HtmlHelper.cs | searchcode

/Source/Pronto/HtmlHelper.cs

http://prontocms.googlecode.com/
C# | 292 lines | 286 code | 4 blank | 2 comment | 11 complexity | ea72bd64852c61fd7c4f28ae3b1e951b MD5 | raw file
Possible License(s): LGPL-2.1

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Xml.Linq;



namespace Pronto

{

    public static class HtmlHelper

    {

        public static IEnumerable<XObject> ParseXObjects(this string content)

        {

            return XElement.Parse("<body>" + ConvertHtmlEntitiesToNumbers(content) + "</body>").Nodes().Cast<XObject>();

        }



        static string ConvertHtmlEntitiesToNumbers(string input)

        {

            var sb = new StringBuilder(input);

            for (int i = 0; i < sb.Length; i++)

            {

                if (sb[i] == '&')

                {

                    i = ReplaceEntity(sb, i);

                }

            }

            return sb.ToString();

        }



        static int ReplaceEntity(StringBuilder sb, int i)

        {

            int start = i;

            while (++i < sb.Length && sb[i] != ';') ;

            if (i == sb.Length) throw new ArgumentException("Could not find closing ';' for '&' at position " + start + ".");

            int length = i - start + 1;

            char[] chars = new char[length];

            sb.CopyTo(start, chars, 0, length);

            if (chars[1] != '#') // ignore numeric entities

            {

                var entity = new string(chars);

                string numericCode;

                if (entityMap.TryGetValue(entity, out numericCode))

                {

                    sb.Remove(start, length);

                    sb.Insert(start, numericCode);

                }

            }

            return i;

        }



        // XDocument won't like HTML entities.

        // This map converts to numeric character codes.

        static readonly Dictionary<string, string> entityMap = new Dictionary<string, string>

        {

            { "&nbsp;", "&#160;"},

            { "&iexcl;", "&#161;"},

            { "&cent;", "&#162;"},

            { "&pound;", "&#163;"},

            { "&curren;", "&#164;"},

            { "&yen;", "&#165;"},

            { "&brvbar;", "&#166;"},

            { "&sect;", "&#167;"},

            { "&uml;", "&#168;"},

            { "&copy;", "&#169;"},

            { "&ordf;", "&#170;"},

            { "&laquo;", "&#171;"},

            { "&not;", "&#172;"},

            { "&shy;", "&#173;"},

            { "&reg;", "&#174;"},

            { "&macr;", "&#175;"},

            { "&deg;", "&#176;"},

            { "&plusmn;", "&#177;"},

            { "&sup2;", "&#178;"},

            { "&sup3;", "&#179;"},

            { "&acute;", "&#180;"},

            { "&micro;", "&#181;"},

            { "&para;", "&#182;"},

            { "&middot;", "&#183;"},

            { "&cedil;", "&#184;"},

            { "&sup1;", "&#185;"},

            { "&ordm;", "&#186;"},

            { "&raquo;", "&#187;"},

            { "&frac14;", "&#188;"},

            { "&frac12;", "&#189;"},

            { "&frac34;", "&#190;"},

            { "&iquest;", "&#191;"},

            { "&times;", "&#215;"},

            { "&divide;", "&#247;"},

            { "&Agrave;", "&#192;"},

            { "&Aacute;", "&#193;"},

            { "&Acirc;", "&#194;"},

            { "&Atilde;", "&#195;"},

            { "&Auml;", "&#196;"},

            { "&Aring;", "&#197;"},

            { "&AElig;", "&#198;"},

            { "&Ccedil;", "&#199;"},

            { "&Egrave;", "&#200;"},

            { "&Eacute;", "&#201;"},

            { "&Ecirc;", "&#202;"},

            { "&Euml;", "&#203;"},

            { "&Igrave;", "&#204;"},

            { "&Iacute;", "&#205;"},

            { "&Icirc;", "&#206;"},

            { "&Iuml;", "&#207;"},

            { "&ETH;", "&#208;"},

            { "&Ntilde;", "&#209;"},

            { "&Ograve;", "&#210;"},

            { "&Oacute;", "&#211;"},

            { "&Ocirc;", "&#212;"},

            { "&Otilde;", "&#213;"},

            { "&Ouml;", "&#214;"},

            { "&Oslash;", "&#216;"},

            { "&Ugrave;", "&#217;"},

            { "&Uacute;", "&#218;"},

            { "&Ucirc;", "&#219;"},

            { "&Uuml;", "&#220;"},

            { "&Yacute;", "&#221;"},

            { "&THORN;", "&#222;"},

            { "&szlig;", "&#223;"},

            { "&agrave;", "&#224;"},

            { "&aacute;", "&#225;"},

            { "&acirc;", "&#226;"},

            { "&atilde;", "&#227;"},

            { "&auml;", "&#228;"},

            { "&aring;", "&#229;"},

            { "&aelig;", "&#230;"},

            { "&ccedil;", "&#231;"},

            { "&egrave;", "&#232;"},

            { "&eacute;", "&#233;"},

            { "&ecirc;", "&#234;"},

            { "&euml;", "&#235;"},

            { "&igrave;", "&#236;"},

            { "&iacute;", "&#237;"},

            { "&icirc;", "&#238;"},

            { "&iuml;", "&#239;"},

            { "&eth;", "&#240;"},

            { "&ntilde;", "&#241;"},

            { "&ograve;", "&#242;"},

            { "&oacute;", "&#243;"},

            { "&ocirc;", "&#244;"},

            { "&otilde;", "&#245;"},

            { "&ouml;", "&#246;"},

            { "&oslash;", "&#248;"},

            { "&ugrave;", "&#249;"},

            { "&uacute;", "&#250;"},

            { "&ucirc;", "&#251;"},

            { "&uuml;", "&#252;"},

            { "&yacute;", "&#253;"},

            { "&thorn;", "&#254;"},

            { "&yuml;", "&#255;"},

            { "&OElig;", "&#338;" },

            { "&oelig;", "&#339;" },

            { "&Scaron;", "&#352;" },

            { "&scaron;", "&#353;" },

            { "&Yuml;", "&#376;" },

            { "&fnof;", "&#402;" },

            { "&circ;", "&#710;" },

            { "&tilde;", "&#732;" },

            { "&ensp;", "&#8194;" },

            { "&emsp;", "&#8195;" },

            { "&thinsp;", "&#8201;" },

            { "&zwnj;", "&#8204;" },

            { "&zwj;", "&#8205;" },

            { "&lrm;", "&#8206;" },

            { "&rlm;", "&#8207;" },

            { "&ndash;", "&#8211;" },

            { "&mdash;", "&#8212;" },

            { "&lsquo;", "&#8216;" },

            { "&rsquo;", "&#8217;" },

            { "&sbquo;", "&#8218;" },

            { "&ldquo;", "&#8220;" },

            { "&rdquo;", "&#8221;" },

            { "&bdquo;", "&#8222;" },

            { "&dagger;", "&#8224;" },

            { "&Dagger;", "&#8225;" },

            { "&bull;", "&#8226;" },

            { "&hellip;", "&#8230;" },

            { "&permil;", "&#8240;" },

            { "&prime;", "&#8242;" },

            { "&Prime;", "&#8243;" },

            { "&lsaquo;", "&#8249;" },

            { "&rsaquo;", "&#8250;" },

            { "&oline;", "&#8254;" },

            { "&euro;", "&#8364;" },

            { "&trade;", "&#8482;" },

            { "&larr;", "&#8592;" },

            { "&uarr;", "&#8593;" },

            { "&rarr;", "&#8594;" },

            { "&darr;", "&#8595;" },

            { "&harr;", "&#8596;" },

            { "&crarr;", "&#8629;" },

            { "&lceil;", "&#8968;" },

            { "&rceil;", "&#8969;" },

            { "&lfloor;", "&#8970;" },

            { "&rfloor;", "&#8971;" },

            { "&loz;", "&#9674;" },

            { "&spades;", "&#9824;" },

            { "&clubs;", "&#9827;" },

            { "&hearts;", "&#9829;" },

            { "&diams;", "&#9830;" },

            { "&Alpha;", "&#913;" },

            { "&Beta;", "&#914;" },

            { "&Gamma;", "&#915;" },

            { "&Delta;", "&#916;" },

            { "&Epsilon;", "&#917;" },

            { "&Zeta;", "&#918;" },

            { "&Eta;", "&#919;" },

            { "&Theta;", "&#920;" },

            { "&Iota;", "&#921;" },

            { "&Kappa;", "&#922;" },

            { "&Lambda;", "&#923;" },

            { "&Mu;", "&#924;" },

            { "&Nu;", "&#925;" },

            { "&Xi;", "&#926;" },

            { "&Omicron;", "&#927;" },

            { "&Pi;", "&#928;" },

            { "&Rho;", "&#929;" },

            { "&Sigma;", "&#931;" },

            { "&Tau;", "&#932;" },

            { "&Upsilon;", "&#933;" },

            { "&Phi;", "&#934;" },

            { "&Chi;", "&#935;" },

            { "&Psi;", "&#936;" },

            { "&Omega;", "&#937;" },

            { "&alpha;", "&#945;" },

            { "&beta;", "&#946;" },

            { "&gamma;", "&#947;" },

            { "&delta;", "&#948;" },

            { "&epsilon;", "&#949;" },

            { "&zeta;", "&#950;" },

            { "&eta;", "&#951;" },

            { "&theta;", "&#952;" },

            { "&iota;", "&#953;" },

            { "&kappa;", "&#954;" },

            { "&lambda;", "&#955;" },

            { "&mu;", "&#956;" },

            { "&nu;", "&#957;" },

            { "&xi;", "&#958;" },

            { "&omicron;", "&#959;" },

            { "&pi;", "&#960;" },

            { "&rho;", "&#961;" },

            { "&sigmaf;", "&#962;" },

            { "&sigma;", "&#963;" },

            { "&tau;", "&#964;" },

            { "&upsilon;", "&#965;" },

            { "&phi;", "&#966;" },

            { "&chi;", "&#967;" },

            { "&psi;", "&#968;" },

            { "&omega;", "&#969;" },

            { "&thetasym;", "&#977;" },

            { "&upsih;", "&#978;" },

            { "&piv;", "&#982;" },

            { "&forall;", "&#8704;" },

            { "&part;", "&#8706;" },

            { "&exists;", "&#8707;" },

            { "&empty;", "&#8709;" },

            { "&nabla;", "&#8711;" },

            { "&isin;", "&#8712;" },

            { "&notin;", "&#8713;" },

            { "&ni;", "&#8715;" },

            { "&prod;", "&#8719;" },

            { "&sum;", "&#8721;" },

            { "&minus;", "&#8722;" },

            { "&lowast;", "&#8727;" },

            { "&radic;", "&#8730;" },

            { "&prop;", "&#8733;" },

            { "&infin;", "&#8734;" },

            { "&ang;", "&#8736;" },

            { "&and;", "&#8743;" },

            { "&or;", "&#8744;" },

            { "&cap;", "&#8745;" },

            { "&cup;", "&#8746;" },

            { "&int;", "&#8747;" },

            { "&there4;", "&#8756;" },

            { "&sim;", "&#8764;" },

            { "&cong;", "&#8773;" },

            { "&asymp;", "&#8776;" },

            { "&ne;", "&#8800;" },

            { "&equiv;", "&#8801;" },

            { "&le;", "&#8804;" },

            { "&ge;", "&#8805;" },

            { "&sub;", "&#8834;" },

            { "&sup;", "&#8835;" },

            { "&nsub;", "&#8836;" },

            { "&sube;", "&#8838;" },

            { "&supe;", "&#8839;" },

            { "&oplus;", "&#8853;" },

            { "&otimes;", "&#8855;" },

            { "&perp;", "&#8869;" },

            { "&sdot;", "&#8901;" }

        };

    }

}