GPQAPP

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// CodeMirror, copyright (c) by Marijn Haverbeke and others
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// Distributed under an MIT license: https://codemirror.net/LICENSE
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(function(mod) {
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  if (typeof exports == "object" && typeof module == "object") // CommonJS
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    mod(require("../../lib/codemirror"));
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  else if (typeof define == "function" && define.amd) // AMD
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    define(["../../lib/codemirror"], mod);
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  else // Plain browser env
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    mod(CodeMirror);
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})(function(CodeMirror) {
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  var Pos = CodeMirror.Pos;
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  function forEach(arr, f) {
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    for (var i = 0, e = arr.length; i < e; ++i) f(arr[i]);
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  }
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  function arrayContains(arr, item) {
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    if (!Array.prototype.indexOf) {
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      var i = arr.length;
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      while (i--) {
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        if (arr[i] === item) {
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          return true;
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        }
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      }
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      return false;
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    }
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    return arr.indexOf(item) != -1;
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  }
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  function scriptHint(editor, keywords, getToken, options) {
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    // Find the token at the cursor
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    var cur = editor.getCursor(), token = getToken(editor, cur);
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    if (/\b(?:string|comment)\b/.test(token.type)) return;
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    var innerMode = CodeMirror.innerMode(editor.getMode(), token.state);
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    if (innerMode.mode.helperType === "json") return;
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    token.state = innerMode.state;
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    // If it's not a 'word-style' token, ignore the token.
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    if (!/^[\w$_]*$/.test(token.string)) {
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      token = {start: cur.ch, end: cur.ch, string: "", state: token.state,
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               type: token.string == "." ? "property" : null};
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    } else if (token.end > cur.ch) {
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      token.end = cur.ch;
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      token.string = token.string.slice(0, cur.ch - token.start);
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    }
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    var tprop = token;
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    // If it is a property, find out what it is a property of.
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    while (tprop.type == "property") {
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      tprop = getToken(editor, Pos(cur.line, tprop.start));
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      if (tprop.string != ".") return;
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      tprop = getToken(editor, Pos(cur.line, tprop.start));
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      if (!context) var context = [];
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      context.push(tprop);
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    }
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    return {list: getCompletions(token, context, keywords, options),
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            from: Pos(cur.line, token.start),
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            to: Pos(cur.line, token.end)};
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  }
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  function javascriptHint(editor, options) {
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    return scriptHint(editor, javascriptKeywords,
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                      function (e, cur) {return e.getTokenAt(cur);},
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                      options);
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  };
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  CodeMirror.registerHelper("hint", "javascript", javascriptHint);
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  function getCoffeeScriptToken(editor, cur) {
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  // This getToken, it is for coffeescript, imitates the behavior of
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  // getTokenAt method in javascript.js, that is, returning "property"
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  // type and treat "." as independent token.
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    var token = editor.getTokenAt(cur);
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    if (cur.ch == token.start + 1 && token.string.charAt(0) == '.') {
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      token.end = token.start;
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      token.string = '.';
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      token.type = "property";
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    }
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    else if (/^\.[\w$_]*$/.test(token.string)) {
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      token.type = "property";
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      token.start++;
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      token.string = token.string.replace(/\./, '');
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    }
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    return token;
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  }
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  function coffeescriptHint(editor, options) {
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    return scriptHint(editor, coffeescriptKeywords, getCoffeeScriptToken, options);
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  }
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  CodeMirror.registerHelper("hint", "coffeescript", coffeescriptHint);
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  var stringProps = ("charAt charCodeAt indexOf lastIndexOf substring substr slice trim trimLeft trimRight " +
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                     "toUpperCase toLowerCase split concat match replace search").split(" ");
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  var arrayProps = ("length concat join splice push pop shift unshift slice reverse sort indexOf " +
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                    "lastIndexOf every some filter forEach map reduce reduceRight ").split(" ");
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  var funcProps = "prototype apply call bind".split(" ");
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  var javascriptKeywords = ("break case catch class const continue debugger default delete do else export extends false finally for function " +
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                  "if in import instanceof new null return super switch this throw true try typeof var void while with yield").split(" ");
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  var coffeescriptKeywords = ("and break catch class continue delete do else extends false finally for " +
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                  "if in instanceof isnt new no not null of off on or return switch then throw true try typeof until void while with yes").split(" ");
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  function forAllProps(obj, callback) {
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    if (!Object.getOwnPropertyNames || !Object.getPrototypeOf) {
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      for (var name in obj) callback(name)
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    } else {
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      for (var o = obj; o; o = Object.getPrototypeOf(o))
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        Object.getOwnPropertyNames(o).forEach(callback)
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    }
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  }
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  function getCompletions(token, context, keywords, options) {
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    var found = [], start = token.string, global = options && options.globalScope || window;
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    function maybeAdd(str) {
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      if (str.lastIndexOf(start, 0) == 0 && !arrayContains(found, str)) found.push(str);
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    }
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    function gatherCompletions(obj) {
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      if (typeof obj == "string") forEach(stringProps, maybeAdd);
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      else if (obj instanceof Array) forEach(arrayProps, maybeAdd);
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      else if (obj instanceof Function) forEach(funcProps, maybeAdd);
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      forAllProps(obj, maybeAdd)
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    }
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    if (context && context.length) {
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      // If this is a property, see if it belongs to some object we can
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      // find in the current environment.
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      var obj = context.pop(), base;
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      if (obj.type && obj.type.indexOf("variable") === 0) {
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        if (options && options.additionalContext)
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          base = options.additionalContext[obj.string];
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        if (!options || options.useGlobalScope !== false)
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          base = base || global[obj.string];
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      } else if (obj.type == "string") {
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        base = "";
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      } else if (obj.type == "atom") {
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        base = 1;
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      } else if (obj.type == "function") {
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        if (global.jQuery != null && (obj.string == '$' || obj.string == 'jQuery') &&
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            (typeof global.jQuery == 'function'))
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          base = global.jQuery();
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        else if (global._ != null && (obj.string == '_') && (typeof global._ == 'function'))
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          base = global._();
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      }
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      while (base != null && context.length)
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        base = base[context.pop().string];
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      if (base != null) gatherCompletions(base);
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    } else {
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      // If not, just look in the global object, any local scope, and optional additional-context
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      // (reading into JS mode internals to get at the local and global variables)
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      for (var v = token.state.localVars; v; v = v.next) maybeAdd(v.name);
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      for (var c = token.state.context; c; c = c.prev)
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        for (var v = c.vars; v; v = v.next) maybeAdd(v.name)
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      for (var v = token.state.globalVars; v; v = v.next) maybeAdd(v.name);
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      if (options && options.additionalContext != null)
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        for (var key in options.additionalContext)
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          maybeAdd(key);
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      if (!options || options.useGlobalScope !== false)
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        gatherCompletions(global);
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      forEach(keywords, maybeAdd);
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    }
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    return found;
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  }
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});
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