Completion: add complete_buffername completer

src/completion.cc

@@ -1,5 +1,6 @@
 #include "completion.hh"
 
+#include "buffer_manager.hh"
 #include "utils.hh"
 
 #include <dirent.h>
@@ -33,4 +34,18 @@ CandidateList complete_filename(const std::string& prefix,
     return result;
 }
 
+CandidateList complete_buffername(const std::string& prefix,
+                                size_t cursor_pos)
+{
+    std::string real_prefix = prefix.substr(0, cursor_pos);
+    CandidateList result;
+    for (auto& buffer : BufferManager::instance())
+    {
+        if (buffer.name().substr(0, real_prefix.length()) == real_prefix)
+            result.push_back(buffer.name());
+    }
+    return result;
+}
+
+
 }

src/completion.hh

@@ -25,5 +25,8 @@ struct Completions
 CandidateList complete_filename(const std::string& prefix,
                                 size_t cursor_pos = std::string::npos);
 
+CandidateList complete_buffername(const std::string& prefix,
+                                  size_t cursor_pos = std::string::npos);
+
 }
 #endif // completion_hh_INCLUDED

src/main.cc

@@ -402,7 +402,8 @@ int main(int argc, char* argv[])
     command_manager.register_command(std::vector<std::string>{ "q", "quit" }, quit);
     command_manager.register_command(std::vector<std::string>{ "w", "write" }, write_buffer,
                                      PerArgumentCommandCompleter{ complete_filename });
-    command_manager.register_command(std::vector<std::string>{ "b", "buffer" }, show_buffer);
+    command_manager.register_command(std::vector<std::string>{ "b", "buffer" }, show_buffer,
+                                     PerArgumentCommandCompleter { complete_buffername });
 
     try
     {