Stories paused state, and state machine.

[gmajoulet]

• New story paused state
• State machine to implement NOT_ACTIVE, ACTIVE, and PAUSED states
• cf internal design doc

Usage:

this.storeService_.dispatch(Action.TOGGLE_PAUSED, boolean);

The paused state is not used right now, but I'll work on a PR to fix #15430. Do we want this issue to be fixed in 0.1 too?

[newmuis]

The paused state is not used right now, but I'll work on a PR to fix #15430.

Apart from fixing #15430, are you also going to add a user gesture to set the PageState?

Do we want this issue to be fixed in 0.1 too?

No 😃 Only P0 fixes in 0.1 from now on.

[gmajoulet]

Apart from fixing #15430, are you also going to add a user gesture to set the PageState?

Yup that would be really cool. Getting the right numbers to make sure we detect correctly if the gesture is a click, swipe, or long press, might require a bit of time / user testing though, but we should be able to get a prototype to play with in a couple hours.