@visa/nova-angular
Version:
Visa Product Design System Nova Angular library
157 lines • 24.1 kB
JavaScript
/**
* Copyright (c) 2025 Visa, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**/
import { Injectable } from '@angular/core';
import { UUIDService } from '../_utilities/services/uuid.service';
import * as i0 from "@angular/core";
import * as i1 from "../_utilities/services/uuid.service";
/**
* AccordionService is an internal service used to create accordion behavior and is used within the accordion component.
*/
export class AccordionService {
constructor(uuidService) {
this.uuidService = uuidService;
/** @ignore */
this.items = [];
}
/**
* The setUpAccordion method sets up the accordion by pairing accordion headings with their respective panels and having them reflect the same expanded state.
* @param accordion Accordion to set up.
* @returns void
*/
setUpAccordion(accordion) {
this.items = []; // reset items array
// provide service with necessary Directives
this.accordion = accordion;
this.headings = accordion.headings.toArray();
this.panels = accordion.panels.toArray();
// return or warn for edge cases of no or mismatched headings + panels
if (this.headings.length === 0 || this.panels.length === 0)
return;
if (this.headings.length !== this.panels.length) {
console.warn(`
The number of accordion headings and panels are not equal.
Behavior may be off as a result.
Please ensure each heading has a matching panel.
`);
}
this.headings.forEach((heading, index) => {
// set index at heading level.
heading._index = index;
/**
* Each item requires a controlling button
* This will either be an [v-button][v-accordion-heading] or a child button of an accordion-heading
*/
let buttonHeading = heading.hostButton
? heading.hostButton
: heading._buttonHeading
? heading._buttonHeading
: undefined;
// create array of items with each controlling button and respective panel
if (this.panels[index] && buttonHeading) {
this.items.push({ heading: heading, button: buttonHeading, panel: this.panels[index] });
this.setUpPanel(index, heading.expanded);
this.setUpButton(buttonHeading, index, heading.expanded);
}
});
}
/**
* The setUpPanel method configures a panel with index, expanded state, and assigns an id if not provided.
* @param index Index of panel to set up.
* @param expanded Expanded state of panel's associated accordion item.
*/
setUpPanel(index, expanded) {
// aligns panel index and expanded to associated heading
this.panels[index]._index = index;
this.panels[index]._expanded = expanded;
this.panels[index].id = this.panels[index].id
? this.panels[index].id
: this.uuidService.getUUID('v-accordion-panel-');
}
/**
* The setUpButton method configures a button with id, aria-controls, aria-expanded attributes, and the appropriate toggle icon.
* @param buttonHeading Button to set up.
* @param index Index of button to set up.
* @param expanded Expanded state of button's associated accordion item.
*/
setUpButton(buttonHeading, index, expanded) {
// sets up controlling button's aria properties
buttonHeading.id = buttonHeading.id ? buttonHeading.id : this.uuidService.getUUID('v-accordion-button-');
buttonHeading.ariaControls = this.panels[index].id;
buttonHeading.ariaExpanded = expanded;
if (buttonHeading.toggleIcon) {
buttonHeading.toggleIcon.class = [buttonHeading.toggleIcon.class, 'v-accordion-toggle-icon'].join(' ');
if (!buttonHeading.toggleIcon._iconSet) {
if (!buttonHeading.toggleIcon._expandedSet)
buttonHeading.toggleIcon.expandedIcon = 'chevron-down';
if (!buttonHeading.toggleIcon._collapsedSet)
buttonHeading.toggleIcon.collapsedIcon = 'chevron-right';
buttonHeading.toggleIcon.icon.icon = expanded
? buttonHeading.toggleIcon.expandedIcon
: buttonHeading.toggleIcon.collapsedIcon;
}
}
else if (buttonHeading.toggleIconComponent) {
buttonHeading.toggleIconComponent._accordionToggle = true;
buttonHeading.toggleIconComponent.rotated = expanded;
}
}
/**
* The toggleItem method reverses the current state of the accordion. If collapsed, it expands; if expanded, it collapses. If it was collapsed, the function will expand. If it was expanded, the function will collapse.
* @param index Index of accordion item to toggle.
*/
toggleItem(index) {
this.items[index]['heading'].expanded = !this.items[index]['heading'].expanded;
}
/**
* The expandItem method expands the accordion by showing panel content, setting the button’s aria-expanded to true, and changing the toggle icon to expandedIcon.
* @param index Index of accordion item to expand.
*/
expandItem(index) {
if (this.items[index]) {
this.items[index]['panel']._expanded = true;
this.items[index]['button'].ariaExpanded = true;
if (this.items[index]['button'].toggleIcon && !this.items[index]['button'].toggleIcon._iconSet) {
this.items[index]['button'].toggleIcon.icon.icon = this.items[index]['button'].toggleIcon.expandedIcon;
}
else if (this.items[index]['button'].toggleIconComponent) {
this.items[index]['button'].toggleIconComponent.rotated = true;
}
}
}
/**
* The collapseItem method collapses the accordion by hiding panel content, setting the button’s aria-expanded to false, and changing the toggle icon to collapsedIcon.
* @param index Index of accordion item to collapse.
*/
collapseItem(index) {
if (this.items[index]) {
this.items[index]['panel']._expanded = false;
this.items[index]['button'].ariaExpanded = false;
if (this.items[index]['button'].toggleIcon && !this.items[index]['button'].toggleIcon._iconSet) {
this.items[index]['button'].toggleIcon.icon.icon = this.items[index]['button'].toggleIcon.collapsedIcon;
}
else if (this.items[index]['button'].toggleIconComponent) {
this.items[index]['button'].toggleIconComponent.rotated = false;
}
}
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: AccordionService, deps: [{ token: i1.UUIDService }], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: AccordionService }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: AccordionService, decorators: [{
type: Injectable
}], ctorParameters: () => [{ type: i1.UUIDService }] });
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*              Copyright (c) 2025 Visa, Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *         http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n *\n **/\nimport { Injectable } from '@angular/core';\nimport { UUIDService } from '../_utilities/services/uuid.service';\nimport { AccordionHeadingDirective } from '../accordion-heading/accordion-heading.directive';\nimport { AccordionPanelDirective } from '../accordion-panel/accordion-panel.directive';\nimport { ButtonDirective } from '../button/button.directive';\nimport { AccordionDirective } from './accordion.directive';\n\n/**\n * AccordionService is an internal service used to create accordion behavior and is used within the accordion component.\n */\n@Injectable()\nexport class AccordionService {\n  constructor(private uuidService: UUIDService) {}\n\n  /** @ignore */\n  accordion: AccordionDirective;\n  /** @ignore */\n  items: { heading: AccordionHeadingDirective; button: ButtonDirective; panel: AccordionPanelDirective }[] = [];\n  /** @ignore */\n  headings: AccordionHeadingDirective[];\n  /** @ignore */\n  panels: AccordionPanelDirective[];\n\n  /**\n   * The setUpAccordion method sets up the accordion by pairing accordion headings with their respective panels and having them reflect the same expanded state.\n   * @param accordion Accordion to set up.\n   * @returns void\n   */\n  setUpAccordion(accordion: AccordionDirective) {\n    this.items = []; // reset items array\n    // provide service with necessary Directives\n    this.accordion = accordion;\n    this.headings = accordion.headings.toArray();\n    this.panels = accordion.panels.toArray();\n\n    // return or warn for edge cases of no or mismatched headings + panels\n    if (this.headings.length === 0 || this.panels.length === 0) return;\n    if (this.headings.length !== this.panels.length) {\n      console.warn(`\n        The number of accordion headings and panels are not equal. \n        Behavior may be off as a result. \n        Please ensure each heading has a matching panel.\n      `);\n    }\n\n    this.headings.forEach((heading, index) => {\n      // set index at heading level.\n      heading._index = index;\n\n      /**\n       * Each item requires a controlling button\n       * This will either be an [v-button][v-accordion-heading] or a child button of an accordion-heading\n       */\n      let buttonHeading: ButtonDirective | undefined = heading.hostButton\n        ? heading.hostButton\n        : heading._buttonHeading\n          ? heading._buttonHeading\n          : undefined;\n\n      // create array of items with each controlling button and respective panel\n      if (this.panels[index] && buttonHeading) {\n        this.items.push({ heading: heading, button: buttonHeading, panel: this.panels[index] });\n\n        this.setUpPanel(index, heading.expanded);\n        this.setUpButton(buttonHeading, index, heading.expanded);\n      }\n    });\n  }\n\n  /**\n   * The setUpPanel method configures a panel with index, expanded state, and assigns an id if not provided.\n   * @param index Index of panel to set up.\n   * @param expanded Expanded state of panel's associated accordion item.\n   */\n  setUpPanel(index: number, expanded: boolean) {\n    // aligns panel index and expanded to associated heading\n    this.panels[index]._index = index;\n    this.panels[index]._expanded = expanded;\n    this.panels[index].id = this.panels[index].id\n      ? this.panels[index].id\n      : this.uuidService.getUUID('v-accordion-panel-');\n  }\n\n  /**\n   * The setUpButton method configures a button with id, aria-controls, aria-expanded attributes, and the appropriate toggle icon.\n   * @param buttonHeading Button to set up.\n   * @param index Index of button to set up.\n   * @param expanded Expanded state of button's associated accordion item.\n   */\n  setUpButton(buttonHeading: ButtonDirective, index: number, expanded: boolean) {\n    // sets up controlling button's aria properties\n    buttonHeading.id = buttonHeading.id ? buttonHeading.id : this.uuidService.getUUID('v-accordion-button-');\n    buttonHeading.ariaControls = this.panels[index].id;\n    buttonHeading.ariaExpanded = expanded;\n    if (buttonHeading.toggleIcon) {\n      buttonHeading.toggleIcon.class = [buttonHeading.toggleIcon.class, 'v-accordion-toggle-icon'].join(' ');\n      if (!buttonHeading.toggleIcon._iconSet) {\n        if (!buttonHeading.toggleIcon._expandedSet) buttonHeading.toggleIcon.expandedIcon = 'chevron-down';\n        if (!buttonHeading.toggleIcon._collapsedSet) buttonHeading.toggleIcon.collapsedIcon = 'chevron-right';\n        buttonHeading.toggleIcon.icon.icon = expanded\n          ? buttonHeading.toggleIcon.expandedIcon\n          : buttonHeading.toggleIcon.collapsedIcon;\n      }\n    } else if (buttonHeading.toggleIconComponent) {\n      buttonHeading.toggleIconComponent._accordionToggle = true;\n      buttonHeading.toggleIconComponent.rotated = expanded;\n    }\n  }\n\n  /**\n   * The toggleItem method reverses the current state of the accordion. If collapsed, it expands; if expanded, it collapses. If it was collapsed, the function will expand. If it was expanded, the function will collapse.\n   * @param index Index of accordion item to toggle.\n   */\n  toggleItem(index: number) {\n    this.items[index]['heading'].expanded = !this.items[index]['heading'].expanded;\n  }\n\n  /**\n   * The expandItem method expands the accordion by showing panel content, setting the button’s aria-expanded to true, and changing the toggle icon to expandedIcon.\n   * @param index Index of accordion item to expand.\n   */\n  expandItem(index: number) {\n    if (this.items[index]) {\n      this.items[index]['panel']._expanded = true;\n      this.items[index]['button'].ariaExpanded = true;\n      if (this.items[index]['button'].toggleIcon && !this.items[index]['button'].toggleIcon._iconSet) {\n        this.items[index]['button'].toggleIcon.icon.icon = this.items[index]['button'].toggleIcon.expandedIcon;\n      } else if (this.items[index]['button'].toggleIconComponent) {\n        this.items[index]['button'].toggleIconComponent.rotated = true;\n      }\n    }\n  }\n\n  /**\n   * The collapseItem method collapses the accordion by hiding panel content, setting the button’s aria-expanded to false, and changing the toggle icon to collapsedIcon.\n   * @param index Index of accordion item to collapse.\n   */\n  collapseItem(index: number) {\n    if (this.items[index]) {\n      this.items[index]['panel']._expanded = false;\n      this.items[index]['button'].ariaExpanded = false;\n      if (this.items[index]['button'].toggleIcon && !this.items[index]['button'].toggleIcon._iconSet) {\n        this.items[index]['button'].toggleIcon.icon.icon = this.items[index]['button'].toggleIcon.collapsedIcon;\n      } else if (this.items[index]['button'].toggleIconComponent) {\n        this.items[index]['button'].toggleIconComponent.rotated = false;\n      }\n    }\n  }\n}\n"]}