BranchPresets.LayoutHelper.ApplyActionToLayoutXml C# (CSharp) Method

		private static string ApplyActionToLayoutXml(string xml, Func<RenderingDefinition, RenderingActionResult> action)
		{
			LayoutDefinition layout = LayoutDefinition.Parse(xml);

			xml = layout.ToXml(); // normalize the output in case of any minor XML differences (spaces, etc)

			// loop over devices in the rendering
			for (int deviceIndex = layout.Devices.Count - 1; deviceIndex >= 0; deviceIndex--)
			{
				var device = layout.Devices[deviceIndex] as DeviceDefinition;

				if (device == null) continue;

				// loop over renderings within the device
				for (int renderingIndex = device.Renderings.Count - 1; renderingIndex >= 0; renderingIndex--)
				{
					var rendering = device.Renderings[renderingIndex] as RenderingDefinition;

					if (rendering == null) continue;

					// run the action on the rendering
					RenderingActionResult result = action(rendering);

					// remove the rendering if the action method requested it
					if (result == RenderingActionResult.Delete)
						device.Renderings.RemoveAt(renderingIndex);
				}
			}

			string layoutXml = layout.ToXml();

			// save a modified layout value if necessary
			if (layoutXml != xml)
			{
				return layoutXml;
			}

			return null;
		}
	}