121 lines
3.6 KiB
JavaScript
121 lines
3.6 KiB
JavaScript
// DOM fragment display driver
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var Syndicate = require("./syndicate.js");
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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 Network = Syndicate.Network;
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var __ = Syndicate.__;
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var _$ = Syndicate._$;
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function spawnDOMDriver(domWrapFunction, jQueryWrapFunction) {
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domWrapFunction = domWrapFunction || defaultWrapFunction;
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var spec = domWrapFunction(_$('selector'), _$('fragmentClass'), _$('fragmentSpec'));
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Network.spawn(
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new DemandMatcher(spec,
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Patch.advertise(spec),
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{
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onDemandIncrease: function (c) {
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Network.spawn(new DOMFragment(c.selector,
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c.fragmentClass,
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c.fragmentSpec,
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domWrapFunction,
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jQueryWrapFunction));
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}
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}));
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}
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function defaultWrapFunction(selector, fragmentClass, fragmentSpec) {
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return ["DOM", selector, fragmentClass, fragmentSpec];
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}
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function DOMFragment(selector, fragmentClass, fragmentSpec, domWrapFunction, jQueryWrapFunction) {
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this.selector = selector;
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this.fragmentClass = fragmentClass;
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this.fragmentSpec = fragmentSpec;
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this.domWrapFunction = domWrapFunction;
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this.jQueryWrapFunction = jQueryWrapFunction;
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this.nodes = this.buildNodes();
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}
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DOMFragment.prototype.boot = function () {
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var self = this;
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var specification = self.domWrapFunction(self.selector, self.fragmentClass, self.fragmentSpec);
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Network.spawn(new Network(function () {
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Syndicate.JQuery.spawnJQueryDriver(self.selector+" > ."+self.fragmentClass,
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1,
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self.jQueryWrapFunction);
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Network.spawn({
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boot: function () {
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return Patch.sub(Patch.advertise(specification), 1);
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},
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handleEvent: function (e) {
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if (e.type === "stateChange" && e.patch.hasRemoved()) {
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Network.exitNetwork();
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}
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}
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});
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}));
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return Patch.sub(specification).andThen(Patch.pub(specification));
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};
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DOMFragment.prototype.handleEvent = function (e) {
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if (e.type === "stateChange" && e.patch.hasRemoved()) {
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for (var i = 0; i < this.nodes.length; i++) {
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var n = this.nodes[i];
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n.parentNode.removeChild(n);
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}
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Network.exit();
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}
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};
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///////////////////////////////////////////////////////////////////////////
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function isAttributes(x) {
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return Array.isArray(x) && ((x.length === 0) || Array.isArray(x[0]));
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}
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DOMFragment.prototype.interpretSpec = function (spec) {
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// Fragment specs are roughly JSON-equivalents of SXML.
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// spec ::== ["tag", [["attr", "value"], ...], spec, spec, ...]
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// | ["tag", spec, spec, ...]
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// | "cdata"
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if (typeof(spec) === "string" || typeof(spec) === "number") {
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return document.createTextNode(spec);
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} else if ($.isArray(spec)) {
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var tagName = spec[0];
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var hasAttrs = isAttributes(spec[1]);
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var attrs = hasAttrs ? spec[1] : {};
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var kidIndex = hasAttrs ? 2 : 1;
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// Wow! Such XSS! Many hacks! So vulnerability! Amaze!
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var n = document.createElement(tagName);
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for (var i = 0; i < attrs.length; i++) {
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n.setAttribute(attrs[i][0], attrs[i][1]);
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}
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for (var i = kidIndex; i < spec.length; i++) {
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n.appendChild(this.interpretSpec(spec[i]));
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}
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return n;
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} else {
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throw new Error("Ill-formed DOM specification");
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}
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};
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DOMFragment.prototype.buildNodes = function () {
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var self = this;
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var nodes = [];
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$(self.selector).each(function (index, domNode) {
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var n = self.interpretSpec(self.fragmentSpec.toJS());
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n.classList.add(self.fragmentClass);
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domNode.appendChild(n);
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nodes.push(n);
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});
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return nodes;
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};
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///////////////////////////////////////////////////////////////////////////
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module.exports.spawnDOMDriver = spawnDOMDriver;
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module.exports.defaultWrapFunction = defaultWrapFunction;
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