/* 18.4 Shared String Table */
var parse_sst = (function(){
	var tregex = matchtag("t"), rpregex = matchtag("rPr");
	/* Parse a list of <r> tags */
	var parse_rs = (function() {
		/* 18.4.7 rPr CT_RPrElt */
		var parse_rpr = function(rpr, intro, outro) {
			var font = {};
			rpr.match(/<[^>]*>/g).forEach(function(x) {
				var y = parsexmltag(x);
				switch(y[0]) {
					/* 18.8.12 condense CT_BooleanProperty */
					/* ** not required . */
					case '<condense': break;
					/* 18.8.17 extend CT_BooleanProperty */
					/* ** not required . */
					case '<extend': break;
					/* 18.8.36 shadow CT_BooleanProperty */
					/* ** not required . */
					case '<shadow': break;

					/* 18.4.1 charset CT_IntProperty TODO */
					case '<charset': break;

					/* 18.4.2 outline CT_BooleanProperty TODO */
					case '<outline': break;

					/* 18.4.5 rFont CT_FontName */
					case '<rFont': font.name = y.val; break;

					/* 18.4.11 sz CT_FontSize */
					case '<sz': font.sz = y.val; break;

					/* 18.4.10 strike CT_BooleanProperty */
					case '<strike':
						if(!y.val) break;
						/* falls through */
					case '<strike/>': font.strike = 1; break;
					case '</strike>': break;

					/* 18.4.13 u CT_UnderlineProperty */
					case '<u':
						if(!y.val) break;
						/* falls through */
					case '<u/>': font.u = 1; break;
					case '</u>': break;

					/* 18.8.2 b */
					case '<b':
						if(!y.val) break;
						/* falls through */
					case '<b/>': font.b = 1; break;
					case '</b>': break;

					/* 18.8.26 i */
					case '<i':
						if(!y.val) break;
						/* falls through */
					case '<i/>': font.i = 1; break;
					case '</i>': break;

					/* 18.3.1.15 color CT_Color TODO: tint, theme, auto, indexed */
					case '<color':
						if(y.rgb) font.color = y.rgb.substr(2,6);
						break;

					/* 18.8.18 family ST_FontFamily */
					case '<family': font.family = y.val; break;

					/* 18.4.14 vertAlign CT_VerticalAlignFontProperty TODO */
					case '<vertAlign': break;

					/* 18.8.35 scheme CT_FontScheme TODO */
					case '<scheme': break;

					default:
						if(y[0][2] !== '/') throw 'Unrecognized rich format ' + y[0];
				}
			});
			/* TODO: These should be generated styles, not inline */
			var style = [];
			if(font.b) style.push("font-weight: bold;");
			if(font.i) style.push("font-style: italic;");
			intro.push('<span style="' + style.join("") + '">');
			outro.push("</span>");
		};

		/* 18.4.4 r CT_RElt */
		function parse_r(r) {
			var terms = [[],"",[]];
			/* 18.4.12 t ST_Xstring */
			var t = r.match(tregex);
			if(!isval(t)) return "";
			terms[1] = t[1];

			var rpr = r.match(rpregex);
			if(isval(rpr)) parse_rpr(rpr[1], terms[0], terms[2]);
			return terms[0].join("") + terms[1].replace(/\r\n/g,'<br/>') + terms[2].join("");
		}
		return function(rs) {
			return rs.replace(/<r>/g,"").split(/<\/r>/).map(parse_r).join("");
		};
	})();

	/* 18.4.8 si CT_Rst */
	var parse_si = function(x) {
		var z = {};
		if(!x) return z;
		var y;
		/* 18.4.12 t ST_Xstring (Plaintext String) */
		if(x[1] === 't') {
			z.t = utf8read(unescapexml(x.replace(/<[^>]*>/g,"")));
			z.raw = x;
			z.r = z.t;
		}
		/* 18.4.4 r CT_RElt (Rich Text Run) */
		else if((y = x.match(/<r>/))) {
			z.raw = x;
			/* TODO: properly parse (note: no other valid child can have body text) */
			z.t = utf8read(unescapexml(x.replace(/<[^>]*>/gm,"")));
			z.r = parse_rs(x);
		}
		/* 18.4.3 phoneticPr CT_PhoneticPr (TODO: needed for Asian support) */
		/* 18.4.6 rPh CT_PhoneticRun (TODO: needed for Asian support) */
		return z;
	};


	return function(data) {
		var s = [];
		/* 18.4.9 sst CT_Sst */
		var sst = data.match(new RegExp("<sst([^>]*)>([\\s\\S]*)<\/sst>","m"));
		if(sst) {
			s = sst[2].replace(/<si>/g,"").split(/<\/si>/).map(parse_si);
			sst = parsexmltag(sst[1]); s.Count = sst.count; s.Unique = sst.uniqueCount;
		}
		return s;
	};
})();