1 /* ----------------------------------
3 * Licensed under The MIT License
4 * inspired by chris's jquery.pjax.js
5 * http://opensource.org/licenses/MIT
6 * ---------------------------------- */
10 var noop = function () {};
17 var maxCacheLength = 20;
18 var cacheMapping = sessionStorage;
21 'slide-in' : 'slide-out',
22 'slide-out' : 'slide-in',
27 bartitle : '.bar-title',
28 barfooter : '.bar-footer',
29 barheadersecondary : '.bar-header-secondary'
32 var cacheReplace = function (data, updates) {
34 if (updates) data = getCached(data.id);
35 cacheMapping[data.id] = JSON.stringify(data);
36 window.history.replaceState(data.id, data.title, data.url);
37 domCache[data.id] = document.body.cloneNode(true);
40 var cachePush = function () {
43 var cacheForwardStack = JSON.parse(cacheMapping.cacheForwardStack || '[]');
44 var cacheBackStack = JSON.parse(cacheMapping.cacheBackStack || '[]');
46 cacheBackStack.push(id);
48 while (cacheForwardStack.length) delete cacheMapping[cacheForwardStack.shift()];
49 while (cacheBackStack.length > maxCacheLength) delete cacheMapping[cacheBackStack.shift()];
51 window.history.pushState(null, '', cacheMapping[PUSH.id].url);
53 cacheMapping.cacheForwardStack = JSON.stringify(cacheForwardStack);
54 cacheMapping.cacheBackStack = JSON.stringify(cacheBackStack);
57 var cachePop = function (id, direction) {
58 var forward = direction == 'forward';
59 var cacheForwardStack = JSON.parse(cacheMapping.cacheForwardStack || '[]');
60 var cacheBackStack = JSON.parse(cacheMapping.cacheBackStack || '[]');
61 var pushStack = forward ? cacheBackStack : cacheForwardStack;
62 var popStack = forward ? cacheForwardStack : cacheBackStack;
64 if (PUSH.id) pushStack.push(PUSH.id);
67 cacheMapping.cacheForwardStack = JSON.stringify(cacheForwardStack);
68 cacheMapping.cacheBackStack = JSON.stringify(cacheBackStack);
71 var getCached = function (id) {
72 return JSON.parse(cacheMapping[id] || null) || {};
75 var getTarget = function (e) {
76 var target = findTarget(e.target);
84 || location.protocol !== target.protocol
85 || location.host !== target.host
86 || !target.hash && /#/.test(target.href)
87 || target.hash && target.href.replace(target.hash, '') === location.href.replace(location.hash, '')
88 || target.getAttribute('data-ignore') == 'push'
95 // Main event handlers (touchend, popstate)
96 // ==========================================
98 var touchend = function (e) {
99 var target = getTarget(e);
108 timeout : target.getAttribute('data-timeout'),
109 transition : target.getAttribute('data-transition')
113 var popstate = function (e) {
121 var transitionFromObj;
124 if (!id || !cacheMapping[id]) return;
126 direction = PUSH.id < id ? 'forward' : 'back';
128 cachePop(id, direction);
130 activeObj = getCached(id);
131 activeDom = domCache[id];
133 if (activeObj.title) document.title = activeObj.title;
135 if (direction == 'back') {
136 transitionFrom = JSON.parse(direction == 'back' ? cacheMapping.cacheForwardStack : cacheMapping.cacheBackStack);
137 transitionFromObj = getCached(transitionFrom[transitionFrom.length - 1]);
139 transitionFromObj = activeObj;
142 if (direction == 'back' && !transitionFromObj.id) return PUSH.id = id;
144 transition = direction == 'back' ? transitionMap[transitionFromObj.transition] : transitionFromObj.transition;
150 title : activeObj.title,
151 timeout : activeObj.timeout,
152 transition : transition,
157 if (transitionFromObj.transition) {
158 activeObj = extendWithDom(activeObj, '.content', activeDom.cloneNode(true));
160 barElement = document.querySelector(bars[key])
161 if (activeObj[key]) swapContent(activeObj[key], barElement);
162 else if (barElement) barElement.parentNode.removeChild(barElement);
167 (activeObj.contents || activeDom).cloneNode(true),
168 document.querySelector('.content'),
174 document.body.offsetHeight; // force reflow to prevent scroll
178 // Core PUSH functionality
179 // =======================
181 var PUSH = function (options) {
186 options.container = options.container || options.transition ? document.querySelector('.content') : document.body;
189 options[key] = options[key] || document.querySelector(bars[key]);
192 if (xhr && xhr.readyState < 4) {
193 xhr.onreadystatechange = noop;
197 xhr = new XMLHttpRequest();
198 xhr.open('GET', options.url, true);
199 xhr.setRequestHeader('X-PUSH', 'true');
201 xhr.onreadystatechange = function () {
202 if (options._timeout) clearTimeout(options._timeout);
203 if (xhr.readyState == 4) xhr.status == 200 ? success(xhr, options) : failure(options.url);
209 url : window.location.href,
210 title : document.title,
211 timeout : options.timeout,
216 if (options.timeout) {
217 options._timeout = setTimeout(function () { xhr.abort('timeout'); }, options.timeout);
222 if (xhr.readyState && !options.ignorePush) cachePush();
229 var success = function (xhr, options) {
232 var data = parseXHR(xhr, options);
234 if (!data.contents) return locationReplace(options.url);
236 if (data.title) document.title = data.title;
238 if (options.transition) {
240 barElement = document.querySelector(bars[key])
241 if (data[key]) swapContent(data[key], barElement);
242 else if (barElement) barElement.parentNode.removeChild(barElement);
246 swapContent(data.contents, options.container, options.transition, function () {
248 id : options.id || +new Date,
251 timeout : options.timeout,
252 transition : options.transition
254 triggerStateChange();
257 if (!options.ignorePush && window._gaq) _gaq.push(['_trackPageview']) // google analytics
258 if (!options.hash) return;
261 var failure = function (url) {
262 throw new Error('Could not get: ' + url)
269 var swapContent = function (swap, container, transition, complete) {
271 var containerDirection;
275 if (container) container.innerHTML = swap.innerHTML;
276 else if (swap.classList.contains('content')) document.body.appendChild(swap);
277 else document.body.insertBefore(swap, document.querySelector('.content'));
279 enter = /in$/.test(transition);
281 if (transition == 'fade') {
282 container.classList.add('in');
283 container.classList.add('fade');
284 swap.classList.add('fade');
287 if (/slide/.test(transition)) {
288 swap.classList.add(enter ? 'right' : 'left');
289 swap.classList.add('slide');
290 container.classList.add('slide');
293 container.parentNode.insertBefore(swap, container);
296 if (!transition) complete && complete();
298 if (transition == 'fade') {
299 container.offsetWidth; // force reflow
300 container.classList.remove('in');
301 container.addEventListener('webkitTransitionEnd', fadeContainerEnd);
303 function fadeContainerEnd() {
304 container.removeEventListener('webkitTransitionEnd', fadeContainerEnd);
305 swap.classList.add('in');
306 swap.addEventListener('webkitTransitionEnd', fadeSwapEnd);
308 function fadeSwapEnd () {
309 swap.removeEventListener('webkitTransitionEnd', fadeSwapEnd);
310 container.parentNode.removeChild(container);
311 swap.classList.remove('fade');
312 swap.classList.remove('in');
313 complete && complete();
317 if (/slide/.test(transition)) {
318 container.offsetWidth; // force reflow
319 swapDirection = enter ? 'right' : 'left'
320 containerDirection = enter ? 'left' : 'right'
321 container.classList.add(containerDirection);
322 swap.classList.remove(swapDirection);
323 swap.addEventListener('webkitTransitionEnd', slideEnd);
325 function slideEnd() {
326 swap.removeEventListener('webkitTransitionEnd', slideEnd);
327 swap.classList.remove('slide');
328 swap.classList.remove(swapDirection);
329 container.parentNode.removeChild(container);
330 complete && complete();
335 var triggerStateChange = function () {
336 var e = new CustomEvent('push', {
337 detail: { state: getCached(PUSH.id) },
342 window.dispatchEvent(e);
345 var findTarget = function (target) {
346 var i, toggles = document.querySelectorAll('a');
347 for (; target && target !== document; target = target.parentNode) {
348 for (i = toggles.length; i--;) { if (toggles[i] === target) return target; }
352 var locationReplace = function (url) {
353 window.history.replaceState(null, '', '#');
354 window.location.replace(url);
357 var parseURL = function (url) {
358 var a = document.createElement('a'); a.href = url; return a;
361 var extendWithDom = function (obj, fragment, dom) {
365 for (i in obj) result[i] = obj[i];
367 Object.keys(bars).forEach(function (key) {
368 var el = dom.querySelector(bars[key]);
369 if (el) el.parentNode.removeChild(el);
373 result.contents = dom.querySelector(fragment);
378 var parseXHR = function (xhr, options) {
382 var responseText = xhr.responseText;
384 data.url = options.url;
386 if (!responseText) return data;
388 if (/<html/i.test(responseText)) {
389 head = document.createElement('div');
390 body = document.createElement('div');
391 head.innerHTML = responseText.match(/<head[^>]*>([\s\S.]*)<\/head>/i)[0]
392 body.innerHTML = responseText.match(/<body[^>]*>([\s\S.]*)<\/body>/i)[0]
394 head = body = document.createElement('div');
395 head.innerHTML = responseText;
398 data.title = head.querySelector('title');
399 data.title = data.title && data.title.innerText.trim();
401 if (options.transition) data = extendWithDom(data, '.content', body);
402 else data.contents = body;
408 // Attach PUSH event handlers
409 // ==========================
411 window.addEventListener('touchstart', function () { isScrolling = false; });
412 window.addEventListener('touchmove', function () { isScrolling = true; })
413 window.addEventListener('touchend', touchend);
414 window.addEventListener('click', function (e) { if (getTarget(e)) e.preventDefault(); });
415 window.addEventListener('popstate', popstate);