Class: Rvim::ListView

Inherits:
Object
  • Object
show all
Defined in:
lib/rvim/list_view.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(lines) ⇒ ListView

Returns a new instance of ListView.



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# File 'lib/rvim/list_view.rb', line 7

def initialize(lines)
  @lines = lines
  @cursor = 0
end

Instance Attribute Details

#cursor ⇒ Object (readonly)

Returns the value of attribute cursor.



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# File 'lib/rvim/list_view.rb', line 5

def cursor
  @cursor
end

#lines ⇒ Object (readonly)

Returns the value of attribute lines.



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# File 'lib/rvim/list_view.rb', line 5

def lines
  @lines
end

Instance Method Details

#advance!(rows) ⇒ Object 



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# File 'lib/rvim/list_view.rb', line 26

def advance!(rows)
  @cursor += page_size(rows)
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rvim/list_view.rb', line 30

def empty?
  @lines.empty?
end

#more?(rows) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rvim/list_view.rb', line 22

def more?(rows)
  @cursor + page_size(rows) < @lines.size
end

#page(rows) ⇒ Object 



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# File 'lib/rvim/list_view.rb', line 18

def page(rows)
  @lines[@cursor, page_size(rows)] || []
end

#page_size(rows) ⇒ Object

Visible rows for the list. Caller passes the total rows allocated; we subtract 1 for the “– More –” prompt at the bottom.



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# File 'lib/rvim/list_view.rb', line 14

def page_size(rows)
  [rows - 1, 1].max
end