Move CanDisable mixin to MdExpansionPanel.

Author: josephperrott

src/lib/expansion/accordion-item.ts

@@ -17,32 +17,26 @@ import {
 } from '@angular/core';
 import {UniqueSelectionDispatcher} from '../core';
 import {CdkAccordion} from './accordion';
-import {mixinDisabled, CanDisable} from '../core/common-behaviors/disabled';
 
 /** Used to generate unique ID for each expansion panel. */
 let nextId = 0;
 
-// Boilerplate for applying mixins to MdSlider.
-/** @docs-private */
-export class AccordionItemBase { }
-export const _AccordionItemMixinBase = mixinDisabled(AccordionItemBase);
-
 /**
  * An abstract class to be extended and decorated as a component.  Sets up all
  * events and attributes needed to be managed by a CdkAccordion parent.
  */
 @Injectable()
-export class AccordionItem extends _AccordionItemMixinBase implements OnDestroy, CanDisable {
-  /** Event emitted every time the MdAccordionChild is closed. */
+export class AccordionItem implements OnDestroy {
+  /** Event emitted every time the AccordionItem is closed. */
   @Output() closed = new EventEmitter<void>();
-  /** Event emitted every time the MdAccordionChild is opened. */
+  /** Event emitted every time the AccordionItem is opened. */
   @Output() opened = new EventEmitter<void>();
-  /** Event emitted when the MdAccordionChild is destroyed. */
+  /** Event emitted when the AccordionItem is destroyed. */
   @Output() destroyed = new EventEmitter<void>();
-  /** The unique MdAccordionChild id. */
+  /** The unique AccordionItem id. */
   readonly id = `cdk-accordion-child-${nextId++}`;
 
-  /** Whether the MdAccordionChild is expanded. */
+  /** Whether the AccordionItem is expanded. */
   @Input()
   get expanded(): boolean { return this._expanded; }
   set expanded(expanded: boolean) {
@@ -74,9 +68,6 @@ export class AccordionItem extends _AccordionItemMixinBase implements OnDestroy,
   constructor(@Optional() public accordion: CdkAccordion,
               private _changeDetectorRef: ChangeDetectorRef,
               protected _expansionDispatcher: UniqueSelectionDispatcher) {
-
-    super();
-
     this._removeUniqueSelectionListener =
       _expansionDispatcher.listen((id: string, accordionId: string) => {
         if (this.accordion && !this.accordion.multi &&

src/lib/expansion/expansion-panel.ts

@@ -30,8 +30,19 @@ import {
 import {MdAccordion} from './accordion';
 import {AccordionItem} from './accordion-item';
 import {UniqueSelectionDispatcher} from '../core';
+import {mixinDisabled, CanDisable} from '../core/common-behaviors/disabled';
 import {Subject} from 'rxjs/Subject';
 
+// Boilerplate for applying mixins to MdExpansionPanel.
+/** @docs-private */
+export class MdExpansionPanelBase extends AccordionItem {
+  constructor(accordion: MdAccordion,
+              _changeDetectorRef: ChangeDetectorRef,
+              _uniqueSelectionDispatcher: UniqueSelectionDispatcher) {
+    super(accordion, _changeDetectorRef, _uniqueSelectionDispatcher);
+  }
+}
+export const _MdExpansionPanelMixinBase = mixinDisabled(MdExpansionPanelBase);
 
 /** MdExpansionPanel's states. */
 export type MdExpansionPanelState = 'expanded' | 'collapsed';
@@ -71,7 +82,8 @@ export const EXPANSION_PANEL_ANIMATION_TIMING = '225ms cubic-bezier(0.4,0.0,0.2,
     ]),
   ],
 })
-export class MdExpansionPanel extends AccordionItem implements OnChanges, OnDestroy {
+export class MdExpansionPanel extends _MdExpansionPanelMixinBase
+    implements CanDisable, OnChanges, OnDestroy {
   /** Whether the toggle indicator should be hidden. */
   @Input() hideToggle: boolean = false;
 
@@ -98,7 +110,6 @@ export class MdExpansionPanel extends AccordionItem implements OnChanges, OnDest
     if (this.accordion) {
       return (this.expanded ? this.accordion.displayMode : this._getExpandedState()) === 'default';
     }
-
     return false;
   }