89 lines
2.9 KiB
JavaScript
89 lines
2.9 KiB
JavaScript
//---------------------------------------------------------------------------
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// @syndicate-lang/driver-browser-ui, Browser-based UI for Syndicate
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// Copyright (C) 2016-2018 Tony Garnock-Jones <tonyg@leastfixedpoint.com>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//---------------------------------------------------------------------------
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assertion type htmlTag(label, properties, children);
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assertion type htmlProperty(key, value);
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assertion type htmlFragment(children);
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assertion type htmlLiteral(text);
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export function html(tag, props, ...kids) {
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if (tag === htmlFragment) {
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// JSX short syntax for fragments doesn't allow properties, so
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// props will never have any defined.
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return htmlFragment(kids);
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} else {
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let properties = []
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for (let k in props) {
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properties.push(htmlProperty(k, props[k]));
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}
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return htmlTag(tag, properties, kids);
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}
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}
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//---------------------------------------------------------------------------
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export function escapeHtml(s) {
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return s
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.replace(/&/g, "&")
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.replace(/</g, "<")
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.replace(/>/g, ">")
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.replace(/"/g, """)
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.replace(/'/g, "'");
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}
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export const emptyHtmlElements = {};
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for (let e of
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"area base br col embed hr img input keygen link meta param source track wbr".split(/ +/)) {
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emptyHtmlElements[e] = true;
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}
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export function htmlToString(j) {
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let pieces = [];
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function walk(j) {
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if (htmlTag.isClassOf(j)) {
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pieces.push('<', htmlTag._label(j));
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htmlTag._properties(j).forEach(
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(p) => pieces.push(' ', escapeHtml(htmlProperty._key(p)),
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'="', escapeHtml(htmlProperty._value(p)), '"'));
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pieces.push('>');
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htmlTag._children(j).forEach(walk);
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if (!(htmlTag._label(j) in emptyHtmlElements)) {
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pieces.push('</', htmlTag._label(j), '>');
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}
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} else if (htmlFragment.isClassOf(j)) {
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htmlFragment._children(j).forEach(walk);
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} else if (htmlLiteral.isClassOf(j)) {
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pieces.push(htmlLiteral._text(j));
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} else if (typeof j === 'object' && j && typeof j[Symbol.iterator] === 'function') {
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for (let k of j) { walk(k); }
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} else {
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pieces.push(escapeHtml("" + j));
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}
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}
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walk(j);
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return pieces.join('');
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}
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export function htmlToNode(j) {
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var node = document.createElement('div');
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node.innerHTML = htmlToString(j);
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return node.firstChild;
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}
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