Class: I

Defined in:	lib/Engine.coffee
Inherits:	Operation

Overview

A simple insert-type operation.

An insert operation is always positioned between two other insert operations. Internally this is realized as associative lists, whereby each insert operation has a predecessor and a successor. For the sake of efficiency we maintain two lists: - The short-list (abbrev. sl) maintains only the operations that are not deleted - The complete-list (abbrev. cl) maintains all operations

Direct Known Subclasses

Delimiter

Instance Method Summary

# (void) getLength() Retrieve the effective length of the $content of this operation.
# (void) isDeleted() If isDeleted() is true this operation won't be maintained in the sl
# (void) getDistanceToOrigin() The amount of positions that this operation was moved to the right.
# (void) update_sl() Update the short list TODO
# (void) toJson() Convert all relevant information of this operation into the json-format.
# (void) execute(current_position) The result will be concatenated with the results from the other insert operations in order to retrieve the content of the engine.
# (void) IT() Include this operation in the associative lists.

Inherited Method Summary

Methods inherited from Operation

#getUid #execute

Constructor Details

# (void) constructor(content, creator, op_number, prev_cl, next_cl)

Parameters:

content ( Value ) — The value of the insert operation. E.g. for strings content is a char.
creator ( Object ) — A unique user identifier
op_number ( Integer ) — This Number was assigned via getOperationCounter().
prev_cl ( Operation ) — The predecessor of this operation in the complete-list (cl)
next_cl ( Operation ) — The successor of this operation in the complete-list (cl)

Instance Method Details

# (void) getLength()

Retrieve the effective length of the $content of this operation.

# (void) isDeleted()

If isDeleted() is true this operation won't be maintained in the sl

# (void) getDistanceToOrigin()

The amount of positions that this operation was moved to the right.

# (void) update_sl()

Update the short list TODO

# (void) toJson()

Convert all relevant information of this operation into the json-format. This result can be send to other clients.

# (void) execute(current_position)

The result will be concatenated with the results from the other insert operations in order to retrieve the content of the engine.