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MOBILE-3833 tabs: Remove MAX_HEIGHT_TO_HIDE_TABS and scroll hide

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This commit is contained in:
Pau Ferrer Ocaña 2022-03-30 16:14:30 +02:00
parent 0336ab0808
commit f56cfa3ab6
4 changed files with 1 additions and 178 deletions
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158
src/core/classes/tabs.ts
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@ -26,7 +26,7 @@ import {
SimpleChange,
} from '@angular/core';
import { IonSlides } from '@ionic/angular';
import { BackButtonEvent, ScrollDetail } from '@ionic/core';
import { BackButtonEvent } from '@ionic/core';
import { Subscription } from 'rxjs';
import { Platform, Translate } from '@singletons';
@ -45,9 +45,6 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
// Minimum tab's width.
protected static readonly MIN_TAB_WIDTH = 107;
// @todo [4.0]
// Max height that allows tab hiding. WARNING: Hide tabs on scroll disabled. If confirmed, remove the associated code.
protected static readonly MAX_HEIGHT_TO_HIDE_TABS = 0;
@Input() selectedIndex = 0; // Index of the tab to select.
@Input() hideUntil = false; // Determine when should the contents be shown.
@ -73,10 +70,6 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
protected initialized = false;
protected afterViewInitTriggered = false;
protected tabBarHeight = 0;
protected tabsElement?: HTMLElement; // The tabs parent element. It's the element that will be "scrolled" to hide tabs.
protected tabBarElement?: HTMLIonTabBarElement; // The top tab bar element.
protected tabsShown = true;
protected resizeListener?: CoreEventObserver;
protected isDestroyed = false;
protected isCurrentView = true;
@ -91,9 +84,6 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
protected isInTransition = false; // Wether Slides is in transition.
protected slidesSwiper: any; // eslint-disable-line @typescript-eslint/no-explicit-any
protected slidesSwiperLoaded = false;
protected scrollElements: Record<string | number, HTMLElement> = {}; // Scroll elements for each loaded tab.
protected lastScroll = 0;
protected previousLastScroll = 0;
tabAction: CoreTabsRoleTab<T>;
@ -128,7 +118,6 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
}
this.afterViewInitTriggered = true;
this.tabBarElement = this.element.nativeElement.querySelector('ion-tab-bar');
if (!this.initialized && this.hideUntil) {
// Tabs should be shown, initialize them.
@ -140,49 +129,6 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
});
}
/**
* Calculate the tab bar height.
*/
protected calculateTabBarHeight(): void {
if (!this.tabBarElement) {
return;
}
this.tabBarHeight = this.tabBarElement.offsetHeight;
this.applyScroll(this.tabsShown, this.lastScroll);
}
/**
* Apply scroll to hiding tabs.
*
* @param showTabs Show or completely hide tabs.
* @param scroll Scroll position.
*/
protected applyScroll(showTabs: boolean, scroll?: number): void {
if (!this.tabBarElement || !this.tabBarHeight) {
return;
}
if (showTabs) {
// Smooth translation.
this.tabBarElement.classList.remove('tabs-hidden');
if (scroll === 0) {
this.tabBarElement.style.height = '';
this.previousLastScroll = this.lastScroll;
this.lastScroll = 0;
} else if (scroll !== undefined) {
this.tabBarElement.style.height = (this.tabBarHeight - scroll) + 'px';
}
} else {
this.tabBarElement.classList.add('tabs-hidden');
this.tabBarElement.style.height = '';
}
this.tabsShown = showTabs;
}
/**
* @inheritdoc
*/
@ -260,15 +206,6 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
return;
}
if (window.innerHeight >= CoreTabsBaseComponent.MAX_HEIGHT_TO_HIDE_TABS) {
// Ensure tabbar is shown.
this.applyScroll(true, 0);
this.calculateTabBarHeight();
} else if (!this.tabsShown) {
// Don't recalculate.
return;
}
await this.calculateMaxSlides();
await this.updateSlides();
@ -314,9 +251,6 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
this.firstSelectedTab = selectedTab.id!;
this.selectTab(this.firstSelectedTab);
// Setup tab scrolling.
this.calculateTabBarHeight();
this.initialized = true;
// Check which arrows should be shown.
@ -374,8 +308,6 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
this.slideChanged();
this.calculateTabBarHeight();
// @todo: This call to update() can trigger JS errors in the console if tabs are re-loaded and there's only 1 tab.
// For some reason, swiper.slides is undefined inside the Slides class, and the swiper is marked as destroyed.
// Changing *ngIf="hideUntil" to [hidden] doesn't solve the issue, and it causes another error to be raised.
@ -484,61 +416,6 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
}
}
/**
* Show or hide the tabs. This is used when the user is scrolling inside a tab.
*
* @param scrollTop Scroll top.
* @param scrollElement Content scroll element to check measures.
*/
showHideTabs(scrollTop: number, scrollElement: HTMLElement): void {
if (!this.tabBarElement || !this.tabsElement || !scrollElement) {
return;
}
// Always show on very tall screens.
if (window.innerHeight >= CoreTabsBaseComponent.MAX_HEIGHT_TO_HIDE_TABS) {
return;
}
if (!this.tabBarHeight && this.tabBarElement.offsetHeight != this.tabBarHeight) {
// Wrong tab height, recalculate it.
this.calculateTabBarHeight();
}
if (!this.tabBarHeight) {
// We don't have the tab bar height, this means the tab bar isn't shown.
return;
}
if (scrollTop <= 0) {
// Ensure tabbar is shown.
this.applyScroll(true, 0);
return;
}
if (scrollTop == this.lastScroll || scrollTop == this.previousLastScroll) {
// Ensure scroll has been modified to avoid flicks.
return;
}
if (this.tabsShown && scrollTop > this.tabBarHeight) {
// Hide tabs.
this.applyScroll(false);
} else if (!this.tabsShown && scrollTop <= this.tabBarHeight) {
this.applyScroll(true);
}
if (this.tabsShown && scrollElement.scrollHeight > scrollElement.clientHeight + (this.tabBarHeight - scrollTop)) {
// Smooth translation.
this.applyScroll(true, scrollTop);
}
// Use lastScroll after moving the tabs to avoid flickering.
this.previousLastScroll = this.lastScroll;
this.lastScroll = scrollTop;
}
/**
* Select a tab by ID.
*
@ -626,39 +503,6 @@ export class CoreTabsBaseComponent<T extends CoreTabBase> implements OnInit, Aft
return true;
}
/**
* Listen scroll events in an element's inner ion-content (if any).
*
* @param element Element to search ion-content in.
* @param id ID of the tab/page.
* @return Promise resolved when done.
*/
async listenContentScroll(element: HTMLElement, id: number | string): Promise<void> {
if (this.scrollElements[id]) {
return; // Already set.
}
let content = element.querySelector('ion-content');
if (!content) {
return;
}
// Search the inner ion-content if there's more than one.
let childContent = content.querySelector('ion-content') || null;
while (childContent != null) {
content = childContent;
childContent = content.querySelector('ion-content') || null;
}
const scroll = await content.getScrollElement();
content.scrollEvents = true;
this.scrollElements[id] = scroll;
content.addEventListener('ionScroll', (e: CustomEvent<ScrollDetail>): void => {
this.showHideTabs(e.detail.scrollTop, scroll);
});
}
/**
* Adapt tabs to a window resize.
*/

9
src/core/components/tabs-outlet/tabs-outlet.ts
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@ -97,7 +97,6 @@ export class CoreTabsOutletComponent extends CoreTabsBaseComponent<CoreTabsOutle
return;
}
this.tabsElement = this.element.nativeElement.querySelector('ion-tabs');
this.stackEventsSubscription = this.ionTabs.outlet.stackEvents.subscribe(async (stackEvent: StackEvent) => {
if (!this.isCurrentView) {
return;
@ -118,14 +117,6 @@ export class CoreTabsOutletComponent extends CoreTabsBaseComponent<CoreTabsOutle
}
this.showHideNavBarButtons(stackEvent.enteringView.element.tagName);
await this.listenContentScroll(stackEvent.enteringView.element, stackEvent.enteringView.id);
const scrollElement = this.scrollElements[stackEvent.enteringView.id];
if (scrollElement) {
// Show or hide tabs based on the new page scroll.
this.showHideTabs(scrollElement.scrollTop, scrollElement);
}
});
this.outletActivatedSubscription = this.ionTabs.outlet.activateEvents.subscribe(() => {
this.lastActiveComponent = this.ionTabs.outlet.component;

3
src/core/components/tabs/tab.ts
View File

@ -120,9 +120,6 @@ export class CoreTabComponent implements OnInit, OnDestroy, CoreTabBase {
this.loaded = true;
this.ionSelect.emit(this);
this.showHideNavBarButtons(true);
// Setup tab scrolling.
this.tabs.listenContentScroll(this.element, this.id!);
}
/**

9
src/core/components/tabs/tabs.ts
View File

@ -67,7 +67,6 @@ export class CoreTabsComponent extends CoreTabsBaseComponent<CoreTabComponent> i
return;
}
this.tabsElement = this.element.nativeElement;
this.originalTabsContainer = this.originalTabsRef?.nativeElement;
}
@ -92,14 +91,6 @@ export class CoreTabsComponent extends CoreTabsBaseComponent<CoreTabComponent> i
setTimeout(() => {
this.calculateSlides();
});
if (this.initialized && this.tabs.length > 1 && this.tabBarHeight == 0) {
// Calculate the tabBarHeight again now that there is more than 1 tab and the bar will be seen.
// Use timeout to wait for the view to be rendered. 0 ms should be enough, use 50 to be sure.
setTimeout(() => {
this.calculateTabBarHeight();
}, 50);
}
}
}