% todonotes.sty
% Author: Henrik Skov Midtiby
% Source: Midtiby notes:
%    http://midtiby.blogspot.com/2008/05/updated-todonotes-package.html
% 2007-09-17: Initial release of the code
% 2008-04-17: The first version of the package
% 2008-05-15: Updated the option handling of the package
% 2008-05-16: Slightly modified by Kjell Magne Fauske to support notes 
%             in the left margin (for documentstyle book). 
% 2008-05-28: Added a missingfigure command
% 2008-06-10: Made a dependency on the calc package
% 2008-07-11: Delayed the requirements for the hyperref package
%             untill \begin{document} and added an optional argument
%             to the todo command for adding inline todonotes (Idea
%             from Patrick Toche)
% 2008-07-15: Added some options to the todo macro (Idea: Patrick
%             Toche) and made the \listoftodos point at the inserted
%             todos and not only the current / previous section, 
%             subsection or figure using the \phantomsection macro.
% 2008-07-28: Modified the behaviour of the inline todonotes, to
%             avoid empty lines around the inline todonotes.
%             Added the option colorinlistoftodos which inserts a
%             small box with the used fillcolor of the todonotes in
%             the list of todos.
% 2008-07-30: Fixed a bug with the disable option to the package.
%
% ====================
% Part: Identification
% ====================
\ProvidesPackage{todonotes}[2008/07/30]


% ==============================
% Part: The package loading part
% ==============================
% Loads the packages that todonotes depends on.
\RequirePackage{ifthen}
\RequirePackage{xkeyval}
\RequirePackage{hyperref}
\RequirePackage{xcolor}
%\AtBeginDocument{\RequirePackage{hyperref}}
\RequirePackage{tikz}
\RequirePackage{calc}



% ==================
% Part: Initial code
% ==================
% Here the default values are set
\newcommand{\@backgroundcolor}{orange}
\newcommand{\@bordercolor}{black}
\newcommand{\@textwidth}{\marginparwidth}


% ================================================
% Part: The declaration of options for the package
% ================================================
% In this part the various options for
% the package are defined.

% Make it possible to disable the functionality
% of the package. If this option is given, the
% commands \todo{} and \listoftodos are defined
% as commands with no effect. (But you can still
% compile you document with these commands).
\newif{\ifdisabled}
\DeclareOptionX{disable}{\disabledtrue}

% Show small boxes in the list of todos with the color of the
% inserted todonotes.
\newif{\ifcolorinlistoftodos}
\DeclareOptionX{colorinlistoftodos}{\colorinlistoftodostrue}

% The default style behaves bad when compiled
% with latex (some text placement problems).
% The dvistyle option, changes the visual behavior
% to avoid this text placement problem.
\newif{\ifdviStyle}
\DeclareOptionX{dvistyle}{\dviStyletrue}

% Make the background color of the notes as
% an option.
\define@key{todonotes.sty}%
	{color}{\renewcommand{\@backgroundcolor}{#1}}

% Make the color of the notes box color as
% an option.
\define@key{todonotes.sty}%
	{bordercolor}{\renewcommand{\@bordercolor}{#1}}

% Make the text width as an option.
\define@key{todonotes.sty}%
	{textwidth}{\renewcommand{\@textwidth}{#1}}

% Finally process the given options.
\ProcessOptionsX


% ============================================================
% Part: The declaration of options for commands in the package
% ============================================================
% In this part the various options for 
% commands in the package are defined.


% Code for handling options to the todo macro
% Set an arbitrarily fill color
\newcommand{\fillcolor}{}%
\define@key{todonotes}{color}{\renewcommand{\fillcolor}{#1}}%

% Set a relative font size
\newcommand{\sizecommand}{}%
\define@key{todonotes}{size}{\renewcommand{\sizecommand}{#1}}%

% Should the todo item be included in the list of todos?
\newif\ifappendtolistoftodos%
\define@key{todonotes}{list}[]{\appendtolistoftodostrue}%
\define@key{todonotes}{nolist}[]{\appendtolistoftodosfalse}%

% Should the todo item be displayed inline?
\newif\ifinlinenote%
\define@key{todonotes}{inline}[]{\inlinenotetrue}%
\define@key{todonotes}{noinline}[]{\inlinenotefalse}%

% Should the note in the margin be connected to the insertion point
% in the text??
\newif\ifline%
\define@key{todonotes}{line}[]{\linetrue}%
\define@key{todonotes}{noline}[]{\linefalse}%

% Preset values of the options
\presetkeys
	{todonotes}
	{color=\@backgroundcolor, noinline, 
	line, list, size=\normalsize}{}%


% ========================
% Part: The main code part
% ========================
\ifdisabled
	% If the option "disable" was passed to the package
	% define two empty commands.
	\newcommand{\listoftodos}{}
	\newcommand{\todo}[2][]{}
	\newcommand{\missingfigure}[1]{}

\else % \ifdisabled

% Define the list of todos command
\newcommand{\listoftodos}
	{\section*{Todo list} \@starttoc{tdo}}
% Set the appearance of the list of todos
\newcommand{\l@todo}
	{\@dottedtocline{1}{0em}{2.3em}}


% Define styles used by the todo command
\tikzstyle{notestyle} = [
	draw=\@bordercolor,
	line width=0.5pt,
	text width = \@textwidth - 1.6 ex - 1pt,
	inner sep = 0.8 ex]
\tikzstyle{notestyleleft} = [
	notestyle, 
	left]
\tikzstyle{connectstyle} = [
	thick]
\tikzstyle{inlinenotestyle} = [
	notestyle, 
	text width=\textwidth - 1.6 ex - 1 pt]


% Define the todo command
\newcommand{\todo}[2][]{%
\setkeys{todonotes}{#1}%
% Add to todo list
\ifappendtolistoftodos%
	\phantomsection%
	\ifcolorinlistoftodos%
		\addcontentsline{tdo}{todo}{\protect{%
			\colorbox{\fillcolor}{\textcolor{\fillcolor}{\tiny i}} %
			#2}}%
	\else%
		\addcontentsline{tdo}{todo}{\protect{#2}}%
	\fi%
\fi%
%
\ifinlinenote%
	\ifdviStyle%
	    {\par\noindent\tikz[remember picture] \draw node[inlinenotestyle, %
		fill=\fillcolor] {};\par}%
		{\noindent \sizecommand #2}%
	    {\par\noindent\tikz[remember picture] \draw node[inlinenotestyle, %
		fill=\fillcolor] {};\par}%
	\else%
	    {\par\noindent\tikz[remember picture] \draw node[inlinenotestyle, %
		fill=\fillcolor] {\sizecommand #2};\par}%
	\fi%
\else%
%
% Remember where we are
\begin{tikzpicture}[remember picture, baseline=-0.75ex]%
    \node [coordinate] (inText) {};%
\end{tikzpicture}%
%
% Make the margin par
\marginpar[{% Draw note in left margin
\ifdviStyle%
    % Using dviStyle
    \tikz[remember picture] \draw node[notestyle, fill=\fillcolor] {}; \\ %
    \begin{minipage}{\@textwidth}%
    \sizecommand #2%
    \end{minipage} \\%
    \tikz[remember picture] \draw node[notestyle, fill=\fillcolor] (inNote) {};%
	\ifline%
		\begin{tikzpicture}[remember picture, overlay]%
			\draw[connectstyle, draw=\fillcolor]%
			([yshift=-0.2cm] inText)%
			-| ([xshift=0.2cm] inNote.east)%
			-| (inNote.east);%
		\end{tikzpicture}%
	\fi%
\else%
    % Using normal style (non dviStyle)
    \tikz[remember picture] \draw node[notestyle, fill=\fillcolor]
(inNote) {\sizecommand #2};%
	\ifline%
		\begin{tikzpicture}[remember picture, overlay]%
			\draw[connectstyle, draw=\fillcolor]%
			([yshift=-0.2cm] inText)%
			-| ([xshift=0.2cm] inNote.east)%
			-| (inNote.east);%
		\end{tikzpicture}%
	\fi%
\fi% Ending \ifdviStyle
}]{% Draw note in right margin
\ifdviStyle%
    % Using dviStyle
    \tikz[remember picture] \draw node[notestyle, fill=\fillcolor] {}; \\ %
    \begin{minipage}{\@textwidth}%
    \sizecommand #2%
    \end{minipage} \\%
    \tikz[remember picture] \draw node[notestyle, fill=\fillcolor] (inNote) {};%
	\ifline%
		\begin{tikzpicture}[remember picture, overlay]%
			\draw[connectstyle, draw=\fillcolor]%
			([yshift=-0.2cm] inText)%
			-| ([xshift=-0.2cm] inNote.west)%
			-| (inNote.west);%
		\end{tikzpicture}%
	\fi%
    \else%
    % Using normal style (non dviStyle)
    \tikz[remember picture] \draw node[notestyle, fill=\fillcolor]
(inNote) {\sizecommand #2};%
	\ifline%
		\begin{tikzpicture}[remember picture, overlay]%
			\draw[connectstyle, draw=\fillcolor]%
			([yshift=-0.2cm] inText)%
			-| ([xshift=-0.2cm] inNote.west)%
			-| (inNote.west);%
		\end{tikzpicture}%
	\fi%
\fi% Ending \ifdviStyle
}%
\fi%
}%

\newcommand{\missingfigure}[2]{
\addcontentsline{tdo}{todo}{Figure: \protect{#1}}%
\begin{tikzpicture}
\draw[fill=black!40, draw = white, line width=0pt] 
	(-3, -2.5) rectangle +(\textwidth, 4cm);
\draw (3, 0) node[right, text width=4cm] {#1};
\draw[red, fill=white, rounded corners = 5pt, line width=10pt] 
	(30:2cm) -- (150:2cm) -- (270:2cm) -- cycle;
\draw (0, 0.3) node {Missing};
\draw (0, -0.3) node {figure};
\end{tikzpicture}
}% Ending \missingfigure command
\fi % Ending \ifdisabled