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jquery.mobile.navigation.js
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jquery.mobile.navigation.js
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//>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
//>>description: Applies the AJAX navigation system to links and forms to enable page transitions
//>>label: AJAX Navigation System
//>>group: Navigation
define( [
"jquery",
"./jquery.mobile.core",
"./navigation/path",
"./navigation/navigate",
"./jquery.mobile.events",
"./jquery.mobile.support",
"depend!./jquery.hashchange[jquery]",
"./widgets/page",
"./jquery.mobile.transition" ], function( $ ) {
//>>excludeEnd("jqmBuildExclude");
(function( $, undefined ) {
//define vars for interal use
var $window = $( window ),
$html = $( 'html' ),
$head = $( 'head' ),
path = $.mobile.path,
//will be defined when a link is clicked and given an active class
$activeClickedLink = null,
// resolved on domready
domreadyDeferred = $.Deferred(),
//urlHistory is purely here to make guesses at whether the back or forward button was clicked
//and provide an appropriate transition
urlHistory = $.navigate.history,
//define first selector to receive focus when a page is shown
focusable = "[tabindex],a,button:visible,select:visible,input",
//queue to hold simultanious page transitions
pageTransitionQueue = [],
//indicates whether or not page is in process of transitioning
isPageTransitioning = false,
//nonsense hash change key for dialogs, so they create a history entry
dialogHashKey = "&ui-state=dialog",
//existing base tag?
$base = $head.children( "base" ),
//tuck away the original document URL minus any fragment.
documentUrl = path.parseLocation(),
//if the document has an embedded base tag, documentBase is set to its
//initial value. If a base tag does not exist, then we default to the documentUrl.
documentBase = $base.length ? path.parseUrl( path.makeUrlAbsolute( $base.attr( "href" ), documentUrl.href ) ) : documentUrl,
//cache the comparison once.
documentBaseDiffers = ( documentUrl.hrefNoHash !== documentBase.hrefNoHash ),
getScreenHeight = $.mobile.getScreenHeight;
//base element management, defined depending on dynamic base tag support
var base = $.support.dynamicBaseTag ? {
//define base element, for use in routing asset urls that are referenced in Ajax-requested markup
element: ( $base.length ? $base : $( "<base>", { href: documentBase.hrefNoHash } ).prependTo( $head ) ),
//set the generated BASE element's href attribute to a new page's base path
set: function( href ) {
href = path.parseUrl(href).hrefNoHash;
base.element.attr( "href", path.makeUrlAbsolute( href, documentBase ) );
},
//set the generated BASE element's href attribute to a new page's base path
reset: function() {
base.element.attr( "href", documentBase.hrefNoSearch );
}
} : undefined;
/* internal utility functions */
// NOTE Issue #4950 Android phonegap doesn't navigate back properly
// when a full page refresh has taken place. It appears that hashchange
// and replacestate history alterations work fine but we need to support
// both forms of history traversal in our code that uses backward history
// movement
$.mobile.back = function() {
var nav = window.navigator;
// if the setting is on and the navigator object is
// available use the phonegap navigation capability
if( this.phonegapNavigationEnabled &&
nav &&
nav.app &&
nav.app.backHistory ){
nav.app.backHistory();
} else {
window.history.back();
}
};
//direct focus to the page title, or otherwise first focusable element
$.mobile.focusPage = function ( page ) {
var autofocus = page.find( "[autofocus]" ),
pageTitle = page.find( ".ui-title:eq(0)" );
if ( autofocus.length ) {
autofocus.focus();
return;
}
if ( pageTitle.length ) {
pageTitle.focus();
} else{
page.focus();
}
};
//remove active classes after page transition or error
function removeActiveLinkClass( forceRemoval ) {
if ( !!$activeClickedLink && ( !$activeClickedLink.closest( "." + $.mobile.activePageClass ).length || forceRemoval ) ) {
$activeClickedLink.removeClass( $.mobile.activeBtnClass );
}
$activeClickedLink = null;
}
function releasePageTransitionLock() {
isPageTransitioning = false;
if ( pageTransitionQueue.length > 0 ) {
$.mobile.changePage.apply( null, pageTransitionQueue.pop() );
}
}
// Save the last scroll distance per page, before it is hidden
var setLastScrollEnabled = true,
setLastScroll, delayedSetLastScroll;
setLastScroll = function() {
// this barrier prevents setting the scroll value based on the browser
// scrolling the window based on a hashchange
if ( !setLastScrollEnabled ) {
return;
}
var active = $.mobile.urlHistory.getActive();
if ( active ) {
var lastScroll = $window.scrollTop();
// Set active page's lastScroll prop.
// If the location we're scrolling to is less than minScrollBack, let it go.
active.lastScroll = lastScroll < $.mobile.minScrollBack ? $.mobile.defaultHomeScroll : lastScroll;
}
};
// bind to scrollstop to gather scroll position. The delay allows for the hashchange
// event to fire and disable scroll recording in the case where the browser scrolls
// to the hash targets location (sometimes the top of the page). once pagechange fires
// getLastScroll is again permitted to operate
delayedSetLastScroll = function() {
setTimeout( setLastScroll, 100 );
};
// disable an scroll setting when a hashchange has been fired, this only works
// because the recording of the scroll position is delayed for 100ms after
// the browser might have changed the position because of the hashchange
$window.bind( $.support.pushState ? "popstate" : "hashchange", function() {
setLastScrollEnabled = false;
});
// handle initial hashchange from chrome :(
$window.one( $.support.pushState ? "popstate" : "hashchange", function() {
setLastScrollEnabled = true;
});
// wait until the mobile page container has been determined to bind to pagechange
$window.one( "pagecontainercreate", function() {
// once the page has changed, re-enable the scroll recording
$.mobile.pageContainer.bind( "pagechange", function() {
setLastScrollEnabled = true;
// remove any binding that previously existed on the get scroll
// which may or may not be different than the scroll element determined for
// this page previously
$window.unbind( "scrollstop", delayedSetLastScroll );
// determine and bind to the current scoll element which may be the window
// or in the case of touch overflow the element with touch overflow
$window.bind( "scrollstop", delayedSetLastScroll );
});
});
// bind to scrollstop for the first page as "pagechange" won't be fired in that case
$window.bind( "scrollstop", delayedSetLastScroll );
// No-op implementation of transition degradation
$.mobile._maybeDegradeTransition = $.mobile._maybeDegradeTransition || function( transition ) {
return transition;
};
//function for transitioning between two existing pages
function transitionPages( toPage, fromPage, transition, reverse ) {
if ( fromPage ) {
//trigger before show/hide events
fromPage.data( "mobile-page" )._trigger( "beforehide", null, { nextPage: toPage } );
}
toPage.data( "mobile-page" )._trigger( "beforeshow", null, { prevPage: fromPage || $( "" ) } );
//clear page loader
$.mobile.hidePageLoadingMsg();
transition = $.mobile._maybeDegradeTransition( transition );
//find the transition handler for the specified transition. If there
//isn't one in our transitionHandlers dictionary, use the default one.
//call the handler immediately to kick-off the transition.
var th = $.mobile.transitionHandlers[ transition || "default" ] || $.mobile.defaultTransitionHandler,
promise = th( transition, reverse, toPage, fromPage );
promise.done(function() {
//trigger show/hide events
if ( fromPage ) {
fromPage.data( "mobile-page" )._trigger( "hide", null, { nextPage: toPage } );
}
//trigger pageshow, define prevPage as either fromPage or empty jQuery obj
toPage.data( "mobile-page" )._trigger( "show", null, { prevPage: fromPage || $( "" ) } );
});
return promise;
}
//simply set the active page's minimum height to screen height, depending on orientation
function resetActivePageHeight() {
var aPage = $( "." + $.mobile.activePageClass ),
aPagePadT = parseFloat( aPage.css( "padding-top" ) ),
aPagePadB = parseFloat( aPage.css( "padding-bottom" ) ),
aPageBorderT = parseFloat( aPage.css( "border-top-width" ) ),
aPageBorderB = parseFloat( aPage.css( "border-bottom-width" ) );
aPage.css( "min-height", getScreenHeight() - aPagePadT - aPagePadB - aPageBorderT - aPageBorderB );
}
//shared page enhancements
function enhancePage( $page, role ) {
// If a role was specified, make sure the data-role attribute
// on the page element is in sync.
if ( role ) {
$page.attr( "data-" + $.mobile.ns + "role", role );
}
//run page plugin
$page.page();
}
// determine the current base url
function findBaseWithDefault() {
var closestBase = ( $.mobile.activePage && getClosestBaseUrl( $.mobile.activePage ) );
return closestBase || documentBase.hrefNoHash;
}
/* exposed $.mobile methods */
//animation complete callback
$.fn.animationComplete = function( callback ) {
if ( $.support.cssTransitions ) {
return $( this ).one( 'webkitAnimationEnd animationend', callback );
}
else{
// defer execution for consistency between webkit/non webkit
setTimeout( callback, 0 );
return $( this );
}
};
//expose path object on $.mobile
$.mobile.path = path;
//expose base object on $.mobile
$.mobile.base = base;
//history stack
$.mobile.urlHistory = urlHistory;
$.mobile.dialogHashKey = dialogHashKey;
//enable cross-domain page support
$.mobile.allowCrossDomainPages = false;
//return the original document url
$.mobile.getDocumentUrl = function( asParsedObject ) {
return asParsedObject ? $.extend( {}, documentUrl ) : documentUrl.href;
};
//return the original document base url
$.mobile.getDocumentBase = function( asParsedObject ) {
return asParsedObject ? $.extend( {}, documentBase ) : documentBase.href;
};
$.mobile._bindPageRemove = function() {
var page = $( this );
// when dom caching is not enabled or the page is embedded bind to remove the page on hide
if ( !page.data( "mobile-page" ).options.domCache &&
page.is( ":jqmData(external-page='true')" ) ) {
page.bind( 'pagehide.remove', function( e ) {
var $this = $( this ),
prEvent = new $.Event( "pageremove" );
$this.trigger( prEvent );
if ( !prEvent.isDefaultPrevented() ) {
$this.removeWithDependents();
}
});
}
};
// Load a page into the DOM.
$.mobile.loadPage = function( url, options ) {
// This function uses deferred notifications to let callers
// know when the page is done loading, or if an error has occurred.
var deferred = $.Deferred(),
// The default loadPage options with overrides specified by
// the caller.
settings = $.extend( {}, $.mobile.loadPage.defaults, options ),
// The DOM element for the page after it has been loaded.
page = null,
// If the reloadPage option is true, and the page is already
// in the DOM, dupCachedPage will be set to the page element
// so that it can be removed after the new version of the
// page is loaded off the network.
dupCachedPage = null,
// The absolute version of the URL passed into the function. This
// version of the URL may contain dialog/subpage params in it.
absUrl = path.makeUrlAbsolute( url, findBaseWithDefault() );
// If the caller provided data, and we're using "get" request,
// append the data to the URL.
if ( settings.data && settings.type === "get" ) {
absUrl = path.addSearchParams( absUrl, settings.data );
settings.data = undefined;
}
// If the caller is using a "post" request, reloadPage must be true
if ( settings.data && settings.type === "post" ) {
settings.reloadPage = true;
}
// The absolute version of the URL minus any dialog/subpage params.
// In otherwords the real URL of the page to be loaded.
var fileUrl = path.getFilePath( absUrl ),
// The version of the Url actually stored in the data-url attribute of
// the page. For embedded pages, it is just the id of the page. For pages
// within the same domain as the document base, it is the site relative
// path. For cross-domain pages (Phone Gap only) the entire absolute Url
// used to load the page.
dataUrl = path.convertUrlToDataUrl( absUrl );
// Make sure we have a pageContainer to work with.
settings.pageContainer = settings.pageContainer || $.mobile.pageContainer;
// Check to see if the page already exists in the DOM.
// NOTE do _not_ use the :jqmData psuedo selector because parenthesis
// are a valid url char and it breaks on the first occurence
page = settings.pageContainer.children( "[data-" + $.mobile.ns +"url='" + dataUrl + "']" );
// If we failed to find the page, check to see if the url is a
// reference to an embedded page. If so, it may have been dynamically
// injected by a developer, in which case it would be lacking a data-url
// attribute and in need of enhancement.
if ( page.length === 0 && dataUrl && !path.isPath( dataUrl ) ) {
page = settings.pageContainer.children( "#" + dataUrl )
.attr( "data-" + $.mobile.ns + "url", dataUrl )
.jqmData( "url", dataUrl );
}
// If we failed to find a page in the DOM, check the URL to see if it
// refers to the first page in the application. If it isn't a reference
// to the first page and refers to non-existent embedded page, error out.
if ( page.length === 0 ) {
if ( $.mobile.firstPage && path.isFirstPageUrl( fileUrl ) ) {
// Check to make sure our cached-first-page is actually
// in the DOM. Some user deployed apps are pruning the first
// page from the DOM for various reasons, we check for this
// case here because we don't want a first-page with an id
// falling through to the non-existent embedded page error
// case. If the first-page is not in the DOM, then we let
// things fall through to the ajax loading code below so
// that it gets reloaded.
if ( $.mobile.firstPage.parent().length ) {
page = $( $.mobile.firstPage );
}
} else if ( path.isEmbeddedPage( fileUrl ) ) {
deferred.reject( absUrl, options );
return deferred.promise();
}
}
// If the page we are interested in is already in the DOM,
// and the caller did not indicate that we should force a
// reload of the file, we are done. Otherwise, track the
// existing page as a duplicated.
if ( page.length ) {
if ( !settings.reloadPage ) {
enhancePage( page, settings.role );
deferred.resolve( absUrl, options, page );
return deferred.promise();
}
dupCachedPage = page;
}
var mpc = settings.pageContainer,
pblEvent = new $.Event( "pagebeforeload" ),
triggerData = { url: url, absUrl: absUrl, dataUrl: dataUrl, deferred: deferred, options: settings };
// Let listeners know we're about to load a page.
mpc.trigger( pblEvent, triggerData );
// If the default behavior is prevented, stop here!
if ( pblEvent.isDefaultPrevented() ) {
return deferred.promise();
}
if ( settings.showLoadMsg ) {
// This configurable timeout allows cached pages a brief delay to load without showing a message
var loadMsgDelay = setTimeout(function() {
$.mobile.showPageLoadingMsg();
}, settings.loadMsgDelay ),
// Shared logic for clearing timeout and removing message.
hideMsg = function() {
// Stop message show timer
clearTimeout( loadMsgDelay );
// Hide loading message
$.mobile.hidePageLoadingMsg();
};
}
// Reset base to the default document base.
if ( base ) {
base.reset();
}
if ( !( $.mobile.allowCrossDomainPages || path.isSameDomain( documentUrl, absUrl ) ) ) {
deferred.reject( absUrl, options );
} else {
// Load the new page.
$.ajax({
url: fileUrl,
type: settings.type,
data: settings.data,
dataType: "html",
success: function( html, textStatus, xhr ) {
//pre-parse html to check for a data-url,
//use it as the new fileUrl, base path, etc
var all = $( "<div></div>" ),
//page title regexp
newPageTitle = html.match( /<title[^>]*>([^<]*)/ ) && RegExp.$1,
// TODO handle dialogs again
pageElemRegex = new RegExp( "(<[^>]+\\bdata-" + $.mobile.ns + "role=[\"']?page[\"']?[^>]*>)" ),
dataUrlRegex = new RegExp( "\\bdata-" + $.mobile.ns + "url=[\"']?([^\"'>]*)[\"']?" );
// data-url must be provided for the base tag so resource requests can be directed to the
// correct url. loading into a temprorary element makes these requests immediately
if ( pageElemRegex.test( html ) &&
RegExp.$1 &&
dataUrlRegex.test( RegExp.$1 ) &&
RegExp.$1 ) {
url = fileUrl = path.getFilePath( $( "<div>" + RegExp.$1 + "</div>" ).text() );
}
if ( base ) {
base.set( fileUrl );
}
//workaround to allow scripts to execute when included in page divs
all.get( 0 ).innerHTML = html;
page = all.find( ":jqmData(role='page'), :jqmData(role='dialog')" ).first();
//if page elem couldn't be found, create one and insert the body element's contents
if ( !page.length ) {
page = $( "<div data-" + $.mobile.ns + "role='page'>" + html.split( /<\/?body[^>]*>/gmi )[1] + "</div>" );
}
if ( newPageTitle && !page.jqmData( "title" ) ) {
if ( ~newPageTitle.indexOf( "&" ) ) {
newPageTitle = $( "<div>" + newPageTitle + "</div>" ).text();
}
page.jqmData( "title", newPageTitle );
}
//rewrite src and href attrs to use a base url
if ( !$.support.dynamicBaseTag ) {
var newPath = path.get( fileUrl );
page.find( "[src], link[href], a[rel='external'], :jqmData(ajax='false'), a[target]" ).each(function() {
var thisAttr = $( this ).is( '[href]' ) ? 'href' :
$( this ).is( '[src]' ) ? 'src' : 'action',
thisUrl = $( this ).attr( thisAttr );
// XXX_jblas: We need to fix this so that it removes the document
// base URL, and then prepends with the new page URL.
//if full path exists and is same, chop it - helps IE out
thisUrl = thisUrl.replace( location.protocol + '//' + location.host + location.pathname, '' );
if ( !/^(\w+:|#|\/)/.test( thisUrl ) ) {
$( this ).attr( thisAttr, newPath + thisUrl );
}
});
}
//append to page and enhance
// TODO taging a page with external to make sure that embedded pages aren't removed
// by the various page handling code is bad. Having page handling code in many
// places is bad. Solutions post 1.0
page
.attr( "data-" + $.mobile.ns + "url", path.convertUrlToDataUrl( fileUrl ) )
.attr( "data-" + $.mobile.ns + "external-page", true )
.appendTo( settings.pageContainer );
// wait for page creation to leverage options defined on widget
page.one( 'pagecreate', $.mobile._bindPageRemove );
enhancePage( page, settings.role );
// Enhancing the page may result in new dialogs/sub pages being inserted
// into the DOM. If the original absUrl refers to a sub-page, that is the
// real page we are interested in.
if ( absUrl.indexOf( "&" + $.mobile.subPageUrlKey ) > -1 ) {
page = settings.pageContainer.children( "[data-" + $.mobile.ns +"url='" + dataUrl + "']" );
}
// Remove loading message.
if ( settings.showLoadMsg ) {
hideMsg();
}
// Add the page reference and xhr to our triggerData.
triggerData.xhr = xhr;
triggerData.textStatus = textStatus;
triggerData.page = page;
// Let listeners know the page loaded successfully.
settings.pageContainer.trigger( "pageload", triggerData );
deferred.resolve( absUrl, options, page, dupCachedPage );
},
error: function( xhr, textStatus, errorThrown ) {
//set base back to current path
if ( base ) {
base.set( path.get() );
}
// Add error info to our triggerData.
triggerData.xhr = xhr;
triggerData.textStatus = textStatus;
triggerData.errorThrown = errorThrown;
var plfEvent = new $.Event( "pageloadfailed" );
// Let listeners know the page load failed.
settings.pageContainer.trigger( plfEvent, triggerData );
// If the default behavior is prevented, stop here!
// Note that it is the responsibility of the listener/handler
// that called preventDefault(), to resolve/reject the
// deferred object within the triggerData.
if ( plfEvent.isDefaultPrevented() ) {
return;
}
// Remove loading message.
if ( settings.showLoadMsg ) {
// Remove loading message.
hideMsg();
// show error message
$.mobile.showPageLoadingMsg( $.mobile.pageLoadErrorMessageTheme, $.mobile.pageLoadErrorMessage, true );
// hide after delay
setTimeout( $.mobile.hidePageLoadingMsg, 1500 );
}
deferred.reject( absUrl, options );
}
});
}
return deferred.promise();
};
$.mobile.loadPage.defaults = {
type: "get",
data: undefined,
reloadPage: false,
role: undefined, // By default we rely on the role defined by the @data-role attribute.
showLoadMsg: false,
pageContainer: undefined,
loadMsgDelay: 50 // This delay allows loads that pull from browser cache to occur without showing the loading message.
};
// Show a specific page in the page container.
$.mobile.changePage = function( toPage, options ) {
// If we are in the midst of a transition, queue the current request.
// We'll call changePage() once we're done with the current transition to
// service the request.
if ( isPageTransitioning ) {
pageTransitionQueue.unshift( arguments );
return;
}
var settings = $.extend( {}, $.mobile.changePage.defaults, options ), isToPageString;
// Make sure we have a pageContainer to work with.
settings.pageContainer = settings.pageContainer || $.mobile.pageContainer;
// Make sure we have a fromPage.
settings.fromPage = settings.fromPage || $.mobile.activePage;
isToPageString = (typeof toPage === "string");
var mpc = settings.pageContainer,
pbcEvent = new $.Event( "pagebeforechange" ),
triggerData = { toPage: toPage, options: settings };
// NOTE: preserve the original target as the dataUrl value will be simplified
// eg, removing ui-state, and removing query params from the hash
// this is so that users who want to use query params have access to them
// in the event bindings for the page life cycle See issue #5085
if ( isToPageString ) {
// if the toPage is a string simply convert it
triggerData.absUrl = path.makeUrlAbsolute( toPage, findBaseWithDefault() );
} else {
// if the toPage is a jQuery object grab the absolute url stored
// in the loadPage callback where it exists
triggerData.absUrl = toPage.data( 'absUrl' );
}
// Let listeners know we're about to change the current page.
mpc.trigger( pbcEvent, triggerData );
// If the default behavior is prevented, stop here!
if ( pbcEvent.isDefaultPrevented() ) {
return;
}
// We allow "pagebeforechange" observers to modify the toPage in the trigger
// data to allow for redirects. Make sure our toPage is updated.
toPage = triggerData.toPage;
// Set the isPageTransitioning flag to prevent any requests from
// entering this method while we are in the midst of loading a page
// or transitioning.
isPageTransitioning = true;
// If the caller passed us a url, call loadPage()
// to make sure it is loaded into the DOM. We'll listen
// to the promise object it returns so we know when
// it is done loading or if an error ocurred.
if ( isToPageString ) {
// preserve the original target as the dataUrl value will be simplified
// eg, removing ui-state, and removing query params from the hash
// this is so that users who want to use query params have access to them
// in the event bindings for the page life cycle See issue #5085
settings.target = toPage;
$.mobile.loadPage( toPage, settings )
.done(function( url, options, newPage, dupCachedPage ) {
isPageTransitioning = false;
options.duplicateCachedPage = dupCachedPage;
// store the original absolute url so that it can be provided
// to events in the triggerData of the subsequent changePage call
newPage.data( 'absUrl', triggerData.absUrl );
$.mobile.changePage( newPage, options );
})
.fail(function( url, options ) {
isPageTransitioning = false;
//clear out the active button state
removeActiveLinkClass( true );
//release transition lock so navigation is free again
releasePageTransitionLock();
settings.pageContainer.trigger( "pagechangefailed", triggerData );
});
return;
}
// If we are going to the first-page of the application, we need to make
// sure settings.dataUrl is set to the application document url. This allows
// us to avoid generating a document url with an id hash in the case where the
// first-page of the document has an id attribute specified.
if ( toPage[ 0 ] === $.mobile.firstPage[ 0 ] && !settings.dataUrl ) {
settings.dataUrl = documentUrl.hrefNoHash;
}
// The caller passed us a real page DOM element. Update our
// internal state and then trigger a transition to the page.
var fromPage = settings.fromPage,
url = ( settings.dataUrl && path.convertUrlToDataUrl( settings.dataUrl ) ) || toPage.jqmData( "url" ),
// The pageUrl var is usually the same as url, except when url is obscured as a dialog url. pageUrl always contains the file path
pageUrl = url,
fileUrl = path.getFilePath( url ),
active = urlHistory.getActive(),
activeIsInitialPage = urlHistory.activeIndex === 0,
historyDir = 0,
pageTitle = document.title,
isDialog = settings.role === "dialog" || toPage.jqmData( "role" ) === "dialog";
// By default, we prevent changePage requests when the fromPage and toPage
// are the same element, but folks that generate content manually/dynamically
// and reuse pages want to be able to transition to the same page. To allow
// this, they will need to change the default value of allowSamePageTransition
// to true, *OR*, pass it in as an option when they manually call changePage().
// It should be noted that our default transition animations assume that the
// formPage and toPage are different elements, so they may behave unexpectedly.
// It is up to the developer that turns on the allowSamePageTransitiona option
// to either turn off transition animations, or make sure that an appropriate
// animation transition is used.
if ( fromPage && fromPage[0] === toPage[0] && !settings.allowSamePageTransition ) {
isPageTransitioning = false;
mpc.trigger( "pagechange", triggerData );
// Even if there is no page change to be done, we should keep the urlHistory in sync with the hash changes
if ( settings.fromHashChange ) {
urlHistory.direct({ url: url });
}
return;
}
// We need to make sure the page we are given has already been enhanced.
enhancePage( toPage, settings.role );
// If the changePage request was sent from a hashChange event, check to see if the
// page is already within the urlHistory stack. If so, we'll assume the user hit
// the forward/back button and will try to match the transition accordingly.
if ( settings.fromHashChange ) {
historyDir = options.direction === "back" ? -1 : 1;
}
// Kill the keyboard.
// XXX_jblas: We need to stop crawling the entire document to kill focus. Instead,
// we should be tracking focus with a delegate() handler so we already have
// the element in hand at this point.
// Wrap this in a try/catch block since IE9 throw "Unspecified error" if document.activeElement
// is undefined when we are in an IFrame.
try {
if ( document.activeElement && document.activeElement.nodeName.toLowerCase() !== 'body' ) {
$( document.activeElement ).blur();
} else {
$( "input:focus, textarea:focus, select:focus" ).blur();
}
} catch( e ) {}
// Record whether we are at a place in history where a dialog used to be - if so, do not add a new history entry and do not change the hash either
var alreadyThere = false;
// If we're displaying the page as a dialog, we don't want the url
// for the dialog content to be used in the hash. Instead, we want
// to append the dialogHashKey to the url of the current page.
if ( isDialog && active ) {
// on the initial page load active.url is undefined and in that case should
// be an empty string. Moving the undefined -> empty string back into
// urlHistory.addNew seemed imprudent given undefined better represents
// the url state
// If we are at a place in history that once belonged to a dialog, reuse
// this state without adding to urlHistory and without modifying the hash.
// However, if a dialog is already displayed at this point, and we're
// about to display another dialog, then we must add another hash and
// history entry on top so that one may navigate back to the original dialog
if ( active.url && active.url.indexOf( dialogHashKey ) > -1 && !$.mobile.activePage.is( ".ui-dialog" ) ) {
settings.changeHash = false;
alreadyThere = true;
}
// Normally, we tack on a dialog hash key, but if this is the location of a stale dialog,
// we reuse the URL from the entry
url = ( active.url || "" );
// account for absolute urls instead of just relative urls use as hashes
if( !alreadyThere && url.indexOf("#") > -1 ) {
url += dialogHashKey;
} else {
url += "#" + dialogHashKey;
}
// tack on another dialogHashKey if this is the same as the initial hash
// this makes sure that a history entry is created for this dialog
if ( urlHistory.activeIndex === 0 && url === urlHistory.initialDst ) {
url += dialogHashKey;
}
}
// if title element wasn't found, try the page div data attr too
// If this is a deep-link or a reload ( active === undefined ) then just use pageTitle
var newPageTitle = ( !active )? pageTitle : toPage.jqmData( "title" ) || toPage.children( ":jqmData(role='header')" ).find( ".ui-title" ).getEncodedText();
if ( !!newPageTitle && pageTitle === document.title ) {
pageTitle = newPageTitle;
}
if ( !toPage.jqmData( "title" ) ) {
toPage.jqmData( "title", pageTitle );
}
// Make sure we have a transition defined.
settings.transition = settings.transition ||
( ( historyDir && !activeIsInitialPage ) ? active.transition : undefined ) ||
( isDialog ? $.mobile.defaultDialogTransition : $.mobile.defaultPageTransition );
//add page to history stack if it's not back or forward
if ( !historyDir && alreadyThere ) {
urlHistory.getActive().pageUrl = pageUrl;
}
// Set the location hash.
if ( settings.changeHash !== false && url ) {
//disable hash listening temporarily
urlHistory.ignoreNextHashChange = true;
// rebuilding the hash here since we loose it earlier on
// TODO preserve the originally passed in path
if( !path.isPath( url ) && url.indexOf( "#" ) < 0 ) {
url = "#" + url;
}
// TODO the property names here are just silly
$.navigate( url, {
transition: settings.transition,
title: pageTitle,
pageUrl: pageUrl,
role: settings.role
}, true);
}
//set page title
document.title = pageTitle;
//set "toPage" as activePage
$.mobile.activePage = toPage;
// If we're navigating back in the URL history, set reverse accordingly.
settings.reverse = settings.reverse || historyDir < 0;
transitionPages( toPage, fromPage, settings.transition, settings.reverse )
.done(function( name, reverse, $to, $from, alreadyFocused ) {
removeActiveLinkClass();
//if there's a duplicateCachedPage, remove it from the DOM now that it's hidden
if ( settings.duplicateCachedPage ) {
settings.duplicateCachedPage.remove();
}
// Send focus to the newly shown page. Moved from promise .done binding in transitionPages
// itself to avoid ie bug that reports offsetWidth as > 0 (core check for visibility)
// despite visibility: hidden addresses issue #2965
// https://github.com/jquery/jquery-mobile/issues/2965
if ( !alreadyFocused ) {
$.mobile.focusPage( toPage );
}
releasePageTransitionLock();
mpc.trigger( "pagechange", triggerData );
});
};
$.mobile.changePage.defaults = {
transition: undefined,
reverse: false,
changeHash: true,
fromHashChange: false,
role: undefined, // By default we rely on the role defined by the @data-role attribute.
duplicateCachedPage: undefined,
pageContainer: undefined,
showLoadMsg: true, //loading message shows by default when pages are being fetched during changePage
dataUrl: undefined,
fromPage: undefined,
allowSamePageTransition: false
};
/* Event Bindings - hashchange, submit, and click */
function findClosestLink( ele )
{
while ( ele ) {
// Look for the closest element with a nodeName of "a".
// Note that we are checking if we have a valid nodeName
// before attempting to access it. This is because the
// node we get called with could have originated from within
// an embedded SVG document where some symbol instance elements
// don't have nodeName defined on them, or strings are of type
// SVGAnimatedString.
if ( ( typeof ele.nodeName === "string" ) && ele.nodeName.toLowerCase() === "a" ) {
break;
}
ele = ele.parentNode;
}
return ele;
}
// The base URL for any given element depends on the page it resides in.
function getClosestBaseUrl( ele )
{
// Find the closest page and extract out its url.
var url = $( ele ).closest( ".ui-page" ).jqmData( "url" ),
base = documentBase.hrefNoHash;
if ( !url || !path.isPath( url ) ) {
url = base;
}
return path.makeUrlAbsolute( url, base);
}
//The following event bindings should be bound after mobileinit has been triggered
//the following deferred is resolved in the init file
$.mobile.navreadyDeferred = $.Deferred();
$.mobile._registerInternalEvents = function() {
var getAjaxFormData = function( $form, calculateOnly ) {
var type, target, url, ret = true;
if ( !$.mobile.ajaxEnabled ||
// test that the form is, itself, ajax false
$form.is( ":jqmData(ajax='false')" ) ||
// test that $.mobile.ignoreContentEnabled is set and
// the form or one of it's parents is ajax=false
!$form.jqmHijackable().length ) {
return false;
}
target = $form.attr( "target" );
url = $form.attr( "action" );
// If no action is specified, browsers default to using the
// URL of the document containing the form. Since we dynamically
// pull in pages from external documents, the form should submit
// to the URL for the source document of the page containing
// the form.
if ( !url ) {
// Get the @data-url for the page containing the form.
url = getClosestBaseUrl( $form );
if ( url === documentBase.hrefNoHash ) {
// The url we got back matches the document base,
// which means the page must be an internal/embedded page,
// so default to using the actual document url as a browser
// would.
url = documentUrl.hrefNoSearch;
}
}
url = path.makeUrlAbsolute( url, getClosestBaseUrl( $form ) );
if ( ( path.isExternal( url ) && !path.isPermittedCrossDomainRequest( documentUrl, url ) ) || target ) {
return false;
}
if ( !calculateOnly ) {
type = $form.attr( "method" );
ret = {
url: url,
options: {
type: type && type.length && type.toLowerCase() || "get",
data: $form.serialize(),
transition: $form.jqmData( "transition" ),
reverse: $form.jqmData( "direction" ) === "reverse",
reloadPage: true
}
};
}
return ret;
};
//bind to form submit events, handle with Ajax
$( document ).delegate( "form", "submit", function( event ) {
var formData = getAjaxFormData( $( this ) );
if ( formData ) {
$.mobile.changePage( formData.url, formData.options );
event.preventDefault();
}