62 lines
1.6 KiB
TypeScript
62 lines
1.6 KiB
TypeScript
// Copyright: Ankitects Pty Ltd and contributors
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// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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import {
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filterElementBasic,
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filterElementExtended,
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filterElementInternal,
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} from "./element";
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import { filterNode } from "./node";
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enum FilterMode {
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Basic,
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Extended,
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Internal,
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}
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const filters: Record<FilterMode, (element: Element) => void> = {
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[FilterMode.Basic]: filterElementBasic,
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[FilterMode.Extended]: filterElementExtended,
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[FilterMode.Internal]: filterElementInternal,
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};
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const whitespace = /[\n\t ]+/g;
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function collapseWhitespace(value: string): string {
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return value.replace(whitespace, " ");
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}
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function trim(value: string): string {
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return value.trim();
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}
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const outputHTMLProcessors: Record<FilterMode, (outputHTML: string) => string> = {
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[FilterMode.Basic]: (outputHTML: string): string =>
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trim(collapseWhitespace(outputHTML)),
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[FilterMode.Extended]: trim,
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[FilterMode.Internal]: trim,
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};
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export function filterHTML(html: string, internal: boolean, extended: boolean): string {
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const template = document.createElement("template");
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template.innerHTML = html;
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const mode = getFilterMode(internal, extended);
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const content = template.content;
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const filter = filterNode(filters[mode]);
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filter(content);
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return outputHTMLProcessors[mode](template.innerHTML);
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}
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function getFilterMode(internal: boolean, extended: boolean): FilterMode {
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if (internal) {
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return FilterMode.Internal;
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} else if (extended) {
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return FilterMode.Extended;
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} else {
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return FilterMode.Basic;
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}
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}
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