Initial commit as of 2018-10-16

assets/js/core/emitter.js

@@ -0,0 +1,63 @@
+import EventEmitter from 'eventemitter3';
+import logger from './logger';
+
+let debug = logger('quill:events');
+
+const EVENTS = ['selectionchange', 'mousedown', 'mouseup', 'click'];
+
+EVENTS.forEach(function(eventName) {
+  document.addEventListener(eventName, (...args) => {
+    [].slice.call(document.querySelectorAll('.ql-container')).forEach((node) => {
+      // TODO use WeakMap
+      if (node.__quill && node.__quill.emitter) {
+        node.__quill.emitter.handleDOM(...args);
+      }
+    });
+  });
+});
+
+
+class Emitter extends EventEmitter {
+  constructor() {
+    super();
+    this.listeners = {};
+    this.on('error', debug.error);
+  }
+
+  emit() {
+    debug.log.apply(debug, arguments);
+    super.emit.apply(this, arguments);
+  }
+
+  handleDOM(event, ...args) {
+    (this.listeners[event.type] || []).forEach(function({ node, handler }) {
+      if (event.target === node || node.contains(event.target)) {
+        handler(event, ...args);
+      }
+    });
+  }
+
+  listenDOM(eventName, node, handler) {
+    if (!this.listeners[eventName]) {
+      this.listeners[eventName] = [];
+    }
+    this.listeners[eventName].push({ node, handler })
+  }
+}
+
+Emitter.events = {
+  EDITOR_CHANGE        : 'editor-change',
+  SCROLL_BEFORE_UPDATE : 'scroll-before-update',
+  SCROLL_OPTIMIZE      : 'scroll-optimize',
+  SCROLL_UPDATE        : 'scroll-update',
+  SELECTION_CHANGE     : 'selection-change',
+  TEXT_CHANGE          : 'text-change'
+};
+Emitter.sources = {
+  API    : 'api',
+  SILENT : 'silent',
+  USER   : 'user'
+};
+
+
+export default Emitter;