163 lines
3.3 KiB
TeX
163 lines
3.3 KiB
TeX
%%
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%% iantheorem package:
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%% Ian's customized theorem command
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%%
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%% boolean to signal that this package was loaded
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\newif\ifiantheo
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%% TeX format
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\NeedsTeXFormat{LaTeX2e}[1995/12/01]
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%% package name
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\ProvidesPackage{iantheo}[2016/11/10]
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%% options
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\newif\ifsectionintheo
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\DeclareOption{section_in_theo}{\sectionintheotrue}
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\DeclareOption{no_section_in_theo}{\sectionintheofalse}
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\newif\ifsubsectionintheo
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\DeclareOption{subsection_in_theo}{\subsectionintheotrue}
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\DeclareOption{no_subsection_in_theo}{\subsectionintheofalse}
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\def\iantheo@defaultoptions{
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\ExecuteOptions{section_in_theo, no_subsection_in_theo}
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\ProcessOptions
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%%% reset at every new section
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\ifsectionintheo
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\let\iantheo@oldsection\section
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\gdef\section{\setcounter{theocount}{0}\iantheo@oldsection}
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\fi
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%% reset at every new subsection
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\ifsubsectionintheo
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\let\iantheo@oldsubsection\subsection
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\gdef\subsection{\setcounter{theocount}{0}\iantheo@oldsubsection}
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\fi
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}
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%% delimiters
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\def\delimtitle#1{
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\par%
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\leavevmode%
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\raise.3em\hbox to\hsize{%
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\lower0.3em\hbox{\vrule height0.3em}%
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\hrulefill%
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\ \lower.3em\hbox{#1}\ %
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\hrulefill%
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\lower0.3em\hbox{\vrule height0.3em}%
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}%
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\par\penalty10000%
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}
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%% callable by ref
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\def\delimtitleref#1{
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\par%
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%
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\ifdefined\ianclass%
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% hyperref anchor%
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\hrefanchor%
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% define tag (for \label)%
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\xdef\tag{#1}%
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\fi%
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%
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\leavevmode%
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\raise.3em\hbox to\hsize{%
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\lower0.3em\hbox{\vrule height0.3em}%
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\hrulefill%
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\ \lower.3em\hbox{\bf #1}\ %
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\hrulefill%
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\lower0.3em\hbox{\vrule height0.3em}%
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}%
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\par\penalty10000%
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}
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%% no title
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\def\delim{
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\par%
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\leavevmode\raise.3em\hbox to\hsize{%
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\lower0.3em\hbox{\vrule height0.3em}%
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\hrulefill%
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\lower0.3em\hbox{\vrule height0.3em}%
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}%
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\par\penalty10000%
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}
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%% end delim
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\def\enddelim{
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\par\penalty10000%
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\leavevmode%
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\raise.3em\hbox to\hsize{%
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\vrule height0.3em\hrulefill\vrule height0.3em%
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}%
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\par%
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}
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%% theorem
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% counter
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\newcounter{theocount}
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% booleans (write section or subsection in equation number)
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\def\theo#1{
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\stepcounter{theocount}
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\ifdefined\ianclass
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% hyperref anchor
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\hrefanchor
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\fi
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% the number
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\def\formattheo{\thetheocount}
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% add subsection number
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\ifsubsectionintheo
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\let\tmp\formattheo
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\edef\formattheo{\thesubsectioncount.\tmp}
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\fi
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% add section number
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\ifsectionintheo
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\let\tmp\formattheo
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\edef\formattheo{\sectionprefix\thesectioncount.\tmp}
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\fi
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% define tag (for \label)
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\xdef\tag{\formattheo}
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% write
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\delimtitle{\bf #1 \formattheo}
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}
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\let\endtheo\enddelim
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%% theorem headers with name
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\def\theoname#1#2{
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\theo{#1}\hfil({\it #2})\par\penalty10000\medskip%
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}
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%% qed symbol
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\def\qedsymbol{$\square$}
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\def\qed{\penalty10000\hfill\penalty10000\qedsymbol}
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%% compatibility with article class
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\ifdefined\ianclasstrue
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\relax
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\else
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\def\thesectioncount{\thesection}
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\def\thesubsectioncount{\thesubsection}
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\def\sectionprefix{}
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\fi
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%% prevent page breaks after displayed equations
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\newcount\prevpostdisplaypenalty
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\def\nopagebreakaftereq{
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\prevpostdisplaypenalty=\postdisplaypenalty
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\postdisplaypenalty=10000
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}
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%% back to previous value
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\def\restorepagebreakaftereq{
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\postdisplaypenalty=\prevpostdisplaypenalty
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}
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%% end
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\iantheo@defaultoptions
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\endinput
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