main/src/addins/AspNetAddIn/MonoDevelop.Html/HtmlSchema.cs

   1 //
   2 // HtmlSchema.cs
   3 //
   4 // Author:
   5 //   Michael Hutchinson <mhutchinson@novell.com>
   6 //
   7 // Copyright (C) 2008 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Xml;
  31 using System.Collections.Generic;
  32 using MonoDevelop.XmlEditor.Completion;
  33
  34 namespace MonoDevelop.Html
  35 {
  36
  37         public class HtmlSchema
  38         {
  39                 string docType;
  40                 string name;
  41                 string substituteProvider;
  42                 IXmlCompletionProvider provider;
  43
  44                 public HtmlSchema (string name, string docType, IXmlCompletionProvider provider)
  45                 {
  46                         this.docType = docType;
  47                         this.name = name;
  48                         this.provider = provider;
  49                 }
  50
  51                 public HtmlSchema (string name, string docType, string substituteProvider)
  52                         : this (name, docType, (IXmlCompletionProvider) null)
  53                 {
  54                         this.substituteProvider = string.IsNullOrEmpty (substituteProvider)? null : substituteProvider;
  55                 }
  56
  57                 public string DocType {
  58                         get { return docType; }
  59                 }
  60
  61                 public string Name {
  62                         get { return name; }
  63                 }
  64
  65                 public IXmlCompletionProvider CompletionProvider {
  66                         get {
  67                                 if (substituteProvider != null)
  68                                         ResolveProvider ();
  69                                 return provider;
  70                         }
  71                 }
  72
  73                 void ResolveProvider ()
  74                 {
  75                         try {
  76                                 HtmlSchema hs = HtmlSchemaService.GetSchema (substituteProvider);
  77                                 if (hs != null)
  78                                         provider = hs.CompletionProvider;
  79                         } catch (StackOverflowException) {
  80                                 MonoDevelop.Core.LoggingService.LogWarning (
  81                                     "HTML doctype '{0}' contains a substitute schema reference that is either cyclical or too deep, and hence cannot be resolved.'",
  82                                     name);
  83                         }
  84                         if (provider == null) {
  85                                 provider = new EmptyXmlCompletionProvider ();
  86                                 MonoDevelop.Core.LoggingService.LogWarning (
  87                                     "HTML doctype '{0}' cannot find substitute schema '{1}'", name, substituteProvider);
  88                         }
  89                         substituteProvider = null;
  90                 }
  91         }
  92 }