[core] remove SourceInfo dependency from *TileData

1 files changed, 24 insertions, 0 deletions

diff --git a/src/mbgl/util/url.cpp b/src/mbgl/util/url.cpp
index 07a226414c..1bd9f410fe 100644
--- a/src/mbgl/util/url.cpp
+++ b/src/mbgl/util/url.cpp
@@ -1,4 +1,7 @@
 #include <mbgl/util/url.hpp>
+#include <mbgl/util/token.hpp>
+#include <mbgl/util/string.hpp>
+#include <mbgl/map/tile_id.hpp>
 
 #include <cctype>
 #include <iomanip>
@@ -47,6 +50,27 @@ std::string percentDecode(const std::string& input) {
     return decoded;
 }
 
+std::string templateTileURL(const std::string& url, const TileID& id, float pixelRatio) {
+    return util::replaceTokens(url, [&](const std::string& token) -> std::string {
+        if (token == "z") {
+            return util::toString(id.sourceZ);
+        } 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 "";
+        }
+    });
+}
+
 namespace {
 const std::string assetProtocol = "asset://";
 }