/// <summary>Parse the query</summary> /// <returns>Evaluator</returns> internal virtual Evaluator Parse() { tq.ConsumeWhitespace(); if (tq.MatchesAny(combinators)) { // if starts with a combinator, use root as elements evals.Add(new StructuralEvaluator.Root()); Combinator(tq.Consume()); } else { FindElements(); } while (!tq.IsEmpty()) { // hierarchy and extras bool seenWhite = tq.ConsumeWhitespace(); if (tq.MatchesAny(combinators)) { Combinator(tq.Consume()); } else { if (seenWhite) { Combinator(' '); } else { // E.class, E#id, E[attr] etc. AND FindElements(); } } } // take next el, #. etc off queue if (evals.Count == 1) { return(evals[0]); } return(new CombiningEvaluator.And(evals)); }
private void ByAttribute() { TokenQueue cq = new TokenQueue(tq.ChompBalanced('[', ']')); // content queue string key = cq.ConsumeToAny(AttributeEvals); // eq, not, start, end, contain, match, (no val) Validate.NotEmpty(key); cq.ConsumeWhitespace(); if (cq.IsEmpty()) { if (key.StartsWith("^", StringComparison.Ordinal)) { evals.Add(new Evaluator.AttributeStarting(key.Substring(1))); /*substring*/ } else { evals.Add(new Evaluator.Attribute(key)); } } else { if (cq.MatchChomp("=")) { evals.Add(new Evaluator.AttributeWithValue(key, cq.Remainder())); } else if (cq.MatchChomp("!=")) { evals.Add(new Evaluator.AttributeWithValueNot(key, cq.Remainder())); } else if (cq.MatchChomp("^=")) { evals.Add(new Evaluator.AttributeWithValueStarting(key, cq.Remainder())); } else if (cq.MatchChomp("$=")) { evals.Add(new Evaluator.AttributeWithValueEnding(key, cq.Remainder())); } else if (cq.MatchChomp("*=")) { evals.Add(new Evaluator.AttributeWithValueContaining(key, cq.Remainder())); } else if (cq.MatchChomp("~=")) { evals.Add(new Evaluator.AttributeWithValueMatching(key, new Regex(cq.Remainder(), RegexOptions.Compiled))); } else { throw new Selector.SelectorParseException("Could not parse attribute query '{0}': unexpected token at '{1}'", query, cq.Remainder()); } } }
private void ByAttribute() { TokenQueue cq = new TokenQueue(tq.ChompBalanced('[', ']')); // content queue String key = cq.ConsumeToAny(AttributeEvals); // eq, not, start, end, contain, match, (no val) Validate.NotEmpty(key); cq.ConsumeWhitespace(); if (cq.IsEmpty()) { if (key.StartsWith("^")) { evals.Add(new Evaluator.AttributeStarting(key.Substring(1))); } else { evals.Add(new Evaluator.Attribute(key)); } } else { if (cq.MatchChomp("=")) { evals.Add(new Evaluator.AttributeWithValue(key, cq.Remainder())); } else { if (cq.MatchChomp("!=")) { evals.Add(new Evaluator.AttributeWithValueNot(key, cq.Remainder())); } else { if (cq.MatchChomp("^=")) { evals.Add(new Evaluator.AttributeWithValueStarting(key, cq.Remainder())); } else { if (cq.MatchChomp("$=")) { evals.Add(new Evaluator.AttributeWithValueEnding(key, cq.Remainder())); } else { if (cq.MatchChomp("*=")) { evals.Add(new Evaluator.AttributeWithValueContaining(key, cq.Remainder())); } else { if (cq.MatchChomp("~=")) { evals.Add(new Evaluator.AttributeWithValueMatching(key, iText.IO.Util.StringUtil.RegexCompile(cq.Remainder ()))); } else { throw new Selector.SelectorParseException("Could not parse attribute query " + PortUtil.EscapedSingleBracket + "{0}" + PortUtil.EscapedSingleBracket + ": unexpected token at " + PortUtil.EscapedSingleBracket + "{1}" + PortUtil.EscapedSingleBracket, query, cq.Remainder()); } } } } } } } }