@alauda-fe/common
Version:
Alauda frontend team common codes.
122 lines • 13.4 kB
JavaScript
import { DropdownDirective, MenuItemComponent, SearchComponent, } from '@alauda/ui';
import { ChangeDetectorRef, Directive, ElementRef, QueryList, ViewChild, ViewChildren, } from '@angular/core';
import { Subject } from 'rxjs';
import { scrollIntoView, sleep } from '../../../../core/utils/public-api';
import * as i0 from "@angular/core";
const _c0 = ["menuItemsContainer"];
export class BaseSelection {
constructor(cdr) {
this.cdr = cdr;
this.focusedMenuItemIndex = -1;
this.keyword$$ = new Subject();
this.onKeyDown = (event) => {
switch (event.key) {
case 'ArrowDown': {
this.focusMenuItem('down');
event.stopPropagation();
event.preventDefault();
break;
}
case 'ArrowUp': {
this.focusMenuItem('up');
event.stopPropagation();
event.preventDefault();
break;
}
case 'Enter': {
if (this.focusedMenuItemIndex >= 0) {
this.selectByIndex(this.focusedMenuItemIndex);
this.closeDropdown();
}
event.stopPropagation();
event.preventDefault();
break;
}
case 'Escape': {
this.closeDropdown();
event.stopPropagation();
event.preventDefault();
break;
}
}
};
}
async handleMenuVisible(visible) {
if (visible) {
await sleep();
const input = this.getInputEl();
input.focus();
input.addEventListener('keydown', this.onKeyDown);
}
else {
this.keyword$$.next('');
this.getInputEl().removeEventListener('keydown', this.onKeyDown);
}
}
getInputEl() {
return this.inputContainer.nativeElement.querySelector('input');
}
closeDropdown() {
this.dropdown.hide();
}
focusMenuItem(dir) {
if (!this.menuItems.length) {
return;
}
const items = this.menuItems.toArray();
const step = dir === 'down' ? 1 : -1;
let i = this.focusedMenuItemIndex;
i = i + step;
if (i >= items.length) {
i = 0;
}
else if (i < 0) {
i = items.length - 1;
}
this.resetFocusedItem(i);
}
resetFocusedItem(index) {
if (this.focusedMenuItemIndex === index) {
return;
}
this.focusedMenuItemIndex = index;
this.cdr.markForCheck();
if (this.focusedMenuItemIndex >= 0) {
this.scrollToOption(this.menuItems.toArray()[this.focusedMenuItemIndex]);
}
}
scrollToOption(item) {
if (this.menuItemsContainer) {
scrollIntoView(this.menuItemsContainer.nativeElement, item.nativeElement);
}
}
static { this.ɵfac = function BaseSelection_Factory(t) { return new (t || BaseSelection)(i0.ɵɵdirectiveInject(i0.ChangeDetectorRef)); }; }
static { this.ɵdir = /*@__PURE__*/ i0.ɵɵdefineDirective({ type: BaseSelection, viewQuery: function BaseSelection_Query(rf, ctx) { if (rf & 1) {
i0.ɵɵviewQuery(SearchComponent, 5, ElementRef);
i0.ɵɵviewQuery(_c0, 5);
i0.ɵɵviewQuery(DropdownDirective, 5);
i0.ɵɵviewQuery(MenuItemComponent, 5, ElementRef);
} if (rf & 2) {
let _t;
i0.ɵɵqueryRefresh(_t = i0.ɵɵloadQuery()) && (ctx.inputContainer = _t.first);
i0.ɵɵqueryRefresh(_t = i0.ɵɵloadQuery()) && (ctx.menuItemsContainer = _t.first);
i0.ɵɵqueryRefresh(_t = i0.ɵɵloadQuery()) && (ctx.dropdown = _t.first);
i0.ɵɵqueryRefresh(_t = i0.ɵɵloadQuery()) && (ctx.menuItems = _t);
} } }); }
}
(() => { (typeof ngDevMode === "undefined" || ngDevMode) && i0.ɵsetClassMetadata(BaseSelection, [{
type: Directive
}], () => [{ type: i0.ChangeDetectorRef }], { inputContainer: [{
type: ViewChild,
args: [SearchComponent, { read: ElementRef }]
}], menuItems: [{
type: ViewChildren,
args: [MenuItemComponent, { read: ElementRef }]
}], menuItemsContainer: [{
type: ViewChild,
args: ['menuItemsContainer']
}], dropdown: [{
type: ViewChild,
args: [DropdownDirective]
}] }); })();
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{\n  DropdownDirective,\n  MenuItemComponent,\n  SearchComponent,\n} from '@alauda/ui';\nimport {\n  ChangeDetectorRef,\n  Directive,\n  ElementRef,\n  QueryList,\n  ViewChild,\n  ViewChildren,\n} from '@angular/core';\nimport { Subject } from 'rxjs';\n\nimport { scrollIntoView, sleep } from '../../../../core/utils/public-api';\n\n@Directive()\nexport abstract class BaseSelection {\n  @ViewChild(SearchComponent, { read: ElementRef })\n  protected inputContainer: ElementRef<HTMLDivElement>;\n\n  @ViewChildren(MenuItemComponent, { read: ElementRef })\n  protected menuItems: QueryList<ElementRef>;\n\n  @ViewChild('menuItemsContainer')\n  protected menuItemsContainer: ElementRef;\n\n  @ViewChild(DropdownDirective)\n  protected dropdown: DropdownDirective;\n\n  focusedMenuItemIndex = -1;\n\n  keyword$$ = new Subject<string>();\n\n  constructor(protected cdr: ChangeDetectorRef) {}\n\n  async handleMenuVisible(visible: boolean) {\n    if (visible) {\n      await sleep();\n      const input = this.getInputEl();\n      input.focus();\n      input.addEventListener('keydown', this.onKeyDown);\n    } else {\n      this.keyword$$.next('');\n      this.getInputEl().removeEventListener('keydown', this.onKeyDown);\n    }\n  }\n\n  private getInputEl(): HTMLInputElement {\n    return this.inputContainer.nativeElement.querySelector('input');\n  }\n\n  private readonly onKeyDown = (event: KeyboardEvent) => {\n    switch (event.key) {\n      case 'ArrowDown': {\n        this.focusMenuItem('down');\n        event.stopPropagation();\n        event.preventDefault();\n        break;\n      }\n      case 'ArrowUp': {\n        this.focusMenuItem('up');\n        event.stopPropagation();\n        event.preventDefault();\n        break;\n      }\n      case 'Enter': {\n        if (this.focusedMenuItemIndex >= 0) {\n          this.selectByIndex(this.focusedMenuItemIndex);\n          this.closeDropdown();\n        }\n        event.stopPropagation();\n        event.preventDefault();\n        break;\n      }\n      case 'Escape': {\n        this.closeDropdown();\n        event.stopPropagation();\n        event.preventDefault();\n        break;\n      }\n    }\n  };\n\n  private closeDropdown() {\n    this.dropdown.hide();\n  }\n\n  private focusMenuItem(dir: 'down' | 'up') {\n    if (!this.menuItems.length) {\n      return;\n    }\n    const items = this.menuItems.toArray();\n    const step = dir === 'down' ? 1 : -1;\n    let i = this.focusedMenuItemIndex;\n    i = i + step;\n    if (i >= items.length) {\n      i = 0;\n    } else if (i < 0) {\n      i = items.length - 1;\n    }\n\n    this.resetFocusedItem(i);\n  }\n\n  private resetFocusedItem(index: number) {\n    if (this.focusedMenuItemIndex === index) {\n      return;\n    }\n\n    this.focusedMenuItemIndex = index;\n    this.cdr.markForCheck();\n    if (this.focusedMenuItemIndex >= 0) {\n      this.scrollToOption(this.menuItems.toArray()[this.focusedMenuItemIndex]);\n    }\n  }\n\n  private scrollToOption(item: ElementRef) {\n    if (this.menuItemsContainer) {\n      scrollIntoView(this.menuItemsContainer.nativeElement, item.nativeElement);\n    }\n  }\n\n  abstract selectByIndex(index: number): void;\n}\n"]}