1 files changed, 119 insertions, 0 deletions
diff --git a/src/modules/core/event.js b/src/modules/core/event.js
new file mode 100644
index 0000000..2fcaf58
--- /dev/null
+++ b/src/modules/core/event.js
@@ -0,0 +1,119 @@
+import { delimiter } from './regex.js'
+import { makeInstance } from '../../utils/adopter.js'
+
+let listenerId = 0
+
+function getEvents (node) {
+  const n = makeInstance(node).getEventHolder()
+  if (!n.events) n.events = {}
+  return n.events
+}
+
+function getEventTarget (node) {
+  return makeInstance(node).getEventTarget()
+}
+
+function clearEvents (node) {
+  const n = makeInstance(node).getEventHolder()
+  if (n.events) n.events = {}
+}
+
+// Add event binder in the SVG namespace
+export function on (node, events, listener, binding, options) {
+  var l = listener.bind(binding || node)
+  var bag = getEvents(node)
+  var n = getEventTarget(node)
+
+  // events can be an array of events or a string of events
+  events = Array.isArray(events) ? events : events.split(delimiter)
+
+  // add id to listener
+  if (!listener._svgjsListenerId) {
+    listener._svgjsListenerId = ++listenerId
+  }
+
+  events.forEach(function (event) {
+    var ev = event.split('.')[0]
+    var ns = event.split('.')[1] || '*'
+
+    // ensure valid object
+    bag[ev] = bag[ev] || {}
+    bag[ev][ns] = bag[ev][ns] || {}
+
+    // reference listener
+    bag[ev][ns][listener._svgjsListenerId] = l
+
+    // add listener
+    n.addEventListener(ev, l, options || false)
+  })
+}
+
+// Add event unbinder in the SVG namespace
+export function off (node, events, listener, options) {
+  var bag = getEvents(node)
+  var n = getEventTarget(node)
+
+  // listener can be a function or a number
+  if (typeof listener === 'function') {
+    listener = listener._svgjsListenerId
+    if (!listener) return
+  }
+
+  // events can be an array of events or a string or undefined
+  events = Array.isArray(events) ? events : (events || '').split(delimiter)
+
+  events.forEach(function (event) {
+    var ev = event && event.split('.')[0]
+    var ns = event && event.split('.')[1]
+    var namespace, l
+
+    if (listener) {
+      // remove listener reference
+      if (bag[ev] && bag[ev][ns || '*']) {
+        // removeListener
+        n.removeEventListener(ev, bag[ev][ns || '*'][listener], options || false)
+
+        delete bag[ev][ns || '*'][listener]
+      }
+    } else if (ev && ns) {
+      // remove all listeners for a namespaced event
+      if (bag[ev] && bag[ev][ns]) {
+        for (l in bag[ev][ns]) { off(n, [ev, ns].join('.'), l) }
+
+        delete bag[ev][ns]
+      }
+    } else if (ns) {
+      // remove all listeners for a specific namespace
+      for (event in bag) {
+        for (namespace in bag[event]) {
+          if (ns === namespace) { off(n, [event, ns].join('.')) }
+        }
+      }
+    } else if (ev) {
+      // remove all listeners for the event
+      if (bag[ev]) {
+        for (namespace in bag[ev]) { off(n, [ev, namespace].join('.')) }
+
+        delete bag[ev]
+      }
+    } else {
+      // remove all listeners on a given node
+      for (event in bag) { off(n, event) }
+
+      clearEvents(node)
+    }
+  })
+}
+
+export function dispatch (node, event, data) {
+  var n = getEventTarget(node)
+
+  // Dispatch event
+  if (event instanceof window.Event) {
+    n.dispatchEvent(event)
+  } else {
+    event = new window.CustomEvent(event, { detail: data, cancelable: true })
+    n.dispatchEvent(event)
+  }
+  return event
+}