AndyObtiva/glimmer-dsl-libui

# Copyright (c) 2021-2024 Andy Maleh
#
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require 'glimmer'
require 'glimmer/dsl/expression'
require 'glimmer/dsl/parent_expression'
require 'glimmer/dsl/top_level_expression'
require 'glimmer/libui/custom_shape'

module Glimmer
  module DSL
    module Libui
      class CustomShapeExpression < Expression
        # TODO Consider making custom shapes automatically generate static expressions
        include ParentExpression
        include TopLevelExpression

        def can_interpret?(parent, keyword, *args, &block)
          LibUI::CustomShape.for(keyword)
        end
  
        def interpret(parent, keyword, *args, &block)
          options = args.last.is_a?(Hash) ? args.pop : {}
          LibUI::CustomShape.for(keyword).new(keyword, parent, args, options, &block)
        end
  
        def add_content(custom_shape, keyword, *args, &block)
          options = args.last.is_a?(Hash) ? args.last : {}
          options[:post_add_content] = true if !options.include?(:post_add_content)
          # TODO consider avoiding source_location
          if block.source_location == custom_shape.content&.__getobj__&.source_location
            custom_shape.content.call(custom_shape) unless custom_shape.content.called?
          else
            super
          end
          custom_shape.post_add_content if options[:post_add_content]
        end
      end
    end
  end
end