Lazy load dicts, support cdn, config webpack

Signed-off-by: Yukai Huang <yukaihuangtw@gmail.com>

lib/status/index.js

@@ -24,7 +24,8 @@ exports.getConfig = (req, res) => {
     DROPBOX_APP_KEY: config.dropbox.appKey,
     allowedUploadMimeTypes: config.allowedUploadMimeTypes,
     defaultUseHardbreak: config.defaultUseHardbreak,
-    linkifyHeaderStyle: config.linkifyHeaderStyle
+    linkifyHeaderStyle: config.linkifyHeaderStyle,
+    useCDN: config.useCDN
   }
   res.set({
     'Cache-Control': 'private', // only cache by client

package.json

@@ -165,6 +165,9 @@
     "babel-runtime": "~6.26.0",
     "copy-webpack-plugin": "~4.5.2",
     "css-loader": "~1.0.0",
+    "dictionary-de": "^2.0.3",
+    "dictionary-de-at": "^2.0.3",
+    "dictionary-de-ch": "^2.0.3",
     "doctoc": "~1.4.0",
     "ejs-loader": "~0.3.1",
     "exports-loader": "~0.7.0",

public/js/lib/common/constant.ejs

@@ -11,3 +11,5 @@ window.defaultUseHardbreak = <%- defaultUseHardbreak %>
 window.linkifyHeaderStyle = '<%- linkifyHeaderStyle %>'
 
 window.DROPBOX_APP_KEY = '<%- DROPBOX_APP_KEY %>'
+
+window.USE_CDN = <%- useCDN %>

public/js/lib/editor/index.js

@@ -7,7 +7,7 @@ import config from './config'
 import statusBarTemplate from './statusbar.html'
 import toolBarTemplate from './toolbar.html'
 import './markdown-lint'
-import CodeMirrorSpellChecker, { supportLanguages } from './spellcheck'
+import CodeMirrorSpellChecker, { supportLanguages, supportLanguageCodes } from './spellcheck'
 import { initTableEditor } from './table-editor'
 import { availableThemes } from './constants'
 
@@ -548,7 +548,7 @@ export default class Editor {
       return
     }
 
-    if (!supportLanguages.includes(lang)) {
+    if (!supportLanguageCodes.includes(lang)) {
       return
     }
 
@@ -558,7 +558,21 @@ export default class Editor {
     this.spellchecker.setDictLang(lang)
   }
 
+  getExistingSpellcheckLang () {
+    const cookieSpellcheck = Cookies.get('spellcheck')
+
+    if (cookieSpellcheck) {
+      return cookieSpellcheck === 'false' ? undefined : cookieSpellcheck
+    } else {
+      return undefined
+    }
+  }
+
   setSpellcheck () {
+    this.statusSpellcheck.find('ul.dropdown-menu').append(supportLanguages.map(lang => {
+      return $(`<li value="${lang.value}"><a>${lang.name}</a></li>`)
+    }))
+
     const cookieSpellcheck = Cookies.get('spellcheck')
     if (cookieSpellcheck) {
       let mode = null
@@ -567,7 +581,7 @@ export default class Editor {
         mode = defaultEditorMode
       } else {
         mode = 'spell-checker'
-        if (supportLanguages.includes(cookieSpellcheck)) {
+        if (supportLanguageCodes.includes(cookieSpellcheck)) {
           lang = cookieSpellcheck
         }
       }
@@ -740,7 +754,7 @@ export default class Editor {
       placeholder: "← Start by entering a title here\n===\nVisit /features if you don't know what to do.\nHappy hacking :)"
     })
 
-    this.spellchecker = new CodeMirrorSpellChecker(CodeMirror)
+    this.spellchecker = new CodeMirrorSpellChecker(CodeMirror, this.getExistingSpellcheckLang())
     this.tableEditor = initTableEditor(this.editor)
 
     return this.editor

public/js/lib/editor/spellcheck.js

@@ -5,26 +5,58 @@
 import Typo from 'typo-js'
 import { serverurl } from '../config'
 
-const dictionaryDownloadUrls = {
-  en_US: {
-    aff: `${serverurl}/vendor/codemirror-spell-checker/en_US.aff`,
-    dic: `${serverurl}/vendor/codemirror-spell-checker/en_US.dic`
+export const supportLanguages = [
+  {
+    name: 'English (United States)',
+    value: 'en_US',
+    aff: {
+      url: `${serverurl}/vendor/codemirror-spell-checker/en_US.aff`,
+      cdnUrl: `${serverurl}/vendor/codemirror-spell-checker/en_US.aff`
+    },
+    dic: {
+      url: `${serverurl}/vendor/codemirror-spell-checker/en_US.dic`,
+      cdnUrl: `${serverurl}/vendor/codemirror-spell-checker/en_US.dic`
+    }
   },
-  de: {
-    aff: 'https://rawcdn.githack.com/wooorm/dictionaries/143091715eebbbdfa0e8936e117f9182514eebe6/dictionaries/de/index.aff',
-    dic: 'https://rawcdn.githack.com/wooorm/dictionaries/143091715eebbbdfa0e8936e117f9182514eebe6/dictionaries/de/index.dic'
+  {
+    name: 'German',
+    value: 'de',
+    aff: {
+      url: `${serverurl}/build/dictionary-de/index.aff`,
+      cdnUrl: `https://cdn.jsdelivr.net/npm/dictionary-de@2.0.3/index.aff`
+    },
+    dic: {
+      url: `${serverurl}/build/dictionary-de/index.dic`,
+      cdnUrl: `https://cdn.jsdelivr.net/npm/dictionary-de@2.0.3/index.dic`
+    }
   },
-  de_AT: {
-    aff: 'https://rawcdn.githack.com/wooorm/dictionaries/143091715eebbbdfa0e8936e117f9182514eebe6/dictionaries/de-AT/index.aff',
-    dic: 'https://rawcdn.githack.com/wooorm/dictionaries/143091715eebbbdfa0e8936e117f9182514eebe6/dictionaries/de-AT/index.dic'
+  {
+    name: 'German (Austria)',
+    value: 'de_AT',
+    aff: {
+      url: `${serverurl}/build/dictionary-de-at/index.aff`,
+      cdnUrl: `https://cdn.jsdelivr.net/npm/dictionary-de-at@2.0.3/index.aff`
+    },
+    dic: {
+      url: `${serverurl}/build/dictionary-de-at/index.dic`,
+      cdnUrl: `https://cdn.jsdelivr.net/npm/dictionary-de-at@2.0.3/index.dic`
+    }
   },
-  de_CH: {
-    aff: 'https://rawcdn.githack.com/wooorm/dictionaries/143091715eebbbdfa0e8936e117f9182514eebe6/dictionaries/de-CH/index.aff',
-    dic: 'https://rawcdn.githack.com/wooorm/dictionaries/143091715eebbbdfa0e8936e117f9182514eebe6/dictionaries/de-CH/index.dic'
+  {
+    name: 'German (Switzerland)',
+    value: 'de_CH',
+    aff: {
+      url: `${serverurl}/build/dictionary-de-ch/index.aff`,
+      cdnUrl: `https://cdn.jsdelivr.net/npm/dictionary-de-ch@2.0.3/index.aff`
+    },
+    dic: {
+      url: `${serverurl}/build/dictionary-de-ch/index.dic`,
+      cdnUrl: `https://cdn.jsdelivr.net/npm/dictionary-de-ch@2.0.3/index.dic`
+    }
   }
-}
+]
 
-export const supportLanguages = Object.keys(dictionaryDownloadUrls)
+export const supportLanguageCodes = supportLanguages.map(lang => lang.value)
 
 function request (url) {
   return new Promise(resolve => {
@@ -59,20 +91,51 @@ function createTypo (lang, affData, dicData) {
 
 const typoMap = new Map()
 
+let fetching = false
 async function findOrCreateTypoInstance (lang) {
+  if (!lang) {
+    return
+  }
+
   // find existing typo instance
   let typo = typoMap.get(lang)
   if (typo) {
     return typo
   }
 
-  const [affData, dicData] = await mapSeriesP([
-    dictionaryDownloadUrls[lang].aff,
-    dictionaryDownloadUrls[lang].dic
-  ], request)
+  let dict = supportLanguages.find(l => l.value === lang)
 
-  typo = createTypo(lang, affData, dicData)
-  typoMap.set(lang, typo)
+  if (!dict) {
+    console.error(`Dictionary not found for "${lang}"\n Fallback to default English spellcheck`)
+    dict = supportLanguages[0]
+  }
+
+  let affUrl
+  let dicUrl
+  if (window.USE_CDN) {
+    affUrl = dict.aff.cdnUrl
+    dicUrl = dict.dic.cdnUrl
+  } else {
+    affUrl = dict.aff.url
+    dicUrl = dict.dic.url
+  }
+
+  if (fetching) {
+    return typo
+  }
+
+  try {
+    fetching = true
+
+    const [affData, dicData] = await mapSeriesP([affUrl, dicUrl], request)
+
+    typo = createTypo(lang, affData, dicData)
+    typoMap.set(lang, typo)
+  } catch (err) {
+    console.error(err)
+  } finally {
+    fetching = false
+  }
 
   return typo
 }
@@ -82,7 +145,7 @@ class CodeMirrorSpellChecker {
    * @param {CodeMirror} cm
    * @param {string} lang
    */
-  constructor (cm, lang = 'en_US') {
+  constructor (cm, lang) {
     // Verify
     if (typeof cm !== 'function' || typeof cm.defineMode !== 'function') {
       console.log(

public/js/lib/editor/statusbar.html

@@ -45,10 +45,6 @@
             </a>
             <ul class="dropdown-menu" aria-labelledby="themeLabel">
                 <li value="disabled"><a>Disabled</a></li>
-                <li value="en_US"><a>English (United States)</a></li>
-                <li value="de"><a>German</a></li>
-                <li value="de_AT"><a>German (Austria)</a></li>
-                <li value="de_CH"><a>German (Switzerland)</a></li>
             </ul>
         </div>
         <div class="status-linter">

webpack.common.js

@@ -165,7 +165,22 @@ module.exports = {
         context: path.join(__dirname, 'node_modules/reveal.js'),
         from: 'plugin',
         to: 'reveal.js/plugin'
-      }
+      },
+      {
+        context: path.join(__dirname, 'node_modules/dictionary-de'),
+        from: '*',
+        to: 'dictionary-de/'
+      },
+      {
+        context: path.join(__dirname, 'node_modules/dictionary-de-at'),
+        from: '*',
+        to: 'dictionary-de-at/'
+      },
+      {
+        context: path.join(__dirname, 'node_modules/dictionary-de-ch'),
+        from: '*',
+        to: 'dictionary-de-ch/'
+      },
     ]),
     new MiniCssExtractPlugin()
   ],

yarn.lock

@@ -4333,6 +4333,21 @@ diagnostics@^1.1.1:
     enabled "1.0.x"
     kuler "1.0.x"
 
+dictionary-de-at@^2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/dictionary-de-at/-/dictionary-de-at-2.0.3.tgz#78f31d0cd8ca7c7d5ba48fdefb7a7bd3f05e11ca"
+  integrity sha512-unbay9PPM75yZ0RPnqSD/PADpZj7/vPDVeau2jTsVPFKwhoZGJTBVLD2wCaIkhS6tyVsNOboo1VYjzOCOit2ww==
+
+dictionary-de-ch@^2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/dictionary-de-ch/-/dictionary-de-ch-2.0.3.tgz#1727413a1eb35eb78e7fe15b5b7a742fd650f0c3"
+  integrity sha512-+eqpz5j8WONSzxmc4avCN4XX/6q5+J6JfWz2AaluZIOVNgXPxUjXBhKS73+nRhM3nE1pGeRMqkyZevTQWgYTTw==
+
+dictionary-de@^2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/dictionary-de/-/dictionary-de-2.0.3.tgz#df50c749fddbff601f5bd044aef4622a365a15b2"
+  integrity sha512-fbNcCIjDrdNvu7DzMzkOY77vIaGqiDQqf9vtwGud1fcSxVWwX6EdtHcosmgG7AA10u3QgDVkymMaX9mr3elwRw==
+
 diff-match-patch@^1.0.0:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/diff-match-patch/-/diff-match-patch-1.0.4.tgz#6ac4b55237463761c4daf0dc603eb869124744b1"