tracks/app/views/todos/toggle_check.js.erb

<% if !@saved -%>
  TracksPages.page_notify('error', "Could not mark this todo complete", 5);
<% else -%>
  <% if @wants_redirect_after_complete -%>
    redirect_after_complete();
  <% else
    animation = []
    animation << "remove_todo"
    if @todo.completed?
      animation << "add_to_completed_container"
      animation << "add_new_recurring_todo"
      animation << "activate_pending_todos"
      animation << "remove_source_container"
    else
      animation << "add_todo_to_context"
      animation << "block_predecessors"
    end -%>
    <%= render_animation(animation) %>
    TracksPages.set_page_badge(<%= @down_count %>);
  <% end -%>
<% end -%>

function redirect_after_complete() {
  redirect_to("<%= project_path(@todo.project) -%>");
}

function remove_todo(next_steps) {
  $('#<%= dom_id(@todo) %>').fadeOut(400, function() {
    $('#<%= dom_id(@todo) %>').remove();
    <%= show_empty_message_in_source_container -%>
    next_steps.go();
  });
}

function add_to_completed_container(next_steps) {
  <% unless current_user.prefs.hide_completed_actions? -%>
    $('#<%= item_container_id(@todo) %>').append(html_for_todo());
    $("#empty-d").slideUp(100);
    highlight_updated_todo(next_steps);
  <% end -%>
}

function add_todo_to_context(next_steps) {
  $('#<%= item_container_id(@todo) %>').append(html_for_todo());
  $('#c<%= @todo.context_id %>').fadeIn(500, function() {
    highlight_updated_todo(next_steps);
    <%= show_empty_message_in_source_container -%>
  });
}

function add_new_recurring_todo(next_steps) {
  <%  # show new todo if the completed todo was recurring
    if @todo.from_recurring_todo?
      unless @new_recurring_todo.nil? || @new_recurring_todo.deferred? -%>
      $('#<%= item_container_id(@new_recurring_todo) %>').append(html_for_recurring_todo());
      $('#c<%= @new_recurring_todo.context_id %>').fadeIn(500, function() {
        highlight_updated_recurring_todo(next_steps);
      });
   <% else
        if @todo.recurring_todo.todos.active.count == 0 && @new_recurring_todo.nil? -%>
          TracksPages.page_notify('notice', "<%=t('todos.recurrence_completed')%>", 6);
   <%   end
      end
    end -%>
}

<% if @new_recurring_todo # hide js if @new_recurring_todo is not there-%>
function highlight_updated_recurring_todo(next_steps) {
  highlight_todo('#<%= dom_id(@new_recurring_todo)%>');
  next_steps.go();
}
<% end -%>

function highlight_updated_todo(next_steps) {
  highlight_todo('#<%= dom_id(@todo)%>');
  next_steps.go();
}

function highlight_todo(id) {
  $(id).effect('highlight', {}, 2000, function(){ });
}

function activate_pending_todos(next_steps) {
 <% # Activate pending todos that are successors of the completed
    if @saved && @pending_to_activate
      # do not render the js in case of an error or if no todos to activate
      @pending_to_activate.each do |t|
        if source_view_is(:project) or source_view_is(:tag) -%>
          $('#<%= dom_id(t) %>').fadeOut(400, function() {
            $('#<%= dom_id(t) %>').remove();
            next_steps.go();
          });
 <%     end -%>
        $('#<%= item_container_id(t) %>').append("<%= escape_javascript(render(:partial => t, :locals => { :parent_container_type => parent_container_type }))%>");
        highlight_todo('#<%= dom_id(t)%>');
 <%   end -%>
 <% end -%>
}

function block_predecessors(next_steps) {
 <% # Activate pending todos that are successors of the completed
    if @saved && @active_to_block
      # do not render the js in case of an error or if no todos to block
      @active_to_block.each do |t| %>
        $('#<%= dom_id(t) %>').fadeOut(400, function() {
          $('#<%= dom_id(t) %>').remove();
 <%       if source_view_is(:project) or source_view_is(:tag) # Insert it in deferred/pending block if existing -%>
            $('#<%= item_container_id(t) %>').append("<%= escape_javascript(render(:partial => t, :locals => { :parent_container_type => parent_container_type }))%>");
            highlight_todo('#<%= dom_id(t)%>');
 <%       end -%>
        });
 <%   end -%>
      next_steps.go();
 <% end -%>
}

function remove_source_container(next_steps) {
  <% if (@remaining_in_context == 0 && source_view_is_one_of(:todo, :tag))
       # remove context with deleted todo
  -%>
       $('#c<%=@todo.context_id%>').fadeOut(1000, function() {
         next_steps.go();
       });
  <% end %>
}

function html_for_todo() {
  return "<%= @saved ? escape_javascript(render(:partial => @todo, :locals => { :parent_container_type => "completed" })) : "" %>";
}

function html_for_recurring_todo() {
  return "<%= @saved ? escape_javascript(render(:partial => @new_recurring_todo, :locals => { :parent_container_type => parent_container_type })) : "" %>";
}