1 files changed, 119 insertions, 0 deletions
diff --git a/src/mbgl/map/source_info.cpp b/src/mbgl/map/source_info.cpp
new file mode 100644
index 0000000000..b8ab84b550
--- /dev/null
+++ b/src/mbgl/map/source_info.cpp
@@ -0,0 +1,119 @@
+#include <mbgl/map/source_info.hpp>
+#include <mbgl/util/mapbox.hpp>
+#include <mbgl/util/string.hpp>
+#include <mbgl/util/token.hpp>
+
+namespace mbgl {
+
+namespace {
+
+void parse(const rapidjson::Value& value, std::vector<std::string>& target, const char* name) {
+    if (!value.HasMember(name)) {
+        return;
+    }
+
+    const rapidjson::Value& property = value[name];
+    if (!property.IsArray()) {
+        return;
+    }
+
+    for (rapidjson::SizeType i = 0; i < property.Size(); i++) {
+        if (!property[i].IsString()) {
+            return;
+        }
+    }
+
+    for (rapidjson::SizeType i = 0; i < property.Size(); i++) {
+        target.emplace_back(std::string(property[i].GetString(), property[i].GetStringLength()));
+    }
+}
+
+void parse(const rapidjson::Value& value, std::string& target, const char* name) {
+    if (!value.HasMember(name)) {
+        return;
+    }
+
+    const rapidjson::Value& property = value[name];
+    if (!property.IsString()) {
+        return;
+    }
+
+    target = { property.GetString(), property.GetStringLength() };
+}
+
+void parse(const rapidjson::Value& value, uint16_t& target, const char* name) {
+    if (!value.HasMember(name)) {
+        return;
+    }
+
+    const rapidjson::Value& property = value[name];
+    if (!property.IsUint()) {
+        return;
+    }
+
+    unsigned int uint = property.GetUint();
+    if (uint > std::numeric_limits<uint16_t>::max()) {
+        return;
+    }
+
+    target = uint;
+}
+
+template <size_t N>
+void parse(const rapidjson::Value& value, std::array<float, N>& target, const char* name) {
+    if (!value.HasMember(name)) {
+        return;
+    }
+
+    const rapidjson::Value& property = value[name];
+    if (!property.IsArray() || property.Size() != N) {
+        return;
+    }
+
+    for (rapidjson::SizeType i = 0; i < property.Size(); i++) {
+        if (!property[i].IsNumber()) {
+            return;
+        }
+    }
+
+    for (rapidjson::SizeType i = 0; i < property.Size(); i++) {
+        target[i] = property[i].GetDouble();
+    }
+}
+
+} // end namespace
+
+void SourceInfo::parseTileJSONProperties(const rapidjson::Value& value) {
+    parse(value, tiles, "tiles");
+    parse(value, min_zoom, "minzoom");
+    parse(value, max_zoom, "maxzoom");
+    parse(value, attribution, "attribution");
+    parse(value, center, "center");
+    parse(value, bounds, "bounds");
+}
+
+std::string SourceInfo::tileURL(const TileID& id, float pixelRatio) const {
+    std::string result = tiles.at(0);
+    result = util::mapbox::normalizeTileURL(result, url, type);
+    result = util::replaceTokens(result, [&](const std::string& token) -> std::string {
+        if (token == "z") {
+            return util::toString(std::min(id.z, static_cast<int8_t>(max_zoom)));
+        } else if (token == "x") {
+            return util::toString(id.x);
+        } else if (token == "y") {
+            return util::toString(id.y);
+        } else if (token == "prefix") {
+            std::string prefix{ 2 };
+            prefix[0] = "0123456789abcdef"[id.x % 16];
+            prefix[1] = "0123456789abcdef"[id.y % 16];
+            return prefix;
+        } else if (token == "ratio") {
+            return pixelRatio > 1.0 ? "@2x" : "";
+        } else {
+            return "";
+        }
+    });
+    return result;
+}
+
+} // namespace mbgl