add \colorcell function

Author: zhuyaoyu

Diff for: .gitignore

@@ -275,3 +275,6 @@ TSWLatexianTemp*
 # Makeindex log files
 *.lpz
 *.pdf
+
+# Testing codes
+test.*

Diff for: tikz-minesweeper.docs.tex

@@ -197,6 +197,30 @@
             \quad
             \subfloat[\texttt{\textbackslash tlboard}]{\begin{tikzpicture}\begin{scope}[scale=3]\tlboard{1}{1}\end{scope}\end{tikzpicture}}
         \end{figure}
+    	\item[\texttt{\textbackslash colorcell\{颜色\}\{位置\}}] 将[位置]位置的方格染色为[颜色]颜色.
+    	\begin{multicols}{2}
+\begin{verbatim}
+\begin{tikzpicture}
+	\board{3}{5}
+	\row{0}{f{20}123}
+	\row{1}{A-405}
+	\row{2}{m-678}
+	\colorcell{green}{(1,1),(1:2,3:5)}
+\end{tikzpicture}
+\end{verbatim}
+    		\columnbreak
+    		\begin{figure}[H]
+    			\centering
+    			\begin{tikzpicture}
+    				\board{3}{5}
+    				\row{0}{f{20}123}
+    				\row{1}{A-405}
+    				\row{2}{m-678}
+    				\colorcell{green}{(1,1),(1:2,3:5)}
+    			\end{tikzpicture}
+    			\caption*{方格染色}
+    		\end{figure}
+    	\end{multicols}
     \end{itemize}
 
 \end{document}

Diff for: tikz-minesweeper.sty

@@ -2,6 +2,7 @@
 [2022/01/07, v0.1.0]
 \RequirePackage{tikz}
 \RequirePackage{expl3}
+\RequirePackage{xstring}
 
 % Color tables
 \definecolor{color0}{RGB}{192,192,192}
@@ -121,6 +122,48 @@
     \newcommand{\row}[2]{\element_row:nn {#1}{#2}}
 \ExplSyntaxOff
 
+\newcommand{\colorcell}[2]{
+	\newcounter{i1}
+	\newcounter{i2}
+	\newcounter{j1}
+	\newcounter{j2}
+	\begin{scope}
+		\foreach \x in {#2}{
+			\StrLen{\x}[\len]
+			\IfBeginWith{\x}{(}{
+				\StrMid{\x}{2}{\numexpr\len-1}[\y] % remove parenthesis
+				\StrBefore{\y}{,}[\istr]
+				\StrBehind{\y}{,}[\jstr]
+			}{
+				\StrBefore{\x}{,}[\istr]
+				\StrBehind{\x}{,}[\jstr]			
+			}
+			
+			\IfSubStr{\istr}{:}{
+				\StrBefore{\istr}{:}[\tmp1]
+				\setcounter{i1}{\tmp1}
+				\StrBehind{\istr}{:}[\tmp2]
+				\setcounter{i2}{\tmp2}
+			}{
+				\setcounter{i1}{\istr}
+				\setcounter{i2}{\istr}
+			}
+			
+			\IfSubStr{\jstr}{:}{
+				\StrBefore{\jstr}{:}[\tmp1]
+				\setcounter{j1}{\tmp1}
+				\StrBehind{\jstr}{:}[\tmp2]
+				\setcounter{j2}{\tmp2}
+			}{
+				\setcounter{j1}{\jstr}
+				\setcounter{j2}{\jstr}
+			}
+
+			\fill[opacity=0.2,#1] (\numexpr16*\value{j1}-16\relax, \numexpr-16*\value{i1}+16\relax) rectangle (\numexpr16*\value{j2}\relax, \numexpr-16*\value{i2}\relax);
+		}
+	\end{scope}
+}
+
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