[core] Add style::Source::setVolatile()/isVolatile() API

2 files changed, 15 insertions, 1 deletions

diff --git a/src/mbgl/style/source.cpp b/src/mbgl/style/source.cpp
index 42ad367d66..b2a9473fe6 100644
--- a/src/mbgl/style/source.cpp
+++ b/src/mbgl/style/source.cpp
@@ -27,6 +27,18 @@ optional<std::string> Source::getAttribution() const {
     return baseImpl->getAttribution();
 }
 
+bool Source::isVolatile() const noexcept {
+    return baseImpl->isVolatile();
+}
+
+void Source::setVolatile(bool set) noexcept {
+    if (isVolatile() == set) return;
+    auto newImpl = createMutable();
+    newImpl->setVolatile(set);
+    baseImpl = std::move(newImpl);
+    observer->onSourceChanged(*this);
+}
+
 void Source::setObserver(SourceObserver* observer_) {
     observer = observer_ ? observer_ : &nullObserver;
 }
diff --git a/src/mbgl/style/source_impl.hpp b/src/mbgl/style/source_impl.hpp
index b16b763766..87a30dcf95 100644
--- a/src/mbgl/style/source_impl.hpp
+++ b/src/mbgl/style/source_impl.hpp
@@ -1,7 +1,6 @@
 #pragma once
 
 #include <mbgl/style/source.hpp>
-#include <mbgl/util/noncopyable.hpp>
 
 #include <string>
 
@@ -27,6 +26,8 @@ public:
     void setMaxOverscaleFactorForParentTiles(optional<uint8_t> overscaleFactor) noexcept;
     optional<uint8_t> getMaxOverscaleFactorForParentTiles() const noexcept;
 
+    bool isVolatile() const { return volatileFlag; }
+    void setVolatile(bool set) { volatileFlag = set; }
     const SourceType type;
     const std::string id;
 
@@ -34,6 +35,7 @@ protected:
     optional<uint8_t> prefetchZoomDelta;
     optional<uint8_t> maxOverscaleFactor;
     Duration minimumTileUpdateInterval{Duration::zero()};
+    bool volatileFlag = false;
 
     Impl(SourceType, std::string);
     Impl(const Impl&) = default;