refactor: 虚拟表格与contextmenu菜单优化

mayfly_go_web/src/components/contextmenu/index.vue

@@ -1,11 +1,11 @@
 <template>
-    <transition name="el-zoom-in-center">
+    <transition @enter="onEnter" name="el-zoom-in-center">
         <div
             aria-hidden="true"
             class="el-dropdown__popper el-popper is-light is-pure custom-contextmenu"
             role="tooltip"
             data-popper-placement="bottom"
-            :style="`top: ${dropdowns.y + 5}px;left: ${dropdowns.x}px;`"
+            :style="`top: ${state.dropdown.y + 5}px;left: ${state.dropdown.x}px;`"
             :key="Math.random()"
             v-show="state.isShow && !allHide"
         >
@@ -25,7 +25,7 @@
                     </li>
                 </template>
             </ul>
-            <div class="el-popper__arrow" :style="{ left: `${state.arrowLeft}px` }"></div>
+            <div v-if="state.arrowLeft > 0" class="el-popper__arrow" :style="{ left: `${state.arrowLeft}px` }"></div>
         </div>
     </transition>
 </template>
@@ -33,6 +33,8 @@
 <script setup lang="ts" name="layoutTagsViewContextmenu">
 import { computed, reactive, onMounted, onUnmounted, watch } from 'vue';
 import { ContextmenuItem } from './index';
+import { useViewport } from '@/common/use';
+import SvgIcon from '@/components/svgIcon/index.vue';
 
 // 定义父组件传过来的值
 const props = defineProps({
@@ -54,14 +56,56 @@ const props = defineProps({
 // 定义子组件向父组件传值/事件
 const emit = defineEmits(['currentContextmenuClick']);
 
+const { vw, vh } = useViewport();
+
 // 定义变量内容
 const state = reactive({
     isShow: false,
     dropdownList: [] as ContextmenuItem[],
     item: {} as any,
     arrowLeft: 10,
+    dropdown: {
+        x: 0,
+        y: 0,
+    },
 });
 
+// 下拉菜单宽高
+let contextmenuWidth = 117;
+let contextmenuHeight = 117;
+// 下拉菜单元素
+let ele = null as any;
+
+const onEnter = (el: any) => {
+    if (ele || el.offsetHeight == 0) {
+        return;
+    }
+
+    ele = el;
+    contextmenuHeight = el.offsetHeight;
+    contextmenuWidth = el.offsetWidth;
+    setDropdowns(props.dropdown);
+};
+
+const setDropdowns = (dropdown: any) => {
+    let { x, y } = dropdown;
+
+    state.arrowLeft = 10;
+
+    //  `Dropdown 下拉菜单` 的宽度
+    if (x + contextmenuWidth > vw.value) {
+        state.arrowLeft = contextmenuWidth - (vw.value - x);
+        x = vw.value - contextmenuWidth - 5;
+    }
+    if (y + contextmenuHeight > vh.value) {
+        y = vh.value - contextmenuHeight - 5;
+        state.arrowLeft = 0;
+    }
+
+    state.dropdown.x = x;
+    state.dropdown.y = y;
+};
+
 const allHide = computed(() => {
     for (let item of state.dropdownList) {
         if (!item.isHide(state.item)) {
@@ -71,18 +115,6 @@ const allHide = computed(() => {
     return true;
 });
 
-// 父级传过来的坐标 x,y 值
-const dropdowns = computed(() => {
-    // 117 为 `Dropdown 下拉菜单` 的宽度
-    if (props.dropdown.x + 117 > document.documentElement.clientWidth) {
-        return {
-            x: document.documentElement.clientWidth - 117 - 5,
-            y: props.dropdown.y,
-        };
-    } else {
-        return props.dropdown;
-    }
-});
 // 当前项菜单点击
 const onCurrentContextmenuClick = (ci: ContextmenuItem) => {
     // 存在点击事件，则触发该事件函数
@@ -91,6 +123,7 @@ const onCurrentContextmenuClick = (ci: ContextmenuItem) => {
     }
     emit('currentContextmenuClick', { id: ci.clickId, item: state.item });
 };
+
 // 打开右键菜单：判断是否固定，固定则不显示关闭按钮
 const openContextmenu = (item: any) => {
     state.item = item;
@@ -99,30 +132,34 @@ const openContextmenu = (item: any) => {
         state.isShow = true;
     }, 10);
 };
+
 // 关闭右键菜单
 const closeContextmenu = () => {
     state.isShow = false;
 };
+
 // 监听页面监听进行右键菜单的关闭
 onMounted(() => {
     document.body.addEventListener('click', closeContextmenu);
     state.dropdownList = props.items;
 });
+
 // 页面卸载时，移除右键菜单监听事件
 onUnmounted(() => {
     document.body.removeEventListener('click', closeContextmenu);
 });
-// 监听下拉菜单位置
+
 watch(
     () => props.dropdown,
-    ({ x }) => {
-        if (x + 117 > document.documentElement.clientWidth) state.arrowLeft = 117 - (document.documentElement.clientWidth - x);
-        else state.arrowLeft = 10;
+    () => {
+        // 元素置为空，重新在onEnter赋值元素，否则会造成堆栈溢出
+        ele = null;
     },
     {
         deep: true,
     }
 );
+
 watch(
     () => props.items,
     (x: any) => {