Class: StackedPdfGenerator::CropMarkDetector::LineCollector

Inherits:
HexaPDF::Content::Processor
  • Object
show all
Defined in:
lib/stacked_pdf_generator/crop_mark_detector.rb

Overview

Walks the page content stream and records every line/rectangle edge in page coordinates (CTM applied).

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ LineCollector

Returns a new instance of LineCollector.



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# File 'lib/stacked_pdf_generator/crop_mark_detector.rb', line 117

def initialize
  super
  @lines = []
  @current = nil
end

Instance Attribute Details

#lines ⇒ Object (readonly)

Returns the value of attribute lines.



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# File 'lib/stacked_pdf_generator/crop_mark_detector.rb', line 115

def lines
  @lines
end

Instance Method Details

#append_rectangle(x, y, w, h) ⇒ Object 



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# File 'lib/stacked_pdf_generator/crop_mark_detector.rb', line 136

def append_rectangle(x, y, w, h)
  edges = [
    [x, y, x + w, y],
    [x + w, y, x + w, y + h],
    [x + w, y + h, x, y + h],
    [x, y + h, x, y]
  ]
  edges.each do |x0, y0, x1, y1|
    tx0, ty0 = transform_point(x0, y0)
    tx1, ty1 = transform_point(x1, y1)
    @lines << [tx0, ty0, tx1, ty1]
  end
end

#line_to(x, y) ⇒ Object 



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# File 'lib/stacked_pdf_generator/crop_mark_detector.rb', line 127

def line_to(x, y)
  if @current
    tx0, ty0 = transform_point(*@current)
    tx1, ty1 = transform_point(x, y)
    @lines << [tx0, ty0, tx1, ty1]
  end
  @current = [x, y]
end

#move_to(x, y) ⇒ Object 



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# File 'lib/stacked_pdf_generator/crop_mark_detector.rb', line 123

def move_to(x, y)
  @current = [x, y]
end