@ionic/angular
Version:
Angular specific wrappers for @ionic/core
279 lines • 33.1 kB
JavaScript
import { Directive, ElementRef, EventEmitter, HostListener, Output, ViewChild, } from '@angular/core';
import * as i0 from "@angular/core";
import * as i1 from "../../providers/nav-controller";
/**
* Extracts `queryParams` and `fragment` from a tab button's href for use
* as Angular `NavigationExtras`. Returns `undefined` when neither is present.
*/
const parseHrefExtras = (href) => {
if (!href) {
return undefined;
}
const hashIndex = href.indexOf('#');
// Treat a bare `#` (no fragment text) as no fragment.
const fragment = hashIndex >= 0 && hashIndex < href.length - 1 ? href.slice(hashIndex + 1) : undefined;
const beforeHash = hashIndex >= 0 ? href.slice(0, hashIndex) : href;
const queryIndex = beforeHash.indexOf('?');
const search = queryIndex >= 0 ? beforeHash.slice(queryIndex + 1) : '';
let queryParams;
if (search) {
const params = new URLSearchParams(search);
queryParams = {};
for (const key of new Set(params.keys())) {
const all = params.getAll(key);
queryParams[key] = all.length > 1 ? all : all[0];
}
}
if (!queryParams && fragment === undefined) {
return undefined;
}
/**
* Build the result with only the populated keys so that a spread of the
* returned object does not overwrite saved `queryParams`/`fragment` with
* `undefined` (which `Object.assign`/spread would copy as a real key).
*/
const extras = {};
if (queryParams)
extras.queryParams = queryParams;
if (fragment !== undefined)
extras.fragment = fragment;
return extras;
};
class IonTabs {
navCtrl;
tabsInner;
/**
* Emitted before the tab view is changed.
*/
ionTabsWillChange = new EventEmitter();
/**
* Emitted after the tab view is changed.
*/
ionTabsDidChange = new EventEmitter();
tabBarSlot = 'bottom';
hasTab = false;
selectedTab;
leavingTab;
constructor(navCtrl) {
this.navCtrl = navCtrl;
}
ngAfterViewInit() {
/**
* Developers must pass at least one ion-tab
* inside of ion-tabs if they want to use a
* basic tab-based navigation without the
* history stack or URL updates associated
* with the router.
*/
const firstTab = this.tabs.length > 0 ? this.tabs.first : undefined;
if (firstTab) {
this.hasTab = true;
this.setActiveTab(firstTab.tab);
this.tabSwitch();
}
}
ngAfterContentInit() {
this.detectSlotChanges();
}
ngAfterContentChecked() {
this.detectSlotChanges();
}
/**
* @internal
*/
onStackWillChange({ enteringView, tabSwitch }) {
const stackId = enteringView.stackId;
if (tabSwitch && stackId !== undefined) {
this.ionTabsWillChange.emit({ tab: stackId });
}
}
/**
* @internal
*/
onStackDidChange({ enteringView, tabSwitch }) {
const stackId = enteringView.stackId;
if (tabSwitch && stackId !== undefined) {
if (this.tabBar) {
this.tabBar.selectedTab = stackId;
}
this.ionTabsDidChange.emit({ tab: stackId });
}
}
/**
* When a tab button is clicked, there are several scenarios:
* 1. If the selected tab is currently active (the tab button has been clicked
* again), then it should go to the root view for that tab.
*
* a. Get the saved root view from the router outlet. If the saved root view
* matches the tabRootUrl, set the route view to this view including the
* navigation extras. Any `queryParams` or `fragment` declared on the tab
* button's `href` are also forwarded.
* b. If the saved root view from the router outlet does not match, navigate
* to the tabRootUrl, forwarding any `queryParams`/`fragment` declared on
* the tab button's `href`.
*
* 2. If the current tab tab is not currently selected, get the last route
* view from the router outlet.
*
* a. If the last route view exists, navigate to that view including any
* navigation extras.
* b. If the last route view doesn't exist, then navigate to the default
* tabRootUrl, forwarding any `queryParams`/`fragment` declared on the
* tab button's `href`.
*/
select(tabOrEvent) {
const isTabString = typeof tabOrEvent === 'string';
const tab = isTabString ? tabOrEvent : tabOrEvent.detail.tab;
const href = isTabString ? undefined : tabOrEvent.detail.href;
/**
* If the tabs are not using the router, then
* the tab switch logic is handled by the tabs
* component itself.
*/
if (this.hasTab) {
this.setActiveTab(tab);
this.tabSwitch();
return;
}
const alreadySelected = this.outlet.getActiveStackId() === tab;
const tabRootUrl = `${this.outlet.tabsPrefix}/${tab}`;
/**
* The href pathname is ignored here; tab routing is driven by `tabsPrefix/tab`.
* Only the query and fragment are forwarded as navigation extras.
*/
const hrefExtras = parseHrefExtras(href);
/**
* If this is a nested tab, prevent the event
* from bubbling otherwise the outer tabs
* will respond to this event too, causing
* the app to get directed to the wrong place.
*/
if (!isTabString) {
tabOrEvent.stopPropagation();
}
if (alreadySelected) {
const activeStackId = this.outlet.getActiveStackId();
const activeView = this.outlet.getLastRouteView(activeStackId);
// If on root tab, do not navigate to root tab again
if (activeView?.url === tabRootUrl) {
return;
}
const rootView = this.outlet.getRootView(tab);
const navigationExtras = rootView && tabRootUrl === rootView.url && rootView.savedExtras;
return this.navCtrl.navigateRoot(tabRootUrl, {
...navigationExtras,
...hrefExtras,
animated: true,
animationDirection: 'back',
});
}
else {
const lastRoute = this.outlet.getLastRouteView(tab);
/**
* If there is a lastRoute, goto that, otherwise goto the fallback url of the
* selected tab. When falling back to the tab root, honor query params and
* fragment declared on the tab button's href.
*/
const url = lastRoute?.url || tabRootUrl;
const navigationExtras = lastRoute?.savedExtras ?? (url === tabRootUrl ? hrefExtras : undefined);
return this.navCtrl.navigateRoot(url, {
...navigationExtras,
animated: true,
animationDirection: 'back',
});
}
}
setActiveTab(tab) {
const tabs = this.tabs;
const selectedTab = tabs.find((t) => t.tab === tab);
if (!selectedTab) {
console.error(`[Ionic Error]: Tab with id: "${tab}" does not exist`);
return;
}
this.leavingTab = this.selectedTab;
this.selectedTab = selectedTab;
this.ionTabsWillChange.emit({ tab });
selectedTab.el.active = true;
}
tabSwitch() {
const { selectedTab, leavingTab } = this;
if (this.tabBar && selectedTab) {
this.tabBar.selectedTab = selectedTab.tab;
}
if (leavingTab?.tab !== selectedTab?.tab) {
if (leavingTab?.el) {
leavingTab.el.active = false;
}
}
if (selectedTab) {
this.ionTabsDidChange.emit({ tab: selectedTab.tab });
}
}
getSelected() {
if (this.hasTab) {
return this.selectedTab?.tab;
}
return this.outlet.getActiveStackId();
}
/**
* Detects changes to the slot attribute of the tab bar.
*
* If the slot attribute has changed, then the tab bar
* should be relocated to the new slot position.
*/
detectSlotChanges() {
this.tabBars.forEach((tabBar) => {
// el is a protected attribute from the generated component wrapper
const currentSlot = tabBar.el.getAttribute('slot');
if (currentSlot !== this.tabBarSlot) {
this.tabBarSlot = currentSlot;
this.relocateTabBar();
}
});
}
/**
* Relocates the tab bar to the new slot position.
*/
relocateTabBar() {
/**
* `el` is a protected attribute from the generated component wrapper.
* To avoid having to manually create the wrapper for tab bar, we
* cast the tab bar to any and access the protected attribute.
*/
const tabBar = this.tabBar.el;
if (this.tabBarSlot === 'top') {
/**
* A tab bar with a slot of "top" should be inserted
* at the top of the container.
*/
this.tabsInner.nativeElement.before(tabBar);
}
else {
/**
* A tab bar with a slot of "bottom" or without a slot
* should be inserted at the end of the container.
*/
this.tabsInner.nativeElement.after(tabBar);
}
}
/** @nocollapse */ static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: IonTabs, deps: [{ token: i1.NavController }], target: i0.ɵɵFactoryTarget.Directive });
/** @nocollapse */ static ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.2.12", type: IonTabs, selector: "ion-tabs", outputs: { ionTabsWillChange: "ionTabsWillChange", ionTabsDidChange: "ionTabsDidChange" }, host: { listeners: { "ionTabButtonClick": "select($event)" } }, viewQueries: [{ propertyName: "tabsInner", first: true, predicate: ["tabsInner"], descendants: true, read: ElementRef, static: true }], ngImport: i0 });
}
export { IonTabs };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: IonTabs, decorators: [{
type: Directive,
args: [{
selector: 'ion-tabs',
}]
}], ctorParameters: function () { return [{ type: i1.NavController }]; }, propDecorators: { tabsInner: [{
type: ViewChild,
args: ['tabsInner', { read: ElementRef, static: true }]
}], ionTabsWillChange: [{
type: Output
}], ionTabsDidChange: [{
type: Output
}], select: [{
type: HostListener,
args: ['ionTabButtonClick', ['$event']]
}] } });
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{\n  AfterContentChecked,\n  AfterContentInit,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  HostListener,\n  Output,\n  ViewChild,\n  AfterViewInit,\n  QueryList,\n} from '@angular/core';\nimport type { Params } from '@angular/router';\n\nimport { NavController } from '../../providers/nav-controller';\n\nimport { StackDidChangeEvent, StackWillChangeEvent } from './stack-utils';\n\n/**\n * Extracts `queryParams` and `fragment` from a tab button's href for use\n * as Angular `NavigationExtras`. Returns `undefined` when neither is present.\n */\nconst parseHrefExtras = (href: string | undefined): { queryParams?: Params; fragment?: string } | undefined => {\n  if (!href) {\n    return undefined;\n  }\n\n  const hashIndex = href.indexOf('#');\n  // Treat a bare `#` (no fragment text) as no fragment.\n  const fragment = hashIndex >= 0 && hashIndex < href.length - 1 ? href.slice(hashIndex + 1) : undefined;\n  const beforeHash = hashIndex >= 0 ? href.slice(0, hashIndex) : href;\n\n  const queryIndex = beforeHash.indexOf('?');\n  const search = queryIndex >= 0 ? beforeHash.slice(queryIndex + 1) : '';\n\n  let queryParams: Params | undefined;\n  if (search) {\n    const params = new URLSearchParams(search);\n    queryParams = {};\n    for (const key of new Set(params.keys())) {\n      const all = params.getAll(key);\n      queryParams[key] = all.length > 1 ? all : all[0];\n    }\n  }\n\n  if (!queryParams && fragment === undefined) {\n    return undefined;\n  }\n\n  /**\n   * Build the result with only the populated keys so that a spread of the\n   * returned object does not overwrite saved `queryParams`/`fragment` with\n   * `undefined` (which `Object.assign`/spread would copy as a real key).\n   */\n  const extras: { queryParams?: Params; fragment?: string } = {};\n  if (queryParams) extras.queryParams = queryParams;\n  if (fragment !== undefined) extras.fragment = fragment;\n  return extras;\n};\n\n@Directive({\n  selector: 'ion-tabs',\n})\n// eslint-disable-next-line @angular-eslint/directive-class-suffix\nexport abstract class IonTabs implements AfterViewInit, AfterContentInit, AfterContentChecked {\n  /**\n   * Note: These must be redeclared on each child class since it needs\n   * access to generated components such as IonRouterOutlet and IonTabBar.\n   */\n  abstract outlet: any;\n  abstract tabBar: any;\n  abstract tabBars: QueryList<any>;\n  abstract tabs: QueryList<any>;\n\n  @ViewChild('tabsInner', { read: ElementRef, static: true }) tabsInner: ElementRef<HTMLDivElement>;\n\n  /**\n   * Emitted before the tab view is changed.\n   */\n  @Output() ionTabsWillChange = new EventEmitter<{ tab: string }>();\n  /**\n   * Emitted after the tab view is changed.\n   */\n  @Output() ionTabsDidChange = new EventEmitter<{ tab: string }>();\n\n  private tabBarSlot = 'bottom';\n\n  private hasTab = false;\n  private selectedTab?: { tab: string };\n  private leavingTab?: any;\n\n  constructor(private navCtrl: NavController) {}\n\n  ngAfterViewInit(): void {\n    /**\n     * Developers must pass at least one ion-tab\n     * inside of ion-tabs if they want to use a\n     * basic tab-based navigation without the\n     * history stack or URL updates associated\n     * with the router.\n     */\n    const firstTab = this.tabs.length > 0 ? this.tabs.first : undefined;\n\n    if (firstTab) {\n      this.hasTab = true;\n      this.setActiveTab(firstTab.tab);\n      this.tabSwitch();\n    }\n  }\n\n  ngAfterContentInit(): void {\n    this.detectSlotChanges();\n  }\n\n  ngAfterContentChecked(): void {\n    this.detectSlotChanges();\n  }\n\n  /**\n   * @internal\n   */\n  onStackWillChange({ enteringView, tabSwitch }: StackWillChangeEvent): void {\n    const stackId = enteringView.stackId;\n    if (tabSwitch && stackId !== undefined) {\n      this.ionTabsWillChange.emit({ tab: stackId });\n    }\n  }\n\n  /**\n   * @internal\n   */\n  onStackDidChange({ enteringView, tabSwitch }: StackDidChangeEvent): void {\n    const stackId = enteringView.stackId;\n    if (tabSwitch && stackId !== undefined) {\n      if (this.tabBar) {\n        this.tabBar.selectedTab = stackId;\n      }\n      this.ionTabsDidChange.emit({ tab: stackId });\n    }\n  }\n\n  /**\n   * When a tab button is clicked, there are several scenarios:\n   * 1. If the selected tab is currently active (the tab button has been clicked\n   *    again), then it should go to the root view for that tab.\n   *\n   *   a. Get the saved root view from the router outlet. If the saved root view\n   *      matches the tabRootUrl, set the route view to this view including the\n   *      navigation extras. Any `queryParams` or `fragment` declared on the tab\n   *      button's `href` are also forwarded.\n   *   b. If the saved root view from the router outlet does not match, navigate\n   *      to the tabRootUrl, forwarding any `queryParams`/`fragment` declared on\n   *      the tab button's `href`.\n   *\n   * 2. If the current tab tab is not currently selected, get the last route\n   *    view from the router outlet.\n   *\n   *   a. If the last route view exists, navigate to that view including any\n   *      navigation extras.\n   *   b. If the last route view doesn't exist, then navigate to the default\n   *      tabRootUrl, forwarding any `queryParams`/`fragment` declared on the\n   *      tab button's `href`.\n   */\n  @HostListener('ionTabButtonClick', ['$event'])\n  select(tabOrEvent: string | CustomEvent): Promise<boolean> | undefined {\n    const isTabString = typeof tabOrEvent === 'string';\n    const tab = isTabString ? tabOrEvent : (tabOrEvent as CustomEvent).detail.tab;\n    const href: string | undefined = isTabString ? undefined : (tabOrEvent as CustomEvent).detail.href;\n\n    /**\n     * If the tabs are not using the router, then\n     * the tab switch logic is handled by the tabs\n     * component itself.\n     */\n    if (this.hasTab) {\n      this.setActiveTab(tab);\n      this.tabSwitch();\n\n      return;\n    }\n\n    const alreadySelected = this.outlet.getActiveStackId() === tab;\n    const tabRootUrl = `${this.outlet.tabsPrefix}/${tab}`;\n\n    /**\n     * The href pathname is ignored here; tab routing is driven by `tabsPrefix/tab`.\n     * Only the query and fragment are forwarded as navigation extras.\n     */\n    const hrefExtras = parseHrefExtras(href);\n\n    /**\n     * If this is a nested tab, prevent the event\n     * from bubbling otherwise the outer tabs\n     * will respond to this event too, causing\n     * the app to get directed to the wrong place.\n     */\n    if (!isTabString) {\n      (tabOrEvent as CustomEvent).stopPropagation();\n    }\n\n    if (alreadySelected) {\n      const activeStackId = this.outlet.getActiveStackId();\n      const activeView = this.outlet.getLastRouteView(activeStackId);\n\n      // If on root tab, do not navigate to root tab again\n      if (activeView?.url === tabRootUrl) {\n        return;\n      }\n\n      const rootView = this.outlet.getRootView(tab);\n      const navigationExtras = rootView && tabRootUrl === rootView.url && rootView.savedExtras;\n      return this.navCtrl.navigateRoot(tabRootUrl, {\n        ...navigationExtras,\n        ...hrefExtras,\n        animated: true,\n        animationDirection: 'back',\n      });\n    } else {\n      const lastRoute = this.outlet.getLastRouteView(tab);\n      /**\n       * If there is a lastRoute, goto that, otherwise goto the fallback url of the\n       * selected tab. When falling back to the tab root, honor query params and\n       * fragment declared on the tab button's href.\n       */\n      const url = lastRoute?.url || tabRootUrl;\n      const navigationExtras = lastRoute?.savedExtras ?? (url === tabRootUrl ? hrefExtras : undefined);\n\n      return this.navCtrl.navigateRoot(url, {\n        ...navigationExtras,\n        animated: true,\n        animationDirection: 'back',\n      });\n    }\n  }\n\n  private setActiveTab(tab: string): void {\n    const tabs = this.tabs;\n    const selectedTab = tabs.find((t: any) => t.tab === tab);\n\n    if (!selectedTab) {\n      console.error(`[Ionic Error]: Tab with id: \"${tab}\" does not exist`);\n      return;\n    }\n\n    this.leavingTab = this.selectedTab;\n    this.selectedTab = selectedTab;\n\n    this.ionTabsWillChange.emit({ tab });\n\n    selectedTab.el.active = true;\n  }\n\n  private tabSwitch(): void {\n    const { selectedTab, leavingTab } = this;\n\n    if (this.tabBar && selectedTab) {\n      this.tabBar.selectedTab = selectedTab.tab;\n    }\n\n    if (leavingTab?.tab !== selectedTab?.tab) {\n      if (leavingTab?.el) {\n        leavingTab.el.active = false;\n      }\n    }\n\n    if (selectedTab) {\n      this.ionTabsDidChange.emit({ tab: selectedTab.tab });\n    }\n  }\n\n  getSelected(): string | undefined {\n    if (this.hasTab) {\n      return this.selectedTab?.tab;\n    }\n\n    return this.outlet.getActiveStackId();\n  }\n\n  /**\n   * Detects changes to the slot attribute of the tab bar.\n   *\n   * If the slot attribute has changed, then the tab bar\n   * should be relocated to the new slot position.\n   */\n  private detectSlotChanges(): void {\n    this.tabBars.forEach((tabBar: any) => {\n      // el is a protected attribute from the generated component wrapper\n      const currentSlot = tabBar.el.getAttribute('slot');\n\n      if (currentSlot !== this.tabBarSlot) {\n        this.tabBarSlot = currentSlot;\n        this.relocateTabBar();\n      }\n    });\n  }\n\n  /**\n   * Relocates the tab bar to the new slot position.\n   */\n  private relocateTabBar(): void {\n    /**\n     * `el` is a protected attribute from the generated component wrapper.\n     * To avoid having to manually create the wrapper for tab bar, we\n     * cast the tab bar to any and access the protected attribute.\n     */\n    const tabBar = (this.tabBar as any).el as HTMLElement;\n\n    if (this.tabBarSlot === 'top') {\n      /**\n       * A tab bar with a slot of \"top\" should be inserted\n       * at the top of the container.\n       */\n      this.tabsInner.nativeElement.before(tabBar);\n    } else {\n      /**\n       * A tab bar with a slot of \"bottom\" or without a slot\n       * should be inserted at the end of the container.\n       */\n      this.tabsInner.nativeElement.after(tabBar);\n    }\n  }\n}\n"]}