Class: Plist4r::Table

Inherits:
Object show all
Defined in:
lib/plist4r/mixin/table.rb

Overview

A data type representation for tables. The underlying store is an array of arrays (2d). The addressing scheme is based on (column, row) order, with Range objects to specify the bounds of any rectangle of elements withing the table.

A variety of methods are provided for manipulating the table data, including flipping, inserting, replacing and deleting. Operations can be column-based, row-based, or both.

Constant Summary collapse

EmptyCell =

The value to assign to an empty cell

nil
EmptyCells =

The range of valid values for which match the empty cell criteria (for which the cell are ignored)

[nil, false]
MinPadSize =

When allocating the arrays for a new table, the minimum size to pad around with empty cells.

10
OptionsHash = 
%w[ size array pad_all fill_all ]

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args, &blk) ⇒ Table

Returns a new instance of Table.



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# File 'lib/plist4r/mixin/table.rb', line 52

def initialize *args, &blk
  @array = []

  case args[0]
  when nil
    resize 0..0, 0..0

  when Hash
    parse_opts args[0]

  when Plist4r::Table
    %w[ col_range row_range array ].each do |a|
      self.send a.to_sym, args[0].send(a.to_sym).deep_clone
    end

  else
    raise "unsupported type"
  end

  resize 0..0, 0..0 unless @cr && @rr
end

Class Method Details

.sanitize_ranges(*ranges) ⇒ Object

This class only understands a range addressing scheme, which is used to specify table locations in a [columns, rows] caresian system starting at col 0, row 0.

Convert any Integer numbers into range objects. Check that all input ranges are positive, starting (and including) zero as the first index.



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# File 'lib/plist4r/mixin/table.rb', line 19

def sanitize_ranges *ranges
  sanitized_ranges = []
  ranges.flatten.each do |range|
    case range
    when Range
      if range.exclude_end?
        range = range.first..(range.last - 1)
      end
    when Integer
      range = (range..range)
    else
      raise "Unsupported type"
    end
    if range.first < 0 || range.last < 0
      raise "range cannot cover negative values"
    end
    sanitized_ranges << range
  end
  sanitized_ranges
end

Instance Method Details

#array(array = nil) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 181

def array array=nil
  case array
  when nil
    @array
  when Array
    if array.multidim?
      @array = array
      auto_size unless @cr && @rr
    else
      raise "array type not supported"
    end
  else
    raise "Unsupported type"
  end
end

#ascii_col_width ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 87

def ascii_col_width
  lines = self.inspect.split "\n"
  lines[0].length
end

#auto_size ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 214

def auto_size      
  ce = @array.size - 1
  unless @cr && (0..ce).include_range?(@cr)
    @cr = 0..ce
  end

  re = 0
  @array.each do |col|
    re = col.size - 1 if col.size - 1 > re
  end

  unless @rr && (0..re).include_range?(@rr)
    @rr = 0..re
  end
end

#cell(col, row, value = nil) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 138

def cell col, row, value=nil
  raise "unsupported type" unless col.is_a?(Integer) && row.is_a?(Integer)
  return nil if col < 0 || row < 0

  case value
  when nil
    @array[col][row]
  else
    if value.is_a? Plist4r::Table
      @array[col][row] = value.cell col, row
    else
      @array[col][row] = value
    end
  end
end

#cells(col_range = nil, row_range = nil, value = nil) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 404

def cells col_range=nil, row_range=nil, value=nil
  col_range = @cr if col_range.nil? ; row_range = @rr if row_range.nil?
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range

  replace col_range, row_range, value if value
  self.class.new :array => @array, :size => [col_range, row_range]        
end

#col(col_range, value = nil) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 412

def col col_range, value=nil
  col_range = Plist4r::Table.sanitize_ranges col_range

  case value
  when nil
    cells col_range, @rr
  else
    col_replace col_range, value
  end
end

#col_insert(col_range, row_range, other_data, resize = true) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 390

def col_insert col_range, row_range, other_data, resize=true
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range
  translate col_range.first..@cr.last, @rr, [col_range.size, 0]
  replace col_range, row_range, other_data
  @cr = @cr.first..(@cr.last + col_range.size) if resize
end

#col_range ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 130

def col_range
  @cr
end

#col_replace(col_range, data) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 370

def col_replace col_range, data
  col_range = Plist4r::Table.sanitize_ranges col_range
  replace col_range, @rr.first..@rr.last, data
end

#crop(col_range, row_range) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 262

def crop col_range, row_range
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range

  pad col_range, row_range, EmptyCell
  crop_obj = self.class.new :size => [0..(col_range.size - 1), 0..(row_range.size - 1)]

  col_range.each do |col|
    row_range.each do |row|
      crop_obj.array[col-col_range.first][row-row_range.first] = @array[col][row].deep_clone
    end
  end
  crop_obj
end

#data_replace(col_range, row_range, other_data) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 336

def data_replace col_range, row_range, other_data
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range

  self.pad col_range, row_range, EmptyCell
  o = other_data.deep_clone

  if o.col_range.size < col_range.size
    col_range = (col_range.first)..(row_range.first + o.col_range.size - 1)
  end

  if o.row_range.size < row_range.size
    row_range = (row_range.first)..(row_range.first + o.row_range.size - 1)
  end

  col_range.each do |col|
    row_range.each do |row|
      # @array[col][row] = o.array[col-col_range.first+o.col_range.first][row-row_range.first+o.row_range.first].deep_clone
      cell col, row, o.cell(col-col_range.first+o.col_range.first,row-row_range.first+o.row_range.first).deep_clone
    end
  end
end

#each(col_range = nil, row_range = nil, &blk) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 171

def each col_range=nil, row_range=nil, &blk
  col_range = @cr if col_range.nil? ; row_range = @rr if row_range.nil?
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range
  row_range.each do |row|
    col_range.each do |col|
      yield cell(col, row)
    end
  end
end

#fill(col_range, row_range, data = nil) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 276

def fill col_range, row_range, data=nil
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range
  data = EmptyCell unless data

  pad col_range, row_range, EmptyCell
  col_range.each do |c|
    row_range.each do |r|
      @array[c][r] = data.deep_clone
    end
  end
end

#fill_all(data) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 288

def fill_all data
  fill @cr, @rr, data
end

#first(value = nil) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 154

def first value=nil
  cell @cr.first, @rr.first, value
end

#inspect(start_col = 0) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 92

def inspect start_col=0
  cell_width = Plist4r::Table.new :size => [@cr, 0..0], :fill_all => 5
  @cr.each do |col|
    @rr.each do |row|
      cell_size = @array[col][row].inspect.size
      cell_width.cell(col, 0, cell_size) if cell_size > cell_width.cell(col,0)
    end
  end

  col_pad_pre  = " "
  col_pad_post = " "

  vert_border = "|"
  horz_border = "-"

  row_sep = ""
  row_sep << " " * start_col
  @cr.each do |col|
    row_sep << vert_border + horz_border * (col_pad_pre.size + cell_width.cell(col,0) + col_pad_post.size)
  end
  row_sep << vert_border

  o = ""
  o << row_sep << "\n"
  @rr.each do |row|
    o << " " * start_col
    @cr.each do |col|
      cell_str = vert_border + col_pad_pre + " " * cell_width.cell(col,0) + col_pad_post
      cell_str[vert_border.size+col_pad_pre.size,@array[col][row].inspect.size] = @array[col][row].inspect
      o << cell_str
    end
    o << vert_border
    o << "\n"
    o << row_sep << "\n"
  end
  return o
end

#inverse_fill(col_range, row_range, data = nil) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 292

def inverse_fill col_range, row_range, data=nil
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range
  data = EmptyCell unless data

  crop_obj = crop col_range, row_range
  fill @cr, @rr, data
  replace col_range, row_range, crop_obj
end

#map(col_range = nil, row_range = nil, &blk) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 158

def map col_range=nil, row_range=nil, &blk
  col_range = @cr if col_range.nil? ; row_range = @rr if row_range.nil?
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range

  t = Plist4r::Table.new :size => [col_range, row_range]
  row_range.each do |row|
    col_range.each do |col|
      t.cell col, row, yield(cell(col, row))
    end
  end
  t
end

#pad(col_range, row_range, data) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 230

def pad col_range, row_range, data
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range

  if EmptyCells.include? data
    if col_range.end < MinPadSize - 1
      col_range = 0..(MinPadSize - 1)
    else
      col_range = 0..(col_range.end)
    end

    if row_range.end < MinPadSize - 1
      row_range = 0..(MinPadSize - 1)
    else
      row_range = 0..(row_range.end)
    end
  end

  (col_range.end - @array.size + 1).times do
    @array << []
  end

  col_range.each do |col|
    row_range.each do |row|
      @array[col][row] = data.deep_clone if EmptyCells.include? @array[col][row]
    end
  end
end

#pad_all(data) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 258

def pad_all data
  pad @cr, @rr, data
end

#parse_opts(opts) ⇒ Object

Sets up those valid (settable) attributes as found the options hash. Normally we dont call this method directly. Called from #initialize.

Parameters:

See Also:



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# File 'lib/plist4r/mixin/table.rb', line 78

def parse_opts opts
  self.class::OptionsHash.each do |opt|
    if opts[opt.to_sym]
      value = opts[opt.to_sym]
      eval "self.#{opt}(value)"
    end
  end
end

#replace(col_range, row_range, data) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 358

def replace col_range, row_range, data
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range

  case data
  when Plist4r::Table
    data_replace col_range, row_range, data
  else
    fill col_range, row_range, data
  end
  self
end

#resize(col_range, row_range) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 206

def resize col_range, row_range
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range

  @cr = col_range
  @rr = row_range
  pad @cr, @rr, EmptyCell
end

#row(row_range, value = nil) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 423

def row row_range, value=nil
  row_range = Plist4r::Table.sanitize_ranges row_range

  case value
  when nil
    cells @cr, row_range
  else
    row_replace row_range, value
  end
end

#row_insert(col_range, row_range, other_data, resize = true) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 397

def row_insert col_range, row_range, other_data, resize=true
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range
  translate @cr, row_range.first..@rr.last, [0, row_range.size]
  replace col_range, row_range, other_data
  @rr = @rr.first..(@rr.last + row_range.size) if resize
end

#row_range ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 134

def row_range
  @rr
end

#row_replace(row_range, data) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 375

def row_replace row_range, data
  row_range = Plist4r::Table.sanitize_ranges row_range
  replace @cr.first..@cr.last, row_range, data
end

#size(*args) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 197

def size *args
  if args.empty?
    [@cr, @rr]
  else
    col_range, row_range = args.flatten
    resize col_range, row_range
  end
end

#translate(col_range, row_range, vector) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 380

def translate col_range, row_range, vector
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range

  crop_obj = crop col_range, row_range
  fill col_range, row_range, EmptyCell
  col_range = (col_range.begin+vector[0])..(col_range.end+vector[0])
  row_range = (row_range.begin+vector[1])..(row_range.end+vector[1])
  replace col_range, row_range, crop_obj
end

#transpose(col_range = nil, row_range = nil, keep_bounds = false) ⇒ Object 



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# File 'lib/plist4r/mixin/table.rb', line 301

def transpose col_range=nil, row_range=nil, keep_bounds=false
  col_range = @cr if col_range.nil? ; row_range = @rr if row_range.nil?
  col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range

  if col_range == @cr && row_range == @rr && @cr.first == @rr.first
    @array = @array.transpose
    if keep_bounds
      @cr,@rr = [[@cr,@rr].min,[@cr,@rr].min]
    else
      @cr,@rr = [@rr, @cr]
    end
    self
  else
    col_range, row_range = Plist4r::Table.sanitize_ranges col_range, row_range

    crop_obj = crop col_range, row_range
    crop_obj.transpose
    fill col_range, row_range, EmptyCell

    ocr,orr = [col_range,row_range]
    col_range = (ocr.begin)..(ocr.begin+orr.size-1)
    row_range = (orr.begin)..(orr.begin+ocr.size-1)

    if keep_bounds && col_range.size != row_range.size
      if ocr.size > orr.size
        row_range = (row_range.begin)..(orr.end)
      else
        col_range = (col_range.begin)..(ocr.end)
      end
    end
    replace col_range, row_range, crop_obj
  end
  self
end