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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| #pragma once | ||
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| #include <mbgl/style/conversion.hpp> | ||
| #include <mbgl/style/expression/expression.hpp> | ||
| #include <memory> | ||
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| namespace mbgl { | ||
| namespace style { | ||
| namespace expression { | ||
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| class In : public Expression { | ||
| public: | ||
| In(std::unique_ptr<Expression> needle_, std::unique_ptr<Expression> haystack_) | ||
| : Expression(Kind::In, type::Boolean), needle(std::move(needle_)), haystack(std::move(haystack_)) {} | ||
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| static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); | ||
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| EvaluationResult evaluate(const EvaluationContext& params) const override; | ||
| void eachChild(const std::function<void(const Expression&)>&) const override; | ||
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| bool operator==(const Expression& e) const override { | ||
| if (e.getKind() == Kind::In) { | ||
| auto rhs = static_cast<const In*>(&e); | ||
| return *needle == *(rhs->needle) && *haystack == *(rhs->haystack); | ||
| } | ||
| return false; | ||
| } | ||
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| std::vector<optional<Value>> possibleOutputs() const override { return {nullopt}; } | ||
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| std::string getOperator() const override { return "in"; } | ||
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| private: | ||
| std::unique_ptr<Expression> needle; | ||
| std::unique_ptr<Expression> haystack; | ||
| static bool isComparableType(type::Type type); | ||
| static bool isComparableRuntimeValue(type::Type type); | ||
| static bool isSearchableRuntimeValue(type::Type type); | ||
| }; | ||
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| } // namespace expression | ||
| } // namespace style | ||
| } // namespace mbgl |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| #include <mbgl/style/conversion_impl.hpp> | ||
| #include <mbgl/style/expression/in.hpp> | ||
| #include <mbgl/style/expression/type.hpp> | ||
| #include <mbgl/util/string.hpp> | ||
| #include <string.h> | ||
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| namespace mbgl { | ||
| namespace style { | ||
| namespace expression { | ||
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| EvaluationResult In::evaluate(const EvaluationContext& params) const { | ||
| const EvaluationResult evaluatedNeedle = needle->evaluate(params); | ||
| const EvaluationResult evaluatedHeystack = haystack->evaluate(params); | ||
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| if (!evaluatedNeedle) { | ||
| return evaluatedNeedle.error(); | ||
| } | ||
| if (!evaluatedHeystack) { | ||
| return evaluatedHeystack.error(); | ||
| } | ||
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| type::Type evaluatedNeedleType = typeOf(*evaluatedNeedle); | ||
| if (!isComparableRuntimeValue(evaluatedNeedleType)) { | ||
| return EvaluationError{"Expected first argument to be of type boolean, string or number, but found " + | ||
| toString(evaluatedNeedleType) + " instead."}; | ||
| } | ||
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| type::Type evaluatedHeystackType = typeOf(*evaluatedHeystack); | ||
| if (!isSearchableRuntimeValue(evaluatedHeystackType)) { | ||
| return EvaluationError{"Expected second argument to be of type array or string, but found " + | ||
| toString(evaluatedHeystackType) + " instead."}; | ||
| } | ||
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| if (evaluatedNeedleType == type::Null || evaluatedHeystackType == type::Null) { | ||
| return EvaluationResult(false); | ||
| } | ||
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| if (evaluatedHeystackType == type::String) { | ||
| const auto heystackString = evaluatedHeystack->get<std::string>(); | ||
| std::string needleValue = ""; | ||
| if (evaluatedNeedleType == type::Boolean) { | ||
| needleValue = evaluatedNeedle->get<bool>() ? "true" : " false"; | ||
| } else if(evaluatedNeedleType == type::String) { | ||
| needleValue = evaluatedNeedle->get<std::string>(); | ||
| } else if(evaluatedNeedleType == type::Number) { | ||
| needleValue = std::to_string(evaluatedNeedle->get<double>()); | ||
| needleValue.erase ( needleValue.find_last_not_of('0') + 1, std::string::npos ); | ||
| needleValue.erase ( needleValue.find_last_not_of('.') + 1, std::string::npos ); | ||
| } | ||
| return EvaluationResult(heystackString.find(needleValue) != std::string::npos); | ||
| } else { | ||
| const auto heystackArray = evaluatedHeystack->get<std::vector<Value>>(); | ||
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| bool result = false; | ||
| if(evaluatedNeedleType == type::Boolean) { | ||
| auto needleValue = evaluatedNeedle->get<bool>(); | ||
| result = find(heystackArray.begin(), heystackArray.end(), needleValue) != heystackArray.end(); | ||
| } else if(evaluatedNeedleType == type::String) { | ||
| auto needleValue = evaluatedNeedle->get<std::string>(); | ||
| result = find(heystackArray.begin(), heystackArray.end(), needleValue) != heystackArray.end(); | ||
| } else if(evaluatedNeedleType == type::Number) { | ||
| auto needleValue = evaluatedNeedle->get<double>(); | ||
| result = find(heystackArray.begin(), heystackArray.end(), needleValue) != heystackArray.end(); | ||
| } | ||
| return EvaluationResult(result); | ||
| } | ||
| } | ||
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| void In::eachChild(const std::function<void(const Expression&)>& visit) const { | ||
| visit(*needle); | ||
| visit(*haystack); | ||
| } | ||
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| using namespace mbgl::style::conversion; | ||
| ParseResult In::parse(const Convertible& value, ParsingContext& ctx) { | ||
| assert(isArray(value)); | ||
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| std::size_t length = arrayLength(value); | ||
| if (length != 3) { | ||
| ctx.error("Expected 2 arguments, but found " + util::toString(length - 1) + " instead."); | ||
| return ParseResult(); | ||
| } | ||
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| ParseResult needle = ctx.parse(arrayMember(value, 1), 1, {type::Value}); | ||
| ParseResult haystack = ctx.parse(arrayMember(value, 2), 2, {type::Value}); | ||
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| if (!needle || !haystack) return ParseResult(); | ||
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| type::Type needleType = (*needle)->getType();; | ||
| type::Type haystackType = (*haystack)->getType();; | ||
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| if (!isComparableType(needleType)) { | ||
| ctx.error("Expected first argument to be of type boolean, string or number, but found " + | ||
| toString(needleType) + " instead."); | ||
| return ParseResult(); | ||
| } | ||
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| return ParseResult(std::make_unique<In>(std::move(*needle), std::move(*haystack))); | ||
| } | ||
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| bool In::isComparableType(type::Type type) { | ||
| return type == type::Boolean || type == type::String || type == type::Number || type == type::Null || | ||
| type == type::Value; | ||
| } | ||
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| bool In::isComparableRuntimeValue(type::Type type) { | ||
| return type == type::Boolean || type == type::String || type == type::Number || type == type::Null; | ||
| } | ||
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| bool In::isSearchableRuntimeValue(type::Type type) { | ||
| return type == type::String || type.is<type::Array>() || type == type::Null; | ||
| } | ||
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| } // namespace expression | ||
| } // namespace style | ||
| } // namespace mbgl |
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