Club Drupal

/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */

'use strict';

// Checking if the typed arrays are supported

(function checkTypedArrayCompatibility() {

  if (typeof Uint8Array !== 'undefined') {

    // some mobile versions do not support subarray (e.g. safari 5 / iOS)

    if (typeof Uint8Array.prototype.subarray === 'undefined') {

        Uint8Array.prototype.subarray = function subarray(start, end) {

          return new Uint8Array(this.slice(start, end));

        };

        Float32Array.prototype.subarray = function subarray(start, end) {

          return new Float32Array(this.slice(start, end));

        };

    }

    // some mobile version might not support Float64Array

    if (typeof Float64Array === 'undefined')

      window.Float64Array = Float32Array;

    return;

  }

  function subarray(start, end) {

    return new TypedArray(this.slice(start, end));

  }

  function setArrayOffset(array, offset) {

    if (arguments.length < 2)

      offset = 0;

    for (var i = 0, n = array.length; i < n; ++i, ++offset)

      this[offset] = array[i] & 0xFF;

  }

  function TypedArray(arg1) {

    var result;

    if (typeof arg1 === 'number') {

      result = [];

      for (var i = 0; i < arg1; ++i)

        result[i] = 0;

    } else

      result = arg1.slice(0);

    result.subarray = subarray;

    result.buffer = result;

    result.byteLength = result.length;

    result.set = setArrayOffset;

    if (typeof arg1 === 'object' && arg1.buffer)

      result.buffer = arg1.buffer;

    return result;

  }

  window.Uint8Array = TypedArray;

  // we don't need support for set, byteLength for 32-bit array

  // so we can use the TypedArray as well

  window.Uint32Array = TypedArray;

  window.Int32Array = TypedArray;

  window.Uint16Array = TypedArray;

  window.Float32Array = TypedArray;

  window.Float64Array = TypedArray;

})();

// Object.create() ?

(function checkObjectCreateCompatibility() {

  if (typeof Object.create !== 'undefined')

    return;

  Object.create = function objectCreate(proto) {

    var constructor = function objectCreateConstructor() {};

    constructor.prototype = proto;

    return new constructor();

  };

})();

// Object.defineProperty() ?

(function checkObjectDefinePropertyCompatibility() {

  if (typeof Object.defineProperty !== 'undefined') {

    // some browsers (e.g. safari) cannot use defineProperty() on DOM objects

    // and thus the native version is not sufficient

    var definePropertyPossible = true;

    try {

      Object.defineProperty(new Image(), 'id', { value: 'test' });

    } catch (e) {

      definePropertyPossible = false;

    }

    if (definePropertyPossible) return;

  }

  Object.defineProperty = function objectDefineProperty(obj, name, def) {

    delete obj[name];

    if ('get' in def)

      obj.__defineGetter__(name, def['get']);

    if ('set' in def)

      obj.__defineSetter__(name, def['set']);

    if ('value' in def) {

      obj.__defineSetter__(name, function objectDefinePropertySetter(value) {

        this.__defineGetter__(name, function objectDefinePropertyGetter() {

          return value;

        });

        return value;

      });

      obj[name] = def.value;

    }

  };

})();

// Object.keys() ?

(function checkObjectKeysCompatibility() {

  if (typeof Object.keys !== 'undefined')

    return;

  Object.keys = function objectKeys(obj) {

    var result = [];

    for (var i in obj) {

      if (obj.hasOwnProperty(i))

        result.push(i);

    }

    return result;

  };

})();

// No readAsArrayBuffer ?

(function checkFileReaderReadAsArrayBuffer() {

  if (typeof FileReader === 'undefined')

    return; // FileReader is not implemented

  var frPrototype = FileReader.prototype;

  // Older versions of Firefox might not have readAsArrayBuffer

  if ('readAsArrayBuffer' in frPrototype)

    return; // readAsArrayBuffer is implemented

  Object.defineProperty(frPrototype, 'readAsArrayBuffer', {

    value: function fileReaderReadAsArrayBuffer(blob) {

      var fileReader = new FileReader();

      var originalReader = this;

      fileReader.onload = function fileReaderOnload(evt) {

        var data = evt.target.result;

        var buffer = new ArrayBuffer(data.length);

        var uint8Array = new Uint8Array(buffer);

        for (var i = 0, ii = data.length; i < ii; i++)

          uint8Array[i] = data.charCodeAt(i);

        Object.defineProperty(originalReader, 'result', {

          value: buffer,

          enumerable: true,

          writable: false,

          configurable: true

        });

        var event = document.createEvent('HTMLEvents');

        event.initEvent('load', false, false);

        originalReader.dispatchEvent(event);

      };

      fileReader.readAsBinaryString(blob);

    }

  });

})();

// No XMLHttpRequest.response ?

(function checkXMLHttpRequestResponseCompatibility() {

  var xhrPrototype = XMLHttpRequest.prototype;

  if (!('overrideMimeType' in xhrPrototype)) {

    // IE10 might have response, but not overrideMimeType

    Object.defineProperty(xhrPrototype, 'overrideMimeType', {

      value: function xmlHttpRequestOverrideMimeType(mimeType) {}

    });

  }

  if ('response' in xhrPrototype ||

      'mozResponseArrayBuffer' in xhrPrototype ||

      'mozResponse' in xhrPrototype ||

      'responseArrayBuffer' in xhrPrototype)

    return;

  // IE9 ?

  if (typeof VBArray !== 'undefined') {

    Object.defineProperty(xhrPrototype, 'response', {

      get: function xmlHttpRequestResponseGet() {

        return new Uint8Array(new VBArray(this.responseBody).toArray());

      }

    });

    return;

  }

  // other browsers

  function responseTypeSetter() {

    // will be only called to set "arraybuffer"

    this.overrideMimeType('text/plain; charset=x-user-defined');

  }

  if (typeof xhrPrototype.overrideMimeType === 'function') {

    Object.defineProperty(xhrPrototype, 'responseType',

                          { set: responseTypeSetter });

  }

  function responseGetter() {

    var text = this.responseText;

    var i, n = text.length;

    var result = new Uint8Array(n);

    for (i = 0; i < n; ++i)

      result[i] = text.charCodeAt(i) & 0xFF;

    return result;

  }

  Object.defineProperty(xhrPrototype, 'response', { get: responseGetter });

})();

// window.btoa (base64 encode function) ?

(function checkWindowBtoaCompatibility() {

  if ('btoa' in window)

    return;

  var digits =

    'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';

  window.btoa = function windowBtoa(chars) {

    var buffer = '';

    var i, n;

    for (i = 0, n = chars.length; i < n; i += 3) {

      var b1 = chars.charCodeAt(i) & 0xFF;

      var b2 = chars.charCodeAt(i + 1) & 0xFF;

      var b3 = chars.charCodeAt(i + 2) & 0xFF;

      var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);

      var d3 = i + 1 < n ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;

      var d4 = i + 2 < n ? (b3 & 0x3F) : 64;

      buffer += (digits.charAt(d1) + digits.charAt(d2) +

                 digits.charAt(d3) + digits.charAt(d4));

    }

    return buffer;

  };

})();

// Function.prototype.bind ?

(function checkFunctionPrototypeBindCompatibility() {

  if (typeof Function.prototype.bind !== 'undefined')

    return;

  Function.prototype.bind = function functionPrototypeBind(obj) {

    var fn = this, headArgs = Array.prototype.slice.call(arguments, 1);

    var bound = function functionPrototypeBindBound() {

      var args = Array.prototype.concat.apply(headArgs, arguments);

      return fn.apply(obj, args);

    };

    return bound;

  };

})();

// IE9/10 text/html data URI

(function checkDataURICompatibility() {

  if (!('documentMode' in document) ||

      document.documentMode !== 9 && document.documentMode !== 10)

    return;

  // overriding the src property

  var originalSrcDescriptor = Object.getOwnPropertyDescriptor(

    HTMLIFrameElement.prototype, 'src');

  Object.defineProperty(HTMLIFrameElement.prototype, 'src', {

    get: function htmlIFrameElementPrototypeSrcGet() { return this.$src; },

    set: function htmlIFrameElementPrototypeSrcSet(src) {

      this.$src = src;

      if (src.substr(0, 14) != 'data:text/html') {

        originalSrcDescriptor.set.call(this, src);

        return;

      }

      // for text/html, using blank document and then

      // document's open, write, and close operations

      originalSrcDescriptor.set.call(this, 'about:blank');

      setTimeout((function htmlIFrameElementPrototypeSrcOpenWriteClose() {

        var doc = this.contentDocument;

        doc.open('text/html');

        doc.write(src.substr(src.indexOf(',') + 1));

        doc.close();

      }).bind(this), 0);

    },

    enumerable: true

  });

})();

// HTMLElement dataset property

(function checkDatasetProperty() {

  var div = document.createElement('div');

  if ('dataset' in div)

    return; // dataset property exists

  Object.defineProperty(HTMLElement.prototype, 'dataset', {

    get: function() {

      if (this._dataset)

        return this._dataset;

      var dataset = {};

      for (var j = 0, jj = this.attributes.length; j < jj; j++) {

        var attribute = this.attributes[j];

        if (attribute.name.substring(0, 5) != 'data-')

          continue;

        var key = attribute.name.substring(5).replace(/\-([a-z])/g,

          function(all, ch) { return ch.toUpperCase(); });

        dataset[key] = attribute.value;

      }

      Object.defineProperty(this, '_dataset', {

        value: dataset,

        writable: false,

        enumerable: false

      });

      return dataset;

    },

    enumerable: true

  });

})();

// HTMLElement classList property

(function checkClassListProperty() {

  var div = document.createElement('div');

  if ('classList' in div)

    return; // classList property exists

  function changeList(element, itemName, add, remove) {

    var s = element.className || '';

    var list = s.split(/\s+/g);

    if (list[0] == '') list.shift();

    var index = list.indexOf(itemName);

    if (index < 0 && add)

      list.push(itemName);

    if (index >= 0 && remove)

      list.splice(index, 1);

    element.className = list.join(' ');

  }

  var classListPrototype = {

    add: function(name) {

      changeList(this.element, name, true, false);

    },

    remove: function(name) {

      changeList(this.element, name, false, true);

    },

    toggle: function(name) {

      changeList(this.element, name, true, true);

    }

  };

  Object.defineProperty(HTMLElement.prototype, 'classList', {

    get: function() {

      if (this._classList)

        return this._classList;

      var classList = Object.create(classListPrototype, {

        element: {

          value: this,

          writable: false,

          enumerable: true

        }

      });

      Object.defineProperty(this, '_classList', {

        value: classList,

        writable: false,

        enumerable: false

      });

      return classList;

    },

    enumerable: true

  });

})();

// Check console compatability

(function checkConsoleCompatibility() {

  if (typeof console == 'undefined') {

    console = {log: function() {}};

  }

})();

// Check onclick compatibility in Opera

(function checkOnClickCompatibility() {

  // workaround for reported Opera bug DSK-354448:

  // onclick fires on disabled buttons with opaque content

  function ignoreIfTargetDisabled(event) {

    if (isDisabled(event.target)) {

      event.stopPropagation();

    }

  }

  function isDisabled(node) {

    return node.disabled || (node.parentNode && isDisabled(node.parentNode));

  }

  if (navigator.userAgent.indexOf('Opera') != -1) {

    // use browser detection since we cannot feature-check this bug

    document.addEventListener('click', ignoreIfTargetDisabled, true);

  }

})();

// Checks if navigator.language is supported

(function checkNavigatorLanguage() {

  if ('language' in navigator)

    return;

  Object.defineProperty(navigator, 'language', {

    get: function navigatorLanguage() {

      var language = navigator.userLanguage || 'en-US';

      return language.substring(0, 2).toLowerCase() +

        language.substring(2).toUpperCase();

    },

    enumerable: true

  });

})();