Class: Ea::Diagram::StyleResolver

Inherits:
Object
  • Object
show all
Defined in:
lib/ea/diagram/style_resolver.rb

Overview

Resolves styles for diagram elements by merging multiple sources

Priority order (highest to lowest):

  1. EA Data from DiagramObject.style (BCol, LCol, etc.)
  2. User Configuration (YAML)
  3. Built-in Defaults

This ensures that:

  • EA's original styling is preserved when present
  • Users can override defaults via configuration
  • Sensible defaults are always available

Constant Summary collapse

CONNECTOR_TYPE_MAP =

Maps UML connector classes to their style type names. New connector types are added here — no method changes needed.

{
  Lutaml::Uml::Generalization => "generalization",
  Lutaml::Uml::Association => "association",
  Lutaml::Uml::Dependency => "dependency",
  Lutaml::Uml::Realization => "realization",
}.freeze
ASSOCIATION_SUBTYPE_MAP =

Association sub-type precedence for style resolution

{
  "aggregation" => "aggregation",
  "composition" => "composition",
}.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config_path = nil) ⇒ StyleResolver

Initialize with configuration

Parameters:

  • config_path (String, nil) (defaults to: nil) —

    Path to configuration file



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# File 'lib/ea/diagram/style_resolver.rb', line 22

def initialize(config_path = nil)
  @configuration = Configuration.new(config_path)
  @style_parser = StyleParser.new
end

Instance Attribute Details

#configuration ⇒ Object (readonly)

Returns the value of attribute configuration.



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# File 'lib/ea/diagram/style_resolver.rb', line 17

def configuration
  @configuration
end

#style_parser ⇒ Object (readonly)

Returns the value of attribute style_parser.



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# File 'lib/ea/diagram/style_resolver.rb', line 17

def style_parser
  @style_parser
end

Instance Method Details

#determine_association_type(connector) ⇒ String

Determine specific association type

Parameters:

  • connector (Object) —

    Association connector

Returns:

  • (String) —

    Specific association type



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# File 'lib/ea/diagram/style_resolver.rb', line 264

def determine_association_type(connector)
  return "association" unless connector.is_a?(Lutaml::Uml::Association)

  [connector.owner_end_type, connector.member_end_type].each do |type|
    resolved = ASSOCIATION_SUBTYPE_MAP[type&.downcase]
    return resolved if resolved
  end

  "association"
end

#determine_connector_type(connector) ⇒ String

Determine connector type from connector object

Parameters:

  • connector (Object) —

    UML connector

Returns:

  • (String) —

    Connector type name



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# File 'lib/ea/diagram/style_resolver.rb', line 251

def determine_connector_type(connector)
  return "association" unless connector

  type_name = CONNECTOR_TYPE_MAP[connector.class]
  return type_name if type_name && type_name != "association"
  return determine_association_type(connector) if type_name == "association"

  "association"
end

#parse_diagram_link_style(style_string) ⇒ Hash

Parse DiagramLink.style string

Parameters:

  • style_string (String) —

    EA style string

Returns:

  • (Hash) —

    Parsed style



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# File 'lib/ea/diagram/style_resolver.rb', line 201

def parse_diagram_link_style(style_string) # rubocop:disable Metrics/AbcSize,Metrics/CyclomaticComplexity,Metrics/MethodLength
  return {} unless style_string

  style = {}
  pairs = style_string.split(";")

  pairs.each do |pair|
    key, value = pair.split("=", 2)
    next unless key && value

    case key.strip
    when "LCol"
      # Line color
      style[:stroke] =
        style_parser.color_from_ea_color(value.to_i)
    when "LWth"
      # Line width
      style[:stroke_width] = value.to_i
    when "LStyle"
      # Line style (0=solid, 1=dash, 2=dot, etc.)
      case value.to_i
      when 1
        style[:stroke_dasharray] = "5,5"
      when 2
        style[:stroke_dasharray] = "2,2"
      end
    end
  end

  style
end

#parse_diagram_object_style(style_string) ⇒ Hash

Parse DiagramObject.style string (EA format: "BCol=16764159;LCol=0;SOID=123")

Parameters:

  • style_string (String) —

    EA style string

Returns:

  • (Hash) —

    Parsed style with fill and stroke colors



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# File 'lib/ea/diagram/style_resolver.rb', line 163

def parse_diagram_object_style(style_string) # rubocop:disable Metrics/AbcSize,Metrics/CyclomaticComplexity,Metrics/MethodLength,Metrics/PerceivedComplexity
  return {} unless style_string

  style = {}
  pairs = style_string.split(";")

  pairs.each do |pair|
    key, value = pair.split("=", 2)
    next unless key && value

    case key.strip
    when "BCol"
      # Background color (BGR integer)
      style[:fill] =
        style_parser.color_from_ea_color(value.to_i)
    when "LCol"
      # Line color (BGR integer)
      style[:stroke] =
        style_parser.color_from_ea_color(value.to_i)
    when "BFol"
      # Bold font (0 or 1)
      style[:font_weight] = value == "1" ? 700 : 400
    when "IFol"
      # Italic font (0 or 1)
      style[:font_style] = value == "1" ? "italic" : "normal"
    when "LWth"
      # Line width
      style[:stroke_width] = value.to_i
    end
  end

  style
end

#resolve_connector_style(connector, diagram_link = nil) ⇒ Hash

Resolve complete style for a connector

(Association, Generalization, etc.) Diagram routing data

Parameters:

  • connector (Object) —

    UML connector

  • diagram_link (Lutaml::Uml::DiagramLink, nil) (defaults to: nil)

Returns:

  • (Hash) —

    Complete resolved style



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# File 'lib/ea/diagram/style_resolver.rb', line 78

def resolve_connector_style(connector, diagram_link = nil) # rubocop:disable Metrics/AbcSize,Metrics/MethodLength
  # Determine connector type
  connector_type = determine_connector_type(connector)

  style = {}

  # Start with configuration defaults for this connector type
  style[:arrow_type] =
    configuration.connector_style(connector_type, "arrow.type")
  style[:arrow_size] =
    configuration.connector_style(connector_type, "arrow.size")
  style[:stroke] =
    configuration.connector_style(connector_type, "line.stroke")
  style[:stroke_width] =
    configuration.connector_style(connector_type, "line.stroke_width")
  style[:stroke_dasharray] =
    configuration.connector_style(connector_type,
                                  "line.stroke_dasharray")
  style[:fill] =
    configuration.connector_style(connector_type, "line.fill") || "none"

  # Override with EA data if present (highest priority)
  if diagram_link&.style
    ea_style = parse_diagram_link_style(diagram_link.style)
    style.merge!(ea_style)
  end

  style.compact
end

#resolve_element_style(element, diagram_object = nil) ⇒ Hash

Resolve complete style for an element

Diagram placement data

Parameters:

  • element (Object) —

    UML element (Class, DataType, etc.)

  • diagram_object (Lutaml::Uml::DiagramObject, nil) (defaults to: nil)

Returns:

  • (Hash) —

    Complete resolved style



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# File 'lib/ea/diagram/style_resolver.rb', line 33

def resolve_element_style(element, diagram_object = nil) # rubocop:disable Metrics/AbcSize,Metrics/MethodLength
  style = {}

  # Start with configuration defaults
  style[:fill] = configuration.style_for(element, "colors.fill")
  style[:stroke] = configuration.style_for(element, "colors.stroke")
  style[:stroke_width] =
    configuration.style_for(element, "box.stroke_width")
  style[:stroke_linecap] =
    configuration.style_for(element, "box.stroke_linecap")
  style[:stroke_linejoin] =
    configuration.style_for(element, "box.stroke_linejoin")
  style[:corner_radius] =
    configuration.style_for(element, "box.corner_radius")
  style[:fill_opacity] =
    configuration.style_for(element, "box.fill_opacity")
  style[:stroke_opacity] =
    configuration.style_for(element, "box.stroke_opacity")

  # Font configuration
  style[:font_family] =
    configuration.style_for(element, "fonts.class_name.family")
  style[:font_size] =
    configuration.style_for(element, "fonts.class_name.size")
  style[:font_weight] =
    configuration.style_for(element, "fonts.class_name.weight")
  style[:font_style] =
    configuration.style_for(element, "fonts.class_name.style")

  # Override with EA data if present (highest priority)
  if diagram_object&.style
    ea_style = parse_diagram_object_style(diagram_object.style)
    style.merge!(ea_style)
  end

  style.compact
end

#resolve_fill_color(element, diagram_object = nil) ⇒ String

Resolve fill color specifically

Diagram placement data

Parameters:

  • element (Object) —

    UML element

  • diagram_object (Lutaml::Uml::DiagramObject, nil) (defaults to: nil)

Returns:

  • (String) —

    Resolved fill color



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# File 'lib/ea/diagram/style_resolver.rb', line 114

def resolve_fill_color(element, diagram_object = nil)
  # Priority 1: EA data from DiagramObject.style
  if diagram_object&.style
    ea_style = parse_diagram_object_style(diagram_object.style)
    return ea_style[:fill] if ea_style[:fill]
  end

  # Priority 2: Configuration (Class > Package > Stereotype > Defaults)
  configuration.style_for(element, "colors.fill")
end

#resolve_font(element, context = :class_name) ⇒ Hash

Resolve font properties

(:class_name, :attribute, :operation, :stereotype)

Parameters:

  • element (Object) —

    UML element

  • context (Symbol) (defaults to: :class_name) —

    Font context

Returns:

  • (Hash) —

    Font properties (family, size, weight, style)



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# File 'lib/ea/diagram/style_resolver.rb', line 148

def resolve_font(element, context = :class_name)
  {
    family: configuration.style_for(element, "fonts.#{context}.family"),
    size: configuration.style_for(element, "fonts.#{context}.size"),
    weight: configuration.style_for(element, "fonts.#{context}.weight"),
    style: configuration.style_for(element, "fonts.#{context}.style"),
  }.compact
end

#resolve_stroke_color(element, diagram_object = nil) ⇒ String

Resolve stroke color specifically

Diagram placement data

Parameters:

  • element (Object) —

    UML element

  • diagram_object (Lutaml::Uml::DiagramObject, nil) (defaults to: nil)

Returns:

  • (String) —

    Resolved stroke color



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# File 'lib/ea/diagram/style_resolver.rb', line 131

def resolve_stroke_color(element, diagram_object = nil)
  # Priority 1: EA data from DiagramObject.style
  if diagram_object&.style
    ea_style = parse_diagram_object_style(diagram_object.style)
    return ea_style[:stroke] if ea_style[:stroke]
  end

  # Priority 2: Configuration
  configuration.style_for(element, "colors.stroke")
end