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   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    var Pos = CodeMirror.Pos;
  13  
  14    function forEach(arr, f) {
  15      for (var i = 0, e = arr.length; i < e; ++i) f(arr[i]);
  16    }
  17  
  18    function arrayContains(arr, item) {
  19      if (!Array.prototype.indexOf) {
  20        var i = arr.length;
  21        while (i--) {
  22          if (arr[i] === item) {
  23            return true;
  24          }
  25        }
  26        return false;
  27      }
  28      return arr.indexOf(item) != -1;
  29    }
  30  
  31    function scriptHint(editor, keywords, getToken, options) {
  32      // Find the token at the cursor
  33      var cur = editor.getCursor(), token = getToken(editor, cur);
  34      if (/\b(?:string|comment)\b/.test(token.type)) return;
  35      var innerMode = CodeMirror.innerMode(editor.getMode(), token.state);
  36      if (innerMode.mode.helperType === "json") return;
  37      token.state = innerMode.state;
  38  
  39      // If it's not a 'word-style' token, ignore the token.
  40      if (!/^[\w$_]*$/.test(token.string)) {
  41        token = {start: cur.ch, end: cur.ch, string: "", state: token.state,
  42                 type: token.string == "." ? "property" : null};
  43      } else if (token.end > cur.ch) {
  44        token.end = cur.ch;
  45        token.string = token.string.slice(0, cur.ch - token.start);
  46      }
  47  
  48      var tprop = token;
  49      // If it is a property, find out what it is a property of.
  50      while (tprop.type == "property") {
  51        tprop = getToken(editor, Pos(cur.line, tprop.start));
  52        if (tprop.string != ".") return;
  53        tprop = getToken(editor, Pos(cur.line, tprop.start));
  54        if (!context) var context = [];
  55        context.push(tprop);
  56      }
  57      return {list: getCompletions(token, context, keywords, options),
  58              from: Pos(cur.line, token.start),
  59              to: Pos(cur.line, token.end)};
  60    }
  61  
  62    function javascriptHint(editor, options) {
  63      return scriptHint(editor, javascriptKeywords,
  64                        function (e, cur) {return e.getTokenAt(cur);},
  65                        options);
  66    };
  67    CodeMirror.registerHelper("hint", "javascript", javascriptHint);
  68  
  69    function getCoffeeScriptToken(editor, cur) {
  70    // This getToken, it is for coffeescript, imitates the behavior of
  71    // getTokenAt method in javascript.js, that is, returning "property"
  72    // type and treat "." as independent token.
  73      var token = editor.getTokenAt(cur);
  74      if (cur.ch == token.start + 1 && token.string.charAt(0) == '.') {
  75        token.end = token.start;
  76        token.string = '.';
  77        token.type = "property";
  78      }
  79      else if (/^\.[\w$_]*$/.test(token.string)) {
  80        token.type = "property";
  81        token.start++;
  82        token.string = token.string.replace(/\./, '');
  83      }
  84      return token;
  85    }
  86  
  87    function coffeescriptHint(editor, options) {
  88      return scriptHint(editor, coffeescriptKeywords, getCoffeeScriptToken, options);
  89    }
  90    CodeMirror.registerHelper("hint", "coffeescript", coffeescriptHint);
  91  
  92    var stringProps = ("charAt charCodeAt indexOf lastIndexOf substring substr slice trim trimLeft trimRight " +
  93                       "toUpperCase toLowerCase split concat match replace search").split(" ");
  94    var arrayProps = ("length concat join splice push pop shift unshift slice reverse sort indexOf " +
  95                      "lastIndexOf every some filter forEach map reduce reduceRight ").split(" ");
  96    var funcProps = "prototype apply call bind".split(" ");
  97    var javascriptKeywords = ("break case catch class const continue debugger default delete do else export extends false finally for function " +
  98                    "if in import instanceof new null return super switch this throw true try typeof var void while with yield").split(" ");
  99    var coffeescriptKeywords = ("and break catch class continue delete do else extends false finally for " +
 100                    "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(" ");
 101  
 102    function forAllProps(obj, callback) {
 103      if (!Object.getOwnPropertyNames || !Object.getPrototypeOf) {
 104        for (var name in obj) callback(name)
 105      } else {
 106        for (var o = obj; o; o = Object.getPrototypeOf(o))
 107          Object.getOwnPropertyNames(o).forEach(callback)
 108      }
 109    }
 110  
 111    function getCompletions(token, context, keywords, options) {
 112      var found = [], start = token.string, global = options && options.globalScope || window;
 113      function maybeAdd(str) {
 114        if (str.lastIndexOf(start, 0) == 0 && !arrayContains(found, str)) found.push(str);
 115      }
 116      function gatherCompletions(obj) {
 117        if (typeof obj == "string") forEach(stringProps, maybeAdd);
 118        else if (obj instanceof Array) forEach(arrayProps, maybeAdd);
 119        else if (obj instanceof Function) forEach(funcProps, maybeAdd);
 120        forAllProps(obj, maybeAdd)
 121      }
 122  
 123      if (context && context.length) {
 124        // If this is a property, see if it belongs to some object we can
 125        // find in the current environment.
 126        var obj = context.pop(), base;
 127        if (obj.type && obj.type.indexOf("variable") === 0) {
 128          if (options && options.additionalContext)
 129            base = options.additionalContext[obj.string];
 130          if (!options || options.useGlobalScope !== false)
 131            base = base || global[obj.string];
 132        } else if (obj.type == "string") {
 133          base = "";
 134        } else if (obj.type == "atom") {
 135          base = 1;
 136        } else if (obj.type == "function") {
 137          if (global.jQuery != null && (obj.string == '$' || obj.string == 'jQuery') &&
 138              (typeof global.jQuery == 'function'))
 139            base = global.jQuery();
 140          else if (global._ != null && (obj.string == '_') && (typeof global._ == 'function'))
 141            base = global._();
 142        }
 143        while (base != null && context.length)
 144          base = base[context.pop().string];
 145        if (base != null) gatherCompletions(base);
 146      } else {
 147        // If not, just look in the global object, any local scope, and optional additional-context
 148        // (reading into JS mode internals to get at the local and global variables)
 149        for (var v = token.state.localVars; v; v = v.next) maybeAdd(v.name);
 150        for (var c = token.state.context; c; c = c.prev)
 151          for (var v = c.vars; v; v = v.next) maybeAdd(v.name)
 152        for (var v = token.state.globalVars; v; v = v.next) maybeAdd(v.name);
 153        if (options && options.additionalContext != null)
 154          for (var key in options.additionalContext)
 155            maybeAdd(key);
 156        if (!options || options.useGlobalScope !== false)
 157          gatherCompletions(global);
 158        forEach(keywords, maybeAdd);
 159      }
 160      return found;
 161    }
 162  });