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Diffstat (limited to 'lib/et/src/et_gs_viewer.erl')
| -rw-r--r-- | lib/et/src/et_gs_viewer.erl | 1483 |
1 files changed, 1483 insertions, 0 deletions
diff --git a/lib/et/src/et_gs_viewer.erl b/lib/et/src/et_gs_viewer.erl new file mode 100644 index 0000000000..7235269aff --- /dev/null +++ b/lib/et/src/et_gs_viewer.erl @@ -0,0 +1,1483 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2009-2010. All Rights Reserved. +%% +%% The contents of this file are subject to the Erlang Public License, +%% Version 1.1, (the "License"); you may not use this file except in +%% compliance with the License. You should have received a copy of the +%% Erlang Public License along with this software. If not, it can be +%% retrieved online at http://www.erlang.org/. +%% +%% Software distributed under the License is distributed on an "AS IS" +%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +%% the License for the specific language governing rights and limitations +%% under the License. +%% +%% %CopyrightEnd% +%% +%%---------------------------------------------------------------------- +%% Purpose: Displays a sequence chart for trace events (messages/actions) +%%---------------------------------------------------------------------- + +-module(et_gs_viewer). + +-behaviour(gen_server). + +%% External exports +-export([start_link/1]). + +%% gen_server callbacks +-export([init/1, terminate/2, code_change/3, + handle_call/3, handle_cast/2, handle_info/2]). + +-include("../include/et.hrl"). +-include("et_internal.hrl"). + +-define(unknown, "UNKNOWN"). + +-record(state, + {parent_pid, % Pid of parent process + collector_pid, % Pid of collector process + event_order, % Field to be used as primary key + trace_pattern, % Collector trace pattern + active_filter, % Name of the active filter + filters, % List of possible filters + selected_actor, % Actor selected by user + first_event, % Key of first event (regardless of visibility) + last_event, % Key of last event (regardless of visibility) + max_events, % Maximum number of shown events + events, % Queue containg all event keys (regardless of visibility) + max_actors, % Maximum number of shown actors + actors, % List of known actors + refresh_needed, % Refresh is needed in order to show all actors + display_mode, % Display all or only matching actors + detail_level, % Show only events with lesser detail level + hide_actions, % Hide/show events where to == from actor (bool) + hide_unknown, % Hide/show events with unknown actor (bool) + is_suspended, % Suspend viewer updates (bool) + title, % GUI: Window title + win, % GUI: Window object + menubar, % GUI: Menu bar object + packer, % GUI: Packer object + width, % GUI: Window width + height, % GUI: Window height + scale, % GUI: Scaling factor on canvas + font, % GUI: Font to be used on text labels + canvas_width, % GUI: Canvas width + canvas_height, % GUI: Canvas height + canvas, % GUI: Canvas object + y_pos}). % GUI: Current y position on canvas + +-record(actor, {name, string}). + +-define(initial_x, 10). +-define(incr_x, 60). +-define(initial_y, 15). +-define(incr_y, 15). +-define(detail_level_min, 0). +-define(detail_level_max, 100). + +%%%---------------------------------------------------------------------- +%%% Client side +%%%---------------------------------------------------------------------- + +start_link(Options) -> + case parse_opt(Options, default_state(), []) of + {ok, S, CollectorOpt} -> + case S#state.collector_pid of + CollectorPid when is_pid(CollectorPid) -> + case gen_server:start_link(?MODULE, [S], []) of + {ok, Pid} when S#state.parent_pid =/= self() -> + unlink(Pid), + {ok, Pid}; + Other -> + Other + end; + undefined -> + case et_collector:start_link(CollectorOpt) of + {ok, CollectorPid} -> + S2 = S#state{collector_pid = CollectorPid}, + case gen_server:start_link(?MODULE, [S2], []) of + {ok, Pid} when S#state.parent_pid =/= self() -> + unlink(Pid), + {ok, Pid}; + Other -> + Other + end; + {error, Reason} -> + {error, {et_collector, Reason}} + end + end; + {error, Reason} -> + {error, Reason} + end. + +default_state() -> + #state{parent_pid = self(), + collector_pid = undefined, + detail_level = ?detail_level_max, + active_filter = ?DEFAULT_FILTER_NAME, + filters = [?DEFAULT_FILTER], + event_order = trace_ts, + is_suspended = false, + max_events = 100, + first_event = first, + last_event = first, + events = queue_new(), + max_actors = 5, + actors = [create_actor(?unknown)], + selected_actor = ?unknown, + hide_actions = false, + hide_unknown = false, + refresh_needed = false, + display_mode = all, + scale = 2, + canvas_height = 0, + canvas_width = 0, + width = 800, + height = 600}. + +parse_opt([], S, CollectorOpt) -> + {ok, S, [{parent_pid, S#state.parent_pid} | CollectorOpt]}; +parse_opt([H | T], S, CollectorOpt) -> + case H of + {parent_pid, Parent} when Parent =:= undefined -> + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S#state{parent_pid = Parent}, CollectorOpt2); + {parent_pid, Parent} when is_pid(Parent) -> + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S#state{parent_pid = Parent}, CollectorOpt2); + {title, Title} -> + parse_opt(T, S#state{title = name_to_string(Title)}, CollectorOpt); + {detail_level, Level} when is_integer(Level), + Level >= ?detail_level_min, + Level =< ?detail_level_max -> + parse_opt(T, S#state{detail_level = Level}, CollectorOpt); + {detail_level, max} -> + parse_opt(T, S#state{detail_level = ?detail_level_max}, CollectorOpt); + {detail_level, min} -> + parse_opt(T, S#state{detail_level = ?detail_level_min}, CollectorOpt); + {is_suspended, true} -> + parse_opt(T, S#state{is_suspended = true}, CollectorOpt); + {is_suspended, false} -> + parse_opt(T, S#state{is_suspended = false}, CollectorOpt); + {scale, Scale} when is_integer(Scale), Scale > 0 -> + parse_opt(T, S#state{scale = Scale}, CollectorOpt); + {width, W} when is_integer(W), W > 0 -> + parse_opt(T, S#state{width = W, canvas_width = W}, CollectorOpt); + {height, WH} when is_integer(WH), WH > 0 -> + parse_opt(T, S#state{height = WH, canvas_height = WH}, CollectorOpt); + {collector_pid, Pid} when is_pid(Pid) -> + parse_opt(T, S#state{collector_pid = Pid}, CollectorOpt); + {collector_pid, undefined} -> + parse_opt(T, S#state{collector_pid = undefined}, CollectorOpt); + {active_filter, Name} when is_atom(Name) -> + parse_opt(T, S#state{active_filter = Name}, CollectorOpt); + {event_order, trace_ts} -> %% BUGBUG: Verify event_order with collector + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S#state{event_order = trace_ts}, CollectorOpt2); + {event_order, event_ts} -> %% BUGBUG: Verify event_order with collector + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S#state{event_order = event_ts}, CollectorOpt2); + {trace_port, _Port} -> + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S, CollectorOpt2); + {trace_max_queue, _Queue} -> + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S, CollectorOpt2); + {trace_pattern, _Pattern} -> + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S, CollectorOpt2); + {trace_global, _Boolean} -> + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S, CollectorOpt2); + {trace_client, _Client} -> + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S, CollectorOpt2); + {dict_insert, {filter, Name}, Fun} -> + if + is_atom(Name), is_function(Fun) -> + F = #filter{name = Name, function = Fun}, + Filters = lists:keydelete(Name, #filter.name, S#state.filters), + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S#state{filters = Filters ++ [F]}, CollectorOpt2); + true -> + {error, {bad_option, H}} + end; + {dict_insert, {subscriber, Pid}, _Val} -> + if + is_pid(Pid) -> + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S, CollectorOpt2); + true -> + {error, {bad_option, H}} + end; + {dict_insert, _Key, _Val} -> + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S, CollectorOpt2); + {dict_delete, {filter, Name}} -> + Filters = lists:keydelete(Name, #filter.name, S#state.filters), + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S#state{filters = Filters}, CollectorOpt2); + {dict_delete, _Key} -> + CollectorOpt2 = [H | CollectorOpt], + parse_opt(T, S, CollectorOpt2); + {max_events, Max} when is_integer(Max), Max > 0-> + parse_opt(T, S#state{max_events = Max}, CollectorOpt); + {max_events, Max} when Max =:= infinity -> + parse_opt(T, S#state{max_events = Max}, CollectorOpt); + {max_actors, Max} when is_integer(Max), Max >= 0-> + parse_opt(T, S#state{max_actors = Max}, CollectorOpt); + {max_actors, Max} when Max =:= infinity -> + parse_opt(T, S#state{max_actors = Max}, CollectorOpt); + {actors, ActorNames} when is_list(ActorNames) -> + ActorNames2 = + case lists:member(?unknown, ActorNames) of + false -> [?unknown | ActorNames]; + true -> ActorNames + end, + Actors = [create_actor(Name) || Name <- ActorNames2], + parse_opt(T, S#state{actors = Actors}, CollectorOpt); + {first_event, First} -> + parse_opt(T, S#state{first_event = First}, CollectorOpt); + {hide_unknown, Bool} when Bool =:= false -> + parse_opt(T, S#state{hide_unknown = Bool}, CollectorOpt); + {hide_unknown, Bool} when Bool =:= true -> + parse_opt(T, S#state{hide_unknown = Bool}, CollectorOpt); + {hide_actions, Bool} when Bool =:= false -> + parse_opt(T, S#state{hide_actions = Bool}, CollectorOpt); + {hide_actions, Bool} when Bool =:= true -> + parse_opt(T, S#state{hide_actions = Bool}, CollectorOpt); + {display_mode, Mode = all} -> + parse_opt(T, S#state{display_mode = Mode}, CollectorOpt); + {display_mode, Mode = {search_actors, Dir, _Key, Actors}} when is_list(Actors), Dir =:= forward -> + parse_opt(T, S#state{display_mode = Mode}, CollectorOpt); + {display_mode, Mode = {search_actors, Dir, _Key, Actors}} when is_list(Actors), Dir =:= reverse -> + parse_opt(T, S#state{display_mode = Mode}, CollectorOpt); + + Bad -> + {error, {bad_option, Bad}} + end; +parse_opt(BadList, _S, _CollectorOpt) -> + {error, {bad_option_list, BadList}}. + +do_dict_insert({filter, Name}, Fun, S) when is_atom(Name), is_function(Fun) -> + F = #filter{name = Name, function = Fun}, + Filters = lists:keydelete(Name, #filter.name, S#state.filters), + Filters2 = lists:keysort(#filter.name, [F | Filters]), + gs:destroy(filter_menu), + create_filter_menu(S#state.active_filter, Filters2), + S#state{filters = Filters2}; +do_dict_insert(_Key, _Val, S) -> + %% ok = error_logger:format("~p(~p): handle_info({et, {dict_insert, ~p, ~p}})~n", + %% [?MODULE, self(), Key, Val]), + S. + +do_dict_delete({filter, Name}, S) when is_atom(Name), Name =/= S#state.active_filter -> + Filters = lists:keydelete(Name, #filter.name, S#state.filters), + gs:destroy(filter_menu), + create_filter_menu(S#state.active_filter, Filters), + S#state{filters = Filters}; +do_dict_delete(_Key, S) -> + %% ok = error_logger:format("~p(~p): handle_info({et, {dict_delete, ~p}})~n", + %% [?MODULE, self(), Key]), + S. + +%%%---------------------------------------------------------------------- +%%% Callback functions from gen_server +%%%---------------------------------------------------------------------- + +%%---------------------------------------------------------------------- +%% Func: init/1 +%% Returns: {ok, State} | +%% {ok, State, Timeout} | +%% ignore | +%% {stop, Reason} +%%---------------------------------------------------------------------- + +init([S]) when is_record(S, state) -> + process_flag(trap_exit, true), + InitialTimeout = 0, + case S#state.parent_pid of + undefined -> + ignore; + Pid when is_pid(Pid) -> + link(Pid) + end, + et_collector:dict_insert(S#state.collector_pid, + {subscriber, self()}, + ?MODULE), + {ok, create_main_window(S), InitialTimeout}. + +%%---------------------------------------------------------------------- +%% Func: handle_call/3 +%% Returns: {reply, Reply, State} | +%% {reply, Reply, State, Timeout} | +%% {noreply, State} | +%% {noreply, State, Timeout} | +%% {stop, Reason, Reply, State} | (terminate/2 is called) +%% {stop, Reason, State} (terminate/2 is called) +%%---------------------------------------------------------------------- + +handle_call(get_collector_pid, _From, S) -> + Reply = S#state.collector_pid, + reply(Reply, S); +handle_call(stop, _From, S) -> + gs:destroy(S#state.win), + {stop, shutdown, ok, S}; +handle_call(Request, From, S) -> + ok = error_logger:format("~p(~p): handle_call(~p, ~p, ~p)~n", + [?MODULE, self(), Request, From, S]), + Reply = {error, {bad_request, Request}}, + reply(Reply, S). + +%%---------------------------------------------------------------------- +%% Func: handle_cast/2 +%% Returns: {noreply, State} | +%% {noreply, State, Timeout} | +%% {stop, Reason, State} (terminate/2 is called) +%%---------------------------------------------------------------------- + +handle_cast(Msg, S) -> + ok = error_logger:format("~p(~p): handle_cast(~p, ~p)~n", + [?MODULE, self(), Msg, S]), + noreply(S). + +%%---------------------------------------------------------------------- +%% Func: handle_info/2 +%% Returns: {noreply, State} | +%% {noreply, State, Timeout} | +%% {stop, Reason, State} (terminate/2 is called) +%%---------------------------------------------------------------------- + +handle_info({et, {more_events, _Size}}, S) -> + noreply(S); +handle_info({et, {insert_actors, ActorNames}}, S) when is_list(ActorNames) -> + Fun = fun(N, Actors) -> + case lists:keymember(N, #actor.name, Actors) of + true -> Actors; + false -> Actors ++ [create_actor(N)] + end + end, + Actors = lists:foldl(Fun, S#state.actors, ActorNames), + S2 = refresh_main_window(S#state{actors = Actors}), + noreply(S2); +handle_info({et, {delete_actors, ActorNames}}, S) when is_list(ActorNames)-> + Fun = fun(N, Actors) when N =:= ?unknown -> + Actors; + (N, Actors) -> + lists:keydelete(N, #actor.name, Actors) + end, + New = lists:foldl(Fun, S#state.actors, ActorNames), + S2 = refresh_main_window(S#state{actors = New}), + noreply(S2); +handle_info({et, {dict_insert, Key, Val}}, S) -> + S2 = do_dict_insert(Key, Val, S), + noreply(S2); +handle_info({et, {dict_delete, Key}}, S) -> + S2 = do_dict_delete(Key, S), + noreply(S2); +handle_info({et, first}, S) -> + S2 = scroll_first(S), + noreply(S2); +handle_info({et, prev}, S) -> + S2 = scroll_prev(S), + noreply(S2); +handle_info({et, next}, S) -> + S2 = scroll_next(S), + noreply(S2); +handle_info({et, last}, S) -> + S2 = scroll_last(S), + noreply(S2); +handle_info({et, refresh}, S) -> + S2 = refresh_main_window(S), + noreply(S2); +handle_info({et, {display_mode, Mode}}, S) -> + S2 = change_display_mode(Mode, S), + noreply(S2); +handle_info({et, close}, S) -> + gs:destroy(S#state.win), + {stop, shutdown, S}; +handle_info({gs, Button, click, Data, Other} = Click, S) -> + CollectorPid = S#state.collector_pid, + case Button of + close -> + gs:destroy(S#state.win), + {stop, shutdown, S}; + suspended -> + case Other of + [_Text, _Group, Bool | _] when Bool =:= true -> + S2 = do_suspend(S), + noreply(S2); + [_Text, _Group, Bool | _] when Bool =:= false -> + S2 = do_resume(S), + noreply(S2); + _ -> + click_error(Click, S), + noreply(S) + end; + hide_actions -> + case Other of + [_Text, _Group, Bool | _] when Bool =:= true -> + S2 = refresh_main_window(S#state{hide_actions = Bool}), + noreply(S2); + [_Text, _Group, Bool | _] when Bool =:= false -> + S2 = refresh_main_window(S#state{hide_actions = Bool}), + noreply(S2); + _ -> + click_error(Click, S), + noreply(S) + end; + hide_unknown -> + case Other of + [_Text, _Group, Bool | _] when Bool =:= true -> + S2 = refresh_main_window(S#state{hide_unknown = Bool}), + noreply(S2); + [_Text, _Group, Bool | _] when Bool =:= false -> + S2 = refresh_main_window(S#state{hide_unknown = Bool}), + noreply(S2); + _ -> + click_error(Click, S), + noreply(S) + end; + up -> + S2 = scroll_up(S), + noreply(S2); + down -> + S2 = scroll_down(S), + noreply(S2); + first -> + S2 = scroll_first(S), + noreply(S2); + prev -> + S2 = scroll_prev(S), + noreply(S2); + next -> + S2 = scroll_next(S), + noreply(S2); + last -> + S2 = scroll_last(S), + noreply(S2); + refresh -> + S2 = refresh_main_window(S), + noreply(S2); + {display_mode, Mode} -> + S2 = change_display_mode(Mode, S), + noreply(S2); + close_all -> + close_all(S); + close_all_others -> + close_all_others(S); + first_all -> + et_collector:multicast(CollectorPid, first), + noreply(S); + prev_all -> + et_collector:multicast(CollectorPid, prev), + noreply(S); + next_all -> + et_collector:multicast(CollectorPid, next), + noreply(S); + last_all -> + et_collector:multicast(CollectorPid, last), + noreply(S); + refresh_all -> + et_collector:multicast(CollectorPid, refresh), + noreply(S); + clear_all -> + et_collector:clear_table(CollectorPid), + et_collector:multicast(CollectorPid, refresh), + noreply(S); + load_all -> + et_collector:start_trace_client(CollectorPid, event_file, "et_viewer.log"), + noreply(S); + save_all -> + et_collector:save_event_file(CollectorPid, + "et_viewer.log", + [existing, write, keep]), + noreply(S); + {open_viewer, Scale} -> + Actors = [A#actor.name || A <- S#state.actors], + open_viewer(Scale, S#state.active_filter, Actors, S), + noreply(S); + _Level when Data =:= detail_level, is_integer(hd(Other)), + hd(Other) >= ?detail_level_min, + hd(Other) =< ?detail_level_max -> + S2 = S#state{detail_level = hd(Other)}, + noreply(S2); + _PopupMenuItem when is_record(Data, filter) -> + open_viewer(S#state.scale, Data#filter.name, [?unknown], S), + noreply(S); + _ -> + click_error(Click, S), + noreply(S) + end; +handle_info({gs, _Obj, destroy,_, _}, S) -> + gs:destroy(S#state.win), + {stop, shutdown, S}; +handle_info({gs, _Obj, buttonpress, _, [_Button, X, Y | _]}, S) -> + S3 = + case y_to_n(Y, S) of + actor -> + %% Actor click + case S#state.actors of + [] -> + S; + _ -> + N = x_to_n(X, S), + A = lists:nth(N, S#state.actors), + S#state{selected_actor = A} + end; + {event, N} -> + %% Event click + List = queue_to_list(S#state.events), + S2 = S#state{events = list_to_queue(List)}, + + Key = lists:nth(N, List), + Pid = S#state.collector_pid, + Fun = fun create_contents_window/2, + case et_collector:iterate(Pid, Key, -1) of + Prev when Prev =:= Key -> + et_collector:iterate(Pid, first, 1, Fun, S2); + Prev -> + et_collector:iterate(Pid, Prev, 1, Fun, S2) + end + end, + noreply(S3); +handle_info({gs, _Obj, buttonrelease, _, [_Button, X, Y | _]}, S) -> + S2 = + case y_to_n(Y, S) of + actor -> + %% Actor click + case S#state.actors of + [] -> + S; + Actors -> + N = x_to_n(X, S), + New = lists:nth(N, S#state.actors), + Old = S#state.selected_actor, + case New#actor.name =:= Old#actor.name of + true -> + A = S#state.selected_actor, + toggle_search_for_actor(A#actor.name, S); + false -> + move_actor(Old, New, Actors, S) + end + end; + {event, _N} -> + %% Event click ignored + S + end, + noreply(S2); +handle_info({gs, _Obj, keypress, _, [KeySym, _Keycode, _Shift, _Control | _]} = Key, S) -> + case KeySym of + 'c' -> + close_all_others(S); + 'C' -> + close_all(S); + 'Up' -> + S2 = scroll_up(S), + noreply(S2); + 'Down' -> + S2 = scroll_down(S), + noreply(S2); + 'f' -> + S2 = scroll_first(S), + noreply(S2); + 'p' -> + S2 = scroll_prev(S), + noreply(S2); + 'Prior' -> + S2 = scroll_prev(S), + noreply(S2); + 'n' -> + S2 = scroll_next(S), + noreply(S2); + 'Next' -> + S2 = scroll_next(S), + noreply(S2); + 'l' -> + S2 = scroll_last(S), + noreply(S2); + 'r' -> + S2 = refresh_main_window(S), + noreply(S2); + 'F' -> + et_collector:multicast(S#state.collector_pid, first), + noreply(S); + 'P' -> + et_collector:multicast(S#state.collector_pid, prev), + noreply(S); + 'N' -> + et_collector:multicast(S#state.collector_pid, next), + noreply(S); + 'L' -> + et_collector:multicast(S#state.collector_pid, last), + noreply(S); + 'R' -> + et_collector:multicast(S#state.collector_pid, refresh), + noreply(S); + + 'a' -> + S2 = S#state{display_mode = all}, + S3 = refresh_main_window(S2), + noreply(S3); + + 'equal' -> + Scale = S#state.scale, + Actors = [A#actor.name || A <- S#state.actors], + open_viewer(Scale, S#state.active_filter, Actors, S), + noreply(S); + 'plus' -> + Scale = S#state.scale + 1, + Actors = [A#actor.name || A <- S#state.actors], + open_viewer(Scale, S#state.active_filter, Actors, S), + noreply(S); + 'minus' -> + case S#state.scale of + 1 -> + gs:config(S#state.canvas, beep); + Scale -> + Actors = [A#actor.name || A <- S#state.actors], + open_viewer(Scale - 1, S#state.active_filter, Actors, S) + end, + noreply(S); + 0 -> + case lists:keysearch(?DEFAULT_FILTER_NAME, #filter.name, S#state.filters) of + {value, F} when is_record(F, filter) -> + open_viewer(S#state.scale, F#filter.name, [?unknown], S); + false -> + gs:config(S#state.canvas, beep) + end, + noreply(S); + Int when is_integer(Int), Int > 0, Int =< 9 -> + case catch lists:nth(Int, S#state.filters) of + F when is_record(F, filter) -> + open_viewer(S#state.scale, F#filter.name, [?unknown], S); + {'EXIT', _} -> + gs:config(S#state.canvas, beep) + end, + noreply(S); + + 'Shift_L' -> + noreply(S); + 'Shift_R' -> + noreply(S); + 'Caps_Lock' -> + noreply(S); + + _ -> + click_error(Key, S), + noreply(S) + end; +handle_info({gs, _Obj,configure, [], [W, H | _]}, S) -> + gs:config(S#state.packer, [{width, W}, {height, H}]), + S2 = S#state{width = W, height = H}, + noreply(S2); +handle_info(timeout, S) -> + Try = + case S#state.display_mode of + {search_actors, reverse, _, _} -> + -10; + _ -> + 10 + end, + if + S#state.is_suspended =:= true -> + {noreply, S, infinity}; + S#state.max_events =:= infinity -> + display_more_events(Try, S); + true -> + Needed = S#state.max_events - queue_length(S#state.events), + if + Needed =< 0 -> {noreply, S, infinity}; + Needed > 10 -> display_more_events(Try, S); + Needed =< 10 -> display_more_events(Needed, S) + end + end; + +handle_info({'EXIT', Pid, Reason}, S) -> + if + Pid =:= S#state.collector_pid -> + unlink(Pid), + gs:destroy(S#state.win), + {stop, Reason, S}; + Pid =:= S#state.parent_pid -> + unlink(Pid), + gs:destroy(S#state.win), + {stop, Reason, S}; + true -> + noreply(S) + end; +handle_info(Info, S) -> + ok = error_logger:format("~p(~p): handle_info(~p, ~p)~n", + [?MODULE, self(), Info, S]), + noreply(S). + +%%---------------------------------------------------------------------- +%% Func: terminate/2 +%% Purpose: Shutdown the server +%% Returns: any (ignored by gen_server) +%%---------------------------------------------------------------------- + +terminate(_Reason, _S) -> + ignore. + +%%---------------------------------------------------------------------- +%% Func: code_change/3 +%% Purpose: Convert process state when code is changed +%% Returns: {ok, NewState} +%%---------------------------------------------------------------------- + +code_change(_OldVsn, S, _Extra) -> + {ok, S}. + +%%%---------------------------------------------------------------------- +%%% Handle suspend/resume +%%%---------------------------------------------------------------------- + +reply(Reply, S) -> + case queue_length(S#state.events) of + _ when S#state.is_suspended =:= true -> + {reply, Reply, S, infinity}; + _ when S#state.max_events =:= infinity -> + {reply, Reply, S, 500}; + N when N >= S#state.max_events -> + {reply, Reply, S, infinity}; + _ -> + {reply, Reply, S, 0} + end. + +noreply(S) -> + case queue_length(S#state.events) of + _ when S#state.is_suspended =:= true -> + {noreply, S, infinity}; + _ when S#state.max_events =:= infinity -> + {noreply, S, 500}; + N when N >= S#state.max_events -> + {noreply, S, infinity}; + _ -> + {noreply, S, 0} + end. + +do_suspend(S) -> + config_suspend(S#state{is_suspended = true}). + +do_resume(S) -> + config_suspend(S#state{is_suspended = false}). + +config_suspend(S) -> + Suspended = S#state.is_suspended, + gs:config(refresh, [{enable, not Suspended}]), + gs:config(refresh_all, [{enable, not Suspended}]), + gs:config(clear_all, [{enable, not Suspended}]), + S. + +refresh_main_window(S) -> + Pid = S#state.collector_pid, + Key = S#state.first_event, + case et_collector:iterate(Pid, Key, -1) of + Prev when Prev =:= Key -> + scroll_first(S); + _Prev -> + S2 = S#state{last_event = S#state.first_event}, + clear_canvas(S2) + end. + +scroll_first(S) -> + S2 = S#state{first_event = first, last_event = first}, + clear_canvas(S2). + +scroll_prev(S) -> + Try = + case S#state.max_events of + infinity -> -10; + Max -> -Max + end, + Key = et_collector:iterate(S#state.collector_pid, S#state.first_event, Try), + S2 = S#state{first_event = Key, last_event = Key}, + clear_canvas(S2). + +scroll_next(S) -> + S2 = S#state{first_event = S#state.last_event}, + clear_canvas(S2). + +scroll_up(S) -> + Key = et_collector:iterate(S#state.collector_pid, S#state.first_event, -5), + S2 = S#state{first_event = Key, last_event = Key}, + clear_canvas(S2). + +scroll_down(S) -> + Key = et_collector:iterate(S#state.collector_pid, S#state.first_event, 5), + S2 = S#state{first_event = Key, last_event = Key}, + clear_canvas(S2). + +scroll_last(S) -> + S2 = S#state{first_event = last, last_event = last}, + clear_canvas(S2). + +change_display_mode(Mode, S) -> + case Mode of + all -> + S2 = S#state{display_mode = Mode}, + refresh_main_window(S2); + {search_actors, _Dir, _Key, []} -> + S2 = S#state{display_mode = all}, + refresh_main_window(S2); + {search_actors, _Dir, Key, Actors} when is_list(Actors) -> + Pid = S#state.collector_pid, + Prev = et_collector:iterate(Pid, Key, -1), + S2 = S#state{first_event = Prev, + last_event = Prev, + display_mode = Mode}, + clear_canvas(S2) + end. + +close_all(S) -> + et_collector:multicast(S#state.collector_pid, close), + timer:sleep(timer:seconds(1)), + spawn(et_collector, stop, [S#state.collector_pid]), + gs:destroy(S#state.win), + {stop, shutdown, S}. + +close_all_others(S) -> + Fun = + fun({{subscriber, Pid}, _}) -> + if + Pid =:= self() -> + ignore; + true -> + unlink(Pid), + Pid ! {et, close} + end + end, + All = et_collector:dict_match(S#state.collector_pid, + {{subscriber, '_'}, '_'}), + lists:foreach(Fun, All), + noreply(S). + +click_error(Click, S) -> + gs:config(S#state.canvas, beep), + io:format("~p: ignored: ~p~n", [?MODULE, Click]). + +%%%---------------------------------------------------------------------- +%%% Clone viewer +%%%---------------------------------------------------------------------- + +open_viewer(Scale, FilterName, Actors, S) -> + Filters = [{dict_insert, {filter, F#filter.name}, F#filter.function} + || F <- S#state.filters], + Options = + [{parent_pid, S#state.parent_pid}, + {title, S#state.title}, + {collector_pid, S#state.collector_pid}, + {is_suspended, S#state.is_suspended}, + {detail_level, S#state.detail_level}, + {active_filter, FilterName}, + {event_order, S#state.event_order}, + {first_event, S#state.first_event}, + {max_events, S#state.max_events}, + {max_actors, S#state.max_actors}, + {hide_actions, S#state.hide_actions}, + {hide_unknown, S#state.hide_unknown}, + {is_suspended, S#state.is_suspended}, + {actors, Actors}, + {scale, Scale}, + {width, S#state.width}, + {height, S#state.height} | Filters], + case start_link(Options) of + {ok, ViewerPid} -> + unlink(ViewerPid), + ok; + {error, Reason} -> + ok = error_logger:format("~p: Failed to start a new window: ~p~n", + [?MODULE, Reason]) + end. + +%%%---------------------------------------------------------------------- +%%% Handle graphics +%%%---------------------------------------------------------------------- + +create_main_window(S) -> + Font = select_font(S#state.scale), + GS = gs:start(), + Name = name_to_string(S#state.active_filter), + Title = case S#state.title of + undefined -> atom_to_list(?MODULE); + Explicit -> name_to_string(Explicit) + end, + WinOpt = [{title, Title ++ " (filter: " ++ Name ++ ")"}, + {configure, true}, + {width, S#state.width}, + {height, S#state.height}], + Win = gs:window(GS, WinOpt), + Bar = gs:menubar(Win, []), + + create_file_menu(Bar), + create_viewer_menu(Bar), + create_collector_menu(Bar), + gs:menubutton(filter_button, Bar, [{label, {text, "Filter"}}]), + create_filter_menu(S#state.active_filter, S#state.filters), + create_help_menu(Bar), + + config_suspend(S), + + PackerOpt = [{packer_x, [{fixed, 5}, {fixed, 40}, {fixed, 40}, + {stretch, 1}, {fixed, 5}]}, + {packer_y, [{fixed, 30}, {fixed, 30}, + {stretch, 1}, {fixed, 30}]}, + {x, 0}, {y, 30}], + Packer = gs:frame(Win, PackerOpt), + gs:checkbutton(suspended, Packer, [{label,{text,"Freeze"}}, + {x, 10}, {y, 0}, + {width, 120}, {align, w}, + {select, S#state.is_suspended}]), + gs:checkbutton(hide_actions, Packer, [{label,{text,"Hide From=To"}}, + {x, 10}, {y, 20}, + {width, 120}, {align, w}, + {select, S#state.hide_actions}]), + gs:checkbutton(hide_unknown, Packer, [{label,{text,"Hide Unknown"}}, + {x, 10}, {y, 40}, + {width, 120}, {align, w}, + {select, S#state.hide_unknown}]), + gs:scale(Packer, [{text,"Detail Level"}, + {range, {?detail_level_min, ?detail_level_max}}, + {orient, horizontal}, + {x, 150}, {y, 0}, {height, 65}, {width, 200}, + {pos, S#state.detail_level}, {data, detail_level}]), + CanvasW = calc_canvas_width(S), + CanvasH = calc_canvas_height(S), + CanOpt = [{pack_xy, {{2, 4}, 3}}, {vscroll, right}, {hscroll, bottom}, + {scrollregion, {2, 2, CanvasW, CanvasH}}], + Canvas = gs:canvas(Packer, CanOpt), + gs:config(Canvas, [{buttonpress, true}, {buttonrelease, true}]), + gs:config(Packer, [{width, S#state.width}, {height, S#state.height}]), + gs:config(Win, [{map, true}, {keypress, true}]), + S2 = S#state{title = Title, + win = Win, font = Font, packer = Packer, + canvas_width = CanvasW, canvas_height = CanvasH, + canvas = Canvas, + y_pos = ?initial_y * S#state.scale}, + draw_all_actors(S2). + +select_font(Scale) when is_integer(Scale) -> + case Scale of + 1 -> {courier, 7}; + 2 -> {courier, 10}; + 3 -> {courier, 12}; + 4 -> {courier, 14}; + S -> {courier, S * 4} + end. + +create_file_menu(Bar) -> + Button = gs:menubutton(Bar, [{label, {text, "File"}}]), + Menu = gs:menu(Button, []), + gs:menuitem(close_all, Menu, [{label, {text, "Close Collector and all Viewers (C) "}}]), + gs:menuitem(close_all_others, Menu, [{label, {text, "Close other Viewers, but keep Collector (c)"}}]), + gs:menuitem(close, Menu, [{label, {text, "Close this Viewer, but keep Collector"}}]), + gs:menuitem(Menu, [{itemtype, separator}]), + + gs:menuitem(clear_all, Menu, [{label, {text, "Clear Collector"}}]), + gs:menuitem(load_all, Menu, [{label, {text, "Load Collector from the file \"et_viewer.log\""}}]), + gs:menuitem(save_all, Menu, [{label, {text, "Save Collector to the file \"et_viewer.log\""}}]). + +create_viewer_menu(Bar) -> + Button = gs:menubutton(Bar, [{label, {text, "Viewer"}}]), + Menu = gs:menu(Button, []), + gs:menuitem(Menu, [{label, {text, "Scroll this Viewer"}}, {bg, lightblue}, {enable,false}]), + gs:menuitem(Menu, [{itemtype, separator}]), + gs:menuitem(first, Menu, [{label, {text, "First (f)"}}]), + gs:menuitem(prev, Menu, [{label, {text, "Prev (p)"}}]), + gs:menuitem(next, Menu, [{label, {text, "Next (n)"}}]), + gs:menuitem(last, Menu, [{label, {text, "Last (l)"}}]), + gs:menuitem(refresh, Menu, [{label, {text, "Refresh (r)"}}]), + gs:menuitem(Menu, [{itemtype, separator}]), + gs:menuitem(up, Menu, [{label, {text, "Up 5 (Up)"}}]), + gs:menuitem(down, Menu, [{label, {text, "Down 5 (Down)"}}]), + gs:menuitem(Menu, [{itemtype, separator}]), + gs:menuitem(Menu, [{label, {text, "Search in this Viewer"}}, {bg, lightblue}, {enable,false}]), + gs:menuitem(Menu, [{itemtype, separator}]), + gs:menuitem({mode, all}, Menu, [{label, {text, "Abort search. Display all (a)"}}]). + +create_collector_menu(Bar) -> + Button = gs:menubutton(Bar, [{label, {text, "Collector"}}]), + Menu = gs:menu(Button, []), + gs:menuitem(Menu, [{label, {text, "Scroll all Viewers"}}, {bg, lightblue}, {enable,false}]), + gs:menuitem(Menu, [{itemtype, separator}]), + gs:menuitem(first_all, Menu, [{label, {text, "First (F)"}}]), + gs:menuitem(prev_all, Menu, [{label, {text, "Prev (P)"}}]), + gs:menuitem(next_all, Menu, [{label, {text, "Next (N)"}}]), + gs:menuitem(last_all, Menu, [{label, {text, "Last (L)"}}]), + gs:menuitem(refresh_all, Menu, [{label, {text, "Refresh (R)"}}]). + +create_filter_menu(ActiveFilterName, Filters) -> + Menu = gs:menu(filter_menu, filter_button, []), + Item = fun(F, N) when F#filter.name =:= collector -> + Label = lists:concat([pad_string(F#filter.name, 20), "(0)"]), + gs:menuitem(Menu, [{label, {text, Label}}, {data, F}]), + N + 1; + (F, N) -> + Label = lists:concat([pad_string(F#filter.name, 20), "(", N, ")"]), + gs:menuitem(Menu, [{label, {text, Label}}, {data, F}]), + N + 1 + end, + gs:menuitem(Menu, [{label, {text, "Same Filter New Scale"}}, {bg, lightblue}, {enable,false}]), + gs:menuitem(Menu, [{itemtype, separator}]), + {value, Filter} = lists:keysearch(ActiveFilterName, #filter.name, Filters), + Same = lists:concat([pad_string(ActiveFilterName, 20), "(=)"]), + Larger = lists:concat([pad_string(ActiveFilterName, 20), "(+)"]), + Smaller = lists:concat([pad_string(ActiveFilterName, 20), "(-)"]), + gs:menuitem(Menu, [{label, {text, Same}}, {data, Filter}]), + gs:menuitem(Menu, [{label, {text, Smaller}}, {data, Filter}]), + gs:menuitem(Menu, [{label, {text, Larger}}, {data, Filter}]), + gs:menuitem(Menu, [{itemtype, separator}]), + gs:menuitem(Menu, [{label, {text, "New Filter Same Scale"}}, {bg, lightblue}, {enable,false}]), + gs:menuitem(Menu, [{itemtype, separator}]), + lists:foldl(Item, 1, Filters). + +create_help_menu(Bar) -> + Button = gs:menubutton(Bar, [{label, {text, "Help"}}]), + Menu = gs:menu(Button, []), + gs:menuitem(Menu, [{label, {text, "Display details of an event"}}, + {bg, lightblue}, {enable,false}]), + gs:menuitem(Menu, [{label, {text, " Single click on the name tag or the arrow (Mouse-1)"}}, + {enable,false}]), + gs:menuitem(Menu, [{itemtype, separator}]), + gs:menuitem(Menu, [{label, {text, "Toggle actor search"}}, + {bg, lightblue}, {enable,false}]), + gs:menuitem(Menu, [{label, {text, " Single click on the name tag (Mouse-1)"}}, + {enable,false}]), + gs:menuitem(Menu, [{itemtype, separator}]), + gs:menuitem(Menu, [{label, {text, "Move actor"}}, + {bg, lightblue}, {enable,false}]), + gs:menuitem(Menu, [{label, {text, " se drag and drop on name tag (Mouse-1)"}}, + {enable,false}]). + +clear_canvas(S) -> + gs:destroy(S#state.canvas), + CanvasW = calc_canvas_width(S), + CanvasH = calc_canvas_height(S), + CanOpt = [{pack_xy, {{2, 4}, 3}}, {vscroll, right}, {hscroll, bottom}, + {scrollregion, {2, 2, CanvasW, CanvasH}}], + Canvas = gs:canvas(S#state.packer, CanOpt), + gs:config(S#state.packer, [{width, S#state.width}, {height, S#state.height}]), + gs:config(Canvas, [{buttonpress, true}, {buttonrelease, true}]), + S2 = S#state{refresh_needed = false, + y_pos = ?initial_y * S#state.scale, + canvas = Canvas, + canvas_width = CanvasW, + canvas_height = CanvasH, + events = queue_new()}, + draw_all_actors(S2). + +calc_canvas_width(S) -> + Min = calc_min_actors(S), + CanvasW = ((2 * ?initial_x) + (Min * ?incr_x)) * S#state.scale, + lists:max([CanvasW, S#state.width - (15 * S#state.scale), S#state.canvas_width]). + +calc_canvas_height(S) -> + Min = calc_min_events(S), + CanvasH = ((2 * ?initial_y) + (Min * ?incr_y)) * S#state.scale, + lists:max([CanvasH, S#state.height - (4 * 30), S#state.canvas_height]). + +calc_min_actors(S) -> + Max = S#state.max_actors, + N = length(S#state.actors), + if + Max =:= infinity -> + N * 2; + Max < N -> + N; + true -> + Max + end. + +calc_min_events(S) -> + Max = S#state.max_events, + N = queue_length(S#state.events), + if + Max =:= infinity -> + N * 2; + Max < N -> + N; + true -> + Max + end. + +display_more_events(Try, S) -> + Name = S#state.active_filter, + {value, F} = lists:keysearch(Name, #filter.name, S#state.filters), + FilterFun = F#filter.function, + Fun = fun(Event, State) -> + case catch FilterFun(Event) of + true -> + State2 = ensure_key(Event, State), + opt_display_event(Event, State2); + {true, Event2} -> + State2 = ensure_key(Event2, State), + opt_display_event(Event2, State2); + false -> + ensure_key(Event, State); + Bad -> + Contents = {bad_filter, Name, Bad, Event}, + Event2 = Event#event{contents = Contents, + from = bad_filter, + to = bad_filter}, + State2 = ensure_key(Event2, State), + opt_display_event(Event2, State2) + end + end, + Pid = S#state.collector_pid, + S2 = et_collector:iterate(Pid, S#state.last_event, Try, Fun, S), + case queue_length(S2#state.events) - queue_length(S#state.events) of + Diff when Diff =:= Try -> + %% Got as much as requested, look for more + %% io:format("Done: ~p~n", [{Try, Diff}]), + {noreply, S2, 0}; + _Diff when S2#state.first_event =:= S#state.first_event, + S2#state.last_event =:= S#state.last_event -> + %% Got lesser than requested, wait a while before looking for more + %% io:format("More: ~p~n", [{Try, Diff}]), + {noreply, S2, 500}; + _Diff -> + %% Got lesser than requested, look for more + %% io:format("More2: ~p~n", [{Try, Diff}]), + {noreply, S2, 0} + end. + +ensure_key(E, S) when is_record(E, event), is_record(S, state) -> + Key = et_collector:make_key(S#state.event_order, E), + case S#state.first_event of + first -> + S#state{first_event = Key, last_event = Key}; + last -> + S#state{first_event = Key, last_event = Key}; + _ -> + S#state{last_event = Key} + end. + +opt_display_event(E, S) -> + case S#state.display_mode of + all -> + display_event(E, S); + {search_actors, _Dir, _FirstKey, Actors} -> + %% Key = S#state.last_event, + From = select_actor_name(E#event.from, S), + case lists:member(From, Actors) of + true -> + display_event(E, S); + false -> + To = select_actor_name(E#event.to, S), + case lists:member(To, Actors) of + true -> + display_event(E, S); + false -> + S + end + end + end. + +select_actor_name(Name, S) -> + case lists:keymember(Name, #actor.name, S#state.actors) of + true -> Name; + false -> ?unknown + end. + +display_event(E, S) when E#event.detail_level < S#state.detail_level -> + {FromRefresh, From} = ensure_actor(E#event.from, S), + {FromName, FromPos, S2} = From, + {ToRefresh, To} = ensure_actor(E#event.to, S2), + {ToName, ToPos, S3} = To, + if + FromRefresh =/= false, ToRefresh =/= false -> + Key = S#state.last_event, + refresh_beep(S), + S3#state{refresh_needed = true, + events = queue_in(Key, S3#state.events)}; + FromName =:= ToName -> + case S#state.hide_actions of + true -> + S3; + false -> + Label = name_to_string(E#event.label), + draw_named_arrow(Label, FromName, FromPos, ToName, ToPos, S3) + end; + true -> + Label = name_to_string(E#event.label), + draw_named_arrow(Label, FromName, FromPos, ToName, ToPos, S3) + end; +display_event(_, S) -> + S. + +draw_named_arrow(Label, FromName, FromPos, ToName, ToPos, S) -> + Key = S#state.last_event, + case S#state.y_pos + (?incr_y * S#state.scale) of + _ when S#state.hide_unknown =:= true, FromName =:= ?unknown -> + S; + _ when S#state.hide_unknown =:= true, ToName =:= ?unknown -> + S; + Y when Y > S#state.canvas_height -> + refresh_beep(S), + S#state{refresh_needed = true, + events = queue_in(Key, S#state.events)}; + Y -> + S2 = S#state{y_pos = Y, events = queue_in(Key, S#state.events)}, + S3 = draw_arrow(FromPos, ToPos, S2), + draw_label(Label, FromName, ToName, FromPos, ToPos, S3) + end. + +refresh_beep(S) -> + case S#state.refresh_needed of + false -> + gs:config(S#state.canvas, beep), + gs:config(S#state.canvas, beep), + gs:config(S#state.canvas, beep); + true -> + ignore + end. + +draw_arrow(Pos, Pos, S) -> + S; +draw_arrow(FromPos, ToPos, S) -> + Y = S#state.y_pos, + CanOpts = [{coords, [{FromPos , Y}, {ToPos, Y}]}, + {arrow, last},{width, 1}, {fg, black}], + gs:line(S#state.canvas, CanOpts), + S. + +draw_label(Label, FromName, ToName, FromPos, ToPos, S) -> + Colour = + if + FromName =:= ?unknown, + ToName =:= ?unknown -> blue; %turquoise; + FromName =:= ?unknown -> orange; + ToName =:= ?unknown -> orange; + FromPos =:= ToPos -> blue; + true -> red + end, + Scale = S#state.scale, + X = lists:min([FromPos, ToPos]) + (6 * Scale), + Y = S#state.y_pos, + write_text(Label, X, Y, Colour, S), + S. + +draw_all_actors(State) -> + Scale = State#state.scale, + Fun = fun(A, X) -> + draw_actor(A, X, State), + X + (?incr_x * Scale) + end, + lists:foldl(Fun, ?initial_x * Scale, State#state.actors), + State. + +%% Returns: {NeedsRefreshBool, {ActorPos, NewsS, NewActors}} +ensure_actor(Name, S) -> + do_ensure_actor(Name, S, S#state.actors, 0). + +do_ensure_actor(Name, S, [H | _], N) when H#actor.name =:= Name -> + Pos = (?initial_x + (N * ?incr_x)) * S#state.scale, + {false, {Name, Pos, S}}; +do_ensure_actor(Name, S, [_ | T], N) -> + do_ensure_actor(Name, S, T, N + 1); +do_ensure_actor(Name, S, [], N) -> + %% A brand new actor, let's see if it does fit + Pos = (?initial_x + (N * ?incr_x)) * S#state.scale, + MaxActors = S#state.max_actors, + if + is_integer(MaxActors), N > MaxActors -> + %% Failed on max_actors limit, put into unknown + %% Assume that unknown always is in actor list + ensure_actor(?unknown, S); + Pos > (S#state.canvas_width - ((?initial_x - 15) * S#state.scale)) -> + %% New actor does not fit in canvas, refresh needed + A = create_actor(Name), + draw_actor(A, Pos, S), + {true, {Name, Pos, S#state{actors = S#state.actors ++ [A]}}}; + true -> + %% New actor fits in canvas. Draw the new actor. + A = create_actor(Name), + draw_actor(A, Pos, S), + {false, {Name, Pos, S#state{actors = S#state.actors ++ [A]}}} + end. + +draw_actor(A, LineX, S) -> + Scale = S#state.scale, + TextX = LineX - (5 * Scale), + TextY = ?initial_y * Scale, + LineTopY = TextY + ((?incr_y / 2) * Scale), + LineBotY = S#state.canvas_height - ((?incr_y / 2) * Scale), + Colour = case A#actor.name of + ?unknown -> orange; + _ -> red + end, + write_text(A#actor.string, TextX, TextY, Colour, S), + LineOpt = [{coords, [{LineX, LineTopY}, {LineX, LineBotY}]}, + {width, 1}, {fg, Colour}], + gs:line(S#state.canvas, LineOpt). + +toggle_search_for_actor(ActorName,S) -> + case S#state.display_mode of + all -> + io:format("~p: search for: ~p ++ ~p~n", [?MODULE, [], [ActorName]]), + %% Search for this actor + Key = S#state.first_event, + Actors = [ActorName], + Mode = {search_actors, forward, Key, Actors}, + change_display_mode(Mode, S); + {search_actors, Dir, Key, Actors}-> + Actors2 = + case lists:member(ActorName, Actors) of + true -> + io:format("~p: search for: ~p -- ~p~n", [?MODULE, Actors, [ActorName]]), + %% Remove actor from search list + Actors -- [ActorName]; + false -> + io:format("~p: search for: ~p ++ ~p~n", [?MODULE, Actors, [ActorName]]), + %% Add actor from search list + [ActorName | Actors] + end, + Mode2 = {search_actors, Dir, Key, Actors2}, + change_display_mode(Mode2, S) + end. + +move_actor(From, To, Actors, S) -> + Pos = #actor.name, + ToName = To#actor.name, + FromName = From#actor.name, + ToIx = actor_index(ToName, Pos, Actors), + FromIx = actor_index(FromName, Pos, Actors), + if + FromIx =/= 0, ToIx =/= 0, ToIx > FromIx -> + Actors2 = lists:keydelete(FromName, Pos, Actors), + Actors3 = insert_actor_after(From, To, Actors2), + S2 = S#state{actors = Actors3}, + refresh_main_window(S2); + FromIx =/= 0, ToIx =/= 0 -> + Actors2 = lists:keydelete(FromName, Pos, Actors), + Actors3 = insert_actor_before(From, To, Actors2), + S2 = S#state{actors = Actors3}, + refresh_main_window(S2); + true -> + %% Ignore + S + end. + +insert_actor_after(From, To, [H | T]) -> + case To#actor.name =:= H#actor.name of + true -> [H, From | T]; + false -> [H | insert_actor_after(From, To, T)] + end; +insert_actor_after(_From, _To, []) -> + []. + +insert_actor_before(From, To, [H | T]) -> + case To#actor.name =:= H#actor.name of + true -> [From, H | T]; + false -> [H | insert_actor_before(From, To, T)] + end; +insert_actor_before(_From, _To, []) -> + []. + +actor_index(_Key, _Pos, []) -> + 0; +actor_index(Key, Pos, [H | T]) -> + case Key =:= element(Pos, H) of + false -> actor_index(Key, Pos, T) + 1; + true -> 1 + end. + +y_to_n(Y, S) -> + Y2 = ((Y / S#state.scale) - ?initial_y + (?incr_y / 2)), + N = round(Y2 / ?incr_y - 0.2), + MaxN = queue_length(S#state.events), + if + N =< 0 -> actor; + N > MaxN -> actor; + true -> {event, N} + end. + +x_to_n(X, S) -> + Scale = S#state.scale, + Len = length(S#state.actors), + X2 = X - (?initial_x * Scale), + N = X2 / (?incr_x * Scale), + N2 = trunc(N + 1.5), + if + N2 > Len -> Len; + N2 < 1 -> 1; + true -> N2 + end. + +write_text(Text, X, Y, Colour, S) -> + Opt = [{coords, [{X, Y - (?incr_y * S#state.scale / 2)}]}, + {font, S#state.font}, {fg, Colour}, {text, Text}], + gs:text(S#state.canvas, Opt). + +create_contents_window(Event, S) -> + Options = [{viewer_pid, self()}, + {event, Event}, + {event_order, S#state.event_order}, + {active_filter, S#state.active_filter} + | S#state.filters], + case et_gs_contents_viewer:start_link(Options) of + {ok, _Pid} -> + S; + {error, Reason} -> + ok = error_logger:format("~p(~p): create_contents_window(~p) ->~n ~p~n", + [?MODULE, self(), Options, Reason]), + S + end. + +%%%---------------------------------------------------------------------- +%%% String padding of actors +%%%---------------------------------------------------------------------- + +create_actor(Name) -> + String = name_to_string(Name), + PaddedString = pad_string(String, 8), + #actor{name = Name, string = PaddedString}. + +name_to_string(Name) -> + case catch io_lib:format("~s", [Name]) of + {'EXIT', _} -> lists:flatten(io_lib:format("~w", [Name])); + GoodString -> lists:flatten(GoodString) + end. + +pad_string(Atom, MinLen) when is_atom(Atom) -> + pad_string(atom_to_list(Atom), MinLen); +pad_string(String, MinLen) when is_integer(MinLen), MinLen >= 0 -> + Len = length(String), + case Len >= MinLen of + true -> + String; + false -> + String ++ lists:duplicate(MinLen - Len, $ ) + end. + +%%%---------------------------------------------------------------------- +%%% Queue management +%%%---------------------------------------------------------------------- + +queue_new() -> + {0, [], []}. + +queue_in(X, {Size, In, Out}) -> + {Size + 1, [X | In], Out}. + +%% queue_out(Q) -> +%% case Q of +%% {Size, In, [H | Out]} -> {{value, H}, {Size - 1, In, Out}}; +%% {Size, [], []} -> {empty, {Size, [], []}}; +%% {Size, In, _} -> queue_out({Size, [], lists:reverse(In)}) +%% end. + +queue_to_list({_Size, [], Out}) -> + Out; +queue_to_list({_Size, In, Out}) -> + Out ++ lists:reverse(In). + +queue_length({Size, _In, _Out}) -> + Size. + +list_to_queue(List) when is_list(List) -> + {length(List), [], List}. |