         \end{scope}
},
  colframe=blue,
  colupper=black,
  bottom=10pt,
  top=10pt,
]
\lipsum[2-3]
\end{tcolorbox}

\lipsum[2]
\end{document}

Answer 2

这里有一个可破坏盒子的解决方案，它有两个部分（第一部分和最后一部分），您可以使用overlay first并overlay last为每个部分添加图形代码

\documentclass{book}
\usepackage[many]{tcolorbox}
\usepackage{lipsum}

\begin{document}
\chapter{Foo bar}
\lipsum[1-2]

\begin{tcolorbox}[size=tight,oversize,
  sharp corners,
  breakable,
  enhanced,
  interior style={top color=green!30!white,bottom color=green!30!white},
  colframe=blue,
  colupper=black,
  left=170pt,
  right=170pt,
  bottom=10pt,
  top=10pt,
  remember,
  overlay first={\fill[green!30!white]
(frame.south east) rectangle (current page.south west)
;},
overlay last={
\fill[green!30!white]
(frame.north west) rectangle (current page.north east)
;}
  ]

\lipsum[2-3]
\end{tcolorbox}

\lipsum[2]
\end{document}

更新

可以用opacity键显示标题并增加颜色程度

\documentclass{book}
\usepackage[many]{tcolorbox}

\usepackage{lipsum}

\newtcolorbox{mybox}{size=tight,oversize,
  sharp corners,
  breakable,
  enhanced,
  interior style={color=green!30!white},
  colframe=blue,
  colupper=black,
  left=170pt,
  right=170pt,
  bottom=10pt,
  top=10pt,
  remember,
  overlay first={\fill[green!30!white]
(frame.south east) rectangle (current page.south west)
;},
overlay last={
\fill[green,opacity=0.3]
([yshift=0.5pt]frame.north west) rectangle (current page.north east)
;
}}

\begin{document}
\chapter{Foo bar}
\lipsum[1-2]

\begin{mybox}
\lipsum[2-3]
\end{mybox}

\lipsum[2]
\end{document}