1 /* 2 * Copyright (C) 2005 Frerich Raabe <raabe@kde.org> 3 * Copyright (C) 2006, 2009 Apple Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_PATH_H_ 28 #define THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_PATH_H_ 29 30 #include "third_party/blink/renderer/core/xml/xpath_expression_node.h" 31 #include "third_party/blink/renderer/core/xml/xpath_node_set.h" 32 33 namespace blink { 34 35 namespace xpath { 36 37 class Predicate; 38 class Step; 39 40 class Filter final : public Expression { 41 public: 42 Filter(Expression*, HeapVector<Member<Predicate>>&); 43 ~Filter() override; 44 void Trace(Visitor*) override; 45 46 Value Evaluate(EvaluationContext&) const override; 47 48 private: ResultType()49 Value::Type ResultType() const override { return Value::kNodeSetValue; } 50 51 Member<Expression> expr_; 52 HeapVector<Member<Predicate>> predicates_; 53 }; 54 55 class LocationPath final : public Expression { 56 public: 57 LocationPath(); 58 ~LocationPath() override; 59 void Trace(Visitor*) override; 60 61 Value Evaluate(EvaluationContext&) const override; SetAbsolute(bool value)62 void SetAbsolute(bool value) { 63 absolute_ = value; 64 SetIsContextNodeSensitive(!absolute_); 65 } 66 void Evaluate(EvaluationContext&, 67 NodeSet&) const; // nodes is an input/output parameter 68 void AppendStep(Step*); 69 void InsertFirstStep(Step*); 70 71 private: ResultType()72 Value::Type ResultType() const override { return Value::kNodeSetValue; } 73 74 HeapVector<Member<Step>> steps_; 75 bool absolute_; 76 }; 77 78 class Path final : public Expression { 79 public: 80 Path(Expression*, LocationPath*); 81 ~Path() override; 82 void Trace(Visitor*) override; 83 84 Value Evaluate(EvaluationContext&) const override; 85 86 private: ResultType()87 Value::Type ResultType() const override { return Value::kNodeSetValue; } 88 89 Member<Expression> filter_; 90 Member<LocationPath> path_; 91 }; 92 93 } // namespace xpath 94 95 } // namespace blink 96 #endif // THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_PATH_H_ 97