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108 lines
3.0 KiB
108 lines
3.0 KiB
1 year ago
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var filterEvents = {};
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export var event = null;
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if (typeof document !== "undefined") {
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var element = document.documentElement;
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if (!("onmouseenter" in element)) {
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filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
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}
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}
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function filterContextListener(listener, index, group) {
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listener = contextListener(listener, index, group);
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return function(event) {
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var related = event.relatedTarget;
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if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
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listener.call(this, event);
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}
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};
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}
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function contextListener(listener, index, group) {
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return function(event1) {
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var event0 = event; // Events can be reentrant (e.g., focus).
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event = event1;
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try {
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listener.call(this, this.__data__, index, group);
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} finally {
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event = event0;
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}
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};
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}
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function parseTypenames(typenames) {
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return typenames.trim().split(/^|\s+/).map(function(t) {
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var name = "", i = t.indexOf(".");
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if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
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return {type: t, name: name};
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});
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}
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function onRemove(typename) {
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return function() {
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var on = this.__on;
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if (!on) return;
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for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
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if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
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this.removeEventListener(o.type, o.listener, o.capture);
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} else {
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on[++i] = o;
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}
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}
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if (++i) on.length = i;
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else delete this.__on;
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};
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}
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function onAdd(typename, value, capture) {
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var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
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return function(d, i, group) {
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var on = this.__on, o, listener = wrap(value, i, group);
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if (on) for (var j = 0, m = on.length; j < m; ++j) {
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if ((o = on[j]).type === typename.type && o.name === typename.name) {
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this.removeEventListener(o.type, o.listener, o.capture);
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this.addEventListener(o.type, o.listener = listener, o.capture = capture);
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o.value = value;
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return;
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}
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}
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this.addEventListener(typename.type, listener, capture);
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o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
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if (!on) this.__on = [o];
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else on.push(o);
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};
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}
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export default function(typename, value, capture) {
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var typenames = parseTypenames(typename + ""), i, n = typenames.length, t;
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if (arguments.length < 2) {
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var on = this.node().__on;
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if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
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for (i = 0, o = on[j]; i < n; ++i) {
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if ((t = typenames[i]).type === o.type && t.name === o.name) {
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return o.value;
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}
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}
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}
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return;
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}
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on = value ? onAdd : onRemove;
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if (capture == null) capture = false;
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for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
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return this;
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}
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export function customEvent(event1, listener, that, args) {
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var event0 = event;
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event1.sourceEvent = event;
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event = event1;
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try {
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return listener.apply(that, args);
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} finally {
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event = event0;
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}
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}
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