/
photoswipe.class.js
1302 lines (916 loc) · 29.4 KB
/
photoswipe.class.js
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// Copyright (c) %%year%% by Code Computerlove (http://www.codecomputerlove.com)
// Licensed under the MIT license
// version: %%version%%
(function(window, klass, Util, Cache, DocumentOverlay, Carousel, Toolbar, UILayer, ZoomPanRotate){
Util.registerNamespace('Code.PhotoSwipe');
var PhotoSwipe = window.Code.PhotoSwipe;
PhotoSwipe.PhotoSwipeClass = klass({
id: null,
settings: null,
isBackEventSupported: null,
backButtonClicked: null,
currentIndex: null,
originalImages: null,
mouseWheelStartTime: null,
windowDimensions: null,
// Components
cache: null,
documentOverlay: null,
carousel: null,
uiLayer: null,
toolbar: null,
zoomPanRotate: null,
// Handlers
windowOrientationChangeHandler: null,
windowScrollHandler: null,
windowHashChangeHandler: null,
keyDownHandler: null,
windowOrientationEventName: null,
uiLayerTouchHandler: null,
carouselSlideByEndHandler: null,
carouselSlideshowStartHandler: null,
carouselSlideshowStopHandler: null,
toolbarTapHandler: null,
toolbarBeforeShowHandler: null,
toolbarShowHandler: null,
toolbarBeforeHideHandler: null,
toolbarHideHandler: null,
mouseWheelHandler: null,
zoomPanRotateTransformHandler: null,
_isResettingPosition: null,
_uiWebViewResetPositionTimeout: null,
/*
* Function: dispose
*/
dispose: function(){
var prop;
Util.Events.remove(this, PhotoSwipe.EventTypes.onBeforeShow);
Util.Events.remove(this, PhotoSwipe.EventTypes.onShow);
Util.Events.remove(this, PhotoSwipe.EventTypes.onBeforeHide);
Util.Events.remove(this, PhotoSwipe.EventTypes.onHide);
Util.Events.remove(this, PhotoSwipe.EventTypes.onDisplayImage);
Util.Events.remove(this, PhotoSwipe.EventTypes.onResetPosition);
Util.Events.remove(this, PhotoSwipe.EventTypes.onSlideshowStart);
Util.Events.remove(this, PhotoSwipe.EventTypes.onSlideshowStop);
Util.Events.remove(this, PhotoSwipe.EventTypes.onTouch);
Util.Events.remove(this, PhotoSwipe.EventTypes.onBeforeCaptionAndToolbarShow);
Util.Events.remove(this, PhotoSwipe.EventTypes.onCaptionAndToolbarShow);
Util.Events.remove(this, PhotoSwipe.EventTypes.onBeforeCaptionAndToolbarHide);
Util.Events.remove(this, PhotoSwipe.EventTypes.onCaptionAndToolbarHide);
Util.Events.remove(this, PhotoSwipe.EventTypes.onZoomPanRotateTransform);
this.removeEventHandlers();
if (!Util.isNothing(this.documentOverlay)){
this.documentOverlay.dispose();
}
if (!Util.isNothing(this.carousel)){
this.carousel.dispose();
}
this.destroyZoomPanRotate();
if (!Util.isNothing(this.uiLayer)){
this.uiLayer.dispose();
}
if (!Util.isNothing(this.toolbar)){
this.toolbar.dispose();
}
if (!Util.isNothing(this.cache)){
this.cache.dispose();
}
for (prop in this) {
if (Util.objectHasProperty(this, prop)) {
this[prop] = null;
}
}
},
/*
* Function: initialize
*/
initialize: function(images, options, id){
var targetPosition;
if (Util.isNothing(id)){
this.id = 'PhotoSwipe' + new Date().getTime().toString();
}
else{
this.id = id;
}
this.originalImages = images;
if (Util.Browser.android && !Util.Browser.firefox){
if (window.navigator.userAgent.match(/Android (\d+.\d+)/).toString().replace(/^.*\,/, '') >= 2.1){
this.isBackEventSupported = true;
}
}
if (!this.isBackEventSupported){
this.isBackEventSupported = Util.objectHasProperty(window, 'onhashchange');
}
this.settings = {
// General
fadeInSpeed: 250,
fadeOutSpeed: 250,
preventHide: false,
preventSlideshow: false,
zIndex: 1000,
backButtonHideEnabled: true,
enableKeyboard: true,
enableMouseWheel: true,
mouseWheelSpeed: 350,
autoStartSlideshow: false,
jQueryMobile: ( !Util.isNothing(window.jQuery) && !Util.isNothing(window.jQuery.mobile) ),
jQueryMobileDialogHash: '&ui-state=dialog',
enableUIWebViewRepositionTimeout: false,
uiWebViewResetPositionDelay: 500,
target: window,
preventDefaultTouchEvents: true,
allowVerticalScroll:false,
// Carousel
loop: true,
slideSpeed: 250,
nextPreviousSlideSpeed: 0,
enableDrag: true,
swipeThreshold: 50,
swipeTimeThreshold: 250,
slideTimingFunction: 'ease-out',
slideshowDelay: 3000,
doubleTapSpeed: 250,
margin: 20,
imageScaleMethod: 'fit', // Either "fit", "fitNoUpscale" or "zoom",
// Toolbar
captionAndToolbarHide: false,
captionAndToolbarFlipPosition: false,
captionAndToolbarAutoHideDelay: 5000,
captionAndToolbarOpacity: 0.8,
captionAndToolbarShowEmptyCaptions: true,
getToolbar: PhotoSwipe.Toolbar.getToolbar,
// ZoomPanRotate
allowUserZoom: true,
allowRotationOnUserZoom: false,
maxUserZoom: 5.0,
minUserZoom: 0.5,
doubleTapZoomLevel: 2.5,
// Cache
getImageSource: PhotoSwipe.Cache.Functions.getImageSource,
getImageCaption: PhotoSwipe.Cache.Functions.getImageCaption,
getImageMetaData: PhotoSwipe.Cache.Functions.getImageMetaData,
cacheMode: PhotoSwipe.Cache.Mode.normal
};
Util.extend(this.settings, options);
if (this.settings.target !== window){
targetPosition = Util.DOM.getStyle(this.settings.target, 'position');
if (targetPosition !== 'relative' || targetPosition !== 'absolute'){
Util.DOM.setStyle(this.settings.target, 'position', 'relative');
}
}
if (this.settings.target !== window){
this.isBackEventSupported = false;
this.settings.backButtonHideEnabled = false;
}
else{
if (this.settings.preventHide){
this.settings.backButtonHideEnabled = false;
}
}
this.cache = new Cache.CacheClass(images, this.settings);
},
/*
* Function: show
*/
show: function(obj){
var i, j;
this._isResettingPosition = false;
this.backButtonClicked = false;
// Work out what the starting index is
if (Util.isNumber(obj)){
this.currentIndex = obj;
}
else{
this.currentIndex = -1;
for (i=0, j=this.originalImages.length; i<j; i++){
if (this.originalImages[i] === obj){
this.currentIndex = i;
break;
}
}
}
if (this.currentIndex < 0 || this.currentIndex > this.originalImages.length-1){
throw "Code.PhotoSwipe.PhotoSwipeClass.show: Starting index out of range";
}
// Store a reference to the current window dimensions
// Use this later to double check that a window has actually
// been resized.
this.isAlreadyGettingPage = this.getWindowDimensions();
// Set this instance to be the active instance
PhotoSwipe.setActivateInstance(this);
this.windowDimensions = this.getWindowDimensions();
// Create components
if (this.settings.target === window){
Util.DOM.addClass(window.document.body, PhotoSwipe.CssClasses.buildingBody);
}
else{
Util.DOM.addClass(this.settings.target, PhotoSwipe.CssClasses.buildingBody);
}
this.createComponents();
Util.Events.fire(this, {
type: PhotoSwipe.EventTypes.onBeforeShow,
target: this
});
// Fade in the document overlay
this.documentOverlay.fadeIn(this.settings.fadeInSpeed, this.onDocumentOverlayFadeIn.bind(this));
},
/*
* Function: getWindowDimensions
*/
getWindowDimensions: function(){
return {
width: Util.DOM.windowWidth(),
height: Util.DOM.windowHeight()
};
},
/*
* Function: createComponents
*/
createComponents: function(){
this.documentOverlay = new DocumentOverlay.DocumentOverlayClass(this.settings);
this.carousel = new Carousel.CarouselClass(this.cache, this.settings);
this.uiLayer = new UILayer.UILayerClass(this.settings);
if (!this.settings.captionAndToolbarHide){
this.toolbar = new Toolbar.ToolbarClass(this.cache, this.settings);
}
},
/*
* Function: resetPosition
*/
resetPosition: function(){
if (this._isResettingPosition){
return;
}
var newWindowDimensions = this.getWindowDimensions();
if (!Util.isNothing(this.windowDimensions)){
if (newWindowDimensions.width === this.windowDimensions.width && newWindowDimensions.height === this.windowDimensions.height){
// This was added as a fudge for iOS
return;
}
}
this._isResettingPosition = true;
this.windowDimensions = newWindowDimensions;
this.destroyZoomPanRotate();
this.documentOverlay.resetPosition();
this.carousel.resetPosition();
if (!Util.isNothing(this.toolbar)){
this.toolbar.resetPosition();
}
this.uiLayer.resetPosition();
this._isResettingPosition = false;
Util.Events.fire(this, {
type: PhotoSwipe.EventTypes.onResetPosition,
target: this
});
},
/*
* Function: addEventHandler
*/
addEventHandler: function(type, handler){
Util.Events.add(this, type, handler);
},
/*
* Function: addEventHandlers
*/
addEventHandlers: function(){
if (Util.isNothing(this.windowOrientationChangeHandler)){
this.windowOrientationChangeHandler = this.onWindowOrientationChange.bind(this);
this.windowScrollHandler = this.onWindowScroll.bind(this);
this.keyDownHandler = this.onKeyDown.bind(this);
this.windowHashChangeHandler = this.onWindowHashChange.bind(this);
this.uiLayerTouchHandler = this.onUILayerTouch.bind(this);
this.carouselSlideByEndHandler = this.onCarouselSlideByEnd.bind(this);
this.carouselSlideshowStartHandler = this.onCarouselSlideshowStart.bind(this);
this.carouselSlideshowStopHandler = this.onCarouselSlideshowStop.bind(this);
this.toolbarTapHandler = this.onToolbarTap.bind(this);
this.toolbarBeforeShowHandler = this.onToolbarBeforeShow.bind(this);
this.toolbarShowHandler = this.onToolbarShow.bind(this);
this.toolbarBeforeHideHandler = this.onToolbarBeforeHide.bind(this);
this.toolbarHideHandler = this.onToolbarHide.bind(this);
this.mouseWheelHandler = this.onMouseWheel.bind(this);
this.zoomPanRotateTransformHandler = this.onZoomPanRotateTransform.bind(this);
}
// Set window handlers
if (Util.Browser.android){
// For some reason, resize was more stable than orientationchange in Android
this.orientationEventName = 'resize';
}
else if (Util.Browser.iOS && (!Util.Browser.safari)){
Util.Events.add(window.document.body, 'orientationchange', this.windowOrientationChangeHandler);
}
else{
var supportsOrientationChange = !Util.isNothing(window.onorientationchange);
this.orientationEventName = supportsOrientationChange ? 'orientationchange' : 'resize';
}
if (!Util.isNothing(this.orientationEventName)){
Util.Events.add(window, this.orientationEventName, this.windowOrientationChangeHandler);
}
if (this.settings.target === window){
Util.Events.add(window, 'scroll', this.windowScrollHandler);
}
if (this.settings.enableKeyboard){
Util.Events.add(window.document, 'keydown', this.keyDownHandler);
}
if (this.isBackEventSupported && this.settings.backButtonHideEnabled){
this.windowHashChangeHandler = this.onWindowHashChange.bind(this);
if (this.settings.jQueryMobile){
window.location.hash = this.settings.jQueryMobileDialogHash;
}
else{
this.currentHistoryHashValue = 'PhotoSwipe' + new Date().getTime().toString();
window.location.hash = this.currentHistoryHashValue;
}
Util.Events.add(window, 'hashchange', this.windowHashChangeHandler);
}
if (this.settings.enableMouseWheel){
Util.Events.add(window, 'mousewheel', this.mouseWheelHandler);
}
Util.Events.add(this.uiLayer, Util.TouchElement.EventTypes.onTouch, this.uiLayerTouchHandler);
Util.Events.add(this.carousel, Carousel.EventTypes.onSlideByEnd, this.carouselSlideByEndHandler);
Util.Events.add(this.carousel, Carousel.EventTypes.onSlideshowStart, this.carouselSlideshowStartHandler);
Util.Events.add(this.carousel, Carousel.EventTypes.onSlideshowStop, this.carouselSlideshowStopHandler);
if (!Util.isNothing(this.toolbar)){
Util.Events.add(this.toolbar, Toolbar.EventTypes.onTap, this.toolbarTapHandler);
Util.Events.add(this.toolbar, Toolbar.EventTypes.onBeforeShow, this.toolbarBeforeShowHandler);
Util.Events.add(this.toolbar, Toolbar.EventTypes.onShow, this.toolbarShowHandler);
Util.Events.add(this.toolbar, Toolbar.EventTypes.onBeforeHide, this.toolbarBeforeHideHandler);
Util.Events.add(this.toolbar, Toolbar.EventTypes.onHide, this.toolbarHideHandler);
}
},
/*
* Function: removeEventHandlers
*/
removeEventHandlers: function(){
if (Util.Browser.iOS && (!Util.Browser.safari)){
Util.Events.remove(window.document.body, 'orientationchange', this.windowOrientationChangeHandler);
}
if (!Util.isNothing(this.orientationEventName)){
Util.Events.remove(window, this.orientationEventName, this.windowOrientationChangeHandler);
}
Util.Events.remove(window, 'scroll', this.windowScrollHandler);
if (this.settings.enableKeyboard){
Util.Events.remove(window.document, 'keydown', this.keyDownHandler);
}
if (this.isBackEventSupported && this.settings.backButtonHideEnabled){
Util.Events.remove(window, 'hashchange', this.windowHashChangeHandler);
}
if (this.settings.enableMouseWheel){
Util.Events.remove(window, 'mousewheel', this.mouseWheelHandler);
}
if (!Util.isNothing(this.uiLayer)){
Util.Events.remove(this.uiLayer, Util.TouchElement.EventTypes.onTouch, this.uiLayerTouchHandler);
}
if (!Util.isNothing(this.toolbar)){
Util.Events.remove(this.carousel, Carousel.EventTypes.onSlideByEnd, this.carouselSlideByEndHandler);
Util.Events.remove(this.carousel, Carousel.EventTypes.onSlideshowStart, this.carouselSlideshowStartHandler);
Util.Events.remove(this.carousel, Carousel.EventTypes.onSlideshowStop, this.carouselSlideshowStopHandler);
}
if (!Util.isNothing(this.toolbar)){
Util.Events.remove(this.toolbar, Toolbar.EventTypes.onTap, this.toolbarTapHandler);
Util.Events.remove(this.toolbar, Toolbar.EventTypes.onBeforeShow, this.toolbarBeforeShowHandler);
Util.Events.remove(this.toolbar, Toolbar.EventTypes.onShow, this.toolbarShowHandler);
Util.Events.remove(this.toolbar, Toolbar.EventTypes.onBeforeHide, this.toolbarBeforeHideHandler);
Util.Events.remove(this.toolbar, Toolbar.EventTypes.onHide, this.toolbarHideHandler);
}
},
/*
* Function: hide
*/
hide: function(){
if (this.settings.preventHide){
return;
}
if (Util.isNothing(this.documentOverlay)){
throw "Code.PhotoSwipe.PhotoSwipeClass.hide: PhotoSwipe instance is already hidden";
}
if (!Util.isNothing(this.hiding)){
return;
}
this.clearUIWebViewResetPositionTimeout();
this.destroyZoomPanRotate();
this.removeEventHandlers();
Util.Events.fire(this, {
type: PhotoSwipe.EventTypes.onBeforeHide,
target: this
});
this.uiLayer.dispose();
this.uiLayer = null;
if (!Util.isNothing(this.toolbar)){
this.toolbar.dispose();
this.toolbar = null;
}
this.carousel.dispose();
this.carousel = null;
Util.DOM.removeClass(window.document.body, PhotoSwipe.CssClasses.activeBody);
this.documentOverlay.dispose();
this.documentOverlay = null;
this._isResettingPosition = false;
// Deactive this instance
PhotoSwipe.unsetActivateInstance(this);
Util.Events.fire(this, {
type: PhotoSwipe.EventTypes.onHide,
target: this
});
this.goBackInHistory();
},
/*
* Function: goBackInHistory
*/
goBackInHistory: function(){
if (this.isBackEventSupported && this.settings.backButtonHideEnabled){
if ( !this.backButtonClicked ){
window.history.back();
}
}
},
/*
* Function: play
*/
play: function(){
if (this.isZoomActive()){
return;
}
if (!this.settings.preventSlideshow){
if (!Util.isNothing(this.carousel)){
if (!Util.isNothing(this.toolbar) && this.toolbar.isVisible){
this.toolbar.fadeOut();
}
this.carousel.startSlideshow();
}
}
},
/*
* Function: stop
*/
stop: function(){
if (this.isZoomActive()){
return;
}
if (!Util.isNothing(this.carousel)){
this.carousel.stopSlideshow();
}
},
/*
* Function: previous
*/
previous: function(){
if (this.isZoomActive()){
return;
}
if (!Util.isNothing(this.carousel)){
this.carousel.previous();
}
},
/*
* Function: next
*/
next: function(){
if (this.isZoomActive()){
return;
}
if (!Util.isNothing(this.carousel)){
this.carousel.next();
}
},
/*
* Function: toggleToolbar
*/
toggleToolbar: function(){
if (this.isZoomActive()){
return;
}
if (!Util.isNothing(this.toolbar)){
this.toolbar.toggleVisibility(this.currentIndex);
}
},
/*
* Function: fadeOutToolbarIfVisible
*/
fadeOutToolbarIfVisible: function(){
if (!Util.isNothing(this.toolbar) && this.toolbar.isVisible && this.settings.captionAndToolbarAutoHideDelay > 0){
this.toolbar.fadeOut();
}
},
/*
* Function: createZoomPanRotate
*/
createZoomPanRotate: function(){
this.stop();
if (this.canUserZoom() && !this.isZoomActive()){
Util.Events.fire(this, PhotoSwipe.EventTypes.onBeforeZoomPanRotateShow);
this.zoomPanRotate = new ZoomPanRotate.ZoomPanRotateClass(
this.settings,
this.cache.images[this.currentIndex],
this.uiLayer
);
// If we don't override this in the event of false
// you will be unable to pan around a zoomed image effectively
this.uiLayer.captureSettings.preventDefaultTouchEvents = true;
Util.Events.add(this.zoomPanRotate, PhotoSwipe.ZoomPanRotate.EventTypes.onTransform, this.zoomPanRotateTransformHandler);
Util.Events.fire(this, PhotoSwipe.EventTypes.onZoomPanRotateShow);
if (!Util.isNothing(this.toolbar) && this.toolbar.isVisible){
this.toolbar.fadeOut();
}
}
},
/*
* Function: destroyZoomPanRotate
*/
destroyZoomPanRotate: function(){
if (!Util.isNothing(this.zoomPanRotate)){
Util.Events.fire(this, PhotoSwipe.EventTypes.onBeforeZoomPanRotateHide);
Util.Events.remove(this.zoomPanRotate, PhotoSwipe.ZoomPanRotate.EventTypes.onTransform, this.zoomPanRotateTransformHandler);
this.zoomPanRotate.dispose();
this.zoomPanRotate = null;
// Set the preventDefaultTouchEvents back to it was
this.uiLayer.captureSettings.preventDefaultTouchEvents = this.settings.preventDefaultTouchEvents;
Util.Events.fire(this, PhotoSwipe.EventTypes.onZoomPanRotateHide);
}
},
/*
* Function: canUserZoom
*/
canUserZoom: function(){
var testEl, cacheImage;
if (Util.Browser.msie){
testEl = document.createElement('div');
if (Util.isNothing(testEl.style.msTransform)){
return false;
}
}
else if (!Util.Browser.isCSSTransformSupported){
return false;
}
if (!this.settings.allowUserZoom){
return false;
}
if (this.carousel.isSliding){
return false;
}
cacheImage = this.cache.images[this.currentIndex];
if (Util.isNothing(cacheImage)){
return false;
}
if (cacheImage.isLoading){
return false;
}
return true;
},
/*
* Function: isZoomActive
*/
isZoomActive: function(){
return (!Util.isNothing(this.zoomPanRotate));
},
/*
* Function: getCurrentImage
*/
getCurrentImage: function(){
return this.cache.images[this.currentIndex];
},
/*
* Function: onDocumentOverlayFadeIn
*/
onDocumentOverlayFadeIn: function(e){
window.setTimeout(function(){
if (Util.isNothing(this.settings))
return;
var el = (this.settings.target === window) ? window.document.body : this.settings.target;
Util.DOM.removeClass(el, PhotoSwipe.CssClasses.buildingBody);
Util.DOM.addClass(el, PhotoSwipe.CssClasses.activeBody);
this.addEventHandlers();
this.carousel.show(this.currentIndex);
this.uiLayer.show();
if (this.settings.autoStartSlideshow){
this.play();
}
else if (!Util.isNothing(this.toolbar)){
this.toolbar.show(this.currentIndex);
}
Util.Events.fire(this, {
type: PhotoSwipe.EventTypes.onShow,
target: this
});
this.setUIWebViewResetPositionTimeout();
}.bind(this), 250);
},
/*
* Function: setUIWebViewResetPositionTimeout
*/
setUIWebViewResetPositionTimeout: function(){
if (!this.settings.enableUIWebViewRepositionTimeout){
return;
}
if (!(Util.Browser.iOS && (!Util.Browser.safari))){
return;
}
if (!Util.isNothing(this._uiWebViewResetPositionTimeout)){
window.clearTimeout(this._uiWebViewResetPositionTimeout);
}
this._uiWebViewResetPositionTimeout = window.setTimeout(function(){
this.resetPosition();
this.setUIWebViewResetPositionTimeout();
}.bind(this), this.settings.uiWebViewResetPositionDelay);
},
/*
* Function: clearUIWebViewResetPositionTimeout
*/
clearUIWebViewResetPositionTimeout: function(){
if (!Util.isNothing(this._uiWebViewResetPositionTimeout)){
window.clearTimeout(this._uiWebViewResetPositionTimeout);
}
},
/*
* Function: onWindowScroll
*/
onWindowScroll: function(e){
this.resetPosition();
},
/*
* Function: onWindowOrientationChange
*/
onWindowOrientationChange: function(e){
this.resetPosition();
},
/*
* Function: onWindowHashChange
*/
onWindowHashChange: function(e){
var compareHash = '#' +
((this.settings.jQueryMobile) ? this.settings.jQueryMobileDialogHash : this.currentHistoryHashValue);
if (window.location.hash !== compareHash){
this.backButtonClicked = true;
this.hide();
}
},
/*
* Function: onKeyDown
*/
onKeyDown: function(e){
if (e.keyCode === 37) { // Left
e.preventDefault();
this.previous();
}
else if (e.keyCode === 39) { // Right
e.preventDefault();
this.next();
}
else if (e.keyCode === 38 || e.keyCode === 40) { // Up and down
e.preventDefault();
}
else if (e.keyCode === 27) { // Escape
e.preventDefault();
this.hide();
}
else if (e.keyCode === 32) { // Spacebar
if (!this.settings.hideToolbar){
this.toggleToolbar();
}
else{
this.hide();
}
e.preventDefault();
}
else if (e.keyCode === 13) { // Enter
e.preventDefault();
this.play();
}
},
/*
* Function: onUILayerTouch
*/
onUILayerTouch: function(e){
if (this.isZoomActive()){
switch (e.action){
case Util.TouchElement.ActionTypes.gestureChange:
this.zoomPanRotate.zoomRotate(e.scale, (this.settings.allowRotationOnUserZoom) ? e.rotation : 0);
break;
case Util.TouchElement.ActionTypes.gestureEnd:
this.zoomPanRotate.setStartingScaleAndRotation(e.scale, (this.settings.allowRotationOnUserZoom) ? e.rotation : 0);
break;
case Util.TouchElement.ActionTypes.touchStart:
this.zoomPanRotate.panStart(e.point);
break;
case Util.TouchElement.ActionTypes.touchMove:
this.zoomPanRotate.pan(e.point);
break;
case Util.TouchElement.ActionTypes.doubleTap:
this.destroyZoomPanRotate();
this.toggleToolbar();
break;
case Util.TouchElement.ActionTypes.swipeLeft:
this.destroyZoomPanRotate();
this.next();