91 lines
2.9 KiB
JavaScript
91 lines
2.9 KiB
JavaScript
// JQuery event driver
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var Patch = require("./patch.js");
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var DemandMatcher = require('./demand-matcher.js').DemandMatcher;
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var Struct = require('./struct.js');
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var Dataspace_ = require("./dataspace.js");
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var Dataspace = Dataspace_.Dataspace;
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var __ = Dataspace_.__;
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var _$ = Dataspace_._$;
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var jQueryEvent = Struct.makeConstructor('jQueryEvent', ['selector', 'eventName', 'eventValue']);
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function spawnJQueryDriver(baseSelector, metaLevel, wrapFunction) {
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metaLevel = metaLevel || 0;
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wrapFunction = wrapFunction || jQueryEvent;
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Dataspace.spawn(
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new DemandMatcher([Patch.observe(wrapFunction(_$('selector'), _$('eventName'), __))],
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[Patch.advertise(wrapFunction(_$('selector'), _$('eventName'), __))],
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{
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metaLevel: metaLevel,
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onDemandIncrease: function (c) {
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Dataspace.spawn(new JQueryEventRouter(baseSelector,
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c.selector,
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c.eventName,
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metaLevel,
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wrapFunction));
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}
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}));
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}
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function JQueryEventRouter(baseSelector, selector, eventName, metaLevel, wrapFunction) {
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var self = this;
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this.baseSelector = baseSelector || null;
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this.selector = selector;
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this.eventName = eventName;
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this.metaLevel = metaLevel || 0;
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this.wrapFunction = wrapFunction || jQueryEvent;
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this.preventDefault = (this.eventName.charAt(0) !== "+");
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this.handler =
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Dataspace.wrap(function (e) {
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Dataspace.send(self.wrapFunction(self.selector, self.eventName, e), self.metaLevel);
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if (self.preventDefault) e.preventDefault();
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return !self.preventDefault;
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});
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this.computeNodes().on(this.preventDefault ? this.eventName : this.eventName.substring(1),
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this.handler);
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}
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JQueryEventRouter.prototype.boot = function () {
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return Patch.pub(this.wrapFunction(this.selector, this.eventName, __), this.metaLevel)
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.andThen(Patch.sub(Patch.observe(this.wrapFunction(this.selector, this.eventName, __)),
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this.metaLevel));
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};
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JQueryEventRouter.prototype.handleEvent = function (e) {
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if (e.type === "stateChange" && e.patch.hasRemoved()) {
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this.computeNodes().off(this.eventName, this.handler);
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Dataspace.exit();
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}
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};
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JQueryEventRouter.prototype.computeNodes = function () {
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if (this.baseSelector) {
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return $(this.baseSelector).children(this.selector).addBack(this.selector);
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} else {
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return $(this.selector);
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}
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};
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function simplifyDOMEvent(e) {
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var keys = [];
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for (var k in e) {
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var v = e[k];
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if (typeof v === 'object') continue;
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if (typeof v === 'function') continue;
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keys.push(k);
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}
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keys.sort();
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var simplified = [];
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for (var i = 0; i < keys.length; i++) {
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simplified.push([keys[i], e[keys[i]]]);
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}
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return simplified;
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}
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///////////////////////////////////////////////////////////////////////////
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module.exports.spawnJQueryDriver = spawnJQueryDriver;
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module.exports.simplifyDOMEvent = simplifyDOMEvent;
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module.exports.jQueryEvent = jQueryEvent;
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