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yaml-frontmatter.js (2292B)

      1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
      2 // Distributed under an MIT license: http://codemirror.net/LICENSE
      3 
      4 (function (mod) {
      5   if (typeof exports == "object" && typeof module == "object") // CommonJS
      6     mod(require("../../lib/codemirror"), require("../yaml/yaml"))
      7   else if (typeof define == "function" && define.amd) // AMD
      8     define(["../../lib/codemirror", "../yaml/yaml"], mod)
      9   else // Plain browser env
     10     mod(CodeMirror)
     11 })(function (CodeMirror) {
     12 
     13   var START = 0, FRONTMATTER = 1, BODY = 2
     14 
     15   // a mixed mode for Markdown text with an optional YAML front matter
     16   CodeMirror.defineMode("yaml-frontmatter", function (config, parserConfig) {
     17     var yamlMode = CodeMirror.getMode(config, "yaml")
     18     var innerMode = CodeMirror.getMode(config, parserConfig && parserConfig.base || "gfm")
     19 
     20     function curMode(state) {
     21       return state.state == BODY ? innerMode : yamlMode
     22     }
     23 
     24     return {
     25       startState: function () {
     26         return {
     27           state: START,
     28           inner: CodeMirror.startState(yamlMode)
     29         }
     30       },
     31       copyState: function (state) {
     32         return {
     33           state: state.state,
     34           inner: CodeMirror.copyState(curMode(state), state.inner)
     35         }
     36       },
     37       token: function (stream, state) {
     38         if (state.state == START) {
     39           if (stream.match(/---/, false)) {
     40             state.state = FRONTMATTER
     41             return yamlMode.token(stream, state.inner)
     42           } else {
     43             state.state = BODY
     44             state.inner = CodeMirror.startState(innerMode)
     45             return innerMode.token(stream, state.inner)
     46           }
     47         } else if (state.state == FRONTMATTER) {
     48           var end = stream.sol() && stream.match(/---/, false)
     49           var style = yamlMode.token(stream, state.inner)
     50           if (end) {
     51             state.state = BODY
     52             state.inner = CodeMirror.startState(innerMode)
     53           }
     54           return style
     55         } else {
     56           return innerMode.token(stream, state.inner)
     57         }
     58       },
     59       innerMode: function (state) {
     60         return {mode: curMode(state), state: state.inner}
     61       },
     62       blankLine: function (state) {
     63         var mode = curMode(state)
     64         if (mode.blankLine) return mode.blankLine(state.inner)
     65       }
     66     }
     67   })
     68 });