Ebook and comic reader #14

components/readers/MobiReader.vue

@@ -0,0 +1,120 @@
+<template>
+  <div class="ebook-viewer w-full h-full">
+    <div class="absolute overflow-y-scroll left-0 right-0 w-full max-w-screen m-auto z-10 border border-black border-opacity-20 shadow-md bg-white">
+      <iframe title="html-viewer" class="w-screen"> Loading </iframe>
+    </div>
+    <div class="fixed bottom-0 left-0 h-8 w-full bg-bg px-2 flex items-center z-20">
+      <p class="text-xs">mobi</p>
+      <div class="flex-grow" />
+    </div>
+  </div>
+</template>
+
+<script>
+import MobiParser from '@/assets/ebooks/mobi.js'
+import HtmlParser from '@/assets/ebooks/htmlParser.js'
+import defaultCss from '@/assets/ebooks/basic.js'
+
+export default {
+  props: {
+    url: String
+  },
+  data() {
+    return {}
+  },
+  computed: {},
+  methods: {
+    addHtmlCss() {
+      let iframe = document.getElementsByTagName('iframe')[0]
+      if (!iframe) return
+      let doc = iframe.contentDocument
+      if (!doc) return
+      let style = doc.createElement('style')
+      style.id = 'default-style'
+      style.textContent = defaultCss
+      doc.head.appendChild(style)
+    },
+    handleIFrameHeight(iFrame) {
+      const isElement = (obj) => !!(obj && obj.nodeType === 1)
+
+      var body = iFrame.contentWindow.document.body,
+        html = iFrame.contentWindow.document.documentElement
+      iFrame.height = Math.max(body.scrollHeight, body.offsetHeight, html.clientHeight, html.scrollHeight, html.offsetHeight) * 2
+
+      setTimeout(() => {
+        let lastchild = body.lastElementChild
+        let lastEle = body.lastChild
+
+        let itemAs = body.querySelectorAll('a')
+        let itemPs = body.querySelectorAll('p')
+        let lastItemA = itemAs[itemAs.length - 1]
+        let lastItemP = itemPs[itemPs.length - 1]
+        let lastItem
+        if (isElement(lastItemA) && isElement(lastItemP)) {
+          if (lastItemA.clientHeight + lastItemA.offsetTop > lastItemP.clientHeight + lastItemP.offsetTop) {
+            lastItem = lastItemA
+          } else {
+            lastItem = lastItemP
+          }
+        }
+
+        if (!lastchild && !lastItem && !lastEle) return
+        if (lastEle.nodeType === 3 && !lastchild && !lastItem) return
+
+        let nodeHeight = 0
+        if (lastEle.nodeType === 3 && document.createRange) {
+          let range = document.createRange()
+          range.selectNodeContents(lastEle)
+          if (range.getBoundingClientRect) {
+            let rect = range.getBoundingClientRect()
+            if (rect) {
+              nodeHeight = rect.bottom - rect.top
+            }
+          }
+        }
+        var lastChildHeight = isElement(lastchild) ? lastchild.clientHeight + lastchild.offsetTop : 0
+        var lastEleHeight = isElement(lastEle) ? lastEle.clientHeight + lastEle.offsetTop : 0
+        var lastItemHeight = isElement(lastItem) ? lastItem.clientHeight + lastItem.offsetTop : 0
+        iFrame.height = Math.max(lastChildHeight, lastEleHeight, lastItemHeight) + 100 + nodeHeight
+      }, 500)
+    },
+    async initMobi() {
+      // Fetch mobi file as blob
+      var buff = await this.$axios.$get(this.url, {
+        responseType: 'blob'
+      })
+      var reader = new FileReader()
+      reader.onload = async (event) => {
+        var file_content = event.target.result
+
+        let mobiFile = new MobiParser(file_content)
+
+        let content = await mobiFile.render()
+        let htmlParser = new HtmlParser(new DOMParser().parseFromString(content.outerHTML, 'text/html'))
+        var anchoredDoc = htmlParser.getAnchoredDoc()
+
+        let iFrame = document.getElementsByTagName('iframe')[0]
+        iFrame.contentDocument.body.innerHTML = anchoredDoc.documentElement.outerHTML
+
+        // Add css
+        let style = iFrame.contentDocument.createElement('style')
+        style.id = 'default-style'
+        style.textContent = defaultCss
+        iFrame.contentDocument.head.appendChild(style)
+
+        this.handleIFrameHeight(iFrame)
+      }
+      reader.readAsArrayBuffer(buff)
+    }
+  },
+  mounted() {
+    this.initMobi()
+  }
+}
+</script>
+
+<style>
+.ebook-viewer {
+  height: calc(100% - 32px);
+}
+</style>