feat: 🐛 support click on the non-text area without adding a new label (#1894)

Co-authored-by: hetengfei <hetengfei@able-elec.com>

packages/x6/src/registry/tool/editor.ts

@@ -49,6 +49,7 @@ export class CellEditor extends ToolsView.ToolItem<
       const parent = target.parentElement
       const isEdgeLabel =
         parent && Dom.hasClass(parent, this.prefixClassName('edge-label'))
+      const labelAddable = this.options.labelAddable
       if (isEdgeLabel) {
         const index = parent.getAttribute('data-index') || '0'
         this.labelIndex = parseInt(index, 10)
@@ -57,6 +58,9 @@ export class CellEditor extends ToolsView.ToolItem<
         pos = new Point(translation.tx, translation.ty)
         minWidth = Dom.getBBox(target).width
       } else {
+        if (!labelAddable) {
+          return this
+        }
         pos = graph.clientToLocal(Point.create(e.clientX, e.clientY))
         const view = this.cellView as EdgeView
         const d = view.path.closestPointLength(pos)
@@ -147,6 +151,7 @@ export namespace CellEditor {
       color: string
       backgroundColor: string
     }
+    labelAddable: boolean
     getText: (
       this: CellView,
       args: {
@@ -203,6 +208,7 @@ export namespace CellEditor {
       color: '#000',
       backgroundColor: '#fff',
     },
+    labelAddable: true,
     getText({ cell, index }) {
       if (index === -1) {
         return ''