feat(render): mutilple coverpage, close #315

Author: QingWei-Li

src/core/fetch/index.js

@@ -70,17 +70,31 @@ export function fetchMixin (proto) {
     const { coverpage } = this.config
     const query = this.route.query
     const root = getParentPath(this.route.path)
-    const path = this.router.getFile(root + coverpage)
 
-    if (this.route.path !== '/' || !coverpage) {
-      this._renderCover()
-      return
-    }
+    if (coverpage) {
+      let path = null
+      const routePath = this.route.path
+      if (typeof coverpage === 'string') {
+        if (routePath === '/') {
+          path = coverpage
+        }
+      } else if (Array.isArray(coverpage)) {
+        path = coverpage.indexOf(routePath) > -1 && '_coverpage.md'
+      } else {
+        const cover = coverpage[routePath]
+        path = cover === true ? '_coverpage.md' : cover
+      }
 
-    this.coverIsHTML = /\.html$/g.test(path)
-    get(path + stringifyQuery(query, ['id'])).then(text =>
-      this._renderCover(text)
-    )
+      if (path) {
+        path = this.router.getFile(root + path)
+        this.coverIsHTML = /\.html$/g.test(path)
+        get(path + stringifyQuery(query, ['id'])).then(text =>
+          this._renderCover(text)
+        )
+      } else {
+        this._renderCover()
+      }
+    }
   }
 
   proto.$fetch = function (cb = noop) {

src/core/render/tpl.js

@@ -57,7 +57,7 @@ export function cover () {
     `hsl(${Math.floor(Math.random() * 255) + SL}) 100%)`
 
   return (
-    `<section class="cover" style="background: ${bgc}">` +
+    `<section class="cover show" style="background: ${bgc}">` +
     '<div class="cover-main"></div>' +
     '<div class="mask"></div>' +
     '</section>'
@@ -74,7 +74,9 @@ export function tree (toc, tpl = '') {
   if (!toc || !toc.length) return ''
 
   toc.forEach(node => {
-    tpl += `<li><a class="section-link" href="${node.slug}">${node.title}</a></li>`
+    tpl += `<li><a class="section-link" href="${node.slug}">${
+      node.title
+    }</a></li>`
     if (node.children) {
       tpl += `<li><ul class="children">${tree(node.children)}</li></ul>`
     }