1 files changed, 111 insertions, 0 deletions
diff --git a/platform/darwin/src/MGLStyleAttribute.mm b/platform/darwin/src/MGLStyleAttribute.mm
new file mode 100644
index 0000000000..32c0f4e71e
--- /dev/null
+++ b/platform/darwin/src/MGLStyleAttribute.mm
@@ -0,0 +1,111 @@
+#import "MGLStyleAttribute.hpp"
+
+#import "MGLStyleAttributeValue_Private.hpp"
+#import "MGLStyleAttributeFunction_Private.hpp"
+
+@interface MGLStyleAttribute()
+@end
+
+@implementation MGLStyleAttribute
+
++ (id <MGLStyleAttributeValue>)mbgl_colorPropertyValueWith:(mbgl::style::PropertyValue<mbgl::Color>)property
+{
+    if (property.isConstant()) {
+        return [MGLColor mbgl_colorWithColor:property.asConstant()];
+    } else if (property.isFunction()) {
+        return [MGLStyleAttributeFunction functionWithColorPropertyValue:property.asFunction()];
+    } else {
+        return nil;
+    }
+}
+
++ (id <MGLStyleAttributeValue>)mbgl_numberPropertyValueWith:(mbgl::style::PropertyValue<float>)property
+{
+    if (property.isConstant()) {
+        return @(property.asConstant());
+    } else if (property.isFunction()) {
+        return [MGLStyleAttributeFunction functionWithNumberPropertyValue:property.asFunction()];
+    } else {
+        return nil;
+    }
+}
+
++ (id<MGLStyleAttributeValue>)mbgl_boolPropertyValueWith:(mbgl::style::PropertyValue<bool>)property
+{
+    if (property.isConstant()) {
+        return @(property.asConstant());
+    } else if (property.isFunction()) {
+        return [MGLStyleAttributeFunction functionWithBoolPropertyValue:property.asFunction()];
+    } else {
+        return nil;
+    }
+}
+
++ (id<MGLStyleAttributeValue>)mbgl_stringPropertyValueWith:(mbgl::style::PropertyValue<std::string>)property
+{
+    if (property.isConstant()) {
+        return @(property.asConstant().c_str());
+    } else if (property.isFunction()) {
+        return [MGLStyleAttributeFunction functionWithStringPropertyValue:property.asFunction()];
+    } else {
+        return nil;
+    }
+}
+
++ (id<MGLStyleAttributeValue>)mbgl_offsetPropertyValueWith:(mbgl::style::PropertyValue<std::array<float, 2> >)property
+{
+    if (property.isConstant()) {
+        auto offset = property.asConstant();
+        return @[@(offset[0]), @(offset[1])];
+    } else if (property.isFunction()) {
+        return [MGLStyleAttributeFunction functionWithOffsetPropertyValue:property.asFunction()];
+    } else {
+        return nil;
+    }
+}
+
++ (id<MGLStyleAttributeValue>)mbgl_paddingPropertyValueWith:(mbgl::style::PropertyValue<std::array<float, 4> >)property
+{
+    if (property.isConstant()) {
+        auto padding = property.asConstant();
+        return @[@(padding[0]), @(padding[1]), @(padding[2]), @(padding[3])];
+    } else if (property.isFunction()) {
+        return [MGLStyleAttributeFunction functionWithPaddingPropertyValue:property.asFunction()];
+    } else {
+        return nil;
+    }
+}
+
++ (id<MGLStyleAttributeValue>)mbgl_stringArrayPropertyValueWith:(mbgl::style::PropertyValue<std::vector<std::string> >)property
+{
+    if (property.isConstant()) {
+        auto strings = property.asConstant();
+        NSMutableArray *convertedStrings = [[NSMutableArray alloc] initWithCapacity:strings.size()];
+        for (auto string : strings) {
+            [convertedStrings addObject:@(string.c_str())];
+        }
+        return convertedStrings;
+    } else if (property.isFunction()) {
+        return [MGLStyleAttributeFunction functionWithStringArrayPropertyValue:property.asFunction()];
+    } else {
+        return nil;
+    }
+}
+
++ (id<MGLStyleAttributeValue>)mbgl_numberArrayPropertyValueWith:(mbgl::style::PropertyValue<std::vector<float> >)property
+{
+    if (property.isConstant()) {
+        auto numbers = property.asConstant();
+        NSMutableArray *convertedNumbers = [NSMutableArray arrayWithCapacity:numbers.size()];
+        for (auto number : numbers) {
+            [convertedNumbers addObject:@(number)];
+        }
+        return convertedNumbers;
+    } else if (property.isFunction()) {
+        return [MGLStyleAttributeFunction functionWithNumberArrayPropertyValue:property.asFunction()];
+    } else {
+        return nil;
+    }
+}
+
+@end