refactor(forms): deprecate unwanted control events aliases (#55698)

This commit deprecates the aliases for the control events to ease the changes in G3
A follow-up commit will remove those deprecated entries.

PR Close #55698

goldens/public-api/forms/index.md

@@ -800,6 +800,10 @@ export class PatternValidator extends AbstractValidatorDirective {
 }
 
 // @public
+export class PristineChangeEvent extends PristineEvent {
+}
+
+// @public @deprecated (undocumented)
 export class PristineEvent extends ControlEvent {
     constructor(pristine: boolean, source: AbstractControl);
     // (undocumented)
@@ -894,6 +898,10 @@ export class SelectMultipleControlValueAccessor extends BuiltInControlValueAcces
 export type SetDisabledStateOption = 'whenDisabledForLegacyCode' | 'always';
 
 // @public
+export class StatusChangeEvent extends StatusEvent {
+}
+
+// @public @deprecated (undocumented)
 export class StatusEvent extends ControlEvent {
     constructor(status: FormControlStatus, source: AbstractControl);
     // (undocumented)
@@ -903,6 +911,10 @@ export class StatusEvent extends ControlEvent {
 }
 
 // @public
+export class TouchedChangeEvent extends TouchedEvent {
+}
+
+// @public @deprecated (undocumented)
 export class TouchedEvent extends ControlEvent {
     constructor(touched: boolean, source: AbstractControl);
     // (undocumented)

packages/core/test/bundling/forms_reactive/bundle.golden_symbols.json

@@ -479,6 +479,9 @@
   {
     "name": "PristineChangeEvent"
   },
+  {
+    "name": "PristineEvent"
+  },
   {
     "name": "R3Injector"
   },
@@ -548,6 +551,9 @@
   {
     "name": "StatusChangeEvent"
   },
+  {
+    "name": "StatusEvent"
+  },
   {
     "name": "Subject"
   },
@@ -587,6 +593,9 @@
   {
     "name": "TouchedChangeEvent"
   },
+  {
+    "name": "TouchedEvent"
+  },
   {
     "name": "USE_VALUE"
   },

packages/core/test/bundling/forms_template_driven/bundle.golden_symbols.json

@@ -464,6 +464,9 @@
   {
     "name": "PristineChangeEvent"
   },
+  {
+    "name": "PristineEvent"
+  },
   {
     "name": "R3Injector"
   },
@@ -530,6 +533,9 @@
   {
     "name": "StatusChangeEvent"
   },
+  {
+    "name": "StatusEvent"
+  },
   {
     "name": "Subject"
   },
@@ -575,6 +581,9 @@
   {
     "name": "TouchedChangeEvent"
   },
+  {
+    "name": "TouchedEvent"
+  },
   {
     "name": "USE_VALUE"
   },

packages/forms/src/forms.ts

@@ -76,9 +76,12 @@ export {
   FormControlStatus,
   FormResetEvent,
   FormSubmittedEvent,
-  PristineChangeEvent as PristineEvent,
-  StatusChangeEvent as StatusEvent,
-  TouchedChangeEvent as TouchedEvent,
+  PristineEvent,
+  StatusEvent,
+  TouchedEvent,
+  PristineChangeEvent,
+  StatusChangeEvent,
+  TouchedChangeEvent,
   ValueChangeEvent,
   ɵCoerceStrArrToNumArr,
   ɵGetProperty,

packages/forms/src/model/abstract_model.ts

@@ -102,14 +102,33 @@ export class ValueChangeEvent<T> extends ControlEvent<T> {
   }
 }
 
+/**
+ * @deprecated use `PristineChangeEvent` symbol instead.
+ */
+
+export class PristineEvent extends ControlEvent {
+  constructor(
+    public readonly pristine: boolean,
+    public readonly source: AbstractControl,
+  ) {
+    super();
+  }
+}
+
 /**
  * Event fired when the control's pristine state changes (pristine <=> dirty).
  *
  * @publicApi
  */
-export class PristineChangeEvent extends ControlEvent {
+
+export class PristineChangeEvent extends PristineEvent {}
+
+/**
+ * @deprecated use `TouchedChangeEvent` symbol instead.
+ */
+export class TouchedEvent extends ControlEvent {
   constructor(
-    public readonly pristine: boolean,
+    public readonly touched: boolean,
     public readonly source: AbstractControl,
   ) {
     super();
@@ -121,9 +140,14 @@ export class PristineChangeEvent extends ControlEvent {
  *
  * @publicApi
  */
-export class TouchedChangeEvent extends ControlEvent {
+export class TouchedChangeEvent extends TouchedEvent {}
+
+/**
+ * @deprecated use `StatusChangeEvent` symbol instead.
+ */
+export class StatusEvent extends ControlEvent {
   constructor(
-    public readonly touched: boolean,
+    public readonly status: FormControlStatus,
     public readonly source: AbstractControl,
   ) {
     super();
@@ -135,14 +159,7 @@ export class TouchedChangeEvent extends ControlEvent {
  *
  * @publicApi
  */
-export class StatusChangeEvent extends ControlEvent {
-  constructor(
-    public readonly status: FormControlStatus,
-    public readonly source: AbstractControl,
-  ) {
-    super();
-  }
-}
+export class StatusChangeEvent extends StatusEvent {}
 
 /**
  * Event fired when a form is submitted