carbon-components-angular
Version:
Next generation components
316 lines • 41.2 kB
JavaScript
import { Component, ContentChildren, EventEmitter, HostBinding, HostListener, Input, Output, ViewChild } from "@angular/core";
import { Subscription } from "rxjs";
import { BaseTabHeader } from "./base-tab-header.component";
import { TabHeaderBase } from "./tab-header.directive";
import * as i0 from "@angular/core";
import * as i1 from "carbon-components-angular/utils";
import * as i2 from "carbon-components-angular/i18n";
import * as i3 from "@angular/common";
const VERTICAL_TAB_HEIGHT = 64;
/**
* Vertical tab header group: same children as `cds-tab-header-group`, with
* up/down (and Home/End) keys, gradient overflow, and always-contained type.
*
*
* ```html
* <cds-tabs-vertical-grouped height="400px">
* <cds-tab-header-group-vertical>
* <cds-tab-header [paneReference]="a">A</cds-tab-header>
* <cds-tab-header [paneReference]="b">B</cds-tab-header>
* </cds-tab-header-group-vertical>
* <cds-tab #a>...</cds-tab>
* <cds-tab #b>...</cds-tab>
* </cds-tabs-vertical-grouped>
* ```
*/
export class TabHeaderGroupVertical extends BaseTabHeader {
constructor(elementRef, changeDetectorRef, eventService, renderer, i18n) {
super(elementRef, changeDetectorRef, eventService, renderer);
this.elementRef = elementRef;
this.changeDetectorRef = changeDetectorRef;
this.eventService = eventService;
this.renderer = renderer;
this.i18n = i18n;
/**
* i18n strings for the tab list `aria-label` fallback.
*/
this.translations = this.i18n.get().TABS;
/**
* When `true`, sets each tab panel `tabindex` to `-1` for navigation-style usage.
*/
this.isNavigation = false;
/**
* Fires with tab index when a close control is used (with `dismissable`).
*/
this.tabClose = new EventEmitter();
/**
* Set to 'true' to have tabs automatically activated and have their content displayed when they receive focus.
*/
this.followFocus = true;
this.verticalClass = true;
/**
* Index of the selected tab for keyboard logic
*/
this.currentSelectedTab = 0;
/**
* Focused tab index when `followFocus` is false (manual activation).
*/
this.activeIndex = null;
this.isOverflowingTop = false;
this.isOverflowingBottom = false;
this.selectedSubscriptionTracker = new Subscription();
this.closeSubscriptionTracker = new Subscription();
this.resizeObserver = null;
this.type = "contained";
// Cache a stable reference for add/removeEventListener.
this.boundListScrollHandler = () => this.updateOverflowState();
}
/**
* We use taller rows when any header has a secondary label.
*/
get tallClass() {
return this.hasSecondaryLabelTabs;
}
get hasSecondaryLabelTabs() {
if (!this.tabHeaderQuery) {
return false;
}
return this.tabHeaderQuery
.toArray()
.some((h) => h.secondaryLabel != null && h.secondaryLabel !== "");
}
keyboardInput(event) {
if (!this.tabHeaderQuery) {
return;
}
const tabHeadersArray = this.tabHeaderQuery.toArray();
const enabledHeaders = tabHeadersArray.filter((h) => !h.disabled);
if (enabledHeaders.length === 0) {
return;
}
const referenceIndex = this.followFocus
? this.currentSelectedTab
: (this.activeIndex !== null ? this.activeIndex : this.currentSelectedTab);
const currentEnabledIndex = Math.max(0, enabledHeaders.indexOf(tabHeadersArray[referenceIndex]));
let nextEnabledIndex = currentEnabledIndex;
let handled = false;
if (event.key === "ArrowDown") {
nextEnabledIndex = (currentEnabledIndex + 1) % enabledHeaders.length;
handled = true;
}
else if (event.key === "ArrowUp") {
nextEnabledIndex = (enabledHeaders.length + currentEnabledIndex - 1) % enabledHeaders.length;
handled = true;
}
else if (event.key === "Home") {
nextEnabledIndex = 0;
handled = true;
}
else if (event.key === "End") {
nextEnabledIndex = enabledHeaders.length - 1;
handled = true;
}
if (handled) {
event.preventDefault();
const nextHeader = enabledHeaders[nextEnabledIndex];
const nextIndex = tabHeadersArray.indexOf(nextHeader);
if (this.followFocus) {
nextHeader.selectTab();
this.currentSelectedTab = nextIndex;
}
else {
nextHeader.focus();
this.activeIndex = nextIndex;
}
return;
}
if ((event.key === " " || event.key === "Spacebar") && !this.followFocus) {
const focusIndex = this.activeIndex !== null ? this.activeIndex : this.currentSelectedTab;
tabHeadersArray[focusIndex].selectTab();
this.currentSelectedTab = focusIndex;
}
}
handleBlur(event) {
const relatedTarget = event.relatedTarget;
const container = this.headerContainer?.nativeElement;
if (container && relatedTarget && container.contains(relatedTarget)) {
return;
}
if (!this.followFocus) {
this.activeIndex = this.currentSelectedTab;
}
}
ngOnInit() {
this.resizeObserver = new ResizeObserver(() => {
this.updateOverflowState();
this.changeDetectorRef.detectChanges();
});
this.resizeObserver.observe(this.headerContainer.nativeElement);
this.headerContainer.nativeElement.addEventListener("scroll", this.boundListScrollHandler);
}
ngOnDestroy() {
this.selectedSubscriptionTracker.unsubscribe();
this.closeSubscriptionTracker.unsubscribe();
this.resizeObserver?.unobserve(this.headerContainer.nativeElement);
this.resizeObserver = null;
this.headerContainer.nativeElement.removeEventListener("scroll", this.boundListScrollHandler);
}
ngAfterContentInit() {
// Reallocate trackers because subscriptions are permanently closed after unsubscribe
this.selectedSubscriptionTracker.unsubscribe();
this.closeSubscriptionTracker.unsubscribe();
this.selectedSubscriptionTracker = new Subscription();
this.closeSubscriptionTracker = new Subscription();
this.applyHeaderInputs();
this.wireSubscriptions();
this.tabHeaderQuery.changes.subscribe(() => {
// Re-wire when the projected list changes.
this.selectedSubscriptionTracker.unsubscribe();
this.closeSubscriptionTracker.unsubscribe();
this.selectedSubscriptionTracker = new Subscription();
this.closeSubscriptionTracker = new Subscription();
this.applyHeaderInputs();
this.wireSubscriptions();
this.changeDetectorRef.markForCheck();
});
setTimeout(() => {
const headers = this.tabHeaderQuery.toArray();
const activeIdx = headers.findIndex(h => h.active || h.paneReference?.active);
const initialIndex = activeIdx >= 0 ? activeIdx : 0;
this.currentSelectedTab = initialIndex;
this.activeIndex = initialIndex;
headers[initialIndex]?.selectTab();
this.updateOverflowState();
});
}
ngOnChanges(changes) {
if (this.tabHeaderQuery) {
if (changes.cacheActive) {
this.tabHeaderQuery.toArray().forEach(h => h.cacheActive = this.cacheActive);
}
if (changes.dismissable) {
this.tabHeaderQuery.toArray().forEach(h => h.dismissable = this.dismissable);
}
if (changes.isNavigation) {
this.tabHeaderQuery.toArray()
.forEach(h => h.paneTabIndex = this.isNavigation ? null : 0);
}
}
}
updateOverflowState() {
const element = this.headerContainer?.nativeElement;
if (!element) {
return;
}
const halfTabHeight = VERTICAL_TAB_HEIGHT / 2;
this.isOverflowingBottom =
element.scrollTop + element.clientHeight + halfTabHeight <= element.scrollHeight;
this.isOverflowingTop = element.scrollTop > halfTabHeight;
this.changeDetectorRef.markForCheck();
}
scrollSelectedTabIntoView() {
if (!this.scrollIntoView) {
return;
}
const container = this.headerContainer?.nativeElement;
if (!container) {
return;
}
container.scrollTo({
top: Math.max(0, (this.currentSelectedTab - 1) * VERTICAL_TAB_HEIGHT),
behavior: "smooth"
});
}
applyHeaderInputs() {
this.tabHeaderQuery.toArray().forEach((header) => {
header.cacheActive = this.cacheActive;
header.dismissable = this.dismissable;
header.paneTabIndex = this.isNavigation ? null : 0;
});
}
wireSubscriptions() {
this.tabHeaderQuery.toArray().forEach((header) => {
this.selectedSubscriptionTracker.add(header.selected.subscribe(() => {
this.currentSelectedTab = this.tabHeaderQuery
.toArray()
.indexOf(header);
this.tabHeaderQuery
.toArray()
.filter((h) => h !== header)
.forEach((other) => {
other.active = false;
if (other.paneReference) {
other.paneReference.active = false;
}
});
this.scrollSelectedTabIntoView();
}));
this.closeSubscriptionTracker.add(header.tabClose.subscribe(() => {
const index = this.tabHeaderQuery.toArray().indexOf(header);
this.tabClose.emit(index);
}));
});
}
}
TabHeaderGroupVertical.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "14.3.0", ngImport: i0, type: TabHeaderGroupVertical, deps: [{ token: i0.ElementRef }, { token: i0.ChangeDetectorRef }, { token: i1.EventService }, { token: i0.Renderer2 }, { token: i2.I18n }], target: i0.ɵɵFactoryTarget.Component });
TabHeaderGroupVertical.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "14.3.0", type: TabHeaderGroupVertical, selector: "cds-tab-header-group-vertical, ibm-tab-header-group-vertical", inputs: { translations: "translations", isNavigation: "isNavigation", followFocus: "followFocus" }, outputs: { tabClose: "tabClose" }, host: { listeners: { "keydown": "keyboardInput($event)", "blur": "handleBlur($event)" }, properties: { "class.cds--tabs--vertical": "this.verticalClass", "class.cds--tabs--tall": "this.tallClass" } }, queries: [{ propertyName: "tabHeaderQuery", predicate: TabHeaderBase }], viewQueries: [{ propertyName: "headerContainer", first: true, predicate: ["tabList"], descendants: true, static: true }], usesInheritance: true, usesOnChanges: true, ngImport: i0, template: `
<div *ngIf="isOverflowingTop" class="cds--tab--list-gradient_top"></div>
<div
#tabList
class="cds--tab--list"
role="tablist"
[attr.aria-label]="ariaLabel || translations.HEADER_ARIA_LABEL"
[attr.aria-labelledby]="ariaLabelledby || null">
<ng-container [ngTemplateOutlet]="contentBefore"></ng-container>
<ng-content></ng-content>
<ng-container [ngTemplateOutlet]="contentAfter"></ng-container>
</div>
<div *ngIf="isOverflowingBottom" class="cds--tab--list-gradient_bottom"></div>
`, isInline: true, dependencies: [{ kind: "directive", type: i3.NgIf, selector: "[ngIf]", inputs: ["ngIf", "ngIfThen", "ngIfElse"] }, { kind: "directive", type: i3.NgTemplateOutlet, selector: "[ngTemplateOutlet]", inputs: ["ngTemplateOutletContext", "ngTemplateOutlet", "ngTemplateOutletInjector"] }] });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "14.3.0", ngImport: i0, type: TabHeaderGroupVertical, decorators: [{
type: Component,
args: [{
selector: "cds-tab-header-group-vertical, ibm-tab-header-group-vertical",
template: `
<div *ngIf="isOverflowingTop" class="cds--tab--list-gradient_top"></div>
<div
#tabList
class="cds--tab--list"
role="tablist"
[attr.aria-label]="ariaLabel || translations.HEADER_ARIA_LABEL"
[attr.aria-labelledby]="ariaLabelledby || null">
<ng-container [ngTemplateOutlet]="contentBefore"></ng-container>
<ng-content></ng-content>
<ng-container [ngTemplateOutlet]="contentAfter"></ng-container>
</div>
<div *ngIf="isOverflowingBottom" class="cds--tab--list-gradient_bottom"></div>
`
}]
}], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: i0.ChangeDetectorRef }, { type: i1.EventService }, { type: i0.Renderer2 }, { type: i2.I18n }]; }, propDecorators: { translations: [{
type: Input
}], isNavigation: [{
type: Input
}], tabClose: [{
type: Output
}], followFocus: [{
type: Input
}], tabHeaderQuery: [{
type: ContentChildren,
args: [TabHeaderBase]
}], headerContainer: [{
type: ViewChild,
args: ["tabList", { static: true }]
}], verticalClass: [{
type: HostBinding,
args: ["class.cds--tabs--vertical"]
}], tallClass: [{
type: HostBinding,
args: ["class.cds--tabs--tall"]
}], keyboardInput: [{
type: HostListener,
args: ["keydown", ["$event"]]
}], handleBlur: [{
type: HostListener,
args: ["blur", ["$event"]]
}] } });
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{\r\n\tAfterContentInit,\r\n\tChangeDetectorRef,\r\n\tComponent,\r\n\tContentChildren,\r\n\tElementRef,\r\n\tEventEmitter,\r\n\tHostBinding,\r\n\tHostListener,\r\n\tInput,\r\n\tOnChanges,\r\n\tOnDestroy,\r\n\tOnInit,\r\n\tOutput,\r\n\tQueryList,\r\n\tRenderer2,\r\n\tSimpleChanges,\r\n\tViewChild\r\n} from \"@angular/core\";\r\nimport { Subscription } from \"rxjs\";\r\nimport { EventService } from \"carbon-components-angular/utils\";\r\nimport { I18n } from \"carbon-components-angular/i18n\";\r\n\r\nimport { BaseTabHeader } from \"./base-tab-header.component\";\r\nimport { TabHeaderBase } from \"./tab-header.directive\";\r\n\r\nconst VERTICAL_TAB_HEIGHT = 64;\r\n\r\n/**\r\n * Vertical tab header group: same children as `cds-tab-header-group`, with\r\n * up/down (and Home/End) keys, gradient overflow, and always-contained type.\r\n *\r\n *\r\n * ```html\r\n * <cds-tabs-vertical-grouped height=\"400px\">\r\n *   <cds-tab-header-group-vertical>\r\n *     <cds-tab-header [paneReference]=\"a\">A</cds-tab-header>\r\n *     <cds-tab-header [paneReference]=\"b\">B</cds-tab-header>\r\n *   </cds-tab-header-group-vertical>\r\n *   <cds-tab #a>...</cds-tab>\r\n *   <cds-tab #b>...</cds-tab>\r\n * </cds-tabs-vertical-grouped>\r\n * ```\r\n */\r\n@Component({\r\n\tselector: \"cds-tab-header-group-vertical, ibm-tab-header-group-vertical\",\r\n\ttemplate: `\r\n\t\t<div *ngIf=\"isOverflowingTop\" class=\"cds--tab--list-gradient_top\"></div>\r\n\t\t<div\r\n\t\t\t#tabList\r\n\t\t\tclass=\"cds--tab--list\"\r\n\t\t\trole=\"tablist\"\r\n\t\t\t[attr.aria-label]=\"ariaLabel || translations.HEADER_ARIA_LABEL\"\r\n\t\t\t[attr.aria-labelledby]=\"ariaLabelledby || null\">\r\n\t\t\t<ng-container [ngTemplateOutlet]=\"contentBefore\"></ng-container>\r\n\t\t\t<ng-content></ng-content>\r\n\t\t\t<ng-container [ngTemplateOutlet]=\"contentAfter\"></ng-container>\r\n\t\t</div>\r\n\t\t<div *ngIf=\"isOverflowingBottom\" class=\"cds--tab--list-gradient_bottom\"></div>\r\n\t`\r\n})\r\nexport class TabHeaderGroupVertical\r\n\textends BaseTabHeader\r\n\timplements AfterContentInit, OnChanges, OnInit, OnDestroy {\r\n\t/**\r\n\t * i18n strings for the tab list `aria-label` fallback.\r\n\t */\r\n\t@Input() translations = this.i18n.get().TABS;\r\n\r\n\t/**\r\n\t * When `true`, sets each tab panel `tabindex` to `-1` for navigation-style usage.\r\n\t */\r\n\t@Input() isNavigation = false;\r\n\r\n\t/**\r\n\t * Fires with tab index when a close control is used (with `dismissable`).\r\n\t */\r\n\t@Output() tabClose = new EventEmitter<number>();\r\n\r\n\t/**\r\n\t * Set to 'true' to have tabs automatically activated and have their content displayed when they receive focus.\r\n\t */\r\n\t@Input() followFocus = true;\r\n\r\n\t/**\r\n\t * ContentChildren of all the tab headers (both directive and component\r\n\t * forms — see `TabHeaderBase`).\r\n\t */\r\n\t@ContentChildren(TabHeaderBase) tabHeaderQuery: QueryList<TabHeaderBase>;\r\n\r\n\t@ViewChild(\"tabList\", { static: true }) headerContainer: ElementRef<HTMLElement>;\r\n\r\n\t@HostBinding(\"class.cds--tabs--vertical\") verticalClass = true;\r\n\r\n\t/**\r\n\t * Index of the selected tab for keyboard logic\r\n\t */\r\n\tcurrentSelectedTab = 0;\r\n\r\n\t/**\r\n\t * Focused tab index when `followFocus` is false (manual activation).\r\n\t */\r\n\tactiveIndex: number | null = null;\r\n\r\n\tisOverflowingTop = false;\r\n\tisOverflowingBottom = false;\r\n\r\n\t/**\r\n\t * We use taller rows when any header has a secondary label.\r\n\t */\r\n\t@HostBinding(\"class.cds--tabs--tall\") get tallClass(): boolean {\r\n\t\treturn this.hasSecondaryLabelTabs;\r\n\t}\r\n\r\n\tget hasSecondaryLabelTabs(): boolean {\r\n\t\tif (!this.tabHeaderQuery) {\r\n\t\t\treturn false;\r\n\t\t}\r\n\t\treturn this.tabHeaderQuery\r\n\t\t\t.toArray()\r\n\t\t\t.some((h) => h.secondaryLabel != null && h.secondaryLabel !== \"\");\r\n\t}\r\n\r\n\tprivate selectedSubscriptionTracker = new Subscription();\r\n\tprivate closeSubscriptionTracker = new Subscription();\r\n\r\n\tprivate resizeObserver: ResizeObserver | null = null;\r\n\tprivate boundListScrollHandler: () => void;\r\n\r\n\tconstructor(\r\n\t\tprotected elementRef: ElementRef,\r\n\t\tprotected changeDetectorRef: ChangeDetectorRef,\r\n\t\tprotected eventService: EventService,\r\n\t\tprotected renderer: Renderer2,\r\n\t\tprotected i18n: I18n\r\n\t) {\r\n\t\tsuper(elementRef, changeDetectorRef, eventService, renderer);\r\n\t\tthis.type = \"contained\";\r\n\t\t// Cache a stable reference for add/removeEventListener.\r\n\t\tthis.boundListScrollHandler = () => this.updateOverflowState();\r\n\t}\r\n\r\n\t@HostListener(\"keydown\", [\"$event\"])\r\n\tkeyboardInput(event: KeyboardEvent) {\r\n\t\tif (!this.tabHeaderQuery) {\r\n\t\t\treturn;\r\n\t\t}\r\n\t\tconst tabHeadersArray = this.tabHeaderQuery.toArray();\r\n\t\tconst enabledHeaders = tabHeadersArray.filter((h) => !h.disabled);\r\n\t\tif (enabledHeaders.length === 0) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tconst referenceIndex = this.followFocus\r\n\t\t\t? this.currentSelectedTab\r\n\t\t\t: (this.activeIndex !== null ? this.activeIndex : this.currentSelectedTab);\r\n\t\tconst currentEnabledIndex = Math.max(0, enabledHeaders.indexOf(tabHeadersArray[referenceIndex]));\r\n\r\n\t\tlet nextEnabledIndex = currentEnabledIndex;\r\n\t\tlet handled = false;\r\n\r\n\t\tif (event.key === \"ArrowDown\") {\r\n\t\t\tnextEnabledIndex = (currentEnabledIndex + 1) % enabledHeaders.length;\r\n\t\t\thandled = true;\r\n\t\t} else if (event.key === \"ArrowUp\") {\r\n\t\t\tnextEnabledIndex = (enabledHeaders.length + currentEnabledIndex - 1) % enabledHeaders.length;\r\n\t\t\thandled = true;\r\n\t\t} else if (event.key === \"Home\") {\r\n\t\t\tnextEnabledIndex = 0;\r\n\t\t\thandled = true;\r\n\t\t} else if (event.key === \"End\") {\r\n\t\t\tnextEnabledIndex = enabledHeaders.length - 1;\r\n\t\t\thandled = true;\r\n\t\t}\r\n\r\n\t\tif (handled) {\r\n\t\t\tevent.preventDefault();\r\n\t\t\tconst nextHeader = enabledHeaders[nextEnabledIndex];\r\n\t\t\tconst nextIndex = tabHeadersArray.indexOf(nextHeader);\r\n\r\n\t\t\tif (this.followFocus) {\r\n\t\t\t\tnextHeader.selectTab();\r\n\t\t\t\tthis.currentSelectedTab = nextIndex;\r\n\t\t\t} else {\r\n\t\t\t\tnextHeader.focus();\r\n\t\t\t\tthis.activeIndex = nextIndex;\r\n\t\t\t}\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tif ((event.key === \" \" || event.key === \"Spacebar\") && !this.followFocus) {\r\n\t\t\tconst focusIndex = this.activeIndex !== null ? this.activeIndex : this.currentSelectedTab;\r\n\t\t\ttabHeadersArray[focusIndex].selectTab();\r\n\t\t\tthis.currentSelectedTab = focusIndex;\r\n\t\t}\r\n\t}\r\n\r\n\t@HostListener(\"blur\", [\"$event\"])\r\n\thandleBlur(event: FocusEvent) {\r\n\t\tconst relatedTarget = event.relatedTarget as Node | null;\r\n\t\tconst container = this.headerContainer?.nativeElement;\r\n\t\tif (container && relatedTarget && container.contains(relatedTarget)) {\r\n\t\t\treturn;\r\n\t\t}\r\n\t\tif (!this.followFocus) {\r\n\t\t\tthis.activeIndex = this.currentSelectedTab;\r\n\t\t}\r\n\t}\r\n\r\n\tngOnInit() {\r\n\t\tthis.resizeObserver = new ResizeObserver(() => {\r\n\t\t\tthis.updateOverflowState();\r\n\t\t\tthis.changeDetectorRef.detectChanges();\r\n\t\t});\r\n\t\tthis.resizeObserver.observe(this.headerContainer.nativeElement);\r\n\t\tthis.headerContainer.nativeElement.addEventListener(\r\n\t\t\t\"scroll\",\r\n\t\t\tthis.boundListScrollHandler\r\n\t\t);\r\n\t}\r\n\r\n\tngOnDestroy() {\r\n\t\tthis.selectedSubscriptionTracker.unsubscribe();\r\n\t\tthis.closeSubscriptionTracker.unsubscribe();\r\n\t\tthis.resizeObserver?.unobserve(this.headerContainer.nativeElement);\r\n\t\tthis.resizeObserver = null;\r\n\t\tthis.headerContainer.nativeElement.removeEventListener(\r\n\t\t\t\"scroll\",\r\n\t\t\tthis.boundListScrollHandler\r\n\t\t);\r\n\t}\r\n\r\n\tngAfterContentInit() {\r\n\t\t// Reallocate trackers because subscriptions are permanently closed after unsubscribe\r\n\t\tthis.selectedSubscriptionTracker.unsubscribe();\r\n\t\tthis.closeSubscriptionTracker.unsubscribe();\r\n\t\tthis.selectedSubscriptionTracker = new Subscription();\r\n\t\tthis.closeSubscriptionTracker = new Subscription();\r\n\r\n\t\tthis.applyHeaderInputs();\r\n\t\tthis.wireSubscriptions();\r\n\r\n\t\tthis.tabHeaderQuery.changes.subscribe(() => {\r\n\t\t\t// Re-wire when the projected list changes.\r\n\t\t\tthis.selectedSubscriptionTracker.unsubscribe();\r\n\t\t\tthis.closeSubscriptionTracker.unsubscribe();\r\n\t\t\tthis.selectedSubscriptionTracker = new Subscription();\r\n\t\t\tthis.closeSubscriptionTracker = new Subscription();\r\n\t\t\tthis.applyHeaderInputs();\r\n\t\t\tthis.wireSubscriptions();\r\n\t\t\tthis.changeDetectorRef.markForCheck();\r\n\t\t});\r\n\r\n\t\tsetTimeout(() => {\r\n\t\t\tconst headers = this.tabHeaderQuery.toArray();\r\n\t\t\tconst activeIdx = headers.findIndex(h => h.active || h.paneReference?.active);\r\n\t\t\tconst initialIndex = activeIdx >= 0 ? activeIdx : 0;\r\n\t\t\tthis.currentSelectedTab = initialIndex;\r\n\t\t\tthis.activeIndex = initialIndex;\r\n\t\t\theaders[initialIndex]?.selectTab();\r\n\t\t\tthis.updateOverflowState();\r\n\t\t});\r\n\t}\r\n\r\n\tngOnChanges(changes: SimpleChanges) {\r\n\t\tif (this.tabHeaderQuery) {\r\n\t\t\tif (changes.cacheActive) {\r\n\t\t\t\tthis.tabHeaderQuery.toArray().forEach(h => h.cacheActive = this.cacheActive);\r\n\t\t\t}\r\n\t\t\tif (changes.dismissable) {\r\n\t\t\t\tthis.tabHeaderQuery.toArray().forEach(h => h.dismissable = this.dismissable);\r\n\t\t\t}\r\n\t\t\tif (changes.isNavigation) {\r\n\t\t\t\tthis.tabHeaderQuery.toArray()\r\n\t\t\t\t\t.forEach(h => h.paneTabIndex = this.isNavigation ? null : 0);\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n\r\n\tprotected updateOverflowState() {\r\n\t\tconst element = this.headerContainer?.nativeElement;\r\n\t\tif (!element) {\r\n\t\t\treturn;\r\n\t\t}\r\n\t\tconst halfTabHeight = VERTICAL_TAB_HEIGHT / 2;\r\n\t\tthis.isOverflowingBottom =\r\n\t\t\telement.scrollTop + element.clientHeight + halfTabHeight <= element.scrollHeight;\r\n\t\tthis.isOverflowingTop = element.scrollTop > halfTabHeight;\r\n\t\tthis.changeDetectorRef.markForCheck();\r\n\t}\r\n\r\n\tprotected scrollSelectedTabIntoView() {\r\n\t\tif (!this.scrollIntoView) {\r\n\t\t\treturn;\r\n\t\t}\r\n\t\tconst container = this.headerContainer?.nativeElement;\r\n\t\tif (!container) {\r\n\t\t\treturn;\r\n\t\t}\r\n\t\tcontainer.scrollTo({\r\n\t\t\ttop: Math.max(0, (this.currentSelectedTab - 1) * VERTICAL_TAB_HEIGHT),\r\n\t\t\tbehavior: \"smooth\"\r\n\t\t});\r\n\t}\r\n\r\n\tprivate applyHeaderInputs() {\r\n\t\tthis.tabHeaderQuery.toArray().forEach((header) => {\r\n\t\t\theader.cacheActive = this.cacheActive;\r\n\t\t\theader.dismissable = this.dismissable;\r\n\t\t\theader.paneTabIndex = this.isNavigation ? null : 0;\r\n\t\t});\r\n\t}\r\n\r\n\tprivate wireSubscriptions() {\r\n\t\tthis.tabHeaderQuery.toArray().forEach((header) => {\r\n\t\t\tthis.selectedSubscriptionTracker.add(\r\n\t\t\t\theader.selected.subscribe(() => {\r\n\t\t\t\t\tthis.currentSelectedTab = this.tabHeaderQuery\r\n\t\t\t\t\t\t.toArray()\r\n\t\t\t\t\t\t.indexOf(header);\r\n\t\t\t\t\tthis.tabHeaderQuery\r\n\t\t\t\t\t\t.toArray()\r\n\t\t\t\t\t\t.filter((h) => h !== header)\r\n\t\t\t\t\t\t.forEach((other) => {\r\n\t\t\t\t\t\t\tother.active = false;\r\n\t\t\t\t\t\t\tif (other.paneReference) {\r\n\t\t\t\t\t\t\t\tother.paneReference.active = false;\r\n\t\t\t\t\t\t\t}\r\n\t\t\t\t\t\t});\r\n\t\t\t\t\tthis.scrollSelectedTabIntoView();\r\n\t\t\t\t})\r\n\t\t\t);\r\n\r\n\t\t\tthis.closeSubscriptionTracker.add(\r\n\t\t\t\theader.tabClose.subscribe(() => {\r\n\t\t\t\t\tconst index = this.tabHeaderQuery.toArray().indexOf(header);\r\n\t\t\t\t\tthis.tabClose.emit(index);\r\n\t\t\t\t})\r\n\t\t\t);\r\n\t\t});\r\n\t}\r\n}\r\n"]}