Class: JapaneseBookkeepingSVG::SVGGenerator

Inherits:
Object
  • Object
show all
Defined in:
lib/japanese_bookkeeping_svg/svg_generator.rb

Overview

rubocop:disable Metrics/ClassLength

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(&block) ⇒ SVGGenerator

Returns a new instance of SVGGenerator.



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# File 'lib/japanese_bookkeeping_svg/svg_generator.rb', line 3

def initialize(&block)
  @output = []
  @max_width = 0
  @max_height = 0

  return unless block
  instance_exec(&block)
  close
end

Class Method Details

.convert_unit(length) ⇒ Object

rubocop:disable Metrics/AbcSize,Metrics/CyclomaticComplexity,Metrics/MethodLength

Raises:

  • (ArgumentError) 


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# File 'lib/japanese_bookkeeping_svg/svg_generator.rb', line 75

def self.convert_unit(length) # rubocop:disable Metrics/AbcSize,Metrics/CyclomaticComplexity,Metrics/MethodLength
  return nil if length.nil?
  m = /\A(\d+)(em|ex|px|in|cm|mm|pt|pc)?\z/.match(length.to_s)
  raise ArgumentError, "Unknown length #{length}" unless m
  v = m[1].to_i
  return v if m[2].nil?
  case m[2].intern
  when :em, :ex
    v * 16
  when :px
    v
  when :in
    v * 96
  when :cm
    (v * 96) / 2.54
  when :mm
    (v * 96) / 25.4
  when :pt
    (v * 4).fdiv(3)
  when :pc
    v * 16
  end
end

Instance Method Details

#close(width = @max_width, height = @max_height) ⇒ Object 



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# File 'lib/japanese_bookkeeping_svg/svg_generator.rb', line 13

def close(width = @max_width, height = @max_height)
  unshift_header(width, height)
  push_footer
end

#line(x1, y1, x2, y2, style = {}) ⇒ Object 



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# File 'lib/japanese_bookkeeping_svg/svg_generator.rb', line 22

def line(x1, y1, x2, y2, style = {})
  s = style.clone
  attrs = ['stroke', 'stroke-width'].map do |attr|
    if s.key?(attr)
      %( #{attr}="#{s.delete attr}")
    else
      ''
    end
  end.join('')
  @output << %(<line x1="#{x1}" y1="#{y1}" x2="#{x2}" y2="#{y2}"#{attrs}#{style_attr(s)} />)
  update_max_width_and_height(x2, y2)
end

#text(x, y, text, style = {}) ⇒ Object

rubocop:disable Metrics/MethodLength,Metrics/AbcSize,Metrics/CyclomaticComplexity



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# File 'lib/japanese_bookkeeping_svg/svg_generator.rb', line 35

def text(x, y, text, style = {}) # rubocop:disable Metrics/MethodLength,Metrics/AbcSize,Metrics/CyclomaticComplexity
  s = style.clone
  attrs = {}
  attrs_str = ['font-family', 'font-size', 'text-anchor', 'textLength', 'lengthAdjust', 'xml:space'].map do |attr|
    if s.key?(attr)
      attrs[attr] = s[attr]
      %( #{attr}="#{s.delete attr}")
    else
      ''
    end
  end.join('')

  text_lines = []
  text_lines << %(<text x="#{x}" y="#{y}"#{attrs_str}#{style_attr(s)}>)
  max_width_em = 0
  height_em = 0
  dy = 0
  text.each_line do |line|
    line.chomp!
    text_lines << %(<tspan x="#{x}" dy="#{dy}em">#{line}</tspan>)
    dy = 1
    max_width_em = line.size if line.size > max_width_em
    height_em += 1
  end
  text_lines << '</text>'
  @output << text_lines.join('')

  max_width = self.class.convert_unit(attrs['textLength'] || "#{max_width_em}em")
  case attrs['text-anchor']
  when nil, 'start'
    max_x = x + max_width
  when 'middle'
    max_x = x + max_width / 2
  when 'end'
    max_x = x
  end
  max_y = y + self.class.convert_unit("#{height_em}em")
  update_max_width_and_height(max_x, max_y)
end

#to_s ⇒ Object 



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# File 'lib/japanese_bookkeeping_svg/svg_generator.rb', line 18

def to_s
  @output.join("\n")
end