Merge pull request primefaces#15594 from RogueTea/table-clear-filters

Table: clear filter when dirty but not applied

src/app/components/table/table.ts

@@ -5327,6 +5327,8 @@ export class ColumnFilter implements AfterContentInit {
 
     overlayId: any;
 
+    applyHasBeenClicked: boolean = false;
+
     get fieldConstraints(): FilterMetadata[] | undefined | null {
         return this.dt.filters ? <FilterMetadata[]>this.dt.filters[<string>this.field] : null;
     }
@@ -5573,6 +5575,10 @@ export class ColumnFilter implements AfterContentInit {
     }
 
     onEscape() {
+        if (this.hasFilterNotBeenApplied()) {
+            this.clearFilter();
+        }
+        this.applyHasBeenClicked = false;
         this.overlayVisible = false;
         this.icon?.nativeElement.focus();
     }
@@ -5673,6 +5679,10 @@ export class ColumnFilter implements AfterContentInit {
         return false;
     }
 
+    hasFilterNotBeenApplied(): boolean {
+        return this.hasFilter() && !this.applyHasBeenClicked;
+    }
+
     isOutsideClicked(event: any): boolean {
         return !(
             DomHandler.hasClass(this.overlay?.nextElementSibling, 'p-overlay') ||
@@ -5747,6 +5757,10 @@ export class ColumnFilter implements AfterContentInit {
     }
 
     hide() {
+        if (this.hasFilterNotBeenApplied()) {
+            this.clearFilter();
+        }
+        this.applyHasBeenClicked = false;
         this.overlayVisible = false;
         this.cd.markForCheck();
     }
@@ -5759,12 +5773,14 @@ export class ColumnFilter implements AfterContentInit {
     }
 
     clearFilter() {
+        this.applyHasBeenClicked = false;
         this.initFieldFilterConstraint();
         this.dt._filter();
         if (this.hideOnClear) this.hide();
     }
 
     applyFilter() {
+        this.applyHasBeenClicked = true;
         this.dt._filter();
         this.hide();
     }