org.serversass.ast

Class MediaFilter

java.lang.Object

org.serversass.ast.MediaFilter

All Implemented Interfaces:

Expression

public class MediaFilter
extends Object
implements Expression

Represents an attribute filter used in a media query like "(min-width: 13px)".

Constructor Summary

Constructors

Constructor and Description
MediaFilter(String name) Creates a new media filter for the given attribute (without ":").

Method Summary

Modifier and Type	Method and Description
Expression	eval(Scope scope, Generator gen) If possible the expression is evaluated and a simplified expression is returned.
Expression	getExpression() Returns the filter expression.
String	getName() Returns the name of the attribute being filtered on
boolean	isConstant() Determines if this expression is constant or if it depends on variables.
void	setExpression(Expression expression) Sets the filter expression
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MediaFilter

public MediaFilter(String name)

Creates a new media filter for the given attribute (without ":").

Parameters:

name - the name of the attribute to filter on

Method Detail

setExpression

public void setExpression(Expression expression)

Sets the filter expression

Parameters:

expression - the filter expression to set

getExpression

public Expression getExpression()

Returns the filter expression.

Returns:

the filter expression previously set

toString

public String toString()

Overrides:

toString in class Object

getName

public String getName()

Returns the name of the attribute being filtered on

Returns:

the name of the filtered attribute

isConstant

public boolean isConstant()

Description copied from interface: Expression

Determines if this expression is constant or if it depends on variables.

Specified by:

isConstant in interface Expression

Returns:

true if the expression is constant, false otherwise

eval

public Expression eval(Scope scope,
                       Generator gen)

Description copied from interface: Expression

If possible the expression is evaluated and a simplified expression is returned.

Specified by:

eval in interface Expression

Parameters:

scope - the scope used to resolve variables.

gen - the generator used to evaluate functions

Returns:

a possibly simplified version of the expression