Class: EPUB::CFI::Range

Inherits:
Range
  • Object
show all
Defined in:
lib/epub/cfi.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#endObject

Returns the value of attribute end


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# File 'lib/epub/cfi.rb', line 134

def end
  @end
end

#parentObject

Returns the value of attribute parent


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# File 'lib/epub/cfi.rb', line 134

def parent
  @parent
end

#startObject

Returns the value of attribute start


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# File 'lib/epub/cfi.rb', line 134

def start
  @start
end

Class Method Details

.from_parent_and_start_and_end(parent_path, start_subpath, end_subpath) ⇒ Object


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# File 'lib/epub/cfi.rb', line 139

def from_parent_and_start_and_end(parent_path, start_subpath, end_subpath)
  start_str = start_subpath.join
  end_str = end_subpath.join

  first_paths = parent_path.collect(&:dup)
  if start_subpath
    offset_of_first = start_subpath.last.offset
    offset_of_first = offset_of_first.dup if offset_of_first
    last_of_first_paths = first_paths.pop
    first_paths << last_of_first_paths
    last_of_first_paths.steps.concat start_subpath.shift.steps
    first_paths.concat start_subpath
    first_paths.last.instance_variable_set :@offset, offset_of_first
  end
  offset_of_last = end_subpath.last.offset
  offset_of_last = offset_of_last.dup if offset_of_last
  last_paths = parent_path.collect(&:dup)
  last_of_last_paths = last_paths.pop
  last_paths << last_of_last_paths
  last_of_last_paths.steps.concat end_subpath.shift.steps
  last_paths.concat end_subpath
  last_paths.last.instance_variable_set :@offset, offset_of_last

  first = CFI::Location.new(first_paths)
  last = CFI::Location.new(last_paths)

  new_range = new(first, last)

  new_range.parent = Location.new(parent_path)
  new_range.start = start_str
  new_range.end = end_str

  new_range
end

Instance Method Details

#to_fragmentObject


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# File 'lib/epub/cfi.rb', line 179

def to_fragment
  @fragment_cache ||= "epubcfi(#{@parent},#{@start},#{@end})".freeze
end

#to_sObject


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# File 'lib/epub/cfi.rb', line 175

def to_s
  @string_cache ||= (first.to_fragment + (exclude_end? ? '...' : '..') + last.to_fragment).freeze
end