[Summary view] [Print] [Text view]

   1  // CodeMirror, copyright (c) by Marijn Haverbeke and others
   2  // Distributed under an MIT license: https://codemirror.net/5/LICENSE
   3  
   4  (function(mod) {
   5    if (typeof exports == "object" && typeof module == "object") // CommonJS
   6      mod(require("../../lib/codemirror"));
   7    else if (typeof define == "function" && define.amd) // AMD
   8      define(["../../lib/codemirror"], mod);
   9    else // Plain browser env
  10      mod(CodeMirror);
  11  })(function(CodeMirror) {
  12    "use strict";
  13  
  14    CodeMirror.defineSimpleMode = function(name, states) {
  15      CodeMirror.defineMode(name, function(config) {
  16        return CodeMirror.simpleMode(config, states);
  17      });
  18    };
  19  
  20    CodeMirror.simpleMode = function(config, states) {
  21      ensureState(states, "start");
  22      var states_ = {}, meta = states.meta || {}, hasIndentation = false;
  23      for (var state in states) if (state != meta && states.hasOwnProperty(state)) {
  24        var list = states_[state] = [], orig = states[state];
  25        for (var i = 0; i < orig.length; i++) {
  26          var data = orig[i];
  27          list.push(new Rule(data, states));
  28          if (data.indent || data.dedent) hasIndentation = true;
  29        }
  30      }
  31      var mode = {
  32        startState: function() {
  33          return {state: "start", pending: null,
  34                  local: null, localState: null,
  35                  indent: hasIndentation ? [] : null};
  36        },
  37        copyState: function(state) {
  38          var s = {state: state.state, pending: state.pending,
  39                   local: state.local, localState: null,
  40                   indent: state.indent && state.indent.slice(0)};
  41          if (state.localState)
  42            s.localState = CodeMirror.copyState(state.local.mode, state.localState);
  43          if (state.stack)
  44            s.stack = state.stack.slice(0);
  45          for (var pers = state.persistentStates; pers; pers = pers.next)
  46            s.persistentStates = {mode: pers.mode,
  47                                  spec: pers.spec,
  48                                  state: pers.state == state.localState ? s.localState : CodeMirror.copyState(pers.mode, pers.state),
  49                                  next: s.persistentStates};
  50          return s;
  51        },
  52        token: tokenFunction(states_, config),
  53        innerMode: function(state) { return state.local && {mode: state.local.mode, state: state.localState}; },
  54        indent: indentFunction(states_, meta)
  55      };
  56      if (meta) for (var prop in meta) if (meta.hasOwnProperty(prop))
  57        mode[prop] = meta[prop];
  58      return mode;
  59    };
  60  
  61    function ensureState(states, name) {
  62      if (!states.hasOwnProperty(name))
  63        throw new Error("Undefined state " + name + " in simple mode");
  64    }
  65  
  66    function toRegex(val, caret) {
  67      if (!val) return /(?:)/;
  68      var flags = "";
  69      if (val instanceof RegExp) {
  70        if (val.ignoreCase) flags = "i";
  71        if (val.unicode) flags += "u"
  72        val = val.source;
  73      } else {
  74        val = String(val);
  75      }
  76      return new RegExp((caret === false ? "" : "^") + "(?:" + val + ")", flags);
  77    }
  78  
  79    function asToken(val) {
  80      if (!val) return null;
  81      if (val.apply) return val
  82      if (typeof val == "string") return val.replace(/\./g, " ");
  83      var result = [];
  84      for (var i = 0; i < val.length; i++)
  85        result.push(val[i] && val[i].replace(/\./g, " "));
  86      return result;
  87    }
  88  
  89    function Rule(data, states) {
  90      if (data.next || data.push) ensureState(states, data.next || data.push);
  91      this.regex = toRegex(data.regex);
  92      this.token = asToken(data.token);
  93      this.data = data;
  94    }
  95  
  96    function tokenFunction(states, config) {
  97      return function(stream, state) {
  98        if (state.pending) {
  99          var pend = state.pending.shift();
 100          if (state.pending.length == 0) state.pending = null;
 101          stream.pos += pend.text.length;
 102          return pend.token;
 103        }
 104  
 105        if (state.local) {
 106          if (state.local.end && stream.match(state.local.end)) {
 107            var tok = state.local.endToken || null;
 108            state.local = state.localState = null;
 109            return tok;
 110          } else {
 111            var tok = state.local.mode.token(stream, state.localState), m;
 112            if (state.local.endScan && (m = state.local.endScan.exec(stream.current())))
 113              stream.pos = stream.start + m.index;
 114            return tok;
 115          }
 116        }
 117  
 118        var curState = states[state.state];
 119        for (var i = 0; i < curState.length; i++) {
 120          var rule = curState[i];
 121          var matches = (!rule.data.sol || stream.sol()) && stream.match(rule.regex);
 122          if (matches) {
 123            if (rule.data.next) {
 124              state.state = rule.data.next;
 125            } else if (rule.data.push) {
 126              (state.stack || (state.stack = [])).push(state.state);
 127              state.state = rule.data.push;
 128            } else if (rule.data.pop && state.stack && state.stack.length) {
 129              state.state = state.stack.pop();
 130            }
 131  
 132            if (rule.data.mode)
 133              enterLocalMode(config, state, rule.data.mode, rule.token);
 134            if (rule.data.indent)
 135              state.indent.push(stream.indentation() + config.indentUnit);
 136            if (rule.data.dedent)
 137              state.indent.pop();
 138            var token = rule.token
 139            if (token && token.apply) token = token(matches)
 140            if (matches.length > 2 && rule.token && typeof rule.token != "string") {
 141              for (var j = 2; j < matches.length; j++)
 142                if (matches[j])
 143                  (state.pending || (state.pending = [])).push({text: matches[j], token: rule.token[j - 1]});
 144              stream.backUp(matches[0].length - (matches[1] ? matches[1].length : 0));
 145              return token[0];
 146            } else if (token && token.join) {
 147              return token[0];
 148            } else {
 149              return token;
 150            }
 151          }
 152        }
 153        stream.next();
 154        return null;
 155      };
 156    }
 157  
 158    function cmp(a, b) {
 159      if (a === b) return true;
 160      if (!a || typeof a != "object" || !b || typeof b != "object") return false;
 161      var props = 0;
 162      for (var prop in a) if (a.hasOwnProperty(prop)) {
 163        if (!b.hasOwnProperty(prop) || !cmp(a[prop], b[prop])) return false;
 164        props++;
 165      }
 166      for (var prop in b) if (b.hasOwnProperty(prop)) props--;
 167      return props == 0;
 168    }
 169  
 170    function enterLocalMode(config, state, spec, token) {
 171      var pers;
 172      if (spec.persistent) for (var p = state.persistentStates; p && !pers; p = p.next)
 173        if (spec.spec ? cmp(spec.spec, p.spec) : spec.mode == p.mode) pers = p;
 174      var mode = pers ? pers.mode : spec.mode || CodeMirror.getMode(config, spec.spec);
 175      var lState = pers ? pers.state : CodeMirror.startState(mode);
 176      if (spec.persistent && !pers)
 177        state.persistentStates = {mode: mode, spec: spec.spec, state: lState, next: state.persistentStates};
 178  
 179      state.localState = lState;
 180      state.local = {mode: mode,
 181                     end: spec.end && toRegex(spec.end),
 182                     endScan: spec.end && spec.forceEnd !== false && toRegex(spec.end, false),
 183                     endToken: token && token.join ? token[token.length - 1] : token};
 184    }
 185  
 186    function indexOf(val, arr) {
 187      for (var i = 0; i < arr.length; i++) if (arr[i] === val) return true;
 188    }
 189  
 190    function indentFunction(states, meta) {
 191      return function(state, textAfter, line) {
 192        if (state.local && state.local.mode.indent)
 193          return state.local.mode.indent(state.localState, textAfter, line);
 194        if (state.indent == null || state.local || meta.dontIndentStates && indexOf(state.state, meta.dontIndentStates) > -1)
 195          return CodeMirror.Pass;
 196  
 197        var pos = state.indent.length - 1, rules = states[state.state];
 198        scan: for (;;) {
 199          for (var i = 0; i < rules.length; i++) {
 200            var rule = rules[i];
 201            if (rule.data.dedent && rule.data.dedentIfLineStart !== false) {
 202              var m = rule.regex.exec(textAfter);
 203              if (m && m[0]) {
 204                pos--;
 205                if (rule.next || rule.push) rules = states[rule.next || rule.push];
 206                textAfter = textAfter.slice(m[0].length);
 207                continue scan;
 208              }
 209            }
 210          }
 211          break;
 212        }
 213        return pos < 0 ? 0 : state.indent[pos];
 214      };
 215    }
 216  });