fix: 浮点数精度丢失导致画布缩放卡死 (#4356)

* fix: 浮点数精度丢失导致画布缩放卡死

* chore: 移除多余的代码

packages/x6/src/graph/mousewheel.ts

@@ -81,9 +81,9 @@ export class MouseWheel extends Base {
           // webkit and to avoid rounding errors for zoom steps
           this.cumulatedFactor =
             Math.round(this.currentScale * factor * 20) / 20 / this.currentScale
-          if (this.cumulatedFactor === 1) {
-            this.cumulatedFactor = 1.05
-          }
+        }
+        if (this.cumulatedFactor <= 1) {
+          this.cumulatedFactor = 1.05
         }
       } else {
         // zoomout
@@ -98,9 +98,9 @@ export class MouseWheel extends Base {
             Math.round(this.currentScale * (1 / factor) * 20) /
             20 /
             this.currentScale
-          if (this.cumulatedFactor === 1) {
-            this.cumulatedFactor = 0.95
-          }
+        }
+        if (this.cumulatedFactor >= 1) {
+          this.cumulatedFactor = 0.95
         }
       }
 
@@ -114,6 +114,7 @@ export class MouseWheel extends Base {
       let targetScale = this.graph.transform.clampScale(
         currentScale * this.cumulatedFactor,
       )
+
       const minScale = this.widgetOptions.minScale || Number.MIN_SAFE_INTEGER
       const maxScale = this.widgetOptions.maxScale || Number.MAX_SAFE_INTEGER
       targetScale = NumberExt.clamp(targetScale, minScale, maxScale)