fix: 输入法相关问题 (#81)

* fix: 输入法相关问题

* docs: 补充注释

src/defaultEditorOptions.js

@@ -34,6 +34,7 @@ import FullScreen from './plugin/FullScreen'
 import ExtraFormat from './plugin/ExtraFormat'
 import RemoveFormat from './plugin/RemoveFormat/RemoveFormat'
 import AttachmentUpload from './plugin/AttachmentUpload'
+import FixComposing from './plugin/FixComposing'
 
 export default {
   plugins: [
@@ -67,7 +68,8 @@ export default {
     FullScreen,
     ExtraFormat,
     RemoveFormat,
-    AttachmentUpload
+    AttachmentUpload,
+    FixComposing
   ],
   toolbar: [
     'undo',

src/plugin/FixComposing.js

@@ -0,0 +1,30 @@
+/**
+ * @hack 如果哪天崩了要看回 @ckeditor/ckeditor5-engine/src/view/{view|renderer}.js 源码
+ * 已知负面影响：在线协作功能
+ *
+ * 详情看相关 issues & pr：
+ * - https://github.com/ckeditor/ckeditor5/issues/5877
+ * - https://github.com/ckeditor/ckeditor5-engine/pull/861
+ *
+ * PS：这个可能是更优的方案，如果还有问题的话可以参考
+ * https://github.com/ckeditor/ckeditor5/issues/5877#issuecomment-566369164
+ * https://github.com/mycolorway/ckeditor5-engine/commit/7d921207054e327088fe7496a8cde451ddd87423
+ */
+export default function(editor) {
+  const {_renderer, document} = editor.editing.view
+  /**
+   * 注入 isComposing，在 render 中使用
+   * @see https://github.com/ckeditor/ckeditor5-engine/pull/861/files#diff-644366cecbdf61171130f59482de38e0R114
+   */
+  _renderer.bind('isComposing').to(document)
+  const {render} = _renderer
+  /**
+   * 输入法进行间停止 render
+   * https://github.com/ckeditor/ckeditor5-engine/pull/861/files#diff-4c87133ed830fc4ea0646426deba32cfR188
+   */
+  _renderer.render = function() {
+    // console.log('isComposing', this.isComposing)
+    if (this.isComposing) return
+    return render.call(this)
+  }
+}