using System;
using System.Drawing;
using System.Web.Mvc;
using System.Configuration;
using SelectPdf;

namespace SelectPdf.Samples.Controllers
{
    public class WebElementsLocationController : Controller
    {
        // GET: WebElementsLocation
        public ActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public ActionResult SubmitAction(FormCollection fields)
        {
            RenderingEngine renderingEngine =
                (RenderingEngine)Enum.Parse(typeof(RenderingEngine), Request["DdlRenderingEngine"], true);

            // instantiate a html to pdf converter object
            HtmlToPdf converter = new HtmlToPdf();
            converter.Options.RenderingEngine = renderingEngine;
            converter.Options.CefEnginePath = Server.MapPath(ConfigurationManager.AppSettings["CefEnginePath"]);

            // set the css selectors for the web elements
            // whose positions will be retrieved
            converter.Options.WebElementsMappingOptions.CssSelectors =
                fields["TxtElements"].Split(new char[] { ',' });

            // create a new pdf document converting an url
            PdfDocument doc = converter.ConvertUrl(fields["TxtUrl"]);

            // get all web elements and mark/highlight them with a green rectangle
            foreach (WebElement element in
                converter.Options.WebElementsMappingOptions.Result)
            {
                // each web element has several rendering rectangles 
                // (if it is displayed in more than 1 page)
                foreach (WebElementPdfRectangle webElementRectangle
                    in element.PdfRectangles)
                {
                    // get the PDF page
                    PdfPage page = doc.Pages[webElementRectangle.PageIndex];
                    RectangleF rectangle = webElementRectangle.Rectangle;

                    // highlight the HTML element
                    PdfRectangleElement blueRectangle = new PdfRectangleElement(
                        rectangle.X, rectangle.Y,
                        rectangle.Width, rectangle.Height);
                    blueRectangle.ForeColor = Color.Blue;

                    page.Add(blueRectangle);
                }
            }

            // save pdf document
            byte[] pdf = doc.Save();

            // close pdf document
            doc.Close();

            // return resulted pdf document
            FileResult fileResult = new FileContentResult(pdf, "application/pdf");
            fileResult.FileDownloadName = "Document.pdf";
            return fileResult;
        }
    }
}