#5447 - Added fixed precision class, updated multitail calculations w…

…ith fixed precision usage (#5450)

- fixed tails movement

packages/ketcher-core/src/domain/entities/fixedPrecision.ts

@@ -0,0 +1,63 @@
+export class FixedPrecisionCoordinates {
+  static MULTIPLIER = 10 ** 5;
+  public readonly value: number;
+
+  static fromFloatingPrecision(value: number) {
+    return new FixedPrecisionCoordinates(
+      Math.round(value * FixedPrecisionCoordinates.MULTIPLIER),
+    );
+  }
+
+  constructor(value: number | FixedPrecisionCoordinates) {
+    this.value =
+      value instanceof FixedPrecisionCoordinates ? value.value : value;
+  }
+
+  add(
+    fixedPrecisionValue: FixedPrecisionCoordinates,
+  ): FixedPrecisionCoordinates {
+    return new FixedPrecisionCoordinates(
+      this.value + fixedPrecisionValue.value,
+    );
+  }
+
+  sub(
+    fixedPrecisionValue: FixedPrecisionCoordinates,
+  ): FixedPrecisionCoordinates {
+    return new FixedPrecisionCoordinates(
+      this.value - fixedPrecisionValue.value,
+    );
+  }
+
+  multiply(
+    value: FixedPrecisionCoordinates | number,
+  ): FixedPrecisionCoordinates {
+    const isFixedPrecision = value instanceof FixedPrecisionCoordinates;
+    const multiplier = isFixedPrecision ? value.value : value;
+    const result = this.value * multiplier;
+    return new FixedPrecisionCoordinates(
+      Math.round(
+        isFixedPrecision
+          ? result / FixedPrecisionCoordinates.MULTIPLIER
+          : result,
+      ),
+    );
+  }
+
+  divide(value: FixedPrecisionCoordinates | number): FixedPrecisionCoordinates {
+    const isFixedPrecision = value instanceof FixedPrecisionCoordinates;
+    const delimiter = isFixedPrecision ? value.value : value;
+    const result = this.value / delimiter;
+    return new FixedPrecisionCoordinates(
+      Math.round(
+        isFixedPrecision
+          ? result * FixedPrecisionCoordinates.MULTIPLIER
+          : result,
+      ),
+    );
+  }
+
+  getFloatingPrecision(): number {
+    return this.value / FixedPrecisionCoordinates.MULTIPLIER;
+  }
+}