mcs/class/monodoc/Monodoc/generators/HtmlGenerator.cs

   1 using System;
   2 using System.IO;
   3 using System.Text;
   4 using System.Linq;
   5 using System.Collections.Generic;
   6
   7 using Monodoc;
   8
   9 namespace Monodoc.Generators
  10 {
  11         using Html;
  12
  13         interface IHtmlExporter
  14         {
  15                 string CssCode { get; }
  16                 string Export (Stream input, Dictionary<string, string> extras);
  17                 string Export (string input, Dictionary<string, string> extras);
  18         }
  19
  20         public class HtmlGenerator : IDocGenerator<string>
  21         {
  22                 const string cachePrefix = "htmlcached#";
  23
  24                 static string css_code;
  25
  26                 IDocCache defaultCache;
  27                 static Dictionary<DocumentType, IHtmlExporter> converters;
  28
  29                 static HtmlGenerator ()
  30                 {
  31                         converters = new Dictionary<DocumentType, IHtmlExporter> {
  32                                 { DocumentType.EcmaXml, new Ecma2Html () },
  33                                 { DocumentType.Man, new Man2Html () },
  34                                 { DocumentType.TocXml, new Toc2Html () },
  35                                 { DocumentType.EcmaSpecXml, new Ecmaspec2Html () },
  36                                 { DocumentType.ErrorXml, new Error2Html () },
  37                                 { DocumentType.Html, new Idem () },
  38                                 { DocumentType.MonoBook, new MonoBook2Html () },
  39                                 { DocumentType.AddinXml, new Addin2Html () },
  40                                 { DocumentType.PlainText, new Idem () },
  41                         };
  42                 }
  43
  44                 public HtmlGenerator (IDocCache defaultCache)
  45                 {
  46                         this.defaultCache = defaultCache;
  47                 }
  48
  49                 public string Generate (HelpSource hs, string id)
  50                 {
  51                         if (hs == null || string.IsNullOrEmpty (id))
  52                                 return MakeHtmlError (string.Format ("Your request has found no candidate provider [hs=\"{0}\", id=\"{1}\"]",
  53                                                                      hs == null ? "(null)" : hs.Name, id ?? "(null)"));
  54                         var cache = defaultCache ?? hs.Cache;
  55                         if (cache != null && cache.IsCached (MakeCacheKey (hs, id, null)))
  56                                 return cache.GetCachedString (MakeCacheKey (hs, id, null));
  57
  58                         IEnumerable<string> parts;
  59                         if (hs.IsMultiPart (id, out parts))
  60                                 return GenerateMultiPart (hs, parts, id);
  61
  62                         if (hs.IsRawContent (id))
  63                                 return hs.GetText (id) ?? string.Empty;
  64
  65                         Dictionary<string, string> extraParams = null;
  66                         DocumentType type = hs.GetDocumentTypeForId (id, out extraParams);
  67                         if (cache != null && extraParams != null && cache.IsCached (MakeCacheKey (hs, id, extraParams)))
  68                                 return cache.GetCachedString (MakeCacheKey (hs, id, extraParams));
  69
  70                         IHtmlExporter exporter;
  71                         if (!converters.TryGetValue (type, out exporter))
  72                                 return MakeHtmlError (string.Format ("Input type '{0}' not supported",
  73                                                                      type.ToString ()));
  74                         var result = hs.IsGeneratedContent (id) ?
  75                                 exporter.Export (hs.GetCachedText (id), extraParams) :
  76                                 exporter.Export (hs.GetCachedHelpStream (id), extraParams);
  77
  78                         if (cache != null)
  79                                 cache.CacheText (MakeCacheKey (hs, id, extraParams), result);
  80                         return result;
  81                 }
  82
  83                 string GenerateMultiPart (HelpSource hs, IEnumerable<string> ids, string originalId)
  84                 {
  85                         var sb = new StringBuilder ();
  86                         foreach (var id in ids)
  87                                 sb.AppendLine (Generate (hs, id));
  88
  89                         var cache = defaultCache ?? hs.Cache;
  90                         if (cache != null)
  91                                 cache.CacheText (MakeCacheKey (hs, originalId, null), sb.ToString ());
  92                         return sb.ToString ();
  93                 }
  94
  95                 public static string InlineCss {
  96                         get {
  97                                 if (css_code != null)
  98                                         return css_code;
  99
 100                                 System.Reflection.Assembly assembly = System.Reflection.Assembly.GetAssembly (typeof (HtmlGenerator));
 101                                 Stream str_css = assembly.GetManifestResourceStream ("base.css");
 102                                 StringBuilder sb = new StringBuilder ((new StreamReader (str_css)).ReadToEnd());
 103                                 sb.Replace ("@@FONT_FAMILY@@", "Sans Serif");
 104                                 sb.Replace ("@@FONT_SIZE@@", "100%");
 105                                 css_code = sb.ToString () + converters.Values
 106                                         .Select (c => c.CssCode)
 107                                         .Where (css => !string.IsNullOrEmpty (css))
 108                                         .DefaultIfEmpty (string.Empty)
 109                                         .Aggregate (string.Concat);
 110                                 return css_code;
 111                         }
 112                         set {
 113                                 css_code = value;
 114                         }
 115                 }
 116
 117                 string MakeHtmlError (string error)
 118                 {
 119                         return string.Format ("<html><head></head><body><p>{0}</p></body></html>", error);
 120                 }
 121
 122                 string MakeCacheKey (HelpSource hs, string page, IDictionary<string,string> extraParams)
 123                 {
 124                         var key = cachePrefix + hs.SourceID + page;
 125                         if (extraParams != null && extraParams.Count > 0) {
 126                                 var paramPart = string.Join ("-", extraParams.Select (kvp => kvp.Key + kvp.Value));
 127                                 key += '_' + paramPart;
 128                         }
 129                         return key;
 130                 }
 131         }
 132 }