更新

themes/butterfly/scripts/helpers/page.js

@@ -0,0 +1,72 @@
+/**
+ * Butterfly
+ * @example
+ *  page_description()
+ *  cloudTags(source, minfontsize, maxfontsize, limit)
+ */
+
+'use strict'
+
+const { stripHTML, escapeHTML, prettyUrls } = require('hexo-util')
+const crypto = require('crypto')
+
+hexo.extend.helper.register('page_description', function () {
+  const { config, page } = this
+  let description = page.description || page.content || page.title || config.description
+
+  if (description) {
+    description = escapeHTML(stripHTML(description).substring(0, 200)
+      .trim()
+    ).replace(/\n/g, ' ')
+    return description
+  }
+})
+
+hexo.extend.helper.register('cloudTags', function (options = {}) {
+  const env = this
+  let source = options.source
+  const minfontsize = options.minfontsize
+  const maxfontsize = options.maxfontsize
+  const limit = options.limit
+  const unit = options.unit || 'px'
+
+  let result = ''
+  if (limit > 0) {
+    source = source.limit(limit)
+  }
+
+  const sizes = []
+  source.sort('length').forEach(tag => {
+    const { length } = tag
+    if (sizes.includes(length)) return
+    sizes.push(length)
+  })
+
+  const length = sizes.length - 1
+  source.forEach(tag => {
+    const ratio = length ? sizes.indexOf(tag.length) / length : 0
+    const size = minfontsize + ((maxfontsize - minfontsize) * ratio)
+    let style = `font-size: ${parseFloat(size.toFixed(2))}${unit};`
+    const color = 'rgb(' + Math.floor(Math.random() * 201) + ', ' + Math.floor(Math.random() * 201) + ', ' + Math.floor(Math.random() * 201) + ')' // 0,0,0 -> 200,200,200
+    style += ` color: ${color}`
+    result += `<a href="${env.url_for(tag.path)}" style="${style}">${tag.name}</a>`
+  })
+  return result
+})
+
+hexo.extend.helper.register('urlNoIndex', function () {
+  return prettyUrls(this.url, { trailing_index: false, trailing_html: false })
+})
+
+hexo.extend.helper.register('md5', function (path) {
+  return crypto.createHash('md5').update(decodeURI(this.url_for(path))).digest('hex')
+})
+
+hexo.extend.helper.register('injectHtml', function (data) {
+  let result = ''
+  if (!data) return ''
+  for (let i = 0; i < data.length; i++) {
+    result += data[i]
+  }
+  return result
+})