89 lines
2.6 KiB
JavaScript
89 lines
2.6 KiB
JavaScript
// DOM fragment display driver
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function spawnDOMDriver() {
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var d = new DemandMatcher(["DOM", __, __, __], 0, {demandSideIsSubscription: false});
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d.onDemandIncrease = function (r) {
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var selector = r.pattern[1];
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var fragmentClass = r.pattern[2];
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var fragmentSpec = r.pattern[3];
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World.spawn(new DOMFragment(selector, fragmentClass, fragmentSpec),
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[sub(["DOM", selector, fragmentClass, fragmentSpec]),
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sub(["DOM", selector, fragmentClass, fragmentSpec], 0, 1)]);
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};
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World.spawn(d);
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}
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function DOMFragment(selector, fragmentClass, fragmentSpec) {
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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.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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World.spawn(new World(function () {
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spawnJQueryDriver(self.selector+" > ."+self.fragmentClass, 1);
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World.spawn({
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maxRouteCount: 0,
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handleEvent: function (e) {
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if (e.type === "routes") {
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this.maxRouteCount = Math.max(this.maxRouteCount, e.routes.length);
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if (e.routes.length < this.maxRouteCount) {
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World.shutdownWorld();
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}
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}
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}
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}, [sub(["DOM", self.selector, self.fragmentClass, self.fragmentSpec], 1, 1)]);
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}));
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};
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DOMFragment.prototype.handleEvent = function (e) {
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if (e.type === "routes" && e.routes.length === 0) {
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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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World.exit();
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}
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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 = $.isPlainObject(spec[1]);
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var attrs = hasAttrs ? spec[1] : {};
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var kidIndex = hasAttrs ? 2 : 1;
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// Wow! Such XSS! Many hacks! So vulnerability! Amaze!
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var n = document.createElement(tagName);
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for (var attr in attrs) {
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if (attrs.hasOwnProperty(attr)) {
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n.setAttribute(attr, attrs[attr]);
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}
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}
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for (var i = kidIndex; i < spec.length; i++) {
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n.appendChild(this.interpretSpec(spec[i]));
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}
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return n;
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}
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};
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DOMFragment.prototype.buildNodes = function () {
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var self = this;
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var nodes = [];
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$(self.selector).each(function (index, domNode) {
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var n = self.interpretSpec(self.fragmentSpec);
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n.className = 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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