aboutsummaryrefslogtreecommitdiff
path: root/semantic/src/definitions/behaviors/visibility.js
diff options
context:
space:
mode:
Diffstat (limited to 'semantic/src/definitions/behaviors/visibility.js')
-rw-r--r--semantic/src/definitions/behaviors/visibility.js1313
1 files changed, 0 insertions, 1313 deletions
diff --git a/semantic/src/definitions/behaviors/visibility.js b/semantic/src/definitions/behaviors/visibility.js
deleted file mode 100644
index 4e40619..0000000
--- a/semantic/src/definitions/behaviors/visibility.js
+++ /dev/null
@@ -1,1313 +0,0 @@
-/*!
- * # Fomantic-UI - Visibility
- * http://github.com/fomantic/Fomantic-UI/
- *
- *
- * Released under the MIT license
- * http://opensource.org/licenses/MIT
- *
- */
-
-;(function ($, window, document, undefined) {
-
-'use strict';
-
-$.isFunction = $.isFunction || function(obj) {
- return typeof obj === "function" && typeof obj.nodeType !== "number";
-};
-
-window = (typeof window != 'undefined' && window.Math == Math)
- ? window
- : (typeof self != 'undefined' && self.Math == Math)
- ? self
- : Function('return this')()
-;
-
-$.fn.visibility = function(parameters) {
- var
- $allModules = $(this),
- moduleSelector = $allModules.selector || '',
-
- time = new Date().getTime(),
- performance = [],
-
- query = arguments[0],
- methodInvoked = (typeof query == 'string'),
- queryArguments = [].slice.call(arguments, 1),
- returnedValue,
-
- moduleCount = $allModules.length,
- loadedCount = 0
- ;
-
- $allModules
- .each(function() {
- var
- settings = ( $.isPlainObject(parameters) )
- ? $.extend(true, {}, $.fn.visibility.settings, parameters)
- : $.extend({}, $.fn.visibility.settings),
-
- className = settings.className,
- namespace = settings.namespace,
- error = settings.error,
- metadata = settings.metadata,
-
- eventNamespace = '.' + namespace,
- moduleNamespace = 'module-' + namespace,
-
- $window = $(window),
-
- $module = $(this),
- $context = $(settings.context),
-
- $placeholder,
-
- instance = $module.data(moduleNamespace),
-
- requestAnimationFrame = window.requestAnimationFrame
- || window.mozRequestAnimationFrame
- || window.webkitRequestAnimationFrame
- || window.msRequestAnimationFrame
- || function(callback) { setTimeout(callback, 0); },
-
- element = this,
- disabled = false,
-
- contextObserver,
- observer,
- module
- ;
-
- module = {
-
- initialize: function() {
- module.debug('Initializing', settings);
-
- module.setup.cache();
-
- if( module.should.trackChanges() ) {
-
- if(settings.type == 'image') {
- module.setup.image();
- }
- if(settings.type == 'fixed') {
- module.setup.fixed();
- }
-
- if(settings.observeChanges) {
- module.observeChanges();
- }
- module.bind.events();
- }
-
- module.save.position();
- if( !module.is.visible() ) {
- module.error(error.visible, $module);
- }
-
- if(settings.initialCheck) {
- module.checkVisibility();
- }
- module.instantiate();
- },
-
- instantiate: function() {
- module.debug('Storing instance', module);
- $module
- .data(moduleNamespace, module)
- ;
- instance = module;
- },
-
- destroy: function() {
- module.verbose('Destroying previous module');
- if(observer) {
- observer.disconnect();
- }
- if(contextObserver) {
- contextObserver.disconnect();
- }
- $window
- .off('load' + eventNamespace, module.event.load)
- .off('resize' + eventNamespace, module.event.resize)
- ;
- $context
- .off('scroll' + eventNamespace, module.event.scroll)
- .off('scrollchange' + eventNamespace, module.event.scrollchange)
- ;
- if(settings.type == 'fixed') {
- module.resetFixed();
- module.remove.placeholder();
- }
- $module
- .off(eventNamespace)
- .removeData(moduleNamespace)
- ;
- },
-
- observeChanges: function() {
- if('MutationObserver' in window) {
- contextObserver = new MutationObserver(module.event.contextChanged);
- observer = new MutationObserver(module.event.changed);
- contextObserver.observe(document, {
- childList : true,
- subtree : true
- });
- observer.observe(element, {
- childList : true,
- subtree : true
- });
- module.debug('Setting up mutation observer', observer);
- }
- },
-
- bind: {
- events: function() {
- module.verbose('Binding visibility events to scroll and resize');
- if(settings.refreshOnLoad) {
- $window
- .on('load' + eventNamespace, module.event.load)
- ;
- }
- $window
- .on('resize' + eventNamespace, module.event.resize)
- ;
- // pub/sub pattern
- $context
- .off('scroll' + eventNamespace)
- .on('scroll' + eventNamespace, module.event.scroll)
- .on('scrollchange' + eventNamespace, module.event.scrollchange)
- ;
- }
- },
-
- event: {
- changed: function(mutations) {
- module.verbose('DOM tree modified, updating visibility calculations');
- module.timer = setTimeout(function() {
- module.verbose('DOM tree modified, updating sticky menu');
- module.refresh();
- }, 100);
- },
- contextChanged: function(mutations) {
- [].forEach.call(mutations, function(mutation) {
- if(mutation.removedNodes) {
- [].forEach.call(mutation.removedNodes, function(node) {
- if(node == element || $(node).find(element).length > 0) {
- module.debug('Element removed from DOM, tearing down events');
- module.destroy();
- }
- });
- }
- });
- },
- resize: function() {
- module.debug('Window resized');
- if(settings.refreshOnResize) {
- requestAnimationFrame(module.refresh);
- }
- },
- load: function() {
- module.debug('Page finished loading');
- requestAnimationFrame(module.refresh);
- },
- // publishes scrollchange event on one scroll
- scroll: function() {
- if(settings.throttle) {
- clearTimeout(module.timer);
- module.timer = setTimeout(function() {
- $context.triggerHandler('scrollchange' + eventNamespace, [ $context.scrollTop() ]);
- }, settings.throttle);
- }
- else {
- requestAnimationFrame(function() {
- $context.triggerHandler('scrollchange' + eventNamespace, [ $context.scrollTop() ]);
- });
- }
- },
- // subscribes to scrollchange
- scrollchange: function(event, scrollPosition) {
- module.checkVisibility(scrollPosition);
- },
- },
-
- precache: function(images, callback) {
- if (!(images instanceof Array)) {
- images = [images];
- }
- var
- imagesLength = images.length,
- loadedCounter = 0,
- cache = [],
- cacheImage = document.createElement('img'),
- handleLoad = function() {
- loadedCounter++;
- if (loadedCounter >= images.length) {
- if ($.isFunction(callback)) {
- callback();
- }
- }
- }
- ;
- while (imagesLength--) {
- cacheImage = document.createElement('img');
- cacheImage.onload = handleLoad;
- cacheImage.onerror = handleLoad;
- cacheImage.src = images[imagesLength];
- cache.push(cacheImage);
- }
- },
-
- enableCallbacks: function() {
- module.debug('Allowing callbacks to occur');
- disabled = false;
- },
-
- disableCallbacks: function() {
- module.debug('Disabling all callbacks temporarily');
- disabled = true;
- },
-
- should: {
- trackChanges: function() {
- if(methodInvoked) {
- module.debug('One time query, no need to bind events');
- return false;
- }
- module.debug('Callbacks being attached');
- return true;
- }
- },
-
- setup: {
- cache: function() {
- module.cache = {
- occurred : {},
- screen : {},
- element : {},
- };
- },
- image: function() {
- var
- src = $module.data(metadata.src)
- ;
- if(src) {
- module.verbose('Lazy loading image', src);
- settings.once = true;
- settings.observeChanges = false;
-
- // show when top visible
- settings.onOnScreen = function() {
- module.debug('Image on screen', element);
- module.precache(src, function() {
- module.set.image(src, function() {
- loadedCount++;
- if(loadedCount == moduleCount) {
- settings.onAllLoaded.call(this);
- }
- settings.onLoad.call(this);
- });
- });
- };
- }
- },
- fixed: function() {
- module.debug('Setting up fixed');
- settings.once = false;
- settings.observeChanges = false;
- settings.initialCheck = true;
- settings.refreshOnLoad = true;
- if(!parameters.transition) {
- settings.transition = false;
- }
- module.create.placeholder();
- module.debug('Added placeholder', $placeholder);
- settings.onTopPassed = function() {
- module.debug('Element passed, adding fixed position', $module);
- module.show.placeholder();
- module.set.fixed();
- if(settings.transition) {
- if($.fn.transition !== undefined) {
- $module.transition(settings.transition, settings.duration);
- }
- }
- };
- settings.onTopPassedReverse = function() {
- module.debug('Element returned to position, removing fixed', $module);
- module.hide.placeholder();
- module.remove.fixed();
- };
- }
- },
-
- create: {
- placeholder: function() {
- module.verbose('Creating fixed position placeholder');
- $placeholder = $module
- .clone(false)
- .css('display', 'none')
- .addClass(className.placeholder)
- .insertAfter($module)
- ;
- }
- },
-
- show: {
- placeholder: function() {
- module.verbose('Showing placeholder');
- $placeholder
- .css('display', 'block')
- .css('visibility', 'hidden')
- ;
- }
- },
- hide: {
- placeholder: function() {
- module.verbose('Hiding placeholder');
- $placeholder
- .css('display', 'none')
- .css('visibility', '')
- ;
- }
- },
-
- set: {
- fixed: function() {
- module.verbose('Setting element to fixed position');
- $module
- .addClass(className.fixed)
- .css({
- position : 'fixed',
- top : settings.offset + 'px',
- left : 'auto',
- zIndex : settings.zIndex
- })
- ;
- settings.onFixed.call(element);
- },
- image: function(src, callback) {
- $module
- .attr('src', src)
- ;
- if(settings.transition) {
- if( $.fn.transition !== undefined) {
- if($module.hasClass(className.visible)) {
- module.debug('Transition already occurred on this image, skipping animation');
- return;
- }
- $module.transition(settings.transition, settings.duration, callback);
- }
- else {
- $module.fadeIn(settings.duration, callback);
- }
- }
- else {
- $module.show();
- }
- }
- },
-
- is: {
- onScreen: function() {
- var
- calculations = module.get.elementCalculations()
- ;
- return calculations.onScreen;
- },
- offScreen: function() {
- var
- calculations = module.get.elementCalculations()
- ;
- return calculations.offScreen;
- },
- visible: function() {
- if(module.cache && module.cache.element) {
- return !(module.cache.element.width === 0 && module.cache.element.offset.top === 0);
- }
- return false;
- },
- verticallyScrollableContext: function() {
- var
- overflowY = ($context.get(0) !== window)
- ? $context.css('overflow-y')
- : false
- ;
- return (overflowY == 'auto' || overflowY == 'scroll');
- },
- horizontallyScrollableContext: function() {
- var
- overflowX = ($context.get(0) !== window)
- ? $context.css('overflow-x')
- : false
- ;
- return (overflowX == 'auto' || overflowX == 'scroll');
- }
- },
-
- refresh: function() {
- module.debug('Refreshing constants (width/height)');
- if(settings.type == 'fixed') {
- module.resetFixed();
- }
- module.reset();
- module.save.position();
- if(settings.checkOnRefresh) {
- module.checkVisibility();
- }
- settings.onRefresh.call(element);
- },
-
- resetFixed: function () {
- module.remove.fixed();
- module.remove.occurred();
- },
-
- reset: function() {
- module.verbose('Resetting all cached values');
- if( $.isPlainObject(module.cache) ) {
- module.cache.screen = {};
- module.cache.element = {};
- }
- },
-
- checkVisibility: function(scroll) {
- module.verbose('Checking visibility of element', module.cache.element);
-
- if( !disabled && module.is.visible() ) {
-
- // save scroll position
- module.save.scroll(scroll);
-
- // update calculations derived from scroll
- module.save.calculations();
-
- // percentage
- module.passed();
-
- // reverse (must be first)
- module.passingReverse();
- module.topVisibleReverse();
- module.bottomVisibleReverse();
- module.topPassedReverse();
- module.bottomPassedReverse();
-
- // one time
- module.onScreen();
- module.offScreen();
- module.passing();
- module.topVisible();
- module.bottomVisible();
- module.topPassed();
- module.bottomPassed();
-
- // on update callback
- if(settings.onUpdate) {
- settings.onUpdate.call(element, module.get.elementCalculations());
- }
- }
- },
-
- passed: function(amount, newCallback) {
- var
- calculations = module.get.elementCalculations()
- ;
- // assign callback
- if(amount && newCallback) {
- settings.onPassed[amount] = newCallback;
- }
- else if(amount !== undefined) {
- return (module.get.pixelsPassed(amount) > calculations.pixelsPassed);
- }
- else if(calculations.passing) {
- $.each(settings.onPassed, function(amount, callback) {
- if(calculations.bottomVisible || calculations.pixelsPassed > module.get.pixelsPassed(amount)) {
- module.execute(callback, amount);
- }
- else if(!settings.once) {
- module.remove.occurred(callback);
- }
- });
- }
- },
-
- onScreen: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onOnScreen,
- callbackName = 'onScreen'
- ;
- if(newCallback) {
- module.debug('Adding callback for onScreen', newCallback);
- settings.onOnScreen = newCallback;
- }
- if(calculations.onScreen) {
- module.execute(callback, callbackName);
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback !== undefined) {
- return calculations.onOnScreen;
- }
- },
-
- offScreen: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onOffScreen,
- callbackName = 'offScreen'
- ;
- if(newCallback) {
- module.debug('Adding callback for offScreen', newCallback);
- settings.onOffScreen = newCallback;
- }
- if(calculations.offScreen) {
- module.execute(callback, callbackName);
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback !== undefined) {
- return calculations.onOffScreen;
- }
- },
-
- passing: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onPassing,
- callbackName = 'passing'
- ;
- if(newCallback) {
- module.debug('Adding callback for passing', newCallback);
- settings.onPassing = newCallback;
- }
- if(calculations.passing) {
- module.execute(callback, callbackName);
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback !== undefined) {
- return calculations.passing;
- }
- },
-
-
- topVisible: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onTopVisible,
- callbackName = 'topVisible'
- ;
- if(newCallback) {
- module.debug('Adding callback for top visible', newCallback);
- settings.onTopVisible = newCallback;
- }
- if(calculations.topVisible) {
- module.execute(callback, callbackName);
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback === undefined) {
- return calculations.topVisible;
- }
- },
-
- bottomVisible: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onBottomVisible,
- callbackName = 'bottomVisible'
- ;
- if(newCallback) {
- module.debug('Adding callback for bottom visible', newCallback);
- settings.onBottomVisible = newCallback;
- }
- if(calculations.bottomVisible) {
- module.execute(callback, callbackName);
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback === undefined) {
- return calculations.bottomVisible;
- }
- },
-
- topPassed: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onTopPassed,
- callbackName = 'topPassed'
- ;
- if(newCallback) {
- module.debug('Adding callback for top passed', newCallback);
- settings.onTopPassed = newCallback;
- }
- if(calculations.topPassed) {
- module.execute(callback, callbackName);
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback === undefined) {
- return calculations.topPassed;
- }
- },
-
- bottomPassed: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onBottomPassed,
- callbackName = 'bottomPassed'
- ;
- if(newCallback) {
- module.debug('Adding callback for bottom passed', newCallback);
- settings.onBottomPassed = newCallback;
- }
- if(calculations.bottomPassed) {
- module.execute(callback, callbackName);
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback === undefined) {
- return calculations.bottomPassed;
- }
- },
-
- passingReverse: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onPassingReverse,
- callbackName = 'passingReverse'
- ;
- if(newCallback) {
- module.debug('Adding callback for passing reverse', newCallback);
- settings.onPassingReverse = newCallback;
- }
- if(!calculations.passing) {
- if(module.get.occurred('passing')) {
- module.execute(callback, callbackName);
- }
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback !== undefined) {
- return !calculations.passing;
- }
- },
-
-
- topVisibleReverse: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onTopVisibleReverse,
- callbackName = 'topVisibleReverse'
- ;
- if(newCallback) {
- module.debug('Adding callback for top visible reverse', newCallback);
- settings.onTopVisibleReverse = newCallback;
- }
- if(!calculations.topVisible) {
- if(module.get.occurred('topVisible')) {
- module.execute(callback, callbackName);
- }
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback === undefined) {
- return !calculations.topVisible;
- }
- },
-
- bottomVisibleReverse: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onBottomVisibleReverse,
- callbackName = 'bottomVisibleReverse'
- ;
- if(newCallback) {
- module.debug('Adding callback for bottom visible reverse', newCallback);
- settings.onBottomVisibleReverse = newCallback;
- }
- if(!calculations.bottomVisible) {
- if(module.get.occurred('bottomVisible')) {
- module.execute(callback, callbackName);
- }
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback === undefined) {
- return !calculations.bottomVisible;
- }
- },
-
- topPassedReverse: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onTopPassedReverse,
- callbackName = 'topPassedReverse'
- ;
- if(newCallback) {
- module.debug('Adding callback for top passed reverse', newCallback);
- settings.onTopPassedReverse = newCallback;
- }
- if(!calculations.topPassed) {
- if(module.get.occurred('topPassed')) {
- module.execute(callback, callbackName);
- }
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback === undefined) {
- return !calculations.onTopPassed;
- }
- },
-
- bottomPassedReverse: function(newCallback) {
- var
- calculations = module.get.elementCalculations(),
- callback = newCallback || settings.onBottomPassedReverse,
- callbackName = 'bottomPassedReverse'
- ;
- if(newCallback) {
- module.debug('Adding callback for bottom passed reverse', newCallback);
- settings.onBottomPassedReverse = newCallback;
- }
- if(!calculations.bottomPassed) {
- if(module.get.occurred('bottomPassed')) {
- module.execute(callback, callbackName);
- }
- }
- else if(!settings.once) {
- module.remove.occurred(callbackName);
- }
- if(newCallback === undefined) {
- return !calculations.bottomPassed;
- }
- },
-
- execute: function(callback, callbackName) {
- var
- calculations = module.get.elementCalculations(),
- screen = module.get.screenCalculations()
- ;
- callback = callback || false;
- if(callback) {
- if(settings.continuous) {
- module.debug('Callback being called continuously', callbackName, calculations);
- callback.call(element, calculations, screen);
- }
- else if(!module.get.occurred(callbackName)) {
- module.debug('Conditions met', callbackName, calculations);
- callback.call(element, calculations, screen);
- }
- }
- module.save.occurred(callbackName);
- },
-
- remove: {
- fixed: function() {
- module.debug('Removing fixed position');
- $module
- .removeClass(className.fixed)
- .css({
- position : '',
- top : '',
- left : '',
- zIndex : ''
- })
- ;
- settings.onUnfixed.call(element);
- },
- placeholder: function() {
- module.debug('Removing placeholder content');
- if($placeholder) {
- $placeholder.remove();
- }
- },
- occurred: function(callback) {
- if(callback) {
- var
- occurred = module.cache.occurred
- ;
- if(occurred[callback] !== undefined && occurred[callback] === true) {
- module.debug('Callback can now be called again', callback);
- module.cache.occurred[callback] = false;
- }
- }
- else {
- module.cache.occurred = {};
- }
- }
- },
-
- save: {
- calculations: function() {
- module.verbose('Saving all calculations necessary to determine positioning');
- module.save.direction();
- module.save.screenCalculations();
- module.save.elementCalculations();
- },
- occurred: function(callback) {
- if(callback) {
- if(module.cache.occurred[callback] === undefined || (module.cache.occurred[callback] !== true)) {
- module.verbose('Saving callback occurred', callback);
- module.cache.occurred[callback] = true;
- }
- }
- },
- scroll: function(scrollPosition) {
- scrollPosition = scrollPosition + settings.offset || $context.scrollTop() + settings.offset;
- module.cache.scroll = scrollPosition;
- },
- direction: function() {
- var
- scroll = module.get.scroll(),
- lastScroll = module.get.lastScroll(),
- direction
- ;
- if(scroll > lastScroll && lastScroll) {
- direction = 'down';
- }
- else if(scroll < lastScroll && lastScroll) {
- direction = 'up';
- }
- else {
- direction = 'static';
- }
- module.cache.direction = direction;
- return module.cache.direction;
- },
- elementPosition: function() {
- var
- element = module.cache.element,
- screen = module.get.screenSize()
- ;
- module.verbose('Saving element position');
- // (quicker than $.extend)
- element.fits = (element.height < screen.height);
- element.offset = $module.offset();
- element.width = $module.outerWidth();
- element.height = $module.outerHeight();
- // compensate for scroll in context
- if(module.is.verticallyScrollableContext()) {
- element.offset.top += $context.scrollTop() - $context.offset().top;
- }
- if(module.is.horizontallyScrollableContext()) {
- element.offset.left += $context.scrollLeft() - $context.offset().left;
- }
- // store
- module.cache.element = element;
- return element;
- },
- elementCalculations: function() {
- var
- screen = module.get.screenCalculations(),
- element = module.get.elementPosition()
- ;
- // offset
- if(settings.includeMargin) {
- element.margin = {};
- element.margin.top = parseInt($module.css('margin-top'), 10);
- element.margin.bottom = parseInt($module.css('margin-bottom'), 10);
- element.top = element.offset.top - element.margin.top;
- element.bottom = element.offset.top + element.height + element.margin.bottom;
- }
- else {
- element.top = element.offset.top;
- element.bottom = element.offset.top + element.height;
- }
-
- // visibility
- element.topPassed = (screen.top >= element.top);
- element.bottomPassed = (screen.top >= element.bottom);
- element.topVisible = (screen.bottom >= element.top) && !element.topPassed;
- element.bottomVisible = (screen.bottom >= element.bottom) && !element.bottomPassed;
- element.pixelsPassed = 0;
- element.percentagePassed = 0;
-
- // meta calculations
- element.onScreen = ((element.topVisible || element.passing) && !element.bottomPassed);
- element.passing = (element.topPassed && !element.bottomPassed);
- element.offScreen = (!element.onScreen);
-
- // passing calculations
- if(element.passing) {
- element.pixelsPassed = (screen.top - element.top);
- element.percentagePassed = (screen.top - element.top) / element.height;
- }
- module.cache.element = element;
- module.verbose('Updated element calculations', element);
- return element;
- },
- screenCalculations: function() {
- var
- scroll = module.get.scroll()
- ;
- module.save.direction();
- module.cache.screen.top = scroll;
- module.cache.screen.bottom = scroll + module.cache.screen.height;
- return module.cache.screen;
- },
- screenSize: function() {
- module.verbose('Saving window position');
- module.cache.screen = {
- height: $context.height()
- };
- },
- position: function() {
- module.save.screenSize();
- module.save.elementPosition();
- }
- },
-
- get: {
- pixelsPassed: function(amount) {
- var
- element = module.get.elementCalculations()
- ;
- if(amount.search('%') > -1) {
- return ( element.height * (parseInt(amount, 10) / 100) );
- }
- return parseInt(amount, 10);
- },
- occurred: function(callback) {
- return (module.cache.occurred !== undefined)
- ? module.cache.occurred[callback] || false
- : false
- ;
- },
- direction: function() {
- if(module.cache.direction === undefined) {
- module.save.direction();
- }
- return module.cache.direction;
- },
- elementPosition: function() {
- if(module.cache.element === undefined) {
- module.save.elementPosition();
- }
- return module.cache.element;
- },
- elementCalculations: function() {
- if(module.cache.element === undefined) {
- module.save.elementCalculations();
- }
- return module.cache.element;
- },
- screenCalculations: function() {
- if(module.cache.screen === undefined) {
- module.save.screenCalculations();
- }
- return module.cache.screen;
- },
- screenSize: function() {
- if(module.cache.screen === undefined) {
- module.save.screenSize();
- }
- return module.cache.screen;
- },
- scroll: function() {
- if(module.cache.scroll === undefined) {
- module.save.scroll();
- }
- return module.cache.scroll;
- },
- lastScroll: function() {
- if(module.cache.screen === undefined) {
- module.debug('First scroll event, no last scroll could be found');
- return false;
- }
- return module.cache.screen.top;
- }
- },
-
- setting: function(name, value) {
- if( $.isPlainObject(name) ) {
- $.extend(true, settings, name);
- }
- else if(value !== undefined) {
- settings[name] = value;
- }
- else {
- return settings[name];
- }
- },
- internal: function(name, value) {
- if( $.isPlainObject(name) ) {
- $.extend(true, module, name);
- }
- else if(value !== undefined) {
- module[name] = value;
- }
- else {
- return module[name];
- }
- },
- debug: function() {
- if(!settings.silent && settings.debug) {
- if(settings.performance) {
- module.performance.log(arguments);
- }
- else {
- module.debug = Function.prototype.bind.call(console.info, console, settings.name + ':');
- module.debug.apply(console, arguments);
- }
- }
- },
- verbose: function() {
- if(!settings.silent && settings.verbose && settings.debug) {
- if(settings.performance) {
- module.performance.log(arguments);
- }
- else {
- module.verbose = Function.prototype.bind.call(console.info, console, settings.name + ':');
- module.verbose.apply(console, arguments);
- }
- }
- },
- error: function() {
- if(!settings.silent) {
- module.error = Function.prototype.bind.call(console.error, console, settings.name + ':');
- module.error.apply(console, arguments);
- }
- },
- performance: {
- log: function(message) {
- var
- currentTime,
- executionTime,
- previousTime
- ;
- if(settings.performance) {
- currentTime = new Date().getTime();
- previousTime = time || currentTime;
- executionTime = currentTime - previousTime;
- time = currentTime;
- performance.push({
- 'Name' : message[0],
- 'Arguments' : [].slice.call(message, 1) || '',
- 'Element' : element,
- 'Execution Time' : executionTime
- });
- }
- clearTimeout(module.performance.timer);
- module.performance.timer = setTimeout(module.performance.display, 500);
- },
- display: function() {
- var
- title = settings.name + ':',
- totalTime = 0
- ;
- time = false;
- clearTimeout(module.performance.timer);
- $.each(performance, function(index, data) {
- totalTime += data['Execution Time'];
- });
- title += ' ' + totalTime + 'ms';
- if(moduleSelector) {
- title += ' \'' + moduleSelector + '\'';
- }
- if( (console.group !== undefined || console.table !== undefined) && performance.length > 0) {
- console.groupCollapsed(title);
- if(console.table) {
- console.table(performance);
- }
- else {
- $.each(performance, function(index, data) {
- console.log(data['Name'] + ': ' + data['Execution Time']+'ms');
- });
- }
- console.groupEnd();
- }
- performance = [];
- }
- },
- invoke: function(query, passedArguments, context) {
- var
- object = instance,
- maxDepth,
- found,
- response
- ;
- passedArguments = passedArguments || queryArguments;
- context = element || context;
- if(typeof query == 'string' && object !== undefined) {
- query = query.split(/[\. ]/);
- maxDepth = query.length - 1;
- $.each(query, function(depth, value) {
- var camelCaseValue = (depth != maxDepth)
- ? value + query[depth + 1].charAt(0).toUpperCase() + query[depth + 1].slice(1)
- : query
- ;
- if( $.isPlainObject( object[camelCaseValue] ) && (depth != maxDepth) ) {
- object = object[camelCaseValue];
- }
- else if( object[camelCaseValue] !== undefined ) {
- found = object[camelCaseValue];
- return false;
- }
- else if( $.isPlainObject( object[value] ) && (depth != maxDepth) ) {
- object = object[value];
- }
- else if( object[value] !== undefined ) {
- found = object[value];
- return false;
- }
- else {
- module.error(error.method, query);
- return false;
- }
- });
- }
- if ( $.isFunction( found ) ) {
- response = found.apply(context, passedArguments);
- }
- else if(found !== undefined) {
- response = found;
- }
- if(Array.isArray(returnedValue)) {
- returnedValue.push(response);
- }
- else if(returnedValue !== undefined) {
- returnedValue = [returnedValue, response];
- }
- else if(response !== undefined) {
- returnedValue = response;
- }
- return found;
- }
- };
-
- if(methodInvoked) {
- if(instance === undefined) {
- module.initialize();
- }
- instance.save.scroll();
- instance.save.calculations();
- module.invoke(query);
- }
- else {
- if(instance !== undefined) {
- instance.invoke('destroy');
- }
- module.initialize();
- }
- })
- ;
-
- return (returnedValue !== undefined)
- ? returnedValue
- : this
- ;
-};
-
-$.fn.visibility.settings = {
-
- name : 'Visibility',
- namespace : 'visibility',
-
- debug : false,
- verbose : false,
- performance : true,
-
- // whether to use mutation observers to follow changes
- observeChanges : true,
-
- // check position immediately on init
- initialCheck : true,
-
- // whether to refresh calculations after all page images load
- refreshOnLoad : true,
-
- // whether to refresh calculations after page resize event
- refreshOnResize : true,
-
- // should call callbacks on refresh event (resize, etc)
- checkOnRefresh : true,
-
- // callback should only occur one time
- once : true,
-
- // callback should fire continuously whe evaluates to true
- continuous : false,
-
- // offset to use with scroll top
- offset : 0,
-
- // whether to include margin in elements position
- includeMargin : false,
-
- // scroll context for visibility checks
- context : window,
-
- // visibility check delay in ms (defaults to animationFrame)
- throttle : false,
-
- // special visibility type (image, fixed)
- type : false,
-
- // z-index to use with visibility 'fixed'
- zIndex : '10',
-
- // image only animation settings
- transition : 'fade in',
- duration : 1000,
-
- // array of callbacks for percentage
- onPassed : {},
-
- // standard callbacks
- onOnScreen : false,
- onOffScreen : false,
- onPassing : false,
- onTopVisible : false,
- onBottomVisible : false,
- onTopPassed : false,
- onBottomPassed : false,
-
- // reverse callbacks
- onPassingReverse : false,
- onTopVisibleReverse : false,
- onBottomVisibleReverse : false,
- onTopPassedReverse : false,
- onBottomPassedReverse : false,
-
- // special callbacks for image
- onLoad : function() {},
- onAllLoaded : function() {},
-
- // special callbacks for fixed position
- onFixed : function() {},
- onUnfixed : function() {},
-
- // utility callbacks
- onUpdate : false, // disabled by default for performance
- onRefresh : function(){},
-
- metadata : {
- src: 'src'
- },
-
- className: {
- fixed : 'fixed',
- placeholder : 'constraint',
- visible : 'visible'
- },
-
- error : {
- method : 'The method you called is not defined.',
- visible : 'Element is hidden, you must call refresh after element becomes visible'
- }
-
-};
-
-})( jQuery, window, document );
generated by cgit v1.2.3 (git 2.25.1) at 2026-03-11 07:36:11 +0000