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49 lines
1.1 KiB
TypeScript
49 lines
1.1 KiB
TypeScript
// Export the Interface for TypeScript
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import {LitElement} from "lit";
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type Constructor<T = {}> = new (...args : any[]) => T;
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/**
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* Mixin to support widgets that have a set number of rows.
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* Whether that's a maximum or a fixed size, implementation is up to the widget.
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* Set rows=0 to clear.
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*
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* To implement in a webcomponent set height or max-height based on the --rows CSS variable:
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* max-height: calc(var(--rows, 5) * 1.3rem);
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* @param {T} superclass
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* @constructor
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*/
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export const RowLimitedMixin = <T extends Constructor<LitElement>>(superclass : T) =>
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{
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class RowLimit extends superclass
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{
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static get properties()
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{
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return {
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...super.properties,
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}
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}
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set rows(row_count : string | number)
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{
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if(isNaN(Number(row_count)) || !row_count)
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{
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this.style.removeProperty("--rows");
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this.removeAttribute("rows");
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}
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else
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{
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this.style.setProperty("--rows", row_count);
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this.setAttribute("rows", row_count)
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}
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}
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get rows() : string | number
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{
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return this.style.getPropertyValue("--rows");
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}
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}
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return RowLimit;// as unknown as superclass & T;
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} |