From 8bf427e1c104e4287fe97a43157c14936ecac829 Mon Sep 17 00:00:00 2001
From: Vitor Fernandes <vitor.fernandes@gotvmediasoftware.com>
Date: Wed, 6 May 2015 16:43:22 +0100
Subject: [PATCH] feat(PdfGenerator): allow generated pages to be appended to a
 PdfDocument

Adds a new method AddPdfPages that generates and appends pages to the specified PdfDocument. This allows the creation of a PdfDocument page by page, where each set of pages can have different layouts and allows better control of page breaks/contents.
---
 Source/HtmlRenderer.PdfSharp/PdfGenerator.cs | 42 ++++++++++++++++++--
 1 file changed, 39 insertions(+), 3 deletions(-)

diff --git a/Source/HtmlRenderer.PdfSharp/PdfGenerator.cs b/Source/HtmlRenderer.PdfSharp/PdfGenerator.cs
index 08b270586..c8c167e05 100644
--- a/Source/HtmlRenderer.PdfSharp/PdfGenerator.cs
+++ b/Source/HtmlRenderer.PdfSharp/PdfGenerator.cs
@@ -89,7 +89,44 @@ public static PdfDocument GeneratePdf(string html, PdfGenerateConfig config, Css
         {
             // create PDF document to render the HTML into
             var document = new PdfDocument();
-            
+
+            // add rendered PDF pages to document
+            AddPdfPages(document, html, config, cssData, stylesheetLoad, imageLoad);
+
+            return document;
+        }
+
+        /// <summary>
+        /// Create PDF pages from given HTML and appends them to the provided PDF document.<br/>
+        /// </summary>
+        /// <param name="document">PDF document to append pages to</param>
+        /// <param name="html">HTML source to create PDF from</param>
+        /// <param name="pageSize">the page size to use for each page in the generated pdf </param>
+        /// <param name="margin">the margin to use between the HTML and the edges of each page</param>
+        /// <param name="cssData">optional: the style to use for html rendering (default - use W3 default style)</param>
+        /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param>
+        /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param>
+        /// <returns>the generated image of the html</returns>
+        public static void AddPdfPages(PdfDocument document, string html, PageSize pageSize, int margin = 20, CssData cssData = null, EventHandler<HtmlStylesheetLoadEventArgs> stylesheetLoad = null, EventHandler<HtmlImageLoadEventArgs> imageLoad = null)
+        {
+            var config = new PdfGenerateConfig();
+            config.PageSize = pageSize;
+            config.SetMargins(margin);
+            AddPdfPages(document, html, config, cssData, stylesheetLoad, imageLoad);
+        }
+
+        /// <summary>
+        /// Create PDF pages from given HTML and appends them to the provided PDF document.<br/>
+        /// </summary>
+        /// <param name="document">PDF document to append pages to</param>
+        /// <param name="html">HTML source to create PDF from</param>
+        /// <param name="config">the configuration to use for the PDF generation (page size/page orientation/margins/etc.)</param>
+        /// <param name="cssData">optional: the style to use for html rendering (default - use W3 default style)</param>
+        /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param>
+        /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param>
+        /// <returns>the generated image of the html</returns>
+        public static void AddPdfPages(PdfDocument document, string html, PdfGenerateConfig config, CssData cssData = null, EventHandler<HtmlStylesheetLoadEventArgs> stylesheetLoad = null, EventHandler<HtmlImageLoadEventArgs> imageLoad = null)
+        {
             XSize orgPageSize;
             // get the size of each page to layout the HTML in
             if (config.PageSize != PageSize.Undefined)
@@ -146,11 +183,10 @@ public static PdfDocument GeneratePdf(string html, PdfGenerateConfig config, Css
                     HandleLinks(document, container, orgPageSize, pageSize);
                 }
             }
-
-            return document;
         }
 
 
+
         #region Private/Protected methods
 
         /// <summary>