92 lines
6.7 KiB
Perl
92 lines
6.7 KiB
Perl
package DDG::Goodie::Latex;
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# ABSTRACT: Show the Latex command for a keyword
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use strict;
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use DDG::Goodie;
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triggers startend => 'latex', 'tex';
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zci answer_type => 'Latex';
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zci is_cached => 1;
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my %texCommands = (
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#Math operators
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"and" => ['Logical AND', '\land', '$A \land B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"or" => ['Logical OR', '\lor', '$A \lor B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"not" => ['Logical NOT', '\neg', '$\neg B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"union" => ['Union', '\cup', '$A \cup B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"intersection" => ['Intersection', '\cap', '$A \cap B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"implication" => ['Implication', '\rightarrow', '$A \rightarrow B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"iff" => ['If and Only If', '\leftrightarrow', '$A \leftrightarrow B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"if and only if" => ['If and Only If', '\leftrightarrow', '$A \leftrightarrow B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"subset" => ['Subset or Subset Equal', '\subset or \subseteq', '$A \subset B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"less than or equal" => ['Logical Less Than or Equal', '\leq', '$A \leq B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"less than" => ['Logical Less Than', '<' , '$A < B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Symbols'],
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"<=" => ['Logical Less Than or Equal', '\leq', '$A \leq B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Symbols'],
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"<" => ['Logical Less Than', '<' , '$A < B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Symbols'],
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"greater than or equal" => ['Logical Greater Than or Equal', '\geq', '$A \geq B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"greater than" => ['Logical Greater Than', '>' , '$A > B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Symbols'],
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">=" => ['Logical Greater Than or Equal', '\geq', '$A \geq B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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">" => ['Logical Greater Than', '>' , '$A > B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Symbols'],
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#math functions
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"sum" => ['Summation', '\sum_{lower}^{upper}', '$\sum_{i=0}^{10} x^{2}$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Sums_and_integrals'],
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"summation" => ['Summation', '\sum_{lower}^{upper}', '$\sum_{i=0}^{10} x^{2}$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Sums_and_integrals'],
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"fraction" => ['Fraction', '\frac{numerator}{denominator}', '$\frac{A}{B}$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Fractions_and_Binomials'],
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"limit" => ['Limit', '\lim{bound}', '$\lim{x \to +\infty} 2x^{2}$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Operators'],
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"integral" => ['Integral', '\int_lowerbound^upperbound', '$\int_a^b f(x)dx$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Sums_and_integrals'],
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"square root" => ['Square Root', '\sqrt[n][x]', '$\sqrt[n][x]$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Roots'],
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#math symbols
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"infinity" => ['Infinity', '\infty', '$\infty$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Operators'],
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"dot" => ['Center Dots', '\cdot or \cdots', '$A+ \cdots +B$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Dots'],
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"alpha" => ['Alpha', '\alpha', '$\alpha$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Greek_letters'],
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"delta" => ['Delta', '\delta (lowercase) or \Delta (uppercase)', '$\delta$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Greek_letters'],
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"zeta" => ['Zeta', '\zeta', '$\zeta$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Greek_letters'],
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"lambda" => ['Lambda', '\lambda (lowercase) or \Lambda (uppercase)', '$\lambda$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Greek_letters'],
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"xi" => ['Xi', '\xi (lowercase) or \Xi (uppercase)', '$\xi$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Greek_letters'],
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"sigma" => ['Sigma', '\sigma (lowercase) or \Sigma (uppercase)', '$\sigma$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Greek_letters'],
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"phi" => ['Phi', '\phi (lowercase) or \Phi (uppercase)', '$\phi$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Greek_letters'],
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"omega" => ['Omega', '\omega (lowercase) or \Omega (uppercase)', '$\omega$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Greek_letters'],
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"theta" => ['Theta', '\theta (lowercase) or \Theta (uppercase)', '$\theta$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Greek_letters'],
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#other
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"date" => ['Date', '\today', '\today', 'https://en.wikibooks.org/wiki/LaTeX/Document_Structure#Top_matter'],
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"new line" => ['Newline', '\\', 'text... \\', 'https://en.wikibooks.org/wiki/LaTeX/Paragraph_Formatting#Manual_breaks'],
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"subscript" => ['Subscript', '_{x}', '$H_{2}O$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Powers_and_indices'],
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"superscript" => ['Superscript', '^{x}', '$x^{2}$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#Powers_and_indices'],
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"temperature" => ['Temperature', '^{\circ}', '$25^{circ}\mathrm{c}$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"temp" => ['Temperature', '^{\circ}', '$25^{circ}\mathrm{c}$', 'https://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols'],
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"line" => ['Horizontal Line', '\hrulefill', '\hrulefill', 'https://en.wikibooks.org/wiki/LaTeX/Lengths#Fill_the_rest_of_the_line'],
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);
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sub more_at {
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return "<a href='$_[0]' class='zci__more-at--info'>More at Wikibooks</a>";
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}
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sub build_html {
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# builds a string to display using the given $command
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# and $usage
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return "<div><span class='latex--key'>LaTeX command:</span> <pre class='latex--value'>$_[0]</pre></div><div><span class='latex--key'>Example:</span> <pre class='latex--value'>$_[1]</pre></div>" . more_at($_[2]);
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}
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handle remainder => sub {
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my $key = lc $_; #set key to lower case
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my $command = $texCommands{$key}[1]; #get tex command from hash
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if($command) { #check to see if the key was in the table
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my $heading = $texCommands{$key}[0];
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my $usage = $texCommands{$key}[2];
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my $more = $texCommands{$key}[3];
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my $text = "LaTeX command: $command\nExample: $usage";
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#build the html string to display
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my $html = build_html($command, $usage, $more);
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return $text, html => $html, heading => "$heading (LaTeX)";
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}
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return; #return if no key was found
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};
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1;
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