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164
omegapro/PowerTools/Classes/PictureAccessor.cs
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164
omegapro/PowerTools/Classes/PictureAccessor.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.Collections.Generic;
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using System.Drawing;
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using System.IO;
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using System.Xml;
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using System.Xml.Linq;
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using System.Xml.XPath;
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using DocumentFormat.OpenXml.Packaging;
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using System;
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using System.Drawing.Imaging;
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namespace OpenXmlPowerTools
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{
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/// <summary>
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/// Provides access to picture operations
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/// </summary>
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public class PictureAccessor
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{
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private static XNamespace mainns;
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private static XNamespace wordprocessingDrawingns;
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private static XNamespace drawingmlMainns;
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private static XNamespace picturens;
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private static XNamespace relationshipns;
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private const int pixelsPerEmu = 9525;
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static PictureAccessor() {
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mainns = "http://schemas.openxmlformats.org/wordprocessingml/2006/main";
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wordprocessingDrawingns = "http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing";
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drawingmlMainns = "http://schemas.openxmlformats.org/drawingml/2006/main";
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picturens = "http://schemas.openxmlformats.org/drawingml/2006/picture";
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relationshipns = "http://schemas.openxmlformats.org/officeDocument/2006/relationships";
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}
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public static OpenXmlPowerToolsDocument Insert(WmlDocument doc, string xpathInsertionPoint, Image pictureToInsert, string name)
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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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XDocument xmlMainDocument = document.MainDocumentPart.GetXDocument();
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ImagePart picturePart = null;
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XmlNamespaceManager namespaceManager = new XmlNamespaceManager(new NameTable());
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namespaceManager.AddNamespace("w", mainns.NamespaceName);
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IEnumerable<XElement> insertionPoints = xmlMainDocument.XPathSelectElements(xpathInsertionPoint, namespaceManager);
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//make the insertion for each insertion point specified in the xpath query
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foreach (XElement insertionPoint in insertionPoints)
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{
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if (picturePart == null)
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{
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// Create the picture part in the package
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picturePart = document.MainDocumentPart.AddImagePart(GetImagePartType(pictureToInsert.RawFormat));
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}
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// the pictures in the main document part goes in a very long xml, wich specifies the way the picture
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// has to be placed using drawingXml.
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insertionPoint.AddAfterSelf(
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new XElement(mainns + "p",
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new XElement(mainns + "r",
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new XElement(mainns + "drawing",
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new XElement(wordprocessingDrawingns + "inline",
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new XElement(wordprocessingDrawingns + "extent",
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new XAttribute("cx", pictureToInsert.Width * pixelsPerEmu),
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new XAttribute("cy", pictureToInsert.Height * pixelsPerEmu)
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),
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new XElement(wordprocessingDrawingns + "docPr",
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new XAttribute("name", name),
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new XAttribute("id", "1")
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),
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new XElement(drawingmlMainns + "graphic",
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new XAttribute(XNamespace.Xmlns + "a", drawingmlMainns.NamespaceName),
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new XElement(drawingmlMainns + "graphicData",
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new XAttribute("uri", picturens.NamespaceName),
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new XElement(picturens + "pic",
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new XAttribute(XNamespace.Xmlns + "pic", picturens.NamespaceName),
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new XElement(picturens + "nvPicPr",
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new XElement(picturens + "cNvPr",
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new XAttribute("id", "0"),
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new XAttribute("name", name)
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),
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new XElement(picturens + "cNvPicPr")
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),
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new XElement(picturens + "blipFill",
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new XElement(drawingmlMainns + "blip",
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new XAttribute(relationshipns + "embed", document.MainDocumentPart.GetIdOfPart(picturePart))
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),
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new XElement(drawingmlMainns + "stretch",
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new XElement(drawingmlMainns + "fillRect")
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)
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),
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new XElement(picturens + "spPr",
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new XElement(drawingmlMainns + "xfrm",
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new XElement(drawingmlMainns + "off",
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new XAttribute("x", "0"),
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new XAttribute("y", "0")
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),
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new XElement(drawingmlMainns + "ext",
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new XAttribute("cx", pictureToInsert.Width * pixelsPerEmu),
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new XAttribute("cy", pictureToInsert.Height * pixelsPerEmu)
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)
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),
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new XElement(drawingmlMainns + "prstGeom",
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new XAttribute("prst", "rect")
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)
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)
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)
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)
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)
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)
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)
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)
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)
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);
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}
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if (picturePart != null)
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{
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Stream partStream = picturePart.GetStream(FileMode.Create, FileAccess.ReadWrite);
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pictureToInsert.Save(partStream, pictureToInsert.RawFormat);
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}
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else
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throw new ArgumentException("The xpath query did not return a valid location.");
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document.MainDocumentPart.PutXDocument();
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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="format">Content mimetype</param>
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/// <returns>Image type</returns>
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private static ImagePartType GetImagePartType(ImageFormat format)
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{
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if (format.Equals(ImageFormat.Jpeg))
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return ImagePartType.Jpeg;
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else if (format.Equals(ImageFormat.Emf))
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return ImagePartType.Emf;
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else if (format.Equals(ImageFormat.Gif))
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return ImagePartType.Gif;
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else if (format.Equals(ImageFormat.Icon))
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return ImagePartType.Icon;
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else if (format.Equals(ImageFormat.Png))
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return ImagePartType.Png;
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else if (format.Equals(ImageFormat.Tiff))
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return ImagePartType.Tiff;
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else if (format.Equals(ImageFormat.Wmf))
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return ImagePartType.Wmf;
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else
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return ImagePartType.Bmp;
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}
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}
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}
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