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canvas-lms
mirror of https://github.com/instructure/canvas-lms.git
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get rid of some IE 6/7/8 code. 

fixes: CNVS-12363

this is all just old crufty stuff that since we don't
support IE <= 8 we don't need.

the only noticeable difference is that if you try to
go to canvas in IE 8 it will give you that
"this browser is not supported" screen. I don't think
it did that before

Change-Id: I9e11eb0925502d1862616a971ce88126c7d5eb67
Reviewed-on: https://gerrit.instructure.com/30409
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Ryan Florence <ryanf@instructure.com>
QA-Review: Nathan Rogowski <nathan@instructure.com>
Product-Review: Ryan Shaw <ryan@instructure.com>
This commit is contained in:
Ryan Shaw 2014-02-20 12:07:56 -07:00
parent 95faa5fb36
commit 6dda1b53a6
10 changed files with 10 additions and 684 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
app/coffeescripts/bundles/common.coffee
View File

@ -25,10 +25,6 @@ require [
'compiled/behaviors/admin-links'
'compiled/behaviors/activate'
'compiled/behaviors/elementToggler'
# uncomment these to turn on collection pinning and voting
# 'compiled/behaviors/upvote-item'
# 'compiled/behaviors/repin-item'
# 'compiled/behaviors/follow'
'compiled/behaviors/tooltip'
'compiled/behaviors/instructure_inline_media_comment'
@ -54,11 +50,6 @@ require [
helpDialog.initTriggers()
tours.init()
# Make the font-based icons work in IE8,
# it needs to be told to redraw pseudo elements on page load
if INST.browser.ie8
$('<style>:before,:after{content:"" !important}</style>').appendTo('head').delay(1).remove()
$('#skip_navigation_link').on 'click', ->
$($(this).attr('href')).attr('tabindex', -1).focus()

2
app/coffeescripts/bundles/json2.coffee
View File

@ -1,2 +0,0 @@
require ['vendor/json2']

3
app/views/layouts/_foot.html.erb
View File

@ -1,7 +1,4 @@
<script>
window.JSON || document.write('<%= (javascript_include_tag "#{js_base_url}/vendor/json2.js").gsub("</script>", "<\\/script>") %>');
(''.trim && Function.prototype.bind) || document.write('<%= (javascript_include_tag "#{js_base_url}/es5_shim.js").gsub("</script>", "<\\/script>") %>');
INST = <%= raw(inst_env.to_json) %>;
ENV = <%= raw Api.recursively_stringify_json_ids(js_env.clone).to_json %>;

18
app/views/layouts/_head.html.erb
View File

@ -5,41 +5,35 @@
yield :pre_html
-%><!DOCTYPE html>
<!--[if IE 7 ]> <html class="ie ie7 scripts-not-loaded" lang=<%= @locale %>> <![endif]-->
<!--[if IE 8 ]> <html class="ie ie8 scripts-not-loaded" lang=<%= @locale %>> <![endif]-->
<!--[if gte IE 9 ]><html class="ie ie9 scripts-not-loaded" lang=<%= @locale %>> <![endif]-->
<!--[if !(IE)]><!--> <html class="not-ie scripts-not-loaded" lang=<%= @locale %>> <!--<![endif]-->
<head>
<meta charset="utf-8">
<title><%= yield :page_title || t('default_page_title', "Canvas LMS") %></title>
<noscript> <h1>You need to have javascript enabled in order to access this site.</h1> </noscript>
<!--[if lte IE 6]> <meta http-equiv=refresh content="0; URL=/ie-6-is-not-supported.html" /> <![endif]-->
<!--[if lte IE 8]> <meta http-equiv=refresh content="0; URL=/ie-8-is-not-supported.html" /> <![endif]-->
<%= yield :auto_discovery %>
<%= yield :head %>
<%= yield :meta_tags %>
<%= include_css_bundles %>
<!--[if lte IE 8]> <%= javascript_include_tag "vendor/html5.js" %> <![endif]-->
<%= yield :stylesheets %>
<%= include_account_css %>
<script>
// listen for any clicks on links that have href="#" and queue them to be fired on dom ready.
_earlyClick = function(e){
e = e || window.event;
function _earlyClick(e){
var cur = e.target || e.srcElement;
while ( cur && cur.ownerDocument ) {
if ( cur.getAttribute('href') === '#' ) {
e.preventDefault ? e.preventDefault() : e.returnValue = false;
if ( cur.getAttribute('href') == '#' ) {
e.preventDefault();
_earlyClick.clicks = _earlyClick.clicks || [];
_earlyClick.clicks.push(cur);
break;
}
cur = cur.parentNode;
}
};
document.addEventListener ?
document.addEventListener('click', _earlyClick, false) :
document.attachEvent('onclick', _earlyClick);
}
document.addEventListener('click', _earlyClick);
</script>
</head>
<body class="<%= (@body_classes).uniq.join(" ") %>">

3
app/views/layouts/facebook.html.erb
View File

@ -5,7 +5,7 @@
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title><%= t :title, "Facebook Page" %></title>
<noscript> <meta http-equiv=refresh content="0; URL=/enable-javascript.html" /> </noscript>
<!--[if lte IE 6]> <meta http-equiv=refresh content="0; URL=/ie-6-is-not-supported.html" /> <![endif]-->
<!--[if lte IE 8]> <meta http-equiv=refresh content="0; URL=/ie-8-is-not-supported.html" /> <![endif]-->
<%= include_common_stylesheets %>
<%= include_stylesheets :facebook %>
</head>
@ -15,7 +15,6 @@
</div>
<script>
window.JSON || document.write('<%= (javascript_include_tag "#{js_base_url}/vendor/json2.js").gsub("</script>", "<\\/script>") %>');
INST = <%= raw(inst_env.to_json) %>;
ENV = <%= raw js_env.to_json %>;

4
public/ie-6-is-not-supported.html → public/ie-8-is-not-supported.html
View File

@ -1,10 +1,10 @@
<!DOCTYPE html>
<html>
<head>
<title>Internet Explorer 6 is not supported on this website</title>
<title>Internet Explorer version 8 and below are not supported on this website</title>
</head>
<body>
<h1>Internet Explorer version 6 is so outdated it is not supported on this website.</h1>
<h1>Internet Explorer version 8 and below are so outdated they are not supported on this website.</h1>
<p>
May we suggest some better, more modern browsers? <a href="http://getfirefox.com">download firefox here</a> or <a href="http://www.google.com/chrome">get Google Chrome here</a>.
</p>

156
public/javascripts/es5_shim.js
View File

@ -1,156 +0,0 @@
// this just grabs Function.prototype.bind and String.prototype.trim from
// https://github.com/kriskowal/es5-shim
(function(){
var slice = Array.prototype.slice;
//
// Function
// ========
//
// ES-5 15.3.4.5
// http://es5.github.com/#x15.3.4.5
if (!Function.prototype.bind) {
Function.prototype.bind = function bind(that) { // .length is 1
// 1. Let Target be the this value.
var target = this;
// 2. If IsCallable(Target) is false, throw a TypeError exception.
if (typeof target != "function") {
throw new TypeError("Function.prototype.bind called on incompatible " + target);
}
// 3. Let A be a new (possibly empty) internal list of all of the
// argument values provided after thisArg (arg1, arg2 etc), in order.
// XXX slicedArgs will stand in for "A" if used
var args = slice.call(arguments, 1); // for normal call
// 4. Let F be a new native ECMAScript object.
// 11. Set the [[Prototype]] internal property of F to the standard
// built-in Function prototype object as specified in 15.3.3.1.
// 12. Set the [[Call]] internal property of F as described in
// 15.3.4.5.1.
// 13. Set the [[Construct]] internal property of F as described in
// 15.3.4.5.2.
// 14. Set the [[HasInstance]] internal property of F as described in
// 15.3.4.5.3.
var bound = function () {
if (this instanceof bound) {
// 15.3.4.5.2 [[Construct]]
// When the [[Construct]] internal method of a function object,
// F that was created using the bind function is called with a
// list of arguments ExtraArgs, the following steps are taken:
// 1. Let target be the value of F's [[TargetFunction]]
// internal property.
// 2. If target has no [[Construct]] internal method, a
// TypeError exception is thrown.
// 3. Let boundArgs be the value of F's [[BoundArgs]] internal
// property.
// 4. Let args be a new list containing the same values as the
// list boundArgs in the same order followed by the same
// values as the list ExtraArgs in the same order.
// 5. Return the result of calling the [[Construct]] internal
// method of target providing args as the arguments.
var F = function(){};
F.prototype = target.prototype;
var self = new F;
var result = target.apply(
self,
args.concat(slice.call(arguments))
);
if (Object(result) === result) {
return result;
}
return self;
} else {
// 15.3.4.5.1 [[Call]]
// When the [[Call]] internal method of a function object, F,
// which was created using the bind function is called with a
// this value and a list of arguments ExtraArgs, the following
// steps are taken:
// 1. Let boundArgs be the value of F's [[BoundArgs]] internal
// property.
// 2. Let boundThis be the value of F's [[BoundThis]] internal
// property.
// 3. Let target be the value of F's [[TargetFunction]] internal
// property.
// 4. Let args be a new list containing the same values as the
// list boundArgs in the same order followed by the same
// values as the list ExtraArgs in the same order.
// 5. Return the result of calling the [[Call]] internal method
// of target providing boundThis as the this value and
// providing args as the arguments.
// equiv: target.call(this, ...boundArgs, ...args)
return target.apply(
that,
args.concat(slice.call(arguments))
);
}
};
// XXX bound.length is never writable, so don't even try
//
// 15. If the [[Class]] internal property of Target is "Function", then
// a. Let L be the length property of Target minus the length of A.
// b. Set the length own property of F to either 0 or L, whichever is
// larger.
// 16. Else set the length own property of F to 0.
// 17. Set the attributes of the length own property of F to the values
// specified in 15.3.5.1.
// TODO
// 18. Set the [[Extensible]] internal property of F to true.
// TODO
// 19. Let thrower be the [[ThrowTypeError]] function Object (13.2.3).
// 20. Call the [[DefineOwnProperty]] internal method of F with
// arguments "caller", PropertyDescriptor {[[Get]]: thrower, [[Set]]:
// thrower, [[Enumerable]]: false, [[Configurable]]: false}, and
// false.
// 21. Call the [[DefineOwnProperty]] internal method of F with
// arguments "arguments", PropertyDescriptor {[[Get]]: thrower,
// [[Set]]: thrower, [[Enumerable]]: false, [[Configurable]]: false},
// and false.
// TODO
// NOTE Function objects created using Function.prototype.bind do not
// have a prototype property or the [[Code]], [[FormalParameters]], and
// [[Scope]] internal properties.
// XXX can't delete prototype in pure-js.
// 22. Return F.
return bound;
};
}
//
// String
// ======
//
// ES5 15.5.4.20
// http://es5.github.com/#x15.5.4.20
var ws = "\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003" +
"\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028" +
"\u2029\uFEFF";
if (!String.prototype.trim || ws.trim()) {
// http://blog.stevenlevithan.com/archives/faster-trim-javascript
// http://perfectionkills.com/whitespace-deviations/
ws = "[" + ws + "]";
var trimBeginRegexp = new RegExp("^" + ws + ws + "*"),
trimEndRegexp = new RegExp(ws + ws + "*$");
String.prototype.trim = function trim() {
if (this === undefined || this === null) {
throw new TypeError("can't convert "+this+" to object");
}
return String(this).replace(trimBeginRegexp, "").replace(trimEndRegexp, "");
};
}
})();

12
public/javascripts/instructure.js
View File

@ -64,9 +64,7 @@ define([
if (window._earlyClick) {
// unset the onclick handler we were using to capture the events
document.removeEventListener ?
document.removeEventListener('click', _earlyClick, false) :
document.detachEvent('onclick', _earlyClick);
document.removeEventListener('click', _earlyClick);
if (_earlyClick.clicks) {
// wait to fire the "click" events till after all of the event hanlders loaded at dom ready are initialized
@ -120,14 +118,6 @@ define([
.delegate('.menu-item', 'mouseenter focusin', hoverMenuItem )
.delegate('.menu-item', 'mouseleave focusout', unhoverMenuItem );
// ie7 needs some help forcing the columns to be as wide as (width_of_one_column * #_of_columns_in_this_dropdown)
if (INST.browser.ie7) {
$(".menu-item-drop")
.width(function(){
var $columns = $(this).find(".menu-item-drop-column");
return $columns.length * $columns.css('width').replace('px', '');
});
}
// this stuff is for the ipad, it needs a little help getting the drop menus to show up
$menu_items.live('touchstart', function(){

9
public/javascripts/vendor/html5.js vendored
View File

@ -1,9 +0,0 @@
/*! HTML5 Shiv vpre3.5 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed */
// copied from https://github.com/aFarkas/html5shiv/blob/master/src/html5shiv-printshiv.js
(function(n,k){function t(a,c){var e=a.createElement("p"),h=a.getElementsByTagName("head")[0]||a.documentElement;e.innerHTML="x<style>"+c+"</style>";return h.insertBefore(e.lastChild,h.firstChild)}function p(){var a=l.elements;return typeof a=="string"?a.split(" "):a}function w(a){var c={},e=a.createElement,h=a.createDocumentFragment,i=h();a.createElement=function(b){l.shivMethods||e(b);var d;d=c[b]?c[b].cloneNode():x.test(b)?(c[b]=e(b)).cloneNode():e(b);return d.canHaveChildren&&!y.test(b)?i.appendChild(d):
d};a.createDocumentFragment=Function("h,f","return function(){var n=f.cloneNode(),c=n.createElement;h.shivMethods&&("+p().join().replace(/\w+/g,function(b){e(b);i.createElement(b);return'c("'+b+'")'})+");return n}")(l,i)}function u(a){var c;if(a.documentShived)return a;if(l.shivCSS&&!q)c=!!t(a,"article,aside,details,figcaption,figure,footer,header,hgroup,nav,section{display:block}audio{display:none}canvas,video{display:inline-block;*display:inline;*zoom:1}[hidden]{display:none}audio[controls]{display:inline-block;*display:inline;*zoom:1}mark{background:#FF0;color:#000}");
r||(c=!w(a));if(c)a.documentShived=c;return a}function z(a){for(var c,e=a.attributes,h=e.length,i=a.ownerDocument.createElement(o+":"+a.nodeName);h--;){c=e[h];c.specified&&i.setAttribute(c.nodeName,c.nodeValue)}i.style.cssText=a.style.cssText;return i}function v(a){var c,e,h=a.namespaces,i=a.parentWindow;if(!A||a.printShived)return a;typeof h[o]=="undefined"&&h.add(o);i.attachEvent("onbeforeprint",function(){var b,d,g;g=a.styleSheets;for(var j=[],f=g.length,m=Array(f);f--;)m[f]=g[f];for(;g=m.pop();)if(!g.disabled&&
B.test(g.media)){try{b=g.imports;d=b.length}catch(C){d=0}for(f=0;f<d;f++)m.push(b[f]);try{j.push(g.cssText)}catch(D){}}b=j.reverse().join("").split("{");d=b.length;f=RegExp("(^|[\\s,>+~])("+p().join("|")+")(?=[[\\s,>+~#.:]|$)","gi");for(m="$1"+o+"\\:$2";d--;){j=b[d]=b[d].split("}");j[j.length-1]=j[j.length-1].replace(f,m);b[d]=j.join("}")}j=b.join("{");d=a.getElementsByTagName("*");f=d.length;m=RegExp("^(?:"+p().join("|")+")$","i");for(g=[];f--;){b=d[f];m.test(b.nodeName)&&g.push(b.applyElement(z(b)))}e=
g;c=t(a,j)});i.attachEvent("onafterprint",function(){for(var b=e,d=b.length;d--;)b[d].removeNode();c.removeNode(true)});a.printShived=true;return a}var s=n.html5||{},y=/^<|^(?:button|form|map|select|textarea|object|iframe)$/i,x=/^<|^(?:a|b|button|code|div|fieldset|form|h1|h2|h3|h4|h5|h6|i|iframe|img|input|label|li|link|ol|option|p|param|q|script|select|span|strong|style|table|tbody|td|textarea|tfoot|th|thead|tr|ul)$/i,q,r;(function(){var a=k.createElement("a");a.innerHTML="<xyz></xyz>";(q="hidden"in
a)&&typeof injectElementWithStyles=="function"&&injectElementWithStyles("#modernizr{}",function(c){c.hidden=true;q=(n.getComputedStyle?getComputedStyle(c,null):c.currentStyle).display=="none"});r=a.childNodes.length==1||function(){try{k.createElement("a")}catch(c){return true}var e=k.createDocumentFragment();return typeof e.cloneNode=="undefined"||typeof e.createDocumentFragment=="undefined"||typeof e.createElement=="undefined"}()})();var l={elements:s.elements||"abbr article aside audio bdi canvas data datalist details figcaption figure footer header hgroup mark meter nav output progress section summary time video",
shivCSS:s.shivCSS!==false,shivMethods:s.shivMethods!==false,type:"default",shivDocument:u};n.html5=l;u(k);var B=/^$|\b(?:all|print)\b/,o="html5shiv",A=!r&&function(){var a=k.documentElement;return!(typeof k.namespaces=="undefined"||typeof k.parentWindow=="undefined"||typeof a.applyElement=="undefined"||typeof a.removeNode=="undefined"||typeof n.attachEvent=="undefined")}();l.type+=" print";l.shivPrint=v;v(k)})(this,document);

478
public/javascripts/vendor/json2.js vendored
View File

@ -1,478 +0,0 @@
/*
http://www.JSON.org/json2.js
2009-04-16
Public Domain.
NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
See http://www.JSON.org/js.html
This file creates a global JSON object containing two methods: stringify
and parse.
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 '&nbsp;'),
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 object holding the key.
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.
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.
*/
/*jslint evil: true */
/*global JSON */
/*members "", "\b", "\t", "\n", "\f", "\r", "\"", 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 (!this.JSON) {
JSON = {};
}
(function () {
function f(n) {
// Format integers to have at least two digits.
return n < 10 ? '0' + n : n;
}
if (typeof Date.prototype.toJSON !== 'function') {
Date.prototype.toJSON = function (key) {
return this.getUTCFullYear() + '-' +
f(this.getUTCMonth() + 1) + '-' +
f(this.getUTCDate()) + 'T' +
f(this.getUTCHours()) + ':' +
f(this.getUTCMinutes()) + ':' +
f(this.getUTCSeconds()) + 'Z';
};
String.prototype.toJSON =
Number.prototype.toJSON =
Boolean.prototype.toJSON = function (key) {
return this.valueOf();
};
}
var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
gap,
indent,
meta = { // table of character substitutions
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
'\f': '\\f',
'\r': '\\r',
'"' : '\\"',
'\\': '\\\\'
},
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.
escapable.lastIndex = 0;
return escapable.test(string) ?
'"' + string.replace(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.
k, // The member key.
v, // The member value.
length,
mind = gap,
partial,
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) {
k = rep[i];
if (typeof k === 'string') {
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.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') {
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, v, value = holder[key];
if (value && typeof value === 'object') {
for (k in value) {
if (Object.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.
cx.lastIndex = 0;
if (cx.test(text)) {
text = text.replace(cx, 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 (/^[\],:{}\s]*$/.
test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
// 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');
};
}
}());