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214
omegapro/PowerTools/Classes/ThemeAccessor.cs
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214
omegapro/PowerTools/Classes/ThemeAccessor.cs
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/***************************************************************************
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Copyright (c) Microsoft Corporation 2011.
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This code is licensed using the Microsoft Public License (Ms-PL). The text of the license can be found here:
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http://www.microsoft.com/resources/sharedsource/licensingbasics/publiclicense.mspx
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***************************************************************************/
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using System.IO;
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using System.Linq;
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using System.Xml.Linq;
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using DocumentFormat.OpenXml.Packaging;
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using System.IO.Packaging;
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using System;
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using System.Xml;
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namespace OpenXmlPowerTools
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{
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/// <summary>
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/// Provides access to theme operations
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/// </summary>
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public class ThemeAccessor
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{
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private static XNamespace ns;
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private static XNamespace drawingns;
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private static XNamespace relationshipns;
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private static string mainDocumentRelationshipType;
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private static string themeRelationshipType;
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static ThemeAccessor()
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{
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ns = "http://schemas.openxmlformats.org/wordprocessingml/2006/main";
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drawingns = "http://schemas.openxmlformats.org/drawingml/2006/main";
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relationshipns = "http://schemas.openxmlformats.org/officeDocument/2006/relationships";
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mainDocumentRelationshipType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument";
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themeRelationshipType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme";
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}
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/// <summary>
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/// Gets the document theme
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/// </summary>
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public static OpenXmlPowerToolsDocument GetTheme(WmlDocument doc)
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{
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using (OpenXmlMemoryStreamDocument sourceStreamDoc = new OpenXmlMemoryStreamDocument(doc))
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using (WordprocessingDocument document = sourceStreamDoc.GetWordprocessingDocument())
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{
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// Loads the theme part main file
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ThemePart theme = document.MainDocumentPart.ThemePart;
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if (theme != null)
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{
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XDocument themeDocument = theme.GetXDocument();
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// Creates the theme package (thmx file)
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using (OpenXmlMemoryStreamDocument streamDoc = OpenXmlMemoryStreamDocument.CreatePackage())
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{
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using (Package themePackage = streamDoc.GetPackage())
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{
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// Creates the theme manager part on the new package and loads default content
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PackagePart newThemeManagerPart = themePackage.CreatePart(new Uri("/theme/theme/themeManager.xml", UriKind.RelativeOrAbsolute), "application/vnd.openxmlformats-officedocument.themeManager+xml");
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themePackage.CreateRelationship(newThemeManagerPart.Uri, TargetMode.Internal, "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument");
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using (XmlWriter xWriter = XmlWriter.Create(newThemeManagerPart.GetStream(FileMode.Create, FileAccess.Write)))
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{
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CreateEmptyThemeManager().WriteTo(xWriter);
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xWriter.Flush();
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}
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// Creates the main theme part
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PackagePart newThemePart = themePackage.CreatePart(new Uri("/theme/theme/" + theme.Uri.OriginalString.Substring(theme.Uri.OriginalString.LastIndexOf('/') + 1), UriKind.RelativeOrAbsolute), theme.ContentType);
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newThemeManagerPart.CreateRelationship(newThemePart.Uri, TargetMode.Internal, theme.RelationshipType);
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// Gets embeded part references
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var embeddedItems =
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themeDocument
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.Descendants()
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.Attributes(relationshipns + "embed");
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foreach (IdPartPair partId in theme.Parts)
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{
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OpenXmlPart part = partId.OpenXmlPart;
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// Creates the new media part inside the destination package
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PackagePart newPart = themePackage.CreatePart(new Uri("/theme/media/" + part.Uri.OriginalString.Substring(part.Uri.OriginalString.LastIndexOf('/') + 1), UriKind.RelativeOrAbsolute), part.ContentType);
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PackageRelationship relationship =
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newThemePart.CreateRelationship(newPart.Uri, TargetMode.Internal, part.RelationshipType);
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// Copies binary content from original part to destination part
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Stream partStream = part.GetStream(FileMode.Open, FileAccess.Read);
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Stream newPartStream = newPart.GetStream(FileMode.Create, FileAccess.Write);
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byte[] fileContent = new byte[partStream.Length];
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partStream.Read(fileContent, 0, (int)partStream.Length);
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newPartStream.Write(fileContent, 0, (int)partStream.Length);
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newPartStream.Flush();
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// Replaces old embed part reference with the freshly created one
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XAttribute relationshipAttribute = embeddedItems.FirstOrDefault(e => e.Value == theme.GetIdOfPart(part));
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if (relationshipAttribute != null)
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relationshipAttribute.Value = relationship.Id;
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}
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// Writes the updated theme XDocument into the destination package
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using (XmlWriter newThemeWriter = XmlWriter.Create(newThemePart.GetStream(FileMode.Create, FileAccess.Write)))
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themeDocument.WriteTo(newThemeWriter);
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}
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return streamDoc.GetModifiedDocument();
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}
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}
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return null;
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}
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}
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/// <summary>
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/// Creates an empty theme manager document
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/// </summary>
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private static XDocument CreateEmptyThemeManager() {
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return new XDocument(
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new XElement(drawingns+"themeManager",
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new XAttribute(XNamespace.Xmlns + "a", drawingns)
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)
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);
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}
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/// <summary>
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/// Sets the document theme
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/// </summary>
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/// <param name="theme">Theme package</param>
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public static OpenXmlPowerToolsDocument SetTheme(WmlDocument doc, OpenXmlPowerToolsDocument themeDoc)
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{
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using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
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{
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using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
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{
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using (OpenXmlMemoryStreamDocument themeStream = new OpenXmlMemoryStreamDocument(themeDoc))
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using (Package theme = themeStream.GetPackage())
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{
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// Gets the theme manager part
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PackageRelationship themeManagerRelationship =
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theme.GetRelationshipsByType(mainDocumentRelationshipType).FirstOrDefault();
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if (themeManagerRelationship != null)
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{
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PackagePart themeManagerPart = theme.GetPart(themeManagerRelationship.TargetUri);
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// Gets the theme main part
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PackageRelationship themeRelationship =
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themeManagerPart.GetRelationshipsByType(themeRelationshipType).FirstOrDefault();
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if (themeRelationship != null)
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{
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PackagePart themePart = theme.GetPart(themeRelationship.TargetUri);
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XDocument newThemeDocument = XDocument.Load(XmlReader.Create(themePart.GetStream(FileMode.Open, FileAccess.Read)));
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// Removes existing theme part from document
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if (document.MainDocumentPart.ThemePart != null)
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document.MainDocumentPart.DeletePart(document.MainDocumentPart.ThemePart);
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// Creates a new theme part
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ThemePart documentThemePart = document.MainDocumentPart.AddNewPart<ThemePart>();
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var embeddedItems =
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newThemeDocument
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.Descendants()
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.Attributes(relationshipns + "embed");
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foreach (PackageRelationship imageRelationship in themePart.GetRelationships())
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{
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// Adds an image part to the theme part and stores contents inside
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PackagePart imagePart = theme.GetPart(imageRelationship.TargetUri);
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ImagePart newImagePart =
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documentThemePart.AddImagePart(GetImagePartType(imagePart.ContentType));
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newImagePart.FeedData(imagePart.GetStream(FileMode.Open, FileAccess.Read));
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// Updates relationship references into the theme XDocument
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XAttribute relationshipAttribute = embeddedItems.FirstOrDefault(e => e.Value == imageRelationship.Id);
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if (relationshipAttribute != null)
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relationshipAttribute.Value = documentThemePart.GetIdOfPart(newImagePart);
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}
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documentThemePart.PutXDocument(newThemeDocument);
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}
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}
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}
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}
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return streamDoc.GetModifiedDocument();
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}
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}
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/// <summary>
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/// Gets the image type representation for a mimetype
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/// </summary>
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/// <param name="imageContentType">Content mimetype</param>
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/// <returns>Image type</returns>
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private static ImagePartType GetImagePartType(string imageContentType)
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{
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switch (imageContentType) {
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case "image/jpeg":
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return ImagePartType.Jpeg;
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case "image/emf":
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return ImagePartType.Emf;
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case "image/gif":
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return ImagePartType.Gif;
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case "image/ico":
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return ImagePartType.Icon;
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case "image/pcx":
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return ImagePartType.Pcx;
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case "image/png":
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return ImagePartType.Png;
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case "image/tiff":
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return ImagePartType.Tiff;
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case "image/wmf":
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return ImagePartType.Wmf;
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default:
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return ImagePartType.Bmp;
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}
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}
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}
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}
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