Class: DocRipper::Formats::SketchRipper

Inherits:
Ripper::Base show all
Defined in:
lib/doc_ripper/formats/sketch_ripper.rb

Defined Under Namespace

Classes: Sqlite3NotFound

Instance Attribute Summary

Attributes inherited from Ripper::Base

#file_path

Instance Method Summary collapse

Methods inherited from Ripper::Base

#text

Constructor Details

#initialize(file_path) ⇒ SketchRipper

Returns a new instance of SketchRipper.

Raises:



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# File 'lib/doc_ripper/formats/sketch_ripper.rb', line 49

def initialize(file_path)
  raise Sqlite3NotFound if !defined?(SQLite3)
  super
end

Instance Method Details

#blacklist ⇒ Object 



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# File 'lib/doc_ripper/formats/sketch_ripper.rb', line 60

def blacklist
  %w(\$null MSAttributedStringFontAttribute NSColor NSParagraphStyle)
end

#rip ⇒ Object 



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# File 'lib/doc_ripper/formats/sketch_ripper.rb', line 54

def rip
  db = SQLite3::Database.new(file_path)
  data = db.execute("SELECT value FROM payload").flatten.first
  @text ||= text_objects(data).join(" ").strip
end

#text_objects(data) ⇒ Object 



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# File 'lib/doc_ripper/formats/sketch_ripper.rb', line 64

def text_objects(data)
  objects = CFPropertyList::List.new(data: data).value.value['$objects'].value

  evaluator = Proc.new do |object, previous_object, n_2_previous_object, next_object|
    coordinatesRegex = /\{\{\d*, \d*}, \{\d*, \d*\}\}|\{[\d.e-]*, [\d.]*\}/

    object.is_a?(CFPropertyList::CFString) &&
      #ignore other blacklisted properties
      blacklist.select { |bl| object.value.match(/#{bl}/) }.empty? &&
      #ignore uuids
      !object.value.match(/\w{8}-\w{4}-\w{4}-\w{4}-\w{12}/) &&
      #ignore coordinates
      !object.value.match(coordinatesRegex) &&
      #ignore font definitions
      previous_object.value != "NSFontNameAttribute" &&
      # labels always have an dictionary defined afterwards
      next_object.is_a?(CFPropertyList::CFDictionary) &&
      # Check if the string is defining the name of an artboard or font
      !(previous_object.respond_to?(:blacklisted_class?) && previous_object.blacklisted_class?) &&
      !(n_2_previous_object.respond_to?(:blacklisted_class?) && n_2_previous_object.blacklisted_class?)
    end

  objects.select.with_index do |object,i|
    next_object = objects[i+1]
    previous_object = objects[i-1]
    n_2_previous_object = objects[i-2]

    evaluator.call(object, previous_object, n_2_previous_object, next_object)
  end
end