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Use menu behavior for completing builtins where appropriate

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This allows to select completions without pressing Tab.

There are two different obvious ways to add the menu bit.
1. When creating the "Completions" object, pass the
   Completions::Flags::Menu parameter.
2. If there is a completer function like "complete_scope", wrap
   it, e.g. "menu(complete_scope)".

I have settled on always using 2 if there is a completer function
and 1 otherwise.
The advantage of 2 over 1 is that it allows to use the completer
function in a context where we don't want the menu behavior
(e.g. "complete-command").

---

Now the only* completion type where we usually don't use menu behavior
is file completion. Unfortunately, menu behavior has poor interaction
with directories' trailing slashes. Consider this (contrived) example:

	define-command ls -docstring "list directory contents" -params .. %{
		echo -- %sh{ls "$@"}
	}
	complete-command -menu ls file

Run ":ls kakoun<ret>".  The prompt expands to ":ls kakoune/"
before executing. Next, run ":<c-p>".  This recalls ":ls kakoune/"
and immediately selects the first completion, so on validation,
the command will be ":ls kakoune/colors/", which is weird.

[*] Also, expansions like %val{bufname} also don't use menu
behavior.  It wouldn't add value since validation doesn't add a
closing delimiter. I have an experimental patch that adds closing
delimiters automatically but I'm not sure if that's the right
direction.
This commit is contained in:
Johannes Altmanninger 2022-07-19 12:58:14 +02:00
parent 0b5dcf062f
commit 031de6d28c
1 changed files with 19 additions and 13 deletions
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32
src/commands.cc
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@ -972,7 +972,7 @@ const CommandDesc arrange_buffers_cmd = {
CommandHelper{}, CommandHelper{},
[](const Context& context, CompletionFlags flags, CommandParameters params, size_t, ByteCount cursor_pos) [](const Context& context, CompletionFlags flags, CommandParameters params, size_t, ByteCount cursor_pos)
{ {
return complete_buffer_name<false>(context, flags, params.back(), cursor_pos); return menu(complete_buffer_name<false>)(context, flags, params.back(), cursor_pos);
}, },
[](const ParametersParser& parser, Context&, const ShellContext&) [](const ParametersParser& parser, Context&, const ShellContext&)
{ {
@ -1094,7 +1094,7 @@ const CommandDesc add_hook_cmd = {
}, },
CommandFlags::None, CommandFlags::None,
CommandHelper{}, CommandHelper{},
make_completer(menu(complete_scope),complete_hooks, complete_nothing, make_completer(menu(complete_scope), menu(complete_hooks), complete_nothing,
[](const Context& context, CompletionFlags flags, [](const Context& context, CompletionFlags flags,
StringView prefix, ByteCount cursor_pos) StringView prefix, ByteCount cursor_pos)
{ return CommandManager::instance().complete( { return CommandManager::instance().complete(
@ -1138,7 +1138,8 @@ const CommandDesc remove_hook_cmd = {
{ {
if (auto scope = get_scope_ifp(params[0], context)) if (auto scope = get_scope_ifp(params[0], context))
return { 0_byte, params[0].length(), return { 0_byte, params[0].length(),
scope->hooks().complete_hook_group(params[1], pos_in_token) }; scope->hooks().complete_hook_group(params[1], pos_in_token),
Completions::Flags::Menu };
} }
return {}; return {};
}, },
@ -1478,7 +1479,7 @@ const CommandDesc debug_cmd = {
StringView prefix, ByteCount cursor_pos) -> Completions { StringView prefix, ByteCount cursor_pos) -> Completions {
auto c = {"info", "buffers", "options", "memory", "shared-strings", auto c = {"info", "buffers", "options", "memory", "shared-strings",
"profile-hash-maps", "faces", "mappings", "regex", "registers"}; "profile-hash-maps", "faces", "mappings", "regex", "registers"};
return { 0_byte, cursor_pos, complete(prefix, cursor_pos, c) }; return { 0_byte, cursor_pos, complete(prefix, cursor_pos, c), Completions::Flags::Menu };
}), }),
[](const ParametersParser& parser, Context& context, const ShellContext&) [](const ParametersParser& parser, Context& context, const ShellContext&)
{ {
@ -1682,7 +1683,8 @@ const CommandDesc set_option_cmd = {
return menu(complete_scope_including_current)(context, flags, params[0], pos_in_token); return menu(complete_scope_including_current)(context, flags, params[0], pos_in_token);
else if (token_to_complete == 1) else if (token_to_complete == 1)
return { 0_byte, params[1].length(), return { 0_byte, params[1].length(),
GlobalScope::instance().option_registry().complete_option_name(params[1], pos_in_token) }; GlobalScope::instance().option_registry().complete_option_name(params[1], pos_in_token),
Completions::Flags::Menu };
else if (token_to_complete == 2 and params[2].empty() and else if (token_to_complete == 2 and params[2].empty() and
GlobalScope::instance().option_registry().option_exists(params[1])) GlobalScope::instance().option_registry().option_exists(params[1]))
{ {
@ -1718,7 +1720,8 @@ Completions complete_option(const Context& context, CompletionFlags flags,
return menu(complete_scope_no_global)(context, flags, params[0], pos_in_token); return menu(complete_scope_no_global)(context, flags, params[0], pos_in_token);
else if (token_to_complete == 1) else if (token_to_complete == 1)
return { 0_byte, params[1].length(), return { 0_byte, params[1].length(),
GlobalScope::instance().option_registry().complete_option_name(params[1], pos_in_token) }; GlobalScope::instance().option_registry().complete_option_name(params[1], pos_in_token),
Completions::Flags::Menu };
return Completions{}; return Completions{};
} }
@ -1786,7 +1789,7 @@ const CommandDesc declare_option_cmd = {
[](const Context& context, CompletionFlags flags, [](const Context& context, CompletionFlags flags,
StringView prefix, ByteCount cursor_pos) -> Completions { StringView prefix, ByteCount cursor_pos) -> Completions {
auto c = {"int", "bool", "str", "regex", "int-list", "str-list", "completions", "line-specs", "range-specs", "str-to-str-map"}; auto c = {"int", "bool", "str", "regex", "int-list", "str-list", "completions", "line-specs", "range-specs", "str-to-str-map"};
return { 0_byte, cursor_pos, complete(prefix, cursor_pos, c) }; return { 0_byte, cursor_pos, complete(prefix, cursor_pos, c), Completions::Flags::Menu };
}), }),
[](const ParametersParser& parser, Context& context, const ShellContext&) [](const ParametersParser& parser, Context& context, const ShellContext&)
{ {
@ -1839,7 +1842,8 @@ static Completions map_key_completer(const Context& context, CompletionFlags fla
{ {
auto& user_modes = get_scope(params[0], context).keymaps().user_modes(); auto& user_modes = get_scope(params[0], context).keymaps().user_modes();
return { 0_byte, params[1].length(), return { 0_byte, params[1].length(),
complete(params[1], pos_in_token, concatenated(modes, user_modes)) }; complete(params[1], pos_in_token, concatenated(modes, user_modes)),
Completions::Flags::Menu };
} }
if (unmap and token_to_complete == 2) if (unmap and token_to_complete == 2)
{ {
@ -1850,7 +1854,8 @@ static Completions map_key_completer(const Context& context, CompletionFlags fla
return { 0_byte, params[2].length(), return { 0_byte, params[2].length(),
complete(params[2], pos_in_token, complete(params[2], pos_in_token,
keys | transform([](Key k) { return key_to_str(k); }) keys | transform([](Key k) { return key_to_str(k); })
| gather<Vector<String>>()) }; | gather<Vector<String>>()),
Completions::Flags::Menu };
} }
return {}; return {};
} }
@ -2465,7 +2470,7 @@ const CommandDesc unset_face_cmd = {
double_params, double_params,
CommandFlags::None, CommandFlags::None,
face_doc_helper, face_doc_helper,
make_completer(menu(complete_scope), complete_face), make_completer(menu(complete_scope), menu(complete_face)),
[](const ParametersParser& parser, Context& context, const ShellContext&) [](const ParametersParser& parser, Context& context, const ShellContext&)
{ {
get_scope(parser[0], context).faces().remove_face(parser[1]); get_scope(parser[0], context).faces().remove_face(parser[1]);
@ -2653,7 +2658,8 @@ const CommandDesc enter_user_mode_cmd = {
if (token_to_complete == 0) if (token_to_complete == 0)
{ {
return { 0_byte, params[0].length(), return { 0_byte, params[0].length(),
complete(params[0], pos_in_token, context.keymaps().user_modes()) }; complete(params[0], pos_in_token, context.keymaps().user_modes()),
Completions::Flags::Menu };
} }
return {}; return {};
}, },
@ -2698,10 +2704,10 @@ const CommandDesc require_module_cmd = {
single_param, single_param,
CommandFlags::None, CommandFlags::None,
CommandHelper{}, CommandHelper{},
make_completer( make_completer(menu(
[](const Context&, CompletionFlags, StringView prefix, ByteCount cursor_pos) { [](const Context&, CompletionFlags, StringView prefix, ByteCount cursor_pos) {
return CommandManager::instance().complete_module_name(prefix.substr(0, cursor_pos)); return CommandManager::instance().complete_module_name(prefix.substr(0, cursor_pos));
}), })),
[](const ParametersParser& parser, Context& context, const ShellContext&) [](const ParametersParser& parser, Context& context, const ShellContext&)
{ {
CommandManager::instance().load_module(parser[0], context); CommandManager::instance().load_module(parser[0], context);