DefaultLineFilter Class Reference
[Character input filters.]

#import <DefaultLineFilter.h>

Inherits CharacterLineFilter.

Inherited by ANSIDefaultLineFilter, and XTermDefaultLineFilter.

Inheritance diagram for DefaultLineFilter:

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Detailed Description

Base class for default line filters.

This class encompasses behavior common to ANSI and xterm line filters. The default filters behave the same, but the escape and alt-char line filters differ. Subclasses just produce the proper CharacterLineFilter subclasses for those filter types.

Definition at line 15 of file DefaultLineFilter.h.

Public Member Functions
(id)	- initWithTerminal:
	Initialize as the default line filter.
(id)	- processCharacter:
	Process a character in the manner common to ANSI and xterm terminals.
(CharacterLineFilter *)	- escapeLineFilter
	A new instance of the escape-sequence filter handler.
(CharacterLineFilter *)	- altCharLineFilter
	A new instance of the alt-sequence filter handler.
(id)	- processData: [implementation]
	Process many characters of input.

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Member Function Documentation

- (CharacterLineFilter *) altCharLineFilter

A new instance of the alt-sequence filter handler. Return values: nil  because this class is abstract. Reimplemented in ANSIDefaultLineFilter, and XTermDefaultLineFilter. Definition at line 34 of file DefaultLineFilter.m. Referenced by processCharacter:.

- (CharacterLineFilter *) escapeLineFilter

A new instance of the escape-sequence filter handler. Return values: nil  because this class is abstract. Reimplemented in ANSIDefaultLineFilter, and XTermDefaultLineFilter. Definition at line 33 of file DefaultLineFilter.m. Referenced by processCharacter:.

- (id) initWithTerminal: (id)  terminal

Initialize as the default line filter. A DefaultLineFilter has no fallback, so none need be specified, but it must be told of its target terminal. Parameters: [in]  terminal  The target terminal. Return values: self  The receiver. Definition at line 27 of file DefaultLineFilter.m. References CharacterLineFilter::initWithFallback:terminal:. Here is the call graph for this function:

- (id) processCharacter: (unichar)  aCharacter

Process a character in the manner common to ANSI and xterm terminals. If an escape or start-alt-char character comes in, the result of escapeLineFilter or altCharLineFilter is returned. Parameters: [in]  aCharacter  A character (expect ISO-Latin-1) from the host. Return values: self  if the receiver is the next-character handler. escapeLineFilter  if aCharacter was escape. altCharLineFilter  if aCharacter was 0xE. Reimplemented from CharacterLineFilter. Definition at line 36 of file DefaultLineFilter.m. References altCharLineFilter, escapeLineFilter, and CharacterLineFilter::terminalDevice. Here is the call graph for this function:

- (id) processData: (NSData *)  someData   [implementation]

Process many characters of input. This method iterates through the bytes of the given NSData, sending the first in a processCharacter: message to the receiver, and the succeeding ones to whatever line filter is top. The filter for the next character is returned, so always update the filter-stack variable with the result of this method. Parameters: [in]  someData  NSData, characters (expect ISO-Latin-1) from the host. Return values: self  If the next character is to be fed to this filter. CharacterLineFilter  A new filter, falling back to the receiver, if the character changes interpreter state. Reimplemented from CharacterLineFilter. Definition at line 76 of file DefaultLineFilter.m. References length(), and CharacterLineFilter::terminalDevice. Here is the call graph for this function:

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

• /Volumes/Experimental/Users/fritza/U Chicago/Crescat/DefaultLineFilter.h
• /Volumes/Experimental/Users/fritza/U Chicago/Crescat/DefaultLineFilter.m

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