Class: Comet::SourceGenerator

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(object) ⇒ SourceGenerator

Returns a new instance of SourceGenerator.



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# File 'lib/comet-html/source-generator.rb', line 5

def initialize object
  @object = object
end

Instance Attribute Details

#object ⇒ Object (readonly)

Returns the value of attribute object.



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# File 'lib/comet-html/source-generator.rb', line 3

def object
  @object
end

#source ⇒ Object (readonly)

Returns the value of attribute source.



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# File 'lib/comet-html/source-generator.rb', line 3

def source
  @source
end

Instance Method Details

#dom_generator(el, indent) ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 170

def dom_generator el, indent
  result = ""
  count = 0
  el.children.each do |el|
    sub_object = object.find_class_for el
    if !sub_object.nil? && sub_object.is_anchorable?
      result += "," if count > 0
      result += "\n" + (" " * indent)
      result += sub_object.anchor_name
      count += 1
    elsif !(el["_cheerp_class"].nil?)
      next
    elsif el.name != "text" && el.name != "comment"
      reference = object.find_reference_for(el)
      html_attributes = make_attr_from_el el

      result += "," if count > 0
      result += "\n" + (" " * indent)

      result += if reference.nil? then "Comet::Element(\"#{el.name}\")" else reference.name end
      result += ".attr({#{html_attributes.join ','}})" if html_attributes.count > 0
      children_result = dom_generator el, indent + 2
      result += ".inner({#{children_result}\n#{" " * indent}})" if children_result.length > 0

      count += 1
    elsif el.name == "text" && !(el.text.strip.empty?)
      escaped_text = el.text.gsub /"/, "\\\""
      escaped_text.gsub! "\n", '\n'
      result += "," if count > 0
      result += "\n" + (" " * indent)
      result += "Comet::Element(\"span\").text(\"#{escaped_text}\")"
      count += 1
    end
  end
  result
end

#generate ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 9

def generate
  @source  = generate_constructor_header
  @source += generate_constructor_body
  @source += generate_constructor_footer + "\n"
  @source += generate_method_bind_attributes + "\n"
  @source += generate_method_trigger_binding_updates   
  @source
end

#generate_anchors_initializers ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 207

def generate_anchors_initializers
  result = ""
  object.repeaters.each do |repeater|
    result += "  #{repeater.repeater_name}.set_anchor(#{repeater.anchor_name}, #{anchor_symbol_to_enum :append});\n"
  end

  object.slots.each do |slot|
    result += "  #{slot.slot_ref}.set_anchor(#{slot.anchor_name}, #{anchor_symbol_to_enum :append});\n"
    result += "  #{slot.slot_ref}.set_element(std::make_shared<#{slot.typename}>(this));\n"
  end

  object.slot_plugins.each do |slot_plugin|
    ref = object.find_reference_for(slot_plugin.on_element)
    initializer = if slot_plugin.has_ref?
      "root->#{slot_plugin.el["ref"]}"
    else
      "std::make_shared<#{slot_plugin.typename}>(#{slot_plugin.constructor_params})"
    end
    result += "  #{ref.name}.slot_#{slot_plugin.slot_name}.set_element(#{initializer});\n"
  end
  result
end

#generate_binding_initializers ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 119

def generate_binding_initializers
  result = ""
  object.bindings.each do |binding|
    ref = object.find_reference_for binding.el
    initializer = if binding.binds_to_cpp_property?
      "Comet::Bindable([this]() { #{ref.name}.set_#{binding.attribute_name}(#{binding.code}); })"
    elsif binding.attribute_name == "show"
      "Comet::Bindable([this]() { #{ref.name}.visible(#{binding.code}); })"
    elsif binding.attribute_name == "text"
      "Comet::Bindable([this]() { #{ref.name}.text(#{binding.code}); })"
    elsif binding.attribute_name == "innerhtml"
      "Comet::Bindable([this]() { #{ref.name}.html(#{binding.code}); })"
    else
      "Comet::Bindable(#{ref.name}, \"#{binding.attribute_name}\", [this]() -> std::string { return Comet::lexical_cast<std::string>(#{binding.code}); })"
    end
    result += "  bound_attributes.push_back(#{initializer}#{binding.bind_mode});\n"
  end

  object.repeaters.each do |repeater|
    refresh_code = "#{repeater.repeater_name}.refresh(this, #{repeater.list_name});"
    initializer  = "Comet::Bindable([this]() { #{refresh_code} })"
    result += "  bound_attributes.push_back(#{initializer}#{repeater.bind_mode});\n"
  end

  object.event_listeners.each do |event_listener|
    ref = object.find_reference_for event_listener.el
    unless event_listener.is_cpp
      result += "  #{ref.name}.events->on(\"#{event_listener.attribute_name}\", [this](client::Event* _event) { #{event_listener.code}; });\n"
    else
      result += "  #{ref.name}.signaler.connect([this](std::string signal_name)\n"
      result += "  {\n"
      result += "    if (signal_name == \"#{event_listener.attribute_name}\")\n"
      result += "    {\n"
      result += "      #{event_listener.code};\n"
      result += "    }\n"
      result += "  });\n"
    end
  end
  result
end

#generate_constructor_body ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 95

def generate_constructor_body
  result  = generate_element_initializers
  result += generate_binding_initializers
  result += generate_dom_constructor
  result += generate_anchors_initializers
  result
end

#generate_constructor_footer ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 103

def generate_constructor_footer
  result = ""
  result += "}\n"
  result
end

#generate_constructor_header ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 52

def generate_constructor_header
  initializers = []      
  parent_symbol = "__p"
  root_getter   = get_root_from_parent_code parent_symbol
  
  case object.superclass
  when object.context.template_base_type then
    initializers << "#{object.context.template_base_type}(\"#{tag_name}\")"
#      when object.context.template_base_subtype then
#        initializers << "#{object.context.template_base_subtype}(\"#{tag_name}\", #{parent_symbol}->signaler)"
  end

  # Constructor
  result  = "HtmlTemplate::#{object.typename}::#{object.typename}("
  unless object.is_root?
    initializers << make_parent_to_root_initializer(parent_symbol)
    result += "#{object.parent.typename}* #{parent_symbol}"
  else
    initializers << "root(this)"
  end
  (object.refs.select{|r| r.has_initializer?}).each do |ref|
    initializers << "#{ref.name}(#{ref.initializer root_getter})"
  end
  unless object.is_root?
    initializers << "signaler(#{parent_symbol}->signaler)" unless object.implements_ibindable_view?
    initializers << "parent(#{parent_symbol})"
  end
  if object.class == Repeater
    initializers << "#{object.value_name}(__i)"
    result += ", #{object.value_type} __i"
  end
  unless object.is_root?
    object.slots.each do |slot|
      initializers << "#{slot.slot_ref}(#{root_getter}->#{slot.slot_ref})"
    end
  end
  result += ")"
  result += " : " + initializers.join(", ") if initializers.count > 0
  result += "\n"
  result += "{\n"
  result
end

#generate_dom_constructor ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 160

def generate_dom_constructor
  result = ""
  source_el = if object.is_root? then object.el.first else object.el end
  html_attributes = make_attr_from_el source_el
  result += "  attr({#{html_attributes.join ','}});\n" if html_attributes.length > 0
  dom_code = dom_generator object.el, 4
  result += "  inner({#{dom_code}\n  });\n" unless dom_code.empty?
  result
end

#generate_element_initializers ⇒ Object 



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

def generate_element_initializers
  result = ""
  object.refs.each do |ref|
    if ref.type == "Comet::Element"
      result += "  #{ref.name} = Comet::Element(\"#{ref.el.name}\");\n"
    end
  end
  result
end

#generate_method_bind_attributes ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 234

def generate_method_bind_attributes
  result = ""
  result += "void HtmlTemplate::#{object.typename}::bind_attributes()\n"
  result += "{\n"
  if inherits_binding_methods?
    result += "  #{object.superclass}::bind_attributes();\n"
  else
    result += "  bound_attributes.enable(signaler);\n"
  end
  object.refs.each do |ref|
    if ref.el && object.context.has_cpp_type?(ref.el)
      result += "  #{ref.name}.bind_attributes();\n"
      result += "  signaler.connect([this](std::string _event) { #{ref.name}.signaler.trigger(_event); });\n"
    end
  end
  object.repeaters.each do |repeater|
    result += "  #{repeater.repeater_name}.bind_attributes();\n"
  end
  object.slots.each do |slot|
    result += "  if (#{slot.slot_ref}.has_element())\n"
    result += "    #{slot.slot_ref}.get_element()->bind_attributes();\n"
  end
  result += "}\n"
  result
end

#generate_method_trigger_binding_updates ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 260

def generate_method_trigger_binding_updates
  result = ""
  result += "void HtmlTemplate::#{object.typename}::trigger_binding_updates()\n"
  result += "{\n"
  if inherits_binding_methods?
    result += "  #{object.superclass}::trigger_binding_updates();\n"
  else
    result += "  bound_attributes.update();\n"
  end
  object.refs.each do |ref|
    if ref.el && object.context.has_cpp_type?(ref.el)
      result += "  #{ref.name}.trigger_binding_updates();\n"
    end
  end
  object.repeaters.each do |repeater|
    result += "  #{repeater.repeater_name}.trigger_binding_updates();\n"
  end
  object.slots.each do |slot|
    result += "  if (#{slot.slot_ref}.has_element())\n"
    result += "    #{slot.slot_ref}.get_element()->trigger_binding_updates();\n"
  end
  result += "}\n"
  result
end

#get_root_from_parent_code(parent_symbol) ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 34

def get_root_from_parent_code parent_symbol
  if object.is_root?
    "this"
  else
    result = parent_symbol
    current_parent = object.parent
    until current_parent.parent.nil?
      result += "->parent"
      current_parent = current_parent.parent
    end
    result
  end
end

#inherits_binding_methods? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/comet-html/source-generator.rb', line 230

def inherits_binding_methods?
  !([object.context.template_base_type, object.context.template_base_subtype].include? object.superclass)
end

#make_parent_to_root_initializer(parent_symbol) ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 48

def make_parent_to_root_initializer parent_symbol
  "root(#{get_root_from_parent_code(parent_symbol)})"
end

#root_ptr ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 30

def root_ptr
  if object.parent.nil? then "this" else "root" end
end

#tag_name ⇒ Object 



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# File 'lib/comet-html/source-generator.rb', line 18

def tag_name
  if @object.parent.nil?
    if @object.el.first["tag-name"].nil?
      @object.typename.dasherize
    else
      @object.el.first["tag-name"]
    end
  else
    @object.el.name
  end
end