diff --git a/src/api.cc b/src/api.cc
index b1ac39b..fa93820 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -205,8 +205,7 @@ void libjuci::IterToWordEnd(Gtk::TextIter &iter) {
 }
 
 Glib::RefPtr<Gtk::TextBuffer> libjuci::BufferFromNotebook() {
-  return Glib::RefPtr<Gtk::TextBuffer>(PluginApi::notebook
-                                       ->CurrentSourceView()->get_buffer());
+  return Glib::RefPtr<Gtk::TextBuffer>(PluginApi::notebook->get_current_view()->get_buffer());
 }
 
 Gtk::TextIter libjuci::IterFromNotebook() {
diff --git a/src/config.cc b/src/config.cc
index 8671110..a75b078 100644
--- a/src/config.cc
+++ b/src/config.cc
@@ -1,11 +1,9 @@
 #include "singletons.h"
 #include "config.h"
 #include "logging.h"
-#include <fstream>
-#include <string>
-#include <vector>
 #include <exception>
 #include "files.h"
+#include "sourcefile.h"
 
 MainConfig::MainConfig() {
   find_or_create_config_files();
@@ -22,12 +20,9 @@ void MainConfig::find_or_create_config_files() {
   for (auto &file : files) {
     auto path = boost::filesystem::path(Singleton::config_dir() + file);
     if (!boost::filesystem::is_regular_file(path)) {
-      std::ofstream output;
-      output.open(path.string());
-      if (file == "config.json") output << configjson;
-      if (file == "plugins.py") output << pluginspy;
-      if (file == "menu.xml") output << menuxml;
-      output.close();
+      if (file == "config.json") juci::filesystem::save(path, configjson);
+      if (file == "plugins.py") juci::filesystem::save(path, pluginspy);
+      if (file == "menu.xml") juci::filesystem::save(path, menuxml);
     }
   }
 }
@@ -39,41 +34,28 @@ void MainConfig::GenerateSource() {
   auto source_json = cfg.get_child("source");
   auto syntax_json = source_json.get_child("syntax");
   auto colors_json = source_json.get_child("colors");
-  auto extensions_json = source_json.get_child("extensions");
   auto visual_json = source_json.get_child("visual");
   for (auto &i : visual_json) {
-    if (i.first == "background") {
+    if (i.first == "background")
 	     source_cfg->background = i.second.get_value<std::string>();
-    }
-    else if (i.first == "background_selected") {
+    else if (i.first == "background_selected")
        source_cfg->background_selected = i.second.get_value<std::string>();
-    }
-    else if (i.first == "background_tooltips") {
+    else if (i.first == "background_tooltips")
 	     source_cfg->background_tooltips = i.second.get_value<std::string>();
-    }
-    else if (i.first == "show_line_numbers") {
+    else if (i.first == "show_line_numbers")
       source_cfg->show_line_numbers = i.second.get_value<std::string>() == "1" ? true : false;
-    }
-    else if (i.first == "highlight_current_line") {
+    else if (i.first == "highlight_current_line")
       source_cfg->highlight_current_line = i.second.get_value<std::string>() == "1" ? true : false;
-    }
-    else if (i.first == "font") {
+    else if (i.first == "font")
       source_cfg->font = i.second.get_value<std::string>();
-    }
   }
   source_cfg->tab_size = source_json.get<unsigned>("tab_size");
-  for (unsigned c = 0; c < source_cfg->tab_size; c++) {
+  for (unsigned c = 0; c < source_cfg->tab_size; c++)
     source_cfg->tab+=" ";
-  }
-  for (auto &i : colors_json) {
+  for (auto &i : colors_json)
     source_cfg->tags[i.first]=i.second.get_value<std::string>();
-  }
-  for (auto &i : syntax_json) {
+  for (auto &i : syntax_json)
     source_cfg->types[i.first]=i.second.get_value<std::string>();
-  }
-  for (auto &i : extensions_json) {
-    source_cfg->extensions.emplace_back(i.second.get_value<std::string>());
-  }
   DEBUG("Source cfg fetched");
 }
 
@@ -82,12 +64,10 @@ void MainConfig::GenerateTerminalCommands() {
   boost::property_tree::ptree source_json = cfg.get_child("project");
   boost::property_tree::ptree compile_commands_json = source_json.get_child("compile_commands");
   boost::property_tree::ptree run_commands_json = source_json.get_child("run_commands");
-  for (auto &i : compile_commands_json) {
+  for (auto &i : compile_commands_json)
     terminal_cfg->compile_commands.emplace_back(i.second.get_value<std::string>());
-  }
-  for (auto &i : run_commands_json) {
+  for (auto &i : run_commands_json)
     terminal_cfg->run_command=(i.second.get_value<std::string>()); //TODO: run_commands array->one run_command?
-  }
 }
 
 void MainConfig::GenerateKeybindings() {
@@ -97,12 +77,7 @@ void MainConfig::GenerateKeybindings() {
     std::cerr << "menu.xml not found" << std::endl;
     throw;
   }
-  std::ifstream input(path.string());
-  std::string line;
-  if (input.is_open()) {
-    while (getline(input, line))
-      menu->ui += line;
-  }
+  menu->ui = juci::filesystem::open(path);
   boost::property_tree::ptree keys_json = cfg.get_child("keybindings");
   for (auto &i : keys_json) {
     auto key=i.second.get_value<std::string>();
@@ -118,8 +93,8 @@ void MainConfig::GenerateDirectoryFilter() {
   boost::property_tree::ptree ignore_json = dir_json.get_child("ignore");
   boost::property_tree::ptree except_json = dir_json.get_child("exceptions");
   for ( auto &i : except_json )
-    dir_cfg->AddException(i.second.get_value<std::string>());
+    dir_cfg->exceptions.emplace_back(i.second.get_value<std::string>());
   for ( auto &i : ignore_json )
-    dir_cfg->AddIgnore(i.second.get_value<std::string>());
+    dir_cfg->ignored.emplace_back(i.second.get_value<std::string>());
   DEBUG("Directory filter fetched");
 }
diff --git a/src/directories.cc b/src/directories.cc
index 65a28dd..7c6505f 100644
--- a/src/directories.cc
+++ b/src/directories.cc
@@ -1,104 +1,109 @@
 #include "directories.h"
+#include "sourcefile.h"
 #include "logging.h"
 #include "singletons.h"
+#include <algorithm>
+#include "boost/algorithm/string.hpp"
 
-Directories::Controller::Controller() {
+namespace sigc {
+  SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE
+}
+
+Directories::Directories() {
   DEBUG("adding treeview to scrolledwindow");
-  m_ScrolledWindow.add(m_TreeView);
-  m_ScrolledWindow.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
+  add(tree_view);
+  set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
+  tree_store = Gtk::TreeStore::create(column_record);
+  tree_view.set_model(tree_store);
+  tree_view.append_column("", column_record.name);
+  tree_store->set_sort_column(0, Gtk::SortType::SORT_ASCENDING);
+  
+  tree_view.signal_row_activated().connect([this](const Gtk::TreeModel::Path& path, Gtk::TreeViewColumn* column){
+    INFO("Directory navigation");
+    auto iter = tree_store->get_iter(path);
+    if (iter) {
+      Gtk::TreeModel::Row row = *iter;
+      std::string upath = Glib::ustring(row[column_record.path]);
+      boost::filesystem::path fs_path(upath);
+      if (boost::filesystem::is_directory(fs_path)) {
+        tree_view.row_expanded(path) ? tree_view.collapse_row(path) : tree_view.expand_row(path, false);
+      } else {
+        std::stringstream sstm;
+        sstm << row[column_record.path];
+        if(on_row_activated)
+          on_row_activated(sstm.str());
+      }
+    }
+  });
 }
 
-void Directories::Controller::
-open_folder(const boost::filesystem::path& dir_path) {
+void Directories::open_folder(const boost::filesystem::path& dir_path) {
   INFO("Open folder");
-  m_refTreeModel = Gtk::TreeStore::create(view());
-  m_TreeView.set_model(m_refTreeModel);
-  m_TreeView.remove_all_columns();
-  DEBUG("Getting project name from CMakeLists.txt");
-  std::string project_name = GetCmakeVarValue(dir_path, "project");
-  m_TreeView.append_column(project_name, view().m_col_name);
-  int row_id = 0;
-  Gtk::TreeModel::Row row;
-  DEBUG("Listing directories");
-  list_dirs(dir_path, row, row_id);
-  DEBUG("Sorting directories");
-  m_refTreeModel->set_sort_column(0, Gtk::SortType::SORT_ASCENDING);
+  tree_store->clear();
+  tree_view.get_column(0)->set_title(get_cmakelists_variable(dir_path, "project"));
+  add_paths(dir_path, Gtk::TreeModel::Row(), 0);
   DEBUG("Folder opened");
 }
 
-bool Directories::Controller::IsIgnored(std::string path) {
+bool Directories::ignored(std::string path) {
   DEBUG("Checking if file-/directory is filtered");
   std::transform(path.begin(), path.end(), path.begin(), ::tolower);
-  if (Singleton::Config::directories()->IsException(path)) {
-    return false;
+  
+  for(std::string &i : Singleton::Config::directories()->exceptions) {
+    if(i == path)
+      return false;
   }
-  if (Singleton::Config::directories()->IsIgnored(path)) {
-    return true;
+  for(auto &i : Singleton::Config::directories()->ignored) {
+    if(path.find(i, 0) != std::string::npos)
+      return true;
   }
+  
   return false;
 }
-void Directories::Controller::
-list_dirs(const boost::filesystem::path& dir_path,
-          Gtk::TreeModel::Row &parent,
-          unsigned row_id) {
-  
+
+void Directories::add_paths(const boost::filesystem::path& dir_path, const Gtk::TreeModel::Row &parent, unsigned row_id) {
   boost::filesystem::directory_iterator end_itr;
   Gtk::TreeModel::Row child;
   Gtk::TreeModel::Row row;
   DEBUG("");
   // Fill the treeview
-  for ( boost::filesystem::directory_iterator itr( dir_path );
-        itr != end_itr;
-        ++itr ) {   
-    if (!IsIgnored(itr->path().filename().string())) {
+  for(boost::filesystem::directory_iterator itr(dir_path);itr != end_itr;++itr) {   
+    if (!ignored(itr->path().filename().string())) {
       if (boost::filesystem::is_directory(itr->status())) {
-        if (count(itr->path().string()) > count(dir_path.string())) {  // is child
-          child = *(m_refTreeModel->append(parent.children()));
+        if (boost::filesystem::canonical(itr->path()) > boost::filesystem::canonical(dir_path)) {  // is child
+          child = *(tree_store->append(parent.children()));
           std::string col_id("a"+itr->path().filename().string());
-          child[view().m_col_id] = col_id;
-          child[view().m_col_name] =  itr->path().filename().string();
-          child[view().m_col_path] = itr->path().string();
-          list_dirs(itr->path(), child, row_id);
+          child[column_record.id] = col_id;
+          child[column_record.name] =  itr->path().filename().string();
+          child[column_record.path] = itr->path().string();
+          add_paths(itr->path(), child, row_id);
         } else {
-          row = *(m_refTreeModel->append());
+          row = *(tree_store->append());
           std::string col_id("a"+itr->path().filename().string());
-          row[view().m_col_path] = itr->path().string();
-          row[view().m_col_id] = col_id;
-          row[view().m_col_name] =  itr->path().filename().string();
-          list_dirs(itr->path(), parent, row_id);
+          row[column_record.path] = itr->path().string();
+          row[column_record.id] = col_id;
+          row[column_record.name] =  itr->path().filename().string();
+          add_paths(itr->path(), parent, row_id);
         }
       } else {  // is a file
-        child = *(m_refTreeModel->append(parent.children()));
+        child = *(tree_store->append(parent.children()));
         std::string col_id("b"+itr->path().filename().string());
-        child[view().m_col_id] = col_id;
-        child[view().m_col_name] = itr->path().filename().string();
-        child[view().m_col_path] = itr->path().string();
+        child[column_record.id] = col_id;
+        child[column_record.name] = itr->path().filename().string();
+        child[column_record.path] = itr->path().string();
       }
     }
   }
 }
 
-int Directories::Controller::count(const std::string path) {
-  int count = 0;
-  for (size_t i = 0; i < path.size(); i++)
-    if (path[i] == '/')
-      count++;
-  return count;
-}
-
-std::string Directories::Controller::
-GetCmakeVarValue(const boost::filesystem::path& dir_path, std::string command_name) {
+std::string Directories::get_cmakelists_variable(const boost::filesystem::path& dir_path, std::string command_name) {
   INFO("fetches cmake variable value for: "+command_name);
   std::string project_name;
   std::string project_name_var;
   boost::filesystem::directory_iterator end_itr;
-  for (boost::filesystem::directory_iterator itr( dir_path );
-       itr != end_itr;
-       ++itr ) {
+  for (boost::filesystem::directory_iterator itr( dir_path );itr != end_itr;++itr ) {
     if (itr->path().filename().string() == "CMakeLists.txt") {
-      std::ifstream ifs(itr->path().string());
-      std::string line;
-      while (std::getline(ifs, line)) {
+      for (auto &line : juci::filesystem::lines(itr->path())) {
         if (line.find(command_name+"(", 0) != std::string::npos
             || line.find(command_name+" (", 0) != std::string::npos ) {
           size_t variable_start = line.find("{", 0);
@@ -133,8 +138,7 @@ GetCmakeVarValue(const boost::filesystem::path& dir_path, std::string command_na
           }
         }
       }
-      std::ifstream ifs2(itr->path().string());
-      while (std::getline(ifs2, line)) {
+      for (auto &line : juci::filesystem::lines(itr->path())) {
         if (line.find("set(", 0) != std::string::npos
             || line.find("set (", 0) != std::string::npos) {
           if( line.find(project_name_var, 0) != std::string::npos) {
@@ -155,25 +159,3 @@ GetCmakeVarValue(const boost::filesystem::path& dir_path, std::string command_na
   INFO("Couldn't find value in CMakeLists.txt");
   return "no project name";
 }
-
-void Directories::Config::AddIgnore(std::string filter) {
-  ignore_list_.push_back(filter);
-}
-
-void Directories::Config::AddException(std::string filter) {
-  exception_list_.push_back(filter);
-}
-
-bool Directories::Config::IsIgnored(std::string str) {
-  for ( auto &i : ignore_list() )
-    if (str.find(i, 0) != std::string::npos)
-      return true;
-  return false;
-}
-
-bool Directories::Config::IsException(std::string str) {
-  for ( std::string &i : exception_list() )
-    if (i == str)
-      return true;
-  return false;
-}
diff --git a/src/directories.h b/src/directories.h
index c6363c5..3391998 100644
--- a/src/directories.h
+++ b/src/directories.h
@@ -2,69 +2,42 @@
 #define JUCI_DIRECTORIES_H_
 
 #include <gtkmm.h>
-#include <glib.h>
+#include <vector>
+#include <string>
 #include "boost/filesystem.hpp"
-#include "boost/algorithm/string.hpp"
-#include <utility>
-#include <algorithm>
-#include <iostream>
-#include <fstream>
-
-namespace Directories {
 
+class Directories : public Gtk::ScrolledWindow {
+public:
   class Config {
   public:
-    std::vector<std::string> ignore_list() { return ignore_list_; }
-    std::vector<std::string> exception_list() { return exception_list_; }
-    void AddIgnore(std::string filter);
-    void AddException(std::string filter);
-    bool IsException(std::string path);
-    bool IsIgnored(std::string path);
-  private:
-    std::vector<std::string> ignore_list_;
-    std::vector<std::string> exception_list_;
+    std::vector<std::string> ignored;
+    std::vector<std::string> exceptions;
   };
-  class View : public Gtk::TreeModel::ColumnRecord {
+  
+  class ColumnRecord : public Gtk::TreeModel::ColumnRecord {
   public:
-    View() {
-      add(m_col_id);
-      add(m_col_name);
-      add(m_col_path);
+    ColumnRecord() {
+      add(id);
+      add(name);
+      add(path);
     }
-    Gtk::TreeModelColumn<Glib::ustring> m_col_id;
-    Gtk::TreeModelColumn<Glib::ustring> m_col_name;
-    Gtk::TreeModelColumn<Glib::ustring> m_col_path;
+    Gtk::TreeModelColumn<Glib::ustring> id;
+    Gtk::TreeModelColumn<Glib::ustring> name;
+    Gtk::TreeModelColumn<Glib::ustring> path;
   };
 
-  class Model { };
-
-  class Controller {
-  public:
-    Controller();
-    View& view() { return view_;}
-    Model& model() { return model_;}
-    Gtk::ScrolledWindow& widget() {return m_ScrolledWindow;}
-    void open_folder(const boost::filesystem::path& dir_path);
-    void list_dirs(const boost::filesystem::path& dir_path,
-                   Gtk::TreeModel::Row &row, unsigned depth);
-    std::string GetCmakeVarValue(const boost::filesystem::path& dir_path, std::string command_name);
-    int count(const std::string path);
-
-    // Child widgets:
-    Gtk::Box m_VBox;
-    Gtk::ScrolledWindow m_ScrolledWindow;
-    Gtk::TreeView m_TreeView;
-    Glib::RefPtr<Gtk::TreeStore> m_refTreeModel;
-    bool IsIgnored(std::string path);
-
-  private:
-    View view_;
-    Model model_;
-
-  protected:
-    void on_treeview_row_activated(const Gtk::TreeModel::Path& path,
-                                   Gtk::TreeViewColumn* column);
-  };
-}  // namespace Directories
+  Directories();
+  void open_folder(const boost::filesystem::path& dir_path);
+  std::string get_cmakelists_variable(const boost::filesystem::path& dir_path, std::string command_name);
+  
+  std::function<void(const std::string &file)> on_row_activated;
+  
+private:
+  void add_paths(const boost::filesystem::path& dir_path, const Gtk::TreeModel::Row &row, unsigned depth);
+  Gtk::TreeView tree_view;
+  Glib::RefPtr<Gtk::TreeStore> tree_store;
+  ColumnRecord column_record;
+  bool ignored(std::string path);
+};
 
 #endif  // JUCI_DIRECTORIES_H_
diff --git a/src/files.h b/src/files.h
index dde0b17..fa34cd7 100644
--- a/src/files.h
+++ b/src/files.h
@@ -155,3 +155,71 @@ const std::string pluginspy =
 "        juci.initPlugin(current_file) \n"
 "loadplugins() \n";
 
+const std::string snippetpy =
+"#!/usr/bin/python \n"
+"#snippet plugin \n"
+"import juci_to_python_api as juci, inspect \n"
+" \n"
+"def initPlugin(): \n"
+"    juci.addMenuElement(\"Snippet\") \n"
+"    juci.addSubMenuElement(\"SnippetMenu\", #name of parent menu \n"
+"                           \"Insert snippet\", #menu description \n"
+"                           \"insertSnippet()\", #function to execute \n"
+"                           inspect.getfile(inspect.currentframe()), #plugin path \n"
+"                           \"<control><alt>space\") \n"
+"snippets = {} \n"
+" \n"
+"snippets[\"for\"] = \"\"\"\ \n"
+"for(int i=0; i<v.size(); i++) { \n"
+"  // std::cout << v[i] << std::endl; \n"
+"  // Write code here \n"
+"} \n"
+"\"\"\" \n"
+" \n"
+"snippets[\"if\"] = \"\"\"\ \n"
+"if(true) { \n"
+"    // Write code here \n"
+"} \n"
+"\"\"\" \n"
+" \n"
+"snippets[\"ifelse\"] = \"\"\"\ \n"
+"if(false) { \n"
+"    // Write code here \n"
+"} else { \n"
+"    // Write code here \n"
+"} \n"
+"\"\"\" \n"
+" \n"
+"snippets[\"while\"] = \"\"\"\ \n"
+"while(condition) { \n"
+"    // Write code here \n"
+"} \n"
+"\"\"\" \n"
+" \n"
+"snippets[\"main\"] = \"\"\"\ \n"
+"int main(int argc, char *argv[]) { \n"
+"    //Do something \n"
+"} \n"
+"\"\"\" \n"
+" \n"
+"snippets[\"hello\"] = \"\"\"\ \n"
+"#include <iostream> \n"
+" \n"
+"int main(int argc, char *argv[]) { \n"
+"    std::cout << \"Hello, world! << std::endl; \n"
+"} \n"
+"\"\"\" \n"
+" \n"
+"def getSnippet(word):     \n"
+"    try: \n"
+"        output = snippets[word] \n"
+"    except KeyError: \n"
+"        output = word \n"
+"    return output \n"
+" \n"
+"def insertSnippet(): \n"
+"    theWord=juci.getWord() \n"
+"    output=getSnippet(theWord) \n"
+"    juci.replaceWord(output) \n";
+
+
diff --git a/src/juci.cc b/src/juci.cc
index a6326dc..629c22b 100644
--- a/src/juci.cc
+++ b/src/juci.cc
@@ -40,7 +40,7 @@ void Juci::on_activate() {
     window->directories.open_folder(directory);
   }
   for(auto &f: files)
-    window->notebook.open_file(f);
+    window->notebook.open(f);
 }
 
 int main(int argc, char *argv[]) {
diff --git a/src/juci.h b/src/juci.h
index 244c9ac..4ce2cb2 100644
--- a/src/juci.h
+++ b/src/juci.h
@@ -1,7 +1,6 @@
 #ifndef JUCI_JUCI_H_
 #define JUCI_JUCI_H_
 
-#include "config.h"
 #include "window.h"
 #include "logging.h"
 
@@ -13,7 +12,6 @@ public:
   void on_activate();
 
 private:
-  MainConfig main_config;
   std::unique_ptr<Window> window;
   std::string directory;
   std::vector<std::string> files;
diff --git a/src/menu.cc b/src/menu.cc
index d20b74d..7a040d3 100644
--- a/src/menu.cc
+++ b/src/menu.cc
@@ -7,7 +7,7 @@ Menu::Menu() : box(Gtk::ORIENTATION_VERTICAL) {
   action_group = Gtk::ActionGroup::create();
   ui_manager = Gtk::UIManager::create();
 
-  action_group->add(Gtk::Action::create("FileNew", "New File"));
+  action_group->add(Gtk::Action::create("FileMenu", "File"));
   action_group->add(Gtk::Action::create("EditMenu", "Edit"));
   action_group->add(Gtk::Action::create("WindowMenu", "_Window"));
   action_group->add(Gtk::Action::create("WindowSplitWindow", "Split window"), Gtk::AccelKey(key_map["split_window"]), [this]() {
@@ -25,10 +25,6 @@ Gtk::Widget& Menu::get_widget() {
   return *ui_manager->get_widget("/MenuBar");
 }
 
-Gtk::Menu& Menu::get_source_menu() {
-  return *(Gtk::Menu*)ui_manager->get_widget("/MenuBar/SourceMenu");
-}
-
 void Menu::build() {
   try {
     ui_manager->add_ui_from_string(ui);
diff --git a/src/menu.h b/src/menu.h
index 40e3cb3..9dcc6eb 100644
--- a/src/menu.h
+++ b/src/menu.h
@@ -9,7 +9,6 @@ class Menu {
 public:
   Menu();
   Gtk::Widget& get_widget();
-  Gtk::Menu& get_source_menu();
   void build();
   
   Gtk::Box box;
diff --git a/src/notebook.cc b/src/notebook.cc
index aedd553..3c60ccb 100644
--- a/src/notebook.cc
+++ b/src/notebook.cc
@@ -1,8 +1,7 @@
-#include <fstream>
 #include "notebook.h"
 #include "logging.h"
+#include "sourcefile.h"
 #include "singletons.h"
-#include <iostream> //TODO: remove
 using namespace std; //TODO: remove
 
 namespace sigc {
@@ -10,92 +9,68 @@ namespace sigc {
 }
 
 Notebook::Notebook() : Gtk::Notebook() {
-  INFO("Create notebook");
   Gsv::init();
+}
 
-  auto menu=Singleton::menu();
-  INFO("Notebook create signal handlers");
-  menu->action_group->add(Gtk::Action::create("FileMenu", "File"));
-
-  menu->action_group->add(Gtk::Action::create("WindowCloseTab", "Close tab"), Gtk::AccelKey(menu->key_map["close_tab"]), [this]() {
-    close_current_page();
-  });
+int Notebook::size() {
+  return get_n_pages();
+}
 
-  menu->action_group->add(Gtk::Action::create("EditUndo", "Undo"), Gtk::AccelKey(menu->key_map["edit_undo"]), [this]() {
-	  INFO("On undo");
-    Glib::RefPtr<Gsv::UndoManager> undo_manager = CurrentSourceView()->get_source_buffer()->get_undo_manager();
-    if (Pages() != 0 && undo_manager->can_undo()) {
-      undo_manager->undo();
-    }
-    INFO("Done undo");
-	});
+Source::View* Notebook::get_view(int page) {
+  if(page>=size())
+    return nullptr;
+  return source_views.at(page).get();  
+}
 
-  menu->action_group->add(Gtk::Action::create("EditRedo", "Redo"), Gtk::AccelKey(menu->key_map["edit_redo"]), [this]() {
-    INFO("On Redo");
-    Glib::RefPtr<Gsv::UndoManager> undo_manager =
-    CurrentSourceView()->get_source_buffer()->get_undo_manager();
-    if (Pages() != 0 && undo_manager->can_redo()) {
-      undo_manager->redo();
-    }
-    INFO("Done Redo");
-  });
-  
-  menu->action_group->add(Gtk::Action::create("SourceGotoDeclaration", "Go to declaration"), Gtk::AccelKey(menu->key_map["source_goto_declaration"]), [this]() {
-    if(CurrentPage()!=-1) {
-      if(CurrentSourceView()->get_declaration_location) {
-        auto location=CurrentSourceView()->get_declaration_location();
-        if(location.first.size()>0) {
-          open_file(location.first);
-          CurrentSourceView()->get_buffer()->place_cursor(CurrentSourceView()->get_buffer()->get_iter_at_offset(location.second));
-          while(gtk_events_pending())
-            gtk_main_iteration();
-          CurrentSourceView()->scroll_to(CurrentSourceView()->get_buffer()->get_insert(), 0.0, 1.0, 0.5);
-        }
-      }
-    }
-  });
-  
-  menu->action_group->add(Gtk::Action::create("SourceGotoMethod", "Go to method"), Gtk::AccelKey(menu->key_map["source_goto_method"]), [this]() {
-    if(CurrentPage()!=-1) {
-      if(CurrentSourceView()->goto_method) {
-        CurrentSourceView()->goto_method();
-      }
-    }
-  });
+Source::View* Notebook::get_current_view() {
+  INFO("Getting sourceview");
+  if(get_current_page()==-1)
+    return nullptr;
+  return get_view(get_current_page());
 }
 
-void Notebook::open_file(std::string path) {
+void Notebook::open(std::string path) {
   INFO("Notebook open file");
   INFO("Notebook create page");
-  for(int c=0;c<Pages();c++) {
-    if(path==source_views.at(c)->view->file_path) {
+  for(int c=0;c<size();c++) {
+    if(path==get_view(c)->file_path) {
       set_current_page(c);
       return;
     }
   }
-  source_views.emplace_back(new Source(path, project_path));
+  
+  auto tmp_project_path=project_path;
+  if(tmp_project_path=="") {
+    tmp_project_path=boost::filesystem::path(path).parent_path().string();
+  }
+  auto language=Source::guess_language(path);
+  if(language && (language->get_id()=="chdr" || language->get_id()=="c" || language->get_id()=="cpp" || language->get_id()=="objc"))
+    source_views.emplace_back(new Source::ClangView(path, tmp_project_path));
+  else
+    source_views.emplace_back(new Source::GenericView(path, tmp_project_path, language));
+    
   scrolled_windows.emplace_back(new Gtk::ScrolledWindow());
   hboxes.emplace_back(new Gtk::HBox());
-  scrolled_windows.back()->add(*source_views.back()->view);
+  scrolled_windows.back()->add(*source_views.back());
   hboxes.back()->pack_start(*scrolled_windows.back(), true, true);
   
-  boost::filesystem::path file_path(source_views.back()->view->file_path);
+  boost::filesystem::path file_path(source_views.back()->file_path);
   std::string title=file_path.filename().string();
   append_page(*hboxes.back(), title);
   show_all_children();
-  set_current_page(Pages()-1);
-  set_focus_child(*source_views.back()->view);
-  CurrentSourceView()->get_buffer()->set_modified(false);
+  set_current_page(size()-1);
+  set_focus_child(*source_views.back());
+  get_current_view()->get_buffer()->set_modified(false);
   //Add star on tab label when the page is not saved:
-  auto source_view=CurrentSourceView();
-  CurrentSourceView()->get_buffer()->signal_modified_changed().connect([this, source_view]() {
+  auto source_view=get_current_view();
+  get_current_view()->get_buffer()->signal_modified_changed().connect([this, source_view]() {
     boost::filesystem::path file_path(source_view->file_path);
     std::string title=file_path.filename().string();
     if(source_view->get_buffer()->get_modified())
       title+="*";
     int page=-1;
-    for(int c=0;c<Pages();c++) {
-      if(source_views.at(c)->view.get()==source_view) {
+    for(int c=0;c<size();c++) {
+      if(get_view(c)==source_view) {
         page=c;
         break;
       }
@@ -105,14 +80,34 @@ void Notebook::open_file(std::string path) {
   });
 }
 
+bool Notebook::save(int page) {
+  if(page>=size())
+    return false;
+  auto view=get_view(page);
+  if (view->file_path != "" && view->get_buffer()->get_modified()) {
+    juci::filesystem::save(view->file_path, view->get_buffer()->get_text());
+    view->get_buffer()->set_modified(false);
+    Singleton::terminal()->print("File saved to: " +view->file_path+"\n");
+    return true;
+  }
+  return false;
+}
+
+bool Notebook::save_current() {
+  INFO("Notebook save current file");
+  if(get_current_page()==-1)
+    return false;
+  return save(get_current_page());
+}
+
 bool Notebook::close_current_page() {
   INFO("Notebook close page");
-  if (Pages() != 0) {
-    if(CurrentSourceView()->get_buffer()->get_modified()){
+  if (size() != 0) {
+    if(get_current_view()->get_buffer()->get_modified()){
       if(!save_modified_dialog())
         return false;
     }
-    int page = CurrentPage();
+    int page = get_current_page();
     remove_page(page);
     source_views.erase(source_views.begin()+ page);
     scrolled_windows.erase(scrolled_windows.begin()+page);
@@ -121,26 +116,13 @@ bool Notebook::close_current_page() {
   return true;
 }
 
-Source::View* Notebook::CurrentSourceView() {
-  INFO("Getting sourceview");
-  return source_views.at(CurrentPage())->view.get();
-}
-
-int Notebook::CurrentPage() {
-  return get_current_page();
-}
-
-int Notebook::Pages() {
-  return get_n_pages();
-}
-
 bool Notebook::save_modified_dialog() {
-  INFO("Notebook::save_dialog");
+  INFO("Notebook::save_modified_dialog");
   Gtk::MessageDialog dialog((Gtk::Window&)(*get_toplevel()), "Save file!", false, Gtk::MESSAGE_QUESTION, Gtk::BUTTONS_YES_NO);
-  dialog.set_secondary_text("Do you want to save: " + CurrentSourceView()->file_path+" ?");
+  dialog.set_secondary_text("Do you want to save: " + get_current_view()->file_path+" ?");
   int result = dialog.run();
   if(result==Gtk::RESPONSE_YES) {
-    CurrentSourceView()->save();
+    save_current();
     return true;
   }
   else if(result==Gtk::RESPONSE_NO) {
diff --git a/src/notebook.h b/src/notebook.h
index 0f8f356..79fb9f9 100644
--- a/src/notebook.h
+++ b/src/notebook.h
@@ -3,29 +3,27 @@
 
 #include <iostream>
 #include "gtkmm.h"
-#include "entrybox.h"
 #include "source.h"
-#include "directories.h"
 #include <boost/algorithm/string/case_conv.hpp>
 #include <type_traits>
 #include <map>
 #include <sigc++/sigc++.h>
-#include "clangmm.h"
 
 class Notebook : public Gtk::Notebook {
 public:
   Notebook();
-  Source::View* CurrentSourceView();
-  int CurrentPage();
+  Source::View* get_view(int page);
+  int size();
+  Source::View* get_current_view();
   bool close_current_page();
-  void open_file(std::string filename);
-  int Pages();
+  void open(std::string filename);
+  bool save(int page);
+  bool save_current();
   std::string project_path;
       
-  std::vector<std::unique_ptr<Source> > source_views;
 private:
   bool save_modified_dialog();
-
+  std::vector<std::unique_ptr<Source::View> > source_views;
   std::vector<std::unique_ptr<Gtk::ScrolledWindow> > scrolled_windows;
   std::vector<std::unique_ptr<Gtk::HBox> > hboxes;
 };
diff --git a/src/source.cc b/src/source.cc
index f97c5b5..0df15fb 100644
--- a/src/source.cc
+++ b/src/source.cc
@@ -1,7 +1,6 @@
 #include "source.h"
 #include "sourcefile.h"
 #include <boost/property_tree/json_parser.hpp>
-#include <fstream>
 #include <boost/timer/timer.hpp>
 #include "logging.h"
 #include <algorithm>
@@ -16,14 +15,22 @@ namespace sigc {
   SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE
 }
 
-bool Source::Config::legal_extension(std::string e) const {
-  std::transform(e.begin(), e.end(),e.begin(), ::tolower);
-  if (find(extensions.begin(), extensions.end(), e) != extensions.end()) {
-    DEBUG("Legal extension");
-    return true;
+Glib::RefPtr<Gsv::Language> Source::guess_language(const std::string &file_path) {
+  auto language_manager=Gsv::LanguageManager::get_default();
+  bool result_uncertain = false;
+  auto content_type = Gio::content_type_guess(file_path, NULL, 0, result_uncertain);
+  if(result_uncertain) {
+    content_type.clear();
+  }
+  auto language=language_manager->guess_language(file_path, content_type);
+  if(!language) {
+    auto path=boost::filesystem::path(file_path);
+    auto filename=path.filename().string();
+    auto extension=path.extension();
+    if(filename=="CMakeLists.txt")
+      language=language_manager->get_language("cmake");
   }
-  DEBUG("Ilegal extension");
-  return false;
+  return language;
 }
 
 //////////////
@@ -34,13 +41,10 @@ file_path(file_path), project_path(project_path) {
   set_smart_home_end(Gsv::SMART_HOME_END_BEFORE);
   set_show_line_numbers(Singleton::Config::source()->show_line_numbers);
   set_highlight_current_line(Singleton::Config::source()->highlight_current_line);
-  sourcefile s(file_path);
   get_source_buffer()->get_undo_manager()->begin_not_undoable_action();
-  get_source_buffer()->set_text(s.get_content());
+  get_source_buffer()->set_text(juci::filesystem::open(file_path));
   get_source_buffer()->get_undo_manager()->end_not_undoable_action();
-  
-  get_buffer()->place_cursor(get_buffer()->get_iter_at_offset(0));
-    
+  get_buffer()->place_cursor(get_buffer()->get_iter_at_offset(0)); 
   search_settings = gtk_source_search_settings_new();
   gtk_source_search_settings_set_wrap_around(search_settings, true);
   search_context = gtk_source_search_context_new(get_source_buffer()->gobj(), search_settings);
@@ -56,20 +60,6 @@ file_path(file_path), project_path(project_path) {
   g_signal_connect(search_context, "notify::occurrences-count", G_CALLBACK(search_occurrences_updated), this);
 }
 
-bool Source::View::save() {
-  INFO("Source save file");
-  if (file_path != "" && get_buffer()->get_modified()) {
-    std::ofstream file;
-    file.open (file_path);
-    file << get_buffer()->get_text();
-    file.close();
-    get_buffer()->set_modified(false);
-    Singleton::terminal()->print("File saved to: " +file_path+"\n");
-    return true;
-  }
-  return false;
-}
-
 void Source::View::search_occurrences_updated(GtkWidget* widget, GParamSpec* property, gpointer data) {
   auto view=(Source::View*)data;
   if(view->update_search_occurrences)
@@ -241,7 +231,7 @@ bool Source::View::on_key_press_event(GdkEventKey* key) {
 /////////////////////
 //// GenericView ////
 /////////////////////
-Source::GenericView::GenericView(const std::string& file_path, const std::string& project_path) : View(file_path, project_path) {
+Source::GenericView::GenericView(const std::string& file_path, const std::string& project_path, Glib::RefPtr<Gsv::Language> language) : View(file_path, project_path) {
   auto style_scheme_manager=Gsv::StyleSchemeManager::get_default();
   //TODO: add?: style_scheme_manager->prepend_search_path("~/.juci/");
   auto scheme=style_scheme_manager->get_scheme("classic");
@@ -252,20 +242,6 @@ Source::GenericView::GenericView(const std::string& file_path, const std::string
       cout << "TODO, in progress: def:comment in scheme " << scheme->get_name() << " has color " << style->property_foreground() << endl;
   }
   
-  auto language_manager=Gsv::LanguageManager::get_default();
-  bool result_uncertain = false;
-  auto content_type = Gio::content_type_guess(file_path, get_buffer()->get_text(), result_uncertain);
-  if(result_uncertain) {
-    content_type.clear();
-  }
-  auto language=language_manager->guess_language(file_path, content_type);
-  if(!language) {
-    auto path=boost::filesystem::path(file_path);
-    auto filename=path.filename().string();
-    auto extension=path.extension();
-    if(filename=="CMakeLists.txt")
-      language=language_manager->get_language("cmake");
-  }
   if(language) {
     get_source_buffer()->set_language(language);
     Singleton::terminal()->print("Language for file "+file_path+" set to "+language->get_name()+".\n");
@@ -1038,18 +1014,3 @@ Source::ClangViewAutocomplete(file_path, project_path) {
     }
   };
 }
-
-////////////////
-//// Source ////
-////////////////
-
-Source::Source(const std::string& file_path, std::string project_path) {
-  if(project_path=="") {
-    project_path=boost::filesystem::path(file_path).parent_path().string();
-  }
-  if (Singleton::Config::source()->legal_extension(file_path.substr(file_path.find_last_of(".") + 1)))
-    view=std::unique_ptr<View>(new ClangView(file_path, project_path));
-  else
-    view=std::unique_ptr<View>(new GenericView(file_path, project_path));
-  INFO("Source Controller with childs constructed");
-}
diff --git a/src/source.h b/src/source.h
index af7f347..d695093 100644
--- a/src/source.h
+++ b/src/source.h
@@ -15,16 +15,15 @@
 #include "selectiondialog.h"
 #include <set>
 
-class Source {
-public:
+namespace Source {
+  Glib::RefPtr<Gsv::Language> guess_language(const std::string &file_path);
+  
   class Config {
   public:
-    bool legal_extension(std::string e) const ;
     unsigned tab_size;
     bool show_line_numbers, highlight_current_line;
     std::string tab, background, background_selected, background_tooltips, font;
     char tab_char=' ';
-    std::vector<std::string> extensions;
     std::unordered_map<std::string, std::string> tags, types;
   };  // class Config
 
@@ -50,8 +49,6 @@ public:
     View(const std::string& file_path, const std::string& project_path);
     ~View();
     
-    bool save();
-    
     void search_highlight(const std::string &text, bool case_sensitive, bool regex);
     std::function<void(int number)> update_search_occurrences;
     void search_forward();
@@ -82,7 +79,7 @@ public:
   
   class GenericView : public View {
   public:
-    GenericView(const std::string& file_path, const std::string& project_path);
+    GenericView(const std::string& file_path, const std::string& project_path, Glib::RefPtr<Gsv::Language> language);
   };
   
   class ClangViewParse : public View {
@@ -167,9 +164,5 @@ public:
     ClangView(const std::string& file_path, const std::string& project_path):
       ClangViewRefactor(file_path, project_path) {}
   };
-
-  Source(const std::string& file_path, std::string project_path);
-  
-  std::unique_ptr<Source::View> view;
 };  // class Source
 #endif  // JUCI_SOURCE_H_
diff --git a/src/sourcefile.cc b/src/sourcefile.cc
index 0374584..0583f06 100644
--- a/src/sourcefile.cc
+++ b/src/sourcefile.cc
@@ -1,92 +1,32 @@
 #include "sourcefile.h"
-#include <giomm.h>
-#include <string>
-#include <iostream>
-#include <vector>
+#include <fstream>
 
-using namespace std;
-
-sourcefile::sourcefile(const string &input_filename)
-  : lines(), filename(input_filename) {
-  open(input_filename);
-}
-
-/**
- * 
- */
-void sourcefile::open(const string &filename) {
-  Gio::init();
-
-  // Creates/Opens a file specified by the input string.
-  Glib::RefPtr<Gio::File> file = Gio::File::create_for_path(filename);
-
-  if (!file)  // Gio::File has overloaded operator
-    cerr << "Was not able to open file: " << filename << endl;
-
-  // Creates pointer for filestream
-
-  if (!file->query_exists()) {
-    file->create_file()->close();
-  }
-
-  Glib::RefPtr<Gio::FileInputStream> stream = file->read();
-
-  if (!stream)  // error message on stream failure
-    cerr << filename << " returned an empty stream" << endl;
-
-  Glib::RefPtr<Gio::DataInputStream>
-    datainput = Gio::DataInputStream::create(stream);
-
-  string line;
-  while (datainput->read_line(line)) {
-    lines.push_back(line);
+std::string juci::filesystem::open(std::string path) {
+  std::string res;
+  for (auto &line : lines(path)) {
+    res += line;
   }
-
-  datainput->close();
-  stream->close();
-}
-
-vector<string> sourcefile::get_lines() {
-  return lines;
-}
-
-string sourcefile::get_line(int line_number) {
-  return lines[line_number];
-}
-
-int sourcefile::save(const string &text) {
-  Gio::init();
-
-  // Creates/Opens a file specified by the input string.
-  Glib::RefPtr<Gio::File> file = Gio::File::create_for_path(filename);
-
-  if (!file)  // Gio::File has overloaded operator
-    cerr << "Was not able to open file: " << filename << endl;
-
-  // Creates
-  Glib::RefPtr<Gio::FileOutputStream> stream =
-    file->query_exists() ? file->replace() : file->create_file();
-
-  if (!stream)  // error message on stream failure
-    cerr << filename << " returned an empty stream" << endl;
-
-  Glib::RefPtr<Gio::DataOutputStream>
-    output = Gio::DataOutputStream::create(stream);
-
-  output->put_string(text);
-
-  output->close();
-  stream->close();
-
-
-  return 0;
+  return res;
 }
 
-string sourcefile::get_content() {
-  string res;
-  for (auto line : lines) {
-    res.append(line).append("\n");
+std::vector<std::string> juci::filesystem::lines(std::string path) {
+  std::vector<std::string> res;
+  std::ifstream input(path);
+  if (input.is_open()) {
+    do { res.emplace_back(); } while(getline(input, res.back()));
   }
+  input.close();
   return res;
 }
 
+int juci::filesystem::save(std::string path, std::string new_content) {
+  std::ofstream output(path);
+  if(output.is_open()) {
+    output << new_content;
+  } else {
+    output.close();
+    return 1;
+  }
+  output.close();
+  return 0;
+}
\ No newline at end of file
diff --git a/src/sourcefile.h b/src/sourcefile.h
index 2afc263..c86bc89 100644
--- a/src/sourcefile.h
+++ b/src/sourcefile.h
@@ -1,21 +1,20 @@
 #ifndef JUCI_SOURCEFILE_H_
 #define JUCI_SOURCEFILE_H_
-
-#include <string>
 #include <vector>
+#include <string>
+#include <boost/filesystem.hpp>
 
-class sourcefile {
-public:
-  explicit sourcefile(const std::string &filename);
-  std::vector<std::string> get_lines();
-  std::string get_content();
-  std::string get_line(int line_number);
-  int save(const std::string &text);
-
-private:
-  void open(const std::string &filename);
-  std::vector<std::string> lines;
-  std::string filename;
-};
-
+namespace juci {
+  class filesystem {
+  public:
+    static std::string open(std::string);
+    static std::string open(boost::filesystem::path path) { return open(path.string()); }
+    static std::vector<std::string> lines(std::string);
+    static std::vector<std::string> lines(boost::filesystem::path path) { return lines(path.string()); };
+    static int save(std::string, std::string);
+    static int save(boost::filesystem::path path, std::string new_content) { return save(path.string(), new_content); }
+    static int save(std::string path) { return save(path, ""); };
+    static int save(boost::filesystem::path path) { return save(path, ""); };
+  };
+} // namepace juci
 #endif  // JUCI_SOURCEFILE_H_
diff --git a/src/window.cc b/src/window.cc
index 3065fcb..b02a95d 100644
--- a/src/window.cc
+++ b/src/window.cc
@@ -1,203 +1,217 @@
 #include "window.h"
 #include "logging.h"
 #include "singletons.h"
+#include "sourcefile.h"
+#include "config.h"
+#include "api.h"
 
 namespace sigc {
   SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE
 }
 
-Window::Window() : notebook(), plugin_api(&notebook), box(Gtk::ORIENTATION_VERTICAL) {
+Window::Window() : box(Gtk::ORIENTATION_VERTICAL) {
   INFO("Create Window");
   set_title("juCi++");
   set_default_size(600, 400);
   set_events(Gdk::POINTER_MOTION_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::SCROLL_MASK);
   add(box);
-  //TODO: see TODO Window::on_directory_navigation
-  directories.m_TreeView.signal_row_activated().connect(sigc::mem_fun(*this, &Window::on_directory_navigation));
+
+  MainConfig(); //Read the configs here
+  PluginApi(&this->notebook); //Initialise plugins
+  add_menu();
+
+  box.pack_start(entry_box, Gtk::PACK_SHRINK);
+
+  directory_and_notebook_panes.pack1(directories, true, true); //TODO: should be pack1(directories, ...) Clean up directories.*
+  directory_and_notebook_panes.pack2(notebook);
+  directory_and_notebook_panes.set_position(120);
+
+  vpaned.set_position(300);
+  vpaned.pack1(directory_and_notebook_panes, true, false);
+  vpaned.pack2(Singleton::terminal()->view, true, true);
+  box.pack_end(vpaned);
+  show_all_children();
+
+  directories.on_row_activated=[this](const std::string &file) {
+    notebook.open(file);
+  };
+
+  entry_box.signal_show().connect([this](){
+      std::vector<Gtk::Widget*> focus_chain;
+      focus_chain.emplace_back(&entry_box);
+      box.set_focus_chain(focus_chain);
+    });
+  entry_box.signal_hide().connect([this](){
+      box.unset_focus_chain();
+    });
+  entry_box.signal_hide().connect([this]() {
+      if(notebook.get_current_page()!=-1) {
+        notebook.get_current_view()->grab_focus();
+      }
+    });
+
+  notebook.signal_switch_page().connect([this](Gtk::Widget* page, guint page_num) {
+      if(search_entry_shown && entry_box.labels.size()>0 && notebook.get_current_page()!=-1) {
+        notebook.get_current_view()->update_search_occurrences=[this](int number){
+          entry_box.labels.begin()->update(0, std::to_string(number));
+        };
+        notebook.get_current_view()->search_highlight(last_search, case_sensitive_search, regex_search);
+      }
+
+      if(notebook.get_current_page()!=-1) {
+        if(auto menu_item=dynamic_cast<Gtk::MenuItem*>(Singleton::menu()->ui_manager->get_widget("/MenuBar/SourceMenu/SourceGotoDeclaration")))
+          menu_item->set_sensitive((bool)notebook.get_current_view()->get_declaration_location);
+
+        if(auto menu_item=dynamic_cast<Gtk::MenuItem*>(Singleton::menu()->ui_manager->get_widget("/MenuBar/SourceMenu/SourceGotoMethod")))
+          menu_item->set_sensitive((bool)notebook.get_current_view()->goto_method);
+
+        if(auto menu_item=dynamic_cast<Gtk::MenuItem*>(Singleton::menu()->ui_manager->get_widget("/MenuBar/SourceMenu/SourceRename")))
+          menu_item->set_sensitive((bool)notebook.get_current_view()->rename_similar_tokens);
+      }
+    });
+  INFO("Window created");
+} // Window constructor
+
+void Window::add_menu() {
   auto menu=Singleton::menu();
   INFO("Adding actions to menu");
   menu->action_group->add(Gtk::Action::create("FileQuit", "Quit juCi++"), Gtk::AccelKey(menu->key_map["quit"]), [this]() {
-    hide();
-  });
+      hide();
+    });
   menu->action_group->add(Gtk::Action::create("FileNewFile", "New file"), Gtk::AccelKey(menu->key_map["new_file"]), [this]() {
-    new_file_entry();
-  });
+      new_file_entry();
+    });
   menu->action_group->add(Gtk::Action::create("FileOpenFile", "Open file"), Gtk::AccelKey(menu->key_map["open_file"]), [this]() {
-    open_file_dialog();
-  });
+      open_file_dialog();
+    });
   menu->action_group->add(Gtk::Action::create("FileOpenFolder", "Open folder"), Gtk::AccelKey(menu->key_map["open_folder"]), [this]() {
-    open_folder_dialog();
-  });
+      open_folder_dialog();
+    });
   menu->action_group->add(Gtk::Action::create("FileSaveAs", "Save as"), Gtk::AccelKey(menu->key_map["save_as"]), [this]() {
-    save_file_dialog();
-  });
+      save_file_dialog();
+    });
 
   menu->action_group->add(Gtk::Action::create("FileSave", "Save"), Gtk::AccelKey(menu->key_map["save"]), [this]() {
-    notebook.CurrentSourceView()->save();
-  });
-  
+      notebook.save_current();
+    });
+
   menu->action_group->add(Gtk::Action::create("EditCopy", "Copy"), Gtk::AccelKey(menu->key_map["edit_copy"]), [this]() {
-    auto widget=get_focus();
-    if(auto entry=dynamic_cast<Gtk::Entry*>(widget))
-      entry->copy_clipboard();
-    else if(auto text_view=dynamic_cast<Gtk::TextView*>(widget))
+      auto widget=get_focus();
+      if(auto entry=dynamic_cast<Gtk::Entry*>(widget))
+        entry->copy_clipboard();
+      else if(auto text_view=dynamic_cast<Gtk::TextView*>(widget))
         text_view->get_buffer()->copy_clipboard(Gtk::Clipboard::get());
-  });
+    });
   menu->action_group->add(Gtk::Action::create("EditCut", "Cut"), Gtk::AccelKey(menu->key_map["edit_cut"]), [this]() {
-    auto widget=get_focus();
-    if(auto entry=dynamic_cast<Gtk::Entry*>(widget))
-      entry->cut_clipboard();
-    else {
-      if (notebook.Pages() != 0)
-        notebook.CurrentSourceView()->get_buffer()->cut_clipboard(Gtk::Clipboard::get());
-    }
-  });
+      auto widget=get_focus();
+      if(auto entry=dynamic_cast<Gtk::Entry*>(widget))
+        entry->cut_clipboard();
+      else if(notebook.get_current_page()!=-1)
+        notebook.get_current_view()->get_buffer()->cut_clipboard(Gtk::Clipboard::get());
+    });
   menu->action_group->add(Gtk::Action::create("EditPaste", "Paste"), Gtk::AccelKey(menu->key_map["edit_paste"]), [this]() {
-    auto widget=get_focus();
-    if(auto entry=dynamic_cast<Gtk::Entry*>(widget))
-      entry->paste_clipboard();
-    else {
-      if (notebook.Pages() != 0)
-        notebook.CurrentSourceView()->get_buffer()->paste_clipboard(Gtk::Clipboard::get());
-    }
-  });
+      auto widget=get_focus();
+      if(auto entry=dynamic_cast<Gtk::Entry*>(widget))
+        entry->paste_clipboard();
+      else if(notebook.get_current_page()!=-1)
+        notebook.get_current_view()->get_buffer()->paste_clipboard(Gtk::Clipboard::get());
+    });
   menu->action_group->add(Gtk::Action::create("EditFind", "Find"), Gtk::AccelKey(menu->key_map["edit_find"]), [this]() {
-    search_and_replace_entry();
-  });
-  
-  menu->action_group->add(Gtk::Action::create("SourceRename", "Rename function/variable"), Gtk::AccelKey(menu->key_map["source_rename"]), [this]() {
-    entry_box.clear();
-    if(notebook.CurrentPage()!=-1) {
-      if(notebook.CurrentSourceView()->get_token && notebook.CurrentSourceView()->get_token_name) {
-        auto token=std::make_shared<std::string>(notebook.CurrentSourceView()->get_token());
-        if(token->size()>0 && notebook.CurrentSourceView()->get_token_name) {
-          auto token_name=std::make_shared<std::string>(notebook.CurrentSourceView()->get_token_name());
-          for(int c=0;c<notebook.Pages();c++) {
-            if(notebook.source_views.at(c)->view->tag_similar_tokens) {
-              notebook.source_views.at(c)->view->tag_similar_tokens(*token);
-            }
+      search_and_replace_entry();
+    });
+  menu->action_group->add(Gtk::Action::create("EditUndo", "Undo"), Gtk::AccelKey(menu->key_map["edit_undo"]), [this]() {
+      INFO("On undo");
+      if(notebook.get_current_page()!=-1) {
+        auto undo_manager = notebook.get_current_view()->get_source_buffer()->get_undo_manager();
+        if (undo_manager->can_undo()) {
+          undo_manager->undo();
+        }
+      }
+      INFO("Done undo");
+    });
+  menu->action_group->add(Gtk::Action::create("EditRedo", "Redo"), Gtk::AccelKey(menu->key_map["edit_redo"]), [this]() {
+      INFO("On Redo");
+      if(notebook.get_current_page()!=-1) {
+        auto undo_manager = notebook.get_current_view()->get_source_buffer()->get_undo_manager();
+        if(undo_manager->can_redo()) {
+          undo_manager->redo();
+        }
+      }
+      INFO("Done Redo");
+    });
+
+  menu->action_group->add(Gtk::Action::create("SourceGotoDeclaration", "Go to declaration"), Gtk::AccelKey(menu->key_map["source_goto_declaration"]), [this]() {
+      if(notebook.get_current_page()!=-1) {
+        if(notebook.get_current_view()->get_declaration_location) {
+          auto location=notebook.get_current_view()->get_declaration_location();
+          if(location.first.size()>0) {
+            notebook.open(location.first);
+            notebook.get_current_view()->get_buffer()->place_cursor(notebook.get_current_view()->get_buffer()->get_iter_at_offset(location.second));
+            while(gtk_events_pending())
+              gtk_main_iteration();
+            notebook.get_current_view()->scroll_to(notebook.get_current_view()->get_buffer()->get_insert(), 0.0, 1.0, 0.5);
           }
-          entry_box.labels.emplace_back();
-          auto label_it=entry_box.labels.begin();
-          label_it->update=[label_it](int state, const std::string& message){
-            label_it->set_text("Warning: only opened and parsed tabs will have its content renamed, and modified files will be saved.");
-          };
-          label_it->update(0, "");
-          entry_box.entries.emplace_back(*token_name, [this, token_name, token](const std::string& content){
-            if(notebook.CurrentPage()!=-1 && content!=*token_name) {
-              for(int c=0;c<notebook.Pages();c++) {
-                if(notebook.source_views.at(c)->view->rename_similar_tokens) {
-                  auto number=notebook.source_views.at(c)->view->rename_similar_tokens(*token, content);
-                  if(number>0) {
-                    Singleton::terminal()->print("Replaced "+std::to_string(number)+" occurrences in file "+notebook.source_views.at(c)->view->file_path+"\n");
-                    notebook.source_views.at(c)->view->save();
-                  }
-                }
-              }
-              entry_box.hide();
-            }
-          });
-          auto entry_it=entry_box.entries.begin();
-          entry_box.buttons.emplace_back("Rename", [this, entry_it](){
-            entry_it->activate();
-          });
-          entry_box.show();
         }
       }
-    }
-  });
-  
+    });
+  menu->action_group->add(Gtk::Action::create("SourceGotoMethod", "Go to method"), Gtk::AccelKey(menu->key_map["source_goto_method"]), [this]() {
+      if(notebook.get_current_page()!=-1) {
+        if(notebook.get_current_view()->goto_method) {
+          notebook.get_current_view()->goto_method();
+        }
+      }
+    });
+  menu->action_group->add(Gtk::Action::create("SourceRename", "Rename"), Gtk::AccelKey(menu->key_map["source_rename"]), [this]() {
+      rename_token_entry();
+    });
+
   menu->action_group->add(Gtk::Action::create("ProjectCompileAndRun", "Compile And Run"), Gtk::AccelKey(menu->key_map["compile_and_run"]), [this]() {
-    if(notebook.CurrentPage()==-1)
-      return;
-    notebook.CurrentSourceView()->save();
-    if (running.try_lock()) {
-      std::thread execute([this]() {
-      	std::string path = notebook.CurrentSourceView()->file_path;
-      	size_t pos = path.find_last_of("/\\");
-      	if(pos != std::string::npos) {
-      	  path.erase(path.begin()+pos,path.end());
-      	  Singleton::terminal()->SetFolderCommand(path);
-      	}
-      	Singleton::terminal()->Compile();
-      	std::string executable = directories.GetCmakeVarValue(path,"add_executable");
-      	Singleton::terminal()->Run(executable);
-        running.unlock();
-      });
-      execute.detach();
-    }
-  });
-   
+      if(notebook.get_current_page()==-1)
+        return;
+      notebook.save_current();
+      if (running.try_lock()) {
+        std::thread execute([this]() {
+            std::string path = notebook.get_current_view()->file_path;
+            size_t pos = path.find_last_of("/\\");
+            if(pos != std::string::npos) {
+              path.erase(path.begin()+pos,path.end());
+              Singleton::terminal()->SetFolderCommand(path);
+            }
+            Singleton::terminal()->Compile();
+            std::string executable = directories.get_cmakelists_variable(path,"add_executable");
+            Singleton::terminal()->Run(executable);
+            running.unlock();
+          });
+        execute.detach();
+      }
+    });
   menu->action_group->add(Gtk::Action::create("ProjectCompile", "Compile"), Gtk::AccelKey(menu->key_map["compile"]), [this]() {
-    if(notebook.CurrentPage()==-1)
-      return;
-    notebook.CurrentSourceView()->save();
-    if (running.try_lock()) {
-      std::thread execute([this]() {		  
-        std::string path = notebook.CurrentSourceView()->file_path;
-        size_t pos = path.find_last_of("/\\");
-        if(pos != std::string::npos){
-          path.erase(path.begin()+pos,path.end());
-          Singleton::terminal()->SetFolderCommand(path);
-        }
-        Singleton::terminal()->Compile();
-        running.unlock();
-      });
-      execute.detach();
-    }
-  });
-  INFO("Done adding actions to menu, building menu:")
+      if(notebook.get_current_page()==-1)
+        return;
+      notebook.save_current();
+      if (running.try_lock()) {
+        std::thread execute([this]() {
+            std::string path = notebook.get_current_view()->file_path;
+            size_t pos = path.find_last_of("/\\");
+            if(pos != std::string::npos){
+              path.erase(path.begin()+pos,path.end());
+              Singleton::terminal()->SetFolderCommand(path);
+            }
+            Singleton::terminal()->Compile();
+            running.unlock();
+          });
+        execute.detach();
+      }
+    });
+
+  menu->action_group->add(Gtk::Action::create("WindowCloseTab", "Close tab"), Gtk::AccelKey(menu->key_map["close_tab"]), [this]() {
+      notebook.close_current_page();
+    });
   add_accel_group(menu->ui_manager->get_accel_group());
   menu->build();
   INFO("Menu build")
-  box.pack_start(menu->get_widget(), Gtk::PACK_SHRINK);
-  box.pack_start(entry_box, Gtk::PACK_SHRINK);
-  
-  directory_and_notebook_panes.pack1(directories.widget(), true, true); //TODO: should be pack1(directories, ...) Clean up directories.*
-  directory_and_notebook_panes.pack2(notebook);
-  directory_and_notebook_panes.set_position(120);
-  
-  vpaned.set_position(300);
-  vpaned.pack1(directory_and_notebook_panes, true, false);
-  vpaned.pack2(Singleton::terminal()->view, true, true);
-  box.pack_end(vpaned);
-  show_all_children();
-  
-  entry_box.signal_show().connect([this](){
-    std::vector<Gtk::Widget*> focus_chain;
-    focus_chain.emplace_back(&entry_box);
-    box.set_focus_chain(focus_chain);
-  });
-  entry_box.signal_hide().connect([this](){
-    box.unset_focus_chain();
-  });
-  entry_box.signal_hide().connect([this]() {
-    if(notebook.CurrentPage()!=-1) {
-      notebook.CurrentSourceView()->grab_focus();
-    }
-  });
-  notebook.signal_switch_page().connect([this](Gtk::Widget* page, guint page_num) {
-    if(search_entry_shown && entry_box.labels.size()>0 && notebook.CurrentPage()!=-1) {
-      notebook.CurrentSourceView()->update_search_occurrences=[this](int number){
-        entry_box.labels.begin()->update(0, std::to_string(number));
-      };
-      notebook.CurrentSourceView()->search_highlight(last_search, case_sensitive_search, regex_search);
-    }
-    
-    if(notebook.CurrentPage()!=-1) {
-      if(auto menu_item=dynamic_cast<Gtk::MenuItem*>(Singleton::menu()->ui_manager->get_widget("/MenuBar/SourceMenu/SourceGotoDeclaration")))
-        menu_item->set_sensitive((bool)notebook.CurrentSourceView()->get_declaration_location);
-      
-      if(auto menu_item=dynamic_cast<Gtk::MenuItem*>(Singleton::menu()->ui_manager->get_widget("/MenuBar/SourceMenu/SourceGotoMethod")))
-        menu_item->set_sensitive((bool)notebook.CurrentSourceView()->goto_method);
-      
-      if(auto menu_item=dynamic_cast<Gtk::MenuItem*>(Singleton::menu()->ui_manager->get_widget("/MenuBar/SourceMenu/SourceRename")))
-        menu_item->set_sensitive((bool)notebook.CurrentSourceView()->rename_similar_tokens);
-    }
-  });
-  
-  INFO("Window created");
-} // Window constructor
+    box.pack_start(menu->get_widget(), Gtk::PACK_SHRINK);
+}
 
 bool Window::on_key_press_event(GdkEventKey *event) {
   if(event->keyval==GDK_KEY_Escape)
@@ -236,7 +250,7 @@ bool Window::on_key_press_event(GdkEventKey *event) {
     }
   }
 #endif
-  
+
   return Gtk::Window::on_key_press_event(event);
 }
 
@@ -246,8 +260,8 @@ bool Window::on_delete_event (GdkEventAny *event) {
 }
 
 void Window::hide() {
-  auto size=notebook.source_views.size();
-  for(size_t c=0;c<size;c++) {
+  auto size=notebook.size();
+  for(int c=0;c<size;c++) {
     if(!notebook.close_current_page())
       return;
   }
@@ -266,17 +280,11 @@ void Window::new_file_entry() {
         Singleton::terminal()->print("Error: "+p.string()+" already exists.\n");
       }
       else {
-        std::ofstream f(p.string().c_str());
-        if(f) {
-          notebook.open_file(boost::filesystem::canonical(p).string());
-          Singleton::terminal()->print("New file "+p.string()+" created.\n");
-          if(notebook.project_path!="")
-            directories.open_folder(notebook.project_path); //TODO: Do refresh instead
-        }
-        else {
-          Singleton::terminal()->print("Error: could not create new file "+p.string()+".\n");
-        }
-        f.close();
+        juci::filesystem::save(p);
+        notebook.open(boost::filesystem::canonical(p).string());
+        Singleton::terminal()->print("New file "+p.string()+" created.\n");
+        if(notebook.project_path!="")
+           directories.open_folder(notebook.project_path); //TODO: Do refresh instead
       }
     }
     entry_box.hide();
@@ -310,7 +318,6 @@ void Window::open_file_dialog() {
   Gtk::FileChooserDialog dialog("Please choose a file", Gtk::FILE_CHOOSER_ACTION_OPEN);
   if(notebook.project_path.size()>0)
     gtk_file_chooser_set_current_folder((GtkFileChooser*)dialog.gobj(), notebook.project_path.c_str());
-  std::cout << notebook.project_path << std::endl;
   dialog.set_transient_for(*this);
   dialog.set_position(Gtk::WindowPosition::WIN_POS_CENTER_ALWAYS);
 
@@ -340,14 +347,16 @@ void Window::open_file_dialog() {
 
   if(result==Gtk::RESPONSE_OK) {
     std::string path = dialog.get_filename();
-    notebook.open_file(path);
+    notebook.open(path);
   }
 }
 
 void Window::save_file_dialog() {
+  if(notebook.get_current_page()==-1)
+    return;
   INFO("Save file dialog");
   Gtk::FileChooserDialog dialog(*this, "Please choose a file", Gtk::FILE_CHOOSER_ACTION_SAVE);
-  gtk_file_chooser_set_filename((GtkFileChooser*)dialog.gobj(), notebook.CurrentSourceView()->file_path.c_str());
+  gtk_file_chooser_set_filename((GtkFileChooser*)dialog.gobj(), notebook.get_current_view()->file_path.c_str());
   dialog.set_position(Gtk::WindowPosition::WIN_POS_CENTER_ALWAYS);
   dialog.add_button("_Cancel", Gtk::RESPONSE_CANCEL);
   dialog.add_button("_Save", Gtk::RESPONSE_OK);
@@ -358,10 +367,10 @@ void Window::save_file_dialog() {
     if(path.size()>0) {
       std::ofstream file(path);
       if(file) {
-        file << notebook.CurrentSourceView()->get_buffer()->get_text();
+        file << notebook.get_current_view()->get_buffer()->get_text();
         file.close();
-        notebook.open_file(path);
-        Singleton::terminal()->print("File saved to: " + notebook.CurrentSourceView()->file_path+"\n");
+        notebook.open(path);
+        Singleton::terminal()->print("File saved to: " + notebook.get_current_view()->file_path+"\n");
         if(notebook.project_path!="")
           directories.open_folder(notebook.project_path); //TODO: Do refresh instead
       }
@@ -371,27 +380,6 @@ void Window::save_file_dialog() {
   }
 }
 
-//TODO: move most of it to Directories
-void Window::on_directory_navigation(const Gtk::TreeModel::Path& path, Gtk::TreeViewColumn* column) {
-  INFO("Directory navigation");
-  Gtk::TreeModel::iterator iter = directories.m_refTreeModel->get_iter(path);
-  if (iter) {
-    Gtk::TreeModel::Row row = *iter;
-    std::string upath = Glib::ustring(row[directories.view().m_col_path]);
-    boost::filesystem::path fs_path(upath);
-    if (boost::filesystem::is_directory(fs_path)) {
-      directories.m_TreeView.row_expanded(path) ?
-        directories.m_TreeView.collapse_row(path) :
-        directories.m_TreeView.expand_row(path, false);
-    } else {
-      std::stringstream sstm;
-      sstm << row[directories.view().m_col_path];
-      std::string file = sstm.str();
-      notebook.open_file(file);
-    }
-  }
-}
-
 void Window::search_and_replace_entry() {
   entry_box.clear();
   entry_box.labels.emplace_back();
@@ -408,81 +396,123 @@ void Window::search_and_replace_entry() {
     }
   };
   entry_box.entries.emplace_back(last_search, [this](const std::string& content){
-    if(notebook.CurrentPage()!=-1)
-      notebook.CurrentSourceView()->search_forward();
-  });
+      if(notebook.get_current_page()!=-1)
+        notebook.get_current_view()->search_forward();
+    });
   auto search_entry_it=entry_box.entries.begin();
   search_entry_it->set_placeholder_text("Find");
-  if(notebook.CurrentPage()!=-1) {
-    notebook.CurrentSourceView()->update_search_occurrences=[label_it](int number){
+  if(notebook.get_current_page()!=-1) {
+    notebook.get_current_view()->update_search_occurrences=[label_it](int number){
       label_it->update(0, std::to_string(number));
     };
-    notebook.CurrentSourceView()->search_highlight(search_entry_it->get_text(), case_sensitive_search, regex_search);
+    notebook.get_current_view()->search_highlight(search_entry_it->get_text(), case_sensitive_search, regex_search);
   }
   search_entry_it->signal_key_press_event().connect([this](GdkEventKey* event){
-    if(event->keyval==GDK_KEY_Return && event->state==GDK_SHIFT_MASK) {
-      if(notebook.CurrentPage()!=-1)
-        notebook.CurrentSourceView()->search_backward();
-    }
-    return false;
-  });
+      if(event->keyval==GDK_KEY_Return && event->state==GDK_SHIFT_MASK) {
+        if(notebook.get_current_page()!=-1)
+          notebook.get_current_view()->search_backward();
+      }
+      return false;
+    });
   search_entry_it->signal_changed().connect([this, search_entry_it](){
-    last_search=search_entry_it->get_text();
-    if(notebook.CurrentPage()!=-1)
-      notebook.CurrentSourceView()->search_highlight(search_entry_it->get_text(), case_sensitive_search, regex_search);
-  });
-  
+      last_search=search_entry_it->get_text();
+      if(notebook.get_current_page()!=-1)
+        notebook.get_current_view()->search_highlight(search_entry_it->get_text(), case_sensitive_search, regex_search);
+    });
+
   entry_box.entries.emplace_back(last_replace, [this](const std::string &content){
-    if(notebook.CurrentPage()!=-1)
-      notebook.CurrentSourceView()->replace_forward(content);
-  });
+      if(notebook.get_current_page()!=-1)
+        notebook.get_current_view()->replace_forward(content);
+    });
   auto replace_entry_it=entry_box.entries.begin();
   replace_entry_it++;
   replace_entry_it->set_placeholder_text("Replace");
   replace_entry_it->signal_key_press_event().connect([this, replace_entry_it](GdkEventKey* event){
-    if(event->keyval==GDK_KEY_Return && event->state==GDK_SHIFT_MASK) {
-      if(notebook.CurrentPage()!=-1)
-        notebook.CurrentSourceView()->replace_backward(replace_entry_it->get_text());
-    }
-    return false;
-  });
+      if(event->keyval==GDK_KEY_Return && event->state==GDK_SHIFT_MASK) {
+        if(notebook.get_current_page()!=-1)
+          notebook.get_current_view()->replace_backward(replace_entry_it->get_text());
+      }
+      return false;
+    });
   replace_entry_it->signal_changed().connect([this, replace_entry_it](){
-    last_replace=replace_entry_it->get_text();
-  });
-  
+      last_replace=replace_entry_it->get_text();
+    });
+
   entry_box.buttons.emplace_back("Find", [this](){
-    if(notebook.CurrentPage()!=-1)
-      notebook.CurrentSourceView()->search_forward();
-  });
+      if(notebook.get_current_page()!=-1)
+        notebook.get_current_view()->search_forward();
+    });
   entry_box.buttons.emplace_back("Replace", [this, replace_entry_it](){
-    if(notebook.CurrentPage()!=-1)
-      notebook.CurrentSourceView()->replace_forward(replace_entry_it->get_text());
-  });
+      if(notebook.get_current_page()!=-1)
+        notebook.get_current_view()->replace_forward(replace_entry_it->get_text());
+    });
   entry_box.buttons.emplace_back("Replace all", [this, replace_entry_it](){
-    if(notebook.CurrentPage()!=-1)
-      notebook.CurrentSourceView()->replace_all(replace_entry_it->get_text());
-  });
+      if(notebook.get_current_page()!=-1)
+        notebook.get_current_view()->replace_all(replace_entry_it->get_text());
+    });
   entry_box.toggle_buttons.emplace_back("Match case");
   entry_box.toggle_buttons.back().set_active(case_sensitive_search);
   entry_box.toggle_buttons.back().on_activate=[this, search_entry_it](){
     case_sensitive_search=!case_sensitive_search;
-    if(notebook.CurrentPage()!=-1)
-      notebook.CurrentSourceView()->search_highlight(search_entry_it->get_text(), case_sensitive_search, regex_search);
+    if(notebook.get_current_page()!=-1)
+      notebook.get_current_view()->search_highlight(search_entry_it->get_text(), case_sensitive_search, regex_search);
   };
   entry_box.toggle_buttons.emplace_back("Use regex");
   entry_box.toggle_buttons.back().set_active(regex_search);
   entry_box.toggle_buttons.back().on_activate=[this, search_entry_it](){
     regex_search=!regex_search;
-    if(notebook.CurrentPage()!=-1)
-      notebook.CurrentSourceView()->search_highlight(search_entry_it->get_text(), case_sensitive_search, regex_search);
+    if(notebook.get_current_page()!=-1)
+      notebook.get_current_view()->search_highlight(search_entry_it->get_text(), case_sensitive_search, regex_search);
   };
   entry_box.signal_hide().connect([this]() {
-    for(int c=0;c<notebook.Pages();c++) {
-      notebook.source_views.at(c)->view->update_search_occurrences=nullptr;
-      notebook.source_views.at(c)->view->search_highlight("", case_sensitive_search, regex_search);
-    }
-    search_entry_shown=false;
-  });
+      for(int c=0;c<notebook.size();c++) {
+        notebook.get_view(c)->update_search_occurrences=nullptr;
+        notebook.get_view(c)->search_highlight("", case_sensitive_search, regex_search);
+      }
+      search_entry_shown=false;
+    });
   search_entry_shown=true;
   entry_box.show();
 }
+
+void Window::rename_token_entry() {
+  entry_box.clear();
+  if(notebook.get_current_page()!=-1) {
+    if(notebook.get_current_view()->get_token && notebook.get_current_view()->get_token_name) {
+      auto token=std::make_shared<std::string>(notebook.get_current_view()->get_token());
+      if(token->size()>0 && notebook.get_current_view()->get_token_name) {
+        auto token_name=std::make_shared<std::string>(notebook.get_current_view()->get_token_name());
+        for(int c=0;c<notebook.size();c++) {
+          if(notebook.get_view(c)->tag_similar_tokens) {
+            notebook.get_view(c)->tag_similar_tokens(*token);
+          }
+        }
+        entry_box.labels.emplace_back();
+        auto label_it=entry_box.labels.begin();
+        label_it->update=[label_it](int state, const std::string& message){
+          label_it->set_text("Warning: only opened and parsed tabs will have its content renamed, and modified files will be saved.");
+        };
+        label_it->update(0, "");
+        entry_box.entries.emplace_back(*token_name, [this, token_name, token](const std::string& content){
+            if(notebook.get_current_page()!=-1 && content!=*token_name) {
+              for(int c=0;c<notebook.size();c++) {
+                if(notebook.get_view(c)->rename_similar_tokens) {
+                  auto number=notebook.get_view(c)->rename_similar_tokens(*token, content);
+                  if(number>0) {
+                    Singleton::terminal()->print("Replaced "+std::to_string(number)+" occurrences in file "+notebook.get_view(c)->file_path+"\n");
+                    notebook.save(c);
+                  }
+                }
+              }
+              entry_box.hide();
+            }
+          });
+        auto entry_it=entry_box.entries.begin();
+        entry_box.buttons.emplace_back("Rename", [this, entry_it](){
+            entry_it->activate();
+          });
+        entry_box.show();
+      }
+    }
+  }
+}
diff --git a/src/window.h b/src/window.h
index 21dc235..8c505f9 100644
--- a/src/window.h
+++ b/src/window.h
@@ -1,15 +1,16 @@
 #ifndef JUCI_WINDOW_H_
 #define JUCI_WINDOW_H_
 
-#include "api.h"
 #include <cstddef>
-
+#include "directories.h"
+#include "entrybox.h"
+#include "notebook.h"
 
 class Window : public Gtk::Window {
 public:
   Window();
   Notebook notebook;
-  Directories::Controller directories;
+  Directories directories;
 protected:
   bool on_key_press_event(GdkEventKey *event);
   bool on_delete_event (GdkEventAny *event);
@@ -18,17 +19,17 @@ private:
   Gtk::VPaned vpaned;
   Gtk::Paned directory_and_notebook_panes;
   EntryBox entry_box;
-  PluginApi plugin_api;
   std::mutex running;
 
+  void add_menu();
   void hide();
   void new_file_entry();
   void open_folder_dialog();
   void open_file_dialog();
   void save_file_dialog();
-  void on_directory_navigation(const Gtk::TreeModel::Path& path, Gtk::TreeViewColumn* column);
   
   void search_and_replace_entry();
+  void rename_token_entry();
   std::string last_search;
   std::string last_replace;
   bool case_sensitive_search=true;