Sha256: 8379fe06a6d54e312039fc79f696b57fc5f4cc4fada99448131a225b3cc6955a
Contents?: true
Size: 1.57 KB
Versions: 8
Compression:
Stored size: 1.57 KB
Contents
module Vedeu
module Editor
# Crop the lines to the visible area of the document, as defined by the
# geometry provided.
#
class Cropper
# Returns a new instance of Vedeu::Editor::Cropper.
#
# @param lines [Vedeu::Editor::Lines]
# @param height [Fixnum]
# @param width [Fixnum]
# @param ox [Fixnum]
# @param oy [Fixnum]
# @return [Vedeu::Editor::Cropper]
def initialize(lines:, height:, width:, ox:, oy:)
@lines = lines
@height = height
@width = width
@ox = ox
@oy = oy
end
# Returns the lines cropped.
#
# @note If there are no lines of content, we return an empty array. If
# there are any empty lines, then they are discarded.
#
# @return [Array<void>]
def cropped
lines.map { |line| columns(line) }
end
protected
# @!attribute [r] height
# @return [Fixnum]
attr_reader :height
# @!attribute [r] width
# @return [Fixnum]
attr_reader :width
# @!attribute [r] ox
# @return [Fixnum]
attr_reader :ox
# @!attribute [r] oy
# @return [Fixnum]
attr_reader :oy
private
# Return a range of visible lines.
#
# @return [Vedeu::Editor::Lines]
def lines
@lines[oy...(oy + height)] || []
end
# Return a range of visible characters from each line.
#
# @return [String]
def columns(line)
line[ox...(ox + width)] || ''
end
end # Editor
end # Cropper
end # Vedeu
Version data entries
8 entries across 8 versions & 1 rubygems