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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"));
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7 else if (typeof define == "function" && define.amd) // AMD
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8 define(["../../lib/codemirror"], 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 "use strict";
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13
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14 CodeMirror.multiplexingMode = function(outer /*, others */) {
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15 // Others should be {open, close, mode [, delimStyle] [, innerStyle] [, parseDelimiters]} objects
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16 var others = Array.prototype.slice.call(arguments, 1);
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17
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18 function indexOf(string, pattern, from, returnEnd) {
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19 if (typeof pattern == "string") {
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20 var found = string.indexOf(pattern, from);
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21 return returnEnd && found > -1 ? found + pattern.length : found;
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22 }
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23 var m = pattern.exec(from ? string.slice(from) : string);
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24 return m ? m.index + from + (returnEnd ? m[0].length : 0) : -1;
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25 }
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26
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27 return {
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28 startState: function() {
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29 return {
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30 outer: CodeMirror.startState(outer),
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31 innerActive: null,
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32 inner: null,
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33 startingInner: false
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34 };
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35 },
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36
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37 copyState: function(state) {
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38 return {
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39 outer: CodeMirror.copyState(outer, state.outer),
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40 innerActive: state.innerActive,
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41 inner: state.innerActive && CodeMirror.copyState(state.innerActive.mode, state.inner),
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42 startingInner: state.startingInner
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43 };
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44 },
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45
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46 token: function(stream, state) {
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47 if (!state.innerActive) {
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48 var cutOff = Infinity, oldContent = stream.string;
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49 for (var i = 0; i < others.length; ++i) {
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50 var other = others[i];
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51 var found = indexOf(oldContent, other.open, stream.pos);
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52 if (found == stream.pos) {
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53 if (!other.parseDelimiters) stream.match(other.open);
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54 state.startingInner = !!other.parseDelimiters
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55 state.innerActive = other;
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56
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57 // Get the outer indent, making sure to handle CodeMirror.Pass
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58 var outerIndent = 0;
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59 if (outer.indent) {
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60 var possibleOuterIndent = outer.indent(state.outer, "", "");
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61 if (possibleOuterIndent !== CodeMirror.Pass) outerIndent = possibleOuterIndent;
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62 }
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63
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64 state.inner = CodeMirror.startState(other.mode, outerIndent);
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65 return other.delimStyle && (other.delimStyle + " " + other.delimStyle + "-open");
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66 } else if (found != -1 && found < cutOff) {
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67 cutOff = found;
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68 }
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69 }
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70 if (cutOff != Infinity) stream.string = oldContent.slice(0, cutOff);
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71 var outerToken = outer.token(stream, state.outer);
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72 if (cutOff != Infinity) stream.string = oldContent;
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73 return outerToken;
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74 } else {
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75 var curInner = state.innerActive, oldContent = stream.string;
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76 if (!curInner.close && stream.sol()) {
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77 state.innerActive = state.inner = null;
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78 return this.token(stream, state);
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79 }
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80 var found = curInner.close && !state.startingInner ?
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81 indexOf(oldContent, curInner.close, stream.pos, curInner.parseDelimiters) : -1;
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82 if (found == stream.pos && !curInner.parseDelimiters) {
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83 stream.match(curInner.close);
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84 state.innerActive = state.inner = null;
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85 return curInner.delimStyle && (curInner.delimStyle + " " + curInner.delimStyle + "-close");
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86 }
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87 if (found > -1) stream.string = oldContent.slice(0, found);
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88 var innerToken = curInner.mode.token(stream, state.inner);
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89 if (found > -1) stream.string = oldContent;
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90 else if (stream.pos > stream.start) state.startingInner = false
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91
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92 if (found == stream.pos && curInner.parseDelimiters)
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93 state.innerActive = state.inner = null;
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94
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95 if (curInner.innerStyle) {
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96 if (innerToken) innerToken = innerToken + " " + curInner.innerStyle;
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97 else innerToken = curInner.innerStyle;
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98 }
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99
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100 return innerToken;
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101 }
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102 },
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103
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104 indent: function(state, textAfter, line) {
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105 var mode = state.innerActive ? state.innerActive.mode : outer;
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106 if (!mode.indent) return CodeMirror.Pass;
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107 return mode.indent(state.innerActive ? state.inner : state.outer, textAfter, line);
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108 },
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109
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110 blankLine: function(state) {
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111 var mode = state.innerActive ? state.innerActive.mode : outer;
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112 if (mode.blankLine) {
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113 mode.blankLine(state.innerActive ? state.inner : state.outer);
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114 }
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115 if (!state.innerActive) {
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116 for (var i = 0; i < others.length; ++i) {
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117 var other = others[i];
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118 if (other.open === "\n") {
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119 state.innerActive = other;
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120 state.inner = CodeMirror.startState(other.mode, mode.indent ? mode.indent(state.outer, "", "") : 0);
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121 }
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122 }
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123 } else if (state.innerActive.close === "\n") {
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124 state.innerActive = state.inner = null;
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125 }
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126 },
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127
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128 electricChars: outer.electricChars,
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129
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130 innerMode: function(state) {
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131 return state.inner ? {state: state.inner, mode: state.innerActive.mode} : {state: state.outer, mode: outer};
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132 }
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133 };
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134 };
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135
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136 });
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