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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.defineSimpleMode = function(name, states) {
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15 CodeMirror.defineMode(name, function(config) {
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16 return CodeMirror.simpleMode(config, states);
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17 });
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18 };
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19
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20 CodeMirror.simpleMode = function(config, states) {
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21 ensureState(states, "start");
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22 var states_ = {}, meta = states.meta || {}, hasIndentation = false;
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23 for (var state in states) if (state != meta && states.hasOwnProperty(state)) {
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24 var list = states_[state] = [], orig = states[state];
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25 for (var i = 0; i < orig.length; i++) {
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26 var data = orig[i];
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27 list.push(new Rule(data, states));
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28 if (data.indent || data.dedent) hasIndentation = true;
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29 }
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30 }
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31 var mode = {
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32 startState: function() {
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33 return {state: "start", pending: null,
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34 local: null, localState: null,
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35 indent: hasIndentation ? [] : null};
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36 },
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37 copyState: function(state) {
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38 var s = {state: state.state, pending: state.pending,
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39 local: state.local, localState: null,
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40 indent: state.indent && state.indent.slice(0)};
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41 if (state.localState)
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42 s.localState = CodeMirror.copyState(state.local.mode, state.localState);
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43 if (state.stack)
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44 s.stack = state.stack.slice(0);
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45 for (var pers = state.persistentStates; pers; pers = pers.next)
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46 s.persistentStates = {mode: pers.mode,
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47 spec: pers.spec,
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48 state: pers.state == state.localState ? s.localState : CodeMirror.copyState(pers.mode, pers.state),
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49 next: s.persistentStates};
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50 return s;
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51 },
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52 token: tokenFunction(states_, config),
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53 innerMode: function(state) { return state.local && {mode: state.local.mode, state: state.localState}; },
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54 indent: indentFunction(states_, meta)
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55 };
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56 if (meta) for (var prop in meta) if (meta.hasOwnProperty(prop))
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57 mode[prop] = meta[prop];
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58 return mode;
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59 };
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60
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61 function ensureState(states, name) {
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62 if (!states.hasOwnProperty(name))
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63 throw new Error("Undefined state " + name + " in simple mode");
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64 }
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65
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66 function toRegex(val, caret) {
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67 if (!val) return /(?:)/;
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68 var flags = "";
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69 if (val instanceof RegExp) {
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70 if (val.ignoreCase) flags = "i";
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71 if (val.unicode) flags += "u"
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72 val = val.source;
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73 } else {
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74 val = String(val);
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75 }
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76 return new RegExp((caret === false ? "" : "^") + "(?:" + val + ")", flags);
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77 }
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78
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79 function asToken(val) {
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80 if (!val) return null;
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81 if (val.apply) return val
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82 if (typeof val == "string") return val.replace(/\./g, " ");
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83 var result = [];
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84 for (var i = 0; i < val.length; i++)
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85 result.push(val[i] && val[i].replace(/\./g, " "));
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86 return result;
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87 }
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88
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89 function Rule(data, states) {
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90 if (data.next || data.push) ensureState(states, data.next || data.push);
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91 this.regex = toRegex(data.regex);
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92 this.token = asToken(data.token);
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93 this.data = data;
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94 }
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95
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96 function tokenFunction(states, config) {
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97 return function(stream, state) {
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98 if (state.pending) {
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99 var pend = state.pending.shift();
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100 if (state.pending.length == 0) state.pending = null;
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101 stream.pos += pend.text.length;
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102 return pend.token;
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103 }
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104
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105 if (state.local) {
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106 if (state.local.end && stream.match(state.local.end)) {
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107 var tok = state.local.endToken || null;
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108 state.local = state.localState = null;
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109 return tok;
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110 } else {
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111 var tok = state.local.mode.token(stream, state.localState), m;
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112 if (state.local.endScan && (m = state.local.endScan.exec(stream.current())))
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113 stream.pos = stream.start + m.index;
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114 return tok;
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115 }
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116 }
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117
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118 var curState = states[state.state];
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119 for (var i = 0; i < curState.length; i++) {
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120 var rule = curState[i];
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121 var matches = (!rule.data.sol || stream.sol()) && stream.match(rule.regex);
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122 if (matches) {
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123 if (rule.data.next) {
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124 state.state = rule.data.next;
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125 } else if (rule.data.push) {
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126 (state.stack || (state.stack = [])).push(state.state);
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127 state.state = rule.data.push;
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128 } else if (rule.data.pop && state.stack && state.stack.length) {
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129 state.state = state.stack.pop();
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130 }
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131
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132 if (rule.data.mode)
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133 enterLocalMode(config, state, rule.data.mode, rule.token);
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134 if (rule.data.indent)
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135 state.indent.push(stream.indentation() + config.indentUnit);
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136 if (rule.data.dedent)
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137 state.indent.pop();
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138 var token = rule.token
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139 if (token && token.apply) token = token(matches)
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140 if (matches.length > 2 && rule.token && typeof rule.token != "string") {
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141 for (var j = 2; j < matches.length; j++)
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142 if (matches[j])
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143 (state.pending || (state.pending = [])).push({text: matches[j], token: rule.token[j - 1]});
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144 stream.backUp(matches[0].length - (matches[1] ? matches[1].length : 0));
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145 return token[0];
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146 } else if (token && token.join) {
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147 return token[0];
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148 } else {
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149 return token;
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150 }
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151 }
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152 }
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153 stream.next();
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154 return null;
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155 };
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156 }
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157
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158 function cmp(a, b) {
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159 if (a === b) return true;
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160 if (!a || typeof a != "object" || !b || typeof b != "object") return false;
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161 var props = 0;
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162 for (var prop in a) if (a.hasOwnProperty(prop)) {
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163 if (!b.hasOwnProperty(prop) || !cmp(a[prop], b[prop])) return false;
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164 props++;
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165 }
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166 for (var prop in b) if (b.hasOwnProperty(prop)) props--;
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167 return props == 0;
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168 }
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169
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170 function enterLocalMode(config, state, spec, token) {
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171 var pers;
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172 if (spec.persistent) for (var p = state.persistentStates; p && !pers; p = p.next)
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173 if (spec.spec ? cmp(spec.spec, p.spec) : spec.mode == p.mode) pers = p;
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174 var mode = pers ? pers.mode : spec.mode || CodeMirror.getMode(config, spec.spec);
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175 var lState = pers ? pers.state : CodeMirror.startState(mode);
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176 if (spec.persistent && !pers)
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177 state.persistentStates = {mode: mode, spec: spec.spec, state: lState, next: state.persistentStates};
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178
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179 state.localState = lState;
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180 state.local = {mode: mode,
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181 end: spec.end && toRegex(spec.end),
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182 endScan: spec.end && spec.forceEnd !== false && toRegex(spec.end, false),
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183 endToken: token && token.join ? token[token.length - 1] : token};
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184 }
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185
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186 function indexOf(val, arr) {
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187 for (var i = 0; i < arr.length; i++) if (arr[i] === val) return true;
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188 }
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189
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190 function indentFunction(states, meta) {
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191 return function(state, textAfter, line) {
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192 if (state.local && state.local.mode.indent)
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193 return state.local.mode.indent(state.localState, textAfter, line);
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194 if (state.indent == null || state.local || meta.dontIndentStates && indexOf(state.state, meta.dontIndentStates) > -1)
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195 return CodeMirror.Pass;
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196
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197 var pos = state.indent.length - 1, rules = states[state.state];
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198 scan: for (;;) {
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199 for (var i = 0; i < rules.length; i++) {
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200 var rule = rules[i];
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201 if (rule.data.dedent && rule.data.dedentIfLineStart !== false) {
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202 var m = rule.regex.exec(textAfter);
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203 if (m && m[0]) {
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204 pos--;
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205 if (rule.next || rule.push) rules = states[rule.next || rule.push];
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206 textAfter = textAfter.slice(m[0].length);
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207 continue scan;
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208 }
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209 }
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210 }
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211 break;
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212 }
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213 return pos < 0 ? 0 : state.indent[pos];
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214 };
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215 }
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216 });
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