topical media & game development

talk show tell print

mobile-query-three-www-live-playground-vendor-CodeMirror2-lib-util-javascript-hint.js / js



  (function () {
    function forEach(arr, f) {
      for (var i = 0, e = arr.length; i < e; ++i) f(arr[i]);
    }
    
    function arrayContains(arr, item) {
      if (!Array.prototype.indexOf) {
        var i = arr.length;
        while (i--) {
          if (arr[i] === item) {
            return true;
          }
        }
        return false;
      }
      return arr.indexOf(item) != -1;
    }
  
    function scriptHint(editor, keywords, getToken) {
      // Find the token at the cursor
      var cur = editor.getCursor(), token = getToken(editor, cur), tprop = token;
      // If it's not a 'word-style' token, ignore the token.
                  if (!/^[\w_]*/.test(token.string)) {
        token = tprop = {start: cur.ch, end: cur.ch, string: "", state: token.state,
                         className: token.string == "." ? "property" : null};
      }
      // If it is a property, find out what it is a property of.
      while (tprop.className == "property") {
        tprop = getToken(editor, {line: cur.line, ch: tprop.start});
        if (tprop.string != ".") return;
        tprop = getToken(editor, {line: cur.line, ch: tprop.start});
        if (tprop.string == ')') {
          var level = 1;
          do {
            tprop = getToken(editor, {line: cur.line, ch: tprop.start});
            switch (tprop.string) {
            case ')': level++; break;
            case '(': level--; break;
            default: break;
            }
          } while (level > 0)
          tprop = getToken(editor, {line: cur.line, ch: tprop.start});
                                  if (tprop.className == 'variable')
                                          tprop.className = 'function';
                                  else return; // no clue
        }
        if (!context) var context = [];
        context.push(tprop);
      }
      return {list: getCompletions(token, context, keywords),
              from: {line: cur.line, ch: token.start},
              to: {line: cur.line, ch: token.end}};
    }
  
    CodeMirror.javascriptHint = function(editor) {
      return scriptHint(editor, javascriptKeywords,
                        function (e, cur) {return e.getTokenAt(cur);});
    }
  
    function getCoffeeScriptToken(editor, cur) {
    // This getToken, it is for coffeescript, imitates the behavior of
    // getTokenAt method in javascript.js, that is, returning "property"
    // type and treat "." as indepenent token.
      var token = editor.getTokenAt(cur);
      if (cur.ch == token.start + 1 && token.string.charAt(0) == '.') {
        token.end = token.start;
        token.string = '.';
        token.className = "property";
      }
      else if (/^\.[\w_]*/.test(token.string)) {
        token.className = "property";
        token.start++;
        token.string = token.string.replace(/\./, '');
      }
      return token;
    }
  
    CodeMirror.coffeescriptHint = function(editor) {
      return scriptHint(editor, coffeescriptKeywords, getCoffeeScriptToken);
    }
  
    var stringProps = ("charAt charCodeAt indexOf lastIndexOf substring substr slice trim trimLeft trimRight " +
                       "toUpperCase toLowerCase split concat match replace search").split(" ");
    var arrayProps = ("length concat join splice push pop shift unshift slice reverse sort indexOf " +
                      "lastIndexOf every some filter forEach map reduce reduceRight ").split(" ");
    var funcProps = "prototype apply call bind".split(" ");
    var javascriptKeywords = ("break case catch continue debugger default delete do else false finally for function " +
                    "if in instanceof new null return switch throw true try typeof var void while with").split(" ");
    var coffeescriptKeywords = ("and break catch class continue delete do else extends false finally for " +
                    "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(" ");
  
    function getCompletions(token, context, keywords) {
      var found = [], start = token.string;
      function maybeAdd(str) {
        if (str.indexOf(start) == 0 && !arrayContains(found, str)) found.push(str);
      }
      function gatherCompletions(obj) {
        if (typeof obj == "string") forEach(stringProps, maybeAdd);
        else if (obj instanceof Array) forEach(arrayProps, maybeAdd);
        else if (obj instanceof Function) forEach(funcProps, maybeAdd);
        for (var name in obj) maybeAdd(name);
      }
  
      if (context) {
        // If this is a property, see if it belongs to some object we can
        // find in the current environment.
        var obj = context.pop(), base;
        if (obj.className == "variable")
          base = window[obj.string];
        else if (obj.className == "string")
          base = "";
        else if (obj.className == "atom")
          base = 1;
        else if (obj.className == "function") {
          if (window.jQuery != null && (obj.string == '' || obj.string == 'jQuery') &&
              (typeof jQuery == 'function')) base = jQuery();
          else if (window._ != null && (obj.string == '_') && (typeof _ == 'function')) base = _();
        }
        while (base != null && context.length)
          base = base[context.pop().string];
        if (base != null) gatherCompletions(base);
      }
      else {
        // If not, just look in the window object and any local scope
        // (reading into JS mode internals to get at the local variables)
        for (var v = token.state.localVars; v; v = v.next) maybeAdd(v.name);
        gatherCompletions(window);
        forEach(keywords, maybeAdd);
      }
      return found;
    }
  })();
  


(C) Æliens 04/09/2009

You may not copy or print any of this material without explicit permission of the author or the publisher. In case of other copyright issues, contact the author.