diff options
| -rw-r--r-- | src/mbgl/style/expression/compound_expression.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/mbgl/style/expression/compound_expression.cpp b/src/mbgl/style/expression/compound_expression.cpp index c637856ad9..8bd21bdad7 100644 --- a/src/mbgl/style/expression/compound_expression.cpp +++ b/src/mbgl/style/expression/compound_expression.cpp @@ -675,6 +675,20 @@ const auto& errorCompoundExpression() { return signature; } +const auto& featureStateCompoundExpression() { + static auto signature = detail::makeSignature("feature-state", [](const EvaluationContext& params, const std::string& key) -> Result<Value> { + mbgl::Value state; + if (params.featureState) { + auto it = params.featureState->find(key); + if (it != params.featureState->end()) { + state = mbgl::Value(it->second); + } + } + return toExpressionValue(state); + }); + return signature; +} + // Legacy Filters const auto& filterEqualsCompoundExpression() { static auto signature = detail::makeSignature("filter-==", [](const EvaluationContext& params, const std::string& key, const Value &lhs) -> Result<bool> { @@ -921,6 +935,7 @@ MAPBOX_ETERNAL_CONSTEXPR const auto compoundExpressionRegistry = mapbox::eternal { "concat", concatCompoundExpression }, { "resolved-locale", resolvedLocaleCompoundExpression }, { "error", errorCompoundExpression }, + { "feature-state", featureStateCompoundExpression }, // Legacy Filters { "filter-==", filterEqualsCompoundExpression }, { "filter-id-==", filterIdEqualsCompoundExpression }, |