我已經弄清楚如何修改路由系統,以便插入插座的視圖不被破壞。首先我重寫車把outlet
幫手,所以它加載一個Ember.OutletView
到{{outlet}}
:
Ember.Handlebars.registerHelper('outlet', function(property, options) {
if (property && property.data && property.data.isRenderData) {
options = property;
property = 'view';
}
options.hash.currentViewBinding = "controller." + property;
return Ember.Handlebars.helpers.view.call(this, Ember.OutletView, options);
});
凡Ember.OutletView
延伸Ember.ContainerView
如下:
Ember.OutletView = Ember.ContainerView.extend({
childViews: [],
_currentViewWillChange: Ember.beforeObserver(function() {
var childViews = this.get('childViews');
// Instead of removing currentView, just hide all childViews
childViews.setEach('isVisible', false);
}, 'currentView'),
_currentViewDidChange: Ember.observer(function() {
var childViews = this.get('childViews'),
currentView = this.get('currentView');
if (currentView) {
// Check if currentView is already within childViews array
// TODO: test
var alreadyPresent = childViews.find(function(child) {
if (Ember.View.isEqual(currentView, child, [])) {
return true;
}
});
if (!!alreadyPresent) {
alreadyPresent.set('isVisible', true);
} else {
childViews.pushObject(currentView);
}
}
}, 'currentView')
});
我們基本上覆蓋_currentViewWillChange()
,只是隱藏所有childViews
而不是取消的currentView
。然後在_currentViewDidChange()
我們檢查currentView
是否已經在childViews
之內,並據此採取行動。該Ember.View.isEqual
是Underscore isEqual
修改後的版本:
Ember.View.reopenClass({
isEqual: function(a, b, stack) {
// Identical objects are equal. `0 === -0`, but they aren't identical.
// See the Harmony `egal` proposal: http://wiki.ecmascript.org/doku.php?id=harmony:egal.
if (a === b) return a !== 0 || 1/a == 1/b;
// A strict comparison is necessary because `null == undefined`.
if (a == null || b == null) return a === b;
// Unwrap any wrapped objects.
if (a._chain) a = a._wrapped;
if (b._chain) b = b._wrapped;
// Compare `[[Class]]` names.
var className = toString.call(a);
if (className != toString.call(b)) return false;
if (typeof a != 'object' || typeof b != 'object') return false;
// Assume equality for cyclic structures. The algorithm for detecting cyclic
// structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
var length = stack.length;
while (length--) {
// Linear search. Performance is inversely proportional to the number of
// unique nested structures.
if (stack[length] == a) return true;
}
// Add the first object to the stack of traversed objects.
stack.push(a);
var size = 0, result = true;
// Recursively compare objects and arrays.
if (className == '[object Array]') {
// Compare array lengths to determine if a deep comparison is necessary.
size = a.length;
result = size == b.length;
if (result) {
// Deep compare the contents, ignoring non-numeric properties.
while (size--) {
// Ensure commutative equality for sparse arrays.
if (!(result = size in a == size in b && this.isEqual(a[size], b[size], stack))) break;
}
}
} else {
// Objects with different constructors are not equivalent.
if (a.get('constructor').toString() != b.get('constructor').toString()) {
return false;
}
// Deep compare objects.
for (var key in a) {
if (a.hasOwnProperty(key)) {
// Count the expected number of properties.
size++;
// Deep compare each member.
if (!(result = b.hasOwnProperty(key))) break;
}
}
}
// Remove the first object from the stack of traversed objects.
stack.pop();
return result;
}
});
扎克, 我認爲你可以完成這些額外的功能,如果你讓你的頂層出口處的'ContainerView'。然後,您可以通過'childViews'屬性直接操作它的子項,並且可以控制子視圖是被刪除還是隱藏。 –