ng-focus-selector
Version:
For device like `candy`, `qwerty`, `tv apps`, `stb` etc where element selection happens with keypad (or) remote, selection of element across the application will become complex.
116 lines • 15.6 kB
JavaScript
import { Component, HostListener, ElementRef } from '@angular/core';
import { Router, ActivatedRoute } from '@angular/router';
export class FocusSelectorComponent {
constructor(el, router, route) {
this.el = el;
this.router = router;
this.route = route;
}
onArrowLeftRight(event) {
const keyCode = event.keyCode || event.which;
const currentRow = parseInt(event.target.getAttribute('row'));
let column = parseInt(event.target.getAttribute('column'));
const currentElement = document.querySelector(`[row="${currentRow}"][column="${column}"]`);
if (currentElement && currentElement.getAttribute('istabitem')) {
const isNextElementTab = document.querySelector(`[tabfocus="true"]`);
if (isNextElementTab) {
let state = this.route.snapshot;
while (!state.firstChild.paramMap.get('column')) {
state = state.firstChild;
}
const { paramMap, params, data } = state.firstChild;
let column = parseInt(paramMap.get('column'));
if (keyCode === 37) {
column = column - 1;
}
else if (keyCode === 39) {
column = column + 1;
}
const isElementTab = document.querySelectorAll(`[istabheader="true"]`);
if (isElementTab.length && isElementTab[column]) {
if (isNextElementTab.getAttribute('tabfocus')) {
isNextElementTab.setAttribute('tabfocus', false);
}
isElementTab[column].setAttribute('tabfocus', true);
this.focusElement(isElementTab[column]);
const tabUrl = isElementTab[column].getAttribute('taburl');
if (tabUrl) {
this.router.navigateByUrl(tabUrl);
}
}
return;
}
}
if (keyCode === 37) {
column = column - 1;
}
else if (keyCode === 39) {
column = column + 1;
}
let matchElement = document.querySelector(`[row="${currentRow}"][column="${column}"]`);
if (matchElement) {
if (currentElement.getAttribute('tabfocus')) {
currentElement.setAttribute('tabfocus', false);
}
matchElement.setAttribute('tabfocus', true);
this.focusElement(matchElement);
const tabUrl = matchElement.getAttribute('taburl');
if (tabUrl) {
this.router.navigateByUrl(tabUrl);
}
}
}
onArrowDownUp(event) {
const keyCode = event.keyCode || event.which;
const isGrid = event.target.getAttribute('isgrid');
let currentRow = parseInt(event.target.getAttribute('row'));
let column = parseInt(event.target.getAttribute('column'));
column = isGrid ? column : 0;
if (keyCode === 40) {
currentRow = currentRow + 1;
}
else if (keyCode === 38) {
currentRow = currentRow - 1;
}
const isNextElementTab = document.querySelector(`[row="${currentRow}"][tabfocus="true"]`);
if (isNextElementTab && !isGrid) {
this.focusElement(isNextElementTab);
return;
}
let matchElement = document.querySelector(`[row="${currentRow}"][column="${column}"]`);
if (!matchElement) {
return;
}
this.focusElement(matchElement);
}
ngOnInit() { }
focusElement(el) {
el.focus();
el.scrollIntoView({
block: 'end',
inline: 'end'
});
}
setActiveIndex(index) {
const selector = this.el.nativeElement.getElementsByClassName('focus-selector');
if (selector[index]) {
this.focusElement(selector[index]);
}
}
}
FocusSelectorComponent.decorators = [
{ type: Component, args: [{
selector: 'ng-focus-selector',
template: '<ng-content></ng-content>'
},] }
];
FocusSelectorComponent.ctorParameters = () => [
{ type: ElementRef },
{ type: Router },
{ type: ActivatedRoute }
];
FocusSelectorComponent.propDecorators = {
onArrowLeftRight: [{ type: HostListener, args: ['document:keydown.ArrowLeft', ['$event'],] }, { type: HostListener, args: ['document:keydown.ArrowRight', ['$event'],] }],
onArrowDownUp: [{ type: HostListener, args: ['document:keydown.ArrowDown', ['$event'],] }, { type: HostListener, args: ['document:keydown.ArrowUp', ['$event'],] }]
};
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{ Component, OnInit, HostListener, ElementRef } from '@angular/core';\nimport { Router, ActivatedRoute, ActivatedRouteSnapshot } from '@angular/router';\n\n@Component({\n  selector: 'ng-focus-selector',\n  template: '<ng-content></ng-content>'\n})\nexport class FocusSelectorComponent implements OnInit {\n  @HostListener('document:keydown.ArrowLeft', ['$event'])\n  @HostListener('document:keydown.ArrowRight', ['$event'])\n  onArrowLeftRight(event) {\n    const keyCode = event.keyCode || event.which;\n    const currentRow = parseInt(event.target.getAttribute('row'));\n    let column = parseInt(event.target.getAttribute('column'));\n\n    const currentElement: any = document.querySelector(`[row=\"${currentRow}\"][column=\"${column}\"]`);\n\n    if (currentElement && currentElement.getAttribute('istabitem')) {\n      const isNextElementTab: any = document.querySelector(`[tabfocus=\"true\"]`);\n\n      if (isNextElementTab) {\n        let state: ActivatedRouteSnapshot = this.route.snapshot;\n        while (!state.firstChild.paramMap.get('column')) {\n          state = state.firstChild;\n        }\n        const { paramMap, params, data } = state.firstChild;\n        let column = parseInt(paramMap.get('column'));\n\n        if (keyCode === 37) {\n          column = column - 1;\n        } else if (keyCode === 39) {\n          column = column + 1;\n        }\n\n        const isElementTab: any = document.querySelectorAll(`[istabheader=\"true\"]`);\n\n        if (isElementTab.length && isElementTab[column]) {\n          if (isNextElementTab.getAttribute('tabfocus')) {\n            isNextElementTab.setAttribute('tabfocus', false);\n          }\n          isElementTab[column].setAttribute('tabfocus', true);\n          this.focusElement(isElementTab[column]);\n\n          const tabUrl = isElementTab[column].getAttribute('taburl');\n\n          if (tabUrl) {\n            this.router.navigateByUrl(tabUrl);\n          }\n        }\n        return;\n      }\n    }\n\n    if (keyCode === 37) {\n      column = column - 1;\n    } else if (keyCode === 39) {\n      column = column + 1;\n    }\n\n    let matchElement: any = document.querySelector(`[row=\"${currentRow}\"][column=\"${column}\"]`);\n\n    if (matchElement) {\n      if (currentElement.getAttribute('tabfocus')) {\n        currentElement.setAttribute('tabfocus', false);\n      }\n\n      matchElement.setAttribute('tabfocus', true);\n      this.focusElement(matchElement);\n\n      const tabUrl = matchElement.getAttribute('taburl');\n\n      if (tabUrl) {\n        this.router.navigateByUrl(tabUrl);\n      }\n    }\n  }\n\n  @HostListener('document:keydown.ArrowDown', ['$event'])\n  @HostListener('document:keydown.ArrowUp', ['$event'])\n  onArrowDownUp(event) {\n    const keyCode = event.keyCode || event.which;\n    const isGrid = event.target.getAttribute('isgrid');\n    let currentRow = parseInt(event.target.getAttribute('row'));\n    let column = parseInt(event.target.getAttribute('column'));\n    column = isGrid ? column : 0;\n\n    if (keyCode === 40) {\n      currentRow = currentRow + 1;\n    } else if (keyCode === 38) {\n      currentRow = currentRow - 1;\n    }\n\n    const isNextElementTab: any = document.querySelector(`[row=\"${currentRow}\"][tabfocus=\"true\"]`);\n\n    if (isNextElementTab && !isGrid) {\n      this.focusElement(isNextElementTab);\n      return;\n    }\n\n    let matchElement: any = document.querySelector(`[row=\"${currentRow}\"][column=\"${column}\"]`);\n\n    if (!matchElement) {\n      return;\n    }\n\n    this.focusElement(matchElement);\n  }\n\n  constructor(private el: ElementRef, private router: Router, private route: ActivatedRoute) {}\n\n  ngOnInit(): void {}\n\n  focusElement(el) {\n    el.focus();\n    el.scrollIntoView({\n      block: 'end',\n      inline: 'end'\n    });\n  }\n\n  setActiveIndex(index) {\n    const selector: any = this.el.nativeElement.getElementsByClassName('focus-selector');\n\n    if (selector[index]) {\n      this.focusElement(selector[index]);\n    }\n  }\n}\n"]}