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slider.js
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slider.js
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"use strict";
var _xstate = require("xstate");
const {
actions,
createMachine,
assign
} = _xstate;
const {
choose
} = actions;
const fetchMachine = createMachine({
id: "slider",
initial: "idle",
context: {
"hasIndex": false
},
entry: ["coarseValue"],
activities: ["trackFormControlState", "trackThumbsSize"],
on: {
SET_VALUE: [{
cond: "hasIndex",
actions: "setValueAtIndex"
}, {
actions: "setValue"
}],
INCREMENT: {
actions: "incrementThumbAtIndex"
},
DECREMENT: {
actions: "decrementThumbAtIndex"
}
},
on: {
UPDATE_CONTEXT: {
actions: "updateContext"
}
},
states: {
idle: {
on: {
POINTER_DOWN: {
target: "dragging",
actions: ["setClosestThumbIndex", "setPointerValue", "focusActiveThumb"]
},
FOCUS: {
target: "focus",
actions: "setFocusedIndex"
},
THUMB_POINTER_DOWN: {
target: "dragging",
actions: ["setFocusedIndex", "focusActiveThumb"]
}
}
},
focus: {
entry: "focusActiveThumb",
on: {
POINTER_DOWN: {
target: "dragging",
actions: ["setClosestThumbIndex", "setPointerValue", "focusActiveThumb"]
},
THUMB_POINTER_DOWN: {
target: "dragging",
actions: ["setFocusedIndex", "focusActiveThumb"]
},
ARROW_DEC: {
actions: ["decrementThumbAtIndex", "invokeOnChangeEnd"]
},
ARROW_INC: {
actions: ["incrementThumbAtIndex", "invokeOnChangeEnd"]
},
HOME: {
actions: ["setFocusedThumbToMin", "invokeOnChangeEnd"]
},
END: {
actions: ["setFocusedThumbToMax", "invokeOnChangeEnd"]
},
BLUR: {
target: "idle",
actions: "clearFocusedIndex"
}
}
},
dragging: {
entry: "focusActiveThumb",
activities: "trackPointerMove",
on: {
POINTER_UP: {
target: "focus",
actions: "invokeOnChangeEnd"
},
POINTER_MOVE: {
actions: "setPointerValue"
}
}
}
}
}, {
actions: {
updateContext: assign((context, event) => {
return {
[event.contextKey]: true
};
})
},
guards: {
"hasIndex": ctx => ctx["hasIndex"]
}
});