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editor: count chars and words in textarea
* Adds counters in textarea for chars and words, depending on the configuration. * Avoids to exceed the counts when typing. * Checks for new resource context to avoid `pid` to be set in model. Co-Authored-by: Sébastien Délèze <[email protected]>
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Sébastien Délèze
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Apr 13, 2021
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| { | ||
| "singleQuote": true | ||
| "singleQuote": true, | ||
| "printWidth": 120 | ||
| } |
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projects/rero/ng-core/src/lib/record/editor/type/textarea/textarea.component.ts
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| /* | ||
| * RERO angular core | ||
| * Copyright (C) 2020 RERO | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero General Public License as published by | ||
| * the Free Software Foundation, version 3 of the License. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Affero General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| import { ChangeDetectionStrategy, Component, OnInit } from '@angular/core'; | ||
| import { AbstractControl, ValidatorFn } from '@angular/forms'; | ||
| import { FormlyFieldTextArea } from '@ngx-formly/bootstrap'; | ||
|
|
||
| @Component({ | ||
| selector: 'ng-core-editor-formly-field-textarea', | ||
| template: ` | ||
| <textarea | ||
| [formControl]="formControl" | ||
| [cols]="to.cols" | ||
| [rows]="to.rows" | ||
| class="form-control" | ||
| [class.is-invalid]="showError" | ||
| [formlyAttributes]="field" | ||
| ></textarea> | ||
| <ng-container | ||
| [ngTemplateOutlet]="counter" | ||
| [ngTemplateOutletContext]="{ | ||
| limit: field.templateOptions.limitWords, | ||
| count: countWords, | ||
| label: 'Number of words' | translate | ||
| }" | ||
| *ngIf="field.templateOptions.limitWords || field.templateOptions.displayWords" | ||
| ></ng-container> | ||
| <ng-container | ||
| [ngTemplateOutlet]="counter" | ||
| [ngTemplateOutletContext]="{ | ||
| limit: field.templateOptions.limitChars, | ||
| count: countChars, | ||
| label: 'Number of chars' | translate | ||
| }" | ||
| *ngIf="field.templateOptions.limitChars || field.templateOptions.displayChars" | ||
| ></ng-container> | ||
| <ng-template #counter let-limit="limit" let-count="count" let-label="label"> | ||
| <span class="small text-muted d-inline-block mr-3"> | ||
| {{ label }}: {{ count }} | ||
| <ng-container *ngIf="limit"> / {{ limit }} </ng-container> | ||
| </span> | ||
| </ng-template> | ||
| `, | ||
| changeDetection: ChangeDetectionStrategy.OnPush, | ||
| // means change detection is triggered only when @input changed. | ||
| }) | ||
| export class TextareaFieldComponent extends FormlyFieldTextArea implements OnInit { | ||
| /** | ||
| * Get the number of chars. | ||
| * | ||
| * @returns The number of chars. | ||
| */ | ||
| get countChars(): number { | ||
| return !this.formControl.value ? 0 : this.formControl.value.length; | ||
| } | ||
|
|
||
| /** | ||
| * Get the number of words. | ||
| * | ||
| * @returns The number of words. | ||
| */ | ||
| get countWords(): number { | ||
| return !this.formControl.value ? 0 : this.formControl.value.split(/\s+/).length; | ||
| } | ||
|
|
||
| /** | ||
| * Component init. | ||
| * | ||
| * Adds validator for chars and words. | ||
| * Check if the current value does not exceed the limit value for chars or words. | ||
| */ | ||
| ngOnInit(): void { | ||
| if (this.field.templateOptions.limitWords || this.field.templateOptions.limitChars) { | ||
| this.formControl.setValidators([this.limitValidator(), this.formControl.validator]); | ||
| this.formControl.updateValueAndValidity(); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Form validator to check if the value is not greater than the limit. | ||
| * | ||
| * @returns A validator function returning the eventual error. | ||
| */ | ||
| limitValidator(): ValidatorFn { | ||
| return (control: AbstractControl): { [key: string]: any } | null => { | ||
| if (this.field.templateOptions.limitWords && this.countWords > this.field.templateOptions.limitWords) { | ||
| return { limitWords: { value: control.value } }; | ||
| } | ||
|
|
||
| if (this.field.templateOptions.limitChars && this.countChars > this.field.templateOptions.limitChars) { | ||
| return { limitChars: { value: control.value } }; | ||
| } | ||
|
|
||
| return null; | ||
| }; | ||
| } | ||
| } |
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