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hexo-filter-github-emojis
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update v2

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CRIMX 2018-10-04 19:07:24 +08:00
parent e52ceb8b18
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2
LICENSE
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@ -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: 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:

66
README.md
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@ -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. 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 ## Installation
``` bash ``` bash
@ -23,63 +25,69 @@ You can configure this plugin in `_config.yml`. Default options:
githubEmojis: githubEmojis:
enable: true enable: true
className: github-emoji className: github-emoji
unicode: false inject: true
styles: 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 example :sparkles: `:sparkles:` the filter will generate something like this:
- **className** - Image class name. For :sparkles: `:sparkles:` the filter will generate something like this:
```html ```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 ```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 ```html
$('span.github-emoji').each(function (i, emoji) { <script>
var $emoji = $(emoji) document.querySelectorAll('.github-emojis')
var codepoint = $emoji.html() .forEach(el => {
$('<img height="20" width="20">') if (!el.dataset.src) { return; }
.on('error', function () { const img = document.createElement('img');
// image loading failed img.style = 'display:none !important;';
$emoji.html(codepoint) img.src = el.dataset.src;
}) img.addEventListener('error', () => {
.prop('alt', $emoji.attr('title')) img.remove();
.prop('src', $emoji.data('src')) el.style.color = 'inherit';
.appendTo($emoji.empty()) 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 ```yaml
githubEmojis: githubEmojis:
styles: styles:
display: inline font-size: 2em
vertical-align: bottom font-weight: bold
``` ```
outputs: outputs:
```html ```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: For example:
```yaml ```yaml
githubEmojis: githubEmojis:
localEmojis: customEmojis:
arrow_left: https://path/to/arrow_left.png arrow_left: https://path/to/arrow_left.png
arrow_right: https://path/to/arrow_right.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 ```yaml
githubEmojis: githubEmojis:
localEmojis: customEmojis:
man_juggling: man_juggling:
src: https://path/to/man_juggling.png src: https://path/to/man_juggling.png
codepoints: ["1f939", "2642"] codepoints: ["1f939", "2642"]

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emojis.json
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226
index.js
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@ -1,136 +1,138 @@
'use strict' 'use strict'
/* global hexo */ /* global hexo */
var _ = require('lodash') const _ = require('lodash')
const path = require('path')
const fs = require('fs')
const cheerio = require('cheerio')
var options = _.assign({ var options = _.assign({
enable: true, enable: true,
unicode: false, inject: true,
version: 'latest', version: 'latest',
className: 'github-emoji' className: 'github-emoji',
}, hexo.config.githubEmojis) }, hexo.config.githubEmojis)
if (options.enable !== false) { if (options.enable !== false) {
var path = require('path') const emojis = _.assign(
var url = require('url') {},
var fs = require('fs') require('./emojis.json'),
var request = require('request') loadCustomEmojis(options.customEmojis || options.localEmojis),
var randomUa = require('random-ua') )
// fallback fs.writeFile(
var fallbackEmojis = require('./emojis.json') path.join(__dirname, 'emojis.json'),
JSON.stringify(emojis, null, ' '),
function (err) { err && console.warn(err) },
)
// load custom emojis hexo.extend.filter.register('after_post_render', data => {
var localEmojis = options.localEmojis if (!options.inject && data['no-emoji']) { return data }
// JSON string
if (_.isString(localEmojis)) { const $ = cheerio.load(data.content)
try {
localEmojis = JSON.parse(localEmojis) if (options.inject) {
Object.keys(localEmojis).forEach(function (name) { $('body').append(`<script>
if (_.isString(localEmojis[name])) { document.querySelectorAll('.${options.className}')
localEmojis[name] = { .forEach(el => {
src: localEmojis[name] if (!el.dataset.src) { return; }
} const img = document.createElement('img');
} img.style = 'display:none !important;';
}) img.src = el.dataset.src;
} catch (SyntaxError) { img.addEventListener('error', () => {
localEmojis = {} img.remove();
console.warn('filter-github-emojis: local emojis error') 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)) { if (!data['no-emoji']) {
localEmojis = {} replaceColons($('body')[0], $, emojis)
}
Object.keys(localEmojis).forEach(function (name) {
var codepoints = localEmojis[name].codepoints
if (codepoints && !_.isArray(codepoints)) {
localEmojis[name].codepoints = codepoints.split(' ')
} }
})
var emojis = _.assign(fallbackEmojis, localEmojis) data.content = $('body').html()
// 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
}
})
return data return data
}) })
hexo.extend.helper.register('github_emoji', function (name) { hexo.extend.helper.register('github_emoji', name => renderEmoji(emojis, name))
return getRender(name) hexo.extend.tag.register('github_emoji', args => renderEmoji(emojis, args[0]))
}) }
hexo.extend.tag.register('github_emoji', function(args){ function replaceColons (node, $, emojis) {
return getRender(args[0]) node.children.forEach(child => {
}) if (child.type === 'text') {
const content = child.data.replace(
function getRender (emojiName) { /:(\w+):/ig,
emojiName = String(emojiName) (match, p1) => emojis[p1] ? renderEmoji(emojis, p1) : match,
if (!emojis[emojiName]) { return emojiName } )
if (content !== child.data) {
var styles = '' $(child).replaceWith($.parseHTML(content))
if (_.isObject(options.styles)) { }
// inline styles } else if (child.type === 'tag') {
styles = 'style="' + if (child.name !== 'pre' && child.name !== 'code') {
Object.keys(options.styles) replaceColons(child, $, emojis)
.filter(function (k) { return _.isString(options.styles[k]) }) }
.map(function (k) { return k + ':' + options.styles[k] })
.join(';') +
'"'
} }
})
}
var codepoints = emojis[emojiName].codepoints function loadCustomEmojis (customEmojis) {
if (options.unicode && codepoints) { // JSON string
codepoints = codepoints.map(function (code) { if (_.isString(customEmojis)) {
return '&#x' + code + ';' try {
}).join('') customEmojis = JSON.parse(customEmojis)
Object.keys(customEmojis).forEach(name => {
return '<span class="' + options.className + '" ' + if (_.isString(customEmojis[name])) {
styles + customEmojis[name] = {
' title="' + emojiName + src: customEmojis[name],
'" data-src="' + emojis[emojiName].src + }
'">' + codepoints + '</span>' }
} else { })
return '<img class="' + options.className + '" ' + } catch (err) {
styles + customEmojis = {}
' title="' + emojiName + '" alt="' + emojiName + '" src="' + console.warn('hexo-filter-github-emojis: Custom emojis not valid. Skipped.')
emojis[emojiName].src + '" height="20" width="20" />'
} }
} }
if (!_.isObject(customEmojis)) {
customEmojis = {}
}
Object.values(customEmojis).forEach(emoji => {
if (emoji.codepoints && !_.isArray(emoji.codepoints)) {
emoji.codepoints = emoji.codepoints.split(' ')
}
})
}
function renderEmoji (emojis, name) {
if (!emojis[name]) { return name }
const styles = _.isObject(options.styles)
? Object.keys(options.styles)
.filter(k => _.isString(options.styles[k]))
.map(k => k + ':' + options.styles[k])
: []
if (options.inject) {
styles.push(
'color: transparent',
`background:no-repeat url(${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>`
} }

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package-lock.json generated Normal file
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@ -0,0 +1,513 @@
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}

6
package.json
View File

@ -1,9 +1,12 @@
{ {
"name": "hexo-filter-github-emojis", "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", "description": "A Hexo plugin that adds emojis support, using Github Emojis API",
"main": "index", "main": "index",
"repository": "crimx/hexo-filter-github-emojis", "repository": "crimx/hexo-filter-github-emojis",
"engines": {
"node": ">=8.0.0"
},
"keywords": [ "keywords": [
"hexo", "hexo",
"hexo filter", "hexo filter",
@ -16,6 +19,7 @@
"author": "CRIMX <straybugs@gmail.com> (http://blog.crimx.com)", "author": "CRIMX <straybugs@gmail.com> (http://blog.crimx.com)",
"license": "MIT", "license": "MIT",
"dependencies": { "dependencies": {
"cheerio": "^1.0.0-rc.2",
"lodash": "^4.17.4", "lodash": "^4.17.4",
"random-ua": "0.0.6", "random-ua": "0.0.6",
"request": "^2.83.0" "request": "^2.83.0"

47
update-emojis.js Normal file
View File

@ -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`)
}
},
)
})