From 20f3cb3e2028e455b49a4d1947ac8f02186363af Mon Sep 17 00:00:00 2001
From: liuyang <qwbfsa@gmail.com>
Date: Wed, 26 Aug 2020 14:18:25 +0800
Subject: [PATCH] fix(array unique very slow): fix it

---
 src/controllers/handler.js | 29 ++++++++++++++++++++++++++---
 src/store/index.js         |  3 +++
 src/utils/util.js          | 13 +++++++------
 3 files changed, 36 insertions(+), 9 deletions(-)

diff --git a/src/controllers/handler.js b/src/controllers/handler.js
index f3182ed..2f9291d 100644
--- a/src/controllers/handler.js
+++ b/src/controllers/handler.js
@@ -108,7 +108,7 @@ export default function luckysheetHandler() {
     const _locale = locale();
     const locale_drag = _locale.drag;
     const locale_info = _locale.info;
-    let prev
+    let prev, mousewheelArrayUniqueTimeout;
     $("#luckysheet-grid-window-1").mousewheel(function (event, delta) {
         let scrollLeft = $("#luckysheet-scrollbar-x").scrollLeft(), 
             scrollTop = $("#luckysheet-scrollbar-y").scrollTop();
@@ -123,8 +123,26 @@ export default function luckysheetHandler() {
             visibledatacolumn_c = luckysheetFreezen.freezenverticaldata[3];
         }
 
-        visibledatacolumn_c = ArrayUnique(visibledatacolumn_c);
-        visibledatarow_c = ArrayUnique(visibledatarow_c);
+        clearTimeout(mousewheelArrayUniqueTimeout);
+        
+        if(Store.visibledatacolumn_unique!=null){
+            visibledatacolumn_c = Store.visibledatacolumn_unique;
+        }
+        else{
+            visibledatacolumn_c = ArrayUnique(visibledatacolumn_c);
+            Store.visibledatacolumn_unique = visibledatacolumn_c;
+        }
+
+        if(Store.visibledatarow_unique!=null){
+            visibledatarow_c = Store.visibledatarow_unique;
+        }
+        else{
+            visibledatarow_c = ArrayUnique(visibledatarow_c);
+            Store.visibledatarow_unique = visibledatarow_c;
+        }
+
+        // visibledatacolumn_c = ArrayUnique(visibledatacolumn_c);
+        // visibledatarow_c = ArrayUnique(visibledatarow_c);
 
         let col_st = luckysheet_searcharray(visibledatacolumn_c, scrollLeft);
         let row_st = luckysheet_searcharray(visibledatarow_c, scrollTop);
@@ -179,6 +197,11 @@ export default function luckysheetHandler() {
 
             $("#luckysheet-scrollbar-x").scrollLeft(scrollLeft);
         }
+
+        mousewheelArrayUniqueTimeout = setTimeout(() => {
+            Store.visibledatacolumn_unique = null;
+            Store.visibledatarow_unique = null;
+        }, 200);
     });
 
     $("#luckysheet-scrollbar-x").scroll(function(){
diff --git a/src/store/index.js b/src/store/index.js
index 06b092c..20ec8fc 100644
--- a/src/store/index.js
+++ b/src/store/index.js
@@ -118,6 +118,9 @@ const Store = {
     measureTextCacheTimeOut:null,
 
     zoomRatio:1,
+
+    visibledatacolumn_unique:null,
+    visibledatarow_unique:null,
 }
 
 export default Store;
\ No newline at end of file
diff --git a/src/utils/util.js b/src/utils/util.js
index 90f294b..7862bcd 100644
--- a/src/utils/util.js
+++ b/src/utils/util.js
@@ -278,17 +278,18 @@ function getByteLen(val) {
 
 //数组去重
 function ArrayUnique(dataArr) {
-    let arr = [];
-
+    let result = [];
+    let obj = {};
     if (dataArr.length > 0) {
         for (let i = 0; i < dataArr.length; i++) {
-            if (arr.indexOf(dataArr[i]) == -1) {
-                arr.push(dataArr[i]);
+            let item = dataArr[i];
+            if (!obj[item]) {
+                result.push(item);
+                obj[item] = 1;
             }
         }
     }
-
-    return arr;
+    return result
 }
 
 //获取字体配置