Class: ViewCell

Inherits:
Object
  • Object
show all
Defined in:
lib/view-cell/class.rb,
lib/view-cell/proxy.rb,
lib/view-cell/instance.rb

Defined Under Namespace

Modules: ProxyMethod Classes: Proxy

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parent = nil, vars = {}) ⇒ ViewCell

Returns a new instance of ViewCell.



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# File 'lib/view-cell/instance.rb', line 6

def initialize parent=nil, vars={}
  @_parent = parent
  vars.each { |k,v| instance_variable_set "@#{k}", v}
  before
end

Class Method Details

.cell(parent, *args) ⇒ Object

cell.user.profile cell(:user, user: @user).profile



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# File 'lib/view-cell/class.rb', line 20

def cell parent, *args
  if args.first
    ViewCell.get(parent, *args)
  else
    ViewCell::Proxy.new(parent)
  end
end

.delegate(*list) ⇒ Object

delegate current scope methods to parent binding



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# File 'lib/view-cell/class.rb', line 12

def delegate *list
  list.each do |el|
    define_method(el) { |*args, &block| parent.send(el, *args, &block) }
  end
end

.get(parent, name, vars = {}) ⇒ Object

load cell based on a name, pass context and optional vars ViewCell.get(:user, self) -> UserCell.new(self)



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# File 'lib/view-cell/class.rb', line 5

def get parent, name, vars={}
  ('%sCell' % name.to_s.classify)
    .constantize
    .new parent, vars
end

.template_root(name = nil) ⇒ Object

set or get template root directory



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# File 'lib/view-cell/class.rb', line 29

def template_root name=nil
  if name
    self.class.instance_variable_set :@template_root, name
  else
    self.class.instance_variable_get :@template_root
  end
end

Instance Method Details

#before ⇒ Object

called every time for every method in a class



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# File 'lib/view-cell/instance.rb', line 13

def before
end

#cell(*args) ⇒ Object

call



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# File 'lib/view-cell/instance.rb', line 26

def cell *args
  ViewCell.get @_parent, *args
end

#parent(&block) ⇒ Object

access parent scope



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# File 'lib/view-cell/instance.rb', line 17

def parent &block
  if block
    @_parent.instance_exec self, &block
  else
    @_parent
  end
end

#render(name) ⇒ Object

render template by name



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# File 'lib/view-cell/instance.rb', line 31

def render name
  template_root = self.class.template_root
  class_part    = self.class.to_s.underscore.sub(/_cell$/, '')

  if template_root
    name = [template_root, name].join '/'
  elsif name.is_a?(Symbol)
    name = './app/views/cells/%s/%s' % [class_part, name]
  elsif name.to_s =~ /^\w/
    name = './app/views/cells/%s' % name
  end

  name = name % class_part if name.include?('%s')

  RENDER_CACHE.delete(name) if _development?

  RENDER_CACHE[name] ||= proc do
    # find extension if one not provided
    file_name = name

    unless name =~ /\.\w{2,4}$/
      if (file = Dir['%s*' % name].first)
        file_name = file
      end
    end

    unless File.exist?(file_name)
      raise ArgumentError, 'Template "%s.*" not found' % name
    end

    Tilt.new(file_name)
  end.call

  out = RENDER_CACHE[name].render(self)
  out.respond_to?(:html_safe) ? out.html_safe : out
end