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import { property } from 'lit/decorators.js';
import { RapidElement } from '../RapidElement';
import { renderMarkdownInline } from '../markdown';
import { designTokens } from '../styles/designTokens';
/**
* FieldElement is a base class for form components that provides built-in
* field wrapper functionality, eliminating the need for manual temba-field embedding.
*
* Components extending this class only need to implement renderWidget() with their
* specific widget content, and the field wrapper (label, errors, help text) is
* automatically handled.
*/
export abstract class FieldElement extends RapidElement {
@property({ type: String })
name = '';
@property({ type: String, attribute: 'help_text' })
helpText: string;
@property({ type: Boolean, attribute: 'widget_only' })
widgetOnly: boolean;
@property({ type: Array })
errors: string[];
// Use @property with custom getter/setter to handle both attribute and programmatic access
private _value: any = '';
@property({ type: String })
public get value() {
return this._value;
}
public set value(value) {
this._value = value;
}
@property({ attribute: false })
inputRoot: HTMLElement = this;
@property({ type: Boolean })
disabled = false;
static formAssociated = true;
protected internals: ElementInternals;
@property({ type: Boolean })
hideErrors = false;
@property({ type: Boolean, attribute: 'hide_label' })
hideLabel: boolean;
@property({ type: String })
label: string;
constructor() {
super();
this.internals = this.attachInternals();
}
static get styles() {
return css`
${designTokens}
:host {
font-family: var(--font-family);
}
label {
margin-bottom: 6px;
display: block;
font-weight: var(--w-medium);
font-size: 12.5px;
line-height: normal;
color: var(--color-label);
}
.help-text {
font-size: 12px;
line-height: normal;
color: var(--color-text-help);
margin-top: 6px;
opacity: 1;
}
.alert-error {
position: absolute;
top: 100%;
left: 0;
right: 0;
z-index: 1000;
background: white;
border: 1px solid var(--color-error);
color: var(--color-error);
padding: 8px 12px;
margin: 2px 0 0 0;
border-radius: var(--curvature);
box-shadow:
0 4px 6px -1px rgba(0, 0, 0, 0.1),
0 2px 4px -1px rgba(0, 0, 0, 0.06);
font-size: 0.85em;
line-height: 1.2;
opacity: 0;
visibility: hidden;
transform: translateY(-12px);
transition:
opacity 0.2s ease-in-out,
visibility 0.2s ease-in-out,
transform 0.2s ease-in-out;
}
.field:hover .alert-error {
opacity: 1;
visibility: visible;
transform: translateY(2px);
}
/* Hide error popup when widget is focused */
.field:focus-within .alert-error {
opacity: 0;
visibility: hidden;
transform: translateY(-4px);
}
.field.has-error {
position: relative;
/* Set CSS custom properties that form components can use */
--color-widget-border: var(--color-error);
--widget-box-shadow-focused: var(
--widget-box-shadow-focused-error,
0 0 0 3px rgba(255, 99, 71, 0.3)
);
--color-focus: var(--color-error);
}
.field.has-error .widget {
border-radius: var(--curvature-widget);
position: relative;
}
/* Force error styling with higher specificity */
:host(.has-error) .field.has-error .widget .input-container,
:host(.has-error) .field.has-error .widget .select-container,
:host(.has-error) .field.has-error .widget .comp-container,
:host(.has-error) .field.has-error .widget .checkbox-container,
:host(.has-error) .field.has-error .widget .container,
:host(.has-error) .field.has-error .widget .range-container,
.field.has-error .widget .input-container,
.field.has-error .widget .select-container,
.field.has-error .widget .comp-container,
.field.has-error .widget .checkbox-container,
.field.has-error .widget .container,
.field.has-error .widget .range-container {
border-color: var(--color-error) !important;
}
/* When error field is focused, use error-colored focus ring */
:host(.has-error) .field.has-error .widget .input-container:focus-within,
:host(.has-error) .field.has-error .widget .select-container:focus-within,
:host(.has-error) .field.has-error .widget .select-container.focused,
:host(.has-error) .field.has-error .widget .comp-container:focus-within,
:host(.has-error)
.field.has-error
.widget
.checkbox-container:focus-within,
:host(.has-error) .field.has-error .widget .container:focus-within,
:host(.has-error) .field.has-error .widget .range-container:focus-within,
.field.has-error .widget .input-container:focus-within,
.field.has-error .widget .select-container:focus-within,
.field.has-error .widget .select-container.focused,
.field.has-error .widget .comp-container:focus-within,
.field.has-error .widget .checkbox-container:focus-within,
.field.has-error .widget .container:focus-within,
.field.has-error .widget .range-container:focus-within {
border-color: var(--color-error) !important;
box-shadow: var(
--widget-box-shadow-focused-error,
0 0 0 3px rgba(255, 99, 71, 0.3)
) !important;
}
.alert-error p {
margin: 0;
padding: 0;
}
.disabled {
opacity: var(--disabled-opacity) !important;
pointer-events: none !important;
}
`;
}
updated(changedProperties: Map<string, any>): void {
super.updated(changedProperties);
if (changedProperties.has('value')) {
this.internals.setFormValue(this.value);
}
if (
changedProperties.has('errors') ||
changedProperties.has('hideErrors')
) {
const hasErrors =
!this.hideErrors && this.errors && this.errors.length > 0;
this.classList.toggle('has-error', hasErrors);
}
}
get form() {
return this.internals.form;
}
public setValue(value: any) {
this.value = this.serializeValue(value);
}
public getDeserializedValue(): any {
if (!this.value || this.value === '') {
return null;
}
return JSON.parse(this.value);
}
public serializeValue(value: any): string {
return JSON.stringify(value);
}
/**
* Abstract method that components must implement to render their specific widget content.
* This replaces the need to manually embed temba-field.
*/
protected abstract renderWidget(): TemplateResult;
/**
* Renders the complete field including label, widget, errors, and help text.
* Components can override this for custom layouts, but typically should just implement renderWidget().
*/
protected renderField(): TemplateResult {
const hasErrors = !this.hideErrors && this.errors && this.errors.length > 0;
const errors = hasErrors
? this.errors.map((error: string) => {
return html`
<div class="alert-error">${renderMarkdownInline(error)}</div>
`;
})
: [];
if (this.widgetOnly) {
return html`
<div class="${this.disabled ? 'disabled' : ''}">
${this.renderWidget()}
</div>
${errors}
`;
}
return html`
<div
class="field ${this.disabled ? 'disabled' : ''} ${hasErrors
? 'has-error'
: ''}"
>
${!!this.name && !this.hideLabel && !!this.label
? html`
<label class="control-label" for="${this.name}"
>${this.label}</label
>
`
: null}
<div class="widget">${this.renderWidget()} ${errors}</div>
${this.helpText && this.helpText !== 'None'
? html`
<div class="help-text">
${renderMarkdownInline(this.helpText)}
</div>
`
: null}
</div>
`;
}
/**
* Main render method that automatically provides field wrapper functionality.
* Components extending FieldElement should not override this unless they need custom field layouts.
*/
public render(): TemplateResult {
return this.renderField();
}
}
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