Class: RText::DefaultServiceProvider

Inherits:
Object
  • Object
show all
Defined in:
lib/rtext/default_service_provider.rb

Defined Under Namespace

Classes: FileProblems, OpenElementChoice, Problem, ReferenceCompletionOption, ReferenceTarget

Instance Method Summary collapse

Constructor Details

#initialize(language, fragmented_model, model_loader, options = {}) ⇒ DefaultServiceProvider

Creates a DefaultServiceProvider. Options:

:resolver
  a reference resolver responding to the methods provided by DefaultResolver
  default: DefaultResolver



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# File 'lib/rtext/default_service_provider.rb', line 14

def initialize(language, fragmented_model, model_loader, options={})
  @lang = language
  @model = fragmented_model
  @loader = model_loader 
  @element_name_index = nil
  @result_limit = options[:result_limit]
  @model.add_fragment_change_listener(proc {|fragment, kind|
    @element_name_index = nil
  })
  @resolver = options[:resolver] || DefaultResolver.new(language)
end

Instance Method Details

#element_name_index ⇒ Object 



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# File 'lib/rtext/default_service_provider.rb', line 189

def element_name_index
  return @element_name_index if @element_name_index
  @element_name_index = {}
  @model.index.each_pair do |ident, elements|
    last_part = ident.split(/\W/).last
    next unless last_part
    key = last_part[0..0].downcase
    @element_name_index[key] ||= {} 
    @element_name_index[key][ident] = elements
  end
  @element_name_index
end

#get_backward_reference_targets(identifier, element, feature, index) ⇒ Object 



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# File 'lib/rtext/default_service_provider.rb', line 99

def get_backward_reference_targets(identifier, element, feature, index)
  result = []
  targets = @model.index[@lang.identifier_provider.call(element, nil, nil, nil)]
  if targets && @lang.per_type_identifier
    targets = targets.select{|t| t.class == element.class}
  end
  if targets && targets.size == 1
    target = targets.first
    refs = target.class.ecore.eAllReferences.select{|r|
      r.eOpposite && !r.containment && !r.eOpposite.containment}
    # we only want references configured in the RText language that point to this element
    # thus we don't follow references here which are configured in the language
    # (because for those the other direction is not configured in the language)
    refs -= @lang.non_containments(target.class.ecore)
    elements = refs.collect{|r| target.getGenericAsArray(r.name)}.flatten
    elements.each do |e|
      if @lang.fragment_ref(e)
        path = File.expand_path(@lang.fragment_ref(e).fragment.location)
        display_name = ""
        ident = @lang.identifier_provider.call(e, nil, nil, nil)
        display_name += "#{ident} " if ident
        display_name += "[#{e.class.ecore.name}]"
        result << ReferenceTarget.new(path, @lang.line_number(e), display_name)
      end
    end
  end
  result
end

#get_completion_options(context) ⇒ Object 



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# File 'lib/rtext/default_service_provider.rb', line 38

def get_completion_options(context)
  completer = RText::DefaultCompleter.new(@lang) 
  class << completer
    attr_accessor :service_provider
    def reference_options(context) 
      service_provider.get_reference_completion_options(context).collect {|o|
        DefaultCompleter::CompletionOption.new(o.identifier, "<#{o.type}>")}
    end
  end
  completer.service_provider = self
  completer.complete(context)
end

#get_forward_reference_targets(identifier, element, feature, index) ⇒ Object 



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# File 'lib/rtext/default_service_provider.rb', line 82

def get_forward_reference_targets(identifier, element, feature, index)
  result = []
  ref_value = element.getGenericAsArray(feature.name)[index]
  if ref_value.is_a?(RGen::MetamodelBuilder::MMProxy)
    uref =  RGen::Instantiator::ReferenceResolver::UnresolvedReference.new(
        element, feature.name, ref_value)
    targets = @resolver.find_targets(uref, @model)
    targets.each do |t|
      if @lang.fragment_ref(t)
        path = File.expand_path(@lang.fragment_ref(t).fragment.location)
        result << ReferenceTarget.new(path, @lang.line_number(t), "#{identifier} [#{t.class.ecore.name}]")
      end
    end
  end
  result
end

#get_link_targets(link_descriptor) ⇒ Object 



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# File 'lib/rtext/default_service_provider.rb', line 72

def get_link_targets(link_descriptor)
  if link_descriptor.backward 
    get_backward_reference_targets(link_descriptor.value, 
      link_descriptor.element, link_descriptor.feature, link_descriptor.index)
  else
    get_forward_reference_targets(link_descriptor.value, 
      link_descriptor.element, link_descriptor.feature, link_descriptor.index)
  end
end

#get_open_element_choices(pattern) ⇒ Object 



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# File 'lib/rtext/default_service_provider.rb', line 153

def get_open_element_choices(pattern)
  result = []
  return result unless pattern
  sub_index = element_name_index[pattern[0..0].downcase]
  truncate_result = false
  sub_index && sub_index.each_pair do |ident, elements|
    if !truncate_result && ident.split(/\W/).last.downcase.index(pattern.downcase) == 0
      elements.each do |e|
        if @lang.fragment_ref(e)
          non_word_index = ident.rindex(/\W/)
          if non_word_index
            name = ident[non_word_index+1..-1]
            scope = ident[0..non_word_index-1]
          else
            name = ident
            scope = ""
          end
          display_name = "#{name} [#{e.class.ecore.name}]"
          display_name += " - #{scope}" if scope.size > 0
          path = File.expand_path(@lang.fragment_ref(e).fragment.location)
          if !@result_limit || result.size < @result_limit
            result << OpenElementChoice.new(display_name, path, @lang.line_number(e))
          else
            truncate_result = true
          end
        end
      end
    end
  end
  result = result.sort{|a,b| a.display_name <=> b.display_name}
  if truncate_result
    result << OpenElementChoice.new("--- result truncated, showing first #{@result_limit} entries ---", "/", 1)
  end
  result
end

#get_problems(options = {}) ⇒ Object 



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# File 'lib/rtext/default_service_provider.rb', line 130

def get_problems(options={})
  load_model(options)
  result = []
  @model.fragments.sort{|a,b| a.location <=> b.location}.each do |fragment|
    problems = []
    if fragment.data && fragment.data[:problems]
      fragment.data[:problems].each do |p|
        problems << Problem.new("Error", p.line, p.message)
      end
    end
    fragment.unresolved_refs.each do |ur|
      # TODO: where do these proxies come from?
      next unless ur.proxy.targetIdentifier
      problems << Problem.new("Error", @lang.line_number(ur.element), "unresolved reference #{ur.proxy.targetIdentifier}")
    end
    if problems.size > 0
      result << FileProblems.new(File.expand_path(fragment.location), problems)
    end
  end
  result
end

#get_reference_completion_options(context) ⇒ Object 



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# File 'lib/rtext/default_service_provider.rb', line 52

def get_reference_completion_options(context)
  if @model.environment
    targets = @model.environment.find(:class => context.feature.eType.instanceClass)
  else
    clazz = context.feature.eType.instanceClass
    targets = @model.index.values.flatten.select{|e| e.is_a?(clazz)}
  end
  index = 0
  targets.collect{|t| 
    ident = @lang.identifier_provider.call(t, context.element, context.feature, index)
    index += 1
    if ident
      ReferenceCompletionOption.new(ident, t.class.ecore.name)
    else
      nil
    end
  }.compact.sort{|a,b| a.identifier <=> b.identifier}
end

#language ⇒ Object 



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# File 'lib/rtext/default_service_provider.rb', line 26

def language
  @lang
end

#load_model(options = {}) ⇒ Object 



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# File 'lib/rtext/default_service_provider.rb', line 30

def load_model(options={})
  if options[:on_progress]
    @loader.load(:on_progress => options[:on_progress])
  else
    @loader.load
  end
end