highlight code block for chart.js

extra_scripts/codemirror/mode/bfm/bfm.js

@@ -0,0 +1,107 @@
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../codemirror/lib/codemirror"), require("../codemirror/mode/gfm/gfm"), require("../codemirror/mode/yaml-frontmatter/yaml-frontmatter"))
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../codemirror/lib/codemirror", "../codemirror/mode/gfm/gfm", "../codemirror/mode/yaml-frontmatter/yaml-frontmatter"], mod)
+  else // Plain browser env
+    mod(CodeMirror)
+})(function(CodeMirror) {
+  'use strict'
+
+  const fencedCodeRE = /^(~~~+|```+)[ \t]*([\w+#-]+)?(?:\(((?:\s*\w[-\w]*(?:=(?:'(?:.*?[^\\])?'|"(?:.*?[^\\])?"|(?:[^'"][^\s]*)))?)*)\))?(?::([^:]*)(?::(\d+))?)?\s*$/
+
+  function getMode(name, params, config, cm) {
+    if (!name) {
+      return null
+    }
+
+    const parameters = {}
+    if (params) {
+      const regex = /(\w[-\w]*)(?:=(?:'(.*?[^\\])?'|"(.*?[^\\])?"|([^'"][^\s]*)))?/g
+
+      let match
+      while ((match = regex.exec(params))) {
+        parameters[match[1]] = match[2] || match[3] || match[4] || null
+      }
+    }
+
+    if (name === 'chart') {
+      name = parameters.hasOwnProperty('yaml') ? 'yaml' : 'json'
+    }
+
+    const found = CodeMirror.findModeByName(name)
+    if (!found) {
+      return null
+    }
+
+    if (CodeMirror.modes.hasOwnProperty(found.mode)) {
+      const mode = CodeMirror.getMode(config, found.mode)
+
+      return mode.name === 'null' ? null : mode
+    } else {
+      CodeMirror.requireMode(found.mode, () => {
+        cm.setOption('mode', cm.getOption('mode'))
+      })
+    }
+  }
+
+  CodeMirror.defineMode('bfm', function (config, baseConfig) {
+    var bfmOverlay = {
+      startState: function() {
+        return {
+          fencedEndRE: null
+        }
+      },
+      copyState: function(s) {
+        return {
+          localMode: s.localMode,
+          localState: s.localMode ? CodeMirror.copyState(s.localMode, s.localState) : null,
+
+          fencedEndRE: s.fencedEndRE
+        }
+      },
+      token: function(stream, state) {
+        state.combineTokens = false
+
+        if (state.fencedEndRE && stream.match(state.fencedEndRE)) {
+          state.fencedEndRE = null
+          state.localMode = null
+          state.localState = null
+
+          return null
+        }
+
+        if (state.localMode) {
+          return state.localMode.token(stream, state.localState) || ''
+        }
+
+        const match = stream.match(fencedCodeRE, true)
+        if (match) {
+          state.fencedEndRE = new RegExp(match[1] + '+ *$')
+
+          state.localMode = getMode(match[2], match[3], config, stream.lineOracle.doc.cm)
+          if (state.localMode) {
+            state.localState = CodeMirror.startState(state.localMode)
+          }
+
+          return null
+        }
+
+        state.combineTokens = true
+        stream.next()
+        return null
+      },
+    }
+
+    baseConfig.name = 'yaml-frontmatter'
+    return CodeMirror.overlayMode(CodeMirror.getMode(config, baseConfig), bfmOverlay)
+  }, 'yaml-frontmatter')
+
+  CodeMirror.defineMIME('text/x-bfm', 'bfm')
+
+  CodeMirror.modeInfo.push({
+    name: "Boost Flavored Markdown",
+    mime: "text/x-bfm",
+    mode: "bfm"
+  })
+})