Make isFocusTrapEnabled internal, removing it from docs. (#7298)

BREAKING CHANGE: `isFocusTrapEnabled` is now properly marked internal.

src/cdk/a11y/focus-trap.spec.ts

@@ -103,7 +103,7 @@ describe('FocusTrap', () => {
 
       expect(anchors.every(current => current.getAttribute('tabindex') === '0')).toBe(true);
 
-      fixture.componentInstance.isFocusTrapEnabled = false;
+      fixture.componentInstance._isFocusTrapEnabled = false;
       fixture.detectChanges();
 
       expect(anchors.every(current => current.getAttribute('tabindex') === '-1')).toBe(true);
@@ -172,7 +172,7 @@ class SimpleFocusTrap {
 
 @Component({
   template: `
-    <div *ngIf="renderFocusTrap" [cdkTrapFocus]="isFocusTrapEnabled">
+    <div *ngIf="renderFocusTrap" [cdkTrapFocus]="_isFocusTrapEnabled">
       <input>
       <button>SAVE</button>
     </div>
@@ -181,7 +181,7 @@ class SimpleFocusTrap {
 class FocusTrapWithBindings {
   @ViewChild(FocusTrapDirective) focusTrapDirective: FocusTrapDirective;
   renderFocusTrap = true;
-  isFocusTrapEnabled = true;
+  _isFocusTrapEnabled = true;
 }
 
 

src/lib/sidenav/drawer.ts

@@ -211,7 +211,7 @@ export class MatDrawer implements AfterContentInit, OnDestroy {
    */
   _modeChanged = new Subject();
 
-  get isFocusTrapEnabled() {
+  get _isFocusTrapEnabled() {
     // The focus trap is only enabled when the drawer is open in any mode other than side.
     return this.opened && this.mode !== 'side';
   }
@@ -224,7 +224,7 @@ export class MatDrawer implements AfterContentInit, OnDestroy {
         this._elementFocusedBeforeDrawerWasOpened = this._doc.activeElement as HTMLElement;
       }
 
-      if (this.isFocusTrapEnabled && this._focusTrap) {
+      if (this._isFocusTrapEnabled && this._focusTrap) {
         this._focusTrap.focusInitialElementWhenReady();
       }
     });
@@ -251,7 +251,7 @@ export class MatDrawer implements AfterContentInit, OnDestroy {
 
   ngAfterContentInit() {
     this._focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement);
-    this._focusTrap.enabled = this.isFocusTrapEnabled;
+    this._focusTrap.enabled = this._isFocusTrapEnabled;
     this._enableAnimations = true;
   }
 
@@ -301,7 +301,7 @@ export class MatDrawer implements AfterContentInit, OnDestroy {
       });
 
       if (this._focusTrap) {
-        this._focusTrap.enabled = this.isFocusTrapEnabled;
+        this._focusTrap.enabled = this._isFocusTrapEnabled;
       }
     }