968706: Move and reorder bookmark in the PDF document.

Bookmarks/Move-and-reorder-bookmark-in-the-PDF/.NET/Move-and-reorder-bookmark-in-the-PDF.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36221.1 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Move-and-reorder-bookmark-in-the-PDF", "Move-and-reorder-bookmark-in-the-PDF\Move-and-reorder-bookmark-in-the-PDF.csproj", "{2D864F6D-C55F-4995-9871-B322FAFA3B30}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{2D864F6D-C55F-4995-9871-B322FAFA3B30}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2D864F6D-C55F-4995-9871-B322FAFA3B30}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2D864F6D-C55F-4995-9871-B322FAFA3B30}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2D864F6D-C55F-4995-9871-B322FAFA3B30}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {77EDC987-03C1-47D2-AD47-61625B9D80FC}
+	EndGlobalSection
+EndGlobal

Bookmarks/Move-and-reorder-bookmark-in-the-PDF/.NET/Move-and-reorder-bookmark-in-the-PDF/Move-and-reorder-bookmark-in-the-PDF.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Move_and_reorder_bookmark_in_the_PDF</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.Pdf.Net.Core" Version="*" />
+  </ItemGroup>
+
+</Project>

Bookmarks/Move-and-reorder-bookmark-in-the-PDF/.NET/Move-and-reorder-bookmark-in-the-PDF/Program.cs

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+using Syncfusion.Drawing;
+using Syncfusion.Pdf;
+using Syncfusion.Pdf.Interactive;
+using Syncfusion.Pdf.Parsing;
+class Program
+{
+    static void Main(string[] args)
+    {
+        // Load the PDF document from disk.
+        using (FileStream docStream = new FileStream(Path.GetFullPath(@"Data/Input.pdf"), FileMode.Open, FileAccess.Read))
+        {
+            // Load the PDF document into memory.
+            PdfLoadedDocument loadedDocument = new PdfLoadedDocument(docStream);
+
+            // Access the root bookmark collection of the document.
+            PdfBookmarkBase bookmarks = loadedDocument.Bookmarks;
+
+            // Move a bookmark from index 2 to index 0 (reorder).
+            MoveBookmark(bookmarks, 2, 0, loadedDocument);
+
+            // Remove a bookmark by its title (removes the first match found in hierarchy).
+            RemoveBookmarkByTitle(bookmarks, "Bookmark To Remove");
+
+            //Create file stream.
+            using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"Output/Output.pdf"), FileMode.Create, FileAccess.ReadWrite))
+            {
+                loadedDocument.Save(outputFileStream);
+            }
+
+            loadedDocument.Close(true);
+        }
+    }
+
+    // Moves a bookmark from one index to another within its parent collection.
+    static void MoveBookmark(PdfBookmarkBase parentCollection, int fromIndex, int toIndex, PdfLoadedDocument document)
+    {
+        if (fromIndex == toIndex) return; // No move required if indices are the same.
+
+        // Safely cast the bookmark to be moved.
+        PdfLoadedBookmark bookmarkToMove = parentCollection[fromIndex] as PdfLoadedBookmark;
+        if (bookmarkToMove == null) return;
+
+        // Remove the bookmark from its original location.
+        parentCollection.RemoveAt(fromIndex);
+
+        // Remove any existing bookmark with the same title at the new location to avoid duplicates.
+        RemoveBookmarkByTitle(parentCollection, bookmarkToMove.Title);
+
+        // Insert the bookmark at the new index.
+        PdfBookmark newBookmark = parentCollection.Insert(toIndex, bookmarkToMove.Title);
+        newBookmark.TextStyle = bookmarkToMove.TextStyle;
+        newBookmark.Color = bookmarkToMove.Color;
+
+        // Set the destination (page location/zoom) for the moved bookmark.
+        newBookmark.Destination = bookmarkToMove.Destination ?? new PdfDestination(document.Pages[0])
+        {
+            Location = bookmarkToMove.Destination?.Location ?? new PointF(0, 0),
+            Zoom = bookmarkToMove.Destination?.Zoom ?? 1F
+        };
+
+        // Move all child bookmarks recursively.
+        foreach (PdfBookmark child in bookmarkToMove)
+        {
+            AddBookmark(newBookmark, child, document);
+        }
+    }
+
+    // Clones an existing bookmark (including all descendants) and adds it to a parent.
+    static void AddBookmark(PdfBookmark parent, PdfBookmark bookmark, PdfLoadedDocument document)
+    {
+        // Remove any even-closer duplicate title children before insertion.
+        RemoveBookmarkByTitle(parent, bookmark.Title);
+
+        PdfBookmark newChild = parent.Insert(parent.Count, bookmark.Title);
+        newChild.Destination = bookmark.Destination ?? new PdfDestination(document.Pages[0])
+        {
+            Location = new PointF(0, 0),
+            Zoom = 1F
+        };
+        newChild.TextStyle = bookmark.TextStyle;
+        newChild.Color = bookmark.Color;
+
+        // Recursively clone and add children.
+        foreach (PdfBookmark child in bookmark)
+        {
+            AddBookmark(newChild, child, document);
+        }
+    }
+
+    // Removes the first occurrence of a bookmark with the specified title from a parent (searches recursively).
+    static void RemoveBookmarkByTitle(PdfBookmarkBase parent, string title)
+    {
+        for (int i = 0; i < parent.Count;)
+        {
+            if (parent[i].Title == title)
+            {
+                parent.RemoveAt(i);
+                continue;
+            }
+            if (parent[i] is PdfBookmark child)
+            {
+                RemoveBookmarkByTitle(child, title); // Recurse for children
+            }
+            i++;
+        }
+    }
+}