Create LaTeX code for prettyprinting a mathematical expression (for example via MathJax) More...

Inheritance diagram for MathParser\Interpreting\LaTeXPrinter:

Public Member Functions
	__construct ()
	Constructor. More...

	visitExpressionNode (ExpressionNode $node)
	Generate LaTeX code for an ExpressionNode. More...

	visitNumberNode (NumberNode $node)
	Generate LaTeX code for a NumberNode. More...

	visitIntegerNode (IntegerNode $node)
	Interface function for visiting IntegerNodes. More...

	visitRationalNode (RationalNode $node)
	Interface function for visiting RationalNodes. More...

	visitVariableNode (VariableNode $node)
	Generate LaTeX code for a VariableNode. More...

	visitFunctionNode (FunctionNode $node)
	Generate LaTeX code for a FunctionNode. More...

	visitConstantNode (ConstantNode $node)
	Generate LaTeX code for a ConstantNode. More...

	parenthesize (Node $node, ExpressionNode $cutoff, $prepend='')
	Add parentheses to the LaTeX representation of $node if needed. More...

	bracesNeeded (Node $node)
	Add curly braces around the LaTex representation of $node if needed. More...

Private Attributes
	$lexer
	StdMathLexer $lexer.

Detailed Description

Create LaTeX code for prettyprinting a mathematical expression (for example via MathJax)

Implementation of a Visitor, transforming an AST into a string giving LaTeX code for the expression.

The class in general does not generate the best possible LaTeX code, and needs more work to be used in a production setting.

Example:

$parser = new StdMathParser();
$f = $parser->parse('exp(2x)+xy');
printer = new LaTeXPrinter();
result = $f->accept($printer);    // Generates "e^{2x}+xy"

Note that surrounding $, $$ or \begin{equation}..\end{equation} has to be added manually.

Constructor & Destructor Documentation

MathParser\Interpreting\LaTeXPrinter::__construct ( )

Constructor.

Create a LaTeXPrinter.

Member Function Documentation

MathParser\Interpreting\LaTeXPrinter::bracesNeeded ( Node $node )

Add curly braces around the LaTex representation of $node if needed.

Nodes representing a single ConstantNode, VariableNode or NumberNodes (0–9) are returned as-is. Other Nodes get curly braces around their LaTeX code.

Parameters

Node $node AST to parse

Return values

string

MathParser\Interpreting\LaTeXPrinter::parenthesize	(	Node	$node,
		ExpressionNode	$cutoff,
			$prepend = `''`
	)

Add parentheses to the LaTeX representation of $node if needed.

Parameters

Node	$node	The AST to typeset
ExpressionNode	$cutoff	A token representing the precedence of the parent node. Operands with a lower precedence have parentheses added.
bool	$addSpace	Flag determining whether an additional space should be added at the beginning of the returned string.

Return values

string

MathParser\Interpreting\LaTeXPrinter::visitConstantNode ( ConstantNode $node )

Generate LaTeX code for a ConstantNode.

Create a string giving LaTeX code for a ConstantNode. pi typesets as \pi and e simply as e.

Exceptions

UnknownConstantException for nodes representing other constants.

Parameters

ConstantNode $node AST to be typeset

Return values

string

Implements MathParser\Interpreting\Visitors\Visitor.

MathParser\Interpreting\LaTeXPrinter::visitExpressionNode ( ExpressionNode $node )

Generate LaTeX code for an ExpressionNode.

Create a string giving LaTeX code for an ExpressionNode (x op y) where op is one of +, -, *, / or ^

Typesetting rules:

Adds parentheses around each operand, if needed. (I.e. if their precedence lower than that of the current Node.) For example, the AST (^ (+ 1 2) 3) generates (1+2)^3 but (+ (^ 1 2) 3) generates 1^2+3 as expected.
Multiplications are typeset implicitly (* x y) returns xy or using \cdot if the first factor is a FunctionNode or the (left operand) in the second factor is a NumberNode, so (* x 2) return x \cdot 2 and (* (sin x) x) return \sin x \cdot x (but (* x (sin x)) returns x\sin x)
Divisions are typeset using \frac
Exponentiation adds braces around the power when needed.

Parameters

ExpressionNode $node AST to be typeset

Return values

string

Implements MathParser\Interpreting\Visitors\Visitor.

MathParser\Interpreting\LaTeXPrinter::visitFunctionNode ( FunctionNode $node )

Generate LaTeX code for a FunctionNode.

Create a string giving LaTeX code for a functionNode.

Typesetting rules:

sqrt(op) is typeset as \sqrt{op} -exp(op)is either typeset ase^{op}, ifopis a simple expression or as(op)` for more complicated operands.

Parameters

FunctionNode $node AST to be typeset

Return values

string

Implements MathParser\Interpreting\Visitors\Visitor.

MathParser\Interpreting\LaTeXPrinter::visitIntegerNode ( IntegerNode $node )

Interface function for visiting IntegerNodes.

Parameters

IntegerNode $node Node to visit.

Implements MathParser\Interpreting\Visitors\Visitor.

MathParser\Interpreting\LaTeXPrinter::visitNumberNode ( NumberNode $node )

Generate LaTeX code for a NumberNode.

Create a string giving LaTeX code for a NumberNode. Currently, there is no special formatting of numbers.

Parameters

NumberNode $node AST to be typeset

Return values

string

Implements MathParser\Interpreting\Visitors\Visitor.

MathParser\Interpreting\LaTeXPrinter::visitRationalNode ( RationalNode $node )

Interface function for visiting RationalNodes.

Parameters

RationalNode $node Node to visit.

Implements MathParser\Interpreting\Visitors\Visitor.

MathParser\Interpreting\LaTeXPrinter::visitVariableNode ( VariableNode $node )

Generate LaTeX code for a VariableNode.

Create a string giving LaTeX code for a VariableNode. Currently, there is no special formatting of variables.

Parameters

VariableNode $node AST to be typeset

Return values

string

Implements MathParser\Interpreting\Visitors\Visitor.

The documentation for this class was generated from the following file:

src/MathParser/Interpreting/LaTeXPrinter.php

Public Member Functions

Private Attributes

Detailed Description

Example:

Constructor & Destructor Documentation

Member Function Documentation

Typesetting rules:

Typesetting rules: