Class: HexaPDF::Layout::WidthFromPolygon

Inherits:
Object
  • Object
show all
Includes:
Utils
Defined in:
lib/hexapdf/layout/width_from_polygon.rb

Overview

Utility class for generating width specifications for TextLayouter#fit from polygons.

Constant Summary

Constants included from Utils

Utils::EPSILON

Instance Method Summary collapse

Constructor Details

#initialize(polygon, offset = 0) ⇒ WidthFromPolygon

Creates a new object for the given polygon (or polygon set) and immediately prepares it so that #call can be used.

The offset argument specifies the vertical offset from the top at which calculations should start.



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# File 'lib/hexapdf/layout/width_from_polygon.rb', line 52

def initialize(polygon, offset = 0)
  @polygon = polygon
  prepare(offset)
end

Instance Method Details

#call(height, line_height) ⇒ Object

Returns the width specification for the given values with respect to the wrapped polygon.



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# File 'lib/hexapdf/layout/width_from_polygon.rb', line 58

def call(height, line_height)
  width(@max_y - height - line_height, @max_y - height)
end