! Copyright (C) 2006, 2008 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
USING: kernel concurrency.messaging inspector ui.tools.listener
ui.tools.traceback ui.gadgets.buttons ui.gadgets.status-bar
ui.gadgets.tracks ui.commands ui.gadgets models
ui.tools.workspace ui.gestures ui.gadgets.labels ui threads
namespaces tools.walker assocs ;
IN: ui.tools.walker

TUPLE: walker-gadget status continuation thread ;

: walker-command ( walker msg -- )
    over walker-gadget-thread thread-registered?
    [ swap walker-gadget-thread send-synchronous drop ]
    [ 2drop ] if ;

: com-step ( walker -- ) step walker-command ;

: com-into ( walker -- ) step-into walker-command ;

: com-out ( walker -- ) step-out walker-command ;

: com-back ( walker -- ) step-back walker-command ;

: com-continue ( walker -- ) step-all walker-command ;

: com-abandon ( walker -- ) abandon walker-command ;

: com-inspect ( walker -- )
    walker-continuation model-value
    [ inspect ] curry call-listener ;

M: walker-gadget ungraft*
    dup delegate ungraft* detach walker-command ;

: walker-state-string ( status thread -- string )
    [
        "Thread: " %
        dup thread-name %
        " (" %
        swap {
            { +stopped+ "Stopped" }
            { +suspended+ "Suspended" }
            { +running+ "Running" }
            { +detached+ "Detached" }
        } at %
        ")" %
        drop
    ] "" make ;

: <thread-status> ( model thread -- gadget )
    [ walker-state-string ] curry <filter> <label-control> ;

: <walker-gadget> ( status continuation thread -- gadget )
    walker-gadget construct-boa [
        toolbar,
        g walker-gadget-status self <thread-status> f track,
        g walker-gadget-continuation <traceback-gadget> 1 track,
    ] { 0 1 } build-track ;

: walker-help "ui-walker" help-window ;

\ walker-help H{ { +nullary+ t } } define-command

walker-gadget "toolbar" f {
    { T{ key-down f f "s" } com-step }
    { T{ key-down f f "i" } com-into }
    { T{ key-down f f "o" } com-out }
    { T{ key-down f f "b" } com-back }
    { T{ key-down f f "c" } com-continue }
    { T{ key-down f f "a" } com-abandon }
    { T{ key-down f f "F1" } walker-help }
} define-command-map

walker-gadget "other" f {
    { T{ key-down f f "n" } com-inspect }
    { T{ key-down f f "d" } close-window }
} define-command-map

: walker-window ( -- )
    f <model> f <model> 2dup start-walker-thread
    [ <walker-gadget> ] keep thread-name open-status-window ;

[ [ walker-window ] with-ui ] new-walker-hook set-global

[
    [
        >r dup walker-gadget?
        [ walker-gadget-thread r> eq? ]
        [ r> 2drop f ] if
    ] curry find-window raise-window
] show-walker-hook set-global