Class: ApexCharts::Renderer

Inherits:
Object
  • Object
show all
Defined in:
lib/apex_charts/renderer.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/apex_charts/renderer.rb', line 16

def initialize(options)
  @options = options
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/apex_charts/renderer.rb', line 14

def options
  @options
end

Class Method Details

.render(options) ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 9

def render(options)
  new(options).render
end

Instance Method Details

#attributes ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 71

def attributes
  @attributes ||= options.delete(:div) { {} }
end

#css_class ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 87

def css_class
  attributes.delete(:class)
end

#defer(js) ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 35

def defer(js)
  if defer?
    <<~DEFERRED
      (function() {
        var createChart = function() {
          #{indent(js)}
        };
        if (window.addEventListener) {
          window.addEventListener("load", createChart, true);
        } else if (window.attachEvent) {
          window.attachEvent("onload", createChart);
        } else {
          createChart();
        }
      })();
    DEFERRED
  else
    js
  end
end

#defer? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/apex_charts/renderer.rb', line 63

def defer?
  @defer ||= options.delete(:defer)
end

#element_id ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 75

def element_id
  @element_id ||= attributes.delete(:id)
end

#height ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 91

def height
  "#{options[:chart][:height].to_i}px"
end

#id_number ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 79

def id_number
  @id_number ||= element_id&.[](/\d+/)
end

#indent(content, times = 2) ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 112

def indent(content, times=2)
  content.lines.map.with_index do |line, index|
    (index.zero? ? '' : '  ' * times) + line
  end.join
end

#module? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/apex_charts/renderer.rb', line 67

def module?
  @module ||= options.delete(:module)
end

#render ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 20

def render
  html = ''
  html = window_apex if id_number == '1' && !ApexCharts.config.default_options.empty?

  chart_rendering = <<~JS
    var #{variable} = new ApexCharts(document.querySelector("##{element_id}"), #{substitute_function_object(options.to_json)});
    #{variable}.render();
  JS

  html += <<~HTML
    <div id="#{element_id}" class="#{css_class}" style="#{style}"></div>
    #{script(defer(chart_rendering))}
  HTML
end

#script(js) ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 103

def script(js)
  type = module? ? 'module' : 'text/javascript'
  <<~SCRIPT
    <script type="#{type}" apexcharts-rb="#{RELEASE}" >
    #{js}
    </script>
  SCRIPT
end

#style ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 95

def style
  "height: #{height}; #{attributes.delete(:style)}"
end

#substitute_function_object(json) ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 56

def substitute_function_object(json)
  json.gsub(/{"function":{"args":"(?<args>.*?)","body":"(?<body>.*?)"}}/) do
    body = "\"#{$LAST_MATCH_INFO&.[](:body)}\"".undump
    "function(#{$LAST_MATCH_INFO&.[](:args)}){#{body}}"
  end
end

#variable ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 83

def variable
  @variable ||= attributes.delete(:var) { "chart#{id_number}" }
end

#window_apex ⇒ Object 



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# File 'lib/apex_charts/renderer.rb', line 99

def window_apex
  script("window.Apex = #{ApexCharts.config.default_options.to_json}")
end