feat(menu): align with 2018 material design spec

Aligns the menu component with the latest version of the Material design spec. Includes making `overlapTrigger` false by default.

Author: crisbeto

src/demo-app/menu/menu-demo.html

@@ -137,31 +137,31 @@
 
 <div class="demo-menu">
   <div class="demo-menu-section">
-    <p>overlapTrigger: false</p>
+    <p>overlapTrigger: true</p>
 
     <mat-toolbar>
       <button mat-icon-button [mat-menu-trigger-for]="menuOverlay">
         <mat-icon>more_vert</mat-icon>
       </button>
     </mat-toolbar>
 
-    <mat-menu [overlapTrigger]="false" #menuOverlay="matMenu">
+    <mat-menu [overlapTrigger]="true" #menuOverlay="matMenu">
       <button mat-menu-item *ngFor="let item of items" [disabled]="item.disabled">
         {{ item.text }}
       </button>
     </mat-menu>
   </div>
   <div class="demo-menu-section">
     <p>
-      Position x: before, overlapTrigger: false
+      Position x: before, overlapTrigger: true
     </p>
     <mat-toolbar class="demo-end-icon">
       <button mat-icon-button [mat-menu-trigger-for]="posXMenuOverlay">
         <mat-icon>more_vert</mat-icon>
       </button>
     </mat-toolbar>
 
-    <mat-menu xPosition="before" [overlapTrigger]="false" #posXMenuOverlay="matMenu">
+    <mat-menu xPosition="before" [overlapTrigger]="true" #posXMenuOverlay="matMenu">
       <button mat-menu-item *ngFor="let item of iconItems" [disabled]="item.disabled">
         <mat-icon>{{ item.icon }}</mat-icon>
         {{ item.text }}
@@ -170,15 +170,15 @@
   </div>
   <div class="demo-menu-section">
     <p>
-      Position y: above, overlapTrigger: false
+      Position y: above, overlapTrigger: true
     </p>
     <mat-toolbar>
       <button mat-icon-button [mat-menu-trigger-for]="posYMenuOverlay">
         <mat-icon>more_vert</mat-icon>
       </button>
     </mat-toolbar>
 
-    <mat-menu yPosition="above" [overlapTrigger]="false" #posYMenuOverlay="matMenu">
+    <mat-menu yPosition="above" [overlapTrigger]="true" #posYMenuOverlay="matMenu">
       <button mat-menu-item *ngFor="let item of items" [disabled]="item.disabled">
         {{ item.text }}
       </button>

src/lib/menu/_menu-theme.scss

@@ -40,9 +40,9 @@
 @mixin mat-menu-typography($config) {
   .mat-menu-item {
     font: {
-      family: mat-font-family($config, subheading-2);
-      size: mat-font-size($config, subheading-2);
-      weight: mat-font-weight($config, subheading-2);
+      family: mat-font-family($config, body-1);
+      size: mat-font-size($config, body-1);
+      weight: mat-font-weight($config, body-1);
     }
   }
 }

src/lib/menu/menu-animations.ts

@@ -14,7 +14,6 @@ import{
   transition,
   query,
   group,
-  sequence,
   AnimationTriggerMetadata,
 } from '@angular/animations';
 
@@ -38,21 +37,13 @@ export const matMenuAnimations: {
   transformMenu: trigger('transformMenu', [
     state('void', style({
       opacity: 0,
-      // This starts off from 0.01, instead of 0, because there's an issue in the Angular animations
-      // as of 4.2, which causes the animation to be skipped if it starts from 0.
-      transform: 'scale(0.01, 0.01)'
+      transform: 'scale(0.8)'
     })),
-    transition('void => enter', sequence([
-      query('.mat-menu-content', style({opacity: 0})),
-      animate('100ms linear', style({opacity: 1, transform: 'scale(1, 0.5)'})),
-      group([
-        query('.mat-menu-content', animate('400ms cubic-bezier(0.55, 0, 0.55, 0.2)',
-          style({opacity: 1})
-        )),
-        animate('300ms cubic-bezier(0.25, 0.8, 0.25, 1)', style({transform: 'scale(1, 1)'})),
-      ])
+    transition('void => enter', group([
+      query('.mat-menu-content', animate('100ms linear', style({opacity: 1}))),
+      animate('120ms cubic-bezier(0, 0, 0.2, 1)', style({transform: 'scale(1)'})),
     ])),
-    transition('* => void', animate('150ms 50ms linear', style({opacity: 0})))
+    transition('* => void', animate('100ms 25ms linear', style({opacity: 0})))
   ]),
 
 

src/lib/menu/menu-directive.ts

@@ -69,7 +69,7 @@ export const MAT_MENU_DEFAULT_OPTIONS =
 /** @docs-private */
 export function MAT_MENU_DEFAULT_OPTIONS_FACTORY(): MatMenuDefaultOptions {
   return {
-    overlapTrigger: true,
+    overlapTrigger: false,
     xPosition: 'after',
     yPosition: 'below',
     backdropClass: 'cdk-overlay-transparent-backdrop',
@@ -79,7 +79,7 @@ export function MAT_MENU_DEFAULT_OPTIONS_FACTORY(): MatMenuDefaultOptions {
  * Start elevation for the menu panel.
  * @docs-private
  */
-const MAT_MENU_BASE_ELEVATION = 2;
+const MAT_MENU_BASE_ELEVATION = 4;
 
 
 @Component({

src/lib/menu/menu.scss

@@ -5,11 +5,11 @@
 @import '../../cdk/a11y/a11y';
 
 $mat-menu-vertical-padding: 8px !default;
-$mat-menu-border-radius: 2px !default;
+$mat-menu-border-radius: 4px !default;
 $mat-menu-submenu-indicator-size: 10px !default;
 
 .mat-menu-panel {
-  @include mat-menu-base(2);
+  @include mat-menu-base(4);
   max-height: calc(100vh - #{$mat-menu-item-height});
   border-radius: $mat-menu-border-radius;
   outline: 0;

src/lib/menu/menu.spec.ts

@@ -612,7 +612,7 @@ describe('MatMenu', () => {
       let panel = overlayContainerElement.querySelector('.mat-menu-panel') as HTMLElement;
 
       expect(Math.floor(panel.getBoundingClientRect().bottom))
-          .toBe(Math.floor(trigger.getBoundingClientRect().bottom), 'Expected menu to open above');
+          .toBe(Math.floor(trigger.getBoundingClientRect().top), 'Expected menu to open above');
 
       fixture.componentInstance.trigger.closeMenu();
       fixture.detectChanges();
@@ -625,7 +625,7 @@ describe('MatMenu', () => {
       panel = overlayContainerElement.querySelector('.mat-menu-panel') as HTMLElement;
 
       expect(Math.floor(panel.getBoundingClientRect().top))
-          .toBe(Math.floor(trigger.getBoundingClientRect().top), 'Expected menu to open below');
+          .toBe(Math.floor(trigger.getBoundingClientRect().bottom), 'Expected menu to open below');
     });
 
   });
@@ -658,7 +658,7 @@ describe('MatMenu', () => {
 
       // The y-position of the overlay should be unaffected, as it can already fit vertically
       expect(Math.floor(overlayRect.top))
-          .toBe(Math.floor(triggerRect.top),
+          .toBe(Math.floor(triggerRect.bottom),
               `Expected menu top position to be unchanged if it can fit in the viewport.`);
     });
 
@@ -678,11 +678,8 @@ describe('MatMenu', () => {
       const triggerRect = trigger.getBoundingClientRect();
       const overlayRect = overlayPane.getBoundingClientRect();
 
-      // In "above" position, the bottom edges of the overlay and the origin are aligned.
-      // To find the overlay top, subtract the menu height from the origin's bottom edge.
-      const expectedTop = triggerRect.bottom - overlayRect.height;
-      expect(Math.floor(overlayRect.top))
-          .toBe(Math.floor(expectedTop),
+      expect(Math.floor(overlayRect.bottom))
+          .toBe(Math.floor(triggerRect.top),
               `Expected menu to open in "above" position if "below" position wouldn't fit.`);
 
       // The x-position of the overlay should be unaffected, as it can already fit horizontally
@@ -709,14 +706,13 @@ describe('MatMenu', () => {
       const overlayRect = overlayPane.getBoundingClientRect();
 
       const expectedLeft = triggerRect.right - overlayRect.width;
-      const expectedTop = triggerRect.bottom - overlayRect.height;
 
       expect(Math.floor(overlayRect.left))
           .toBe(Math.floor(expectedLeft),
               `Expected menu to open in "before" position if "after" position wouldn't fit.`);
 
-      expect(Math.floor(overlayRect.top))
-          .toBe(Math.floor(expectedTop),
+      expect(Math.floor(overlayRect.bottom))
+          .toBe(Math.floor(triggerRect.top),
               `Expected menu to open in "above" position if "below" position wouldn't fit.`);
     });
 
@@ -740,7 +736,7 @@ describe('MatMenu', () => {
       // As designated "above" position won't fit on screen, the menu should fall back
       // to "below" mode, where the top edges of the overlay and trigger are aligned.
       expect(Math.floor(overlayRect.top))
-          .toBe(Math.floor(triggerRect.top),
+          .toBe(Math.floor(triggerRect.bottom),
               `Expected menu to open in "below" position if "above" position wouldn't fit.`);
     });
 
@@ -1403,11 +1399,11 @@ describe('MatMenu', () => {
       const menus = overlay.querySelectorAll('.mat-menu-panel');
 
       expect(menus[0].classList)
-          .toContain('mat-elevation-z2', 'Expected root menu to have base elevation.');
+          .toContain('mat-elevation-z4', 'Expected root menu to have base elevation.');
       expect(menus[1].classList)
-          .toContain('mat-elevation-z3', 'Expected first sub-menu to have base elevation + 1.');
+          .toContain('mat-elevation-z5', 'Expected first sub-menu to have base elevation + 1.');
       expect(menus[2].classList)
-          .toContain('mat-elevation-z4', 'Expected second sub-menu to have base elevation + 2.');
+          .toContain('mat-elevation-z6', 'Expected second sub-menu to have base elevation + 2.');
     });
 
     it('should update the elevation when the same menu is opened at a different depth',
@@ -1425,7 +1421,7 @@ describe('MatMenu', () => {
         let lastMenu = overlay.querySelectorAll('.mat-menu-panel')[2];
 
         expect(lastMenu.classList)
-            .toContain('mat-elevation-z4', 'Expected menu to have the base elevation plus two.');
+            .toContain('mat-elevation-z6', 'Expected menu to have the base elevation plus two.');
 
         (overlay.querySelector('.cdk-overlay-backdrop')! as HTMLElement).click();
         fixture.detectChanges();
@@ -1441,9 +1437,9 @@ describe('MatMenu', () => {
         lastMenu = overlay.querySelector('.mat-menu-panel') as HTMLElement;
 
         expect(lastMenu.classList)
-            .not.toContain('mat-elevation-z4', 'Expected menu not to maintain old elevation.');
+            .not.toContain('mat-elevation-z6', 'Expected menu not to maintain old elevation.');
         expect(lastMenu.classList)
-            .toContain('mat-elevation-z2', 'Expected menu to have the proper updated elevation.');
+            .toContain('mat-elevation-z4', 'Expected menu to have the proper updated elevation.');
       }));
 
     it('should not increase the elevation if the user specified a custom one', () => {
@@ -1666,7 +1662,7 @@ describe('MatMenu default overrides', () => {
       declarations: [SimpleMenu, FakeIcon],
       providers: [{
         provide: MAT_MENU_DEFAULT_OPTIONS,
-        useValue: {overlapTrigger: false, xPosition: 'before', yPosition: 'above'},
+        useValue: {overlapTrigger: true, xPosition: 'before', yPosition: 'above'},
       }],
     }).compileComponents();
   }));
@@ -1676,7 +1672,7 @@ describe('MatMenu default overrides', () => {
     fixture.detectChanges();
     const menu = fixture.componentInstance.menu;
 
-    expect(menu.overlapTrigger).toBe(false);
+    expect(menu.overlapTrigger).toBe(true);
     expect(menu.xPosition).toBe('before');
     expect(menu.yPosition).toBe('above');
   });