From 79635958a5f8dfe6faf02b661dae317fdb5bc051 Mon Sep 17 00:00:00 2001
From: 07akioni <07akioni2@gmail.com>
Date: Sun, 13 Oct 2019 21:13:32 +0800
Subject: [PATCH] fix(anchor): scroll

---
 packages/common/Affix/src/main.vue         | 21 ++++++++----
 packages/common/Anchor/src/Anchor.vue      | 40 ++++++++++++++++++++--
 styles/Anchor.scss                         |  6 +++-
 styles/themes/dark/components/Anchor.scss  |  2 +-
 styles/themes/light/components/Anchor.scss |  2 +-
 5 files changed, 59 insertions(+), 12 deletions(-)

diff --git a/packages/common/Affix/src/main.vue b/packages/common/Affix/src/main.vue
index 609416406..5631d017d 100644
--- a/packages/common/Affix/src/main.vue
+++ b/packages/common/Affix/src/main.vue
@@ -34,14 +34,15 @@ export default {
       container: null,
       stickToTop: false,
       stickToBottom: false,
-      memorizedTop: null
+      memorizedTop: null,
+      affixTop: null
     }
   },
   computed: {
     style () {
       const style = {}
-      if (this.affixed && this.memorizedTop !== null) {
-        style.top = `${this.memorizedTop}px`
+      if (this.affixed && this.affixTop !== null) {
+        style.top = `${this.affixTop}px`
       }
       return style
     },
@@ -51,6 +52,7 @@ export default {
   },
   mounted () {
     this.init()
+    this.memorizeTop()
   },
   beforeDestroy () {
     if (this.container) {
@@ -68,6 +70,12 @@ export default {
         this.container.addEventListener('scroll', this.handleScroll)
       }
     },
+    memorizeTop () {
+      const {
+        top
+      } = this.$el.getBoundingClientRect()
+      this.memorizedTop = top
+    },
     handleScroll (e) {
       const containerEl = this.container.nodeName === '#document' ? this.container.documentElement : this.container
       let scrollTop = containerEl.scrollTop
@@ -84,12 +92,11 @@ export default {
         this.stickToBottom = false
       }
       if (!originalAffixed && this.affixed) {
-        let {
-          top
-        } = this.$el.getBoundingClientRect()
         // console.log(e, this.$el.getBoundingClientRect().top)
-        this.memorizedTop = top
+        this.affixTop = this.memorizedTop
         // debugger
+      } else {
+        this.memorizeTop()
       }
     }
   }
diff --git a/packages/common/Anchor/src/Anchor.vue b/packages/common/Anchor/src/Anchor.vue
index 5856ef928..ddf3782ef 100644
--- a/packages/common/Anchor/src/Anchor.vue
+++ b/packages/common/Anchor/src/Anchor.vue
@@ -13,6 +13,9 @@
       <div
         ref="bar"
         class="n-anchor-rail__bar"
+        :class="{
+          'n-anchor-rail__bar--active': activeHref !== null
+        }"
       />
     </div>
     <slot />
@@ -31,6 +34,7 @@ function getOffsetTop (el, container) {
   const {
     top: containerTop
   } = container.getBoundingClientRect()
+  // console.log('elTop', elTop, 'containerTop', containerTop)
   return elTop - containerTop
 }
 
@@ -41,6 +45,10 @@ export default {
     target: {
       type: Function,
       default: null
+    },
+    bound: {
+      type: Number,
+      default: 12
     }
   },
   data () {
@@ -50,6 +58,20 @@ export default {
       container: null
     }
   },
+  watch: {
+    activeHref (value) {
+      if (value === null) {
+        const slotEl = this.$refs.slot
+        slotEl.style.maxWidth = `0px`
+        const barEl = this.$refs.bar
+        window.setTimeout(() => {
+          slotEl.style.top = null
+          barEl.style.top = null
+          // slotEl.style.top = null
+        }, 150)
+      }
+    }
+  },
   mounted () {
     this.init()
   },
@@ -84,8 +106,20 @@ export default {
     },
     setActiveHref (href) {
       this.activeHref = href
+      const idMatchResult = /#([^#]+)$/.exec(href)
+      if (idMatchResult) {
+        const linkEl = document.getElementById(idMatchResult[1])
+        if (linkEl) {
+          const top = getOffsetTop(linkEl, this.container) + (this.container.scrollTop || 0)
+          this.container.scrollTo({
+            top: top - this.bound
+          })
+          // this.handleScroll()
+        }
+      }
     },
     handleScroll () {
+      console.log('handleScroll')
       const links = []
       this.collectedLinkHrefs.forEach(href => {
         const idMatchResult = /#([^#]+)$/.exec(href)
@@ -105,8 +139,8 @@ export default {
       // const containerScrollTop = this.container.scrollTop
       // console.log(links)
       const activeLink = links.reduce((prevLink, link) => {
-        // console.log(link.top)
-        if (link.top < 5) {
+        console.log(link.top)
+        if (link.top <= this.bound) {
           if (prevLink === null) {
             return link
           } else if (link.top > prevLink.top) {
@@ -119,6 +153,8 @@ export default {
       }, null)
       if (activeLink) {
         this.activeHref = activeLink.href
+      } else {
+        this.activeHref = null
       }
     },
     init () {
diff --git a/styles/Anchor.scss b/styles/Anchor.scss
index ddb9a3c61..cf8a487fc 100644
--- a/styles/Anchor.scss
+++ b/styles/Anchor.scss
@@ -30,7 +30,11 @@
         left: 0;
         transition: top .15s $default-cubic-bezier, background-color .3s $default-cubic-bezier;
         width: 4px;
-        background-color: $--primary-6;
+        height: 21px;
+        background-color: transparent;
+        @include m(active) {
+          background-color: $--primary-6;
+        }
       }
       & + {
         @include b(anchor-link) {
diff --git a/styles/themes/dark/components/Anchor.scss b/styles/themes/dark/components/Anchor.scss
index ce6f10f36..a1b021804 100644
--- a/styles/themes/dark/components/Anchor.scss
+++ b/styles/themes/dark/components/Anchor.scss
@@ -1,3 +1,3 @@
 @mixin setup-dark-anchor {
-  $--anchor-rail-background-color: rgba(255, 255, 255, .15) !global;
+  $--anchor-rail-background-color: #404555 !global;
 }
\ No newline at end of file
diff --git a/styles/themes/light/components/Anchor.scss b/styles/themes/light/components/Anchor.scss
index 0da2202db..812387dc8 100644
--- a/styles/themes/light/components/Anchor.scss
+++ b/styles/themes/light/components/Anchor.scss
@@ -1,3 +1,3 @@
 @mixin setup-light-anchor {
-  $--anchor-rail-background-color: rgba(0, 0, 0, .15) !global;
+  $--anchor-rail-background-color: #d9d9d9 !global;
 }
\ No newline at end of file