+ [task#129807] add isSameLine function for think3c widget.

lib/zin/wg/think3c/js/v1.js

@@ -200,6 +200,21 @@ function calculateCardPosition(region, index)
     }
 }
 
+/**
+ * 判断在同一行。
+ * Judge on the same line.
+ *
+ * @param  array  currentItem
+ * @param  array  nextItem
+ * @param  number offset
+ * @access public
+ * @return boolean
+ */
+function isSameLine(currentItem, nextItem, offset)
+{
+    return currentItem[1] == nextItem[1] || Math.abs(currentItem[1] - nextItem[1]) < offset;
+}
+
 /**
  * 获取最大左侧坐标和最小右侧坐标。
  * Get maxLeft and minRight.