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| /// <summary>
/// Taken from System.Net in 4.0, useful until we move to .NET 4.0 - needed for Client Profile
/// </summary>
public static class WebUtility
{
// Fields
private static char[] _htmlEntityEndingChars = new char[] { ';', '&' };
// Methods
public static string HtmlDecode(string value)
{
if (string.IsNullOrEmpty(value))
{
return value;
}
if (value.IndexOf('&') < 0)
{
return value;
}
StringWriter output = new StringWriter(CultureInfo.InvariantCulture);
HtmlDecode(value, output);
return output.ToString();
}
public static void HtmlDecode(string value, TextWriter output)
{
if (value != null)
{
if (output == null)
{
throw new ArgumentNullException("output");
}
if (value.IndexOf('&') < 0)
{
output.Write(value);
}
else
{
int length = value.Length;
for (int i = 0; i < length; i++)
{
char ch = value[i];
if (ch == '&')
{
int num3 = value.IndexOfAny(_htmlEntityEndingChars, i + 1);
if ((num3 > 0) && (value[num3] == ';'))
{
string entity = value.Substring(i + 1, (num3 - i) - 1);
if ((entity.Length > 1) && (entity[0] == '#'))
{
ushort num4;
if ((entity[1] == 'x') || (entity[1] == 'X'))
{
ushort.TryParse(entity.Substring(2), NumberStyles.AllowHexSpecifier, (IFormatProvider)NumberFormatInfo.InvariantInfo, out num4);
}
else
{
ushort.TryParse(entity.Substring(1), NumberStyles.Integer, (IFormatProvider)NumberFormatInfo.InvariantInfo, out num4);
}
if (num4 != 0)
{
ch = (char)num4;
i = num3;
}
}
else
{
i = num3;
char ch2 = HtmlEntities.Lookup(entity);
if (ch2 != '\0')
{
ch = ch2;
}
else
{
output.Write('&');
output.Write(entity);
output.Write(';');
goto Label_0117;
}
}
}
}
output.Write(ch);
Label_0117: ;
}
}
}
}
public static string HtmlEncode(string value)
{
if (string.IsNullOrEmpty(value))
{
return value;
}
if (IndexOfHtmlEncodingChars(value, 0) == -1)
{
return value;
}
StringWriter output = new StringWriter(CultureInfo.InvariantCulture);
HtmlEncode(value, output);
return output.ToString();
}
public static unsafe void HtmlEncode(string value, TextWriter output)
{
if (value != null)
{
if (output == null)
{
throw new ArgumentNullException("output");
}
int num = IndexOfHtmlEncodingChars(value, 0);
if (num == -1)
{
output.Write(value);
}
else
{
int num2 = value.Length - num;
fixed (char* str = value)
{
char* chPtr = str;
char* chPtr2 = chPtr;
while (num-- > 0)
{
chPtr2++;
output.Write(chPtr2[0]);
}
while (num2-- > 0)
{
chPtr2++;
char ch = chPtr2[0];
if (ch <= '>')
{
switch (ch)
{
case '&':
{
output.Write("&");
continue;
}
case '\'':
{
output.Write("");
continue;
}
case '"':
{
output.Write(""");
continue;
}
case '<':
{
output.Write("<");
continue;
}
case '>':
{
output.Write(">");
continue;
}
}
output.Write(ch);
continue;
}
if ((ch >= '\x00a0') && (ch < 'ā'))
{
output.Write("&#");
output.Write(((int)ch).ToString(NumberFormatInfo.InvariantInfo));
output.Write(';');
}
else
{
output.Write(ch);
}
}
}
}
}
}
private static unsafe int IndexOfHtmlEncodingChars(string s, int startPos)
{
int num = s.Length - startPos;
fixed (char* str = s)
{
char* chPtr = str;
char* chPtr2 = chPtr + startPos;
while (num > 0)
{
char ch = chPtr2[0];
if (ch <= '>')
{
switch (ch)
{
case '&':
case '\'':
case '"':
case '<':
case '>':
return (s.Length - num);
case '=':
goto Label_0086;
}
}
else if ((ch >= '\x00a0') && (ch < 'ā'))
{
return (s.Length - num);
}
Label_0086:
chPtr2++;
num--;
}
}
return -1;
}
// Nested Types
private static class HtmlEntities
{
// Fields
private static string[] _entitiesList = new string[] {
""-quot","&-amp","'-apos","<-lt",">-gt","\x00a0-nbsp","\x00a1-iexcl","\x00a2-cent","\x00a3-pound","\x00a4-curren","\x00a5-yen","\x00a6-brvbar","\x00a7-sect","\x00a8-uml","\x00a9-copy","\x00aa-ordf",
"\x00ab-laquo","\x00ac-not","\x00ad-shy","\x00ae-reg","\x00af-macr","\x00b0-deg","\x00b1-plusmn","\x00b2-sup2","\x00b3-sup3","\x00b4-acute","\x00b5-micro","\x00b6-para","\x00b7-middot","\x00b8-cedil","\x00b9-sup1","\x00ba-ordm",
"\x00bb-raquo","\x00bc-frac14","\x00bd-frac12","\x00be-frac34","\x00bf-iquest","\x00c0-Agrave","\x00c1-Aacute","\x00c2-Acirc","\x00c3-Atilde","\x00c4-Auml","\x00c5-Aring","\x00c6-AElig","\x00c7-Ccedil","\x00c8-Egrave","\x00c9-Eacute","\x00ca-Ecirc",
"\x00cb-Euml","\x00cc-Igrave","\x00cd-Iacute","\x00ce-Icirc","\x00cf-Iuml","\x00d0-ETH","\x00d1-Ntilde","\x00d2-Ograve","\x00d3-Oacute","\x00d4-Ocirc","\x00d5-Otilde","\x00d6-Ouml","\x00d7-times","\x00d8-Oslash","\x00d9-Ugrave","\x00da-Uacute",
"\x00db-Ucirc","\x00dc-Uuml","\x00dd-Yacute","\x00de-THORN","\x00df-szlig","\x00e0-agrave","\x00e1-aacute","\x00e2-acirc","\x00e3-atilde","\x00e4-auml","\x00e5-aring","\x00e6-aelig","\x00e7-ccedil","\x00e8-egrave","\x00e9-eacute","\x00ea-ecirc",
"\x00eb-euml","\x00ec-igrave","\x00ed-iacute","\x00ee-icirc","\x00ef-iuml","\x00f0-eth","\x00f1-ntilde","\x00f2-ograve","\x00f3-oacute","\x00f4-ocirc","\x00f5-otilde","\x00f6-ouml","\x00f7-divide","\x00f8-oslash","\x00f9-ugrave","\x00fa-uacute",
"\x00fb-ucirc","\x00fc-uuml","\x00fd-yacute","\x00fe-thorn","\x00ff-yuml","?-OElig","?-oelig","?-Scaron","?-scaron","?-Yuml","?-fnof","?-circ","?-tilde","Α-Alpha","Β-Beta","Γ-Gamma",
"Δ-Delta","Ε-Epsilon","Ζ-Zeta","Η-Eta","Θ-Theta","Ι-Iota","Κ-Kappa","Λ-Lambda","Μ-Mu","Ν-Nu","Ξ-Xi","Ο-Omicron","Π-Pi","Ρ-Rho","Σ-Sigma","Τ-Tau",
"Υ-Upsilon","Φ-Phi","Χ-Chi","Ψ-Psi","Ω-Omega","α-alpha","β-beta","γ-gamma","δ-delta","ε-epsilon","ζ-zeta","η-eta","θ-theta","ι-iota","κ-kappa","λ-lambda",
"μ-mu","ν-nu","ξ-xi","ο-omicron","π-pi","ρ-rho","?-sigmaf","σ-sigma","τ-tau","υ-upsilon","φ-phi","χ-chi","ψ-psi","ω-omega","?-thetasym","?-upsih",
"?-piv","?-ensp","?-emsp","?-thinsp","?-zwnj","?-zwj","?-lrm","?-rlm","–-ndash","—-mdash","‘-lsquo","’-rsquo","?-sbquo",""-ldquo",""-rdquo","?-bdquo",
"?-dagger","?-Dagger","?-bull","…-hellip","‰-permil","′-prime","″-Prime","?-lsaquo","?-rsaquo","￣-oline","?-frasl","€-euro","?-image","?-weierp","?-real","?-trade",
"?-alefsym","←-larr","↑-uarr","→-rarr","↓-darr","?-harr","?-crarr","?-lArr","?-uArr","?-rArr","?-dArr","?-hArr","?-forall","?-part","?-exist","?-empty",
"?-nabla","∈-isin","?-notin","?-ni","∏-prod","∑-sum","?-minus","?-lowast","√-radic","∝-prop","∞-infin","∠-ang","∧-and","∨-or","∩-cap","∪-cup",
"∫-int","∴-there4","～-sim","?-cong","≈-asymp","≠-ne","≡-equiv","≤-le","≥-ge","?-sub","?-sup","?-nsub","?-sube","?-supe","⊕-oplus","?-otimes",
"⊥-perp","?-sdot","?-lceil","?-rceil","?-lfloor","?-rfloor","?-lang","?-rang","?-loz","?-spades","?-clubs","?-hearts","?-diams"
};
private static Dictionary<string, char> _lookupTable = GenerateLookupTable();
// Methods
private static Dictionary<string, char> GenerateLookupTable()
{
Dictionary<string, char> dictionary = new Dictionary<string, char>(StringComparer.Ordinal);
foreach (string str in _entitiesList)
{
dictionary.Add(str.Substring(2), str[0]);
}
return dictionary;
}
public static char Lookup(string entity)
{
char ch;
_lookupTable.TryGetValue(entity, out ch);
return ch;
}
}
} |
