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%%%----------------------------------------------------------------------
%%% File : edit_extended.erl
%%% Author : Luke Gorrie <luke@bluetail.com>
%%% Purpose : execute-extended-command (emacs lingo)
%%% Created : 14 Jan 2001 by Luke Gorrie <luke@bluetail.com>
%%%----------------------------------------------------------------------
-module(edit_extended).
-author('luke@bluetail.com').
-include_lib("ermacs/include/edit.hrl").
-compile(export_all).
-compile({parse_transform, edit_transform}).
extended_command(State, Mod, Func, Args) ->
{Params, _Doc} = find_cmd_info(Mod, Func),
NewState = execute(State, Mod, Func, Args, Params),
NewState#state{lastcmd={Mod, Func, Args}}.
execute(State, Mod, Func, Args, []) ->
case catch apply(Mod, Func, [State | Args]) of
S when record(S, state) ->
S;
{'EXIT', Rsn} ->
io:format("** Crash: ~p~n", [Rsn]),
edit_util:popup_message(State, '*Error*', "** Crash: ~p", [Rsn]);
Other ->
State
end;
execute(State, Mod, Func, Args, Params)
when State#state.pending_cmd /= undefined ->
edit_util:status_msg(State, "Minibuffer busy!");
execute(State, Mod, Func, Args, Params) ->
Cont = make_execute_continuation(Mod, Func, Args, Params),
{Type, Prompt} = hd(Params),
edit_var:set(extended_arg_type, Type),
edit_complete:completion_init(Type),
default_init(State, Type),
State1 = activate_continuation(State, Cont, Prompt ++ " "),
State2 = edit_util:select_window(State1,
fun(W) ->
W#window.minibuffer
end),
case State#state.pending_win of
undefined ->
State2#state{pending_win=(State#state.curwin)#window.id};
_ ->
State2
end.
default_init(State, file) ->
edit_buf:set_text(minibuffer, edit_util:pwd(State));
default_init(State, _) ->
ok.
make_execute_continuation(Mod, Func, Args, Params) ->
fun(State, NewArg) ->
State1 = if length(Params) == 1 ->
%% last argument, we're done!
deactivate_continuation(State);
true ->
State
end,
execute(State1, Mod, Func, Args ++ [NewArg], tl(Params))
end.
activate_continuation(State, C, Prompt) ->
State1 = State#state{pending_cmd=C},
Enabler = fun(Win) -> Win#window{active=true, prefix=Prompt} end,
edit_util:update_minibuffer_window(State1, Enabler).
deactivate_continuation(State) ->
edit_buf:set_text(minibuffer, ""),
State1 = State#state{pending_cmd=undefined},
Disabler = fun(Win) -> Win#window{active=false, prefix=""}
end,
%% disable minibuffer
State2 = edit_util:update_minibuffer_window(State1, Disabler),
%% reselect the window that the command is being done in
State3 =
edit_util:select_window(State2,
fun(W) ->
W#window.id == State2#state.pending_win
end),
State4 = State3#state{pending_win=undefined}.
find_cmd_info(Mod, Func) ->
case catch Mod:command_info() of
{'EXIT', _} ->
{[], ""};
L when list(L) ->
case lists:keysearch(Func, 1, L) of
{value, {_, Params, Doc}} ->
{Params, Doc};
_ ->
{[], ""}
end
end.
%% Callbacks from key bindings
take_argument(State) when State#state.pending_cmd /= undefined ->
Text = edit_buf:get_text(minibuffer),
edit_history:add(history_var_name(), Text),
Cont = State#state.pending_cmd,
Cont(State, Text).
abort(State) ->
io:format("Aborted!~n"),
State1 = deactivate_continuation(State).
%% M-x
-command({execute_extended_command,
[{mod_func, "M-x"}],
"Like M-x in emacs."}).
execute_extended_command(State, MF) ->
case string:tokens(MF, " :") of
[ModStr, FunStr] ->
Mod = list_to_atom(ModStr),
Fun = list_to_atom(FunStr),
edit:invoke_extended_async(Mod, Fun, []),
State;
_ ->
edit_util:status_msg(State, "Bad string; must be \"Mod:Fun\"")
end.
%% History
history_move(State, Dir) ->
edit_history:move(State, history_var_name(), history_region_fun(), Dir).
-command({history_search, [{history_regexp, "History regexp:"}]}).
%% FIXME: This function fails when it tries to activate the minibuffer to
%% search regexp, but the minibuffer is already active.
history_search(State, RE) ->
edit_history:search(State, history_var_name(), history_region_fun(), RE).
history_var_name() ->
TypeString = atom_to_list(edit_var:lookup(extended_arg_type)),
list_to_atom("extended_history:" ++ TypeString).
history_region_fun() ->
fun(Buf) -> {1, edit_buf:point_max(Buf)} end.
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