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TokenControlReplacer.cs
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TokenControlReplacer.cs
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// ***********************************************************************
// Assembly : ControlReplacer
// Author : Jonathan Sheely
// Created : 02-17-2014
//
// Last Modified By : Jonathan Sheely
// Last Modified On : 02-17-2014
// ***********************************************************************
// <copyright file="ControlReplacer.cs" company="InspectorIT">
// Copyright (c) 2014. All rights reserved.
// </copyright>
// <summary>Class library to take a string input with tokens and replace with LiteralControls and UserControls</summary>
// ***********************************************************************
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml;
namespace InspectorIT
{
/// <summary>
/// Class Token.
/// </summary>
internal class Token
{
/// <summary>
/// Initializes a new instance of the <see cref="Token"/> class.
/// </summary>
public Token()
{
UniqueId = Guid.NewGuid().ToString().Replace("-", "");
Attributes = new Dictionary<string, string>();
}
/// <summary>
/// Gets or sets the unique identifier.
/// </summary>
/// <value>The unique identifier.</value>
private string UniqueId { get; set; }
/// <summary>
/// Gets the identifier.
/// </summary>
/// <value>The identifier.</value>
public string Id
{
get { return TokenName + "_" + UniqueId; }
}
/// <summary>
/// Gets or sets the start.
/// </summary>
/// <value>The start.</value>
public int Start { get; set; }
/// <summary>
/// Gets or sets the end.
/// </summary>
/// <value>The end.</value>
public int End { get; set; }
/// <summary>
/// Gets or sets the name of the token.
/// </summary>
/// <value>The name of the token.</value>
public string TokenName { get; set; }
/// <summary>
/// Gets or sets the attributes.
/// </summary>
/// <value>The attributes.</value>
public Dictionary<string, string> Attributes { get; set; }
}
/// <summary>
/// Class ControlReplacerSnippet.
/// </summary>
internal class TokenControlReplacerSnippet
{
/// <summary>
/// Initializes a new instance of the <see cref="TokenControlReplacerSnippet"/> class.
/// </summary>
public TokenControlReplacerSnippet()
{
Tokens = new List<Token>();
Controls = new Control();
}
/// <summary>
/// Gets or sets the original text.
/// </summary>
/// <value>The original text.</value>
public string OriginalText { get; set; }
/// <summary>
/// Gets or sets the tokens.
/// </summary>
/// <value>The tokens.</value>
public List<Token> Tokens { get; set; }
/// <summary>
/// Gets or sets the controls.
/// </summary>
/// <value>The controls.</value>
public Control Controls { get; set; }
}
/// <summary>
/// Class ControlReplacer.
/// </summary>
public class TokenControlReplacer
{
/// <summary>
/// The token close
/// </summary>
private readonly string TokenClose;
/// <summary>
/// The token open
/// </summary>
private readonly string TokenOpen;
/// <summary>
/// Initializes a new instance of the <see cref="TokenControlReplacer"/> class.
/// </summary>
/// <param name="tokenOpen">The token open.</param>
/// <param name="tokenClose">The token close.</param>
public TokenControlReplacer(string tokenOpen, string tokenClose)
{
TokenOpen = tokenOpen;
TokenClose = tokenClose;
Snippets = new List<TokenControlReplacerSnippet>();
}
/// <summary>
/// Gets or sets the snippets.
/// </summary>
/// <value>The snippets.</value>
private List<TokenControlReplacerSnippet> Snippets { get; set; }
/// <summary>
/// Appends the specified text.
/// </summary>
/// <param name="text">The text.</param>
public void Append(string text)
{
if (text != "")
{
var snippet = new TokenControlReplacerSnippet();
snippet.OriginalText = text;
ExtractTokens(snippet);
for (int i = 0; i < snippet.Tokens.Count; i++)
{
Token token = snippet.Tokens[i];
if (i == 0)
{
snippet.Controls.Controls.Add(new LiteralControl(text.Substring(0, token.Start)));
}
else
{
snippet.Controls.Controls.Add(
new LiteralControl(text.Substring(snippet.Tokens[i - 1].End,
token.Start - snippet.Tokens[i - 1].End)));
}
snippet.Controls.Controls.Add(new PlaceHolder {ID = token.Id});
}
snippet.Controls.Controls.Add(
new LiteralControl(text.Substring(snippet.Tokens[snippet.Tokens.Count - 1].End)));
Snippets.Add(snippet);
}
}
/// <summary>
/// Extracts the tokens.
/// </summary>
/// <param name="snippet">The snippet.</param>
/// <exception cref="System.ArgumentException"></exception>
private void ExtractTokens(TokenControlReplacerSnippet snippet)
{
int last = 0;
while (last < snippet.OriginalText.Length)
{
// Find next token position in snippet.Text:
int start = snippet.OriginalText.IndexOf(TokenOpen, last, StringComparison.InvariantCultureIgnoreCase);
if (start == -1)
return;
int end = snippet.OriginalText.IndexOf(TokenClose, start + TokenOpen.Length,
StringComparison.InvariantCultureIgnoreCase);
if (end == -1)
throw new ArgumentException(string.Format("Token is opened but not closed in text \"{0}\".",
snippet.OriginalText));
int eol = snippet.OriginalText.IndexOf('\n', start + TokenOpen.Length);
if (eol != -1 && eol < end)
{
last = eol + 1;
continue;
}
// Take the token from snippet.Text:
end += TokenClose.Length;
string token =
snippet.OriginalText.Substring(start, end - start).Replace(TokenOpen, "").Replace(TokenClose, "");
var objToken = new Token
{
Start = start,
End = end,
TokenName = token
};
if (token.Contains(":"))
{
string[] nameAndAttributes = token.Split(':');
objToken.TokenName = nameAndAttributes[0];
var xml = new XmlDocument();
string xmlText = @"<root " + nameAndAttributes[1] + " />";
xml.LoadXml(xmlText);
if (xml.DocumentElement.Attributes != null)
foreach (XmlAttribute attribute in xml.DocumentElement.Attributes)
{
objToken.Attributes.Add(attribute.Name, attribute.Value);
}
}
snippet.Tokens.Add(objToken);
last = end;
}
}
/// <summary>
/// Replaces the specified token.
/// </summary>
/// <param name="token">The token.</param>
/// <param name="text">The text.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
public bool Replace(string token, string text)
{
return Replace(token, new LiteralControl(text));
}
/// <summary>
/// Replaces the specified token.
/// </summary>
/// <param name="token">The token.</param>
/// <param name="control">The control.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
public bool Replace(string token, Control control)
{
var tokenFound = false;
if (token.Contains(TokenOpen) || token.Contains(TokenClose))
{
token = token.Replace(TokenOpen, "").Replace(TokenClose, "");
}
foreach (TokenControlReplacerSnippet snippet in Snippets)
{
IEnumerable<Token> snippetsWithToken = snippet.Tokens.Where(x => x.TokenName == token);
if (snippetsWithToken.Any())
{
tokenFound = true;
foreach (Token objToken in snippetsWithToken)
{
snippet.Controls.Controls.OfType<PlaceHolder>()
.FirstOrDefault(x => x.ID == objToken.Id)
.Controls.Clear();
if (objToken.Attributes.Count > 0)
{
foreach (var attribute in objToken.Attributes)
{
PropertyInfo property = control.GetType().GetProperty(attribute.Key);
if (property == null)
{
property = control.GetType().GetProperty("Attributes");
((AttributeCollection)property.GetValue(control, null)).Add(attribute.Key, attribute.Value);
}
else
{
property.SetValue(control, attribute.Value, null);
}
}
}
snippet.Controls.Controls.OfType<PlaceHolder>()
.FirstOrDefault(x => x.ID == objToken.Id)
.Controls.Add(control);
}
}
}
return tokenFound;
}
/// <summary>
/// Outputs this instance.
/// </summary>
/// <returns>Control.</returns>
public Control Output()
{
var masterCtl = new Control();
foreach (TokenControlReplacerSnippet snippet in Snippets)
{
masterCtl.Controls.Add(snippet.Controls);
}
return masterCtl;
}
}
}