From 8df2d459323ce2a2b956f19de91fdd697694d081 Mon Sep 17 00:00:00 2001
From: KellerCai <2233768403@qq.com>
Date: Sun, 9 Oct 2022 23:04:46 +0800
Subject: [PATCH] feat: upgrade tags view (#20)

---
 src/layout/components/TagsView/ScrollPane.vue | 82 +++++++++++++++++--
 src/layout/components/TagsView/index.vue      |  5 +-
 src/styles/variables.css                      |  1 +
 3 files changed, 78 insertions(+), 10 deletions(-)

diff --git a/src/layout/components/TagsView/ScrollPane.vue b/src/layout/components/TagsView/ScrollPane.vue
index eec31e4..438f4af 100644
--- a/src/layout/components/TagsView/ScrollPane.vue
+++ b/src/layout/components/TagsView/ScrollPane.vue
@@ -1,15 +1,81 @@
+<script lang="ts" setup>
+import { ref } from "vue"
+import { ElScrollbar } from "element-plus"
+import { ArrowLeft, ArrowRight } from "@element-plus/icons-vue"
+
+const scrollbarRef = ref<InstanceType<typeof ElScrollbar>>()
+const scrollbarContentRef = ref<HTMLDivElement>()
+
+/** 当前滚动条距离左边的距离 */
+let currentScrollLeft = 0
+/** 每次滚动距离 */
+const translateDistance = 200
+
+/** 滚动时触发 */
+const scroll = ({ scrollLeft }: { scrollLeft: number }) => {
+  currentScrollLeft = scrollLeft
+}
+
+/** 点击滚动 */
+const scrollTo = (direction: "left" | "right") => {
+  let scrollLeft = 0
+  /** 可滚动内容的长度 */
+  const scrollbarContentRefWidth = scrollbarContentRef.value!.clientWidth
+  /** 滚动可视区宽度 */
+  const scrollbarRefWidth = scrollbarRef.value!.wrap$!.clientWidth
+  /** 最后剩余可滚动的宽度 */
+  const lastDistance = scrollbarContentRefWidth - scrollbarRefWidth - currentScrollLeft
+  // 没有横向滚动条，直接结束
+  if (scrollbarRefWidth > scrollbarContentRefWidth) return
+  if (direction === "left") {
+    scrollLeft = Math.max(0, currentScrollLeft - translateDistance)
+  } else {
+    scrollLeft = Math.min(currentScrollLeft + translateDistance, currentScrollLeft + lastDistance)
+  }
+  scrollbarRef.value!.setScrollLeft(scrollLeft)
+}
+</script>
+
 <template>
-  <el-scrollbar :vertical="false" class="scroll-container">
-    <slot />
-  </el-scrollbar>
+  <div class="scroll-container">
+    <el-icon class="arrow left" @click="scrollTo('left')">
+      <ArrowLeft />
+    </el-icon>
+    <el-scrollbar ref="scrollbarRef" @scroll="scroll">
+      <div ref="scrollbarContentRef" class="scrollbar-content">
+        <slot />
+      </div>
+    </el-scrollbar>
+    <el-icon class="arrow right" @click="scrollTo('right')">
+      <ArrowRight />
+    </el-icon>
+  </div>
 </template>
 
 <style lang="scss" scoped>
 .scroll-container {
-  // 超出窗口长度时，显示滚动条
-  white-space: nowrap;
-  position: relative;
-  overflow: hidden;
-  width: 100%;
+  height: 100%;
+  user-select: none;
+  display: flex;
+  justify-content: space-between;
+  .arrow {
+    width: 40px;
+    height: 100%;
+    cursor: pointer;
+    &.left {
+      box-shadow: 5px 0 5px -6px #ccc;
+    }
+    &.right {
+      box-shadow: -5px 0 5px -6px #ccc;
+    }
+  }
+  .el-scrollbar {
+    flex: 1;
+    // 横向超出窗口长度时，显示滚动条
+    white-space: nowrap;
+    .scrollbar-content {
+      display: inline-block;
+    }
+  }
 }
 </style>
diff --git a/src/layout/components/TagsView/index.vue b/src/layout/components/TagsView/index.vue
index 11b0436..1bae2d7 100644
--- a/src/layout/components/TagsView/index.vue
+++ b/src/layout/components/TagsView/index.vue
@@ -198,6 +198,7 @@ onMounted(() => {
       height: 26px;
       line-height: 26px;
       border: 1px solid var(--v3-tagsview-tag-border-color);
+      border-radius: var(--v3-tagsview-tag-border-radius);
       color: var(--v3-tagsview-tag-text-color);
       background-color: var(--v3-tagsview-tag-bg-color);
       padding: 0 8px;
@@ -205,10 +206,10 @@ onMounted(() => {
       margin-left: 5px;
       margin-top: 4px;
       &:first-of-type {
-        margin-left: 15px;
+        margin-left: 5px;
       }
       &:last-of-type {
-        margin-right: 15px;
+        margin-right: 5px;
       }
       &.active {
         background-color: var(--v3-tagsview-tag-active-bg-color);
diff --git a/src/styles/variables.css b/src/styles/variables.css
index 2c71c15..5383f70 100644
--- a/src/styles/variables.css
+++ b/src/styles/variables.css
@@ -24,6 +24,7 @@
   --v3-tagsview-tag-active-text-color: #ffffff;
   --v3-tagsview-tag-bg-color: #ffffff;
   --v3-tagsview-tag-active-bg-color: #409eff;
+  --v3-tagsview-tag-border-radius: 2px;
   --v3-tagsview-tag-border-color: #d8dce5;
   --v3-tagsview-tag-active-border-color: #409eff;
   --v3-tagsview-tag-active-before-color: #ffffff;