define(function () { return function () { var objects = { nodes: {}, links: {} } var targets = [] var self = this function saveState(d) { var s = "#!" if (d) { if ("node" in d) s += "n:" + encodeURIComponent(d.node.nodeinfo.node_id) if ("link" in d) s += "l:" + encodeURIComponent(linkId(d.link)) } window.history.pushState(s, undefined, s) } function resetView(push) { push = trueDefault(push) targets.forEach( function (t) { t.resetView() }) if (push) saveState() } function gotoNode(d) { if (!d) return false targets.forEach( function (t) { t.gotoNode(d) }) return true } function gotoLink(d) { if (!d) return false targets.forEach( function (t) { t.gotoLink(d) }) return true } function loadState(s) { if (!s) return false if (!s.startsWith("#!")) return false var args = s.slice(2).split(":") var id if (args[1] !== undefined) { id = decodeURIComponent(args[1]) if (args[0] === "n" && id in objects.nodes) { gotoNode(objects.nodes[id]) return true } if (args[0] === "l" && id in objects.links) { gotoLink(objects.links[id]) return true } } return false } self.start = function () { if (!loadState(window.location.hash)) resetView(false) window.onpopstate = function (d) { if (!loadState(d.state)) resetView(false) } } self.node = function (d) { return function () { if (gotoNode(d)) saveState({ node: d }) return false } } self.link = function (d) { return function () { if (gotoLink(d)) saveState({ link: d }) return false } } self.reset = function () { resetView() saveState() } self.addTarget = function (d) { targets.push(d) } self.setData = function (data) { objects.nodes = {} objects.links = {} data.nodes.all.forEach( function (d) { objects.nodes[d.nodeinfo.node_id] = d }) data.links.forEach( function (d) { objects.links[linkId(d)] = d }) } return self } })