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custom.ts
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custom.ts
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import { Factory } from '@ember/-internals/owner';
import { assert } from '@ember/debug';
import { DEBUG } from '@glimmer/env';
import { Arguments, ModifierManager, VMArguments } from '@glimmer/interfaces';
import { registerDestructor, reifyArgs } from '@glimmer/runtime';
import { createUpdatableTag, untrack, UpdatableTag } from '@glimmer/validator';
import { SimpleElement } from '@simple-dom/interface';
import { argsProxyFor } from '../utils/args-proxy';
export interface CustomModifierDefinitionState<ModifierInstance> {
ModifierClass: Factory<ModifierInstance>;
name: string;
delegate: ModifierManagerDelegate<ModifierInstance>;
}
export interface OptionalCapabilities {
'3.13': {
disableAutoTracking?: boolean;
};
// uses args proxy, does not provide a way to opt-out
'3.22': {
disableAutoTracking?: boolean;
};
}
export interface Capabilities {
disableAutoTracking: boolean;
useArgsProxy: boolean;
}
export function capabilities<Version extends keyof OptionalCapabilities>(
managerAPI: Version,
optionalFeatures: OptionalCapabilities[Version] = {}
): Capabilities {
assert(
'Invalid modifier manager compatibility specified',
managerAPI === '3.13' || managerAPI === '3.22'
);
return {
disableAutoTracking: Boolean(optionalFeatures.disableAutoTracking),
useArgsProxy: managerAPI === '3.13' ? false : true,
};
}
export class CustomModifierDefinition<ModifierInstance> {
public state: CustomModifierDefinitionState<ModifierInstance>;
public manager: ModifierManager<unknown | null, CustomModifierDefinitionState<ModifierInstance>>;
constructor(
public name: string,
public ModifierClass: Factory<ModifierInstance>,
public delegate: ModifierManagerDelegate<ModifierInstance>,
isInteractive: boolean
) {
this.state = {
ModifierClass,
name,
delegate,
};
this.manager = isInteractive
? CUSTOM_INTERACTIVE_MODIFIER_MANAGER
: CUSTOM_NON_INTERACTIVE_MODIFIER_MANAGER;
}
}
export interface CustomModifierState<ModifierInstance> {
tag: UpdatableTag;
element: SimpleElement;
delegate: ModifierManagerDelegate<ModifierInstance>;
modifier: ModifierInstance;
args: Arguments;
debugName?: string;
}
export interface ModifierManagerDelegate<ModifierInstance> {
capabilities: Capabilities;
createModifier(factory: unknown, args: Arguments): ModifierInstance;
installModifier(instance: ModifierInstance, element: SimpleElement, args: Arguments): void;
updateModifier(instance: ModifierInstance, args: Arguments): void;
destroyModifier(instance: ModifierInstance, args: Arguments): void;
}
/**
The CustomModifierManager allows addons to provide custom modifier
implementations that integrate seamlessly into Ember. This is accomplished
through a delegate, registered with the custom modifier manager, which
implements a set of hooks that determine modifier behavior.
To create a custom modifier manager, instantiate a new CustomModifierManager
class and pass the delegate as the first argument:
```js
let manager = new CustomModifierManager({
// ...delegate implementation...
});
```
## Delegate Hooks
Throughout the lifecycle of a modifier, the modifier manager will invoke
delegate hooks that are responsible for surfacing those lifecycle changes to
the end developer.
* `createModifier()` - invoked when a new instance of a modifier should be created
* `installModifier()` - invoked when the modifier is installed on the element
* `updateModifier()` - invoked when the arguments passed to a modifier change
* `destroyModifier()` - invoked when the modifier is about to be destroyed
*/
class InteractiveCustomModifierManager<ModifierInstance>
implements
ModifierManager<
CustomModifierState<ModifierInstance>,
CustomModifierDefinitionState<ModifierInstance>
> {
create(
element: SimpleElement,
definition: CustomModifierDefinitionState<ModifierInstance>,
vmArgs: VMArguments
) {
let { delegate, ModifierClass } = definition;
let capturedArgs = vmArgs.capture();
assert(
'Custom modifier managers must define their capabilities using the capabilities() helper function',
typeof delegate.capabilities === 'object' && delegate.capabilities !== null
);
let useArgsProxy = delegate.capabilities.useArgsProxy;
let args = useArgsProxy ? argsProxyFor(capturedArgs, 'modifier') : reifyArgs(capturedArgs);
let instance = delegate.createModifier(ModifierClass, args);
let tag = createUpdatableTag();
let state: CustomModifierState<ModifierInstance>;
if (useArgsProxy) {
state = {
tag,
element,
delegate,
args,
modifier: instance,
};
} else {
state = {
tag,
element,
delegate,
modifier: instance,
get args() {
return reifyArgs(capturedArgs);
},
};
}
if (DEBUG) {
state.debugName = definition.name;
}
registerDestructor(state, () => delegate.destroyModifier(instance, state.args));
return state;
}
getDebugName({ debugName }: CustomModifierState<ModifierInstance>) {
return debugName!;
}
getTag({ tag }: CustomModifierState<ModifierInstance>) {
return tag;
}
install(state: CustomModifierState<ModifierInstance>) {
let { element, args, delegate, modifier } = state;
let { capabilities } = delegate;
if (capabilities.disableAutoTracking === true) {
untrack(() => delegate.installModifier(modifier, element, args));
} else {
delegate.installModifier(modifier, element, args);
}
}
update(state: CustomModifierState<ModifierInstance>) {
let { args, delegate, modifier } = state;
let { capabilities } = delegate;
if (capabilities.disableAutoTracking === true) {
untrack(() => delegate.updateModifier(modifier, args));
} else {
delegate.updateModifier(modifier, args);
}
}
getDestroyable(state: CustomModifierState<ModifierInstance>) {
return state;
}
}
class NonInteractiveCustomModifierManager<ModifierInstance>
implements ModifierManager<null, CustomModifierDefinitionState<ModifierInstance>> {
create() {
return null;
}
getDebugName() {
return '';
}
getTag() {
return null;
}
install() {}
update() {}
getDestroyable() {
return null;
}
}
const CUSTOM_INTERACTIVE_MODIFIER_MANAGER = new InteractiveCustomModifierManager();
const CUSTOM_NON_INTERACTIVE_MODIFIER_MANAGER = new NonInteractiveCustomModifierManager();