Module: Zena::Use::Ajax::ViewMethods

Includes:
RubyLess
Defined in:
lib/zena/use/ajax.rb

Instance Method Summary collapse

Instance Method Details

#add_drag_id(dom_id, js_options = nil) ⇒ Object

Used by zafu to set dom_id that need to be made draggable.



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# File 'lib/zena/use/ajax.rb', line 161

def add_drag_id(dom_id, js_options = nil)
  @drag_ids ||= {}
  (@drag_ids[js_options] ||= []) << dom_id
end

#add_drop_id(dom_id, options) ⇒ Object

Used by zafu to transform a dom_id into a droppable element.



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# File 'lib/zena/use/ajax.rb', line 167

def add_drop_id(dom_id, options)
  js_data << "Droppables.add('#{dom_id}', {hoverclass:'#{options[:hover] || 'drop_hover'}', onDrop:function(element){
  new Ajax.Request('#{options[:url]}', {asynchronous:true, evalScripts:true, method:'put', parameters:'drop=' + encodeURIComponent(element.id)});
}});"
end

#add_toggle_id(dom_id, group_name, role, opts = {}) ⇒ Object 



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# File 'lib/zena/use/ajax.rb', line 173

def add_toggle_id(dom_id, group_name, role, opts = {})
  arity = opts[:arity] || 'many'
  if js = opts[:js]
    js = ", js:function(e) { #{js} }"
  end
  
  @toggle_ids ||= {}
  unless list = @toggle_ids[group_name]
    list = @toggle_ids[group_name] = []

    if other = yield
      found = other.rel[role].other_zips
    else
      found = []
    end
    url = "/nodes/#{other.zip}"
    js_data << "#{group_name} = {list:#{found.inspect}, url:#{url.inspect}, role:#{role.inspect}, arity:#{arity.inspect}#{js}};"
  end
  list << dom_id
end

#filter_form(node, dom_id, loading, upd) ⇒ Object 



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# File 'lib/zena/use/ajax.rb', line 194

def filter_form(node, dom_id, loading, upd)
  if loading
    loading = "\n#{loading}($('#{upd}'));"
  else
    loading = ''
  end
  # Disable 'redir' parameter during preview or filter.
  js_data << %Q{new Form.Observer('#{dom_id}', 0.3, function(element, value) {#{loading}
    var data = Form.serialize('#{dom_id}').gsub(/&redir=/,'&no_redir=')
    new Ajax.Request('#{zafu_node_path(node)}', {asynchronous:true, evalScripts:true, method:'post', parameters:data})
  });}
end

#ndom_id(node = @node, append_form = true) ⇒ Object

Return the DOM id for a node. We had to name this method ‘ndom_id’ because we want to avoid the clash with Rails’ dom_id method.



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# File 'lib/zena/use/ajax.rb', line 10

def ndom_id(node = @node, append_form = true)
  if node.kind_of?(Node) && !node.new_record?
    if params[:action] == 'create' && !params[:udom_id] && !params[:s]
      # !params[:s] is to not use this when executing Zena.post
      
      # We cannot filter with params[:zadd] because this breaks when editing in lists.
      return "#{params[:dom_id]}_#{node.zip}"
    end
  elsif append_form && node.kind_of?(Node) && params[:zadd] 
    return "#{params[:dom_id]}_#{node.zip.to_i}"
  end

  @dom_id || params[:udom_id] || params[:dom_id]
end

#preview_node(node) ⇒ Object

Load parameters in node before rendering. SECURITY: There may be a security threat here if the node attributes are used for queries or relations.



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# File 'lib/zena/use/ajax.rb', line 209

def preview_node(node)
  return nil if !node.kind_of?(Node)
  if attrs = params[:node]
    # Return a copy
    new_node = node.dup
    new_node.version = node.version.dup
    new_node.attributes = Node.transform_attributes(params[:node], node, true)
    return new_node
  else
    return node
  end
end

#render_js(in_html = true) ⇒ Object

Include draggable ids in bottom of page Javascript.



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# File 'lib/zena/use/ajax.rb', line 223

def render_js(in_html = true)
  if @drag_ids
    @drag_ids.each do |js_options, list|
      if js_options.nil?
        js_data << %Q{#{list.inspect}.each(Zena.draggable);}
      else
        js_data << %Q{#{list.inspect}.each(function(item) { Zena.draggable(item, #{js_options})});}
      end
    end
  end

  if @toggle_ids
    @toggle_ids.each do |group_name, list|
      js_data << %Q{#{list.inspect}.each(function(item) { Zena.set_toggle(item, #{group_name})});}
    end
  end

  # Super is in Zena::Use::Rendering
  super
end

#update_page_content(page, obj) ⇒ Object

RJS to update a page after create/update/destroy



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# File 'lib/zena/use/ajax.rb', line 26

def update_page_content(page, obj)
  unless params[:dom_id]
    # simply reply with failure or success
    if !obj.errors.empty?
      page << "alert(#{obj.errors.first.join(': ')});"
      page << "return false;" # How to avoid 'onSuccess' ?
    elsif params[:udom_id] == '_page'
      # reload page
      page << "document.location.href = document.location.href;"
    else
      # ?
    end
    return
  end

  if params[:t_id] && obj.errors.empty?
    obj = secure(Node) { Node.find_by_zip(params[:t_id])}
    @node = obj
  end

  base_class = obj.kind_of?(Node) ? Node : obj.class

  if obj.new_record?
    # A. could not create object: show form with errors
    page.replace ndom_id, :file => template_path_from_template_url('_form')
  elsif @errors || !obj.errors.empty?
    # B. could not update/delete: show errors
    form_file = template_path_from_template_url('_form')
    if File.exist?(form_file)
      page.replace ndom_id, :file => form_file
    else
      page.insert_html :top, params[:dom_id], :inline => render_errors
    end
  elsif params[:udom_id]
    if params[:udom_id] == '_page'
      # reload page
      page << "document.location.href = document.location.href;"
    else
      # C. update another part of the page
      if node_id = params[:u_id]
        if node_id.to_i != obj.zip
          if base_class == Node
            instance_variable_set("@#{base_class.to_s.underscore}", secure(base_class) { base_class.find_by_zip(node_id) })
          else
            instance_variable_set("@#{base_class.to_s.underscore}", secure(base_class) { base_class.find_by_id(node_id) })
          end
        end
      end
      page.replace params[:udom_id], :file => template_path_from_template_url('', params[:u_url] || params[:t_url])
      if params[:upd_both]
        @dom_id = params[:dom_id]
        page.replace params[:dom_id], :file => template_path_from_template_url
      end
      if params[:done] && params[:zadd]
        page.toggle "#{params[:dom_id]}_0", "#{params[:dom_id]}_add"
        page << params[:done]
      elsif params[:done]
        page << params[:done]
      end
    end
  else
    # D. normal update
    #if params[:dom_id] == '_page'
    #  # reload page
    #  page << "document.location.href = document.location.href;"
    #

    case params[:action]
    when 'edit'
      page.replace params[:dom_id], :file => template_path_from_template_url
      page << "$('#{params[:dom_id]}_form_t').focusFirstElement();"
    when 'create'
      if params[:zadd]
        # ADD WITH FORM...
        pos = params[:position]  || :before
        ref = params[:reference] || "#{params[:dom_id]}_add"
        page.insert_html pos.to_sym, ref, :file => template_path_from_template_url
        if obj.kind_of?(Node)
          @node = obj.parent.new_child(:class => obj.class)
        else
          instance_variable_set("@#{base_class.to_s.underscore}", obj.clone)
        end
        page.replace ndom_id, :file => template_path_from_template_url('_form')
        if params[:done]
          page << params[:done]
        elsif params[:zadd]
          page.toggle "#{params[:dom_id]}_0", "#{params[:dom_id]}_add"
        end
      else
        # Zena.post operation
        page.replace ndom_id, :file => template_path_from_template_url
        page << params[:done] if params[:done]
      end
    when 'update'
      page.replace ndom_id, :file => template_path_from_template_url
      page << params[:done] if params[:done]
    when 'destroy'
      page << %Q{
        new Effect.Highlight('#{ndom_id}', {
          duration: 0.3,
          afterFinish: function() {
            new Effect.Fade('#{ndom_id}', {
              duration: 0.5,
              afterFinish: function() {
              $('#{ndom_id}').remove();
              }
            });
          }
        });
      }
    when 'drop'
      case params[:done]
      when 'remove'
        page.visual_effect :highlight, params[:drop], :duration => 0.3
        page.visual_effect :fade, params[:drop], :duration => 0.3
      end
      page.replace params[:dom_id], :file => template_path_from_template_url
    else
      if position = params[:insert]
        page.call 'Zena.insert_inner', params[:dom_id], position, render(:file => template_path_from_template_url)
      else
        page.replace params[:dom_id], :file => template_path_from_template_url
      end
    end
  end
  if params[:redir]
    page << "window.location.href = '#{params[:redir]}';"
  end
  if params[:reload]
    page << "Zena.reload(#{params[:reload].inspect});"
  end
  page << render_js(false)
end