GPQAPP

1
// CodeMirror, copyright (c) by Marijn Haverbeke and others
2
// Distributed under an MIT license: https://codemirror.net/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
});
217