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/**
* This file is part of Haketilo.
*
* Function: Operations on DOM elements.
*
* Copyright (C) 2021 Wojtek Kosior
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* As additional permission under GNU GPL version 3 section 7, you
* may distribute forms of that code without the copy of the GNU
* GPL normally required by section 4, provided you include this
* license notice and, in case of non-source distribution, a URL
* through which recipients can access the Corresponding Source.
* If you modify file(s) with this exception, you may extend this
* exception to your version of the file(s), but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* As a special exception to the GPL, any HTML file which merely
* makes function calls to this code, and for that purpose
* includes it by reference shall be deemed a separate work for
* copyright law purposes. If you modify this code, you may extend
* this exception to your version of the code, but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* I, Wojtek Kosior, thereby promise not to sue for violation of this file's
* license. Although I request that you do not make use of this code in a
* proprietary program, I am not going to enforce this in court.
*/
#EXPORT id => document.getElementById(id) AS by_id
const known_templates = new Map();
function get_template(template_id)
{
let template = known_templates.get(template_id) || null;
if (template)
return template;
for (const template_node of document.getElementsByTagName("TEMPLATE")) {
template = template_node.content.getElementById(template_id);
if (template)
break;
}
known_templates.set(template_id, template);
return template;
}
#EXPORT get_template
function clone_template(template_id)
{
const clone = get_template(template_id).cloneNode(true);
const result_object = {};
const to_process = [clone];
while (to_process.length > 0) {
const element = to_process.pop();
let template_key = element.getAttribute("data-template") || element.id;
if (template_key)
result_object[template_key] = element;
element.removeAttribute("id");
element.removeAttribute("data-template");
for (const child of element.children)
to_process.push(child);
}
return result_object;
}
#EXPORT clone_template
function Showable(on_show_cb, on_hide_cb) {
this.shown = false;
/*
* Wrap the requested callback into one that only executes it if showable is
* not shown.
*/
this.when_hidden = cb => {
const wrapped_cb = (...args) => {
if (!this.shown)
return cb(...args);
}
return wrapped_cb;
}
this.show = () => {
if (this.shown)
return false;
this.shown = true;
try {
on_show_cb();
} catch(e) {
console.error(e);
}
return true;
}
this.hide = () => {
if (!this.shown)
return false;
this.shown = false;
try {
on_hide_cb();
} catch(e) {
console.error(e);
}
return true;
}
}
#EXPORT Showable
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