fix(chips): chip list overriding chip disabled value (#19228)

When a chip list is disabled, it goes through all the chips and sets their `disabled` values. The problem is that this overrides any individual values the consumer may have set. These changes fix the issue by saving the value to a different field.

Fixes #19213.

src/material/chips/chip-list.spec.ts

@@ -112,6 +112,28 @@ describe('MatChipList', () => {
         expect(chips.toArray().every(chip => chip.disabled)).toBe(true);
       }));
 
+      it('should preserve the disabled state of a chip if the list gets re-enabled', () => {
+        const chipArray = chips.toArray();
+
+        chipArray[2].disabled = true;
+        fixture.detectChanges();
+
+        expect(chips.toArray().map(chip => chip.disabled))
+            .toEqual([false, false, true, false, false]);
+
+        chipListInstance.disabled = true;
+        fixture.detectChanges();
+
+        expect(chips.toArray().map(chip => chip.disabled))
+            .toEqual([true, true, true, true, true]);
+
+        chipListInstance.disabled = false;
+        fixture.detectChanges();
+
+        expect(chips.toArray().map(chip => chip.disabled))
+            .toEqual([false, false, true, false, false]);
+      });
+
     });
 
     describe('with selected chips', () => {

src/material/chips/chip-list.ts

@@ -808,7 +808,7 @@ export class MatChipList extends _MatChipListMixinBase implements MatFormFieldCo
   private _syncChipsState() {
     if (this.chips) {
       this.chips.forEach(chip => {
-        chip.disabled = this._disabled;
+        chip._chipListDisabled = this._disabled;
         chip._chipListMultiple = this.multiple;
       });
     }

src/material/chips/chip.ts

@@ -29,16 +29,13 @@ import {
 import {
   CanColor,
   CanColorCtor,
-  CanDisable,
-  CanDisableCtor,
   CanDisableRipple,
   CanDisableRippleCtor,
   HasTabIndex,
   HasTabIndexCtor,
   mixinTabIndex,
   MAT_RIPPLE_GLOBAL_OPTIONS,
   mixinColor,
-  mixinDisabled,
   mixinDisableRipple,
   RippleConfig,
   RippleGlobalOptions,
@@ -71,12 +68,13 @@ export class MatChipSelectionChange {
 // Boilerplate for applying mixins to MatChip.
 /** @docs-private */
 class MatChipBase {
+  disabled: boolean;
   constructor(public _elementRef: ElementRef) {}
 }
 
-const _MatChipMixinBase: CanColorCtor & CanDisableRippleCtor & CanDisableCtor &
+const _MatChipMixinBase: CanColorCtor & CanDisableRippleCtor &
     HasTabIndexCtor & typeof MatChipBase =
-      mixinTabIndex(mixinColor(mixinDisableRipple(mixinDisabled(MatChipBase)), 'primary'), -1);
+      mixinTabIndex(mixinColor(mixinDisableRipple(MatChipBase), 'primary'), -1);
 
 /**
  * Dummy directive to add CSS class to chip avatar.
@@ -103,7 +101,7 @@ export class MatChipTrailingIcon {}
  */
 @Directive({
   selector: `mat-basic-chip, [mat-basic-chip], mat-chip, [mat-chip]`,
-  inputs: ['color', 'disabled', 'disableRipple', 'tabIndex'],
+  inputs: ['color', 'disableRipple', 'tabIndex'],
   exportAs: 'matChip',
   host: {
     'class': 'mat-chip mat-focus-indicator',
@@ -124,7 +122,7 @@ export class MatChipTrailingIcon {}
   },
 })
 export class MatChip extends _MatChipMixinBase implements FocusableOption, OnDestroy, CanColor,
-    CanDisable, CanDisableRipple, RippleTarget, HasTabIndex {
+  CanDisableRipple, RippleTarget, HasTabIndex {
 
   /** Reference to the RippleRenderer for the chip. */
   private _chipRipple: RippleRenderer;
@@ -164,6 +162,9 @@ export class MatChip extends _MatChipMixinBase implements FocusableOption, OnDes
   /** Whether the chip list is in multi-selection mode. */
   _chipListMultiple: boolean = false;
 
+  /** Whether the chip list as a whole is disabled. */
+  _chipListDisabled: boolean = false;
+
   /** The chip avatar */
   @ContentChild(MatChipAvatar) avatar: MatChipAvatar;
 
@@ -209,6 +210,14 @@ export class MatChip extends _MatChipMixinBase implements FocusableOption, OnDes
   }
   protected _selectable: boolean = true;
 
+  /** Whether the chip is disabled. */
+  @Input()
+  get disabled(): boolean { return this._chipListDisabled || this._disabled; }
+  set disabled(value: boolean) {
+    this._disabled = coerceBooleanProperty(value);
+  }
+  protected _disabled: boolean = false;
+
   /**
    * Determines whether or not the chip displays the remove styling and emits (removed) events.
    */

tools/public_api_guard/material/chips.d.ts

@@ -1,8 +1,10 @@
 export declare const MAT_CHIPS_DEFAULT_OPTIONS: InjectionToken<MatChipsDefaultOptions>;
 
-export declare class MatChip extends _MatChipMixinBase implements FocusableOption, OnDestroy, CanColor, CanDisable, CanDisableRipple, RippleTarget, HasTabIndex {
+export declare class MatChip extends _MatChipMixinBase implements FocusableOption, OnDestroy, CanColor, CanDisableRipple, RippleTarget, HasTabIndex {
     _animationsDisabled: boolean;
+    _chipListDisabled: boolean;
     _chipListMultiple: boolean;
+    protected _disabled: boolean;
     _elementRef: ElementRef<HTMLElement>;
     _hasFocus: boolean;
     readonly _onBlur: Subject<MatChipEvent>;
@@ -15,6 +17,8 @@ export declare class MatChip extends _MatChipMixinBase implements FocusableOptio
     avatar: MatChipAvatar;
     chipListSelectable: boolean;
     readonly destroyed: EventEmitter<MatChipEvent>;
+    get disabled(): boolean;
+    set disabled(value: boolean);
     get removable(): boolean;
     set removable(value: boolean);
     removeIcon: MatChipRemove;
@@ -46,7 +50,7 @@ export declare class MatChip extends _MatChipMixinBase implements FocusableOptio
     static ngAcceptInputType_removable: BooleanInput;
     static ngAcceptInputType_selectable: BooleanInput;
     static ngAcceptInputType_selected: BooleanInput;
-    static ɵdir: i0.ɵɵDirectiveDefWithMeta<MatChip, "mat-basic-chip, [mat-basic-chip], mat-chip, [mat-chip]", ["matChip"], { "color": "color"; "disabled": "disabled"; "disableRipple": "disableRipple"; "tabIndex": "tabIndex"; "selected": "selected"; "value": "value"; "selectable": "selectable"; "removable": "removable"; }, { "selectionChange": "selectionChange"; "destroyed": "destroyed"; "removed": "removed"; }, ["avatar", "trailingIcon", "removeIcon"]>;
+    static ɵdir: i0.ɵɵDirectiveDefWithMeta<MatChip, "mat-basic-chip, [mat-basic-chip], mat-chip, [mat-chip]", ["matChip"], { "color": "color"; "disableRipple": "disableRipple"; "tabIndex": "tabIndex"; "selected": "selected"; "value": "value"; "selectable": "selectable"; "disabled": "disabled"; "removable": "removable"; }, { "selectionChange": "selectionChange"; "destroyed": "destroyed"; "removed": "removed"; }, ["avatar", "trailingIcon", "removeIcon"]>;
     static ɵfac: i0.ɵɵFactoryDef<MatChip, [null, null, null, { optional: true; }, { optional: true; }, null, { attribute: "tabindex"; }, { optional: true; }]>;
 }