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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,261 @@ | ||
| namespace Fabulous.Avalonia | ||
|
|
||
| open System.Collections | ||
| open System.ComponentModel | ||
| open Avalonia | ||
| open Avalonia.Collections | ||
| open Avalonia.Interactivity | ||
| open Fabulous | ||
| open Fabulous.ScalarAttributeDefinitions | ||
|
|
||
| [<Struct>] | ||
| type ComponentValueEventData<'data, 'eventArgs> = | ||
| { Value: 'data voption | ||
| Event: 'eventArgs -> MsgValue } | ||
|
|
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| module ComponentValueEventData = | ||
| let create (value: 'data) (event: 'eventArgs -> 'msg) = | ||
| { Value = ValueSome value | ||
| Event = event >> box >> MsgValue } | ||
|
|
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| let createVOption (value: 'data voption) (event: 'eventArgs -> 'msg) = | ||
| { Value = value | ||
| Event = event >> box >> MsgValue } | ||
|
|
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| module ComponentAttributes = | ||
| let inline defineAvaloniaPropertyWithChangedEvent<'modelType, 'valueType> | ||
| name | ||
| (property: AvaloniaProperty<'valueType>) | ||
| ([<InlineIfLambda>] convertToValue: 'modelType -> 'valueType) | ||
| ([<InlineIfLambda>] convertToModel: 'valueType -> 'modelType) | ||
| : SimpleScalarAttributeDefinition<ComponentValueEventData<'modelType, 'modelType>> = | ||
|
|
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| let key = | ||
| SimpleScalarAttributeDefinition.CreateAttributeData( | ||
| ScalarAttributeComparers.noCompare, | ||
| (fun oldValueOpt (newValueOpt: ComponentValueEventData<'modelType, 'modelType> voption) node -> | ||
| let target = node.Target :?> AvaloniaObject | ||
|
|
||
| // The attribute is no longer applied, so we clean up the event | ||
| match node.TryGetHandler(property.Name) with | ||
| | ValueNone -> () | ||
| | ValueSome handler -> handler.Dispose() | ||
|
|
||
| match newValueOpt with | ||
| | ValueNone -> | ||
| match oldValueOpt with | ||
| | ValueNone -> () | ||
| | ValueSome _ -> target.ClearValue(property) | ||
|
|
||
| | ValueSome curr -> | ||
| // Clean up the old event handler if any | ||
| match node.TryGetHandler(property.Name) with | ||
| | ValueNone -> () | ||
| | ValueSome handler -> handler.Dispose() | ||
|
|
||
| // Set the new value | ||
|
|
||
| match curr.Value with | ||
| | ValueNone -> () | ||
| | ValueSome v -> | ||
| let newValue = convertToValue v | ||
| target.SetValue(property, box newValue) |> ignore | ||
|
|
||
| // Set the new event handler | ||
| let disposable = property.Changed.Subscribe(fun args -> curr.Event |> ignore) | ||
|
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| node.SetHandler(property.Name, disposable)) | ||
| ) | ||
| |> AttributeDefinitionStore.registerScalar | ||
|
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| { Key = key; Name = name } | ||
|
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| let defineAvaloniaPropertyWithChangedEvent'<'T> name (property: AvaloniaProperty<'T>) : SimpleScalarAttributeDefinition<ComponentValueEventData<'T, 'T>> = | ||
| defineAvaloniaPropertyWithChangedEvent<'T, 'T> name property id id | ||
|
|
||
| let defineRoutedEvent<'args when 'args :> RoutedEventArgs> name (property: RoutedEvent<'args>) : SimpleScalarAttributeDefinition<'args -> MsgValue> = | ||
| let key = | ||
| SimpleScalarAttributeDefinition.CreateAttributeData( | ||
| ScalarAttributeComparers.noCompare, | ||
| (fun _ (newValueOpt: ('args -> MsgValue) voption) (node: IViewNode) -> | ||
| match node.TryGetHandler(name) with | ||
| | ValueNone -> () | ||
| | ValueSome handler -> handler.Dispose() | ||
|
|
||
| match newValueOpt with | ||
| | ValueNone -> node.Dispose() | ||
|
|
||
| | ValueSome fn -> | ||
| let event = property.AddClassHandler(fun _ args -> fn args |> ignore) | ||
|
|
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| node.SetHandler(name, event)) | ||
| ) | ||
| |> AttributeDefinitionStore.registerScalar | ||
|
|
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| { Key = key; Name = name } | ||
|
|
||
| let inline defineCancelEvent | ||
| name | ||
| ([<InlineIfLambda>] getEvent: obj -> IEvent<CancelEventHandler, CancelEventArgs>) | ||
| : SimpleScalarAttributeDefinition<CancelEventArgs -> MsgValue> = | ||
| let key = | ||
| SimpleScalarAttributeDefinition.CreateAttributeData( | ||
| ScalarAttributeComparers.noCompare, | ||
| (fun _ (newValueOpt: (CancelEventArgs -> MsgValue) voption) (node: IViewNode) -> | ||
| match node.TryGetHandler(name) with | ||
| | ValueNone -> () | ||
| | ValueSome handler -> handler.Dispose() | ||
|
|
||
| match newValueOpt with | ||
| | ValueNone -> node.Dispose() | ||
|
|
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| | ValueSome fn -> | ||
| let event = getEvent node.Target | ||
|
|
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| let handler = event.Subscribe(fun args -> fn args |> ignore) | ||
|
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| node.SetHandler(name, handler)) | ||
| ) | ||
| |> AttributeDefinitionStore.registerScalar | ||
|
|
||
| { Key = key; Name = name } | ||
|
|
||
| /// Define an attribute storing a collection of Widget for a List<T> property | ||
| let inline defineAvaloniaNonGenericListWidgetCollection name ([<InlineIfLambda>] getCollection: obj -> IList) = | ||
| let applyDiff _ (diffs: WidgetCollectionItemChanges) (node: IViewNode) = | ||
| let targetColl = getCollection node.Target | ||
|
|
||
| for diff in diffs do | ||
| match diff with | ||
| | WidgetCollectionItemChange.Remove(index, widget) -> | ||
| let itemNode = node.TreeContext.GetViewNode(targetColl[index]) | ||
|
|
||
| // FIXME ? Trigger the unmounted event | ||
| // // Trigger the unmounted event | ||
| // Dispatcher.dispatchEventForAllChildren itemNode widget ComponentLifecycle.Unmounted | ||
| itemNode.Dispose() | ||
|
|
||
| // Remove the child from the UI tree | ||
| targetColl.RemoveAt(index) | ||
|
|
||
| | _ -> () | ||
|
|
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| for diff in diffs do | ||
| match diff with | ||
| | WidgetCollectionItemChange.Insert(index, widget) -> | ||
| let struct (itemNode, view) = Helpers.createViewForWidget node widget | ||
|
|
||
| // Insert the new child into the UI tree | ||
| targetColl.Insert(index, unbox view) | ||
|
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||
| // FIXME ? Trigger the unmounted event | ||
| // Trigger the mounted event | ||
| // Dispatcher.dispatchEventForAllChildren itemNode widget ComponentLifecycle.Mounted | ||
|
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| | WidgetCollectionItemChange.Update(index, widgetDiff) -> | ||
| let childNode = node.TreeContext.GetViewNode(targetColl[index]) | ||
|
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| childNode.ApplyDiff(&widgetDiff) | ||
|
|
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| | WidgetCollectionItemChange.Replace(index, oldWidget, newWidget) -> | ||
| let prevItemNode = node.TreeContext.GetViewNode(targetColl[index]) | ||
|
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| let struct (nextItemNode, view) = Helpers.createViewForWidget node newWidget | ||
|
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| // FIXME ? Trigger the unmounted event | ||
| // Trigger the unmounted event for the old child | ||
| // Dispatcher.dispatchEventForAllChildren prevItemNode oldWidget ComponentLifecycle.Unmounted | ||
| prevItemNode.Dispose() | ||
|
|
||
| // Replace the existing child in the UI tree at the index with the new one | ||
| targetColl[index] <- view | ||
|
|
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| // Trigger the mounted event for the new child | ||
| // FIXME ? Trigger the unmounted event | ||
| // Dispatcher.dispatchEventForAllChildren nextItemNode newWidget ComponentLifecycle.Mounted | ||
|
|
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| | _ -> () | ||
|
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| let updateNode _ (newValueOpt: ArraySlice<Widget> voption) (node: IViewNode) = | ||
| let targetColl = getCollection node.Target | ||
| targetColl.Clear() | ||
|
|
||
| match newValueOpt with | ||
| | ValueNone -> () | ||
| | ValueSome widgets -> | ||
| for widget in ArraySlice.toSpan widgets do | ||
| let struct (_, view) = Helpers.createViewForWidget node widget | ||
|
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| targetColl.Add(view) |> ignore | ||
|
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| Attributes.defineWidgetCollection name applyDiff updateNode | ||
|
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| /// Define an attribute storing a collection of Widget for a AvaloniaList<T> property | ||
| let defineAvaloniaListWidgetCollection<'itemType> name (getCollection: obj -> IAvaloniaList<'itemType>) = | ||
| let applyDiff _ (diffs: WidgetCollectionItemChanges) (node: IViewNode) = | ||
| let targetColl = getCollection node.Target | ||
|
|
||
| for diff in diffs do | ||
| match diff with | ||
| | WidgetCollectionItemChange.Remove(index, widget) -> | ||
| let itemNode = node.TreeContext.GetViewNode(box targetColl[index]) | ||
|
|
||
| // Trigger the unmounted event | ||
| // FIXME ? Trigger the unmounted event | ||
| // Dispatcher.dispatchEventForAllChildren itemNode widget ComponentLifecycle.Unmounted | ||
| itemNode.Dispose() | ||
|
|
||
| // Remove the child from the UI tree | ||
| targetColl.RemoveAt(index) | ||
|
|
||
| | _ -> () | ||
|
|
||
| for diff in diffs do | ||
| match diff with | ||
| | WidgetCollectionItemChange.Insert(index, widget) -> | ||
| let struct (itemNode, view) = Helpers.createViewForWidget node widget | ||
|
|
||
| // Insert the new child into the UI tree | ||
| targetColl.Insert(index, unbox view) | ||
|
|
||
| // Trigger the mounted event | ||
| // FIXME ? Trigger the unmounted event | ||
| // Dispatcher.dispatchEventForAllChildren itemNode widget ComponentLifecycle.Mounted | ||
|
|
||
| | WidgetCollectionItemChange.Update(index, widgetDiff) -> | ||
| let childNode = node.TreeContext.GetViewNode(box targetColl[index]) | ||
|
|
||
| childNode.ApplyDiff(&widgetDiff) | ||
|
|
||
| | WidgetCollectionItemChange.Replace(index, oldWidget, newWidget) -> | ||
| let prevItemNode = node.TreeContext.GetViewNode(box targetColl[index]) | ||
|
|
||
| let struct (nextItemNode, view) = Helpers.createViewForWidget node newWidget | ||
|
|
||
| // FIXME ? Trigger the unmounted event | ||
| // Trigger the unmounted event for the old child | ||
| // Dispatcher.dispatchEventForAllChildren prevItemNode oldWidget ComponentLifecycle.Unmounted | ||
| prevItemNode.Dispose() | ||
|
|
||
| // Replace the existing child in the UI tree at the index with the new one | ||
| targetColl[index] <- unbox view | ||
|
|
||
| // Trigger the mounted event for the new child | ||
| // FIXME ? Trigger the unmounted event | ||
| // Dispatcher.dispatchEventForAllChildren nextItemNode newWidget ComponentLifecycle.Mounted | ||
|
|
||
| | _ -> () | ||
|
|
||
| let updateNode _ (newValueOpt: ArraySlice<Widget> voption) (node: IViewNode) = | ||
| let targetColl = getCollection node.Target | ||
| targetColl.Clear() | ||
|
|
||
| match newValueOpt with | ||
| | ValueNone -> () | ||
| | ValueSome widgets -> | ||
| for widget in ArraySlice.toSpan widgets do | ||
| let struct (_, view) = Helpers.createViewForWidget node widget | ||
|
|
||
| targetColl.Add(unbox view) | ||
|
|
||
| Attributes.defineWidgetCollection name applyDiff updateNode |
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