Move JNI bindings code from mapbox-gl-native to this repo. (#301)

MapboxGLAndroidSDK/src/cpp/style/formatted.cpp

@@ -0,0 +1,54 @@
+#include "formatted.hpp"
+#include "formatted_section.hpp"
+#include "../conversion/conversion.hpp"
+#include "../conversion/constant.hpp"
+
+namespace mbgl {
+namespace android {
+
+void Formatted::registerNative(jni::JNIEnv& env) {
+    jni::Class<Formatted>::Singleton(env);
+}
+
+jni::Local<jni::Object<Formatted>> Formatted::New(jni::JNIEnv& env, const style::expression::Formatted& value) {
+    static auto& formatted = jni::Class<Formatted>::Singleton(env);
+    static auto formattedConstructor = formatted.GetConstructor<jni::Array<jni::Object<FormattedSection>>>(env);
+    static auto& formattedSectionClass = jni::Class<FormattedSection>::Singleton(env);
+
+    auto sections = jni::Array<jni::Object<FormattedSection>>::New(env, value.sections.size());
+    for (std::size_t i = 0; i < value.sections.size(); i++) {
+        auto section = value.sections.at(i);
+        auto text = jni::Make<jni::String>(env, section.text);
+        static auto formattedSectionConstructor = formattedSectionClass.GetConstructor<jni::String>(env);
+        auto formattedSection = formattedSectionClass.New(env, formattedSectionConstructor, text);
+
+        if (section.fontScale) {
+            double fontScale = section.fontScale.value();
+            static auto method = formattedSectionClass.GetMethod<void (jni::Number)>(env, "setFontScale");
+            formattedSection.Call(env, method, jni::Box(env, fontScale));
+        }
+
+        if (section.fontStack) {
+            auto fontStack = jni::Array<jni::String>::New(env, section.fontStack.value().size());
+            for (std::size_t j = 0; j < section.fontStack.value().size(); j++) {
+                fontStack.Set(env, j, jni::Make<jni::String>(env, section.fontStack.value().at(j)));
+            }
+            static auto method = formattedSectionClass.GetMethod<void (jni::Array<jni::String>)>(env, "setFontStack");
+            formattedSection.Call(env, method, fontStack);
+        }
+
+        if (section.textColor) {
+            using namespace mbgl::android::conversion;
+            auto textColor = std::move(*convert<jni::Local<jni::Object<>>>(env, *section.textColor));
+            static auto method = formattedSectionClass.GetMethod<void (jni::Object<>)>(env, "setTextColor");
+            formattedSection.Call(env, method, textColor);
+        }
+
+        sections.Set(env, i, formattedSection);
+    }
+
+    return formatted.New(env, formattedConstructor, sections);
+}
+
+} // namespace android
+} // namespace mbgl