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Contents
# frozen_string_literal: true
module Vedeu
module Editor
# Manipulate the lines of an Vedeu::Editor::Document.
#
# @api private
#
class Delete
include Vedeu::Common
# @param (see #initialize)
# @return [Vedeu::Editor::Line|Vedeu::Editor::Lines]
def self.from(collection, index = nil, size = 0)
new(collection, index, size).delete
end
# Returns a new instance of Vedeu::Editor::Delete.
#
# @param collection [Vedeu::Editor::Line|Vedeu::Editor::Lines]
# @param index [Fixnum]
# @param size [Fixnum]
# @return [Vedeu::Editor::Delete]
def initialize(collection, index = nil, size = 0)
@collection = collection
@index = index
@size = size
end
# @return [Vedeu::Editor::Line|Vedeu::Editor::Lines]
def delete
return collection if collection.empty? || negative_index?
return collection.dup.tap { |c| c.slice!(index) } if index
return collection.dup.tap(&:pop) if lines?
return collection.chop if line?
end
protected
# @!attribute [r] collection
# @return [Vedeu::Editor::Line|Vedeu::Editor::Lines]
attr_reader :collection
# @!attribute [r] size
# @return [Fixnum]
attr_reader :size
private
# @return [Fixnum]
def index
return nil unless @index
@index = size - 1 if @index > size
@index
end
# If true, we are dealing with a {Vedeu::Editor::Line} object.
#
# @return [Boolean]
def line?
string?(collection)
end
# If true, we are dealing with a {Vedeu::Editor::Lines}
# collection.
#
# @return [Boolean]
def lines?
array?(collection)
end
# Returns a boolean indicating whether the index was given or
# negative.
#
# @return [Boolean]
def negative_index?
index && index < 0
end
end # Delete
end # Editor
end # Vedeu
Version data entries
19 entries across 19 versions & 1 rubygems