fix(popover): position MD popover on top of element clicked

fixes #6683

demos/popover/index.ts

@@ -4,7 +4,7 @@ import {App, Page, Popover, NavController, Content, NavParams} from 'ionic-angul
 
 @Page({
   template: `
-    <ion-list radio-group [(ngModel)]="fontFamily" (change)="changeFontFamily()">
+    <ion-list radio-group [(ngModel)]="fontFamily" (ionChange)="changeFontFamily()">
       <ion-row>
         <ion-col>
           <button (click)="changeFontSize('smaller')" ion-item detail-none class="text-button text-smaller">A</button>

src/components/popover/popover.ts

@@ -10,7 +10,8 @@ import {isPresent, isUndefined, isDefined} from '../../util/util';
 import {nativeRaf, CSS} from '../../util/dom';
 import {ViewController} from '../nav/view-controller';
 
-const POPOVER_BODY_PADDING = 2;
+const POPOVER_IOS_BODY_PADDING = 2;
+const POPOVER_MD_BODY_PADDING = 12;
 
 /**
  * @name Popover
@@ -240,8 +241,7 @@ class PopoverTransition extends Transition {
     super(opts);
   }
 
-
-  positionView(nativeEle: HTMLElement, ev) {
+  mdPositionView(nativeEle: HTMLElement, ev) {
     let originY = 'top';
     let originX = 'left';
 
@@ -257,19 +257,73 @@ class PopoverTransition extends Transition {
     let bodyWidth = window.innerWidth;
     let bodyHeight = window.innerHeight;
 
-    let targetTop = (bodyHeight / 2) - (popoverHeight / 2);
-    let targetLeft = bodyWidth / 2;
-    let targetWidth = 0;
-    let targetHeight = 0;
+    // If ev was passed, use that for target element
+    let targetDim = ev && ev.target && ev.target.getBoundingClientRect();
+
+    let targetTop = targetDim && targetDim.top || (bodyHeight / 2) - (popoverHeight / 2);
+    let targetLeft = targetDim && targetDim.left || bodyWidth / 2 - (popoverWidth / 2);
+    let targetWidth = targetDim && targetDim.width || 0;
+    let targetHeight = targetDim && targetDim.height || 0;
+
+    let popoverCSS = {
+      top: targetTop,
+      left: targetLeft
+    };
+
+    // If the popover left is less than the padding it is off screen
+    // to the left so adjust it, else if the width of the popover
+    // exceeds the body width it is off screen to the right so adjust
+    if (popoverCSS.left < POPOVER_MD_BODY_PADDING) {
+      popoverCSS.left = POPOVER_MD_BODY_PADDING;
+    } else if (popoverWidth + POPOVER_MD_BODY_PADDING + popoverCSS.left > bodyWidth) {
+      popoverCSS.left = bodyWidth - popoverWidth - POPOVER_MD_BODY_PADDING;
+      originX = 'right';
+    }
+
+    // If the popover when popped down stretches past bottom of screen,
+    // make it pop up if there's room above
+    if (targetTop + targetHeight + popoverHeight > bodyHeight && targetTop - popoverHeight > 0) {
+      popoverCSS.top = targetTop - popoverHeight;
+      nativeEle.className = nativeEle.className + ' popover-bottom';
+      originY = 'bottom';
+    // If there isn't room for it to pop up above the target cut it off
+    } else if (targetTop + targetHeight + popoverHeight > bodyHeight) {
+      popoverEle.style.bottom = POPOVER_MD_BODY_PADDING + 'px';
+    }
+
+    popoverEle.style.top = popoverCSS.top + 'px';
+    popoverEle.style.left = popoverCSS.left + 'px';
+
+    popoverEle.style[CSS.transformOrigin] = originY + ' ' + originX;
+
+    // Since the transition starts before styling is done we
+    // want to wait for the styles to apply before showing the wrapper
+    popoverWrapperEle.style.opacity = '1';
+  }
+
+  iosPositionView(nativeEle: HTMLElement, ev) {
+    let originY = 'top';
+    let originX = 'left';
+
+    let popoverWrapperEle = <HTMLElement>nativeEle.querySelector('.popover-wrapper');
+
+    // Popover content width and height
+    let popoverEle = <HTMLElement>nativeEle.querySelector('.popover-content');
+    let popoverDim = popoverEle.getBoundingClientRect();
+    let popoverWidth = popoverDim.width;
+    let popoverHeight = popoverDim.height;
+
+    // Window body width and height
+    let bodyWidth = window.innerWidth;
+    let bodyHeight = window.innerHeight;
 
     // If ev was passed, use that for target element
-    if (ev && ev.target) {
-      let targetDim = ev.target.getBoundingClientRect();
-      targetTop = targetDim.top;
-      targetLeft = targetDim.left;
-      targetWidth = targetDim.width;
-      targetHeight = targetDim.height;
-    }
+    let targetDim = ev && ev.target && ev.target.getBoundingClientRect();
+
+    let targetTop = targetDim && targetDim.top || (bodyHeight / 2) - (popoverHeight / 2);
+    let targetLeft = targetDim && targetDim.left || bodyWidth / 2;
+    let targetWidth = targetDim && targetDim.width || 0;
+    let targetHeight = targetDim && targetDim.height || 0;
 
     // The arrow that shows above the popover on iOS
     var arrowEle = <HTMLElement>nativeEle.querySelector('.popover-arrow');
@@ -290,10 +344,10 @@ class PopoverTransition extends Transition {
     // If the popover left is less than the padding it is off screen
     // to the left so adjust it, else if the width of the popover
     // exceeds the body width it is off screen to the right so adjust
-    if (popoverCSS.left < POPOVER_BODY_PADDING) {
-      popoverCSS.left = POPOVER_BODY_PADDING;
-    } else if (popoverWidth + POPOVER_BODY_PADDING + popoverCSS.left > bodyWidth) {
-      popoverCSS.left = bodyWidth - popoverWidth - POPOVER_BODY_PADDING;
+    if (popoverCSS.left < POPOVER_IOS_BODY_PADDING) {
+      popoverCSS.left = POPOVER_IOS_BODY_PADDING;
+    } else if (popoverWidth + POPOVER_IOS_BODY_PADDING + popoverCSS.left > bodyWidth) {
+      popoverCSS.left = bodyWidth - popoverWidth - POPOVER_IOS_BODY_PADDING;
       originX = 'right';
     }
 
@@ -306,7 +360,7 @@ class PopoverTransition extends Transition {
       originY = 'bottom';
     // If there isn't room for it to pop up above the target cut it off
     } else if (targetTop + targetHeight + popoverHeight > bodyHeight) {
-      popoverEle.style.bottom = POPOVER_BODY_PADDING + '%';
+      popoverEle.style.bottom = POPOVER_IOS_BODY_PADDING + '%';
     }
 
     arrowEle.style.top = arrowCSS.top + 'px';
@@ -344,7 +398,7 @@ class PopoverPopIn extends PopoverTransition {
 
   play() {
     nativeRaf(() => {
-      this.positionView(this.enteringView.pageRef().nativeElement, this.opts.ev);
+      this.iosPositionView(this.enteringView.pageRef().nativeElement, this.opts.ev);
       super.play();
     });
   }
@@ -394,7 +448,7 @@ class PopoverMdPopIn extends PopoverTransition {
 
   play() {
     nativeRaf(() => {
-      this.positionView(this.enteringView.pageRef().nativeElement, this.opts.ev);
+      this.mdPositionView(this.enteringView.pageRef().nativeElement, this.opts.ev);
       super.play();
     });
   }

src/components/popover/test/basic/index.ts

@@ -4,7 +4,7 @@ import {App, Page, Popover, NavController, Content, NavParams, ViewController} f
 
 @Page({
   template: `
-    <ion-list radio-group [(ngModel)]="fontFamily" (change)="changeFontFamily()">
+    <ion-list radio-group [(ngModel)]="fontFamily" (ionChange)="changeFontFamily()">
       <ion-row>
         <ion-col>
           <button (click)="changeFontSize('smaller')" ion-item detail-none class="text-button text-smaller">A</button>

src/components/popover/test/basic/main.html

@@ -19,6 +19,11 @@
 </ion-navbar>
 
 <ion-content #popoverContent padding>
+  <ion-list>
+    <button ion-item (click)="presentListPopover($event)">
+      Present List Popover
+    </button>
+  </ion-list>
 
   <button block (click)="presentListPopover($event)" class="e2eOpenListPopover">
     Present List Popover