Class: Zpl::Transformer::GenericScaler

Inherits:
BaseScaler show all
Defined in:
lib/zpl-transformer/transformer/generic_scaler.rb

Overview

TODO: doc It works by parsing ZPL commands, then edit the parameters of specific commands to scale the coordinates to the new dpi

Constant Summary collapse

COMMANDS_PARAM_INDEXES_TO_SCALE =

TODO: doc - what is this hash for? format? TODO: rewrite?

{
  # ^MN - Media Tracking
  #
  # Param 0: media being used
  # Param 1: black mark offset in dots (optional)
  "MN" => [1],

  # ^BY - Bar Code Field Default
  #
  # Param 0: module width in dots
  # Param 1: wide bar to narrow bar width ratio (float)
  # Param 2: bar code height in dots
  "BY" => [0, 2],

  # ^FO - Field Origin
  #
  # Param 0: x-axis location in dots
  # Param 1: y-axis location in dots
  # Param 2: justification (enum)
  "FO" => [0, 1],

  # ^B2 - Interleaved 2 of 5 Bar Code
  #
  # Param 0: orientation (enum)
  # Param 1: bar code height in dots
  # Param 2: print interpretation line above code (bool)
  "B2" => [1],

  # ^GB - Graphic Box
  #
  # Param 0: box width in dots
  # Param 1: box height in dots
  # Param 2: border thickness
  # Param 3: line color (enum)
  # Param 4: degree of corner rounding (enum)
  "GB" => [0, 1, 2],

  # ^BC - Code 128 Bar Code (Subsets A, B, and C)
  #
  # Param 0: orientation (enum)
  # Param 1: bar code height in dots
  # Param 2: print interpretation line (bool)
  # Param 3: print interpretation line above code (bool)
  # Param 4: UCC check digit (bool)
  # Param 5: mode (enum)
  "BC" => [1],

  # ^PW - Print Width
  #
  # Param 0: label width in dots
  "PW" => [0],

  # ^FT - Field Typeset
  # This command sets relative position to LabelHome (which can be set by ^LH)
  #
  # Param 0: x-axis location in dots
  # Param 1: y-axis location in dots
  # Param 3: justification (enum)
  "FT" => [0, 1],
}

Instance Method Summary collapse

Methods inherited from BaseScaler

#initialize

Methods inherited from Base

#apply

Constructor Details

This class inherits a constructor from Zpl::Transformer::BaseScaler

Instance Method Details

#map_cmd(cmd) ⇒ Object 



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# File 'lib/zpl-transformer/transformer/generic_scaler.rb', line 72

def map_cmd(cmd)
  return cmd unless cmd_need_scale? cmd

  cmd_params = cmd.params

  param_indexes_to_scale = COMMANDS_PARAM_INDEXES_TO_SCALE[cmd.name]
  param_indexes_to_scale.each do |param_index|
    if param_i = param_to_i?(cmd_params[param_index])
      cmd_params[param_index] = scale_single_number(param_i)
    end
  end

  cmd
end