update v2

2018-10-04 19:07:24 +08:00 · 2018-10-04 19:07:24 +08:00 · 66b2369476
commit 66b2369476
parent e52ceb8b18
7 changed files with 10104 additions and 9530 deletions
--- a/2
+++ b/2
@ -1,4 +1,4 @@
-Copyright (c) 2014 Jack Wong
+Copyright (c) 2018 CRIMX

 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

--- a/README.md
+++ b/README.md
@ -9,6 +9,8 @@ A Hexo plugin that adds emoji support, using [Github Emojis API][ghemojis].

 Check out the [Emoji Cheat Sheet](http://www.webpagefx.com/tools/emoji-cheat-sheet/) for all the emojis it supports.

+V2 is not compatible with [V1](https://github.com/crimx/hexo-filter-github-emojis/tree/e52ceb8b18a7b06916b6cb0a887b218d49a7ab92). V1 replaces codepoints with `<img>` tags. While V2 makes the font transparent and displays emojis with `background-image`.
+
 ## Installation

 ``` bash
@ -23,63 +25,69 @@ You can configure this plugin in `_config.yml`. Default options:
 githubEmojis:
  enable: true
  className: github-emoji
-  unicode: false
+  inject: true
  styles:
-  localEmojis:
+  customEmojis:
 ```

-The filter will try to download the latest version of [Github Emojis][ghemojis] list. If the network is unavailable or too slow it will use the backup version.
-
- **className** - Image class name. For :sparkles: `:sparkles:` the filter will generate something like this:
+- **className** - Image class name. For example :sparkles: `:sparkles:` the filter will generate something like this:

  ```html
-  <img class="github-emoji" title=":sparkles:" alt=":sparkles:" src="https://assets-cdn.github.com/images/icons/emoji/unicode/2728.png" height="20" width="20">
+  <span class="github-emoji" style="background-image:url(https://assets-cdn.github.com/images/icons/emoji/unicode/2728.png?v8)" data-src="https://assets-cdn.github.com/images/icons/emoji/unicode/2728.png?v8">&#x2728;</span>
  ```

- **unicode** - If you set this option to true, the filter will generate something like this:
+- **inject** - If true, the filter will inject proper inline styles and a script to fallback when image loading fails. If you can modify script files and style files, you may turn this off and add them yourself.

  ```html
-  <span class="github-emoji" title=":sparkles:" data-src="https://assets-cdn.github.com/images/icons/emoji/unicode/2728.png">&#x2728;</span>
+  <span class="github-emoji" style="color:transparent;background:no-repeat url(...) center/contain" ...>
  ```
-  Then you can fallback to image with JavaScript. For example, with jQuery:
+  
+  A script tag will be appended, the className changes according to the options:

-  ```javascript
-    $('span.github-emoji').each(function (i, emoji) {
-      var $emoji = $(emoji)
-      var codepoint = $emoji.html()
-      $('<img height="20" width="20">')
-        .on('error', function () {
-          // image loading failed
-          $emoji.html(codepoint)
-        })
-        .prop('alt', $emoji.attr('title'))
-        .prop('src', $emoji.data('src'))
-        .appendTo($emoji.empty())
-    })
+  ```html
+    <script>
+      document.querySelectorAll('.github-emojis')
+        .forEach(el => {
+          if (!el.dataset.src) { return; }
+          const img = document.createElement('img');
+          img.style = 'display:none !important;';
+          img.src = el.dataset.src;
+          img.addEventListener('error', () => {
+            img.remove();
+            el.style.color = 'inherit';
+            el.style.backgroundImage = 'none';
+            el.style.background = 'none';
+          });
+          img.addEventListener('load', () => {
+            img.remove();
+          });
+          document.body.appendChild(img);
+        });
+    </script>
  ```

- **styles** - inline styles for the images. For example:
+- **styles** - inline styles. For example:

  ```yaml
  githubEmojis:
    styles:
-      display: inline
-      vertical-align: bottom
+      font-size: 2em
+      font-weight: bold
  ```

  outputs:

  ```html
-  <img class="github-emoji" style="display:inline;vertical-align:bottom" ...>
+  <span class="github-emoji" style="font-size:2em;font-weight:bold;background-image:url(...)" ...>
  ```

- **localEmojis** - You can specify your own list. An object or JSON string is valid. The filter will first check the `localEmojis` then fallback to the [Github Emojis][ghemojis] list.
+- **customEmojis** - You can specify your own list. An object or JSON string is valid. The filter will first check the `customEmojis` then fallback to the [Github Emojis][ghemojis] list.

  For example:

  ```yaml
  githubEmojis:
-    localEmojis:
+    customEmojis:
      arrow_left: https://path/to/arrow_left.png
      arrow_right: https://path/to/arrow_right.png
  ```
@ -88,7 +96,7 @@ The filter will try to download the latest version of [Github Emojis][ghemojis]

  ```yaml
  githubEmojis:
-    localEmojis:
+    customEmojis:
      man_juggling:
        src: https://path/to/man_juggling.png
        codepoints: ["1f939", "2642"]
--- a/emojis.json
+++ b/emojis.json
--- a/index.js
+++ b/index.js
@ -1,136 +1,138 @@
 'use strict'
 /* global hexo */

-var _ = require('lodash')
+const _ = require('lodash')
+const path = require('path')
+const fs = require('fs')
+const cheerio = require('cheerio')

 var options = _.assign({
  enable: true,
-  unicode: false,
+  inject: true,
  version: 'latest',
-  className: 'github-emoji'
+  className: 'github-emoji',
 }, hexo.config.githubEmojis)

 if (options.enable !== false) {
-  var path = require('path')
-  var url = require('url')
-  var fs = require('fs')
-  var request = require('request')
-  var randomUa = require('random-ua')
+  const emojis = _.assign(
+    {},
+    require('./emojis.json'),
+    loadCustomEmojis(options.customEmojis || options.localEmojis),
+  )

-  // fallback
-  var fallbackEmojis = require('./emojis.json')
+  fs.writeFile(
+    path.join(__dirname, 'emojis.json'),
+    JSON.stringify(emojis, null, '  '),
+    function (err) { err && console.warn(err) },
+  )

-  // load custom emojis
-  var localEmojis = options.localEmojis
-  // JSON string
-  if (_.isString(localEmojis)) {
-    try {
-      localEmojis = JSON.parse(localEmojis)
-      Object.keys(localEmojis).forEach(function (name) {
-        if (_.isString(localEmojis[name])) {
-          localEmojis[name] = {
-            src: localEmojis[name]
-          }
-        }
-      })
-    } catch (SyntaxError) {
-      localEmojis = {}
-      console.warn('filter-github-emojis: local emojis error')
+  hexo.extend.filter.register('after_post_render', data => {
+    if (!options.inject && data['no-emoji']) { return data }
+
+    const $ = cheerio.load(data.content)
+
+    if (options.inject) {
+      $('body').append(`<script>
+        document.querySelectorAll('.${options.className}')
+          .forEach(el => {
+            if (!el.dataset.src) { return; }
+            const img = document.createElement('img');
+            img.style = 'display:none !important;';
+            img.src = el.dataset.src;
+            img.addEventListener('error', () => {
+              img.remove();
+              el.style.color = 'inherit';
+              el.style.backgroundImage = 'none';
+              el.style.background = 'none';
+            });
+            img.addEventListener('load', () => {
+              img.remove();
+            });
+            document.body.appendChild(img);
+          });
+      </script>`)
    }
-  }
-  if (!_.isObject(localEmojis)) {
-    localEmojis = {}
-  }
-  Object.keys(localEmojis).forEach(function (name) {
-    var codepoints = localEmojis[name].codepoints
-    if (codepoints && !_.isArray(codepoints)) {
-      localEmojis[name].codepoints = codepoints.split(' ')
+
+    if (!data['no-emoji']) {
+      replaceColons($('body')[0], $, emojis)
    }
-  })

-  var emojis = _.assign(fallbackEmojis, localEmojis)
-
-  // get the latest github version
-  request({
-    url: 'https://api.github.com/emojis',
-    headers: {
-      'User-Agent': randomUa.generate()
-    },
-    json: true
-  }, function (error, response, body) {
-    if (!error && response.statusCode === 200) {
-      if (_.isObject(body)) {
-        var latestEmojis = {}
-        Object.keys(body).forEach(function (name) {
-          latestEmojis[name] = { src: body[name] }
-          if (body[name].indexOf('unicode') !== -1) {
-            // list of unicode code points
-            latestEmojis[name].codepoints = path.parse(url.parse(body[name]).pathname).name.split('-')
-          }
-        })
-        var githubEmojis = _.assign(fallbackEmojis, latestEmojis)
-        emojis = _.assign(githubEmojis, localEmojis)
-        // update local backup
-        fs.writeFile(
-          path.join(__dirname, 'emojis.json'),
-          JSON.stringify(githubEmojis, null, '\t'),
-          function (err) { err && console.warn(err) }
-        )
-      }
-    }
-  })
-
-  hexo.extend.filter.register('before_post_render', function (data) {
-    if (data['no-emoji']) { return data }
-    data.content = data.content.replace(/:(\w+):/ig, function (match, p1) {
-      if (emojis[p1]) {
-        return getRender(p1);
-      } else {
-        return match
-      }
-    })
+    data.content = $('body').html()
    return data
  })

-  hexo.extend.helper.register('github_emoji', function (name) {
-    return getRender(name)
-  })
+  hexo.extend.helper.register('github_emoji', name => renderEmoji(emojis, name))
+  hexo.extend.tag.register('github_emoji', args => renderEmoji(emojis, args[0]))
+}

-  hexo.extend.tag.register('github_emoji', function(args){
-    return getRender(args[0])
-  })
-
-  function getRender (emojiName) {
-    emojiName = String(emojiName)
-    if (!emojis[emojiName]) { return emojiName }
-
-    var styles = ''
-    if (_.isObject(options.styles)) {
-      // inline styles
-      styles = 'style="' +
-        Object.keys(options.styles)
-        .filter(function (k) { return _.isString(options.styles[k]) })
-        .map(function (k) { return k + ':' + options.styles[k] })
-        .join(';') +
-        '"'
+function replaceColons (node, $, emojis) {
+  node.children.forEach(child => {
+    if (child.type === 'text') {
+      const content = child.data.replace(
+        /:(\w+):/ig,
+        (match, p1) => emojis[p1] ? renderEmoji(emojis, p1) : match,
+      )
+      if (content !== child.data) {
+        $(child).replaceWith($.parseHTML(content))
+      }
+    } else if (child.type === 'tag') {
+      if (child.name !== 'pre' && child.name !== 'code') {
+        replaceColons(child, $, emojis)
+      }
    }
+  })
+}

-    var codepoints = emojis[emojiName].codepoints
-    if (options.unicode && codepoints) {
-      codepoints = codepoints.map(function (code) {
-        return '&#x' + code + ';'
-      }).join('')
-
-      return '<span class="' + options.className + '" ' +
-        styles +
-        ' title="' + emojiName +
-        '" data-src="' + emojis[emojiName].src +
-        '">' + codepoints + '</span>'
-    } else {
-      return '<img class="' + options.className + '" ' +
-        styles +
-        ' title="' + emojiName + '" alt="' + emojiName + '" src="' +
-        emojis[emojiName].src + '" height="20" width="20" />'
+function loadCustomEmojis (customEmojis) {
+  // JSON string
+  if (_.isString(customEmojis)) {
+    try {
+      customEmojis = JSON.parse(customEmojis)
+      Object.keys(customEmojis).forEach(name => {
+        if (_.isString(customEmojis[name])) {
+          customEmojis[name] = {
+            src: customEmojis[name],
+          }
+        }
+      })
+    } catch (err) {
+      customEmojis = {}
+      console.warn('hexo-filter-github-emojis: Custom emojis not valid. Skipped.')
    }
  }
+
+  if (!_.isObject(customEmojis)) {
+    customEmojis = {}
+  }
+
+  Object.values(customEmojis).forEach(emoji => {
+    if (emoji.codepoints && !_.isArray(emoji.codepoints)) {
+      emoji.codepoints = emoji.codepoints.split(' ')
+    }
+  })
+}
+
+function renderEmoji (emojis, name) {
+  if (!emojis[name]) { return name }
+
+  const styles = _.isObject(options.styles)
+    ? Object.keys(options.styles)
+      .filter(k => _.isString(options.styles[k]))
+      .map(k => k + ':' + options.styles[k])
+    : []
+
+  if (options.inject) {
+    styles.push(
+      'color: transparent',
+      `background:no-repeat url(${emojis[name].src}) center/contain`,
+    )
+  } else {
+    styles.push(`background-image:url(${emojis[name].src})`)
+  }
+
+  const codepoints = emojis[name].codepoints
+    ? emojis[name].codepoints.map(c => `&#x${c};`).join('')
+    : ' '
+
+  return `<span class="${options.className}" style="${styles.join(';')}" data-src="${emojis[name].src}">${codepoints}</span>`
 }
--- a/package-lock.json
+++ b/package-lock.json
@ -0,0 +1,513 @@
+{
+  "name": "hexo-filter-github-emojis",
+  "version": "2.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@types/node": {
+      "version": "10.11.4",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.11.4.tgz",
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+    },
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+      }
+    },
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+    },
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+      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
+      "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
+      "requires": {
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+        "extsprintf": "^1.2.0"
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+}
--- a/package.json
+++ b/package.json
@ -1,9 +1,12 @@
 {
  "name": "hexo-filter-github-emojis",
-  "version": "1.4.4",
+  "version": "2.0.0",
  "description": "A Hexo plugin that adds emojis support, using Github Emojis API",
  "main": "index",
  "repository": "crimx/hexo-filter-github-emojis",
+  "engines": {
+    "node": ">=8.0.0"
+  },
  "keywords": [
    "hexo",
    "hexo filter",
@ -16,6 +19,7 @@
  "author": "CRIMX <straybugs@gmail.com> (http://blog.crimx.com)",
  "license": "MIT",
  "dependencies": {
+    "cheerio": "^1.0.0-rc.2",
    "lodash": "^4.17.4",
    "random-ua": "0.0.6",
    "request": "^2.83.0"
--- a/update-emojis.js
+++ b/update-emojis.js
@ -0,0 +1,47 @@
+const _ = require('lodash')
+const path = require('path')
+const fs = require('fs')
+const request = require('request')
+const randomUa = require('random-ua')
+
+// get the latest github version
+request({
+  url: 'https://api.github.com/emojis',
+  headers: {
+    'User-Agent': randomUa.generate(),
+  },
+  json: true,
+}, function (error, response, json) {
+  if (response.statusCode === 304) { return }
+  if (error || !_.isObject(json)) {
+    console.error('Failded to download Github emojis.')
+    console.log(error, response, json)
+    return
+  }
+
+  const latestEmojis = Object.keys(json).reduce((emojis, name) => {
+    emojis[name] = { src: json[name] }
+
+    const match = /\/unicode\/(\S+)\./.exec(json[name])
+    if (match) {
+      emojis[name].codepoints = match[1].split('-')
+    }
+
+    return emojis
+  }, {})
+
+  const emojis = _.assign({}, require('./emojis.json'), latestEmojis)
+
+  // update local backup
+  fs.writeFile(
+    path.join(__dirname, 'emojis.json'),
+    JSON.stringify(emojis, null, '  '),
+    function (err) {
+      if (err) {
+        console.warn(err)
+      } else {
+        console.log(`Update ${Object.keys(emojis).length} emojis`)
+      }
+    },
+  )
+})