/*!
* jQuery BBQ: Back Button & Query Library - v1.2.1 - 2/17/2010
* http://benalman.com/projects/jquery-bbq-plugin/
*
* Copyright (c) 2010 "Cowboy" Ben Alman
* Dual licensed under the MIT and GPL licenses.
* http://benalman.com/about/license/
*/
// Script: jQuery BBQ: Back Button & Query Library
//
// *Version: 1.2.1, Last updated: 2/17/2010*
//
// Project Home - http://benalman.com/projects/jquery-bbq-plugin/
// GitHub - http://github.com/cowboy/jquery-bbq/
// Source - http://github.com/cowboy/jquery-bbq/raw/master/jquery.ba-bbq.js
// (Minified) - http://github.com/cowboy/jquery-bbq/raw/master/jquery.ba-bbq.min.js (4.0kb)
//
// About: License
//
// Copyright (c) 2010 "Cowboy" Ben Alman,
// Dual licensed under the MIT and GPL licenses.
// http://benalman.com/about/license/
//
// About: Examples
//
// These working examples, complete with fully commented code, illustrate a few
// ways in which this plugin can be used.
//
// Basic AJAX - http://benalman.com/code/projects/jquery-bbq/examples/fragment-basic/
// Advanced AJAX - http://benalman.com/code/projects/jquery-bbq/examples/fragment-advanced/
// jQuery UI Tabs - http://benalman.com/code/projects/jquery-bbq/examples/fragment-jquery-ui-tabs/
// Deparam - http://benalman.com/code/projects/jquery-bbq/examples/deparam/
//
// About: Support and Testing
//
// Information about what version or versions of jQuery this plugin has been
// tested with, what browsers it has been tested in, and where the unit tests
// reside (so you can test it yourself).
//
// jQuery Versions - 1.3.2, 1.4.1, 1.4.2
// Browsers Tested - Internet Explorer 6-8, Firefox 2-3.7, Safari 3-4,
// Chrome 4-5, Opera 9.6-10.1.
// Unit Tests - http://benalman.com/code/projects/jquery-bbq/unit/
//
// About: Release History
//
// 1.2.1 - (2/17/2010) Actually fixed the stale window.location Safari bug from
// <jQuery hashchange event> in BBQ, which was the main reason for the
// previous release!
// 1.2 - (2/16/2010) Integrated <jQuery hashchange event> v1.2, which fixes a
// Safari bug, the event can now be bound before DOM ready, and IE6/7
// page should no longer scroll when the event is first bound. Also
// added the <jQuery.param.fragment.noEscape> method, and reworked the
// <hashchange event (BBQ)> internal "add" method to be compatible with
// changes made to the jQuery 1.4.2 special events API.
// 1.1.1 - (1/22/2010) Integrated <jQuery hashchange event> v1.1, which fixes an
// obscure IE8 EmulateIE7 meta tag compatibility mode bug.
// 1.1 - (1/9/2010) Broke out the jQuery BBQ event.special <hashchange event>
// functionality into a separate plugin for users who want just the
// basic event & back button support, without all the extra awesomeness
// that BBQ provides. This plugin will be included as part of jQuery BBQ,
// but also be available separately. See <jQuery hashchange event>
// plugin for more information. Also added the <jQuery.bbq.removeState>
// method and added additional <jQuery.deparam> examples.
// 1.0.3 - (12/2/2009) Fixed an issue in IE 6 where location.search and
// location.hash would report incorrectly if the hash contained the ?
// character. Also <jQuery.param.querystring> and <jQuery.param.fragment>
// will no longer parse params out of a URL that doesn't contain ? or #,
// respectively.
// 1.0.2 - (10/10/2009) Fixed an issue in IE 6/7 where the hidden IFRAME caused
// a "This page contains both secure and nonsecure items." warning when
// used on an https:// page.
// 1.0.1 - (10/7/2009) Fixed an issue in IE 8. Since both "IE7" and "IE8
// Compatibility View" modes erroneously report that the browser
// supports the native window.onhashchange event, a slightly more
// robust test needed to be added.
// 1.0 - (10/2/2009) Initial release
(function($,window){
'$:nomunge'; // Used by YUI compressor.
// Some convenient shortcuts.
var undefined,
aps = Array.prototype.slice,
decode = decodeURIComponent,
// Method / object references.
jq_param = $.param,
jq_param_fragment,
jq_deparam,
jq_deparam_fragment,
jq_bbq = $.bbq = $.bbq || {},
jq_bbq_pushState,
jq_bbq_getState,
jq_elemUrlAttr,
jq_event_special = $.event.special,
// Reused strings.
str_hashchange = 'hashchange',
str_querystring = 'querystring',
str_fragment = 'fragment',
str_elemUrlAttr = 'elemUrlAttr',
str_location = 'location',
str_href = 'href',
str_src = 'src',
// Reused RegExp.
re_trim_querystring = /^.*\?|#.*$/g,
re_trim_fragment = /^.*\#/,
re_no_escape,
// Used by jQuery.elemUrlAttr.
elemUrlAttr_cache = {};
// A few commonly used bits, broken out to help reduce minified file size.
function is_string( arg ) {
return typeof arg === 'string';
};
// Why write the same function twice? Let's curry! Mmmm, curry..
function curry( func ) {
var args = aps.call( arguments, 1 );
return function() {
return func.apply( this, args.concat( aps.call( arguments ) ) );
};
};
// Get location.hash (or what you'd expect location.hash to be) sans any
// leading #. Thanks for making this necessary, Firefox!
function get_fragment( url ) {
return url.replace( /^[^#]*#?(.*)$/, '$1' );
};
// Get location.search (or what you'd expect location.search to be) sans any
// leading #. Thanks for making this necessary, IE6!
function get_querystring( url ) {
return url.replace( /(?:^[^?#]*\?([^#]*).*$)?.*/, '$1' );
};
// Section: Param (to string)
//
// Method: jQuery.param.querystring
//
// Retrieve the query string from a URL or if no arguments are passed, the
// current window.location.
//
// Usage:
//
// > jQuery.param.querystring( [ url ] );
//
// Arguments:
//
// url - (String) A URL containing query string params to be parsed. If url
// is not passed, the current window.location is used.
//
// Returns:
//
// (String) The parsed query string, with any leading "?" removed.
//
// Method: jQuery.param.querystring (build url)
//
// Merge a URL, with or without pre-existing query string params, plus any
// object, params string or URL containing query string params into a new URL.
//
// Usage:
//
// > jQuery.param.querystring( url, params [, merge_mode ] );
//
// Arguments:
//
// url - (String) A valid URL for params to be merged into. This URL may
// contain a query string and/or fragment (hash).
// params - (String) A params string or URL containing query string params to
// be merged into url.
// params - (Object) A params object to be merged into url.
// merge_mode - (Number) Merge behavior defaults to 0 if merge_mode is not
// specified, and is as-follows:
//
// * 0: params in the params argument will override any query string
// params in url.
// * 1: any query string params in url will override params in the params
// argument.
// * 2: params argument will completely replace any query string in url.
//
// Returns:
//
// (String) Either a params string with urlencoded data or a URL with a
// urlencoded query string in the format 'a=b&c=d&e=f'.
// Method: jQuery.param.fragment
//
// Retrieve the fragment (hash) from a URL or if no arguments are passed, the
// current window.location.
//
// Usage:
//
// > jQuery.param.fragment( [ url ] );
//
// Arguments:
//
// url - (String) A URL containing fragment (hash) params to be parsed. If
// url is not passed, the current window.location is used.
//
// Returns:
//
// (String) The parsed fragment (hash) string, with any leading "#" removed.
// Method: jQuery.param.fragment (build url)
//
// Merge a URL, with or without pre-existing fragment (hash) params, plus any
// object, params string or URL containing fragment (hash) params into a new
// URL.
//
// Usage:
//
// > jQuery.param.fragment( url, params [, merge_mode ] );
//
// Arguments:
//
// url - (String) A valid URL for params to be merged into. This URL may
// contain a query string and/or fragment (hash).
// params - (String) A params string or URL containing fragment (hash) params
// to be merged into url.
// params - (Object) A params object to be merged into url.
// merge_mode - (Number) Merge behavior defaults to 0 if merge_mode is not
// specified, and is as-follows:
//
// * 0: params in the params argument will override any fragment (hash)
// params in url.
// * 1: any fragment (hash) params in url will override params in the
// params argument.
// * 2: params argument will completely replace any query string in url.
//
// Returns:
//
// (String) Either a params string with urlencoded data or a URL with a
// urlencoded fragment (hash) in the format 'a=b&c=d&e=f'.
function jq_param_sub( is_fragment, get_func, url, params, merge_mode ) {
var result,
qs,
matches,
url_params,
hash;
if ( params !== undefined ) {
// Build URL by merging params into url string.
// matches[1] = url part that precedes params, not including trailing ?/#
// matches[2] = params, not including leading ?/#
// matches[3] = if in 'querystring' mode, hash including leading #, otherwise ''
matches = url.match( is_fragment ? /^([^#]*)\#?(.*)$/ : /^([^#?]*)\??([^#]*)(#?.*)/ );
// Get the hash if in 'querystring' mode, and it exists.
hash = matches[3] || '';
if ( merge_mode === 2 && is_string( params ) ) {
// If merge_mode is 2 and params is a string, merge the fragment / query
// string into the URL wholesale, without converting it into an object.
qs = params.replace( is_fragment ? re_trim_fragment : re_trim_querystring, '' );
} else {
// Convert relevant params in url to object.
url_params = jq_deparam( matches[2] );
params = is_string( params )
// Convert passed params string into object.
? jq_deparam[ is_fragment ? str_fragment : str_querystring ]( params )
// Passed params object.
: params;
qs = merge_mode === 2 ? params // passed params replace url params
: merge_mode === 1 ? $.extend( {}, params, url_params ) // url params override passed params
: $.extend( {}, url_params, params ); // passed params override url params
// Convert params object to a string.
qs = jq_param( qs );
// Unescape characters specified via $.param.noEscape. Since only hash-
// history users have requested this feature, it's only enabled for
// fragment-related params strings.
if ( is_fragment ) {
qs = qs.replace( re_no_escape, decode );
}
}
// Build URL from the base url, querystring and hash. In 'querystring'
// mode, ? is only added if a query string exists. In 'fragment' mode, #
// is always added.
result = matches[1] + ( is_fragment ? '#' : qs || !matches[1] ? '?' : '' ) + qs + hash;
} else {
// If URL was passed in, parse params from URL string, otherwise parse
// params from window.location.
result = get_func( url !== undefined ? url : window[ str_location ][ str_href ] );
}
return result;
};
jq_param[ str_querystring ] = curry( jq_param_sub, 0, get_querystring );
jq_param[ str_fragment ] = jq_param_fragment = curry( jq_param_sub, 1, get_fragment );
// Method: jQuery.param.fragment.noEscape
//
// Specify characters that will be left unescaped when fragments are created
// or merged using <jQuery.param.fragment>, or when the fragment is modified
// using <jQuery.bbq.pushState>. This option only applies to serialized data
// object fragments, and not set-as-string fragments. Does not affect the
// query string. Defaults to ",/" (comma, forward slash).
//
// Note that this is considered a purely aesthetic option, and will help to
// create URLs that "look pretty" in the address bar or bookmarks, without
// affecting functionality in any way. That being said, be careful to not
// unescape characters that are used as delimiters or serve a special
// purpose, such as the "#?&=+" (octothorpe, question mark, ampersand,
// equals, plus) characters.
//
// Usage:
//
// > jQuery.param.fragment.noEscape( [ chars ] );
//
// Arguments:
//
// chars - (String) The characters to not escape in the fragment. If
// unspecified, defaults to empty string (escape all characters).
//
// Returns:
//
// Nothing.
jq_param_fragment.noEscape = function( chars ) {
chars = chars || '';
var arr = $.map( chars.split(''), encodeURIComponent );
re_no_escape = new RegExp( arr.join('|'), 'g' );
};
// A sensible default. These are the characters people seem to complain about
// "uglifying up the URL" the most.
jq_param_fragment.noEscape( ',/' );
// Section: Deparam (from string)
//
// Method: jQuery.deparam
//
// Deserialize a params string into an object, optionally coercing numbers,
// booleans, null and undefined values; this method is the counterpart to the
// internal jQuery.param method.
//
// Usage:
//
// > jQuery.deparam( params [, coerce ] );
//
// Arguments:
//
// params - (String) A params string to be parsed.
// coerce - (Boolean) If true, coerces any numbers or true, false, null, and
// undefined to their actual value. Defaults to false if omitted.
//
// Returns:
//
// (Object) An object representing the deserialized params string.
$.deparam = jq_deparam = function( params, coerce ) {
var obj = {},
coerce_types = { 'true': !0, 'false': !1, 'null': null };
// Iterate over all name=value pairs.
$.each( params.replace( /\+/g, ' ' ).split( '&' ), function(j,v){
var param = v.split( '=' ),
key = decode( param[0] ),
val,
cur = obj,
i = 0,
// If key is more complex than 'foo', like 'a[]' or 'a[b][c]', split it
// into its component parts.
keys = key.split( '][' ),
keys_last = keys.length - 1;
// If the first keys part contains [ and the last ends with ], then []
// are correctly balanced.
if ( /\[/.test( keys[0] ) && /\]$/.test( keys[ keys_last ] ) ) {
// Remove the trailing ] from the last keys part.
keys[ keys_last ] = keys[ keys_last ].replace( /\]$/, '' );
// Split first keys part into two parts on the [ and add them back onto
// the beginning of the keys array.
keys = keys.shift().split('[').concat( keys );
keys_last = keys.length - 1;
} else {
// Basic 'foo' style key.
keys_last = 0;
}
// Are we dealing with a name=value pair, or just a name?
if ( param.length === 2 ) {
val = decode( param[1] );
// Coerce values.
if ( coerce ) {
val = val && !isNaN(val) ? +val // number
: val === 'undefined' ? undefined // undefined
: coerce_types[val] !== undefined ? coerce_types[val] // true, false, null
: val; // string
}
if ( keys_last ) {
// Complex key, build deep object structure based on a few rules:
// * The 'cur' pointer starts at the object top-level.
// * [] = array push (n is set to array length), [n] = array if n is
// numeric, otherwise object.
// * If at the last keys part, set the value.
// * For each keys part, if the current level is undefined create an
// object or array based on the type of the next keys part.
// * Move the 'cur' pointer to the next level.
// * Rinse & repeat.
for ( ; i <= keys_last; i++ ) {
key = keys[i] === '' ? cur.length : keys[i];
cur = cur[key] = i < keys_last
? cur[key] || ( keys[i+1] && isNaN( keys[i+1] ) ? {} : [] )
: val;
}
} else {
// Simple key, even simpler rules, since only scalars and shallow
// arrays are allowed.
if ( $.isArray( obj[key] ) ) {
// val is already an array, so push on the next value.
obj[key].push( val );
} else if ( obj[key] !== undefined ) {
// val isn't an array, but since a second value has been specified,
// convert val into an array.
obj[key] = [ obj[key], val ];
} else {
// val is a scalar.
obj[key] = val;
}
}
} else if ( key ) {
// No value was defined, so set something meaningful.
obj[key] = coerce
? undefined
: '';
}
});
return obj;
};
// Method: jQuery.deparam.querystring
//
// Parse the query string from a URL or the current window.location,
// deserializing it into an object, optionally coercing numbers, booleans,
// null and undefined values.
//
// Usage:
//
// > jQuery.deparam.querystring( [ url ] [, coerce ] );
//
// Arguments:
//
// url - (String) An optional params string or URL containing query string
// params to be parsed. If url is omitted, the current window.location
// is used.
// coerce - (Boolean) If true, coerces any numbers or true, false, null, and
// undefined to their actual value. Defaults to false if omitted.
//
// Returns:
//
// (Object) An object representing the deserialized params string.
// Method: jQuery.deparam.fragment
//
// Parse the fragment (hash) from a URL or the current window.location,
// deserializing it into an object, optionally coercing numbers, booleans,
// null and undefined values.
//
// Usage:
//
// > jQuery.deparam.fragment( [ url ] [, coerce ] );
//
// Arguments:
//
// url - (String) An optional params string or URL containing fragment (hash)
// params to be parsed. If url is omitted, the current window.location
// is used.
// coerce - (Boolean) If true, coerces any numbers or true, false, null, and
// undefined to their actual value. Defaults to false if omitted.
//
// Returns:
//
// (Object) An object representing the deserialized params string.
function jq_deparam_sub( is_fragment, url_or_params, coerce ) {
if ( url_or_params === undefined || typeof url_or_params === 'boolean' ) {
// url_or_params not specified.
coerce = url_or_params;
url_or_params = jq_param[ is_fragment ? str_fragment : str_querystring ]();
} else {
url_or_params = is_string( url_or_params )
? url_or_params.replace( is_fragment ? re_trim_fragment : re_trim_querystring, '' )
: url_or_params;
}
return jq_deparam( url_or_params, coerce );
};
jq_deparam[ str_querystring ] = curry( jq_deparam_sub, 0 );
jq_deparam[ str_fragment ] = jq_deparam_fragment = curry( jq_deparam_sub, 1 );
// Section: Element manipulation
//
// Method: jQuery.elemUrlAttr
//
// Get the internal "Default URL attribute per tag" list, or augment the list
// with additional tag-attribute pairs, in case the defaults are insufficient.
//
// In the <jQuery.fn.querystring> and <jQuery.fn.fragment> methods, this list
// is used to determine which attribute contains the URL to be modified, if
// an "attr" param is not specified.
//
// Default Tag-Attribute List:
//
// a - href
// base - href
// iframe - src
// img - src
// input - src
// form - action
// link - href
// script - src
//
// Usage:
//
// > jQuery.elemUrlAttr( [ tag_attr ] );
//
// Arguments:
//
// tag_attr - (Object) An object containing a list of tag names and their
// associated default attribute names in the format { tag: 'attr', ... } to
// be merged into the internal tag-attribute list.
//
// Returns:
//
// (Object) An object containing all stored tag-attribute values.
// Only define function and set defaults if function doesn't already exist, as
// the urlInternal plugin will provide this method as well.
$[ str_elemUrlAttr ] || ($[ str_elemUrlAttr ] = function( obj ) {
return $.extend( elemUrlAttr_cache, obj );
})({
a: str_href,
base: str_href,
iframe: str_src,
img: str_src,
input: str_src,
form: 'action',
link: str_href,
script: str_src
});
jq_elemUrlAttr = $[ str_elemUrlAttr ];
// Method: jQuery.fn.querystring
//
// Update URL attribute in one or more elements, merging the current URL (with
// or without pre-existing query string params) plus any params object or
// string into a new URL, which is then set into that attribute. Like
// <jQuery.param.querystring (build url)>, but for all elements in a jQuery
// collection.
//
// Usage:
//
// > jQuery('selector').querystring( [ attr, ] params [, merge_mode ] );
//
// Arguments:
//
// attr - (String) Optional name of an attribute that will contain a URL to
// merge params or url into. See <jQuery.elemUrlAttr> for a list of default
// attributes.
// params - (Object) A params object to be merged into the URL attribute.
// params - (String) A URL containing query string params, or params string
// to be merged into the URL attribute.
// merge_mode - (Number) Merge behavior defaults to 0 if merge_mode is not
// specified, and is as-follows:
//
// * 0: params in the params argument will override any params in attr URL.
// * 1: any params in attr URL will override params in the params argument.
// * 2: params argument will completely replace any query string in attr
// URL.
//
// Returns:
//
// (jQuery) The initial jQuery collection of elements, but with modified URL
// attribute values.
// Method: jQuery.fn.fragment
//
// Update URL attribute in one or more elements, merging the current URL (with
// or without pre-existing fragment/hash params) plus any params object or
// string into a new URL, which is then set into that attribute. Like
// <jQuery.param.fragment (build url)>, but for all elements in a jQuery
// collection.
//
// Usage:
//
// > jQuery('selector').fragment( [ attr, ] params [, merge_mode ] );
//
// Arguments:
//
// attr - (String) Optional name of an attribute that will contain a URL to
// merge params into. See <jQuery.elemUrlAttr> for a list of default
// attributes.
// params - (Object) A params object to be merged into the URL attribute.
// params - (String) A URL containing fragment (hash) params, or params
// string to be merged into the URL attribute.
// merge_mode - (Number) Merge behavior defaults to 0 if merge_mode is not
// specified, and is as-follows:
//
// * 0: params in the params argument will override any params in attr URL.
// * 1: any params in attr URL will override params in the params argument.
// * 2: params argument will completely replace any fragment (hash) in attr
// URL.
//
// Returns:
//
// (jQuery) The initial jQuery collection of elements, but with modified URL
// attribute values.
function jq_fn_sub( mode, force_attr, params, merge_mode ) {
if ( !is_string( params ) && typeof params !== 'object' ) {
// force_attr not specified.
merge_mode = params;
params = force_attr;
force_attr = undefined;
}
return this.each(function(){
var that = $(this),
// Get attribute specified, or default specified via $.elemUrlAttr.
attr = force_attr || jq_elemUrlAttr()[ ( this.nodeName || '' ).toLowerCase() ] || '',
// Get URL value.
url = attr && that.attr( attr ) || '';
// Update attribute with new URL.
that.attr( attr, jq_param[ mode ]( url, params, merge_mode ) );
});
};
$.fn[ str_querystring ] = curry( jq_fn_sub, str_querystring );
$.fn[ str_fragment ] = curry( jq_fn_sub, str_fragment );
// Section: History, hashchange event
//
// Method: jQuery.bbq.pushState
//
// Adds a 'state' into the browser history at the current position, setting
// location.hash and triggering any bound <hashchange event> callbacks
// (provided the new state is different than the previous state).
//
// If no arguments are passed, an empty state is created, which is just a
// shortcut for jQuery.bbq.pushState( {}, 2 ).
//
// Usage:
//
// > jQuery.bbq.pushState( [ params [, merge_mode ] ] );
//
// Arguments:
//
// params - (String) A serialized params string or a hash string beginning
// with # to merge into location.hash.
// params - (Object) A params object to merge into location.hash.
// merge_mode - (Number) Merge behavior defaults to 0 if merge_mode is not
// specified (unless a hash string beginning with # is specified, in which
// case merge behavior defaults to 2), and is as-follows:
//
// * 0: params in the params argument will override any params in the
// current state.
// * 1: any params in the current state will override params in the params
// argument.
// * 2: params argument will completely replace current state.
//
// Returns:
//
// Nothing.
//
// Additional Notes:
//
// * Setting an empty state may cause the browser to scroll.
// * Unlike the fragment and querystring methods, if a hash string beginning
// with # is specified as the params agrument, merge_mode defaults to 2.
jq_bbq.pushState = jq_bbq_pushState = function( params, merge_mode ) {
if ( is_string( params ) && /^#/.test( params ) && merge_mode === undefined ) {
// Params string begins with # and merge_mode not specified, so completely
// overwrite window.location.hash.
merge_mode = 2;
}
var has_args = params !== undefined,
// Merge params into window.location using $.param.fragment.
url = jq_param_fragment( window[ str_location ][ str_href ],
has_args ? params : {}, has_args ? merge_mode : 2 );
// Set new window.location.href. If hash is empty, use just # to prevent
// browser from reloading the page. Note that Safari 3 & Chrome barf on
// location.hash = '#'.
window[ str_location ][ str_href ] = url + ( /#/.test( url ) ? '' : '#' );
};
// Method: jQuery.bbq.getState
//
// Retrieves the current 'state' from the browser history, parsing
// location.hash for a specific key or returning an object containing the
// entire state, optionally coercing numbers, booleans, null and undefined
// values.
//
// Usage:
//
// > jQuery.bbq.getState( [ key ] [, coerce ] );
//
// Arguments:
//
// key - (String) An optional state key for which to return a value.
// coerce - (Boolean) If true, coerces any numbers or true, false, null, and
// undefined to their actual value. Defaults to false.
//
// Returns:
//
// (Anything) If key is passed, returns the value corresponding with that key
// in the location.hash 'state', or undefined. If not, an object
// representing the entire 'state' is returned.
jq_bbq.getState = jq_bbq_getState = function( key, coerce ) {
return key === undefined || typeof key === 'boolean'
? jq_deparam_fragment( key ) // 'key' really means 'coerce' here
: jq_deparam_fragment( coerce )[ key ];
};
// Method: jQuery.bbq.removeState
//
// Remove one or more keys from the current browser history 'state', creating
// a new state, setting location.hash and triggering any bound
// <hashchange event> callbacks (provided the new state is different than
// the previous state).
//
// If no arguments are passed, an empty state is created, which is just a
// shortcut for jQuery.bbq.pushState( {}, 2 ).
//
// Usage:
//
// > jQuery.bbq.removeState( [ key [, key ... ] ] );
//
// Arguments:
//
// key - (String) One or more key values to remove from the current state,
// passed as individual arguments.
// key - (Array) A single array argument that contains a list of key values
// to remove from the current state.
//
// Returns:
//
// Nothing.
//
// Additional Notes:
//
// * Setting an empty state may cause the browser to scroll.
jq_bbq.removeState = function( arr ) {
var state = {};
// If one or more arguments is passed..
if ( arr !== undefined ) {
// Get the current state.
state = jq_bbq_getState();
// For each passed key, delete the corresponding property from the current
// state.
$.each( $.isArray( arr ) ? arr : arguments, function(i,v){
delete state[ v ];
});
}
// Set the state, completely overriding any existing state.
jq_bbq_pushState( state, 2 );
};
// Event: hashchange event (BBQ)
//
// Usage in jQuery 1.4 and newer:
//
// In jQuery 1.4 and newer, the event object passed into any hashchange event
// callback is augmented with a copy of the location.hash fragment at the time
// the event was triggered as its event.fragment property. In addition, the
// event.getState method operates on this property (instead of location.hash)
// which allows this fragment-as-a-state to be referenced later, even after
// window.location may have changed.
//
// Note that event.fragment and event.getState are not defined according to
// W3C (or any other) specification, but will still be available whether or
// not the hashchange event exists natively in the browser, because of the
// utility they provide.
//
// The event.fragment property contains the output of <jQuery.param.fragment>
// and the event.getState method is equivalent to the <jQuery.bbq.getState>
// method.
//
// > $(window).bind( 'hashchange', function( event ) {
// > var hash_str = event.fragment,
// > param_obj = event.getState(),
// > param_val = event.getState( 'param_name' ),
// > param_val_coerced = event.getState( 'param_name', true );
// > ...
// > });
//
// Usage in jQuery 1.3.2:
//
// In jQuery 1.3.2, the event object cannot to be augmented as in jQuery 1.4+,
// so the fragment state isn't bound to the event object and must instead be
// parsed using the <jQuery.param.fragment> and <jQuery.bbq.getState> methods.
//
// > $(window).bind( 'hashchange', function( event ) {
// > var hash_str = $.param.fragment(),
// > param_obj = $.bbq.getState(),
// > param_val = $.bbq.getState( 'param_name' ),
// > param_val_coerced = $.bbq.getState( 'param_name', true );
// > ...
// > });
//
// Additional Notes:
//
// * Due to changes in the special events API, jQuery BBQ v1.2 or newer is
// required to enable the augmented event object in jQuery 1.4.2 and newer.
// * See <jQuery hashchange event> for more detailed information.
jq_event_special[ str_hashchange ] = $.extend( jq_event_special[ str_hashchange ], {
// Augmenting the event object with the .fragment property and .getState
// method requires jQuery 1.4 or newer. Note: with 1.3.2, everything will
// work, but the event won't be augmented)
add: function( handleObj ) {
var old_handler;
function new_handler(e) {
// e.fragment is set to the value of location.hash (with any leading #
// removed) at the time the event is triggered.
var hash = e[ str_fragment ] = jq_param_fragment();
// e.getState() works just like $.bbq.getState(), but uses the
// e.fragment property stored on the event object.
e.getState = function( key, coerce ) {
return key === undefined || typeof key === 'boolean'
? jq_deparam( hash, key ) // 'key' really means 'coerce' here
: jq_deparam( hash, coerce )[ key ];
};
old_handler.apply( this, arguments );
};
// This may seem a little complicated, but it normalizes the special event
// .add method between jQuery 1.4/1.4.1 and 1.4.2+
if ( $.isFunction( handleObj ) ) {
// 1.4, 1.4.1
old_handler = handleObj;
return new_handler;
} else {
// 1.4.2+
old_handler = handleObj.handler;
handleObj.handler = new_handler;
}
}
});
})(jQuery,this);
/*!
* jQuery hashchange event - v1.2 - 2/11/2010
* http://benalman.com/projects/jquery-hashchange-plugin/
*
* Copyright (c) 2010 "Cowboy" Ben Alman
* Dual licensed under the MIT and GPL licenses.
* http://benalman.com/about/license/
*/
// Script: jQuery hashchange event
//
// *Version: 1.2, Last updated: 2/11/2010*
//
// Project Home - http://benalman.com/projects/jquery-hashchange-plugin/
// GitHub - http://github.com/cowboy/jquery-hashchange/
// Source - http://github.com/cowboy/jquery-hashchange/raw/master/jquery.ba-hashchange.js
// (Minified) - http://github.com/cowboy/jquery-hashchange/raw/master/jquery.ba-hashchange.min.js (1.1kb)
//
// About: License
//
// Copyright (c) 2010 "Cowboy" Ben Alman,
// Dual licensed under the MIT and GPL licenses.
// http://benalman.com/about/license/
//
// About: Examples
//
// This working example, complete with fully commented code, illustrate one way
// in which this plugin can be used.
//
// hashchange event - http://benalman.com/code/projects/jquery-hashchange/examples/hashchange/
//
// About: Support and Testing
//
// Information about what version or versions of jQuery this plugin has been
// tested with, what browsers it has been tested in, and where the unit tests
// reside (so you can test it yourself).
//
// jQuery Versions - 1.3.2, 1.4.1, 1.4.2
// Browsers Tested - Internet Explorer 6-8, Firefox 2-3.7, Safari 3-4, Chrome, Opera 9.6-10.1.
// Unit Tests - http://benalman.com/code/projects/jquery-hashchange/unit/
//
// About: Known issues
//
// While this jQuery hashchange event implementation is quite stable and robust,
// there are a few unfortunate browser bugs surrounding expected hashchange
// event-based behaviors, independent of any JavaScript window.onhashchange
// abstraction. See the following examples for more information:
//
// Chrome: Back Button - http://benalman.com/code/projects/jquery-hashchange/examples/bug-chrome-back-button/
// Firefox: Remote XMLHttpRequest - http://benalman.com/code/projects/jquery-hashchange/examples/bug-firefox-remote-xhr/
// WebKit: Back Button in an Iframe - http://benalman.com/code/projects/jquery-hashchange/examples/bug-webkit-hash-iframe/
// Safari: Back Button from a different domain - http://benalman.com/code/projects/jquery-hashchange/examples/bug-safari-back-from-diff-domain/
//
// About: Release History
//
// 1.2 - (2/11/2010) Fixed a bug where coming back to a page using this plugin
// from a page on another domain would cause an error in Safari 4. Also,
// IE6/7 Iframe is now inserted after the body (this actually works),
// which prevents the page from scrolling when the event is first bound.
// Event can also now be bound before DOM ready, but it won't be usable
// before then in IE6/7.
// 1.1 - (1/21/2010) Incorporated document.documentMode test to fix IE8 bug
// where browser version is incorrectly reported as 8.0, despite
// inclusion of the X-UA-Compatible IE=EmulateIE7 meta tag.
// 1.0 - (1/9/2010) Initial Release. Broke out the jQuery BBQ event.special
// window.onhashchange functionality into a separate plugin for users
// who want just the basic event & back button support, without all the
// extra awesomeness that BBQ provides. This plugin will be included as
// part of jQuery BBQ, but also be available separately.
(function($,window,undefined){
'$:nomunge'; // Used by YUI compressor.
// Method / object references.
var fake_onhashchange,
jq_event_special = $.event.special,
// Reused strings.
str_location = 'location',
str_hashchange = 'hashchange',
str_href = 'href',
// IE6/7 specifically need some special love when it comes to back-button
// support, so let's do a little browser sniffing..
browser = $.browser,
mode = document.documentMode,
is_old_ie = browser.msie && ( mode === undefined || mode < 8 ),
// Does the browser support window.onhashchange? Test for IE version, since
// IE8 incorrectly reports this when in "IE7" or "IE8 Compatibility View"!
supports_onhashchange = 'on' + str_hashchange in window && !is_old_ie;
// Get location.hash (or what you'd expect location.hash to be) sans any
// leading #. Thanks for making this necessary, Firefox!
function get_fragment( url ) {
url = url || window[ str_location ][ str_href ];
return url.replace( /^[^#]*#?(.*)$/, '$1' );
};
// Property: jQuery.hashchangeDelay
//
// The numeric interval (in milliseconds) at which the <hashchange event>
// polling loop executes. Defaults to 100.
$[ str_hashchange + 'Delay' ] = 100;
// Event: hashchange event
//
// Fired when location.hash changes. In browsers that support it, the native
// window.onhashchange event is used (IE8, FF3.6), otherwise a polling loop is
// initialized, running every <jQuery.hashchangeDelay> milliseconds to see if
// the hash has changed. In IE 6 and 7, a hidden Iframe is created to allow
// the back button and hash-based history to work.
//
// Usage:
//
// > $(window).bind( 'hashchange', function(e) {
// > var hash = location.hash;
// > ...
// > });
//
// Additional Notes:
//
// * The polling loop and Iframe are not created until at least one callback
// is actually bound to 'hashchange'.
// * If you need the bound callback(s) to execute immediately, in cases where
// the page 'state' exists on page load (via bookmark or page refresh, for
// example) use $(window).trigger( 'hashchange' );
// * The event can be bound before DOM ready, but since it won't be usable
// before then in IE6/7 (due to the necessary Iframe), recommended usage is
// to bind it inside a $(document).ready() callback.
jq_event_special[ str_hashchange ] = $.extend( jq_event_special[ str_hashchange ], {
// Called only when the first 'hashchange' event is bound to window.
setup: function() {
// If window.onhashchange is supported natively, there's nothing to do..
if ( supports_onhashchange ) { return false; }
// Otherwise, we need to create our own. And we don't want to call this
// until the user binds to the event, just in case they never do, since it
// will create a polling loop and possibly even a hidden Iframe.
$( fake_onhashchange.start );
},
// Called only when the last 'hashchange' event is unbound from window.
teardown: function() {
// If window.onhashchange is supported natively, there's nothing to do..
if ( supports_onhashchange ) { return false; }
// Otherwise, we need to stop ours (if possible).
$( fake_onhashchange.stop );
}
});
// fake_onhashchange does all the work of triggering the window.onhashchange
// event for browsers that don't natively support it, including creating a
// polling loop to watch for hash changes and in IE 6/7 creating a hidden
// Iframe to enable back and forward.
fake_onhashchange = (function(){
var self = {},
timeout_id,
iframe,
set_history,
get_history;
// Initialize. In IE 6/7, creates a hidden Iframe for history handling.
function init(){
// Most browsers don't need special methods here..
set_history = get_history = function(val){ return val; };
// But IE6/7 do!
if ( is_old_ie ) {
// Create hidden Iframe after the end of the body to prevent initial
// page load from scrolling unnecessarily.
iframe = $('<iframe src="javascript:0"/>').hide().insertAfter( 'body' )[0].contentWindow;
// Get history by looking at the hidden Iframe's location.hash.
get_history = function() {
return get_fragment( iframe.document[ str_location ][ str_href ] );
};
// Set a new history item by opening and then closing the Iframe
// document, *then* setting its location.hash.
set_history = function( hash, history_hash ) {
if ( hash !== history_hash ) {
var doc = iframe.document;
doc.open().close();
doc[ str_location ].hash = '#' + hash;
}
};
// Set initial history.
set_history( get_fragment() );
}
};
// Start the polling loop.
self.start = function() {
// Polling loop is already running!
if ( timeout_id ) { return; }
// Remember the initial hash so it doesn't get triggered immediately.
var last_hash = get_fragment();
// Initialize if not yet initialized.
set_history || init();
// This polling loop checks every $.hashchangeDelay milliseconds to see if
// location.hash has changed, and triggers the 'hashchange' event on
// window when necessary.
(function loopy(){
var hash = get_fragment(),
history_hash = get_history( last_hash );
if ( hash !== last_hash ) {
set_history( last_hash = hash, history_hash );
$(window).trigger( str_hashchange );
} else if ( history_hash !== last_hash ) {
window[ str_location ][ str_href ] = window[ str_location ][ str_href ].replace( /#.*/, '' ) + '#' + history_hash;
}
timeout_id = setTimeout( loopy, $[ str_hashchange + 'Delay' ] );
})();
};
// Stop the polling loop, but only if an IE6/7 Iframe wasn't created. In
// that case, even if there are no longer any bound event handlers, the
// polling loop is still necessary for back/next to work at all!
self.stop = function() {
if ( !iframe ) {
timeout_id && clearTimeout( timeout_id );
timeout_id = 0;
}
};
return self;
})();
})(jQuery,this);