Class: Redcar::NavigationHistory

Inherits:

Array

• Object
• Array
• Redcar::NavigationHistory

show all

Defined in:

plugins/application/lib/application/navigation_history.rb

Overview

Instance Method Summary (collapse)

• - (Object) backward
• - (Boolean) can_backward?
• - (Boolean) can_forward?
• - (Object) forward
• - (NavigationHistory) initialize constructor

  A new instance of NavigationHistory.

• - (Object) save(doc)

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# File 'plugins/application/lib/application/navigation_history.rb', line 5

def initialize
  @max_history_size = 100
  @current = 0
end

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# File 'plugins/application/lib/application/navigation_history.rb', line 25

def backward
  move_current_and_restore(-1) if can_backward?
end

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# File 'plugins/application/lib/application/navigation_history.rb', line 21

def can_backward?
  return @current > 0
end

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# File 'plugins/application/lib/application/navigation_history.rb', line 29

def can_forward?
  return @current < self.size - 1
end

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# File 'plugins/application/lib/application/navigation_history.rb', line 33

def forward
  move_current_and_restore(1) if can_forward?
end

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# File 'plugins/application/lib/application/navigation_history.rb', line 10

def save(doc)
  return if last && last[:path] == doc.path && last[:cursor_offset] == doc.cursor_offset
  
  # Invoking this method means new future is about to be created, so remove old one.
  self.slice!(@current...self.size)
  
  ensure_size_less_than_max
  self << {:path => doc.path, :cursor_offset => doc.cursor_offset}
  @current += 1
end