comparison libraries/json2/json2.js @ 5:c69a71b4f40f

Add slideshow module

+//  json2.js
+//  2016-10-28
+//  Public Domain.
+//  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
+//  See http://www.JSON.org/js.html
+//  This code should be minified before deployment.
+//  See http://javascript.crockford.com/jsmin.html
+
+//  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+//  NOT CONTROL.
+
+//  This file creates a global JSON object containing two methods: stringify
+//  and parse. This file provides the ES5 JSON capability to ES3 systems.
+//  If a project might run on IE8 or earlier, then this file should be included.
+//  This file does nothing on ES5 systems.
+
+//      JSON.stringify(value, replacer, space)
+//          value       any JavaScript value, usually an object or array.
+//          replacer    an optional parameter that determines how object
+//                      values are stringified for objects. It can be a
+//                      function or an array of strings.
+//          space       an optional parameter that specifies the indentation
+//                      of nested structures. If it is omitted, the text will
+//                      be packed without extra whitespace. If it is a number,
+//                      it will specify the number of spaces to indent at each
+//                      level. If it is a string (such as "\t" or " "),
+//                      it contains the characters used to indent at each level.
+//          This method produces a JSON text from a JavaScript value.
+//          When an object value is found, if the object contains a toJSON
+//          method, its toJSON method will be called and the result will be
+//          stringified. A toJSON method does not serialize: it returns the
+//          value represented by the name/value pair that should be serialized,
+//          or undefined if nothing should be serialized. The toJSON method
+//          will be passed the key associated with the value, and this will be
+//          bound to the value.
+
+//          For example, this would serialize Dates as ISO strings.
+
+//              Date.prototype.toJSON = function (key) {
+//                  function f(n) {
+//                      // Format integers to have at least two digits.
+//                      return (n < 10)
+//                          ? "0" + n
+//                          : n;
+//                  }
+//                  return this.getUTCFullYear()   + "-" +
+//                       f(this.getUTCMonth() + 1) + "-" +
+//                       f(this.getUTCDate())      + "T" +
+//                       f(this.getUTCHours())     + ":" +
+//                       f(this.getUTCMinutes())   + ":" +
+//                       f(this.getUTCSeconds())   + "Z";
+//              };
+
+//          You can provide an optional replacer method. It will be passed the
+//          key and value of each member, with this bound to the containing
+//          object. The value that is returned from your method will be
+//          serialized. If your method returns undefined, then the member will
+//          be excluded from the serialization.
+
+//          If the replacer parameter is an array of strings, then it will be
+//          used to select the members to be serialized. It filters the results
+//          such that only members with keys listed in the replacer array are
+//          stringified.
+
+//          Values that do not have JSON representations, such as undefined or
+//          functions, will not be serialized. Such values in objects will be
+//          dropped; in arrays they will be replaced with null. You can use
+//          a replacer function to replace those with JSON values.
+
+//          JSON.stringify(undefined) returns undefined.
+
+//          The optional space parameter produces a stringification of the
+//          value that is filled with line breaks and indentation to make it
+//          easier to read.
+
+//          If the space parameter is a non-empty string, then that string will
+//          be used for indentation. If the space parameter is a number, then
+//          the indentation will be that many spaces.
+
+//          Example:
+
+//          text = JSON.stringify(["e", {pluribus: "unum"}]);
+//          // text is '["e",{"pluribus":"unum"}]'
+
+//          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
+//          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+
+//          text = JSON.stringify([new Date()], function (key, value) {
+//              return this[key] instanceof Date
+//                  ? "Date(" + this[key] + ")"
+//                  : value;
+//          });
+//          // text is '["Date(---current time---)"]'
+
+//      JSON.parse(text, reviver)
+//          This method parses a JSON text to produce an object or array.
+//          It can throw a SyntaxError exception.
+
+//          The optional reviver parameter is a function that can filter and
+//          transform the results. It receives each of the keys and values,
+//          and its return value is used instead of the original value.
+//          If it returns what it received, then the structure is not modified.
+//          If it returns undefined then the member is deleted.
+
+//          Example:
+
+//          // Parse the text. Values that look like ISO date strings will
+//          // be converted to Date objects.
+
+//          myData = JSON.parse(text, function (key, value) {
+//              var a;
+//              if (typeof value === "string") {
+//                  a =
+//   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
+//                  if (a) {
+//                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+//                          +a[5], +a[6]));
+//                  }
+//              }
+//              return value;
+//          });
+
+//          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
+//              var d;
+//              if (typeof value === "string" &&
+//                      value.slice(0, 5) === "Date(" &&
+//                      value.slice(-1) === ")") {
+//                  d = new Date(value.slice(5, -1));
+//                  if (d) {
+//                      return d;
+//                  }
+//              }
+//              return value;
+//          });
+
+//  This is a reference implementation. You are free to copy, modify, or
+//  redistribute.
+
+/*jslint
+    eval, for, this
+*/
+
+/*property
+    JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
+    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
+    lastIndex, length, parse, prototype, push, replace, slice, stringify,
+    test, toJSON, toString, valueOf
+*/
+
+
+// Create a JSON object only if one does not already exist. We create the
+// methods in a closure to avoid creating global variables.
+
+if (typeof JSON !== "object") {
+    JSON = {};
+}
+
+(function () {
+    "use strict";
+
+    var rx_one = /^[\],:{}\s]*$/;
+    var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
+    var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
+    var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
+    var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+    var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+
+    function f(n) {
+        // Format integers to have at least two digits.
+        return n < 10
+            ? "0" + n
+            : n;
+    }
+
+    function this_value() {
+        return this.valueOf();
+    }
+
+    if (typeof Date.prototype.toJSON !== "function") {
+
+        Date.prototype.toJSON = function () {
+
+            return isFinite(this.valueOf())
+                ? this.getUTCFullYear() + "-" +
+                        f(this.getUTCMonth() + 1) + "-" +
+                        f(this.getUTCDate()) + "T" +
+                        f(this.getUTCHours()) + ":" +
+                        f(this.getUTCMinutes()) + ":" +
+                        f(this.getUTCSeconds()) + "Z"
+                : null;
+        };
+
+        Boolean.prototype.toJSON = this_value;
+        Number.prototype.toJSON = this_value;
+        String.prototype.toJSON = this_value;
+    }
+
+    var gap;
+    var indent;
+    var meta;
+    var rep;
+
+
+    function quote(string) {
+
+// If the string contains no control characters, no quote characters, and no
+// backslash characters, then we can safely slap some quotes around it.
+// Otherwise we must also replace the offending characters with safe escape
+// sequences.
+
+        rx_escapable.lastIndex = 0;
+        return rx_escapable.test(string)
+            ? "\"" + string.replace(rx_escapable, function (a) {
+                var c = meta[a];
+                return typeof c === "string"
+                    ? c
+                    : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
+            }) + "\""
+            : "\"" + string + "\"";
+    }
+
+
+    function str(key, holder) {
+
+// Produce a string from holder[key].
+
+        var i;          // The loop counter.
+        var k;          // The member key.
+        var v;          // The member value.
+        var length;
+        var mind = gap;
+        var partial;
+        var value = holder[key];
+
+// If the value has a toJSON method, call it to obtain a replacement value.
+
+        if (value && typeof value === "object" &&
+                typeof value.toJSON === "function") {
+            value = value.toJSON(key);
+        }
+
+// If we were called with a replacer function, then call the replacer to
+// obtain a replacement value.
+
+        if (typeof rep === "function") {
+            value = rep.call(holder, key, value);
+        }
+
+// What happens next depends on the value's type.
+
+        switch (typeof value) {
+        case "string":
+            return quote(value);
+
+        case "number":
+
+// JSON numbers must be finite. Encode non-finite numbers as null.
+
+            return isFinite(value)
+                ? String(value)
+                : "null";
+
+        case "boolean":
+        case "null":
+
+// If the value is a boolean or null, convert it to a string. Note:
+// typeof null does not produce "null". The case is included here in
+// the remote chance that this gets fixed someday.
+
+            return String(value);
+
+// If the type is "object", we might be dealing with an object or an array or
+// null.
+
+        case "object":
+
+// Due to a specification blunder in ECMAScript, typeof null is "object",
+// so watch out for that case.
+
+            if (!value) {
+                return "null";
+            }
+
+// Make an array to hold the partial results of stringifying this object value.
+
+            gap += indent;
+            partial = [];
+
+// Is the value an array?
+
+            if (Object.prototype.toString.apply(value) === "[object Array]") {
+
+// The value is an array. Stringify every element. Use null as a placeholder
+// for non-JSON values.
+
+                length = value.length;
+                for (i = 0; i < length; i += 1) {
+                    partial[i] = str(i, value) || "null";
+                }
+
+// Join all of the elements together, separated with commas, and wrap them in
+// brackets.
+
+                v = partial.length === 0
+                    ? "[]"
+                    : gap
+                        ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]"
+                        : "[" + partial.join(",") + "]";
+                gap = mind;
+                return v;
+            }
+
+// If the replacer is an array, use it to select the members to be stringified.
+
+            if (rep && typeof rep === "object") {
+                length = rep.length;
+                for (i = 0; i < length; i += 1) {
+                    if (typeof rep[i] === "string") {
+                        k = rep[i];
+                        v = str(k, value);
+                        if (v) {
+                            partial.push(quote(k) + (
+                                gap
+                                    ? ": "
+                                    : ":"
+                            ) + v);
+                        }
+                    }
+                }
+            } else {
+
+// Otherwise, iterate through all of the keys in the object.
+
+                for (k in value) {
+                    if (Object.prototype.hasOwnProperty.call(value, k)) {
+                        v = str(k, value);
+                        if (v) {
+                            partial.push(quote(k) + (
+                                gap
+                                    ? ": "
+                                    : ":"
+                            ) + v);
+                        }
+                    }
+                }
+            }
+
+// Join all of the member texts together, separated with commas,
+// and wrap them in braces.
+
+            v = partial.length === 0
+                ? "{}"
+                : gap
+                    ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}"
+                    : "{" + partial.join(",") + "}";
+            gap = mind;
+            return v;
+        }
+    }
+
+// If the JSON object does not yet have a stringify method, give it one.
+
+    if (typeof JSON.stringify !== "function") {
+        meta = {    // table of character substitutions
+            "\b": "\\b",
+            "\t": "\\t",
+            "\n": "\\n",
+            "\f": "\\f",
+            "\r": "\\r",
+            "\"": "\\\"",
+            "\\": "\\\\"
+        };
+        JSON.stringify = function (value, replacer, space) {
+
+// The stringify method takes a value and an optional replacer, and an optional
+// space parameter, and returns a JSON text. The replacer can be a function
+// that can replace values, or an array of strings that will select the keys.
+// A default replacer method can be provided. Use of the space parameter can
+// produce text that is more easily readable.
+
+            var i;
+            gap = "";
+            indent = "";
+
+// If the space parameter is a number, make an indent string containing that
+// many spaces.
+
+            if (typeof space === "number") {
+                for (i = 0; i < space; i += 1) {
+                    indent += " ";
+                }
+
+// If the space parameter is a string, it will be used as the indent string.
+
+            } else if (typeof space === "string") {
+                indent = space;
+            }
+
+// If there is a replacer, it must be a function or an array.
+// Otherwise, throw an error.
+
+            rep = replacer;
+            if (replacer && typeof replacer !== "function" &&
+                    (typeof replacer !== "object" ||
+                    typeof replacer.length !== "number")) {
+                throw new Error("JSON.stringify");
+            }
+
+// Make a fake root object containing our value under the key of "".
+// Return the result of stringifying the value.
+
+            return str("", {"": value});
+        };
+    }
+
+
+// If the JSON object does not yet have a parse method, give it one.
+
+    if (typeof JSON.parse !== "function") {
+        JSON.parse = function (text, reviver) {
+
+// The parse method takes a text and an optional reviver function, and returns
+// a JavaScript value if the text is a valid JSON text.
+
+            var j;
+
+            function walk(holder, key) {
+
+// The walk method is used to recursively walk the resulting structure so
+// that modifications can be made.
+
+                var k;
+                var v;
+                var value = holder[key];
+                if (value && typeof value === "object") {
+                    for (k in value) {
+                        if (Object.prototype.hasOwnProperty.call(value, k)) {
+                            v = walk(value, k);
+                            if (v !== undefined) {
+                                value[k] = v;
+                            } else {
+                                delete value[k];
+                            }
+                        }
+                    }
+                }
+                return reviver.call(holder, key, value);
+            }
+
+
+// Parsing happens in four stages. In the first stage, we replace certain
+// Unicode characters with escape sequences. JavaScript handles many characters
+// incorrectly, either silently deleting them, or treating them as line endings.
+
+            text = String(text);
+            rx_dangerous.lastIndex = 0;
+            if (rx_dangerous.test(text)) {
+                text = text.replace(rx_dangerous, function (a) {
+                    return "\\u" +
+                            ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
+                });
+            }
+
+// In the second stage, we run the text against regular expressions that look
+// for non-JSON patterns. We are especially concerned with "()" and "new"
+// because they can cause invocation, and "=" because it can cause mutation.
+// But just to be safe, we want to reject all unexpected forms.
+
+// We split the second stage into 4 regexp operations in order to work around
+// crippling inefficiencies in IE's and Safari's regexp engines. First we
+// replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
+// replace all simple value tokens with "]" characters. Third, we delete all
+// open brackets that follow a colon or comma or that begin the text. Finally,
+// we look to see that the remaining characters are only whitespace or "]" or
+// "," or ":" or "{" or "}". If that is so, then the text is safe for eval.
+
+            if (
+                rx_one.test(
+                    text
+                        .replace(rx_two, "@")
+                        .replace(rx_three, "]")
+                        .replace(rx_four, "")
+                )
+            ) {
+
+// In the third stage we use the eval function to compile the text into a
+// JavaScript structure. The "{" operator is subject to a syntactic ambiguity
+// in JavaScript: it can begin a block or an object literal. We wrap the text
+// in parens to eliminate the ambiguity.
+
+                j = eval("(" + text + ")");
+
+// In the optional fourth stage, we recursively walk the new structure, passing
+// each name/value pair to a reviver function for possible transformation.
+
+                return (typeof reviver === "function")
+                    ? walk({"": j}, "")
+                    : j;
+            }
+
+// If the text is not JSON parseable, then a SyntaxError is thrown.
+
+            throw new SyntaxError("JSON.parse");
+        };
+    }
+}());