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author | Lucas Wojciechowski <lucas@lucaswoj.com> | 2018-03-08 15:48:08 -0800 |
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committer | Tobrun <tobrun@mapbox.com> | 2018-03-09 11:12:14 +0100 |
commit | 8a3deab73373c8f3182e4337a3619ebcc58ecc2c (patch) | |
tree | 46774560da0eac1e710dccbf41af2f2e7e8794c4 /src/mbgl/style | |
parent | 6179110b6bfe8ee0880a055a31c12a88f9bd9b20 (diff) | |
download | qtlocation-mapboxgl-8a3deab73373c8f3182e4337a3619ebcc58ecc2c.tar.gz |
[core] Add expression filter support (#11251)
* WIP
* WIP
* WIP
* Remove Filter::operator()(const Feature&)
* WIP
* WIP
* WIP
* WIP
* Hook up expression filter evaluator
* Replace `shared_ptr` with &reference
* Fill in implementation of `void operator()(const ExpressionFilter&)`
* Fix failing tests
* Switch back to a shared_ptr per chat with @anandthakker
* Fix benchmark compilation
* Shot in the dark to fix CI
* Shot in the dark to fix CI (part 2)
* Shot in the dark to fix CI (part 3)
* In src/mbgl/style/conversion/filter.cpp, add a port of isExpressionFilter and use it to decide in Converter<Filter>::operator() whether to parse the incoming JSON as an ExpressionFilter or one of the legacy filter types
* Remove bool Filter::operator()(const GeometryTileFeature&) const
* Ensure the map zoom is passed into filtering operations wherever applicable
* Add expression filter tests
* Addressed PR feedback
* Implement `NSPredicate *operator()(mbgl::style::ExpressionFilter filter)`
* Fix formatting& nit
Diffstat (limited to 'src/mbgl/style')
-rw-r--r-- | src/mbgl/style/conversion/filter.cpp | 65 | ||||
-rw-r--r-- | src/mbgl/style/conversion/stringify.hpp | 4 | ||||
-rw-r--r-- | src/mbgl/style/filter.cpp | 13 | ||||
-rw-r--r-- | src/mbgl/style/filter_evaluator.cpp | 225 |
4 files changed, 301 insertions, 6 deletions
diff --git a/src/mbgl/style/conversion/filter.cpp b/src/mbgl/style/conversion/filter.cpp index bb7bb6ea98..fba149da12 100644 --- a/src/mbgl/style/conversion/filter.cpp +++ b/src/mbgl/style/conversion/filter.cpp @@ -1,11 +1,52 @@ #include <mbgl/style/conversion/filter.hpp> #include <mbgl/util/geometry.hpp> +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/type.hpp> +#include <mbgl/style/conversion/expression.hpp> namespace mbgl { namespace style { namespace conversion { + +using GeometryValue = mapbox::geometry::value; -static optional<Value> normalizeValue(const optional<Value>& value, Error& error) { +// This is a port from https://github.com/mapbox/mapbox-gl-js/blob/master/src/style-spec/feature_filter/index.js +static bool isExpressionFilter(const Convertible& filter) { + if (!isArray(filter) || arrayLength(filter) == 0) { + return false; + } + + optional<std::string> op = toString(arrayMember(filter, 0)); + + if (!op) { + return false; + + } else if (*op == "has") { + if (arrayLength(filter) < 2) return false; + optional<std::string> operand = toString(arrayMember(filter, 1)); + return operand && *operand != "$id" && *operand != "$type"; + + } else if (*op == "in" || *op == "!in" || *op == "!has" || *op == "none") { + return false; + + } else if (*op == "==" || *op == "!=" || *op == ">" || *op == ">=" || *op == "<" || *op == "<=") { + return arrayLength(filter) == 3 && (isArray(arrayMember(filter, 1)) || isArray(arrayMember(filter, 2))); + + } else if (*op == "any" || *op == "all") { + for (std::size_t i = 1; i < arrayLength(filter); i++) { + Convertible f = arrayMember(filter, i); + if (!isExpressionFilter(f) && !toBool(f)) { + return false; + } + } + return true; + + } else { + return true; + } +} + +static optional<GeometryValue> normalizeValue(const optional<GeometryValue>& value, Error& error) { if (!value) { error = { "filter expression value must be a boolean, number, or string" }; return {}; @@ -32,7 +73,7 @@ static optional<FeatureType> toFeatureType(const Convertible& value, Error& erro } static optional<FeatureIdentifier> toFeatureIdentifier(const Convertible& value, Error& error) { - optional<Value> identifier = toValue(value); + optional<GeometryValue> identifier = toValue(value); if (!identifier) { error = { "filter expression value must be a boolean, number, or string" }; return {}; @@ -99,7 +140,7 @@ optional<Filter> convertEqualityFilter(const Convertible& value, Error& error) { return { IdentifierFilterType { *filterValue } }; } else { - optional<Value> filterValue = normalizeValue(toValue(arrayMember(value, 2)), error); + optional<GeometryValue> filterValue = normalizeValue(toValue(arrayMember(value, 2)), error); if (!filterValue) { return {}; } @@ -121,7 +162,7 @@ optional<Filter> convertBinaryFilter(const Convertible& value, Error& error) { return {}; } - optional<Value> filterValue = normalizeValue(toValue(arrayMember(value, 2)), error); + optional<GeometryValue> filterValue = normalizeValue(toValue(arrayMember(value, 2)), error); if (!filterValue) { return {}; } @@ -167,9 +208,9 @@ optional<Filter> convertSetFilter(const Convertible& value, Error& error) { return { IdentifierFilterType { std::move(values) } }; } else { - std::vector<Value> values; + std::vector<GeometryValue> values; for (std::size_t i = 2; i < arrayLength(value); ++i) { - optional<Value> filterValue = normalizeValue(toValue(arrayMember(value, i)), error); + optional<GeometryValue> filterValue = normalizeValue(toValue(arrayMember(value, i)), error); if (!filterValue) { return {}; } @@ -193,8 +234,20 @@ optional<Filter> convertCompoundFilter(const Convertible& value, Error& error) { return { FilterType { std::move(filters) } }; } + +optional<Filter> convertExpressionFilter(const Convertible& value, Error& error) { + optional<std::unique_ptr<Expression>> expression = convert<std::unique_ptr<Expression>>(value, error, expression::type::Boolean); + if (!expression) { + return {}; + } + return { ExpressionFilter { std::move(*expression) } }; +} optional<Filter> Converter<Filter>::operator()(const Convertible& value, Error& error) const { + if (isExpressionFilter(value)) { + return convertExpressionFilter(value, error); + } + if (!isArray(value)) { error = { "filter expression must be an array" }; return {}; diff --git a/src/mbgl/style/conversion/stringify.hpp b/src/mbgl/style/conversion/stringify.hpp index 6ae6fede42..7924a442c4 100644 --- a/src/mbgl/style/conversion/stringify.hpp +++ b/src/mbgl/style/conversion/stringify.hpp @@ -225,6 +225,10 @@ public: void operator()(const NotHasIdentifierFilter&) { stringifyUnaryFilter("!has", "$id"); } + + void operator()(const ExpressionFilter& filter) { + stringify(writer, filter.expression->serialize()); + } private: template <class F> diff --git a/src/mbgl/style/filter.cpp b/src/mbgl/style/filter.cpp new file mode 100644 index 0000000000..51aa6bcf82 --- /dev/null +++ b/src/mbgl/style/filter.cpp @@ -0,0 +1,13 @@ +#include <mbgl/style/filter.hpp> +#include <mbgl/style/filter_evaluator.hpp> +#include <mbgl/tile/geometry_tile_data.hpp> + +namespace mbgl { +namespace style { + +bool Filter::operator()(const expression::EvaluationContext &context) const { + return FilterBase::visit(*this, FilterEvaluator { context }); +} + +} // namespace style +} // namespace mbgl diff --git a/src/mbgl/style/filter_evaluator.cpp b/src/mbgl/style/filter_evaluator.cpp new file mode 100644 index 0000000000..72022172f4 --- /dev/null +++ b/src/mbgl/style/filter_evaluator.cpp @@ -0,0 +1,225 @@ +#include <mbgl/style/filter.hpp> +#include <mbgl/style/filter_evaluator.hpp> +#include <mbgl/tile/geometry_tile_data.hpp> + +namespace mbgl { +namespace style { + +template <class Op> +struct Comparator { + const Op& op; + + template <class T> + bool operator()(const T& lhs, const T& rhs) const { + return op(lhs, rhs); + } + + template <class T0, class T1> + auto operator()(const T0& lhs, const T1& rhs) const + -> typename std::enable_if_t<std::is_arithmetic<T0>::value && !std::is_same<T0, bool>::value && + std::is_arithmetic<T1>::value && !std::is_same<T1, bool>::value, bool> { + return op(double(lhs), double(rhs)); + } + + template <class T0, class T1> + auto operator()(const T0&, const T1&) const + -> typename std::enable_if_t<!std::is_arithmetic<T0>::value || std::is_same<T0, bool>::value || + !std::is_arithmetic<T1>::value || std::is_same<T1, bool>::value, bool> { + return false; + } + + bool operator()(const NullValue&, + const NullValue&) const { + // Should be unreachable; null is not currently allowed by the style specification. + assert(false); + return false; + } + + bool operator()(const std::vector<Value>&, + const std::vector<Value>&) const { + // Should be unreachable; nested values are not currently allowed by the style specification. + assert(false); + return false; + } + + bool operator()(const PropertyMap&, + const PropertyMap&) const { + // Should be unreachable; nested values are not currently allowed by the style specification. + assert(false); + return false; + } +}; + +template <class Op> +bool compare(const Value& lhs, const Value& rhs, const Op& op) { + return Value::binary_visit(lhs, rhs, Comparator<Op> { op }); +} + +bool equal(const Value& lhs, const Value& rhs) { + return compare(lhs, rhs, [] (const auto& lhs_, const auto& rhs_) { return lhs_ == rhs_; }); +} + +bool FilterEvaluator::operator()(const NullFilter&) const { + return true; +} + +bool FilterEvaluator::operator()(const EqualsFilter& filter) const { + optional<Value> actual = context.feature->getValue(filter.key); + return actual && equal(*actual, filter.value); +} + +bool FilterEvaluator::operator()(const NotEqualsFilter& filter) const { + optional<Value> actual = context.feature->getValue(filter.key); + return !actual || !equal(*actual, filter.value); +} + +bool FilterEvaluator::operator()(const LessThanFilter& filter) const { + optional<Value> actual = context.feature->getValue(filter.key); + return actual && compare(*actual, filter.value, [] (const auto& lhs_, const auto& rhs_) { return lhs_ < rhs_; }); +} + +bool FilterEvaluator::operator()(const LessThanEqualsFilter& filter) const { + optional<Value> actual = context.feature->getValue(filter.key); + return actual && compare(*actual, filter.value, [] (const auto& lhs_, const auto& rhs_) { return lhs_ <= rhs_; }); +} + +bool FilterEvaluator::operator()(const GreaterThanFilter& filter) const { + optional<Value> actual = context.feature->getValue(filter.key); + return actual && compare(*actual, filter.value, [] (const auto& lhs_, const auto& rhs_) { return lhs_ > rhs_; }); +} + +bool FilterEvaluator::operator()(const GreaterThanEqualsFilter& filter) const { + optional<Value> actual = context.feature->getValue(filter.key); + return actual && compare(*actual, filter.value, [] (const auto& lhs_, const auto& rhs_) { return lhs_ >= rhs_; }); +} + +bool FilterEvaluator::operator()(const InFilter& filter) const { + optional<Value> actual = context.feature->getValue(filter.key); + if (!actual) + return false; + for (const auto& v: filter.values) { + if (equal(*actual, v)) { + return true; + } + } + return false; +} + +bool FilterEvaluator::operator()(const NotInFilter& filter) const { + optional<Value> actual = context.feature->getValue(filter.key); + if (!actual) + return true; + for (const auto& v: filter.values) { + if (equal(*actual, v)) { + return false; + } + } + return true; +} + +bool FilterEvaluator::operator()(const AnyFilter& filter) const { + for (const auto& f: filter.filters) { + if (Filter::visit(f, *this)) { + return true; + } + } + return false; +} + +bool FilterEvaluator::operator()(const AllFilter& filter) const { + for (const auto& f: filter.filters) { + if (!Filter::visit(f, *this)) { + return false; + } + } + return true; +} + +bool FilterEvaluator::operator()(const NoneFilter& filter) const { + for (const auto& f: filter.filters) { + if (Filter::visit(f, *this)) { + return false; + } + } + return true; +} + +bool FilterEvaluator::operator()(const HasFilter& filter) const { + return bool(context.feature->getValue(filter.key)); +} + +bool FilterEvaluator::operator()(const NotHasFilter& filter) const { + return !context.feature->getValue(filter.key); +} + +bool FilterEvaluator::operator()(const TypeEqualsFilter& filter) const { + return context.feature->getType() == filter.value; +} + +bool FilterEvaluator::operator()(const TypeNotEqualsFilter& filter) const { + return context.feature->getType() != filter.value; +} + +bool FilterEvaluator::operator()(const TypeInFilter& filter) const { + for (const auto& v: filter.values) { + if (context.feature->getType() == v) { + return true; + } + } + return false; +} + +bool FilterEvaluator::operator()(const TypeNotInFilter& filter) const { + for (const auto& v: filter.values) { + if (context.feature->getType() == v) { + return false; + } + } + return true; +} + +bool FilterEvaluator::operator()(const IdentifierEqualsFilter& filter) const { + return context.feature->getID() == filter.value; +} + +bool FilterEvaluator::operator()(const IdentifierNotEqualsFilter& filter) const { + return context.feature->getID() != filter.value; +} + +bool FilterEvaluator::operator()(const IdentifierInFilter& filter) const { + for (const auto& v: filter.values) { + if (context.feature->getID() == v) { + return true; + } + } + return false; +} + +bool FilterEvaluator::operator()(const IdentifierNotInFilter& filter) const { + for (const auto& v: filter.values) { + if (context.feature->getID() == v) { + return false; + } + } + return true; +} + +bool FilterEvaluator::operator()(const HasIdentifierFilter&) const { + return bool(context.feature->getID()); +} + +bool FilterEvaluator::operator()(const NotHasIdentifierFilter&) const { + return !context.feature->getID(); +} + +bool FilterEvaluator::operator()(const ExpressionFilter& filter) const { + const expression::EvaluationResult result = filter.expression->evaluate(context); + if (result) { + const optional<bool> typed = expression::fromExpressionValue<bool>(*result); + return typed ? *typed : false; + } + return false; +} + +} // namespace style +} // namespace mbgl |