Class: QDA::GUI::CompositeText::TextTable

Inherits:
Hash
  • Object
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Defined in:
lib/weft/wxgui/controls/textcontrols.rb

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ TextTable

Returns a new instance of TextTable.



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# File 'lib/weft/wxgui/controls/textcontrols.rb', line 310

def initialize(*args)
  @reverse_table = {}
  super(*args)
end

Instance Method Details

#[](key) ⇒ Object

returns the object associated with the character point #key within the text table. Note that



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# File 'lib/weft/wxgui/controls/textcontrols.rb', line 317

def [] (key)
  keys.sort.each { | k | return super(k) if key < k }
  return nil
end

#[]=(key, value) ⇒ Object

returns the object associated with the character point #key within the text table. Note that



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# File 'lib/weft/wxgui/controls/textcontrols.rb', line 324

def []=(key, value)
  super(key, value)
  @reverse_table[ value.to_code() ] = key unless value.nil?
end

#fetch(key) ⇒ Object 



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# File 'lib/weft/wxgui/controls/textcontrols.rb', line 329

def fetch(key)
  offset = 0
  keys.sort.each do | k |
    if key < k
      return super(k), key - offset
    end
    offset = k
  end
  return nil
end

#range_to_vectors(start, length) ⇒ Object

given a range across the text length characters long from start, returns an Array of Vectors describing it



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# File 'lib/weft/wxgui/controls/textcontrols.rb', line 342

def range_to_vectors(start, length)
  offset = 0
  results = QDA::CodeSet[]

  # at each iteration, offset is the position that we're starting from

  # k is the offset we're going to. 

  keys.sort.each do | k |
    word = self[k]
    next unless word
    this_start  = [ k, start ].max
    this_end    = [ k + word.length, start + length ].min
    # they're not overlapping

    next if this_start >= this_end
    results.add( QDA::Code.new( word.docid,
                                word.offset - k + this_start,
                                this_end - this_start ) )
    # break if k >= start + length

    offset = k
  end
  return results
end

#translate(docid, point) ⇒ Object

Returns the notional offset of the point point within the document docid, or nil if that point is not displayed. Note that this represents position within the notional underlying contents, not the actual display in text control. If you wish to use these to refer to text displayed within the text control, call true_index_to_pos() on the return value.



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# File 'lib/weft/wxgui/controls/textcontrols.rb', line 370

def translate(docid, point)
  target = @reverse_table.keys.find do | frag |
    frag.docid == docid && frag.contains?(point)
  end
  return nil if target.nil?
  return @reverse_table[target] - target.length +
    ( point - target.offset )
end