[core] Add layer before notifying observer

jfirebaugh · jfirebaugh · commit cca16b459f00 · 2017-10-25T08:28:56.000-07:00
diff --git a/src/mbgl/style/style_impl.cpp b/src/mbgl/style/style_impl.cpp
@@ -204,9 +204,10 @@ Layer* Style::Impl::addLayer(std::unique_ptr<Layer> layer, optional<std::string>
     }
 
     layer->setObserver(this);
+    Layer* result = layers.add(std::move(layer), before);
     observer->onUpdate();
 
-    return layers.add(std::move(layer), before);
+    return result;
 }
 
 std::unique_ptr<Layer> Style::Impl::removeLayer(const std::string& id) {

Original file line number	Diff line number	Diff line change
`@@ -204,9 +204,10 @@ Layer* Style::Impl::addLayer(std::unique_ptr<Layer> layer, optional<std::string>`
`204`	`204`	`}`
`205`	`205`
`206`	`206`	`layer->setObserver(this);`
	`207`	`+ Layer* result = layers.add(std::move(layer), before);`
`207`	`208`	`observer->onUpdate();`
`208`	`209`
`209`		`- return layers.add(std::move(layer), before);`
	`210`	`+ return result;`
`210`	`211`	`}`
`211`	`212`
`212`	`213`	`std::unique_ptr<Layer> Style::Impl::removeLayer(const std::string& id) {`