Remove images that are not visible from the loading queue, prepare for inline images

1 files changed, 12 insertions, 0 deletions

diff --git a/include/MessageQueue.hpp b/include/MessageQueue.hpp
index 7c34d51..3f38ca2 100644
--- a/include/MessageQueue.hpp
+++ b/include/MessageQueue.hpp
@@ -4,6 +4,7 @@
 #include <mutex>
 #include <condition_variable>
 #include <optional>
+#include <functional>
 
 namespace QuickMedia {
     template <typename T>
@@ -55,6 +56,17 @@ namespace QuickMedia {
             std::unique_lock<std::mutex> lock(mutex);
             running = true;
         }
+
+        // Returns true from |callback| to remove the element
+        void erase_if(std::function<bool(T&)> callback) {
+            std::unique_lock<std::mutex> lock(mutex);
+            for(auto it = data_queue.begin(); it != data_queue.end();) {
+                if(callback(*it))
+                    it = data_queue.erase(it);
+                else
+                    ++it;
+            }
+        }
     private:
         std::deque<T> data_queue;
         std::mutex mutex;