57 lines
1.6 KiB
JavaScript
57 lines
1.6 KiB
JavaScript
var Minimart = require("./minimart.js");
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var Route = Minimart.Route;
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var World = Minimart.World;
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var sub = Minimart.sub;
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var pub = Minimart.pub;
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var __ = Minimart.__;
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var _$ = Minimart._$;
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function spawnRoutingTableWidget(selector, fragmentClass, observationLevel) {
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observationLevel = observationLevel || 10;
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// ^ arbitrary: should be Infinity, when route.js supports it. TODO
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World.spawn({
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boot: function () { this.updateState(); },
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state: Route.emptyGestalt.serialize(),
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nextState: Route.emptyGestalt.serialize(),
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timer: false,
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localGestalt: (sub( ["DOM", selector, fragmentClass, __], 0, 2)
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.union(pub(["DOM", selector, fragmentClass, __], 0, 2))
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.telescoped()),
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digestGestalt: function (g) {
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return g.stripLabel().erasePath(this.localGestalt).serialize();
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},
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updateState: function () {
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var elts = ["pre", Route.deserializeGestalt(this.state).pretty()];
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World.updateRoutes([sub(__, 0, observationLevel),
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pub(__, 0, observationLevel),
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pub(["DOM", selector, fragmentClass, elts])]);
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},
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handleEvent: function (e) {
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var self = this;
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if (e.type === "routes") {
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self.nextState = self.digestGestalt(e.gestalt);
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if (self.timer) {
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clearTimeout(self.timer);
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self.timer = false;
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}
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self.timer = setTimeout(World.wrap(function () {
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if (JSON.stringify(self.nextState) !== JSON.stringify(self.state)) {
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self.state = self.nextState;
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self.updateState();
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}
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self.timer = false;
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}), 50);
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}
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}
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});
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}
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module.exports.spawnRoutingTableWidget = spawnRoutingTableWidget;
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