[core] Introduce shared base class for VectorSource and RasterSource

src/mbgl/style/sources/raster_source.cpp

@@ -8,7 +8,7 @@ RasterSource::RasterSource(std::string id_,
                            std::string url_,
                            uint16_t tileSize_,
                            std::unique_ptr<Tileset>&& tileset_)
-    : Source(SourceType::Raster, std::move(id_), std::move(url_), tileSize_, std::move(tileset_)) {
+    : TileSource(SourceType::Raster, std::move(id_), std::move(url_), tileSize_, std::move(tileset_)) {
 }
 
 std::unique_ptr<Tile> RasterSource::createTile(const OverscaledTileID& tileID,

src/mbgl/style/sources/raster_source.hpp

@@ -1,11 +1,11 @@
 #pragma once
 
-#include <mbgl/style/source.hpp>
+#include <mbgl/style/tile_source.hpp>
 
 namespace mbgl {
 namespace style {
 
-class RasterSource : public Source {
+class RasterSource : public TileSource {
 public:
     RasterSource(std::string id,
                  std::string url,

src/mbgl/style/sources/vector_source.cpp

@@ -7,7 +7,7 @@ namespace style {
 VectorSource::VectorSource(std::string id_,
                            std::string url_,
                            std::unique_ptr<Tileset>&& tileset_)
-    : Source(SourceType::Vector, std::move(id_), std::move(url_), util::tileSize, std::move(tileset_)) {
+    : TileSource(SourceType::Vector, std::move(id_), std::move(url_), util::tileSize, std::move(tileset_)) {
 }
 
 std::unique_ptr<Tile> VectorSource::createTile(const OverscaledTileID& tileID,

src/mbgl/style/sources/vector_source.hpp

@@ -1,11 +1,11 @@
 #pragma once
 
-#include <mbgl/style/source.hpp>
+#include <mbgl/style/tile_source.hpp>
 
 namespace mbgl {
 namespace style {
 
-class VectorSource : public Source {
+class VectorSource : public TileSource {
 public:
     VectorSource(std::string id,
                  std::string url,

src/mbgl/style/tile_source.cpp

@@ -0,0 +1,15 @@
+#include <mbgl/style/tile_source.hpp>
+
+namespace mbgl {
+namespace style {
+
+TileSource::TileSource(SourceType type_,
+                       std::string id_,
+                       std::string url_,
+                       uint16_t tileSize_,
+                       std::unique_ptr<Tileset>&& tileset_)
+    : Source(type_, std::move(id_), std::move(url_), tileSize_, std::move(tileset_)) {
+}
+
+} // namespace style
+} // namespace mbgl

src/mbgl/style/tile_source.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <mbgl/style/source.hpp>
+
+namespace mbgl {
+namespace style {
+
+/*
+   Shared implementation for VectorSource and RasterSource. Should eventually
+   be refactored to use composition rather than inheritance.
+*/
+class TileSource : public Source {
+public:
+    TileSource(SourceType,
+               std::string id,
+               std::string url,
+               uint16_t tileSize,
+               std::unique_ptr<Tileset>&&);
+};
+
+} // namespace style
+} // namespace mbgl