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904 lines
25 KiB
904 lines
25 KiB
5 years ago
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/*!
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* Copyright 2012, Chris Wanstrath
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* Released under the MIT License
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* https://github.com/defunkt/jquery-pjax
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*/
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(function($){
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// When called on a container with a selector, fetches the href with
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// ajax into the container or with the data-pjax attribute on the link
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// itself.
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//
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// Tries to make sure the back button and ctrl+click work the way
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// you'd expect.
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//
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// Exported as $.fn.pjax
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//
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// Accepts a jQuery ajax options object that may include these
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// pjax specific options:
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//
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//
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// container - String selector for the element where to place the response body.
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// push - Whether to pushState the URL. Defaults to true (of course).
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// replace - Want to use replaceState instead? That's cool.
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//
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// For convenience the second parameter can be either the container or
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// the options object.
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//
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// Returns the jQuery object
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function fnPjax(selector, container, options) {
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options = optionsFor(container, options)
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return this.on('click.pjax', selector, function(event) {
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var opts = options
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if (!opts.container) {
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opts = $.extend({}, options)
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opts.container = $(this).attr('data-pjax')
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}
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handleClick(event, opts)
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})
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}
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// Public: pjax on click handler
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//
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// Exported as $.pjax.click.
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//
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// event - "click" jQuery.Event
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// options - pjax options
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//
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// Examples
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//
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// $(document).on('click', 'a', $.pjax.click)
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// // is the same as
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// $(document).pjax('a')
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//
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// Returns nothing.
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function handleClick(event, container, options) {
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options = optionsFor(container, options)
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var link = event.currentTarget
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var $link = $(link)
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if (link.tagName.toUpperCase() !== 'A')
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throw "$.fn.pjax or $.pjax.click requires an anchor element"
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// Middle click, cmd click, and ctrl click should open
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// links in a new tab as normal.
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if ( event.which > 1 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey )
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return
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// Ignore cross origin links
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if ( location.protocol !== link.protocol || location.hostname !== link.hostname )
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return
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// Ignore case when a hash is being tacked on the current URL
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if ( link.href.indexOf('#') > -1 && stripHash(link) == stripHash(location) )
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return
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// Ignore event with default prevented
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if (event.isDefaultPrevented())
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return
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var defaults = {
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url: link.href,
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container: $link.attr('data-pjax'),
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target: link
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}
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var opts = $.extend({}, defaults, options)
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var clickEvent = $.Event('pjax:click')
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$link.trigger(clickEvent, [opts])
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if (!clickEvent.isDefaultPrevented()) {
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pjax(opts)
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event.preventDefault()
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$link.trigger('pjax:clicked', [opts])
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}
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}
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// Public: pjax on form submit handler
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//
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// Exported as $.pjax.submit
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//
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// event - "click" jQuery.Event
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// options - pjax options
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//
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// Examples
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//
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// $(document).on('submit', 'form', function(event) {
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// $.pjax.submit(event, '[data-pjax-container]')
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// })
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//
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// Returns nothing.
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function handleSubmit(event, container, options) {
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options = optionsFor(container, options)
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var form = event.currentTarget
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var $form = $(form)
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if (form.tagName.toUpperCase() !== 'FORM')
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throw "$.pjax.submit requires a form element"
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var defaults = {
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type: ($form.attr('method') || 'GET').toUpperCase(),
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url: $form.attr('action'),
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container: $form.attr('data-pjax'),
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target: form
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}
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if (defaults.type !== 'GET' && window.FormData !== undefined) {
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defaults.data = new FormData(form)
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defaults.processData = false
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defaults.contentType = false
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} else {
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// Can't handle file uploads, exit
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if ($form.find(':file').length) {
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return
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}
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// Fallback to manually serializing the fields
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defaults.data = $form.serializeArray()
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}
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pjax($.extend({}, defaults, options))
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event.preventDefault()
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}
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// Loads a URL with ajax, puts the response body inside a container,
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// then pushState()'s the loaded URL.
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//
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// Works just like $.ajax in that it accepts a jQuery ajax
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// settings object (with keys like url, type, data, etc).
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//
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// Accepts these extra keys:
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//
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// container - String selector for where to stick the response body.
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// push - Whether to pushState the URL. Defaults to true (of course).
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// replace - Want to use replaceState instead? That's cool.
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//
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// Use it just like $.ajax:
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//
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// var xhr = $.pjax({ url: this.href, container: '#main' })
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// console.log( xhr.readyState )
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//
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// Returns whatever $.ajax returns.
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function pjax(options) {
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options = $.extend(true, {}, $.ajaxSettings, pjax.defaults, options)
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if ($.isFunction(options.url)) {
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options.url = options.url()
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}
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var hash = parseURL(options.url).hash
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var containerType = $.type(options.container)
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if (containerType !== 'string') {
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throw "expected string value for 'container' option; got " + containerType
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}
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var context = options.context = $(options.container)
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if (!context.length) {
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throw "the container selector '" + options.container + "' did not match anything"
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}
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// We want the browser to maintain two separate internal caches: one
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// for pjax'd partial page loads and one for normal page loads.
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// Without adding this secret parameter, some browsers will often
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// confuse the two.
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if (!options.data) options.data = {}
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if ($.isArray(options.data)) {
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options.data.push({name: '_pjax', value: options.container})
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} else {
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options.data._pjax = options.container
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}
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function fire(type, args, props) {
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if (!props) props = {}
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props.relatedTarget = options.target
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var event = $.Event(type, props)
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context.trigger(event, args)
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return !event.isDefaultPrevented()
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}
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var timeoutTimer
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options.beforeSend = function(xhr, settings) {
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// No timeout for non-GET requests
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// Its not safe to request the resource again with a fallback method.
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if (settings.type !== 'GET') {
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settings.timeout = 0
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}
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xhr.setRequestHeader('X-PJAX', 'true')
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xhr.setRequestHeader('X-PJAX-Container', options.container)
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if (!fire('pjax:beforeSend', [xhr, settings]))
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return false
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if (settings.timeout > 0) {
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timeoutTimer = setTimeout(function() {
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if (fire('pjax:timeout', [xhr, options]))
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xhr.abort('timeout')
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}, settings.timeout)
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// Clear timeout setting so jquerys internal timeout isn't invoked
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settings.timeout = 0
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}
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var url = parseURL(settings.url)
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if (hash) url.hash = hash
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options.requestUrl = stripInternalParams(url)
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}
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options.complete = function(xhr, textStatus) {
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if (timeoutTimer)
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clearTimeout(timeoutTimer)
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fire('pjax:complete', [xhr, textStatus, options])
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fire('pjax:end', [xhr, options])
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}
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options.error = function(xhr, textStatus, errorThrown) {
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var container = extractContainer("", xhr, options)
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var allowed = fire('pjax:error', [xhr, textStatus, errorThrown, options])
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if (options.type == 'GET' && textStatus !== 'abort' && allowed) {
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locationReplace(container.url)
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}
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}
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options.success = function(data, status, xhr) {
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var previousState = pjax.state
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// If $.pjax.defaults.version is a function, invoke it first.
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// Otherwise it can be a static string.
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var currentVersion = typeof $.pjax.defaults.version === 'function' ?
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$.pjax.defaults.version() :
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$.pjax.defaults.version
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var latestVersion = xhr.getResponseHeader('X-PJAX-Version')
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var container = extractContainer(data, xhr, options)
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var url = parseURL(container.url)
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if (hash) {
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url.hash = hash
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container.url = url.href
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}
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// If there is a layout version mismatch, hard load the new url
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if (currentVersion && latestVersion && currentVersion !== latestVersion) {
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locationReplace(container.url)
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return
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}
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// If the new response is missing a body, hard load the page
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if (!container.contents) {
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locationReplace(container.url)
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return
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}
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pjax.state = {
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id: options.id || uniqueId(),
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url: container.url,
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title: container.title,
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container: options.container,
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fragment: options.fragment,
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timeout: options.timeout
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}
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if (options.push || options.replace) {
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window.history.replaceState(pjax.state, container.title, container.url)
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}
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// Only blur the focus if the focused element is within the container.
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var blurFocus = $.contains(context, document.activeElement)
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// Clear out any focused controls before inserting new page contents.
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if (blurFocus) {
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try {
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document.activeElement.blur()
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} catch (e) { /* ignore */ }
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}
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if (container.title) document.title = container.title
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fire('pjax:beforeReplace', [container.contents, options], {
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state: pjax.state,
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previousState: previousState
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})
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context.html(container.contents)
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// FF bug: Won't autofocus fields that are inserted via JS.
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// This behavior is incorrect. So if theres no current focus, autofocus
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// the last field.
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//
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// http://www.w3.org/html/wg/drafts/html/master/forms.html
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var autofocusEl = context.find('input[autofocus], textarea[autofocus]').last()[0]
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if (autofocusEl && document.activeElement !== autofocusEl) {
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autofocusEl.focus()
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}
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executeScriptTags(container.scripts)
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var scrollTo = options.scrollTo
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// Ensure browser scrolls to the element referenced by the URL anchor
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if (hash) {
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var name = decodeURIComponent(hash.slice(1))
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var target = document.getElementById(name) || document.getElementsByName(name)[0]
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if (target) scrollTo = $(target).offset().top
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}
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if (typeof scrollTo == 'number') $(window).scrollTop(scrollTo)
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fire('pjax:success', [data, status, xhr, options])
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}
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// Initialize pjax.state for the initial page load. Assume we're
|
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// using the container and options of the link we're loading for the
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// back button to the initial page. This ensures good back button
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// behavior.
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if (!pjax.state) {
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pjax.state = {
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id: uniqueId(),
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url: window.location.href,
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title: document.title,
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container: options.container,
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fragment: options.fragment,
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timeout: options.timeout
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}
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window.history.replaceState(pjax.state, document.title)
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}
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// Cancel the current request if we're already pjaxing
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abortXHR(pjax.xhr)
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pjax.options = options
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var xhr = pjax.xhr = $.ajax(options)
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if (xhr.readyState > 0) {
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if (options.push && !options.replace) {
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// Cache current container element before replacing it
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cachePush(pjax.state.id, [options.container, cloneContents(context)])
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window.history.pushState(null, "", options.requestUrl)
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}
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fire('pjax:start', [xhr, options])
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fire('pjax:send', [xhr, options])
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}
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return pjax.xhr
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}
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||
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|
||
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// Public: Reload current page with pjax.
|
||
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//
|
||
|
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// Returns whatever $.pjax returns.
|
||
|
|
function pjaxReload(container, options) {
|
||
|
|
var defaults = {
|
||
|
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url: window.location.href,
|
||
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push: false,
|
||
|
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replace: true,
|
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scrollTo: false
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}
|
||
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|
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return pjax($.extend(defaults, optionsFor(container, options)))
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||
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}
|
||
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||
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// Internal: Hard replace current state with url.
|
||
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//
|
||
|
|
// Work for around WebKit
|
||
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|
// https://bugs.webkit.org/show_bug.cgi?id=93506
|
||
|
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//
|
||
|
|
// Returns nothing.
|
||
|
|
function locationReplace(url) {
|
||
|
|
window.history.replaceState(null, "", pjax.state.url)
|
||
|
|
window.location.replace(url)
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
var initialPop = true
|
||
|
|
var initialURL = window.location.href
|
||
|
|
var initialState = window.history.state
|
||
|
|
|
||
|
|
// Initialize $.pjax.state if possible
|
||
|
|
// Happens when reloading a page and coming forward from a different
|
||
|
|
// session history.
|
||
|
|
if (initialState && initialState.container) {
|
||
|
|
pjax.state = initialState
|
||
|
|
}
|
||
|
|
|
||
|
|
// Non-webkit browsers don't fire an initial popstate event
|
||
|
|
if ('state' in window.history) {
|
||
|
|
initialPop = false
|
||
|
|
}
|
||
|
|
|
||
|
|
// popstate handler takes care of the back and forward buttons
|
||
|
|
//
|
||
|
|
// You probably shouldn't use pjax on pages with other pushState
|
||
|
|
// stuff yet.
|
||
|
|
function onPjaxPopstate(event) {
|
||
|
|
|
||
|
|
// Hitting back or forward should override any pending PJAX request.
|
||
|
|
if (!initialPop) {
|
||
|
|
abortXHR(pjax.xhr)
|
||
|
|
}
|
||
|
|
|
||
|
|
var previousState = pjax.state
|
||
|
|
var state = event.state
|
||
|
|
var direction
|
||
|
|
|
||
|
|
if (state && state.container) {
|
||
|
|
// When coming forward from a separate history session, will get an
|
||
|
|
// initial pop with a state we are already at. Skip reloading the current
|
||
|
|
// page.
|
||
|
|
if (initialPop && initialURL == state.url) return
|
||
|
|
|
||
|
|
if (previousState) {
|
||
|
|
// If popping back to the same state, just skip.
|
||
|
|
// Could be clicking back from hashchange rather than a pushState.
|
||
|
|
if (previousState.id === state.id) return
|
||
|
|
|
||
|
|
// Since state IDs always increase, we can deduce the navigation direction
|
||
|
|
direction = previousState.id < state.id ? 'forward' : 'back'
|
||
|
|
}
|
||
|
|
|
||
|
|
var cache = cacheMapping[state.id] || []
|
||
|
|
var containerSelector = cache[0] || state.container
|
||
|
|
var container = $(containerSelector), contents = cache[1]
|
||
|
|
|
||
|
|
if (container.length) {
|
||
|
|
if (previousState) {
|
||
|
|
// Cache current container before replacement and inform the
|
||
|
|
// cache which direction the history shifted.
|
||
|
|
cachePop(direction, previousState.id, [containerSelector, cloneContents(container)])
|
||
|
|
}
|
||
|
|
|
||
|
|
var popstateEvent = $.Event('pjax:popstate', {
|
||
|
|
state: state,
|
||
|
|
direction: direction
|
||
|
|
})
|
||
|
|
container.trigger(popstateEvent)
|
||
|
|
|
||
|
|
var options = {
|
||
|
|
id: state.id,
|
||
|
|
url: state.url,
|
||
|
|
container: containerSelector,
|
||
|
|
push: false,
|
||
|
|
fragment: state.fragment,
|
||
|
|
timeout: state.timeout,
|
||
|
|
scrollTo: false
|
||
|
|
}
|
||
|
|
|
||
|
|
if (contents) {
|
||
|
|
container.trigger('pjax:start', [null, options])
|
||
|
|
|
||
|
|
pjax.state = state
|
||
|
|
if (state.title) document.title = state.title
|
||
|
|
var beforeReplaceEvent = $.Event('pjax:beforeReplace', {
|
||
|
|
state: state,
|
||
|
|
previousState: previousState
|
||
|
|
})
|
||
|
|
container.trigger(beforeReplaceEvent, [contents, options])
|
||
|
|
container.html(contents)
|
||
|
|
|
||
|
|
container.trigger('pjax:end', [null, options])
|
||
|
|
} else {
|
||
|
|
pjax(options)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Force reflow/relayout before the browser tries to restore the
|
||
|
|
// scroll position.
|
||
|
|
container[0].offsetHeight // eslint-disable-line no-unused-expressions
|
||
|
|
} else {
|
||
|
|
locationReplace(location.href)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
initialPop = false
|
||
|
|
}
|
||
|
|
|
||
|
|
// Fallback version of main pjax function for browsers that don't
|
||
|
|
// support pushState.
|
||
|
|
//
|
||
|
|
// Returns nothing since it retriggers a hard form submission.
|
||
|
|
function fallbackPjax(options) {
|
||
|
|
var url = $.isFunction(options.url) ? options.url() : options.url,
|
||
|
|
method = options.type ? options.type.toUpperCase() : 'GET'
|
||
|
|
|
||
|
|
var form = $('<form>', {
|
||
|
|
method: method === 'GET' ? 'GET' : 'POST',
|
||
|
|
action: url,
|
||
|
|
style: 'display:none'
|
||
|
|
})
|
||
|
|
|
||
|
|
if (method !== 'GET' && method !== 'POST') {
|
||
|
|
form.append($('<input>', {
|
||
|
|
type: 'hidden',
|
||
|
|
name: '_method',
|
||
|
|
value: method.toLowerCase()
|
||
|
|
}))
|
||
|
|
}
|
||
|
|
|
||
|
|
var data = options.data
|
||
|
|
if (typeof data === 'string') {
|
||
|
|
$.each(data.split('&'), function(index, value) {
|
||
|
|
var pair = value.split('=')
|
||
|
|
form.append($('<input>', {type: 'hidden', name: pair[0], value: pair[1]}))
|
||
|
|
})
|
||
|
|
} else if ($.isArray(data)) {
|
||
|
|
$.each(data, function(index, value) {
|
||
|
|
form.append($('<input>', {type: 'hidden', name: value.name, value: value.value}))
|
||
|
|
})
|
||
|
|
} else if (typeof data === 'object') {
|
||
|
|
var key
|
||
|
|
for (key in data)
|
||
|
|
form.append($('<input>', {type: 'hidden', name: key, value: data[key]}))
|
||
|
|
}
|
||
|
|
|
||
|
|
$(document.body).append(form)
|
||
|
|
form.submit()
|
||
|
|
}
|
||
|
|
|
||
|
|
// Internal: Abort an XmlHttpRequest if it hasn't been completed,
|
||
|
|
// also removing its event handlers.
|
||
|
|
function abortXHR(xhr) {
|
||
|
|
if ( xhr && xhr.readyState < 4) {
|
||
|
|
xhr.onreadystatechange = $.noop
|
||
|
|
xhr.abort()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Internal: Generate unique id for state object.
|
||
|
|
//
|
||
|
|
// Use a timestamp instead of a counter since ids should still be
|
||
|
|
// unique across page loads.
|
||
|
|
//
|
||
|
|
// Returns Number.
|
||
|
|
function uniqueId() {
|
||
|
|
return (new Date).getTime()
|
||
|
|
}
|
||
|
|
|
||
|
|
function cloneContents(container) {
|
||
|
|
var cloned = container.clone()
|
||
|
|
// Unmark script tags as already being eval'd so they can get executed again
|
||
|
|
// when restored from cache. HAXX: Uses jQuery internal method.
|
||
|
|
cloned.find('script').each(function(){
|
||
|
|
if (!this.src) $._data(this, 'globalEval', false)
|
||
|
|
})
|
||
|
|
return cloned.contents()
|
||
|
|
}
|
||
|
|
|
||
|
|
// Internal: Strip internal query params from parsed URL.
|
||
|
|
//
|
||
|
|
// Returns sanitized url.href String.
|
||
|
|
function stripInternalParams(url) {
|
||
|
|
url.search = url.search.replace(/([?&])(_pjax|_)=[^&]*/g, '').replace(/^&/, '')
|
||
|
|
return url.href.replace(/\?($|#)/, '$1')
|
||
|
|
}
|
||
|
|
|
||
|
|
// Internal: Parse URL components and returns a Locationish object.
|
||
|
|
//
|
||
|
|
// url - String URL
|
||
|
|
//
|
||
|
|
// Returns HTMLAnchorElement that acts like Location.
|
||
|
|
function parseURL(url) {
|
||
|
|
var a = document.createElement('a')
|
||
|
|
a.href = url
|
||
|
|
return a
|
||
|
|
}
|
||
|
|
|
||
|
|
// Internal: Return the `href` component of given URL object with the hash
|
||
|
|
// portion removed.
|
||
|
|
//
|
||
|
|
// location - Location or HTMLAnchorElement
|
||
|
|
//
|
||
|
|
// Returns String
|
||
|
|
function stripHash(location) {
|
||
|
|
return location.href.replace(/#.*/, '')
|
||
|
|
}
|
||
|
|
|
||
|
|
// Internal: Build options Object for arguments.
|
||
|
|
//
|
||
|
|
// For convenience the first parameter can be either the container or
|
||
|
|
// the options object.
|
||
|
|
//
|
||
|
|
// Examples
|
||
|
|
//
|
||
|
|
// optionsFor('#container')
|
||
|
|
// // => {container: '#container'}
|
||
|
|
//
|
||
|
|
// optionsFor('#container', {push: true})
|
||
|
|
// // => {container: '#container', push: true}
|
||
|
|
//
|
||
|
|
// optionsFor({container: '#container', push: true})
|
||
|
|
// // => {container: '#container', push: true}
|
||
|
|
//
|
||
|
|
// Returns options Object.
|
||
|
|
function optionsFor(container, options) {
|
||
|
|
if (container && options) {
|
||
|
|
options = $.extend({}, options)
|
||
|
|
options.container = container
|
||
|
|
return options
|
||
|
|
} else if ($.isPlainObject(container)) {
|
||
|
|
return container
|
||
|
|
} else {
|
||
|
|
return {container: container}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Internal: Filter and find all elements matching the selector.
|
||
|
|
//
|
||
|
|
// Where $.fn.find only matches descendants, findAll will test all the
|
||
|
|
// top level elements in the jQuery object as well.
|
||
|
|
//
|
||
|
|
// elems - jQuery object of Elements
|
||
|
|
// selector - String selector to match
|
||
|
|
//
|
||
|
|
// Returns a jQuery object.
|
||
|
|
function findAll(elems, selector) {
|
||
|
|
return elems.filter(selector).add(elems.find(selector))
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseHTML(html) {
|
||
|
|
return $.parseHTML(html, document, true)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Internal: Extracts container and metadata from response.
|
||
|
|
//
|
||
|
|
// 1. Extracts X-PJAX-URL header if set
|
||
|
|
// 2. Extracts inline <title> tags
|
||
|
|
// 3. Builds response Element and extracts fragment if set
|
||
|
|
//
|
||
|
|
// data - String response data
|
||
|
|
// xhr - XHR response
|
||
|
|
// options - pjax options Object
|
||
|
|
//
|
||
|
|
// Returns an Object with url, title, and contents keys.
|
||
|
|
function extractContainer(data, xhr, options) {
|
||
|
|
var obj = {}, fullDocument = /<html/i.test(data)
|
||
|
|
|
||
|
|
// Prefer X-PJAX-URL header if it was set, otherwise fallback to
|
||
|
|
// using the original requested url.
|
||
|
|
var serverUrl = xhr.getResponseHeader('X-PJAX-URL')
|
||
|
|
obj.url = serverUrl ? stripInternalParams(parseURL(serverUrl)) : options.requestUrl
|
||
|
|
|
||
|
|
var $head, $body
|
||
|
|
// Attempt to parse response html into elements
|
||
|
|
if (fullDocument) {
|
||
|
|
$body = $(parseHTML(data.match(/<body[^>]*>([\s\S.]*)<\/body>/i)[0]))
|
||
|
|
var head = data.match(/<head[^>]*>([\s\S.]*)<\/head>/i)
|
||
|
|
$head = head != null ? $(parseHTML(head[0])) : $body
|
||
|
|
} else {
|
||
|
|
$head = $body = $(parseHTML(data))
|
||
|
|
}
|
||
|
|
|
||
|
|
// If response data is empty, return fast
|
||
|
|
if ($body.length === 0)
|
||
|
|
return obj
|
||
|
|
|
||
|
|
// If there's a <title> tag in the header, use it as
|
||
|
|
// the page's title.
|
||
|
|
obj.title = findAll($head, 'title').last().text()
|
||
|
|
|
||
|
|
if (options.fragment) {
|
||
|
|
var $fragment = $body
|
||
|
|
// If they specified a fragment, look for it in the response
|
||
|
|
// and pull it out.
|
||
|
|
if (options.fragment !== 'body') {
|
||
|
|
$fragment = findAll($fragment, options.fragment).first()
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($fragment.length) {
|
||
|
|
obj.contents = options.fragment === 'body' ? $fragment : $fragment.contents()
|
||
|
|
|
||
|
|
// If there's no title, look for data-title and title attributes
|
||
|
|
// on the fragment
|
||
|
|
if (!obj.title)
|
||
|
|
obj.title = $fragment.attr('title') || $fragment.data('title')
|
||
|
|
}
|
||
|
|
|
||
|
|
} else if (!fullDocument) {
|
||
|
|
obj.contents = $body
|
||
|
|
}
|
||
|
|
|
||
|
|
// Clean up any <title> tags
|
||
|
|
if (obj.contents) {
|
||
|
|
// Remove any parent title elements
|
||
|
|
obj.contents = obj.contents.not(function() { return $(this).is('title') })
|
||
|
|
|
||
|
|
// Then scrub any titles from their descendants
|
||
|
|
obj.contents.find('title').remove()
|
||
|
|
|
||
|
|
// Gather all script[src] elements
|
||
|
|
obj.scripts = findAll(obj.contents, 'script[src]').remove()
|
||
|
|
obj.contents = obj.contents.not(obj.scripts)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Trim any whitespace off the title
|
||
|
|
if (obj.title) obj.title = $.trim(obj.title)
|
||
|
|
|
||
|
|
return obj
|
||
|
|
}
|
||
|
|
|
||
|
|
// Load an execute scripts using standard script request.
|
||
|
|
//
|
||
|
|
// Avoids jQuery's traditional $.getScript which does a XHR request and
|
||
|
|
// globalEval.
|
||
|
|
//
|
||
|
|
// scripts - jQuery object of script Elements
|
||
|
|
//
|
||
|
|
// Returns nothing.
|
||
|
|
function executeScriptTags(scripts) {
|
||
|
|
if (!scripts) return
|
||
|
|
|
||
|
|
var existingScripts = $('script[src]')
|
||
|
|
|
||
|
|
scripts.each(function() {
|
||
|
|
var src = this.src
|
||
|
|
var matchedScripts = existingScripts.filter(function() {
|
||
|
|
return this.src === src
|
||
|
|
})
|
||
|
|
if (matchedScripts.length) return
|
||
|
|
|
||
|
|
var script = document.createElement('script')
|
||
|
|
var type = $(this).attr('type')
|
||
|
|
if (type) script.type = type
|
||
|
|
script.src = $(this).attr('src')
|
||
|
|
document.head.appendChild(script)
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
// Internal: History DOM caching class.
|
||
|
|
var cacheMapping = {}
|
||
|
|
var cacheForwardStack = []
|
||
|
|
var cacheBackStack = []
|
||
|
|
|
||
|
|
// Push previous state id and container contents into the history
|
||
|
|
// cache. Should be called in conjunction with `pushState` to save the
|
||
|
|
// previous container contents.
|
||
|
|
//
|
||
|
|
// id - State ID Number
|
||
|
|
// value - DOM Element to cache
|
||
|
|
//
|
||
|
|
// Returns nothing.
|
||
|
|
function cachePush(id, value) {
|
||
|
|
cacheMapping[id] = value
|
||
|
|
cacheBackStack.push(id)
|
||
|
|
|
||
|
|
// Remove all entries in forward history stack after pushing a new page.
|
||
|
|
trimCacheStack(cacheForwardStack, 0)
|
||
|
|
|
||
|
|
// Trim back history stack to max cache length.
|
||
|
|
trimCacheStack(cacheBackStack, pjax.defaults.maxCacheLength)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Shifts cache from directional history cache. Should be
|
||
|
|
// called on `popstate` with the previous state id and container
|
||
|
|
// contents.
|
||
|
|
//
|
||
|
|
// direction - "forward" or "back" String
|
||
|
|
// id - State ID Number
|
||
|
|
// value - DOM Element to cache
|
||
|
|
//
|
||
|
|
// Returns nothing.
|
||
|
|
function cachePop(direction, id, value) {
|
||
|
|
var pushStack, popStack
|
||
|
|
cacheMapping[id] = value
|
||
|
|
|
||
|
|
if (direction === 'forward') {
|
||
|
|
pushStack = cacheBackStack
|
||
|
|
popStack = cacheForwardStack
|
||
|
|
} else {
|
||
|
|
pushStack = cacheForwardStack
|
||
|
|
popStack = cacheBackStack
|
||
|
|
}
|
||
|
|
|
||
|
|
pushStack.push(id)
|
||
|
|
id = popStack.pop()
|
||
|
|
if (id) delete cacheMapping[id]
|
||
|
|
|
||
|
|
// Trim whichever stack we just pushed to to max cache length.
|
||
|
|
trimCacheStack(pushStack, pjax.defaults.maxCacheLength)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Trim a cache stack (either cacheBackStack or cacheForwardStack) to be no
|
||
|
|
// longer than the specified length, deleting cached DOM elements as necessary.
|
||
|
|
//
|
||
|
|
// stack - Array of state IDs
|
||
|
|
// length - Maximum length to trim to
|
||
|
|
//
|
||
|
|
// Returns nothing.
|
||
|
|
function trimCacheStack(stack, length) {
|
||
|
|
while (stack.length > length)
|
||
|
|
delete cacheMapping[stack.shift()]
|
||
|
|
}
|
||
|
|
|
||
|
|
// Public: Find version identifier for the initial page load.
|
||
|
|
//
|
||
|
|
// Returns String version or undefined.
|
||
|
|
function findVersion() {
|
||
|
|
return $('meta').filter(function() {
|
||
|
|
var name = $(this).attr('http-equiv')
|
||
|
|
return name && name.toUpperCase() === 'X-PJAX-VERSION'
|
||
|
|
}).attr('content')
|
||
|
|
}
|
||
|
|
|
||
|
|
// Install pjax functions on $.pjax to enable pushState behavior.
|
||
|
|
//
|
||
|
|
// Does nothing if already enabled.
|
||
|
|
//
|
||
|
|
// Examples
|
||
|
|
//
|
||
|
|
// $.pjax.enable()
|
||
|
|
//
|
||
|
|
// Returns nothing.
|
||
|
|
function enable() {
|
||
|
|
$.fn.pjax = fnPjax
|
||
|
|
$.pjax = pjax
|
||
|
|
$.pjax.enable = $.noop
|
||
|
|
$.pjax.disable = disable
|
||
|
|
$.pjax.click = handleClick
|
||
|
|
$.pjax.submit = handleSubmit
|
||
|
|
$.pjax.reload = pjaxReload
|
||
|
|
$.pjax.defaults = {
|
||
|
|
timeout: 650,
|
||
|
|
push: true,
|
||
|
|
replace: false,
|
||
|
|
type: 'GET',
|
||
|
|
dataType: 'html',
|
||
|
|
scrollTo: 0,
|
||
|
|
maxCacheLength: 20,
|
||
|
|
version: findVersion
|
||
|
|
}
|
||
|
|
$(window).on('popstate.pjax', onPjaxPopstate)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Disable pushState behavior.
|
||
|
|
//
|
||
|
|
// This is the case when a browser doesn't support pushState. It is
|
||
|
|
// sometimes useful to disable pushState for debugging on a modern
|
||
|
|
// browser.
|
||
|
|
//
|
||
|
|
// Examples
|
||
|
|
//
|
||
|
|
// $.pjax.disable()
|
||
|
|
//
|
||
|
|
// Returns nothing.
|
||
|
|
function disable() {
|
||
|
|
$.fn.pjax = function() { return this }
|
||
|
|
$.pjax = fallbackPjax
|
||
|
|
$.pjax.enable = enable
|
||
|
|
$.pjax.disable = $.noop
|
||
|
|
$.pjax.click = $.noop
|
||
|
|
$.pjax.submit = $.noop
|
||
|
|
$.pjax.reload = function() { window.location.reload() }
|
||
|
|
|
||
|
|
$(window).off('popstate.pjax', onPjaxPopstate)
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// Add the state property to jQuery's event object so we can use it in
|
||
|
|
// $(window).bind('popstate')
|
||
|
|
if ($.event.props && $.inArray('state', $.event.props) < 0) {
|
||
|
|
$.event.props.push('state')
|
||
|
|
} else if (!('state' in $.Event.prototype)) {
|
||
|
|
$.event.addProp('state')
|
||
|
|
}
|
||
|
|
|
||
|
|
// Is pjax supported by this browser?
|
||
|
|
$.support.pjax =
|
||
|
|
window.history && window.history.pushState && window.history.replaceState &&
|
||
|
|
// pushState isn't reliable on iOS until 5.
|
||
|
|
!navigator.userAgent.match(/((iPod|iPhone|iPad).+\bOS\s+[1-4]\D|WebApps\/.+CFNetwork)/)
|
||
|
|
|
||
|
|
if ($.support.pjax) {
|
||
|
|
enable()
|
||
|
|
} else {
|
||
|
|
disable()
|
||
|
|
}
|
||
|
|
|
||
|
|
})(jQuery)
|