36db80d45f
arrayComputed was added recently in order to make array computations easier. Using arrayComputed we can improve LimitedArray which now uses an isolated multipurpose Ember.computed.limit.
27 lines
875 B
JavaScript
27 lines
875 B
JavaScript
Ember.computed.limit = function(dependentKey, limitKey) {
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var options = {
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addedItem: function(array, item, changeMeta, instanceMeta) {
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var limit = Ember.get(this, limitKey);
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if (changeMeta.index < limit) {
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array.insertAt(changeMeta.index, item);
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if (Ember.get(array, "length") > limit) {
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array.popObject();
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}
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}
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return array;
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},
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removedItem: function(array, item, changeMeta, instanceMeta) {
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var limit = Ember.get(this, limitKey);
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if (changeMeta.index < limit && changeMeta.index < Ember.get(array, 'length')) {
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array.removeAt(changeMeta.index, 1);
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var toPush = changeMeta.arrayChanged.objectAt(limit);
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if (toPush) {
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array.pushObject(toPush);
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}
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}
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return array;
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}
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};
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return Ember.arrayComputed(dependentKey, limitKey, options);
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};
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