Class: Vedeu::Editor::Cropper

Inherits:
Object
  • Object
show all
Defined in:
lib/vedeu/editor/cropper.rb

Overview

Crop the lines to the visible area of the document, as defined by the geometry provided.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(lines:, height:, width:, ox:, oy:) ⇒ Vedeu::Editor::Cropper

Returns a new instance of Vedeu::Editor::Cropper.

Parameters:



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# File 'lib/vedeu/editor/cropper.rb', line 18

def initialize(lines:, height:, width:, ox:, oy:)
  @lines  = lines
  @height = height
  @width  = width
  @ox     = ox
  @oy     = oy
end

Instance Attribute Details

#height ⇒ Fixnum (readonly, protected)

Returns:

  • (Fixnum) 


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# File 'lib/vedeu/editor/cropper.rb', line 40

def height
  @height
end

#ox ⇒ Fixnum (readonly, protected)

Returns:

  • (Fixnum) 


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# File 'lib/vedeu/editor/cropper.rb', line 48

def ox
  @ox
end

#oy ⇒ Fixnum (readonly, protected)

Returns:

  • (Fixnum) 


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# File 'lib/vedeu/editor/cropper.rb', line 52

def oy
  @oy
end

#width ⇒ Fixnum (readonly, protected)

Returns:

  • (Fixnum) 


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# File 'lib/vedeu/editor/cropper.rb', line 44

def width
  @width
end

Instance Method Details

#columns(line) ⇒ String (private)

Return a range of visible characters from each line.

Returns:

  • (String) 


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# File 'lib/vedeu/editor/cropper.rb', line 66

def columns(line)
  line[ox...(ox + width)] || ''
end

#cropped ⇒ Array<void>

Note:

If there are no lines of content, we return an empty

Returns the lines cropped.

array. If there are any empty lines, then they are discarded.

Returns:

  • (Array<void>) 


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# File 'lib/vedeu/editor/cropper.rb', line 32

def cropped
  lines.map { |line| columns(line) }
end

#lines ⇒ Vedeu::Editor::Lines (private)

Return a range of visible lines.

Returns:



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# File 'lib/vedeu/editor/cropper.rb', line 59

def lines
  @lines[oy...(oy + height)] || []
end