0.0.0.5 release prep

Added utility to merge/interleave pdfs.

Author: nhmkdev

PdfConstruct/Merge/PDFMerge.cs

@@ -0,0 +1,134 @@
+////////////////////////////////////////////////////////////////////////////////
+// The MIT License (MIT)
+//
+// Copyright (c) 2020 Tim Stair
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+////////////////////////////////////////////////////////////////////////////////
+
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Windows.Forms;
+using PdfSharp.Pdf;
+using PdfSharp.Pdf.IO;
+using Support.UI;
+
+namespace PdfConstruct.Merge
+{
+    public class PDFMerge
+    {
+        private QueryPanel zQuery;
+        const string FILE_ONE = "1";
+        const string FILE_TWO = "2";
+        const string OPEN_RESULT = "OPEN";
+
+        private const string PDF_FILTER_STRING = "PDF files (*.pdf)|*.pdf";
+
+        public void SetupPanel(Panel zPanel)
+        {
+            zQuery = new QueryPanel(zPanel, 80, false);
+            zQuery.AddLabel("The first page will be taken from File 1", 20);
+            SetupDragDropFile(zQuery.AddFileBrowseBox("File 1", string.Empty, PDF_FILTER_STRING, FILE_ONE));
+            SetupDragDropFile(zQuery.AddFileBrowseBox("File 2", string.Empty, PDF_FILTER_STRING, FILE_TWO));
+            zQuery.AddCheckBox("Open Result", false, OPEN_RESULT);
+            zQuery.FinalizeControls();
+        }
+
+        private void SetupDragDropFile(TextBox textBox)
+        {
+            textBox.AllowDrop = true;
+            textBox.DragEnter += (sender, e) =>
+            {
+                e.Effect = e.Data.GetDataPresent(DataFormats.FileDrop)
+                    ? DragDropEffects.Link
+                    : DragDropEffects.None;
+            };
+            textBox.DragDrop += (sender, e) =>
+            {
+                if (e.Data.GetDataPresent(DataFormats.FileDrop))
+                {
+                    var arrayFiles = (string[])e.Data.GetData(DataFormats.FileDrop, false);
+                    if(arrayFiles.Length > 0) ((TextBox) sender).Text = arrayFiles[0];
+                }
+            };
+        }
+
+        public void SetupPDFMerge(string sFileOut)
+        {
+            var sFile1 = zQuery.GetString(FILE_ONE);
+            var sFile2 = zQuery.GetString(FILE_TWO);
+
+            if (!File.Exists(sFile1) || !File.Exists(sFile2))
+            {
+                MessageBox.Show("Input Files Must Exist", "Please select existing files to merge.",
+                    MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
+                return;
+            }
+
+            if (string.IsNullOrWhiteSpace(sFileOut))
+            {
+                MessageBox.Show("Output Files Must Be Specified", "Please specify an output file.",
+                    MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
+                return;
+            }
+
+            try
+            {
+                MergePDFs(sFile1, sFile2, sFileOut);
+                MessageBox.Show("Export Complete", "Export Complete", MessageBoxButtons.OK, MessageBoxIcon.Information);
+            }
+            catch (Exception e)
+            {
+                MessageBox.Show(e.Message, "PDF Merge Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
+                return;
+            }
+            if (zQuery.GetBool(OPEN_RESULT))
+            {
+                Process.Start(sFileOut);
+            }
+        }
+
+        static void MergePDFs(string sFile1, string sFile2, string sOutFile)
+        {
+            var zDoc1 = PdfReader.Open(sFile1, PdfDocumentOpenMode.Import);
+            var zDoc2 = PdfReader.Open(sFile2, PdfDocumentOpenMode.Import);
+            var zDocOutput = new PdfDocument();
+            var nDocIdx = 0;
+            while (nDocIdx < zDoc1.PageCount && nDocIdx < zDoc2.PageCount)
+            {
+                zDocOutput.AddPage(zDoc1.Pages[nDocIdx]);
+                zDocOutput.AddPage(zDoc2.Pages[nDocIdx]);
+                nDocIdx++;
+            }
+
+            // swap in doc2 as doc1 (if needed) and flush the rest of the pages
+            if (nDocIdx >= zDoc1.PageCount)
+            {
+                zDoc1 = zDoc2;
+            }
+            while (nDocIdx < zDoc1.PageCount)
+            {
+                zDocOutput.AddPage(zDoc1.Pages[nDocIdx]);
+                nDocIdx++;
+            }
+            zDocOutput.Save(sOutFile);
+        }
+    }
+}

PdfConstruct/PdfConstruct.csproj

@@ -51,6 +51,7 @@
   <ItemGroup>
     <Compile Include="DataObjects\CardEntry.cs" />
     <Compile Include="DataObjects\Construct.cs" />
+    <Compile Include="Merge\PDFMerge.cs" />
     <Compile Include="PdfConstructForm.cs">
       <SubType>Form</SubType>
     </Compile>