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2000-10-13 Mathieu Lacage <mathieu@eazel.com> * docs/state-machines.txt: new design for the state machine taking into account the new async states. * libnautilus-extensions/nautilus-bonobo-extensions.c: (nautilus_bonobo_set_icon), (oaf_activation_callback), (nautilus_bonobo_activate_from_id), (nautilus_bonobo_activate_stop), (nautilus_bonobo_activate_free): add async activation call. * libnautilus-extensions/nautilus-bonobo-extensions.h: add prototypes. * src/nautilus-view-frame.c: (nautilus_view_frame_initialize_class), (view_frame_activating), (view_frame_not_activated), (view_frame_activated), (view_frame_stop_activation), (view_frame_wait), (view_frame_underway), (view_frame_wait_is_over), (view_frame_loaded), (view_frame_failed), (nautilus_view_frame_set_to_component), (activation_callback), (nautilus_view_frame_load_client_async), (nautilus_view_frame_load_client), (nautilus_view_frame_stop_activation), (nautilus_view_frame_load_location): implement new state machine. add comments to explain by which stimulus the state-chaging functions are triggered. * src/nautilus-view-frame.h: add prototype for new async activation function of ViewFrames.
78 lines
4.3 KiB
Plaintext
78 lines
4.3 KiB
Plaintext
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Proposal for the loading state machines
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ViewFrame state machine
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States are:
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E: Empty (the initial state right after construction)
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A: Activating (waiting for component to be activated)
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N: No load_location request (a view component has been loaded, but no load_location request has been sent yet)
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W: Waiting (waiting for a response after a load request)
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U: Underway (the component has responded and the load is assumed underway)
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L: Loaded (the component has finished loading successfully)
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F: Failed (there was a fatal error somewhere)
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X: this stimulus is guaranteed impossible in this state
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Things I was unsure about:
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?2: Once a load has failed at some stage, should it be OK for Nautilus
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to try to make further calls of any kind?
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Missing:
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1) "Component stops responding" stimulus.
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2) Distinction of failure loading vs. crash of the component.
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Note:
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A "*" means that this is illegal but non-fatal, so we want to use g_warning.
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State Transition Chart
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Initial State
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| E | A | N | W | U | L | F |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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successful load_client call | A | X | X | X | X | X | ?2 |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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unsuccessful load_client call | F | X | X | X | X | X | ?2 |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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successful activated_component call | X | N | X | X | X | X | ?2 |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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unsuccessful activated_component call | X | F | X | X | X | X | ?2 |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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stop activation | E | E | X | X | X | X | ?2 |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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nautilus_view_frame_load_location call | X | F | W | W | W | W | ?2 |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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open_location call from component | X | X | N* | U | U | L | X |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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open_location_in_new_window | X | X | N* | U | U | L | X |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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report_location_change | X | X | N* | U | U | U | X |
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S ----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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t report_selection_change | X | X | N* | U | U | L | X |
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i ----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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m report_status | X | X | N* | U | U | L | X |
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u ----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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l report_load_underway | X | X | N* | U | U | U | X |
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u ----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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s report_load_progress | X | X | N* | U | U | U | X |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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report_load_complete | X | X | N* | L | L | L | X |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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report_load_failed | X | X | N* | F | F | F | X |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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set_title | X | X | N* | U | U | L | X |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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user hits cancel on timer dialog | X | X | X | F | X | X | X |
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----------------------------------------|-----|-----|-----|-----|-----|-----|-----|
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