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de.dante.extex.interpreter.primitives.register.font
Class NullfontPrimitive

java.lang.Object
  extended byde.dante.extex.interpreter.type.AbstractCode
      extended byde.dante.extex.interpreter.primitives.register.font.NullfontPrimitive
All Implemented Interfaces:
Code, ComparableCode, FontConvertible, Localizable, java.io.Serializable
public class NullfontPrimitive
extends AbstractCode
implements FontConvertible, ComparableCode

This class provides an implementation for the primitive \nullfont.

The Primitive \nullfont

TODO missing documentation

Syntax

The formal description of this primitive is the following: 
    \nullfont

Examples

    \font123=\nullfont

Version:
$Revision: 1.10 $
Author:
Gerd Neugebauer
See Also:
Serialized Form

Field Summary
protected static long serialVersionUID
          The constant serialVersionUID contains the id for serialization.
 
Constructor Summary
NullfontPrimitive(java.lang.String name)
          Creates a new object.
 
Method Summary
 boolean compare(Token token, Context context)
          Compare the code with some other code.
 Font convertFont(Context context, TokenSource source, Typesetter typesetter)
          Convert some primitive value into a font.
 void execute(Flags prefix, Context context, TokenSource source, Typesetter typesetter)
          This method takes the first token and executes it.
 
Methods inherited from class de.dante.extex.interpreter.type.AbstractCode
enableLocalization, getLocalizer, getName, isIf, isOuter, printable, printableControlSequence, readResolve, setName, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

serialVersionUID

protected static final long serialVersionUID
The constant serialVersionUID contains the id for serialization.

See Also:
Constant Field Values
Constructor Detail

NullfontPrimitive

public NullfontPrimitive(java.lang.String name)
Creates a new object.

Parameters:
name - the name of the primitive
Method Detail

compare

public boolean compare(Token token,
                       Context context)
                throws InterpreterException
Description copied from interface: ComparableCode
Compare the code with some other code.

Specified by:
compare in interface ComparableCode
Parameters:
token - the token to compare to
context - the interpreter context
Returns:
true iff the code is equivalent according to the semantics of \ifx
Throws:
InterpreterException - in case of an error
See Also:
ComparableCode.compare( de.dante.extex.scanner.type.token.Token, de.dante.extex.interpreter.context.Context)

convertFont

public Font convertFont(Context context,
                        TokenSource source,
                        Typesetter typesetter)
                 throws InterpreterException
Description copied from interface: FontConvertible
Convert some primitive value into a font.

Specified by:
convertFont in interface FontConvertible
Parameters:
context - the interpreter context
source - the source for new tokens
typesetter - the typesetter
Returns:
the converted value
Throws:
InterpreterException - In case of an error
See Also:
FontConvertible.convertFont( de.dante.extex.interpreter.context.Context, de.dante.extex.interpreter.TokenSource, de.dante.extex.typesetter.Typesetter)

execute

public void execute(Flags prefix,
                    Context context,
                    TokenSource source,
                    Typesetter typesetter)
             throws InterpreterException
Description copied from interface: Code
This method takes the first token and executes it. The result is placed on the stack. This operation might have side effects. To execute a token it might be necessary to consume further tokens.

Specified by:
execute in interface Code
Overrides:
execute in class AbstractCode
Throws:
InterpreterException
See Also:
Code.execute( de.dante.extex.interpreter.Flags, de.dante.extex.interpreter.context.Context, de.dante.extex.interpreter.TokenSource, de.dante.extex.typesetter.Typesetter)
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