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misc small fixes/improvements & initial famousEach implementation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| var OP = { | ||
| NULL: 0, | ||
| ADDED_AT: 1, | ||
| REMOVED_AT: 2 | ||
| }; | ||
|
|
||
| var currentOp = { type: OP.NULL }; | ||
|
|
||
| function famousEachRender(eachView, template, argFunc) { | ||
| var fview = eachView._fview; | ||
| var children = fview.eachChildren = []; // each contentBlock instance | ||
|
|
||
| // For Blaze.currentView (see blaze/builtins.js#each) | ||
| eachView.argVar = new Blaze.ReactiveVar(); | ||
| eachView.autorun(function () { | ||
| eachView.argVar.set(argFunc()); | ||
| }, eachView.parentView); | ||
|
|
||
| eachView.stopHandle = ObserveSequence.observe(function () { | ||
| return eachView.argVar.get(); | ||
| }, { | ||
| addedAt: function (id, item, index) { | ||
| // Deferred since could trigger any time and Blaze stuff takes time | ||
| FView.defer(function() { | ||
| var newItemView = Blaze.With(item, function() { | ||
| return template.constructView(); | ||
| }); | ||
|
|
||
| /* | ||
| * During Blaze.render(), newNode.addToParent() calls | ||
| * FamousEach.addChild() which calls GrandParent.addedAt() | ||
| * using the stored data below. | ||
| */ | ||
| currentOp.type = OP.ADDED_AT; | ||
| currentOp.index = index; | ||
| currentOp.id = id; | ||
| currentOp.item = item; | ||
| children.splice(index, 0, newItemView); | ||
| Blaze.render(newItemView, unusedDiv, eachView); | ||
| currentOp.type = OP.NULL; | ||
| }); | ||
| }, | ||
| removedAt: function (id, item, index) { | ||
| // Deferred since could trigger any time and Blaze stuff takes time | ||
| FView.defer(function() { | ||
| // same deal as addedAt | ||
| currentOp.type = OP.REMOVED_AT; | ||
| currentOp.index = index; | ||
| currentOp.id = id; | ||
| currentOp.item = item; | ||
| Blaze.remove(children[index]); | ||
| children.splice(index, 1); | ||
| currentOp.type = OP.NULL; | ||
| }); | ||
| }, | ||
| changedAt: function (id, newItem, oldItem, index) { | ||
| // Deferred only to maintain order with addedAt/removedAt | ||
| FView.defer(function() { | ||
| children[index].dataVar.set(newItem); | ||
| fview.parent.fvClass.changedAt.call(fview.parent, | ||
| id, newItem, oldItem, index); | ||
| }); | ||
| }, | ||
| movedTo: function (id, doc, fromIndex, toIndex) { | ||
| // Deferred only to maintain order with addedAt/removedAt | ||
| FView.defer(function() { | ||
| item = children.splice(fromIndex, 1)[0]; | ||
| children.splice(toIndex, 0, item); | ||
| fview.parent.fvClass.movedTo.call(fview.parent, | ||
| id, doc, fromIndex, toIndex); | ||
| }); | ||
| } | ||
| }); | ||
| } | ||
|
|
||
| var famousEachClass = { | ||
|
|
||
| addChild: function(child) { | ||
| if (currentOp.type !== OP.ADDED_AT) | ||
| throw new Error("we broke :("); | ||
| // this = fview | ||
| // need to diff famousEach position in child list | ||
| this.parent.fvClass.addedAt.call(this.parent, | ||
| currentOp.id, child, currentOp.index); | ||
| }, | ||
|
|
||
| removeChild: function(child) { | ||
| if (currentOp.type !== OP.REMOVED_AT) | ||
| throw new Error("we broke :("); | ||
| // this = fview | ||
| // need to diff famousEach position in child list | ||
| this.parent.fvClass.removedAt.call(this.parent, | ||
| currentOp.id, child, currentOp.index); | ||
| } | ||
|
|
||
| }; | ||
|
|
||
| function famousEachCreated() { | ||
| var blazeView = this.view; | ||
| var fview = new MeteorFamousView(fviewParentFromBlazeView(blazeView), | ||
| null /* id */, 'FamousEach', parentDetails(blazeView)); | ||
| blazeView._fview = fview; | ||
| fview.fvClass = famousEachClass; | ||
|
|
||
| // Contents of {{#famousEach}}block{{/famousEach}} | ||
| if (blazeView.templateContentBlock) | ||
| famousEachRender(blazeView, blazeView.templateContentBlock, function() { | ||
| return Blaze.getData(blazeView); | ||
| }); | ||
| } | ||
|
|
||
| function famousEachDestroyed() { | ||
| this.view._fview.destroy(true); | ||
| } | ||
|
|
||
| var famousEachView = new Blaze.Template( | ||
| 'FamousEach', | ||
| function() { return null; } | ||
| ); | ||
| famousEachView.created = famousEachCreated; | ||
| famousEachView.destroyed = famousEachDestroyed; | ||
|
|
||
| Blaze.registerHelper('famousEach', famousEachView); |
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