%%
%% %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).
%%%----------------------------------------------------------------------
%%% 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}.
