| 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496 |
2
1
1
1
1
1
1
1
1
1
1
1
| /**
* @private
* TODO document
*/
IonicModule.factory('$ionicViewSwitcher', [
'$timeout',
'$document',
'$q',
'$ionicClickBlock',
'$ionicConfig',
'$ionicNavBarDelegate',
function($timeout, $document, $q, $ionicClickBlock, $ionicConfig, $ionicNavBarDelegate) {
var TRANSITIONEND_EVENT = 'webkitTransitionEnd transitionend';
var DATA_NO_CACHE = '$noCache';
var DATA_DESTROY_ELE = '$destroyEle';
var DATA_ELE_IDENTIFIER = '$eleId';
var DATA_VIEW_ACCESSED = '$accessed';
var DATA_FALLBACK_TIMER = '$fallbackTimer';
var DATA_VIEW = '$viewData';
var NAV_VIEW_ATTR = 'nav-view';
var VIEW_STATUS_ACTIVE = 'active';
var VIEW_STATUS_CACHED = 'cached';
var VIEW_STATUS_STAGED = 'stage';
var transitionCounter = 0;
var nextTransition, nextDirection;
ionic.transition = ionic.transition || {};
ionic.transition.isActive = false;
var isActiveTimer;
var cachedAttr = ionic.DomUtil.cachedAttr;
var transitionPromises = [];
var defaultTimeout = 1100;
var ionicViewSwitcher = {
create: function(navViewCtrl, viewLocals, enteringView, leavingView, renderStart, renderEnd) {
// get a reference to an entering/leaving element if they exist
// loop through to see if the view is already in the navViewElement
var enteringEle, leavingEle;
var transitionId = ++transitionCounter;
var alreadyInDom;
var switcher = {
init: function(registerData, callback) {
ionicViewSwitcher.isTransitioning(true);
switcher.loadViewElements(registerData);
switcher.render(registerData, function() {
callback && callback();
});
},
loadViewElements: function(registerData) {
var x, l, viewEle;
var viewElements = navViewCtrl.getViewElements();
var enteringEleIdentifier = getViewElementIdentifier(viewLocals, enteringView);
var navViewActiveEleId = navViewCtrl.activeEleId();
for (x = 0, l = viewElements.length; x < l; x++) {
viewEle = viewElements.eq(x);
if (viewEle.data(DATA_ELE_IDENTIFIER) === enteringEleIdentifier) {
// we found an existing element in the DOM that should be entering the view
if (viewEle.data(DATA_NO_CACHE)) {
// the existing element should not be cached, don't use it
viewEle.data(DATA_ELE_IDENTIFIER, enteringEleIdentifier + ionic.Utils.nextUid());
viewEle.data(DATA_DESTROY_ELE, true);
} else {
enteringEle = viewEle;
}
} else if (isDefined(navViewActiveEleId) && viewEle.data(DATA_ELE_IDENTIFIER) === navViewActiveEleId) {
leavingEle = viewEle;
}
if (enteringEle && leavingEle) break;
}
alreadyInDom = !!enteringEle;
if (!alreadyInDom) {
// still no existing element to use
// create it using existing template/scope/locals
enteringEle = registerData.ele || ionicViewSwitcher.createViewEle(viewLocals);
// existing elements in the DOM are looked up by their state name and state id
enteringEle.data(DATA_ELE_IDENTIFIER, enteringEleIdentifier);
}
if (renderEnd) {
navViewCtrl.activeEleId(enteringEleIdentifier);
}
registerData.ele = null;
},
render: function(registerData, callback) {
if (alreadyInDom) {
// it was already found in the DOM, just reconnect the scope
ionic.Utils.reconnectScope(enteringEle.scope());
} else {
// the entering element is not already in the DOM
// set that the entering element should be "staged" and its
// styles of where this element will go before it hits the DOM
navViewAttr(enteringEle, VIEW_STATUS_STAGED);
var enteringData = getTransitionData(viewLocals, enteringEle, registerData.direction, enteringView);
var transitionFn = $ionicConfig.transitions.views[enteringData.transition] || $ionicConfig.transitions.views.none;
transitionFn(enteringEle, null, enteringData.direction, true).run(0);
enteringEle.data(DATA_VIEW, {
viewId: enteringData.viewId,
historyId: enteringData.historyId,
stateName: enteringData.stateName,
stateParams: enteringData.stateParams
});
// if the current state has cache:false
// or the element has cache-view="false" attribute
if (viewState(viewLocals).cache === false || viewState(viewLocals).cache === 'false' ||
enteringEle.attr('cache-view') == 'false' || $ionicConfig.views.maxCache() === 0) {
enteringEle.data(DATA_NO_CACHE, true);
}
// append the entering element to the DOM, create a new scope and run link
var viewScope = navViewCtrl.appendViewElement(enteringEle, viewLocals);
delete enteringData.direction;
delete enteringData.transition;
viewScope.$emit('$ionicView.loaded', enteringData);
}
// update that this view was just accessed
enteringEle.data(DATA_VIEW_ACCESSED, Date.now());
callback && callback();
},
transition: function(direction, enableBack, allowAnimate) {
var deferred;
var enteringData = getTransitionData(viewLocals, enteringEle, direction, enteringView);
var leavingData = extend(extend({}, enteringData), getViewData(leavingView));
enteringData.transitionId = leavingData.transitionId = transitionId;
enteringData.fromCache = !!alreadyInDom;
enteringData.enableBack = !!enableBack;
enteringData.renderStart = renderStart;
enteringData.renderEnd = renderEnd;
cachedAttr(enteringEle.parent(), 'nav-view-transition', enteringData.transition);
cachedAttr(enteringEle.parent(), 'nav-view-direction', enteringData.direction);
// cancel any previous transition complete fallbacks
$timeout.cancel(enteringEle.data(DATA_FALLBACK_TIMER));
// get the transition ready and see if it'll animate
var transitionFn = $ionicConfig.transitions.views[enteringData.transition] || $ionicConfig.transitions.views.none;
var viewTransition = transitionFn(enteringEle, leavingEle, enteringData.direction,
enteringData.shouldAnimate && allowAnimate && renderEnd);
if (viewTransition.shouldAnimate) {
// attach transitionend events (and fallback timer)
enteringEle.on(TRANSITIONEND_EVENT, completeOnTransitionEnd);
enteringEle.data(DATA_FALLBACK_TIMER, $timeout(transitionComplete, defaultTimeout));
$ionicClickBlock.show(defaultTimeout);
}
if (renderStart) {
// notify the views "before" the transition starts
switcher.emit('before', enteringData, leavingData);
// stage entering element, opacity 0, no transition duration
navViewAttr(enteringEle, VIEW_STATUS_STAGED);
// render the elements in the correct location for their starting point
viewTransition.run(0);
}
if (renderEnd) {
// create a promise so we can keep track of when all transitions finish
// only required if this transition should complete
deferred = $q.defer();
transitionPromises.push(deferred.promise);
}
if (renderStart && renderEnd) {
// CSS "auto" transitioned, not manually transitioned
// wait a frame so the styles apply before auto transitioning
$timeout(function() {
ionic.requestAnimationFrame(onReflow);
});
} else if (!renderEnd) {
// just the start of a manual transition
// but it will not render the end of the transition
navViewAttr(enteringEle, 'entering');
navViewAttr(leavingEle, 'leaving');
// return the transition run method so each step can be ran manually
return {
run: viewTransition.run,
cancel: function(shouldAnimate) {
if (shouldAnimate) {
enteringEle.on(TRANSITIONEND_EVENT, cancelOnTransitionEnd);
enteringEle.data(DATA_FALLBACK_TIMER, $timeout(cancelTransition, defaultTimeout));
$ionicClickBlock.show(defaultTimeout);
} else {
cancelTransition();
}
viewTransition.shouldAnimate = shouldAnimate;
viewTransition.run(0);
viewTransition = null;
}
};
} else if (renderEnd) {
// just the end of a manual transition
// happens after the manual transition has completed
// and a full history change has happened
onReflow();
}
function onReflow() {
// remove that we're staging the entering element so it can auto transition
navViewAttr(enteringEle, viewTransition.shouldAnimate ? 'entering' : VIEW_STATUS_ACTIVE);
navViewAttr(leavingEle, viewTransition.shouldAnimate ? 'leaving' : VIEW_STATUS_CACHED);
// start the auto transition and let the CSS take over
viewTransition.run(1);
// trigger auto transitions on the associated nav bars
$ionicNavBarDelegate._instances.forEach(function(instance) {
instance.triggerTransitionStart(transitionId);
});
if (!viewTransition.shouldAnimate) {
// no animated auto transition
transitionComplete();
}
}
// Make sure that transitionend events bubbling up from children won't fire
// transitionComplete. Will only go forward if ev.target == the element listening.
function completeOnTransitionEnd(ev) {
if (ev.target !== this) return;
transitionComplete();
}
function transitionComplete() {
if (transitionComplete.x) return;
transitionComplete.x = true;
enteringEle.off(TRANSITIONEND_EVENT, completeOnTransitionEnd);
$timeout.cancel(enteringEle.data(DATA_FALLBACK_TIMER));
leavingEle && $timeout.cancel(leavingEle.data(DATA_FALLBACK_TIMER));
// resolve that this one transition (there could be many w/ nested views)
deferred && deferred.resolve(navViewCtrl);
// the most recent transition added has completed and all the active
// transition promises should be added to the services array of promises
if (transitionId === transitionCounter) {
$q.all(transitionPromises).then(ionicViewSwitcher.transitionEnd);
// emit that the views have finished transitioning
// each parent nav-view will update which views are active and cached
switcher.emit('after', enteringData, leavingData);
switcher.cleanup(enteringData);
}
// tell the nav bars that the transition has ended
$ionicNavBarDelegate._instances.forEach(function(instance) {
instance.triggerTransitionEnd();
});
// remove any references that could cause memory issues
nextTransition = nextDirection = enteringView = leavingView = enteringEle = leavingEle = null;
}
// Make sure that transitionend events bubbling up from children won't fire
// transitionComplete. Will only go forward if ev.target == the element listening.
function cancelOnTransitionEnd(ev) {
if (ev.target !== this) return;
cancelTransition();
}
function cancelTransition() {
navViewAttr(enteringEle, VIEW_STATUS_CACHED);
navViewAttr(leavingEle, VIEW_STATUS_ACTIVE);
enteringEle.off(TRANSITIONEND_EVENT, cancelOnTransitionEnd);
$timeout.cancel(enteringEle.data(DATA_FALLBACK_TIMER));
ionicViewSwitcher.transitionEnd([navViewCtrl]);
}
},
emit: function(step, enteringData, leavingData) {
var enteringScope = enteringEle.scope(),
leavingScope = leavingEle && leavingEle.scope();
if (step == 'after') {
if (enteringScope) {
enteringScope.$emit('$ionicView.enter', enteringData);
}
if (leavingScope) {
leavingScope.$emit('$ionicView.leave', leavingData);
} else if (enteringScope && leavingData && leavingData.viewId) {
enteringScope.$emit('$ionicNavView.leave', leavingData);
}
}
if (enteringScope) {
enteringScope.$emit('$ionicView.' + step + 'Enter', enteringData);
}
if (leavingScope) {
leavingScope.$emit('$ionicView.' + step + 'Leave', leavingData);
} else if (enteringScope && leavingData && leavingData.viewId) {
enteringScope.$emit('$ionicNavView.' + step + 'Leave', leavingData);
}
},
cleanup: function(transData) {
// check if any views should be removed
if (leavingEle && transData.direction == 'back' && !$ionicConfig.views.forwardCache()) {
// if they just navigated back we can destroy the forward view
// do not remove forward views if cacheForwardViews config is true
destroyViewEle(leavingEle);
}
var viewElements = navViewCtrl.getViewElements();
var viewElementsLength = viewElements.length;
var x, viewElement;
var removeOldestAccess = (viewElementsLength - 1) > $ionicConfig.views.maxCache();
var removableEle;
var oldestAccess = Date.now();
for (x = 0; x < viewElementsLength; x++) {
viewElement = viewElements.eq(x);
if (removeOldestAccess && viewElement.data(DATA_VIEW_ACCESSED) < oldestAccess) {
// remember what was the oldest element to be accessed so it can be destroyed
oldestAccess = viewElement.data(DATA_VIEW_ACCESSED);
removableEle = viewElements.eq(x);
} else if (viewElement.data(DATA_DESTROY_ELE) && navViewAttr(viewElement) != VIEW_STATUS_ACTIVE) {
destroyViewEle(viewElement);
}
}
destroyViewEle(removableEle);
if (enteringEle.data(DATA_NO_CACHE)) {
enteringEle.data(DATA_DESTROY_ELE, true);
}
},
enteringEle: function() { return enteringEle; },
leavingEle: function() { return leavingEle; }
};
return switcher;
},
transitionEnd: function(navViewCtrls) {
forEach(navViewCtrls, function(navViewCtrl) {
navViewCtrl.transitionEnd();
});
ionicViewSwitcher.isTransitioning(false);
$ionicClickBlock.hide();
transitionPromises = [];
},
nextTransition: function(val) {
nextTransition = val;
},
nextDirection: function(val) {
nextDirection = val;
},
isTransitioning: function(val) {
if (arguments.length) {
ionic.transition.isActive = !!val;
$timeout.cancel(isActiveTimer);
if (val) {
isActiveTimer = $timeout(function() {
ionicViewSwitcher.isTransitioning(false);
}, 999);
}
}
return ionic.transition.isActive;
},
createViewEle: function(viewLocals) {
var containerEle = $document[0].createElement('div');
if (viewLocals && viewLocals.$template) {
containerEle.innerHTML = viewLocals.$template;
if (containerEle.children.length === 1) {
containerEle.children[0].classList.add('pane');
return jqLite(containerEle.children[0]);
}
}
containerEle.className = "pane";
return jqLite(containerEle);
},
viewEleIsActive: function(viewEle, isActiveAttr) {
navViewAttr(viewEle, isActiveAttr ? VIEW_STATUS_ACTIVE : VIEW_STATUS_CACHED);
},
getTransitionData: getTransitionData,
navViewAttr: navViewAttr,
destroyViewEle: destroyViewEle
};
return ionicViewSwitcher;
function getViewElementIdentifier(locals, view) {
if (viewState(locals)['abstract']) return viewState(locals).name;
if (view) return view.stateId || view.viewId;
return ionic.Utils.nextUid();
}
function viewState(locals) {
return locals && locals.$$state && locals.$$state.self || {};
}
function getTransitionData(viewLocals, enteringEle, direction, view) {
// Priority
// 1) attribute directive on the button/link to this view
// 2) entering element's attribute
// 3) entering view's $state config property
// 4) view registration data
// 5) global config
// 6) fallback value
var state = viewState(viewLocals);
var viewTransition = nextTransition || cachedAttr(enteringEle, 'view-transition') || state.viewTransition || $ionicConfig.views.transition() || 'ios';
var navBarTransition = $ionicConfig.navBar.transition();
direction = nextDirection || cachedAttr(enteringEle, 'view-direction') || state.viewDirection || direction || 'none';
return extend(getViewData(view), {
transition: viewTransition,
navBarTransition: navBarTransition === 'view' ? viewTransition : navBarTransition,
direction: direction,
shouldAnimate: (viewTransition !== 'none' && direction !== 'none')
});
}
function getViewData(view) {
view = view || {};
return {
viewId: view.viewId,
historyId: view.historyId,
stateId: view.stateId,
stateName: view.stateName,
stateParams: view.stateParams
};
}
function navViewAttr(ele, value) {
if (arguments.length > 1) {
cachedAttr(ele, NAV_VIEW_ATTR, value);
} else {
return cachedAttr(ele, NAV_VIEW_ATTR);
}
}
function destroyViewEle(ele) {
// we found an element that should be removed
// destroy its scope, then remove the element
if (ele && ele.length) {
var viewScope = ele.scope();
if (viewScope) {
viewScope.$emit('$ionicView.unloaded', ele.data(DATA_VIEW));
viewScope.$destroy();
}
ele.remove();
}
}
}]);
|