mirror of
https://github.com/Hopiu/jquery-mobile.git
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379 lines
10 KiB
JavaScript
379 lines
10 KiB
JavaScript
/*
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* "fixHeaderFooter" plugin - on-demand positioning for headers,footers
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*/
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(function( $, undefined ) {
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var slideDownClass = "ui-header-fixed ui-fixed-inline fade",
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slideUpClass = "ui-footer-fixed ui-fixed-inline fade",
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slideDownSelector = ".ui-header:jqmData(position='fixed')",
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slideUpSelector = ".ui-footer:jqmData(position='fixed')";
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$.fn.fixHeaderFooter = function( options ) {
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if ( !$.support.scrollTop || ( $.support.touchOverflow && $.mobile.touchOverflowEnabled ) ) {
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return this;
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}
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return this.each(function() {
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var $this = $( this );
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if ( $this.jqmData( "fullscreen" ) ) {
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$this.addClass( "ui-page-fullscreen" );
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}
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// Should be slidedown
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$this.find( slideDownSelector ).addClass( slideDownClass );
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// Should be slideup
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$this.find( slideUpSelector ).addClass( slideUpClass );
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});
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};
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// single controller for all showing,hiding,toggling
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$.mobile.fixedToolbars = (function() {
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if ( !$.support.scrollTop || ( $.support.touchOverflow && $.mobile.touchOverflowEnabled ) ) {
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return;
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}
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var stickyFooter, delayTimer,
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currentstate = "inline",
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autoHideMode = false,
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showDelay = 100,
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ignoreTargets = "a,input,textarea,select,button,label,.ui-header-fixed,.ui-footer-fixed",
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toolbarSelector = ".ui-header-fixed:first, .ui-footer-fixed:not(.ui-footer-duplicate):last",
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// for storing quick references to duplicate footers
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supportTouch = $.support.touch,
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touchStartEvent = supportTouch ? "touchstart" : "mousedown",
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touchStopEvent = supportTouch ? "touchend" : "mouseup",
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stateBefore = null,
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scrollTriggered = false,
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touchToggleEnabled = true;
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function showEventCallback( event ) {
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// An event that affects the dimensions of the visual viewport has
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// been triggered. If the header and/or footer for the current page are in overlay
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// mode, we want to hide them, and then fire off a timer to show them at a later
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// point. Events like a resize can be triggered continuously during a scroll, on
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// some platforms, so the timer is used to delay the actual positioning until the
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// flood of events have subsided.
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//
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// If we are in autoHideMode, we don't do anything because we know the scroll
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// callbacks for the plugin will fire off a show when the scrolling has stopped.
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if ( !autoHideMode && currentstate === "overlay" ) {
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if ( !delayTimer ) {
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$.mobile.fixedToolbars.hide( true );
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}
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$.mobile.fixedToolbars.startShowTimer();
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}
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}
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$(function() {
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var $document = $( document ),
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$window = $( window );
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$document
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.bind( "vmousedown", function( event ) {
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if ( touchToggleEnabled ) {
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stateBefore = currentstate;
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}
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})
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.bind( "vclick", function( event ) {
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if ( touchToggleEnabled ) {
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if ( $(event.target).closest( ignoreTargets ).length ) {
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return;
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}
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if ( !scrollTriggered ) {
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$.mobile.fixedToolbars.toggle( stateBefore );
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stateBefore = null;
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}
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}
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})
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.bind( "silentscroll", showEventCallback );
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// The below checks first for a $(document).scrollTop() value, and if zero, binds scroll events to $(window) instead.
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// If the scrollTop value is actually zero, both will return zero anyway.
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//
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// Works with $(document), not $(window) : Opera Mobile (WinMO phone; kinda broken anyway)
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// Works with $(window), not $(document) : IE 7/8
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// Works with either $(window) or $(document) : Chrome, FF 3.6/4, Android 1.6/2.1, iOS
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// Needs work either way : BB5, Opera Mobile (iOS)
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( ( $document.scrollTop() === 0 ) ? $window : $document )
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.bind( "scrollstart", function( event ) {
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scrollTriggered = true;
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if ( stateBefore === null ) {
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stateBefore = currentstate;
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}
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// We only enter autoHideMode if the headers/footers are in
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// an overlay state or the show timer was started. If the
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// show timer is set, clear it so the headers/footers don't
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// show up until after we're done scrolling.
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var isOverlayState = stateBefore == "overlay";
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autoHideMode = isOverlayState || !!delayTimer;
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if ( autoHideMode ) {
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$.mobile.fixedToolbars.clearShowTimer();
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if ( isOverlayState ) {
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$.mobile.fixedToolbars.hide( true );
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}
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}
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})
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.bind( "scrollstop", function( event ) {
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if ( $( event.target ).closest( ignoreTargets ).length ) {
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return;
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}
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scrollTriggered = false;
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if ( autoHideMode ) {
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$.mobile.fixedToolbars.startShowTimer();
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autoHideMode = false;
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}
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stateBefore = null;
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});
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$window.bind( "resize updatelayout", showEventCallback );
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});
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// 1. Before page is shown, check for duplicate footer
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// 2. After page is shown, append footer to new page
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$( ".ui-page" )
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.live( "pagebeforeshow", function( event, ui ) {
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var page = $( event.target ),
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footer = page.find( ":jqmData(role='footer')" ),
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id = footer.data( "id" ),
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prevPage = ui.prevPage,
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prevFooter = prevPage && prevPage.find( ":jqmData(role='footer')" ),
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prevFooterMatches = prevFooter.length && prevFooter.jqmData( "id" ) === id;
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if ( id && prevFooterMatches ) {
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stickyFooter = footer;
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setTop( stickyFooter.removeClass( "fade in out" ).appendTo( $.mobile.pageContainer ) );
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}
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})
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.live( "pageshow", function( event, ui ) {
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var $this = $( this );
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if ( stickyFooter && stickyFooter.length ) {
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setTimeout(function() {
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setTop( stickyFooter.appendTo( $this ).addClass( "fade" ) );
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stickyFooter = null;
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}, 500);
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}
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$.mobile.fixedToolbars.show( true, this );
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});
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// When a collapsiable is hidden or shown we need to trigger the fixed toolbar to reposition itself (#1635)
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$( ".ui-collapsible-contain" ).live( "collapse expand", showEventCallback );
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// element.getBoundingClientRect() is broken in iOS 3.2.1 on the iPad. The
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// coordinates inside of the rect it returns don't have the page scroll position
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// factored out of it like the other platforms do. To get around this,
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// we'll just calculate the top offset the old fashioned way until core has
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// a chance to figure out how to handle this situation.
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//
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// TODO: We'll need to get rid of getOffsetTop() once a fix gets folded into core.
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function getOffsetTop( ele ) {
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var top = 0,
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op, body;
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if ( ele ) {
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body = document.body;
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op = ele.offsetParent;
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top = ele.offsetTop;
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while ( ele && ele != body ) {
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top += ele.scrollTop || 0;
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if ( ele == op ) {
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top += op.offsetTop;
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op = ele.offsetParent;
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}
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ele = ele.parentNode;
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}
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}
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return top;
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}
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function setTop( el ) {
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var fromTop = $(window).scrollTop(),
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thisTop = getOffsetTop( el[ 0 ] ), // el.offset().top returns the wrong value on iPad iOS 3.2.1, call our workaround instead.
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thisCSStop = el.css( "top" ) == "auto" ? 0 : parseFloat(el.css( "top" )),
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screenHeight = window.innerHeight,
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thisHeight = el.outerHeight(),
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useRelative = el.parents( ".ui-page:not(.ui-page-fullscreen)" ).length,
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relval;
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if ( el.is( ".ui-header-fixed" ) ) {
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relval = fromTop - thisTop + thisCSStop;
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if ( relval < thisTop ) {
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relval = 0;
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}
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return el.css( "top", useRelative ? relval : fromTop );
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} else {
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// relval = -1 * (thisTop - (fromTop + screenHeight) + thisCSStop + thisHeight);
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// if ( relval > thisTop ) { relval = 0; }
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relval = fromTop + screenHeight - thisHeight - (thisTop - thisCSStop );
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return el.css( "top", useRelative ? relval : fromTop + screenHeight - thisHeight );
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}
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}
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// Exposed methods
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return {
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show: function( immediately, page ) {
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$.mobile.fixedToolbars.clearShowTimer();
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currentstate = "overlay";
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var $ap = page ? $( page ) :
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( $.mobile.activePage ? $.mobile.activePage :
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$( ".ui-page-active" ) );
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return $ap.children( toolbarSelector ).each(function() {
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var el = $( this ),
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fromTop = $( window ).scrollTop(),
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// el.offset().top returns the wrong value on iPad iOS 3.2.1, call our workaround instead.
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thisTop = getOffsetTop( el[ 0 ] ),
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screenHeight = window.innerHeight,
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thisHeight = el.outerHeight(),
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alreadyVisible = ( el.is( ".ui-header-fixed" ) && fromTop <= thisTop + thisHeight ) ||
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( el.is( ".ui-footer-fixed" ) && thisTop <= fromTop + screenHeight );
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// Add state class
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el.addClass( "ui-fixed-overlay" ).removeClass( "ui-fixed-inline" );
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if ( !alreadyVisible && !immediately ) {
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el.animationComplete(function() {
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el.removeClass( "in" );
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}).addClass( "in" );
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}
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setTop(el);
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});
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},
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hide: function( immediately ) {
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currentstate = "inline";
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var $ap = $.mobile.activePage ? $.mobile.activePage :
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$( ".ui-page-active" );
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return $ap.children( toolbarSelector ).each(function() {
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var el = $(this),
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thisCSStop = el.css( "top" ),
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classes;
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thisCSStop = thisCSStop == "auto" ? 0 :
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parseFloat(thisCSStop);
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// Add state class
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el.addClass( "ui-fixed-inline" ).removeClass( "ui-fixed-overlay" );
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if ( thisCSStop < 0 || ( el.is( ".ui-header-fixed" ) && thisCSStop !== 0 ) ) {
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if ( immediately ) {
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el.css( "top", 0);
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} else {
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if ( el.css( "top" ) !== "auto" && parseFloat( el.css( "top" ) ) !== 0 ) {
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classes = "out reverse";
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el.animationComplete(function() {
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el.removeClass( classes ).css( "top", 0 );
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}).addClass( classes );
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}
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}
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}
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});
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},
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startShowTimer: function() {
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$.mobile.fixedToolbars.clearShowTimer();
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var args = [].slice.call( arguments );
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delayTimer = setTimeout(function() {
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delayTimer = undefined;
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$.mobile.fixedToolbars.show.apply( null, args );
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}, showDelay);
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},
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clearShowTimer: function() {
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if ( delayTimer ) {
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clearTimeout( delayTimer );
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}
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delayTimer = undefined;
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},
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toggle: function( from ) {
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if ( from ) {
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currentstate = from;
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}
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return ( currentstate === "overlay" ) ? $.mobile.fixedToolbars.hide() :
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$.mobile.fixedToolbars.show();
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},
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setTouchToggleEnabled: function( enabled ) {
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touchToggleEnabled = enabled;
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}
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};
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})();
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//auto self-init widgets
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$( document ).bind( "pagecreate create", function( event ) {
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if ( $( ":jqmData(position='fixed')", event.target ).length ) {
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$( event.target ).each(function() {
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if ( !$.support.scrollTop || ( $.support.touchOverflow && $.mobile.touchOverflowEnabled ) ) {
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return this;
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}
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var $this = $( this );
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if ( $this.jqmData( "fullscreen" ) ) {
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$this.addClass( "ui-page-fullscreen" );
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}
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// Should be slidedown
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$this.find( slideDownSelector ).addClass( slideDownClass );
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// Should be slideup
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$this.find( slideUpSelector ).addClass( slideUpClass );
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})
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}
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});
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})( jQuery );
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