Add a render method to view that only renders if the view is active and attached to the dom

[mandragorn]

No description provided.

[mandragorn]

something like this:

  /**
   * Renders the view only if it is active and part of the DOM.
   * @method _renderIfDisplayed
   * @private
   */
  _renderIfDisplayed: function() {
    if (this.isActive() && this.isAttached()) {
      this.render();
    }
  }

[mandragorn]

but not private and probably named something different.

[kentmw]

Why does the caller have to care about if it's attached? I'd rather just add this attached and active logic to the prerender method.

prerender: function() {
  return this.isAttached() && this.isActive();
}

The outward API shouldn't have to know or care if it's attached when calling render.

[kentmw]

Specifically, the view rendering should know if the content inside it will be affected if rendered detatched or deactivated. The view rendering should add it's own prerender logic to block a render command. I don't want to have to think about whether to use myChildView.render() or myChildView.renderIfAttached()