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1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
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2 // Distributed under an MIT license: https://codemirror.net/5/LICENSE
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3
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4 (function (mod) {
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5 if (typeof exports == "object" && typeof module == "object") // CommonJS
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6 mod(require("../../lib/codemirror"), require("../yaml/yaml"))
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7 else if (typeof define == "function" && define.amd) // AMD
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8 define(["../../lib/codemirror", "../yaml/yaml"], mod)
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9 else // Plain browser env
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10 mod(CodeMirror)
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11 })(function (CodeMirror) {
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12
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13 var START = 0, FRONTMATTER = 1, BODY = 2
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14
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15 // a mixed mode for Markdown text with an optional YAML front matter
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16 CodeMirror.defineMode("yaml-frontmatter", function (config, parserConfig) {
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17 var yamlMode = CodeMirror.getMode(config, "yaml")
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18 var innerMode = CodeMirror.getMode(config, parserConfig && parserConfig.base || "gfm")
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19
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20 function localMode(state) {
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21 return state.state == FRONTMATTER ? {mode: yamlMode, state: state.yaml} : {mode: innerMode, state: state.inner}
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22 }
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23
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24 return {
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25 startState: function () {
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26 return {
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27 state: START,
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28 yaml: null,
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29 inner: CodeMirror.startState(innerMode)
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30 }
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31 },
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32 copyState: function (state) {
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33 return {
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34 state: state.state,
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35 yaml: state.yaml && CodeMirror.copyState(yamlMode, state.yaml),
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36 inner: CodeMirror.copyState(innerMode, state.inner)
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37 }
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38 },
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39 token: function (stream, state) {
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40 if (state.state == START) {
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41 if (stream.match('---', false)) {
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42 state.state = FRONTMATTER
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43 state.yaml = CodeMirror.startState(yamlMode)
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44 return yamlMode.token(stream, state.yaml)
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45 } else {
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46 state.state = BODY
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47 return innerMode.token(stream, state.inner)
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48 }
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49 } else if (state.state == FRONTMATTER) {
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50 var end = stream.sol() && stream.match(/(---|\.\.\.)/, false)
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51 var style = yamlMode.token(stream, state.yaml)
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52 if (end) {
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53 state.state = BODY
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54 state.yaml = null
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55 }
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56 return style
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57 } else {
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58 return innerMode.token(stream, state.inner)
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59 }
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60 },
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61 innerMode: localMode,
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62 indent: function(state, a, b) {
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63 var m = localMode(state)
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64 return m.mode.indent ? m.mode.indent(m.state, a, b) : CodeMirror.Pass
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65 },
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66 blankLine: function (state) {
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67 var m = localMode(state)
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68 if (m.mode.blankLine) return m.mode.blankLine(m.state)
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69 }
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70 }
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71 })
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72 });
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