【页面编辑】当前阅读页显示第5页，进入页面编辑，如果第4页挪到10页，那返回到阅读页面应该是第4页(已修复)

PDF Office/PDF Master/Class/PDFTools/PageEdit/Controller/KMPDFEditViewController.swift

@@ -540,7 +540,7 @@ class KMPDFEditViewController: KMPDFThumbViewBaseController {
             self.listView?.document.insertPageObject(page, at: UInt(insertIndex+index))
             selectIndexs.insert(insertIndex+index)
             if (currentPage?.pageIndex() == page.pageIndex()) {
-                self._listViewCurrentIndex = insertIndex+index
+//                self._listViewCurrentIndex = insertIndex+index
             }
         }
         
@@ -1103,6 +1103,9 @@ extension KMPDFEditViewController {
     }
     
     func listViewCurrentPageUpdateForDrag(indexs: IndexSet, toIndex: Int) {
+        if (indexs.isEmpty) {
+            return
+        }
         // listView 当前页面 被拖拽
         if (indexs.contains(self._listViewCurrentIndex)) {
 //            let idx = indexs.firstIndex(of: self._listViewCurrentIndex)
@@ -1130,7 +1133,25 @@ extension KMPDFEditViewController {
                 toIndexOffset -= 1
             }
             let insertIndex = max(0, toIndex-toIndexOffset)
-//            self._listViewCurrentIndex = insertIndex+idx
+            self._listViewCurrentIndex = insertIndex+idx
+        } else {
+            var forwardCnt = 0
+            var nextCnt = 0
+            for index in indexs {
+                if (index > self._listViewCurrentIndex) {
+                    nextCnt += 1
+                } else {
+                    forwardCnt += 1
+                }
+            }
+            
+            if (self._listViewCurrentIndex > toIndex) { // 插入到目标前面, 前面不管，只管后面的格式
+                self._listViewCurrentIndex += nextCnt
+            } else if (self._listViewCurrentIndex < toIndex) { // 插入到目标后面， 后面不管，只管前面的格式
+                self._listViewCurrentIndex = max(0, self._listViewCurrentIndex - forwardCnt)
+            } else { // 插入到目标位置 [跟插入到目标后面一样]
+                self._listViewCurrentIndex = max(0, self._listViewCurrentIndex - forwardCnt)
+            }
         }
     }
 }