mdc-autocomplete-list
Version:
MdcAutocomplete in conjunction with MdcAutocompleteList and MdcAutocompleteListItem are a pack of angular components to provide an autocomplete functionality to Angular MDC web.
209 lines (208 loc) • 19.7 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,uselessCode} checked by tsc
*/
import { Component, ContentChildren, QueryList, Input, Output } from '@angular/core';
import { MdcAutocompleteListItem } from 'mdc-autocomplete-list-item';
import { Subject } from 'rxjs';
// tslint:disable-next-line:component-class-suffix
export class MdcAutocompleteList {
constructor() {
this.itemSelected = new Subject();
this.maxVisibleItems = Number.POSITIVE_INFINITY;
this._visible = false;
this._filter = '';
}
/**
* @return {?}
*/
get visible() {
return this._visible;
}
/**
* @param {?} v
* @return {?}
*/
set visible(v) {
this._visible = v;
if (v) {
this.filterItems();
this.focusFirstItem();
}
else {
this.unfocusAllItems();
}
}
/**
* @return {?}
*/
get filter() {
return this._filter;
}
/**
* @param {?} f
* @return {?}
*/
set filter(f) {
this._filter = f;
this.filterItems();
this.focusFirstItem();
}
/**
* @return {?}
*/
ngOnInit() {
}
/**
* @return {?}
*/
ngAfterContentChecked() {
this.autocompleteListItems.toArray().forEach((item) => {
if (item.itemClicked.observers.length === 0) {
// Only allow one subscription
item.itemClicked.subscribe((itemValue) => {
this.itemSelected.next(itemValue);
});
}
if (item.itemHovered.observers.length === 0) {
// Only allow one subscription
item.itemHovered.subscribe((itemValue) => {
this.unfocusAllItems();
item.focused = true;
});
}
});
}
/**
* @return {?}
*/
unfocusAllItems() {
this.autocompleteListItems.toArray().forEach((item) => {
item.focused = false;
});
}
/**
* @return {?}
*/
focusNextItem() {
/** @type {?} */
const focusedItems = this.autocompleteListItems.filter((item, index, list) => item.focused);
/** @type {?} */
const focusedItem = focusedItems.length > 0 ? focusedItems[0] : null;
/** @type {?} */
const visibleItems = this.autocompleteListItems.filter((item, index, list) => item.visible);
if (focusedItem) {
/** @type {?} */
const focusedItemIndex = visibleItems.indexOf(focusedItem);
/** @type {?} */
const nextFocusedItem = (visibleItems.length >= focusedItemIndex + 1) ? visibleItems[focusedItemIndex + 1] : null;
if (nextFocusedItem) {
focusedItem.focused = false;
nextFocusedItem.focused = true;
nextFocusedItem.scrollIntoView();
}
}
else {
if (visibleItems.length > 0) {
visibleItems[0].focused = true;
}
}
}
/**
* @return {?}
*/
focusPreviousItem() {
/** @type {?} */
const focusedItems = this.autocompleteListItems.filter((item, index, list) => item.focused);
/** @type {?} */
const focusedItem = focusedItems.length > 0 ? focusedItems[0] : null;
/** @type {?} */
const visibleItems = this.autocompleteListItems.filter((item, index, list) => item.visible);
if (focusedItem) {
/** @type {?} */
const focusedItemIndex = visibleItems.indexOf(focusedItem);
/** @type {?} */
const previousFocusedItem = (focusedItemIndex > 0) ? visibleItems[focusedItemIndex - 1] : null;
if (previousFocusedItem) {
focusedItem.focused = false;
previousFocusedItem.focused = true;
previousFocusedItem.scrollIntoView();
}
}
else {
if (visibleItems.length > 0) {
visibleItems[0].focused = true;
}
}
}
/**
* @return {?}
*/
focusFirstItem() {
this.unfocusAllItems();
/** @type {?} */
const visibleItems = this.autocompleteListItems.filter((item, index, list) => item.visible);
if (visibleItems.length > 0) {
visibleItems[0].focused = true;
}
}
/**
* @return {?}
*/
selectFocusedItem() {
/** @type {?} */
const focusedItems = this.autocompleteListItems.filter((item, index, list) => item.focused);
/** @type {?} */
const focusedItem = focusedItems.length > 0 ? focusedItems[0] : null;
if (focusedItem) {
this.itemSelected.next(focusedItem.value);
}
}
/**
* @return {?}
*/
filterItems() {
/** @type {?} */
let showing = 0;
this.autocompleteListItems.forEach((item, index, list) => {
if (showing < this.maxVisibleItems && item.filterString.toUpperCase().includes(this._filter.toUpperCase())) {
item.visible = true;
showing++;
}
else {
item.visible = false;
item.focused = false;
}
});
}
}
MdcAutocompleteList.decorators = [
{ type: Component, args: [{
selector: 'mdc-autocomplete-list',
template: `<ul *ngIf="visible" class="mdc-elevation--z2">
<ng-content></ng-content>
</ul>
`,
styles: [`ul{position:absolute;min-width:200px;max-height:400px;padding:0;margin:0;background-color:#fff;overflow-y:scroll;list-style:none}`]
},] },
];
/** @nocollapse */
MdcAutocompleteList.ctorParameters = () => [];
MdcAutocompleteList.propDecorators = {
maxVisibleItems: [{ type: Input }],
itemSelected: [{ type: Output }],
autocompleteListItems: [{ type: ContentChildren, args: [MdcAutocompleteListItem,] }]
};
if (false) {
/** @type {?} */
MdcAutocompleteList.prototype.maxVisibleItems;
/** @type {?} */
MdcAutocompleteList.prototype.itemSelected;
/** @type {?} */
MdcAutocompleteList.prototype.autocompleteListItems;
/** @type {?} */
MdcAutocompleteList.prototype._visible;
/** @type {?} */
MdcAutocompleteList.prototype._filter;
}
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{ Component, OnInit, ContentChildren, QueryList, Input, Output, AfterContentChecked } from '@angular/core';\r\nimport { MdcAutocompleteListItem } from 'mdc-autocomplete-list-item';\r\nimport { Subject } from 'rxjs';\r\n\r\n@Component({\r\n  selector: 'mdc-autocomplete-list',\r\n  template: `<ul *ngIf=\"visible\" class=\"mdc-elevation--z2\">\r\n  <ng-content></ng-content>\r\n</ul>\r\n`,\r\n  styles: [`ul{position:absolute;min-width:200px;max-height:400px;padding:0;margin:0;background-color:#fff;overflow-y:scroll;list-style:none}`]\r\n})\r\n// tslint:disable-next-line:component-class-suffix\r\nexport class MdcAutocompleteList implements OnInit, AfterContentChecked {\r\n\r\n  @Input() maxVisibleItems: number;\r\n  @Output() public itemSelected: Subject<any> = new Subject();\r\n\r\n  @ContentChildren(MdcAutocompleteListItem) autocompleteListItems:  QueryList<MdcAutocompleteListItem>;\r\n  _visible: boolean;\r\n  _filter: string;\r\n\r\n  public get visible(): boolean {\r\n    return this._visible;\r\n  }\r\n\r\n  public set visible(v: boolean) {\r\n    this._visible = v;\r\n    if (v) {\r\n      this.filterItems();\r\n      this.focusFirstItem();\r\n    } else {\r\n      this.unfocusAllItems();\r\n    }\r\n  }\r\n\r\n  public get filter(): string {\r\n    return this._filter;\r\n  }\r\n\r\n  public set filter(f: string) {\r\n    this._filter = f;\r\n    this.filterItems();\r\n    this.focusFirstItem();\r\n  }\r\n\r\n  constructor() {\r\n    this.maxVisibleItems = Number.POSITIVE_INFINITY;\r\n    this._visible = false;\r\n    this._filter = '';\r\n  }\r\n\r\n  ngOnInit() {\r\n  }\r\n\r\n  ngAfterContentChecked() {\r\n    this.autocompleteListItems.toArray().forEach((item) => {\r\n      if (item.itemClicked.observers.length === 0) { // Only allow one subscription\r\n        item.itemClicked.subscribe((itemValue) => {\r\n          this.itemSelected.next(itemValue);\r\n        });\r\n      }\r\n\r\n      if (item.itemHovered.observers.length === 0) { // Only allow one subscription\r\n        item.itemHovered.subscribe((itemValue) => {\r\n          this.unfocusAllItems();\r\n          item.focused = true;\r\n        });\r\n      }\r\n    });\r\n  }\r\n\r\n  public unfocusAllItems() {\r\n    this.autocompleteListItems.toArray().forEach((item) => {\r\n      item.focused = false;\r\n    });\r\n  }\r\n\r\n  public focusNextItem() {\r\n    const focusedItems = this.autocompleteListItems.filter((item, index, list) => item.focused);\r\n    const focusedItem = focusedItems.length > 0 ? focusedItems[0] : null;\r\n    const visibleItems = this.autocompleteListItems.filter((item, index, list) => item.visible);\r\n\r\n    if (focusedItem) {\r\n      const focusedItemIndex = visibleItems.indexOf(focusedItem);\r\n      const nextFocusedItem = (visibleItems.length >= focusedItemIndex + 1) ? visibleItems[focusedItemIndex + 1] : null;\r\n      if (nextFocusedItem) {\r\n        focusedItem.focused = false;\r\n        nextFocusedItem.focused = true;\r\n        nextFocusedItem.scrollIntoView();\r\n      }\r\n    } else {\r\n      if (visibleItems.length > 0) {\r\n        visibleItems[0].focused = true;\r\n      }\r\n    }\r\n  }\r\n\r\n  public focusPreviousItem() {\r\n    const focusedItems = this.autocompleteListItems.filter((item, index, list) => item.focused);\r\n    const focusedItem = focusedItems.length > 0 ? focusedItems[0] : null;\r\n    const visibleItems = this.autocompleteListItems.filter((item, index, list) => item.visible);\r\n\r\n    if (focusedItem) {\r\n      const focusedItemIndex = visibleItems.indexOf(focusedItem);\r\n      const previousFocusedItem = (focusedItemIndex > 0) ? visibleItems[focusedItemIndex - 1] : null;\r\n      if (previousFocusedItem) {\r\n        focusedItem.focused = false;\r\n        previousFocusedItem.focused = true;\r\n        previousFocusedItem.scrollIntoView();\r\n      }\r\n    } else {\r\n      if (visibleItems.length > 0) {\r\n        visibleItems[0].focused = true;\r\n      }\r\n    }\r\n  }\r\n\r\n  public focusFirstItem() {\r\n    this.unfocusAllItems();\r\n    const visibleItems = this.autocompleteListItems.filter((item, index, list) => item.visible);\r\n    if (visibleItems.length > 0) {\r\n      visibleItems[0].focused = true;\r\n    }\r\n  }\r\n\r\n  public selectFocusedItem() {\r\n    const focusedItems = this.autocompleteListItems.filter((item, index, list) => item.focused);\r\n    const focusedItem = focusedItems.length > 0 ? focusedItems[0] : null;\r\n\r\n    if (focusedItem) {\r\n      this.itemSelected.next(focusedItem.value);\r\n    }\r\n  }\r\n\r\n  private filterItems() {\r\n    let showing = 0;\r\n    this.autocompleteListItems.forEach((item, index, list) => {\r\n      if (showing < this.maxVisibleItems && item.filterString.toUpperCase().includes(this._filter.toUpperCase())) {\r\n        item.visible = true;\r\n        showing++;\r\n      } else {\r\n        item.visible = false;\r\n        item.focused = false;\r\n      }\r\n    });\r\n  }\r\n}\r\n"]}