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226
omegapro/PowerTools/Classes/BackgroundAccessor.cs
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226
omegapro/PowerTools/Classes/BackgroundAccessor.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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namespace OpenXmlPowerTools
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{
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public partial class WmlDocument : OpenXmlPowerToolsDocument
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{
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public string GetBackgroundColor()
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{
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return BackgroundAccessor.GetBackgroundColor(this);
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}
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public string GetBackgroundImageFileName()
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{
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return BackgroundAccessor.GetImageFileName(this);
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}
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public void SaveBackgroundImageToFile(string fileName)
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{
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BackgroundAccessor.SaveImageToFile(this, fileName);
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}
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public WmlDocument SetBackgroundColor(string colorValue)
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{
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return (WmlDocument)BackgroundAccessor.SetColor(this, colorValue);
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}
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public WmlDocument SetBackgroundImage(string imagePath)
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{
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return (WmlDocument)BackgroundAccessor.SetImage(this, imagePath);
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}
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}
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/// <summary>
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/// Provides access to background operations
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/// </summary>
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public class BackgroundAccessor
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{
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private const string defaultBackgroundColor = "FFFFFF";
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private const string defaultBWMode = "white";
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private const string defaultTargetScreenSize = "800,600";
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private const string defaultVmlBackgroundImageId = "_x0000_s1025";
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private const string defaultImageRecolor = "t";
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private const string defaultImageType = "frame";
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private static XNamespace ns;
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private static XNamespace vmlns;
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private static XNamespace officens;
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private static XNamespace relationshipsns;
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public static string GetBackgroundColor(WmlDocument doc)
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{
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using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
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using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
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{
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XDocument mainDocument = document.MainDocumentPart.GetXDocument();
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XElement backgroundElement = mainDocument.Descendants(W.background).FirstOrDefault();
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return (backgroundElement == null) ? string.Empty : backgroundElement.Attribute(W.color).Value;
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}
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}
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public static string GetImageFileName(WmlDocument doc)
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{
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using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
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using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
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{
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XDocument mainDocument = document.MainDocumentPart.GetXDocument();
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XElement fillElement = mainDocument.Descendants(W.background).Descendants(VML.fill).FirstOrDefault();
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if (fillElement != null)
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{
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string imageRelationshipId = fillElement.Attribute(R.id).Value;
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OpenXmlPart imagePart = document.MainDocumentPart.GetPartById(imageRelationshipId);
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// Gets the image name (path stripped)
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string imagePath = imagePart.Uri.OriginalString;
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return imagePath.Substring(imagePath.LastIndexOf('/') + 1);
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}
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else
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return string.Empty;
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}
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}
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public static void SaveImageToFile(WmlDocument doc, string fileName)
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{
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using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
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using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
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{
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XDocument mainDocument = document.MainDocumentPart.GetXDocument();
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XElement fillElement = mainDocument.Descendants(W.background).Descendants(VML.fill).FirstOrDefault();
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if (fillElement != null)
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{
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string imageRelationshipId = fillElement.Attribute(R.id).Value;
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OpenXmlPart imagePart = document.MainDocumentPart.GetPartById(imageRelationshipId);
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// Gets the image name (path stripped)
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string imagePath = imagePart.Uri.OriginalString;
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// Writes the image outside the package
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OpenXmlPowerToolsDocument.SavePartAs(imagePart, fileName);
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}
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}
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}
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static BackgroundAccessor()
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{
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ns = "http://schemas.openxmlformats.org/wordprocessingml/2006/main";
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vmlns = "urn:schemas-microsoft-com:vml";
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officens = "urn:schemas-microsoft-com:office:office";
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relationshipsns = "http://schemas.openxmlformats.org/officeDocument/2006/relationships";
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}
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/// <summary>
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/// Nodes list with background elements
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/// </summary>
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private static XElement BackgroundElement(WordprocessingDocument document)
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{
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XDocument mainDocument = document.MainDocumentPart.GetXDocument();
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XElement result = mainDocument.Descendants(ns + "background").FirstOrDefault();
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return result;
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}
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/// <summary>
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/// Nodes list with background elements
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/// </summary>
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private static XElement BackgroundFillElement(WordprocessingDocument document)
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{
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XDocument mainDocument = document.MainDocumentPart.GetXDocument();
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XElement result = mainDocument.Descendants(ns + "background").Descendants(vmlns + "fill").FirstOrDefault();
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return result;
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}
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/// <summary>
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/// Sets the document background color
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/// </summary>
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/// <param name="colorValue">String representation of the hexadecimal RGB color</param>
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public static OpenXmlPowerToolsDocument SetColor(WmlDocument doc, string colorValue)
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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 mainDocument = document.MainDocumentPart.GetXDocument();
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// If the background element already exists, deletes it
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XElement backgroundElement = BackgroundElement(document);
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if (backgroundElement != null)
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backgroundElement.Remove();
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mainDocument.Root.AddFirst(
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new XElement(ns + "background",
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new XAttribute(ns + "color", colorValue)
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)
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);
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// Enables background displaying by adding "displayBackgroundShape" tag
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if (SettingAccessor.DisplayBackgroundShapeElements(document) == null)
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SettingAccessor.AddBackgroundShapeElement(document);
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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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/// Sets the document background image
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/// </summary>
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/// <param name="imagePath">Path of the background image</param>
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public static OpenXmlPowerToolsDocument SetImage(WmlDocument doc, string imagePath)
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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 mainDocument = document.MainDocumentPart.GetXDocument();
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// Adds the image to the package
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ImagePart imagePart = document.MainDocumentPart.AddImagePart(ImagePartType.Bmp);
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Stream imageStream = new StreamReader(imagePath).BaseStream;
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byte[] imageBytes = new byte[imageStream.Length];
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imageStream.Read(imageBytes, 0, imageBytes.Length);
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imagePart.GetStream().Write(imageBytes, 0, imageBytes.Length);
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// Creates a "background" element relating the image and the document
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// If the background element already exists, deletes it
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XElement backgroundElement = BackgroundElement(document);
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if (backgroundElement != null)
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backgroundElement.Remove();
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// Background element construction
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mainDocument.Root.Add(
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new XElement(ns + "background",
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new XAttribute(ns + "color", defaultBackgroundColor),
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new XElement(vmlns + "background",
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new XAttribute(vmlns + "id", defaultVmlBackgroundImageId),
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new XAttribute(officens + "bwmode", defaultBWMode),
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new XAttribute(officens + "targetscreensize", defaultTargetScreenSize),
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new XElement(vmlns + "fill",
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new XAttribute(relationshipsns + "id", document.MainDocumentPart.GetIdOfPart(imagePart)),
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new XAttribute("recolor", defaultImageRecolor),
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new XAttribute("type", defaultImageType)
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)
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)
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)
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);
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// Enables background displaying by adding "displayBackgroundShape" tag
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if (SettingAccessor.DisplayBackgroundShapeElements(document) == null)
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SettingAccessor.AddBackgroundShapeElement(document);
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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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}
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}
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