html5 boiler plate
[scannr.git] / js / flotr2 / examples / lib / codemirror / lib / util / javascript-hint.js
blob:a/js/flotr2/examples/lib/codemirror/lib/util/javascript-hint.js -> blob:b/js/flotr2/examples/lib/codemirror/lib/util/javascript-hint.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;
  }
   
  CodeMirror.javascriptHint = function(editor) {
  // Find the token at the cursor
  var cur = editor.getCursor(), token = editor.getTokenAt(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 = editor.getTokenAt({line: cur.line, ch: tprop.start});
  if (tprop.string != ".") return;
  tprop = editor.getTokenAt({line: cur.line, ch: tprop.start});
  if (!context) var context = [];
  context.push(tprop);
  }
  return {list: getCompletions(token, context),
  from: {line: cur.line, ch: token.start},
  to: {line: cur.line, ch: token.end}};
  }
   
  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 keywords = ("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(" ");
   
  function getCompletions(token, context) {
  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;
  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;
  }
  })();