init

components/mp-html/highlight/index.js

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+/**
+ * @fileoverview highlight 插件
+ * Include prismjs (https://prismjs.com)
+ */
+import prism from './prism.min'
+import config from './config'
+import Parser from '../parser'
+
+function Highlight (vm) {
+  this.vm = vm
+}
+
+Highlight.prototype.onParse = function (node, vm) {
+  if (node.name === 'pre') {
+    let i
+    for (i = node.children.length; i--;) {
+      if (node.children[i].name === 'code') break
+    }
+    if (i === -1) return
+    const code = node.children[i]
+    let className = code.attrs.class || ''
+    i = className.indexOf('language-')
+    if (i === -1) {
+      className = node.attrs.class || ''
+      i = className.indexOf('language-')
+    }
+    if (i === -1) {
+      className = 'language-text'
+      i = className.indexOf('language-')
+    }
+    i += 9
+    let j
+    for (j = i; j < className.length; j++) {
+      if (className[j] === ' ') break
+    }
+    const lang = className.substring(i, j)
+    if (code.children.length) {
+      const text = this.vm.getText(code.children).replace(/&amp;/g, '&')
+      if (!text) return
+      if (node.c) {
+        node.c = undefined
+      }
+      if (prism.languages[lang]) {
+        code.children = (new Parser(this.vm).parse(
+          // 加一层 pre 保留空白符
+          '<pre>' + prism.highlight(text, prism.languages[lang], lang).replace(/token /g, 'hl-') + '</pre>'))[0].children
+      }
+      node.attrs.class = 'hl-pre'
+      code.attrs.class = 'hl-code'
+      if (config.showLanguageName) {
+        node.children.push({
+          name: 'div',
+          attrs: {
+            class: 'hl-language',
+            style: 'user-select:none'
+          },
+          children: [{
+            type: 'text',
+            text: lang
+          }]
+        })
+      }
+      if (config.copyByLongPress) {
+        node.attrs.style += (node.attrs.style || '') + ';user-select:none'
+        node.attrs['data-content'] = text
+        vm.expose()
+      }
+      if (config.showLineNumber) {
+        const line = text.split('\n').length; const children = []
+        for (let k = line; k--;) {
+          children.push({
+            name: 'span',
+            attrs: {
+              class: 'span'
+            }
+          })
+        }
+        node.children.push({
+          name: 'span',
+          attrs: {
+            class: 'line-numbers-rows'
+          },
+          children
+        })
+      }
+    }
+  }
+}
+
+export default Highlight