javascriptutil.cs

来自「AJAX开发工具包」· CS 代码 · 共 145 行

/*
 * MS	06-04-04	fixed GetEnumRepresentation if type.FullName has no "."
 * MS	06-04-12	fixed \0 return value for QuoteString, will be simply removed from the string
 * 
 * 
 */
using System;
using System.Xml;
using System.Text;

namespace AjaxPro
{
	/// <summary>
	/// Provides helper methods for JavaScript.
	/// </summary>
	public sealed class JavaScriptUtil
	{
		/// <summary>
		/// Quote the fiven string to be used in JSON.
		/// </summary>
		/// <param name="s">The string to quote.</param>
		/// <returns>Returns the quoted string.</returns>
		public static string QuoteString(string s)
		{
			if(s != null)
				return s.Replace("\0", "").Replace("\\", "\\\\").Replace("\t", "\\t").Replace("\r", "\\r").Replace("\n", "\\n").Replace("\"", "\\\"");

			return s;
		}

		/// <summary>
		/// Converts a enum type to a JavaScript representation.
		/// </summary>
		/// <param name="type">The type of the enum.</param>
		/// <returns>Returns a JavaScript that will add a local variable to the page.</returns>
		public static string GetEnumRepresentation(Type type)
		{
			if(type.IsEnum == false)
				return "";

			StringBuilder sb = new StringBuilder();

			AjaxNamespaceAttribute[] ema = (AjaxNamespaceAttribute[])type.GetCustomAttributes(typeof(AjaxNamespaceAttribute), true);
			
			if(ema.Length > 0 && ema[0].ClientNamespace.Replace(".", "").Length > 0)
			{
				sb.Append("addNamespace(\"" + ema[0].ClientNamespace + "\");\r\n");
				sb.Append(ema[0].ClientNamespace + ".");
				sb.Append(type.Name);
			}
			else
			{
				sb.Append("addNamespace(\"" + (type.FullName.IndexOf(".") > 0 ? type.FullName.Substring(0, type.FullName.LastIndexOf(".")) : type.FullName) + "\");\r\n");
				sb.Append(type.FullName);
			}
			sb.Append(" = {\r\n");

			string[] names = Enum.GetNames(type);

			int c=0;
			foreach(int i in Enum.GetValues(type))
			{
				sb.Append("\t\"");
				sb.Append(names[c]);
				sb.Append("\":");
				sb.Append(i);

				if(c < names.Length -1)
					sb.Append(",\r\n");

				c++;
			}

			sb.Append("\r\n}\r\n");

			return sb.ToString();
		}

		/// <summary>
		/// Converts an IJavaScriptObject to an XML document.
		/// </summary>
		/// <param name="o">The IJavaScript object to convert.</param>
		/// <returns>Returns an XML document.</returns>
		public static XmlDocument ConvertIJavaScriptObjectToXml(IJavaScriptObject o)
		{
			XmlDocument doc = new XmlDocument();
			doc.LoadXml("<root/>");

			AddIJavaScriptObject(doc.DocumentElement, o);

			return doc;
		}

		internal static void AddIJavaScriptObject(XmlElement n, IJavaScriptObject o)
		{
			if(o is JavaScriptArray)
			{
				XmlElement p = n.OwnerDocument.CreateElement("array");

				foreach(IJavaScriptObject a in (JavaScriptArray)o)
					AddIJavaScriptObject(p, a);

				n.AppendChild(p);
			}
			else if(o is JavaScriptBoolean)
			{
				XmlElement p = n.OwnerDocument.CreateElement("boolean");
				p.InnerText = o.Value;

				n.AppendChild(p);
			}
			else if(o is JavaScriptNumber)
			{
				XmlElement p = n.OwnerDocument.CreateElement("number");
				p.InnerText = o.Value;

				n.AppendChild(p);
			}
			else if(o is JavaScriptString)
			{
				XmlElement p = n.OwnerDocument.CreateElement("string");
				p.InnerText = o.Value;

				n.AppendChild(p);
			}
			else if(o is JavaScriptObject)
			{
				XmlElement p = n.OwnerDocument.CreateElement("object");

				foreach(string key in ((JavaScriptObject)o).Keys)
				{
					XmlElement e = n.OwnerDocument.CreateElement("property");
					e.SetAttribute("name", key);

					p.AppendChild(e);

					AddIJavaScriptObject(e, (IJavaScriptObject)((JavaScriptObject)o)[key]);
				}

				n.AppendChild(p);
			}
		}
	}
}