Contents

# frozen_string_literal: true

class Shoes
  class Point
    include Common::Inspect

    def initialize(x, y)
      @x = x
      @y = y
      @dimensions = 2
    end

    attr_accessor :x, :y

    # @param [Shoes::Point] other the other point
    # @return [Integer] if this is further left, this.x; otherwise other.x
    def left(other = self)
      [x, other.x].min
    end

    # @param [Shoes::Point] other the other point
    # @return [Integer] if this is higher, this.y; otherwise other.y
    def top(other = self)
      [y, other.y].min
    end

    # Creates a new point at an offset of (x,y) from this point. Positive
    # offsets move right and down; negative offsets move left and up.
    #
    # @param [Integer] x the x-component of the offset
    # @param [Integer] y the y-component of the offset
    # @return [Shoes::Point] a new point at offset (x,y) from this point
    def to(x, y)
      Shoes::Point.new(@x + x, @y + y)
    end

    def +(other)
      other = other.to_a
      assert_dimensions_match(other.length)
      Shoes::Point.new(x + other[0], y + other[1])
    end

    def -(other)
      other = other.to_a
      assert_dimensions_match(other.length)
      Shoes::Point.new(x - other[0], y - other[1])
    end

    def width(other = self)
      (@x - other.x).abs
    end

    def height(other = self)
      (@y - other.y).abs
    end

    def ==(other)
      other.respond_to?(:x, :y) && [x, y] == [other.x, other.y]
    end

    def to_s
      nothing = '_'
      "(#{@x || nothing},#{@y || nothing})"
    end

    def to_a
      [x, y]
    end

    private

    def inspect_details
      " #{self}"
    end

    def assert_dimensions_match(other_dimension)
      raise ArgumentError, "Dimensions mismatch: expected #{@dimensions}D point, given #{other_dimension}D point" if @dimensions != other_dimension
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
shoes-core-4.0.0.rc1	lib/shoes/point.rb