Class: Yatte::Selection

Inherits:
Object
  • Object
show all
Defined in:
lib/yatte/selection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Selection

Returns a new instance of Selection.



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# File 'lib/yatte/selection.rb', line 7

def initialize
  @anchor_row = nil
  @anchor_col = nil
  @active = false
end

Instance Attribute Details

#anchor_col ⇒ Object (readonly)

Returns the value of attribute anchor_col.



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# File 'lib/yatte/selection.rb', line 5

def anchor_col
  @anchor_col
end

#anchor_row ⇒ Object (readonly)

Returns the value of attribute anchor_row.



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# File 'lib/yatte/selection.rb', line 5

def anchor_row
  @anchor_row
end

Instance Method Details

#active? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/yatte/selection.rb', line 19

def active?
  @active
end

#clear ⇒ Object 



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# File 'lib/yatte/selection.rb', line 23

def clear
  @anchor_row = nil
  @anchor_col = nil
  @active = false
end

#contains?(row, col, cursor_row, cursor_col) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/yatte/selection.rb', line 40

def contains?(row, col, cursor_row, cursor_col)
  r = range(cursor_row, cursor_col)
  return false unless r

  start_row, start_col, end_row, end_col = r

  return false if row < start_row || row > end_row

  if start_row == end_row
    col >= start_col && col < end_col
  elsif row == start_row
    col >= start_col
  elsif row == end_row
    col < end_col
  else
    true
  end
end

#range(cursor_row, cursor_col) ⇒ Object 



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# File 'lib/yatte/selection.rb', line 29

def range(cursor_row, cursor_col)
  return nil unless @active

  if @anchor_row < cursor_row ||
      (@anchor_row == cursor_row && @anchor_col <= cursor_col)
    [@anchor_row, @anchor_col, cursor_row, cursor_col]
  else
    [cursor_row, cursor_col, @anchor_row, @anchor_col]
  end
end

#start(row, col) ⇒ Object 



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# File 'lib/yatte/selection.rb', line 13

def start(row, col)
  @anchor_row = row
  @anchor_col = col
  @active = true
end