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import {get, set} from "./schedule.js";
function tweenRemove(id, name) {
var tween0, tween1;
return function() {
var schedule = set(this, id),
tween = schedule.tween;
// If this node shared tween with the previous node,
// just assign the updated shared tween and we’re done!
// Otherwise, copy-on-write.
if (tween !== tween0) {
tween1 = tween0 = tween;
for (var i = 0, n = tween1.length; i < n; ++i) {
if (tween1[i].name === name) {
tween1 = tween1.slice();
tween1.splice(i, 1);
break;
}
}
}
schedule.tween = tween1;
};
}
function tweenFunction(id, name, value) {
var tween0, tween1;
if (typeof value !== "function") throw new Error;
return function() {
var schedule = set(this, id),
tween = schedule.tween;
// If this node shared tween with the previous node,
// just assign the updated shared tween and we’re done!
// Otherwise, copy-on-write.
if (tween !== tween0) {
tween1 = (tween0 = tween).slice();
for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
if (tween1[i].name === name) {
tween1[i] = t;
break;
}
}
if (i === n) tween1.push(t);
}
schedule.tween = tween1;
};
}
export default function(name, value) {
var id = this._id;
name += "";
if (arguments.length < 2) {
var tween = get(this.node(), id).tween;
for (var i = 0, n = tween.length, t; i < n; ++i) {
if ((t = tween[i]).name === name) {
return t.value;
}
}
return null;
}
return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
}
export function tweenValue(transition, name, value) {
var id = transition._id;
transition.each(function() {
var schedule = set(this, id);
(schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
});
return function(node) {
return get(node, id).value[name];
};
}