Add String Range::content() const

src/editor.cc

@@ -119,7 +119,7 @@ std::vector<String> Editor::selections_content() const
 {
     std::vector<String> contents;
     for (auto& sel : m_selections)
-        contents.push_back(m_buffer->string(sel.begin(), sel.end()));
+        contents.push_back(sel.content());
     return contents;
 }
 

src/selection.cc

@@ -24,6 +24,11 @@ BufferIterator Range::end() const
     return utf8::next(std::max(m_first, m_last));
 }
 
+String Range::content() const
+{
+    return m_first.buffer().string(begin(), end());
+}
+
 void Range::check_invariant() const
 {
 #ifdef KAK_DEBUG

src/selection.hh

@@ -31,6 +31,8 @@ public:
     // returns max(first, last) + 1
     BufferIterator end() const;
 
+    String content() const;
+
     void check_invariant() const;
 private:
     BufferIterator m_first;