102 lines
3.3 KiB
JavaScript
102 lines
3.3 KiB
JavaScript
'use strict';
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function messageBox({
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title, // [mandatory] string
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contents, // [mandatory] 1) DOM element 2) string
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className = '', // string, CSS class name of the message box element
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buttons = [], // array of strings or objects like {textContent[string], onclick[function]}.
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onshow, // function(messageboxElement) invoked after the messagebox is shown
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blockScroll, // boolean, blocks the page scroll
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}) { // RETURNS: Promise resolved to {button[number], enter[boolean], esc[boolean]}
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initOwnListeners();
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bindGlobalListeners();
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createElement();
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document.body.appendChild(messageBox.element);
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if (onshow) {
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onshow(messageBox.element);
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}
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return new Promise(_resolve => {
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messageBox.resolve = _resolve;
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});
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function initOwnListeners() {
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messageBox.listeners = messageBox.listeners || {
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closeIcon() {
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resolveWith({button: -1});
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},
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button() {
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resolveWith({button: this.buttonIndex});
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},
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key(event) {
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const keyCode = event.keyCode || event.which;
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if (!event.shiftKey && !event.ctrlKey && !event.altKey && !event.metaKey
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&& (keyCode === 13 || keyCode === 27)) {
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event.preventDefault();
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event.stopPropagation();
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resolveWith(keyCode === 13 ? {enter: true} : {esc: true});
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}
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},
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scroll() {
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scrollTo(blockScroll.x, blockScroll.y);
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}
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};
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}
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function resolveWith(value) {
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unbindGlobalListeners();
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setTimeout(messageBox.resolve, 0, value);
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animateElement(messageBox.element, {
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className: 'fadeout',
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onComplete: removeSelf,
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});
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}
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function createElement() {
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if (messageBox.element) {
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unbindGlobalListeners();
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removeSelf();
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}
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const id = 'message-box';
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messageBox.element = $element({id, className, appendChild: [
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$element({appendChild: [
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$element({id: `${id}-title`, textContent: title}),
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$element({id: `${id}-close-icon`, appendChild:
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$element({tag: 'SVG#svg', class: 'svg-icon', viewBox: '0 0 20 20', appendChild:
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$element({tag: 'SVG#path', d: 'M11.69,10l4.55,4.55-1.69,1.69L10,11.69,' +
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'5.45,16.23,3.77,14.55,8.31,10,3.77,5.45,5.45,3.77,10,8.31l4.55-4.55,1.69,1.69Z',
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})
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}),
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onclick: messageBox.listeners.closeIcon}),
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$element({id: `${id}-contents`, appendChild: tHTML(contents)}),
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$element({id: `${id}-buttons`, appendChild:
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buttons.map((content, buttonIndex) => content && $element({
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tag: 'button',
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buttonIndex,
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textContent: content.textContent || content,
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onclick: content.onclick || messageBox.listeners.button,
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}))
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}),
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]}),
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]});
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}
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function bindGlobalListeners() {
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blockScroll = blockScroll && {x: scrollX, y: scrollY};
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if (blockScroll) {
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window.addEventListener('scroll', messageBox.listeners.scroll);
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}
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window.addEventListener('keydown', messageBox.listeners.key, true);
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}
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function unbindGlobalListeners() {
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window.removeEventListener('keydown', messageBox.listeners.key, true);
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window.removeEventListener('scroll', messageBox.listeners.scroll);
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}
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function removeSelf() {
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messageBox.element.remove();
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messageBox.element = null;
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messageBox.resolve = null;
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}
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}
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