// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

class JsNames {
  static const javaScriptKeywords = const <String>[
    // These are current keywords
    "break", "delete", "function", "return", "typeof", "case", "do", "if",
    "switch", "var", "catch", "else", "in", "this", "void", "continue",
    "false", "instanceof", "throw", "while", "debugger", "finally", "new",
    "true", "with", "default", "for", "null", "try",

    // These are future keywords
    "abstract", "double", "goto", "native", "static", "boolean", "enum",
    "implements", "package", "super", "byte", "export", "import", "private",
    "synchronized", "char", "extends", "int", "protected", "throws",
    "class", "final", "interface", "public", "transient", "const", "float",
    "long", "short", "volatile"
  ];

  static const reservedGlobalSymbols = const <String>[
    // Section references are from Ecma-262
    // (http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf)

    // 15.1.1 Value Properties of the Global Object
    "NaN", "Infinity", "undefined",

    // 15.1.2 Function Properties of the Global Object
    "eval", "parseInt", "parseFloat", "isNan", "isFinite",

    // 15.1.3 URI Handling Function Properties
    "decodeURI", "decodeURIComponent",
    "encodeURI",
    "encodeURIComponent",

    // 15.1.4 Constructor Properties of the Global Object
    "Object", "Function", "Array", "String", "Boolean", "Number", "Date",
    "RegExp", "Error", "EvalError", "RangeError", "ReferenceError",
    "SyntaxError", "TypeError", "URIError",

    // 15.1.5 Other Properties of the Global Object
    "Math",

    // 10.1.6 Activation Object
    "arguments",

    // B.2 Additional Properties (non-normative)
    "escape", "unescape",

    // Window props (https://developer.mozilla.org/en/DOM/window)
    "applicationCache", "closed", "Components", "content", "controllers",
    "crypto", "defaultStatus", "dialogArguments", "directories",
    "document", "frameElement", "frames", "fullScreen", "globalStorage",
    "history", "innerHeight", "innerWidth", "length",
    "location", "locationbar", "localStorage", "menubar",
    "mozInnerScreenX", "mozInnerScreenY", "mozScreenPixelsPerCssPixel",
    "name", "navigator", "opener", "outerHeight", "outerWidth",
    "pageXOffset", "pageYOffset", "parent", "personalbar", "pkcs11",
    "returnValue", "screen", "scrollbars", "scrollMaxX", "scrollMaxY",
    "self", "sessionStorage", "sidebar", "status", "statusbar", "toolbar",
    "top", "window",

    // Window methods (https://developer.mozilla.org/en/DOM/window)
    "alert", "addEventListener", "atob", "back", "blur", "btoa",
    "captureEvents", "clearInterval", "clearTimeout", "close", "confirm",
    "disableExternalCapture", "dispatchEvent", "dump",
    "enableExternalCapture", "escape", "find", "focus", "forward",
    "GeckoActiveXObject", "getAttention", "getAttentionWithCycleCount",
    "getComputedStyle", "getSelection", "home", "maximize", "minimize",
    "moveBy", "moveTo", "open", "openDialog", "postMessage", "print",
    "prompt", "QueryInterface", "releaseEvents", "removeEventListener",
    "resizeBy", "resizeTo", "restore", "routeEvent", "scroll", "scrollBy",
    "scrollByLines", "scrollByPages", "scrollTo", "setInterval",
    "setResizeable", "setTimeout", "showModalDialog", "sizeToContent",
    "stop", "uuescape", "updateCommands", "XPCNativeWrapper",
    "XPCSafeJSOjbectWrapper",

    // Mozilla Window event handlers, same cite
    "onabort", "onbeforeunload", "onchange", "onclick", "onclose",
    "oncontextmenu", "ondragdrop", "onerror", "onfocus", "onhashchange",
    "onkeydown", "onkeypress", "onkeyup", "onload", "onmousedown",
    "onmousemove", "onmouseout", "onmouseover", "onmouseup",
    "onmozorientation", "onpaint", "onreset", "onresize", "onscroll",
    "onselect", "onsubmit", "onunload",

    // Safari Web Content Guide
    // http://developer.apple.com/library/safari/#documentation/AppleApplications/Reference/SafariWebContent/SafariWebContent.pdf
    // WebKit Window member data, from WebKit DOM Reference
    // (http://developer.apple.com/safari/library/documentation/AppleApplications/Reference/WebKitDOMRef/DOMWindow_idl/Classes/DOMWindow/index.html)
    "ontouchcancel", "ontouchend", "ontouchmove", "ontouchstart",
    "ongesturestart", "ongesturechange", "ongestureend",

    // extra window methods
    "uneval",

    // keywords https://developer.mozilla.org/en/New_in_JavaScript_1.7,
    // https://developer.mozilla.org/en/New_in_JavaScript_1.8.1
    "getPrototypeOf", "let", "yield",

    // "future reserved words"
    "abstract", "int", "short", "boolean", "interface", "static", "byte",
    "long", "char", "final", "native", "synchronized", "float", "package",
    "throws", "goto", "private", "transient", "implements", "protected",
    "volatile", "double", "public",

    // IE methods
    // (http://msdn.microsoft.com/en-us/library/ms535873(VS.85).aspx#)
    "attachEvent", "clientInformation", "clipboardData", "createPopup",
    "dialogHeight", "dialogLeft", "dialogTop", "dialogWidth",
    "onafterprint", "onbeforedeactivate", "onbeforeprint",
    "oncontrolselect", "ondeactivate", "onhelp", "onresizeend",

    // Common browser-defined identifiers not defined in ECMAScript
    "event", "external", "Debug", "Enumerator", "Global", "Image",
    "ActiveXObject", "VBArray", "Components",

    // Functions commonly defined on Object
    "toString", "getClass", "constructor", "prototype", "valueOf",

    // Client-side JavaScript identifiers, which are needed for linkers
    // that don't ensure GWT's window != $wnd, document != $doc, etc.
    // Taken from the Rhino book, pg 715
    "Anchor", "Applet", "Attr", "Canvas", "CanvasGradient",
    "CanvasPattern", "CanvasRenderingContext2D", "CDATASection",
    "CharacterData", "Comment", "CSS2Properties", "CSSRule",
    "CSSStyleSheet", "Document", "DocumentFragment", "DocumentType",
    "DOMException", "DOMImplementation", "DOMParser", "Element", "Event",
    "ExternalInterface", "FlashPlayer", "Form", "Frame", "History",
    "HTMLCollection", "HTMLDocument", "HTMLElement", "IFrame", "Image",
    "Input", "JSObject", "KeyEvent", "Link", "Location", "MimeType",
    "MouseEvent", "Navigator", "Node", "NodeList", "Option", "Plugin",
    "ProcessingInstruction", "Range", "RangeException", "Screen", "Select",
    "Table", "TableCell", "TableRow", "TableSelection", "Text", "TextArea",
    "UIEvent", "Window", "XMLHttpRequest", "XMLSerializer",
    "XPathException", "XPathResult", "XSLTProcessor",

    // These keywords trigger the loading of the java-plugin. For the
    // next-generation plugin, this results in starting a new Java process.
    "java", "Packages", "netscape", "sun", "JavaObject", "JavaClass",
    "JavaArray", "JavaMember",

    // GWT-defined identifiers
    "\$wnd", "\$doc", "\$entry", "\$moduleName", "\$moduleBase",
    "\$gwt_version", "\$sessionId",

    // Identifiers used by JsStackEmulator; later set to obfuscatable
    "\$stack", "\$stackDepth", "\$location",

    // TODO: prove why this is necessary or remove it
    "call"
  ];

  static const reservedPropertySymbols =
      const <String>["__PROTO__", "prototype", "constructor"];

  static Set<String> _reserved;

  static Set<String> get reserved {
    if (_reserved == null) {
      _reserved = new Set<String>();
      _reserved.addAll(reservedPropertySymbols);
      _reserved.addAll(reservedGlobalSymbols);
      _reserved.addAll(javaScriptKeywords);
    }
    return _reserved;
  }

  // TODO(ngeoffray): only the namer should call this method.
  // Eventually move it there.
  /*
   * Returns a name that does not clash with reserved JS keywords,
   * and also ensures it won't clash with other identifiers.
   */
  static String getValid(String name) {
    if (reserved.contains(name)) {
      name = '$name\$';
      assert(!reserved.contains(name));
    } else if (name.contains(r'$')) {
      name = name.replaceAll(r'$', r'$$');
    }
    return name;
  }
}