Class: SnapDiff::Region

Inherits:
Object
  • Object
show all
Defined in:
lib/snap_diff/region.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(x, y, width, height) ⇒ Region

Returns a new instance of Region.



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# File 'lib/snap_diff/region.rb', line 7

def initialize(x, y, width, height)
  @x, @y, @width, @height = x, y, width, height
end

Instance Attribute Details

#height ⇒ Object

Returns the value of attribute height.



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# File 'lib/snap_diff/region.rb', line 5

def height
  @height
end

#width ⇒ Object

Returns the value of attribute width.



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# File 'lib/snap_diff/region.rb', line 5

def width
  @width
end

#x ⇒ Object

Returns the value of attribute x.



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# File 'lib/snap_diff/region.rb', line 5

def x
  @x
end

#y ⇒ Object

Returns the value of attribute y.



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# File 'lib/snap_diff/region.rb', line 5

def y
  @y
end

Class Method Details

.from_edge_coordinates(left, top, right, bottom) ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 11

def self.from_edge_coordinates(left, top, right, bottom)
  return nil unless left && top && right && bottom
  return nil if right < left || bottom < top

  Region.new(left, top, right - left, bottom - top)
end

Instance Method Details

#==(other) ⇒ Object

need to add this method to make it work with assert_equal



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# File 'lib/snap_diff/region.rb', line 98

def ==(other)
  case other
  when Region
    x == other.x && y == other.y && width == other.width && height == other.height
  when Array
    to_a == other
  else
    false
  end
end

#blank? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/snap_diff/region.rb', line 85

def blank?
  empty?
end

#bottom ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 30

def bottom
  y + height
end

#cover?(x, y) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/snap_diff/region.rb', line 77

def cover?(x, y)
  x.between?(left, right) && y.between?(top, bottom)
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/snap_diff/region.rb', line 81

def empty?
  width.zero? || height.zero?
end

#find_intersect_with(region) ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 53

def find_intersect_with(region)
  return nil unless intersect?(region)

  new_left = [x, region.x].max
  new_top = [y, region.y].max

  Region.new(new_left, new_top, [right, region.right].min - new_left, [bottom, region.bottom].min - new_top)
end

#find_relative_intersect(region) ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 70

def find_relative_intersect(region)
  intersect = find_intersect_with(region)
  return nil unless intersect

  intersect.move_by(-x, -y)
end

#inspect ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 93

def inspect
  "Region(x: #{x}, y: #{y}, width: #{width}, height: #{height})"
end

#intersect?(region) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/snap_diff/region.rb', line 62

def intersect?(region)
  left <= region.right && right >= region.left && top <= region.bottom && bottom >= region.top
end

#left ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 34

def left
  x
end

#move_by(right_by, down_by) ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 66

def move_by(right_by, down_by)
  Region.new(x + right_by, y + down_by, width, height)
end

#present? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/snap_diff/region.rb', line 89

def present?
  !empty?
end

#right ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 38

def right
  x + width
end

#size ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 42

def size
  return 0 if width < 0 || height < 0

  result = width * height
  result.zero? ? 1 : result
end

#to_a ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 49

def to_a
  [@x, @y, @width, @height]
end

#to_edge_coordinates ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 18

def to_edge_coordinates
  [left, top, right, bottom]
end

#to_top_left_corner_coordinates ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 22

def to_top_left_corner_coordinates
  [x, y, width, height]
end

#top ⇒ Object 



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# File 'lib/snap_diff/region.rb', line 26

def top
  y
end