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src/common/js/commonJS.js

@@ -2148,7 +2148,32 @@ export default {
                 ed.insertContent('–');
             }
         });
-
+        ed.ui.registry.addMenuButton('MoreSymbols', {
+            text: '···', // 按钮显示的三个点
+            tooltip: 'More Special Characters',
+            onAction: () => {}, // 菜单主按钮点击通常不执行操作，由子菜单执行
+            fetch: (callback) => {
+              const items = [
+                {
+                  type: 'menuitem',
+                  text: 'en-dash (短划线)',//短划线
+                  onAction: () => ed.insertContent('–')
+                },
+                {
+                  type: 'menuitem',
+                  text: 'minus sign (减号)',//减号
+                  onAction: () => ed.insertContent('−')
+                },
+                {
+                  type: 'menuitem',
+                  text: 'hyphen (连接符)',
+                  onAction: () => ed.insertContent('-')
+                },
+               
+              ];
+              callback(items);
+            }
+          });
 
         ed.ui.registry.addButton('removeBlue', {
             text: 'Blue', // 按钮文本