Class: Comet::Generator

Inherits:
Object
  • Object
show all
Defined in:
lib/comet-html/generator.rb

Instance Method Summary collapse

Constructor Details

#initialize(output, input, file) ⇒ Generator

Returns a new instance of Generator.



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# File 'lib/comet-html/generator.rb', line 41

def initialize output, input, file
  @output   = output
  @input    = input
  @filepath = file
end

Instance Method Details

#append_classes_predeclaration ⇒ Object 



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# File 'lib/comet-html/generator.rb', line 63

def append_classes_predeclaration
  result = ""
  Context.classes.each do |object|
    next if object.should_skip?
    result += "  class #{object.typename};\n"
  end
  result
end

#compiled_header_path ⇒ Object 



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# File 'lib/comet-html/generator.rb', line 55

def compiled_header_path
  @output + relative_filepath.delete_suffix(File.extname relative_filepath) + ".hpp"
end

#compiled_source_path ⇒ Object 



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# File 'lib/comet-html/generator.rb', line 59

def compiled_source_path
  @output + relative_filepath.delete_suffix(File.extname relative_filepath) + ".cpp"
end

#generate ⇒ Object 



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# File 'lib/comet-html/generator.rb', line 129

def generate
  src = File.read @filepath
  src.gsub! /<template/i,  "<html"
  src.gsub! /<\/template/i, "</html>"

  document = Nokogiri::HTML.parse(src) do |config| config.strict end
  
  html = document.xpath("html").first
  head = document.xpath("//head")
  body = document.xpath("//body")
  raise LoadError.new "could not load html template `#{@filepath}`" if html.nil?
  raise LoadError.new "missing body element in `#{@filepath}`" if body.first.nil?

  Context.reset
  Context.filename = @filepath
  if !@config.nil? && !@config["elements"].nil?
    Context.load_global_element_types @config["elements"]
  end
  
  load_includes head
  
  fatal_error = nil
  document.errors.each do |error|
    if is_error_fatal? error
      puts "[comet-html] #{@filepath}:#{error.line}:#{error.column}: #{error.message}"
      fatal_error ||= error
      error_count += 1
    end
  end
  raise HtmlParseError.new fatal_error unless fatal_error.nil?

  main_element = Comet::Class.new body
  main_element.typename = if html["classname"].nil?
    File.basename(@filepath, ".html").to_s.camelize
  else
    html["classname"]
  end
  main_element.superclass = html["extends"] unless html["extends"].nil?
  main_element.probe

  main_element.inline_code = ""
  head.css("script").each do |script|
    main_element.inline_code += script.text.strip + "\n"
  end

  head.css("attribute").each do |attribute|
    main_element.refs << (CppReference.new attribute, attribute["type"], attribute["name"], attribute["value"])
  end

  define_name = "__COMET_CUSTOM_ELEMENT_#{main_element.typename.upcase}__"
  header_code = ""
  source_code = ""
  Context.classes.reverse.each do |object|
    next if object.should_skip?
    header_code += HeaderGenerator.new(object).generate + "\n"
    source_code += SourceGenerator.new(object).generate + "\n"
  end

  includes_str = prepare_includes head
  
  header = <<HEADER
#ifndef  #{define_name}
# define #{define_name}

# include <comet/bindable.hpp>
# include <comet/repeater.hpp>
# include <comet/slot_element.hpp>
# include <comet/comment_element.hpp>
# include <comet/custom_element.hpp>
# include <comet/signal.hpp>
#{includes_str}

namespace HtmlTemplate
{
#{append_classes_predeclaration}
#{header_code}
}

#endif
HEADER

  source = <<SOURCE
#include <comet/lexical_cast.hpp>
#include "#{compiled_header_path}"

#{source_code}
SOURCE

  { header: header, source: source }
end

#html5_tags ⇒ Object 



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# File 'lib/comet-html/generator.rb', line 105

def html5_tags
  ["article", "aside", "details", "figcaption", "figure", "footer", "header", "main", "mark", "nav", "section", "summary", "time"]
end

#internal_tags ⇒ Object 



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# File 'lib/comet-html/generator.rb', line 113

def internal_tags
  ["include", "attribute", "slot"]
end

#is_error_fatal?(error) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/comet-html/generator.rb', line 117

def is_error_fatal? error
  matches = error.message.match(/^[0-9]+:[0-9]+: ERROR: Tag (.+) invalid$/)
  unless matches.nil?
    tagName = matches[1]
    return false if (internal_tags + html5_tags + whitelisted_tags).include? tagName
    return (if Context.element_types[tagName].nil? then true else false end)
  end
  return false if error.message.end_with?("ERROR: htmlParseEntityRef: no name") ||
                  error.message.end_with?("ERROR: Expected a doctype token$")
  true
end

#load_includes(head) ⇒ Object 



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# File 'lib/comet-html/generator.rb', line 72

def load_includes head
  head.css("include").each do |include_attribute|
    unless include_attribute["require"].nil?
      type = include_attribute["require"].to_s
      tag  = if include_attribute["tag-name"].nil?
        parts = type.split("<")
        parts[0].gsub! "::", "_"
        parts.join("<").dasherize
      else
        include_attribute["tag-name"].to_s
      end
      Context.element_types[tag] = type
    end
  end
end

#prepare_includes(head) ⇒ Object 



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# File 'lib/comet-html/generator.rb', line 88

def prepare_includes head
  result = ""
  included_paths = []
  head.css("include").each do |include_attribute|
    included_paths << include_attribute["src"].to_s
  end
  included_paths.uniq.each do |include_path|
    result += "# include \"#{include_path}\"\n"
  end
  @config["elements"].each do |element_data|
    if Context.referenced_types.include? element_data["require"]
      result += "# include \"#{element_data["include"]}\"\n"
    end
  end if !@config.nil? && !@config["elements"].nil?
  result
end

#relative_filepath ⇒ Object 



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# File 'lib/comet-html/generator.rb', line 51

def relative_filepath
  @filepath[@input.length..-1]
end

#set_config(config) ⇒ Object 



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# File 'lib/comet-html/generator.rb', line 47

def set_config config
  @config = config
end

#whitelisted_tags ⇒ Object 



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# File 'lib/comet-html/generator.rb', line 109

def whitelisted_tags
  ["svg"] + (if @config.nil? then [] else @config["whitelisted-tags"] || [] end)
end