% beamerthemeHeavenlyClouds.sty v1.0 2018/05/15
% by LianTze Lim (liantze@gmail.com)
\ProvidesPackage{beamerthemeHeavenlyClouds}

\RequirePackage{cncolours}
\RequirePackage{pgfornament-han}
\RequirePackage{tikz}
\usetikzlibrary{decorations,decorations.markings}
\RequirePackage{calc}

\setbeamercolor{structure}{fg=殷红}
\setbeamercolor{headline}{fg=殷红}
\setbeamercolor{page number in head/foot}{fg=殷红}
\setbeamercolor{normal text}{bg=牙色}
\setbeamercolor{alerted text}{fg=紫棠}
\setbeamercolor{example text}{fg=松花绿}
% \setbeamercolor{section name}{fg=structure!80!black}
\setbeamerfont{section name}{size=\Huge,family=\lishu}
\setbeamerfont{section title}{size=\Huge,family=\lishu}
\setbeamerfont{section in toc}{family=\lishu}

\usefonttheme[stillsansserifsmall]{serif}

\renewcommand{\CJKrmdefault}{zhfs}

\setbeamerfont{frametitle}{shape=\itshape,family=\lishu,series=\bfseries,size=\LARGE}
% \setbeamercolor{frametitle}{fg=茜色}

\setbeamerfont{title}{family=\lishu,series=\bfseries,size=\huge}

\setbeamertemplate{itemize items}{$\diamond$}
\setbeamertemplate{navigation symbols}{}
\setbeamertemplate{frametitle continuation}[from second]

\newif\if@clouds@alttitlecircle
\newcommand{\alttitlecircle}{%
  \@clouds@alttitlecircletrue%
}

\preto{\maketitle}{%
  \def\title@circle@rotate{45}%
  \def\title@circle@symmetry{none}%
  \if@clouds@alttitlecircle
    \def\title@circle@rotate{0}%
    \def\title@circle@symmetry{h}%
  \fi%
  \newbox{\clouds@title@circle@elem}%
  \savebox{\clouds@title@circle@elem}{%
    \tikzset{pgfornamentstyle/.style={transform shape,rotate=\title@circle@rotate}}%
    \usebeamercolor{headline}%
    \pgfornamenthan[width=1.0471cm,
       color=headline.fg!80!black,
       symmetry=\title@circle@symmetry]{74}%
  }
  \begin{minipage}{4cm}
  \begin{tikzpicture}
    \begin{scope}[decoration={markings, mark=between positions 0 and 1 step 1.0471cm
    with { \node[transform shape,inner sep=0pt,outer sep=0pt]{\usebox{\clouds@title@circle@elem}}; }} ]
    \path [postaction={decorate}] circle (2cm);
    \end{scope}%
    \node {\inserttitlegraphic};
  \end{tikzpicture}%
  \end{minipage}%
  \hfill\titlegraphic{}
  \begin{minipage}{\dimexpr\textwidth-5cm}
}
\appto{\maketitle}{\end{minipage}}


% \setbeamerfont{block title}{series=\centering}
% \addtobeamertemplate{block alerted begin}{}{\centering}
% \addtobeamertemplate{block example begin}{}{\centering}
\addtobeamertemplate{block begin}{
  \preto{\insertblocktitle}{\raisebox{0.75ex}{\pgfornamenthan[width=1em]{44}\space}}
  % \appto{\insertblocktitle}{\raisebox{0.5ex}{\space\pgfornamenthan[width=1em]{44}}}
}{}

\addtobeamertemplate{block alerted begin}{
  \preto{\insertblocktitle}{\raisebox{0.75ex}{\pgfornamenthan[width=1em]{44}\space}}
  % \appto{\insertblocktitle}{\raisebox{0.5ex}{\space\pgfornamenthan[width=1em]{44}}}
}{}

\addtobeamertemplate{block example begin}{
  \preto{\insertblocktitle}{\raisebox{0.75ex}{\pgfornamenthan[width=1em]{44}\space}}
  % \appto{\insertblocktitle}{\raisebox{0.5ex}{\space\pgfornamenthan[width=1em]{44}}}
}{}

\newlength{\clouds@frametitle@rawwidth}%
\newlength{\clouds@frametitle@actualwidth}%
\AtBeginDocument{%
  \newbox{\clouds@title@deco}
  \savebox{\clouds@title@deco}{%
    \usebeamercolor{headline}%
    \pgfornamenthan[width=3.5em,color=headline.fg]{70}%
  }
  \setbeamertemplate{frametitle}{%
    \settowidth{\clouds@frametitle@rawwidth}{\insertframetitle}%
    \pgfmathsetlength{\clouds@frametitle@actualwidth}{max(\clouds@frametitle@rawwidth,\textwidth)}
    \vskip.25em\centering%
    \usebeamerfont{frametitle}\usebeamercolor{frametitle}%
    \begin{minipage}{\clouds@frametitle@actualwidth}%
      \raisebox{0.5ex}{\reflectbox{\usebox{\clouds@title@deco}}}\hfill%
      \parbox{\dimexpr\clouds@frametitle@actualwidth-5em}{\centering\insertframetitle}%
      \hfill\raisebox{0.5ex}{\usebox{\clouds@title@deco}}%
    \end{minipage}\par%
  }

  \newbox{\clouds@smallhuiwen}
  \savebox{\clouds@smallhuiwen}{\usebeamerfont{headline}\usebeamercolor{headline}\pgfornamenthan[width=2.5em,color=headline.fg]{39}}
  \setbeamertemplate{headline}{%
  \tikzset{every node/.append style={inner xsep=0pt}}%
  \begin{tikzpicture}[decoration={markings, mark=between positions 0 and 1 step 2.5em
    with { \node[transform shape]{\usebox{\clouds@smallhuiwen}}; }} ]
  \path [postaction={decorate}] (0,0) -- (\paperwidth,0);
  \end{tikzpicture}
  }

  \newlength{\clouds@progressinheadfoot}
  \setbeamertemplate{footline}{%
  \tikzset{every node/.append style={inner xsep=0pt}}%
  \setlength{\clouds@progressinheadfoot}{%
    \paperwidth * \ratio{\insertframenumber pt}{\inserttotalframenumber pt} - 1.25em%
  }
  \begin{tikzpicture}[decoration={markings, mark=between positions 0 and 1 step 2.5em
    with { \node[transform shape]{\usebox{\clouds@smallhuiwen}}; }} ]
  \path [postaction={decorate}] (0,0) -- (\paperwidth,0);
  \draw[headline.fg!50,line width=0.6pt] (-1.25em,1.25em) -- (\paperwidth,1.25em);
  \clip (-1.25em,2em) rectangle (\paperwidth,0pt);
  \fill[headline.fg] (\clouds@progressinheadfoot,1.25em) circle (2pt);
  \end{tikzpicture}
  }
}

\AtBeginSection{\begin{frame}\sectionpage\end{frame}}
\renewcommand{\thesection}{\chinese{section}}
\setbeamertemplate{section page}{
\usebeamercolor{section title}\usebeamercolor{section name}
\newbox{\clouds@section@circle@elem}
\savebox{\clouds@section@circle@elem}{%
  \usebeamercolor{headline}%
  \pgfornamenthan[width=1.0471cm,color=headline.fg!80!black]{59}%
}
\newlength{\cloud@secname@height}
\settototalheight{\cloud@secname@height}{\usebeamerfont{section name}节}
\begin{tikzpicture}
  \begin{scope}[decoration={markings, mark=between positions 0 and 1 step 1.0471cm
  with { \node[transform shape,inner sep=0pt,outer sep=0pt,draw=none]{\usebox{\clouds@section@circle@elem}}; }} ]
  \path [postaction={decorate}] circle (1.5cm);
  \end{scope}%
  \node[anchor=center,text height=\cloud@secname@height,text=section name.fg,font=\usebeamerfont{section name}] {\thesection};
  \node[anchor=west,text=section title.fg,font=\usebeamerfont{section title},
  text width=\dimexpr\textwidth-5cm\relax] at (2.5cm,0) {\insertsection};
\end{tikzpicture}
}

\RequirePackage{pgfmath}
\newcommand{\randorn}[1]{%
  \pgfmathsetmacro{\myscale}{(rnd * 0.4 + 0.1)}
  \pgfmathsetmacro{\myintensity}{rnd * 20 + 65}
  \pgfmathsetmacro{\mychoice}{int (ifthenelse(rand > 0, 1, -1)}
  % \pgfmathparse{int(rand)}
  \ifnum\mychoice > 0\relax
    \def\myflip{v}
  \else
    \def\myflip{none}
  \fi
  \pgfmathsetmacro{\myx}{rnd * 0.8}
  \pgfmathsetmacro{\myy}{rnd * 0.8}
  \pgfmathtruncatemacro{\myorn}{random(0,1) + #1}
  \node at (\myx * \paperwidth, \myy * \paperheight) {\pgfornamenthan[
  color=normal text.bg!\myintensity!white,symmetry=\myflip,scale=\myscale]{\myorn}};
}
\setbeamertemplate{background}{%
\begin{tikzpicture}
  \clip (0,0) rectangle (\paperwidth,\paperheight);
  \randorn{66}\randorn{68}\randorn{66}\randorn{70}\randorn{68}
\end{tikzpicture}
}

%% 默认寿字纹图案
\titlegraphic{\usebeamercolor{headline}\pgfornamenthan[width=2.5cm,color=headline.fg]{56}}

\endinput
