Add scope class and encapsulate Options, Keymaps, Aliases and Hooks in it

15 files changed, 201 insertions, 241 deletions

diff --git a/src/alias_registry.hh b/src/alias_registry.hh
index 97f52ee3..ae879eef 100644
--- a/src/alias_registry.hh
+++ b/src/alias_registry.hh
@@ -21,16 +21,13 @@ public:
     std::vector<StringView> aliases_for(StringView command) const;
 
 private:
-    friend class GlobalAliases;
+    friend class Scope;
     AliasRegistry() {}
 
     safe_ptr<AliasRegistry> m_parent;
     std::unordered_map<String, String> m_aliases;
 };
 
-class GlobalAliases : public AliasRegistry, public Singleton<GlobalAliases>
-{};
-
 }
 
 #endif // alias_registry_hh_INCLUDED
diff --git a/src/buffer.cc b/src/buffer.cc
index 9bdc76df..6956c121 100644
--- a/src/buffer.cc
+++ b/src/buffer.cc
@@ -16,18 +16,15 @@ namespace Kakoune
 
 Buffer::Buffer(String name, Flags flags, std::vector<String> lines,
                time_t fs_timestamp)
-    : m_name(flags & Flags::File ? real_path(parse_filename(name)) : std::move(name)),
+    : Scope(GlobalScope::instance()),
+      m_name(flags & Flags::File ? real_path(parse_filename(name)) : std::move(name)),
       m_flags(flags | Flags::NoUndo),
       m_history(), m_history_cursor(m_history.begin()),
       m_last_save_undo_index(0),
-      m_fs_timestamp(fs_timestamp),
-      m_hooks(GlobalHooks::instance()),
-      m_options(GlobalOptions::instance()),
-      m_keymaps(GlobalKeymaps::instance()),
-      m_aliases(GlobalAliases::instance())
+      m_fs_timestamp(fs_timestamp)
 {
     BufferManager::instance().register_buffer(*this);
-    m_options.register_watcher(*this);
+    options().register_watcher(*this);
 
     if (lines.empty())
         lines.emplace_back("\n");
@@ -57,7 +54,7 @@ Buffer::Buffer(String name, Flags flags, std::vector<String> lines,
     // now we may begin to record undo data
     m_flags = flags;
 
-    for (auto& option : m_options.flatten_options())
+    for (auto& option : options().flatten_options())
         on_option_changed(*option);
 }
 
@@ -65,7 +62,7 @@ Buffer::~Buffer()
 {
     run_hook_in_own_context("BufClose", m_name);
 
-    m_options.unregister_watcher(*this);
+    options().unregister_watcher(*this);
     BufferManager::instance().unregister_buffer(*this);
     m_values.clear();
 }
@@ -520,7 +517,7 @@ void Buffer::on_option_changed(const Option& option)
 void Buffer::run_hook_in_own_context(const String& hook_name, StringView param)
 {
     InputHandler hook_handler({ *this, Selection{} });
-    m_hooks.run_hook(hook_name, param, hook_handler.context());
+    hooks().run_hook(hook_name, param, hook_handler.context());
 }
 
 ByteCoord Buffer::last_modification_coord() const
diff --git a/src/buffer.hh b/src/buffer.hh
index 63b2e7cd..4715ddc1 100644
--- a/src/buffer.hh
+++ b/src/buffer.hh
@@ -1,13 +1,10 @@
 #ifndef buffer_hh_INCLUDED
 #define buffer_hh_INCLUDED
 
-#include "alias_registry.hh"
 #include "coord.hh"
 #include "flags.hh"
-#include "hook_manager.hh"
-#include "option_manager.hh"
-#include "keymap_manager.hh"
 #include "safe_ptr.hh"
+#include "scope.hh"
 #include "interned_string.hh"
 #include "value.hh"
 
@@ -71,7 +68,7 @@ private:
 // The Buffer class permits to read and mutate this file
 // representation. It also manage modifications undo/redo and
 // provides tools to deal with the line/column nature of text.
-class Buffer : public SafeCountable, public OptionManagerWatcher
+class Buffer : public SafeCountable, public OptionManagerWatcher, public Scope
 {
 public:
     enum class Flags
@@ -150,15 +147,6 @@ public:
     // notify the buffer that it was saved in the current state
     void notify_saved();
 
-    OptionManager&       options()       { return m_options; }
-    const OptionManager& options() const { return m_options; }
-    HookManager&         hooks()         { return m_hooks; }
-    const HookManager&   hooks()   const { return m_hooks; }
-    KeymapManager&       keymaps()       { return m_keymaps; }
-    const KeymapManager& keymaps() const { return m_keymaps; }
-    AliasRegistry&       aliases()       { return m_aliases; }
-    const AliasRegistry& aliases() const { return m_aliases; }
-
     ValueMap& values() const { return m_values; }
 
     void run_hook_in_own_context(const String& hook_name, StringView param);
@@ -217,11 +205,6 @@ private:
 
     time_t m_fs_timestamp;
 
-    OptionManager m_options;
-    HookManager   m_hooks;
-    KeymapManager m_keymaps;
-    AliasRegistry m_aliases;
-
     // Values are just data holding by the buffer, so it is part of its
     // observable state
     mutable ValueMap m_values;
diff --git a/src/commands.cc b/src/commands.cc
index 9bb6d8e1..240daea1 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -84,6 +84,26 @@ const ParameterDesc single_optional_name_param{
 
 static constexpr auto scopes = { "global", "buffer", "window" };
 
+Scope* get_scope_ifp(const String& scope, const Context& context)
+{
+    if (prefix_match("global", scope))
+        return &GlobalScope::instance();
+    else if (prefix_match("buffer", scope))
+        return &context.buffer();
+    else if (prefix_match("window", scope))
+        return &context.window();
+    else if (prefix_match(scope, "buffer="))
+        return &BufferManager::instance().get_buffer(scope.substr(7_byte));
+    return nullptr;
+}
+
+Scope& get_scope(const String& scope, const Context& context)
+{
+    if (auto s = get_scope_ifp(scope, context))
+        return *s;
+    throw runtime_error("error: no such scope " + scope);
+}
+
 struct CommandDesc
 {
     const char* name;
@@ -495,24 +515,6 @@ const CommandDesc rm_highlighter_cmd = {
     }
 };
 
-HookManager* get_hook_manager_ifp(const String& scope, const Context& context)
-{
-    if (prefix_match("global", scope))
-        return &GlobalHooks::instance();
-    else if (prefix_match("buffer", scope))
-        return &context.buffer().hooks();
-    else if (prefix_match("window", scope))
-        return &context.window().hooks();
-    return nullptr;
-}
-
-HookManager& get_hook_manager(const String& scope, const Context& context)
-{
-    if (auto manager = get_hook_manager_ifp(scope, context))
-        return *manager;
-    throw runtime_error("error: no such hook container " + scope);
-}
-
 const CommandDesc add_hook_cmd = {
     "hook",
     nullptr,
@@ -557,14 +559,14 @@ const CommandDesc add_hook_cmd = {
         StringView group;
         if (parser.has_option("group"))
             group = parser.option_value("group");
-        get_hook_manager(parser[0], context).add_hook(parser[1], group, hook_func);
+        get_scope(parser[0], context).hooks().add_hook(parser[1], group, hook_func);
     }
 };
 
 const CommandDesc rm_hook_cmd = {
     "rmhooks",
     nullptr,
-    "rmhooks <group>: remove all hooks whose group is <group>",
+    "rmhooks <scope> <group>: remove all hooks whose group is <group>",
     ParameterDesc{ SwitchMap{}, ParameterDesc::Flags::None, 2, 2 },
     CommandFlags::None,
     [](const Context& context, CompletionFlags flags,
@@ -576,15 +578,15 @@ const CommandDesc rm_hook_cmd = {
                      prefix_complete(params[0].substr(0_byte, pos_in_token), scopes) };
         else if (token_to_complete == 1)
         {
-            if (auto manager = get_hook_manager_ifp(params[0], context))
+            if (auto scope = get_scope_ifp(params[0], context))
                 return { 0_byte, params[0].length(),
-                         manager->complete_hook_group(params[1], pos_in_token) };
+                         scope->hooks().complete_hook_group(params[1], pos_in_token) };
         }
         return {};
     },
     [](const ParametersParser& parser, Context& context)
     {
-        get_hook_manager(parser[0], context).remove_hooks(parser[1]);
+        get_scope(parser[0], context).hooks().remove_hooks(parser[1]);
     }
 };
 
@@ -712,17 +714,6 @@ const CommandDesc define_command_cmd = {
     define_command
 };
 
-AliasRegistry& get_aliases(const String& scope, const Context& context)
-{
-    if (prefix_match("global", scope))
-        return GlobalAliases::instance();
-    else if (prefix_match("buffer", scope))
-        return context.buffer().aliases();
-    else if (prefix_match("window", scope))
-        return context.window().aliases();
-    throw runtime_error("error: no such scope " + scope);
-}
-
 const CommandDesc alias_cmd = {
     "alias",
     nullptr,
@@ -732,7 +723,7 @@ const CommandDesc alias_cmd = {
     CommandCompleter{},
     [](const ParametersParser& parser, Context& context)
     {
-        AliasRegistry& aliases = get_aliases(parser[0], context);
+        AliasRegistry& aliases = get_scope(parser[0], context).aliases();
         aliases.add_alias(parser[1], parser[2]);
     }
 };
@@ -747,7 +738,7 @@ const CommandDesc unalias_cmd = {
     CommandCompleter{},
     [](const ParametersParser& parser, Context& context)
     {
-        AliasRegistry& aliases = get_aliases(parser[0], context);
+        AliasRegistry& aliases = get_scope(parser[0], context).aliases();
         if (parser.positional_count() == 3 and
             aliases[parser[1]] != parser[2])
             return;
@@ -831,19 +822,6 @@ const CommandDesc source_cmd = {
     }
 };
 
-OptionManager& get_options(const String& scope, const Context& context)
-{
-    if (prefix_match("global", scope))
-        return GlobalOptions::instance();
-    else if (prefix_match("buffer", scope))
-        return context.buffer().options();
-    else if (prefix_match("window", scope))
-        return context.window().options();
-    else if (prefix_match(scope, "buffer="))
-        return BufferManager::instance().get_buffer(scope.substr(7_byte)).options();
-    throw runtime_error("error: no such option container " + scope);
-}
-
 const CommandDesc set_option_cmd = {
     "set",
     nullptr,
@@ -863,14 +841,14 @@ const CommandDesc set_option_cmd = {
                      prefix_complete(params[0].substr(0_byte, pos_in_token), scopes) };
         else if (token_to_complete == 1)
         {
-            OptionManager& options = get_options(params[0], context);
+            OptionManager& options = get_scope(params[0], context).options();
             return { 0_byte, params[1].length(),
                      options.complete_option_name(params[1], pos_in_token) };
         }
         else if (token_to_complete == 2 and
-                 GlobalOptions::instance().option_exists(params[1]))
+                 GlobalScope::instance().option_registry().option_exists(params[1]))
         {
-            OptionManager& options = get_options(params[0], context);
+            OptionManager& options = get_scope(params[0], context).options();
             String val = options[params[1]].get_as_string();
             if (prefix_match(val, params[2]))
                 return { 0_byte, params[2].length(), { std::move(val) } };
@@ -879,7 +857,7 @@ const CommandDesc set_option_cmd = {
     },
     [](const ParametersParser& parser, Context& context)
     {
-        Option& opt = get_options(parser[0], context).get_local_option(parser[1]);
+        Option& opt = get_scope(parser[0], context).options().get_local_option(parser[1]);
         if (parser.has_option("add"))
             opt.add_from_string(parser[2]);
         else
@@ -920,22 +898,22 @@ const CommandDesc declare_option_cmd = {
         if (parser.has_option("docstring"))
             docstring = parser.option_value("docstring");
 
-        GlobalOptions& opts = GlobalOptions::instance();
+        OptionsRegistry& reg = GlobalScope::instance().option_registry();
 
         if (parser[0] == "int")
-            opt = &opts.declare_option<int>(parser[1], docstring, 0, flags);
+            opt = &reg.declare_option<int>(parser[1], docstring, 0, flags);
         else if (parser[0] == "bool")
-            opt = &opts.declare_option<bool>(parser[1], docstring, 0, flags);
+            opt = &reg.declare_option<bool>(parser[1], docstring, 0, flags);
         else if (parser[0] == "str")
-            opt = &opts.declare_option<String>(parser[1], docstring, "", flags);
+            opt = &reg.declare_option<String>(parser[1], docstring, "", flags);
         else if (parser[0] == "regex")
-            opt = &opts.declare_option<Regex>(parser[1], docstring, Regex{}, flags);
+            opt = &reg.declare_option<Regex>(parser[1], docstring, Regex{}, flags);
         else if (parser[0] == "int-list")
-            opt = &opts.declare_option<std::vector<int>>(parser[1], docstring, {}, flags);
+            opt = &reg.declare_option<std::vector<int>>(parser[1], docstring, {}, flags);
         else if (parser[0] == "str-list")
-            opt = &opts.declare_option<std::vector<String>>(parser[1], docstring, {}, flags);
+            opt = &reg.declare_option<std::vector<String>>(parser[1], docstring, {}, flags);
         else if (parser[0] == "line-flag-list")
-            opt = &opts.declare_option<std::vector<LineAndFlag>>(parser[1], docstring, {}, flags);
+            opt = &reg.declare_option<std::vector<LineAndFlag>>(parser[1], docstring, {}, flags);
         else
             throw runtime_error("unknown type " + parser[0]);
 
@@ -944,15 +922,6 @@ const CommandDesc declare_option_cmd = {
     }
 };
 
-KeymapManager& get_keymap_manager(const String& scope, Context& context)
-{
-    if (prefix_match("global", scope)) return GlobalKeymaps::instance();
-    if (prefix_match("buffer", scope)) return context.buffer().keymaps();
-    if (prefix_match("window", scope)) return context.window().keymaps();
-
-    throw runtime_error("error: no such keymap container " + scope);
-}
-
 KeymapMode parse_keymap_mode(const String& str)
 {
     if (prefix_match("normal", str)) return KeymapMode::Normal;
@@ -997,7 +966,7 @@ const CommandDesc map_key_cmd = {
     },
     [](const ParametersParser& parser, Context& context)
     {
-        KeymapManager& keymaps = get_keymap_manager(parser[0], context);
+        KeymapManager& keymaps = get_scope(parser[0], context).keymaps();
         KeymapMode keymap_mode = parse_keymap_mode(parser[1]);
 
         KeyList key = parse_keys(parser[2]);
@@ -1419,7 +1388,7 @@ static void register_command(CommandManager& cm, const CommandDesc& c)
 {
     cm.register_command(c.name, c.func, c.docstring, c.params, c.flags, c.completer);
     if (c.alias)
-        GlobalAliases::instance().add_alias(c.alias, c.name);
+        GlobalScope::instance().aliases().add_alias(c.alias, c.name);
 }
 
 void register_commands()
diff --git a/src/context.cc b/src/context.cc
index 883df5ee..4c72c2bf 100644
--- a/src/context.cc
+++ b/src/context.cc
@@ -54,40 +54,33 @@ UserInterface& Context::ui() const
     return client().ui();
 }
 
-OptionManager& Context::options() const
+Scope& Context::scope() const
 {
     if (has_window())
-        return window().options();
+        return window();
     if (has_buffer())
-        return buffer().options();
-    return GlobalOptions::instance();
+        return buffer();
+    return GlobalScope::instance();
+}
+
+OptionManager& Context::options() const
+{
+    return scope().options();
 }
 
 HookManager& Context::hooks() const
 {
-    if (has_window())
-        return window().hooks();
-    if (has_buffer())
-        return buffer().hooks();
-    return GlobalHooks::instance();
+    return scope().hooks();
 }
 
 KeymapManager& Context::keymaps() const
 {
-    if (has_window())
-        return window().keymaps();
-    if (has_buffer())
-        return buffer().keymaps();
-    return GlobalKeymaps::instance();
+    return scope().keymaps();
 }
 
 AliasRegistry& Context::aliases() const
 {
-    if (has_window())
-        return window().aliases();
-    if (has_buffer())
-        return buffer().aliases();
-    return GlobalAliases::instance();
+    return scope().aliases();
 }
 
 void Context::set_client(Client& client)
diff --git a/src/context.hh b/src/context.hh
index ad54773f..cd7abb23 100644
--- a/src/context.hh
+++ b/src/context.hh
@@ -10,6 +10,7 @@ namespace Kakoune
 class Window;
 class Buffer;
 class Client;
+class Scope;
 class InputHandler;
 class UserInterface;
 class DisplayLine;
@@ -58,6 +59,8 @@ public:
     void set_client(Client& client);
     void set_window(Window& window);
 
+    Scope& scope() const;
+
     OptionManager& options() const;
     HookManager& hooks() const;
     KeymapManager& keymaps() const;
diff --git a/src/highlighters.cc b/src/highlighters.cc
index 8acd83c8..be795e4f 100644
--- a/src/highlighters.cc
+++ b/src/highlighters.cc
@@ -395,7 +395,7 @@ HighlighterAndId create_regex_option_highlighter(HighlighterParameters params)
 
     String option_name = params[0];
     // verify option type now
-    GlobalOptions::instance()[option_name].get<Regex>();
+    GlobalScope::instance().options()[option_name].get<Regex>();
 
     auto get_regex = [option_name](const Context& context){
         return context.options()[option_name].get<Regex>();
@@ -412,7 +412,7 @@ HighlighterAndId create_line_option_highlighter(HighlighterParameters params)
     String option_name = params[0];
 
     get_face(facespec); // validate facespec
-    GlobalOptions::instance()[option_name].get<int>(); // verify option type now
+    GlobalScope::instance().options()[option_name].get<int>(); // verify option type now
 
     auto func = [=](const Context& context, HighlightFlags flags,
                     DisplayBuffer& display_buffer)
@@ -645,7 +645,7 @@ HighlighterAndId create_flag_lines_highlighter(HighlighterParameters params)
     Color bg = str_to_color(params[0]);
 
     // throw if wrong option type
-    GlobalOptions::instance()[option_name].get<std::vector<LineAndFlag>>();
+    GlobalScope::instance().options()[option_name].get<std::vector<LineAndFlag>>();
 
     auto func = [=](const Context& context, HighlightFlags flags,
                     DisplayBuffer& display_buffer)
diff --git a/src/hook_manager.hh b/src/hook_manager.hh
index dd1c6eeb..21aade05 100644
--- a/src/hook_manager.hh
+++ b/src/hook_manager.hh
@@ -27,17 +27,12 @@ private:
     HookManager()
         : m_parent(nullptr) {}
     // the only one allowed to construct a root hook manager
-    friend class GlobalHooks;
+    friend class Scope;
 
     HookManager* m_parent;
     std::unordered_map<String, id_map<HookFunc>> m_hook;
 };
 
-class GlobalHooks : public HookManager,
-                    public Singleton<GlobalHooks>
-{
-};
-
 }
 
 #endif // hook_manager_hh_INCLUDED
diff --git a/src/keymap_manager.hh b/src/keymap_manager.hh
index 489ad301..6521f69c 100644
--- a/src/keymap_manager.hh
+++ b/src/keymap_manager.hh
@@ -34,7 +34,7 @@ private:
     KeymapManager()
         : m_parent(nullptr) {}
     // the only one allowed to construct a root map manager
-    friend class GlobalKeymaps;
+    friend class Scope;
 
     KeymapManager* m_parent;
 
@@ -43,11 +43,6 @@ private:
     Keymap m_mapping;
 };
 
-class GlobalKeymaps : public KeymapManager,
-                      public Singleton<GlobalKeymaps>
-{
-};
-
 }
 
 #endif // keymap_manager_hh_INCLUDED
diff --git a/src/main.cc b/src/main.cc
index 4402d53c..f6154404 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -1,5 +1,4 @@
 #include "assert.hh"
-#include "alias_registry.hh"
 #include "buffer.hh"
 #include "buffer_manager.hh"
 #include "buffer_utils.hh"
@@ -12,15 +11,14 @@
 #include "face_registry.hh"
 #include "file.hh"
 #include "highlighters.hh"
-#include "hook_manager.hh"
-#include "keymap_manager.hh"
 #include "ncurses.hh"
-#include "option_manager.hh"
 #include "parameters_parser.hh"
 #include "register_manager.hh"
 #include "remote.hh"
 #include "shell_manager.hh"
+#include "scope.hh"
 #include "string.hh"
+#include "insert_completer.hh"
 #include "interned_string.hh"
 #include "window.hh"
 
@@ -187,6 +185,52 @@ void register_registers()
     }
 }
 
+void register_options()
+{
+    OptionsRegistry& reg = GlobalScope::instance().option_registry();
+
+    reg.declare_option("tabstop", "size of a tab character", 8);
+    reg.declare_option("indentwidth", "indentation width", 4);
+    reg.declare_option("scrolloff",
+                       "number of lines and columns to keep visible main cursor when scrolling",
+                       CharCoord{0,0});
+    reg.declare_option("eolformat", "end of line format: 'crlf' or 'lf'", "lf"_str);
+    reg.declare_option("BOM", "insert a byte order mark when writing buffer",
+                       "no"_str);
+    reg.declare_option("complete_prefix",
+                       "complete up to common prefix in tab completion",
+                       true);
+    reg.declare_option("incsearch",
+                       "incrementaly apply search/select/split regex",
+                       true);
+    reg.declare_option("autoinfo",
+                       "automatically display contextual help",
+                       1);
+    reg.declare_option("autoshowcompl",
+                       "automatically display possible completions for prompts",
+                       true);
+    reg.declare_option("aligntab",
+                       "use tab characters when possible for alignement",
+                       false);
+    reg.declare_option("ignored_files",
+                       "patterns to ignore when completing filenames",
+                       Regex{R"(^(\..*|.*\.(o|so|a))$)"});
+    reg.declare_option("disabled_hooks",
+                      "patterns to disable hooks whose group is matched",
+                      Regex{});
+    reg.declare_option("filetype", "buffer filetype", ""_str);
+    reg.declare_option("path", "path to consider when trying to find a file",
+                   std::vector<String>({ "./", "/usr/include" }));
+    reg.declare_option("completers", "insert mode completers to execute.",
+                       std::vector<InsertCompleterDesc>({
+                           InsertCompleterDesc{ InsertCompleterDesc::Filename },
+                           InsertCompleterDesc{ InsertCompleterDesc::Word, "all"_str }
+                       }), OptionFlags::None);
+    reg.declare_option("autoreload",
+                       "autoreload buffer when a filesystem modification is detected",
+                       Ask);
+}
+
 void create_local_client(const String& init_command)
 {
     class LocalNCursesUI : public NCursesUI
@@ -298,10 +342,7 @@ int run_server(StringView session, StringView init_command,
 
     StringRegistry      string_registry;
     EventManager        event_manager;
-    GlobalOptions       global_options;
-    GlobalHooks         global_hooks;
-    GlobalKeymaps       global_keymaps;
-    GlobalAliases       global_aliases;
+    GlobalScope         global_scope;
     ShellManager        shell_manager;
     CommandManager      command_manager;
     BufferManager       buffer_manager;
@@ -313,6 +354,7 @@ int run_server(StringView session, StringView init_command,
 
     run_unit_tests();
 
+    register_options();
     register_env_vars();
     register_registers();
     register_commands();
@@ -339,7 +381,7 @@ int run_server(StringView session, StringView init_command,
 
     {
         Context empty_context;
-        global_hooks.run_hook("KakBegin", "", empty_context);
+        global_scope.hooks().run_hook("KakBegin", "", empty_context);
     }
 
     if (not files.empty()) try
@@ -372,7 +414,7 @@ int run_server(StringView session, StringView init_command,
 
     {
         Context empty_context;
-        global_hooks.run_hook("KakEnd", "", empty_context);
+        global_scope.hooks().run_hook("KakEnd", "", empty_context);
     }
 
     return 0;
@@ -381,14 +423,12 @@ int run_server(StringView session, StringView init_command,
 int run_filter(StringView keystr, memoryview<StringView> files)
 {
     StringRegistry  string_registry;
-    GlobalOptions   global_options;
-    GlobalHooks     global_hooks;
-    GlobalKeymaps   global_keymaps;
-    GlobalAliases   global_aliases;
+    GlobalScope     global_scope;
     ShellManager    shell_manager;
     BufferManager   buffer_manager;
     RegisterManager register_manager;
 
+    register_options();
     register_env_vars();
     register_registers();
 
diff --git a/src/option_manager.cc b/src/option_manager.cc
index 8b7c2f76..5330e05a 100644
--- a/src/option_manager.cc
+++ b/src/option_manager.cc
@@ -1,11 +1,7 @@
 #include "option_manager.hh"
 
-#include "insert_completer.hh"
-
 #include "assert.hh"
 
-#include <sstream>
-
 namespace Kakoune
 {
 
@@ -128,49 +124,4 @@ void OptionManager::on_option_changed(const Option& option)
         watcher->on_option_changed(option);
 }
 
-GlobalOptions::GlobalOptions()
-    : OptionManager()
-{
-    declare_option("tabstop", "size of a tab character", 8);
-    declare_option("indentwidth", "indentation width", 4);
-    declare_option("scrolloff",
-                   "number of lines and columns to keep visible main cursor when scrolling",
-                   CharCoord{0,0});
-    declare_option("eolformat", "end of line format: 'crlf' or 'lf'", "lf"_str);
-    declare_option("BOM", "insert a byte order mark when writing buffer",
-                   "no"_str);
-    declare_option("complete_prefix",
-                   "complete up to common prefix in tab completion",
-                   true);
-    declare_option("incsearch",
-                   "incrementaly apply search/select/split regex",
-                   true);
-    declare_option("autoinfo",
-                   "automatically display contextual help",
-                   1);
-    declare_option("autoshowcompl",
-                   "automatically display possible completions for prompts",
-                   true);
-    declare_option("aligntab",
-                   "use tab characters when possible for alignement",
-                   false);
-    declare_option("ignored_files",
-                   "patterns to ignore when completing filenames",
-                   Regex{R"(^(\..*|.*\.(o|so|a))$)"});
-    declare_option("disabled_hooks",
-                   "patterns to disable hooks whose group is matched",
-                   Regex{});
-    declare_option("filetype", "buffer filetype", ""_str);
-    declare_option("path", "path to consider when trying to find a file",
-                   std::vector<String>({ "./", "/usr/include" }));
-    declare_option("completers", "insert mode completers to execute.",
-                    std::vector<InsertCompleterDesc>({
-                        InsertCompleterDesc{ InsertCompleterDesc::Filename },
-                        InsertCompleterDesc{ InsertCompleterDesc::Word, "all"_str }
-                    }), OptionFlags::None);
-    declare_option("autoreload",
-                   "autoreload buffer when a filesystem modification is detected",
-                    Ask);
-}
-
 }
diff --git a/src/option_manager.hh b/src/option_manager.hh
index 00cd0370..058c8ea6 100644
--- a/src/option_manager.hh
+++ b/src/option_manager.hh
@@ -104,7 +104,8 @@ private:
     OptionManager()
         : m_parent(nullptr) {}
     // the only one allowed to construct a root option manager
-    friend class GlobalOptions;
+    friend class Scope;
+    friend class OptionsRegistry;
 
     template<typename MatchingFunc>
     CandidateList get_matching_names(MatchingFunc func);
@@ -186,34 +187,37 @@ auto find_option(T& container, const String& name) -> decltype(container.begin()
     return find_if(container, [&name](const ptr_type& opt) { return opt->name() == name; });
 }
 
-class GlobalOptions : public OptionManager,
-                      public Singleton<GlobalOptions>
+class OptionsRegistry
 {
 public:
-    GlobalOptions();
+    OptionsRegistry(OptionManager& global_manager) : m_global_manager(global_manager) {}
 
     template<typename T>
     Option& declare_option(const String& name, const String& docstring,
                            const T& value,
                            OptionFlags flags = OptionFlags::None)
     {
-        auto it = find_option(m_options, name);
-        if (it != m_options.end())
+        auto& opts = m_global_manager.m_options;
+        auto it = find_option(opts, name);
+        if (it != opts.end())
         {
             if ((*it)->is_of_type<T>() and (*it)->flags() == flags)
                 return **it;
             throw runtime_error("option " + name + " already declared with different type or flags");
         }
         m_descs.emplace_back(new OptionDesc{name, docstring, flags});
-        m_options.emplace_back(new TypedOption<T>{*this, *m_descs.back(), value});
-        return *m_options.back();
+        opts.emplace_back(new TypedOption<T>{m_global_manager, *m_descs.back(), value});
+        return *opts.back();
     }
 
     bool option_exists(const String& name) const
     {
-        return find_option(m_options, name) != m_options.end();
+        return find_if(m_descs, [&name](const std::unique_ptr<OptionDesc>& opt) {
+                           return opt->name() == name;
+                       }) != m_descs.end();
     }
 private:
+    OptionManager& m_global_manager;
     std::vector<std::unique_ptr<OptionDesc>> m_descs;
 };
 
diff --git a/src/scope.hh b/src/scope.hh
new file mode 100644
index 00000000..0fb99f8d
--- /dev/null
+++ b/src/scope.hh
@@ -0,0 +1,53 @@
+#ifndef scope_hh_INCLUDED
+#define scope_hh_INCLUDED
+
+#include "alias_registry.hh"
+#include "hook_manager.hh"
+#include "keymap_manager.hh"
+#include "option_manager.hh"
+
+namespace Kakoune
+{
+
+class Scope
+{
+public:
+    Scope(Scope& parent)
+          : m_options(parent.options()),
+            m_hooks(parent.hooks()),
+            m_keymaps(parent.keymaps()),
+            m_aliases(parent.aliases()) {}
+
+    OptionManager&       options()       { return m_options; }
+    const OptionManager& options() const { return m_options; }
+    HookManager&         hooks()         { return m_hooks; }
+    const HookManager&   hooks()   const { return m_hooks; }
+    KeymapManager&       keymaps()       { return m_keymaps; }
+    const KeymapManager& keymaps() const { return m_keymaps; }
+    AliasRegistry&       aliases()       { return m_aliases; }
+    const AliasRegistry& aliases() const { return m_aliases; }
+
+private:
+    friend class GlobalScope;
+    Scope() = default;
+
+    OptionManager m_options;
+    HookManager   m_hooks;
+    KeymapManager m_keymaps;
+    AliasRegistry m_aliases;
+};
+
+class GlobalScope : public Scope, public Singleton<GlobalScope>
+{
+    public:
+        GlobalScope() : m_option_registry(m_options) {}
+
+        OptionsRegistry& option_registry() { return m_option_registry; }
+        const OptionsRegistry& option_registry() const { return m_option_registry; }
+    private:
+        OptionsRegistry m_option_registry;
+};
+
+}
+
+#endif // scope_hh_INCLUDED
diff --git a/src/window.cc b/src/window.cc
index 5adf685c..c7eaf686 100644
--- a/src/window.cc
+++ b/src/window.cc
@@ -18,22 +18,19 @@ void expand_tabulations(const Context& context, HighlightFlags flags, DisplayBuf
 void expand_unprintable(const Context& context, HighlightFlags flags, DisplayBuffer& display_buffer);
 
 Window::Window(Buffer& buffer)
-    : m_buffer(&buffer),
-      m_hooks(buffer.hooks()),
-      m_options(buffer.options()),
-      m_keymaps(buffer.keymaps()),
-      m_aliases(buffer.aliases())
+    : Scope(buffer),
+      m_buffer(&buffer)
 {
     InputHandler hook_handler{{ *m_buffer, Selection{} }};
     hook_handler.context().set_window(*this);
-    m_hooks.run_hook("WinCreate", buffer.name(), hook_handler.context());
-    m_options.register_watcher(*this);
+    hooks().run_hook("WinCreate", buffer.name(), hook_handler.context());
+    options().register_watcher(*this);
 
     m_builtin_highlighters.add_child({"tabulations"_str, make_simple_highlighter(expand_tabulations)});
     m_builtin_highlighters.add_child({"unprintable"_str, make_simple_highlighter(expand_unprintable)});
     m_builtin_highlighters.add_child({"selections"_str,  make_simple_highlighter(highlight_selections)});
 
-    for (auto& option : m_options.flatten_options())
+    for (auto& option : options().flatten_options())
         on_option_changed(*option);
 }
 
@@ -41,8 +38,8 @@ Window::~Window()
 {
     InputHandler hook_handler{{ *m_buffer, Selection{} }};
     hook_handler.context().set_window(*this);
-    m_hooks.run_hook("WinClose", buffer().name(), hook_handler.context());
-    m_options.unregister_watcher(*this);
+    hooks().run_hook("WinClose", buffer().name(), hook_handler.context());
+    options().unregister_watcher(*this);
 }
 
 void Window::display_line_at(LineCount buffer_line, LineCount display_line)
@@ -279,7 +276,7 @@ void Window::on_option_changed(const Option& option)
     String desc = option.name() + "=" + option.get_as_string();
     InputHandler hook_handler{{ *m_buffer, Selection{} }};
     hook_handler.context().set_window(*this);
-    m_hooks.run_hook("WinSetOption", desc, hook_handler.context());
+    hooks().run_hook("WinSetOption", desc, hook_handler.context());
 
     // an highlighter might depend on the option, so we need to redraw
     forget_timestamp();
diff --git a/src/window.hh b/src/window.hh
index 8a51ad4a..e2bb91b1 100644
--- a/src/window.hh
+++ b/src/window.hh
@@ -1,21 +1,18 @@
 #ifndef window_hh_INCLUDED
 #define window_hh_INCLUDED
 
-#include "alias_registry.hh"
 #include "completion.hh"
 #include "display_buffer.hh"
 #include "highlighter_group.hh"
 #include "selection.hh"
-#include "hook_manager.hh"
-#include "option_manager.hh"
-#include "keymap_manager.hh"
 #include "safe_ptr.hh"
+#include "scope.hh"
 
 namespace Kakoune
 {
 
 // A Window is a view onto a Buffer
-class Window : public SafeCountable, public OptionManagerWatcher
+class Window : public SafeCountable, public OptionManagerWatcher, public Scope
 {
 public:
     Window(Buffer& buffer);
@@ -39,15 +36,6 @@ public:
 
     Highlighter& highlighters() { return m_highlighters; }
 
-    OptionManager&       options()       { return m_options; }
-    const OptionManager& options() const { return m_options; }
-    HookManager&         hooks()         { return m_hooks; }
-    const HookManager&   hooks()   const { return m_hooks; }
-    KeymapManager&       keymaps()       { return m_keymaps; }
-    const KeymapManager& keymaps() const { return m_keymaps; }
-    AliasRegistry&       aliases()       { return m_aliases; }
-    const AliasRegistry& aliases() const { return m_aliases; }
-
     Buffer& buffer() const { return *m_buffer; }
 
     size_t timestamp() const { return m_timestamp; }
@@ -67,11 +55,6 @@ private:
     CharCoord m_dimensions;
     DisplayBuffer m_display_buffer;
 
-    HookManager      m_hooks;
-    OptionManager    m_options;
-    KeymapManager    m_keymaps;
-    AliasRegistry    m_aliases;
-
     HighlighterGroup m_highlighters;
     HighlighterGroup m_builtin_highlighters;