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/assets/js/jquery.pjax.js:
--------------------------------------------------------------------------------
1 | /*!
2 | * Copyright 2012, Chris Wanstrath
3 | * Released under the MIT License
4 | * https://github.com/defunkt/jquery-pjax
5 | */
6 |
7 | (function($){
8 |
9 | // When called on a container with a selector, fetches the href with
10 | // ajax into the container or with the data-pjax attribute on the link
11 | // itself.
12 | //
13 | // Tries to make sure the back button and ctrl+click work the way
14 | // you'd expect.
15 | //
16 | // Exported as $.fn.pjax
17 | //
18 | // Accepts a jQuery ajax options object that may include these
19 | // pjax specific options:
20 | //
21 | //
22 | // container - Where to stick the response body. Usually a String selector.
23 | // $(container).html(xhr.responseBody)
24 | // (default: current jquery context)
25 | // push - Whether to pushState the URL. Defaults to true (of course).
26 | // replace - Want to use replaceState instead? That's cool.
27 | //
28 | // For convenience the second parameter can be either the container or
29 | // the options object.
30 | //
31 | // Returns the jQuery object
32 | function fnPjax(selector, container, options) {
33 | var context = this
34 | return this.on('click.pjax', selector, function(event) {
35 | var opts = $.extend({}, optionsFor(container, options))
36 | if (!opts.container)
37 | opts.container = $(this).attr('data-pjax') || context
38 | handleClick(event, opts)
39 | })
40 | }
41 |
42 | // Public: pjax on click handler
43 | //
44 | // Exported as $.pjax.click.
45 | //
46 | // event - "click" jQuery.Event
47 | // options - pjax options
48 | //
49 | // Examples
50 | //
51 | // $(document).on('click', 'a', $.pjax.click)
52 | // // is the same as
53 | // $(document).pjax('a')
54 | //
55 | // $(document).on('click', 'a', function(event) {
56 | // var container = $(this).closest('[data-pjax-container]')
57 | // $.pjax.click(event, container)
58 | // })
59 | //
60 | // Returns nothing.
61 | function handleClick(event, container, options) {
62 | options = optionsFor(container, options)
63 |
64 | var link = event.currentTarget
65 |
66 | if (link.tagName.toUpperCase() !== 'A')
67 | throw "$.fn.pjax or $.pjax.click requires an anchor element"
68 |
69 | // Middle click, cmd click, and ctrl click should open
70 | // links in a new tab as normal.
71 | if ( event.which > 1 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey )
72 | return
73 |
74 | // Ignore cross origin links
75 | if ( location.protocol !== link.protocol || location.hostname !== link.hostname )
76 | return
77 |
78 | // Ignore case when a hash is being tacked on the current URL
79 | if ( link.href.indexOf('#') > -1 && stripHash(link) == stripHash(location) )
80 | return
81 |
82 | // Ignore event with default prevented
83 | if (event.isDefaultPrevented())
84 | return
85 |
86 | var defaults = {
87 | url: link.href,
88 | container: $(link).attr('data-pjax'),
89 | target: link
90 | }
91 |
92 | var opts = $.extend({}, defaults, options)
93 | var clickEvent = $.Event('pjax:click')
94 | $(link).trigger(clickEvent, [opts])
95 |
96 | if (!clickEvent.isDefaultPrevented()) {
97 | pjax(opts)
98 | event.preventDefault()
99 | $(link).trigger('pjax:clicked', [opts])
100 | }
101 | }
102 |
103 | // Public: pjax on form submit handler
104 | //
105 | // Exported as $.pjax.submit
106 | //
107 | // event - "click" jQuery.Event
108 | // options - pjax options
109 | //
110 | // Examples
111 | //
112 | // $(document).on('submit', 'form', function(event) {
113 | // var container = $(this).closest('[data-pjax-container]')
114 | // $.pjax.submit(event, container)
115 | // })
116 | //
117 | // Returns nothing.
118 | function handleSubmit(event, container, options) {
119 | options = optionsFor(container, options)
120 |
121 | var form = event.currentTarget
122 | var $form = $(form)
123 |
124 | if (form.tagName.toUpperCase() !== 'FORM')
125 | throw "$.pjax.submit requires a form element"
126 |
127 | var defaults = {
128 | type: ($form.attr('method') || 'GET').toUpperCase(),
129 | url: $form.attr('action'),
130 | container: $form.attr('data-pjax'),
131 | target: form
132 | }
133 |
134 | if (defaults.type !== 'GET' && window.FormData !== undefined) {
135 | defaults.data = new FormData(form);
136 | defaults.processData = false;
137 | defaults.contentType = false;
138 | } else {
139 | // Can't handle file uploads, exit
140 | if ($(form).find(':file').length) {
141 | return;
142 | }
143 |
144 | // Fallback to manually serializing the fields
145 | defaults.data = $(form).serializeArray();
146 | }
147 |
148 | pjax($.extend({}, defaults, options))
149 |
150 | event.preventDefault()
151 | }
152 |
153 | // Loads a URL with ajax, puts the response body inside a container,
154 | // then pushState()'s the loaded URL.
155 | //
156 | // Works just like $.ajax in that it accepts a jQuery ajax
157 | // settings object (with keys like url, type, data, etc).
158 | //
159 | // Accepts these extra keys:
160 | //
161 | // container - Where to stick the response body.
162 | // $(container).html(xhr.responseBody)
163 | // push - Whether to pushState the URL. Defaults to true (of course).
164 | // replace - Want to use replaceState instead? That's cool.
165 | //
166 | // Use it just like $.ajax:
167 | //
168 | // var xhr = $.pjax({ url: this.href, container: '#main' })
169 | // console.log( xhr.readyState )
170 | //
171 | // Returns whatever $.ajax returns.
172 | function pjax(options) {
173 | options = $.extend(true, {}, $.ajaxSettings, pjax.defaults, options)
174 |
175 | if ($.isFunction(options.url)) {
176 | options.url = options.url()
177 | }
178 |
179 | var target = options.target
180 |
181 | var hash = parseURL(options.url).hash
182 |
183 | var context = options.context = findContainerFor(options.container)
184 |
185 | // We want the browser to maintain two separate internal caches: one
186 | // for pjax'd partial page loads and one for normal page loads.
187 | // Without adding this secret parameter, some browsers will often
188 | // confuse the two.
189 | if (!options.data) options.data = {}
190 | if ($.isArray(options.data)) {
191 | options.data.push({name: '_pjax', value: context.selector})
192 | } else {
193 | options.data._pjax = context.selector
194 | }
195 |
196 | function fire(type, args, props) {
197 | if (!props) props = {}
198 | props.relatedTarget = target
199 | var event = $.Event(type, props)
200 | context.trigger(event, args)
201 | return !event.isDefaultPrevented()
202 | }
203 |
204 | var timeoutTimer
205 |
206 | options.beforeSend = function(xhr, settings) {
207 | // No timeout for non-GET requests
208 | // Its not safe to request the resource again with a fallback method.
209 | if (settings.type !== 'GET') {
210 | settings.timeout = 0
211 | }
212 |
213 | xhr.setRequestHeader('X-PJAX', 'true')
214 | xhr.setRequestHeader('X-PJAX-Container', context.selector)
215 |
216 | if (!fire('pjax:beforeSend', [xhr, settings]))
217 | return false
218 |
219 | if (settings.timeout > 0) {
220 | timeoutTimer = setTimeout(function() {
221 | if (fire('pjax:timeout', [xhr, options]))
222 | xhr.abort('timeout')
223 | }, settings.timeout)
224 |
225 | // Clear timeout setting so jquerys internal timeout isn't invoked
226 | settings.timeout = 0
227 | }
228 |
229 | var url = parseURL(settings.url)
230 | if (hash) url.hash = hash
231 | options.requestUrl = stripInternalParams(url)
232 | }
233 |
234 | options.complete = function(xhr, textStatus) {
235 | if (timeoutTimer)
236 | clearTimeout(timeoutTimer)
237 |
238 | fire('pjax:complete', [xhr, textStatus, options])
239 |
240 | fire('pjax:end', [xhr, options])
241 | }
242 |
243 | options.error = function(xhr, textStatus, errorThrown) {
244 | var container = extractContainer("", xhr, options)
245 |
246 | var allowed = fire('pjax:error', [xhr, textStatus, errorThrown, options])
247 | if (options.type == 'GET' && textStatus !== 'abort' && allowed) {
248 | locationReplace(container.url)
249 | }
250 | }
251 |
252 | options.success = function(data, status, xhr) {
253 | var previousState = pjax.state;
254 |
255 | // If $.pjax.defaults.version is a function, invoke it first.
256 | // Otherwise it can be a static string.
257 | var currentVersion = (typeof $.pjax.defaults.version === 'function') ?
258 | $.pjax.defaults.version() :
259 | $.pjax.defaults.version
260 |
261 | var latestVersion = xhr.getResponseHeader('X-PJAX-Version')
262 |
263 | var container = extractContainer(data, xhr, options)
264 |
265 | var url = parseURL(container.url)
266 | if (hash) {
267 | url.hash = hash
268 | container.url = url.href
269 | }
270 |
271 | // If there is a layout version mismatch, hard load the new url
272 | if (currentVersion && latestVersion && currentVersion !== latestVersion) {
273 | locationReplace(container.url)
274 | return
275 | }
276 |
277 | // If the new response is missing a body, hard load the page
278 | if (!container.contents) {
279 | locationReplace(container.url)
280 | return
281 | }
282 |
283 | pjax.state = {
284 | id: options.id || uniqueId(),
285 | url: container.url,
286 | title: container.title,
287 | container: context.selector,
288 | fragment: options.fragment,
289 | timeout: options.timeout
290 | }
291 |
292 | if (options.push || options.replace) {
293 | window.history.replaceState(pjax.state, container.title, container.url)
294 | }
295 |
296 | // Only blur the focus if the focused element is within the container.
297 | var blurFocus = $.contains(options.container, document.activeElement)
298 |
299 | // Clear out any focused controls before inserting new page contents.
300 | if (blurFocus) {
301 | try {
302 | document.activeElement.blur()
303 | } catch (e) { }
304 | }
305 |
306 | if (container.title) document.title = container.title
307 |
308 | fire('pjax:beforeReplace', [container.contents, options], {
309 | state: pjax.state,
310 | previousState: previousState
311 | })
312 | context.html(container.contents)
313 |
314 | // FF bug: Won't autofocus fields that are inserted via JS.
315 | // This behavior is incorrect. So if theres no current focus, autofocus
316 | // the last field.
317 | //
318 | // http://www.w3.org/html/wg/drafts/html/master/forms.html
319 | var autofocusEl = context.find('input[autofocus], textarea[autofocus]').last()[0]
320 | if (autofocusEl && document.activeElement !== autofocusEl) {
321 | autofocusEl.focus();
322 | }
323 |
324 | executeScriptTags(container.scripts)
325 |
326 | var scrollTo = options.scrollTo
327 |
328 | // Ensure browser scrolls to the element referenced by the URL anchor
329 | if (hash) {
330 | var name = decodeURIComponent(hash.slice(1))
331 | var target = document.getElementById(name) || document.getElementsByName(name)[0]
332 | if (target) scrollTo = $(target).offset().top
333 | }
334 |
335 | if (typeof scrollTo == 'number') $(window).scrollTop(scrollTo)
336 |
337 | fire('pjax:success', [data, status, xhr, options])
338 | }
339 |
340 |
341 | // Initialize pjax.state for the initial page load. Assume we're
342 | // using the container and options of the link we're loading for the
343 | // back button to the initial page. This ensures good back button
344 | // behavior.
345 | if (!pjax.state) {
346 | pjax.state = {
347 | id: uniqueId(),
348 | url: window.location.href,
349 | title: document.title,
350 | container: context.selector,
351 | fragment: options.fragment,
352 | timeout: options.timeout
353 | }
354 | window.history.replaceState(pjax.state, document.title)
355 | }
356 |
357 | // Cancel the current request if we're already pjaxing
358 | abortXHR(pjax.xhr)
359 |
360 | pjax.options = options
361 | var xhr = pjax.xhr = $.ajax(options)
362 |
363 | if (xhr.readyState > 0) {
364 | if (options.push && !options.replace) {
365 | // Cache current container element before replacing it
366 | cachePush(pjax.state.id, cloneContents(context))
367 |
368 | window.history.pushState(null, "", options.requestUrl)
369 | }
370 |
371 | fire('pjax:start', [xhr, options])
372 | fire('pjax:send', [xhr, options])
373 | }
374 |
375 | return pjax.xhr
376 | }
377 |
378 | // Public: Reload current page with pjax.
379 | //
380 | // Returns whatever $.pjax returns.
381 | function pjaxReload(container, options) {
382 | var defaults = {
383 | url: window.location.href,
384 | push: false,
385 | replace: true,
386 | scrollTo: false
387 | }
388 |
389 | return pjax($.extend(defaults, optionsFor(container, options)))
390 | }
391 |
392 | // Internal: Hard replace current state with url.
393 | //
394 | // Work for around WebKit
395 | // https://bugs.webkit.org/show_bug.cgi?id=93506
396 | //
397 | // Returns nothing.
398 | function locationReplace(url) {
399 | window.history.replaceState(null, "", pjax.state.url)
400 | window.location.replace(url)
401 | }
402 |
403 |
404 | var initialPop = true
405 | var initialURL = window.location.href
406 | var initialState = window.history.state
407 |
408 | // Initialize $.pjax.state if possible
409 | // Happens when reloading a page and coming forward from a different
410 | // session history.
411 | if (initialState && initialState.container) {
412 | pjax.state = initialState
413 | }
414 |
415 | // Non-webkit browsers don't fire an initial popstate event
416 | if ('state' in window.history) {
417 | initialPop = false
418 | }
419 |
420 | // popstate handler takes care of the back and forward buttons
421 | //
422 | // You probably shouldn't use pjax on pages with other pushState
423 | // stuff yet.
424 | function onPjaxPopstate(event) {
425 |
426 | // Hitting back or forward should override any pending PJAX request.
427 | if (!initialPop) {
428 | abortXHR(pjax.xhr)
429 | }
430 |
431 | var previousState = pjax.state
432 | var state = event.state
433 | var direction
434 |
435 | if (state && state.container) {
436 | // When coming forward from a separate history session, will get an
437 | // initial pop with a state we are already at. Skip reloading the current
438 | // page.
439 | if (initialPop && initialURL == state.url) return
440 |
441 | if (previousState) {
442 | // If popping back to the same state, just skip.
443 | // Could be clicking back from hashchange rather than a pushState.
444 | if (previousState.id === state.id) return
445 |
446 | // Since state IDs always increase, we can deduce the navigation direction
447 | direction = previousState.id < state.id ? 'forward' : 'back'
448 | }
449 |
450 | var cache = cacheMapping[state.id] || []
451 | var container = $(cache[0] || state.container), contents = cache[1]
452 |
453 | if (container.length) {
454 | if (previousState) {
455 | // Cache current container before replacement and inform the
456 | // cache which direction the history shifted.
457 | cachePop(direction, previousState.id, cloneContents(container))
458 | }
459 |
460 | var popstateEvent = $.Event('pjax:popstate', {
461 | state: state,
462 | direction: direction
463 | })
464 | container.trigger(popstateEvent)
465 |
466 | var options = {
467 | id: state.id,
468 | url: state.url,
469 | container: container,
470 | push: false,
471 | fragment: state.fragment,
472 | timeout: state.timeout,
473 | scrollTo: false
474 | }
475 |
476 | if (contents) {
477 | container.trigger('pjax:start', [null, options])
478 |
479 | pjax.state = state
480 | if (state.title) document.title = state.title
481 | var beforeReplaceEvent = $.Event('pjax:beforeReplace', {
482 | state: state,
483 | previousState: previousState
484 | })
485 | container.trigger(beforeReplaceEvent, [contents, options])
486 | container.html(contents)
487 |
488 | container.trigger('pjax:end', [null, options])
489 | } else {
490 | pjax(options)
491 | }
492 |
493 | // Force reflow/relayout before the browser tries to restore the
494 | // scroll position.
495 | container[0].offsetHeight
496 | } else {
497 | locationReplace(location.href)
498 | }
499 | }
500 | initialPop = false
501 | }
502 |
503 | // Fallback version of main pjax function for browsers that don't
504 | // support pushState.
505 | //
506 | // Returns nothing since it retriggers a hard form submission.
507 | function fallbackPjax(options) {
508 | var url = $.isFunction(options.url) ? options.url() : options.url,
509 | method = options.type ? options.type.toUpperCase() : 'GET'
510 |
511 | var form = $('