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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (c) Microsoft Corporation. All rights reserved
//
//
// Abstract:
//
// This file contains helper methods that provide a data-binding friendly way to access and parse bidi response data.
using System;
using System.Collections.Generic;
using System.Windows.Media;
using System.Xml;
namespace Microsoft.Samples.Printing.PrinterExtension.Helpers
{
/// <summary>
/// Provide a data-binding friendly way to access and parse bidi response data.
/// </summary>
public class BidiHelper
{
/// <summary>
/// Parse the bidi response.
/// </summary>
/// <param name="bidiResponse">Bidi response XML data.</param>
public BidiHelper(string bidiResponse)
{
BidiResponseParser parser = new BidiResponseParser(bidiResponse);
InkLevelC = parser.GetInkLevel(Colors.Cyan);
InkLevelM = parser.GetInkLevel(Colors.Magenta);
InkLevelY = parser.GetInkLevel(Colors.Yellow);
InkLevelK = parser.GetInkLevel(Colors.Black);
}
/// <summary>
/// Get the Cyan ink level.
/// </summary>
public double InkLevelC
{
get;
private set;
}
/// <summary>
/// Get the Magenta ink level.
/// </summary>
public double InkLevelM
{
get;
private set;
}
/// <summary>
/// Get the Yellow ink level.
/// </summary>
public double InkLevelY
{
get;
private set;
}
/// <summary>
/// Get the Black ink level.
/// </summary>
public double InkLevelK
{
get;
private set;
}
}
/// <summary>
/// This class parses bidi response xml data and provides wrapper methods that operate upon the xml.
/// </summary>
internal class BidiResponseParser
{
/// <summary>
/// Parse the bidi response.
/// </summary>
/// <param name="bidiResponse">Bidi response XML data.</param>
internal BidiResponseParser(string bidiResponse)
{
bidiData = new XmlDocument();
bidiData.LoadXml(bidiResponse);
namespaceManager = new XmlNamespaceManager(bidiData.NameTable);
namespaceManager.AddNamespace("bidi", "http://schemas.microsoft.com/windows/2005/03/printing/bidi");
}
/// <summary>
/// Get the ink level for a given color.
/// </summary>
/// <param name="color">Color</param>
/// <returns>Ink level percentage</returns>
internal double GetInkLevel(Color color)
{
XmlElement root = bidiData.DocumentElement;
XmlNode inkNode = root.SelectSingleNode(CreateInkXPathQuery(color), namespaceManager);
return double.Parse(inkNode.FirstChild.Value) / 100;
}
/// <summary>
/// Create an XPath query that retrieves the ink level from a standard bidi response.
/// </summary>
/// <param name="color"></param>
/// <returns></returns>
private static string CreateInkXPathQuery(Color color)
{
string colorName = null;
if (color.Equals(Colors.Black))
{
colorName = "Black";
}
else if (color.Equals(Colors.Red))
{
colorName = "Red";
}
else if (color.Equals(Colors.Green))
{
colorName = "Green";
}
else if (color.Equals(Colors.Blue))
{
colorName = "Blue";
}
else if (color.Equals(Colors.Cyan))
{
colorName = "Cyan";
}
else if (color.Equals(Colors.Magenta))
{
colorName = "Magenta";
}
else if (color.Equals(Colors.Yellow))
{
colorName = "Yellow";
}
else
{
throw new ArgumentException("Unsupported color");
}
return "/bidi:Get/Query/Schema[@name='\\Printer.Consumables." + colorName + "Ink" + ":Level']/BIDI_INT";
}
private XmlDocument bidiData;
private XmlNamespaceManager namespaceManager;
}
}
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