DynamicBufferIterator: add and use in Selections

DynamicBufferIterator are a new type of BufferIterators that
automatically update themselves when their buffer is modified.

Selections now uses this type of iterators instead of plain ones

1 files changed, 35 insertions, 0 deletions

diff --git a/src/dynamic_buffer_iterator.hh b/src/dynamic_buffer_iterator.hh
new file mode 100644
index 00000000..17e74485
--- /dev/null
+++ b/src/dynamic_buffer_iterator.hh
@@ -0,0 +1,35 @@
+#ifndef dynamic_buffer_iterator_hh_INCLUDED
+#define dynamic_buffer_iterator_hh_INCLUDED
+
+#include "buffer.hh"
+
+namespace Kakoune
+{
+
+class DynamicBufferIterator : public BufferIterator,
+                              public BufferModificationListener
+{
+public:
+    DynamicBufferIterator() : BufferIterator() {}
+    DynamicBufferIterator(const Buffer& buffer, BufferPos position);
+    DynamicBufferIterator(const BufferIterator& other);
+    DynamicBufferIterator(const DynamicBufferIterator& other)
+        : BufferIterator(other) { register_ifp(); }
+
+    DynamicBufferIterator(DynamicBufferIterator&& other);
+    DynamicBufferIterator& operator=(const BufferIterator& other);
+    DynamicBufferIterator& operator=(const DynamicBufferIterator& other)
+    { return this->operator= (static_cast<const BufferIterator&>(other)); }
+    ~DynamicBufferIterator();
+
+   void on_modification(const BufferModification& modification);
+
+private:
+   void register_ifp();
+   void unregister_ifn();
+};
+
+
+}
+
+#endif // dynamic_buffer_iterator_hh_INCLUDED